Attitudes of U.N.R.W.A. School Pprincipals Towards Physical Education Program |
| Mohd. Khamis Abu Nimreh |
| Received : 15-07-2001 , Accepted : 29-01-2002 |
| Language: Arabic |
Abstract |
The purpose of the study was to determine the attitudes of U।N.R.W.A school principals towards the physical education program. The sample of the study comprised (90) male and female school principals. The researcher used (33) items questionnaire to determine the principals attitudes after testing its validity and reliability. The questionnaire contains (4) domains: Financial support and activities, Planning, Leadership, and Evaluation. The results of the study were as follows: 1. U.N.R.W.A. school principals showed positive attitudes towards the physical education program. 2. There were no significant differences between male and female school principals attitudes in all domains and total score of the questionnaire. 3. There were significant differences due to the year of experience in financial support and activities sub-scale and in Planning sub-scale of the questionnaire. 4. No significant differences existed due to academic qualifications in all sub-scales of the questionnaire. The researcher recommended the following: 1. Reinforcement of the positive attitudes of school principals toward P.E. program. 2. Organizing and conducting seminars on the supervision of P.E. program in general to school principals to improve their skills in this area. 3. Conducting research studies dealing with the students attitudes towards physical education – program. |
Thursday, December 3, 2009
Attitudes of U.N.R.W.A. School Pprincipals Towards Physical Education Program
The Ownership of Sultan Abdul-Hamid II in Palestine (1876-1937)
| An-Najah University Journal for Research - Humanities (B) ISSN: 1727-8449 | |
| Volume 17 , Issue 1 , 2003, Pages: 221-260 | |
| |
The Ownership of Sultan Abdul-Hamid II in Palestine (1876-1937) | |
| Ameen Abu Bakr | |
| aabubaker@qou.edu | |
| Received : 17-06-2002 , Accepted : 09-02-2003 | |
| Language: Arabic | |
Abstract | |
This subject deals with the land ownership of Sultan Abdul-Hamid II in Palestine during the period from 1876 to 1937. These lands have been known by various titles including the lands of Jeftlek, the Sultanate, and the Hamidian. The areas of these lands which equal about 2.5 million dunums broke the record of all the ownership that Palestine has witnessed in the modern age. The subject has been approached in three main axes. The first dealt with the factors that influenced the ownership formation specifically the enforcement system that was put in effect due to the economical, social and political conditions of Palestine. The other factor was the development policy adopted by the Ottoman Empire during the age of organization and the resistance of the foreign interpenetration movement. The second axis dealt with the size of ownership and the extent of its spread in the three Palestinian districts: Acre, Nablus, and Jerusalem. It focused in Al-Hawla basin, the sources of the Jordan River, the plain of Bisan valley, al-Fara’ valley, the plain of Jericho, the hill of Irad, the side of Zerqa River, Rafah, and other locations. The third axis was dedicated to deal with the radical changes that overwhelmed the Jeftlek lands. It also concentrated on the process of solving the question of ownership and returning them to the state treasury. In addition it dealt with the attempts of the foreign interpenetration movement specifically the Zionist corporations after the expulsion of the Sultan by the Union and Development Society in 1909 until it was settled during the British Mandate in 1937. | |
The Palestinian Judiciary Independence Obstacles (Between 1994-1998)
| An-Najah University Journal for Research - Humanities (B) ISSN: 1727-8449 | |
| Volume 16 , Issue 2 , 2002, Pages: 359-389 | |
| |
The Palestinian Judiciary Independence Obstacles (Between 1994-1998) | |
| Ahmad Al-Khalidi | |
| Faculty of Law, An-Najah National University, Nablus, Palestine | |
| Received : 06-01-2001 , Accepted : 20-11-2001 | |
| Language: Arabic | |
Abstract | |
We studied judiciary independence through elements of judgement independence and guaranties, by analyzing the judiciary independence obstacles। This study shows a mechanism to achieve such independence through several elements. Firstly, the independence of al-qadaa is toward the legislative authourity and confronting the executive authority, the public opinion and journalism. Secondly, judgement independence of the judge himself / herself has also been targetted. Hiad al-qadi and his / her vituousness to the judgement independence should be guaranteed. | |
English Language Teacher’s Implementation of Effective Teaching Principles in Nablus Schools
| An-Najah University Journal for Research - Humanities (B) ISSN: 1727-8449 | |
| Volume 16 , Issue 2 , 2002, Pages: 441-468 | |
| |
English Language Teacher’s Implementation of Effective Teaching Principles in Nablus Schools | |
| Fawaz Aqel | |
| Department of Teaching Methodology, Faculty of Educational Sciences, An-Najah National University, Nablus, Palestine | |
| Received : 28-04-2001 , Accepted : 05-05-2002 | |
| Language: Arabic | |
Abstract | |
This study aimed at identifying the English language teachers’ implementation of effective teaching principles in Nablus schools। To achieve this goal, the study attempted to answer the following questions. 1. What was the degree of implementation of the effective teaching by English language teacher in Nablus Schools? 2. Did the degree of implementing effective teaching by English language teachers differ according to gender? 3. Did the degree of implementing effective teaching by English language teachers differ according to academic qualification? 4. Did the degree of implementing effective teaching by English language teachers differ according to experience? The instrument was validated and proved to be reliable. Data were collected and analyzed. the results showed that classroom mangement, teaching ability were the most practised principles, where as araluation and profess and development were the least implemented principles. In light of these findings, the researcher arrived at a number of recommendations such as the English language teachers’ pursue of their study, and require English language teachers to participate in short courses and workshops. | |
The Level of Disclosure in Financial Statement of Banks And Similar Companies in Jordan - An Empirical Study
| An-Najah University Journal for Research - Humanities (B) ISSN: 1727-8449 | |
| Volume 17 , Issue 1 , 2003, Pages: 087-116 | |
| |
The Level of Disclosure in Financial Statement of Banks And Similar Companies in Jordan - An Empirical Study | |
| Huseen Khasharmeh | |
| hkhasharmeh@uaeu.ac.ae | |
| Received : 15-07-2001 , Accepted : 09-02-2003 | |
| Language: Arabic | |
Abstract | |
The objective of this study is to measure the level of disclosure in the published financial reports of Jordanian Mergers Company. An index of this criteria was summarized in the form of items which ought to be disclosed. A survey of thirty-two published Jordanian consolidated reports were undertaken. Then the sample reports were analysed to measure the level of disclosure as compared with the items in the index. The study shows the following: 1. The agreement of the respondents regarding the importance of applying the IAS No. 30. 2. There are some difficulties that retard the implementation of the IAS No. 30 in Jordan such as the inefficient of training employees and updating of accounting basis so as to suit Jordanian environment. The researcher suggests the following: 1. The necessity to adjust some items of the IAS No. 30 to suit local laws and legislation. 2. The necessity to use new developed systems to reflect international development. 3. The need to do more research and studies about the application of the international accounting standards in Jordanian companies. | |
Dimensions of Psychological Tension and Stress on An-Najah and Birzuit Faculty Members through the Al-Aqsa Intifada
Dimensions of Psychological Tension and Stress on An-Najah and Birzuit Faculty Members through the Al-Aqsa Intifada |
| Abed Assaf |
| abedassaf@najah.edu |
| Received : 06-11-2001 , Accepted : 09-12-2002 |
| Language: Arabic |
Abstract |
The purpose of this study was first, to find out the psychological tension and stress of the Israeli aggression on the faculty members through Al-Aqsa Intifada. Second, to findout the effect of demographic variables of: (sex, number of children, place of living, being humilated or beaten, living close or far from Israeli hot points, college, sallary, experience, social status, and professional rank) on faculty members psychological stress and tension. The study was conducted on (225) faculty members which represents a random sample of (61.8%) of the target population. A scale of psychological stress was constructed and validated by the researcher and applied to the sample. The results indicate that: 1. The psychological stress and tension on faculty members due to Israeli aggression over all mean was (58.7%) which considerd, in terms of psychological effect, high. 2. There were significant mean defferences among the three subscales of tension and stress. The highest score was on the social domain subscale with (60.4%), the second score of the academic domain subscale was (59%), and the third score of the psycholgocal domain was (3.2%). This could mean that the university faculty members were concerned with their students, and what is happeing on their society more than themselves. 3. There were significant mean differences (0.05) between level of tension and stress among faculty members with respect to demographic variables of: (place of living, being humilated or beaten by Israeli soldiers or not, college, and sallary). 4. There were no significant mean differences (0.05) between level of tension and stress among faculty members according to demographic variables of: (sex, number of children, living close or far from Israeli hot points, experience, social status, and professional rank. |
The Basic Performance Teaching Competencies Of Teachers In The First Basic Educational Stage Which are Needed For Teaching Physical Education
| An-Najah University Journal for Research - Humanities (B) ISSN: 1727-8449 | |
| Volume 17 , Issue 2 , 2003, Pages: 501-538 | |
| |
The Basic Performance Teaching Competencies Of Teachers In The First Basic Educational Stage Which are Needed For Teaching Physical Education | |
| Mohd. Khamis Abu Nimreh | |
| drabunemreh@yahoo.com | |
| Received : 17-03-2003 , Accepted : 05-10-2003 | |
| Language: Arabic | |
Abstract | |
The purpose of this study was to identify the basic performance teaching competencies of teachers in the first Basic Education stage, which are necessary for teaching Physical Education, and to identify the level of basic performance teaching competencies that teachers own from their point of view and their head teacher's point of view। It tended also, to identify if there were significant differences from the teacher's point of view and their head teacher's point of view in teachers basic performance teaching competencies in which are due to sex, experience, educational level, and interaction among these variables. The sample of this study consisted of (243) male and female teachers and (62) school head teachers, they were randomly selected from the population of this study. The researcher used 44- item questionnaire, covering three domains: Teaching planning competencies, teaching implementation competencies, and evaluation competencies. The results of this study revealed that: from the teacher's point of view, they possess (32) basic performance teaching competencies with big degree and (12) competencies with fair degree, and from the head teacher's point of view the teacher in First basic Educational stage possess (1) competency with big degree and (43) competencies with fair degree. The result of this study also showed that from the teacher's point of view and the head teacher's point of view, there were no significant differences in teachers possession basic performance teaching competencies related to sex, experience, educational level and interaction among these variables. However, there were significant differences between the point of view of teachers and head teachers about the teacher's possession of basic performance teaching competencies in all the three domains of the study. In light of the foregoing, the researcher recommended to use the findings (competencies) in educational supervision and in – service training programme, to take more care about teacher's fair competencies; to organize physical education courses for teachers who teach in basic educational stage, and to carry out further studies in depending on close supervision to ensure the availability of those competencies in teachers and in their practices. | |
The Modern Scientific Method or the Selection of Gymnastics beginners
| An-Najah University Journal for Research - Humanities (B) ISSN: 1727-8449 | |
| Volume 13 , Issue 1 , 1999, Pages: | |
| |
The Modern Scientific Method or the Selection of Gymnastics beginners | |
| Imad Abdel-Haq | |
| Received : 14-05-1997 , Accepted : 30-11-1997 | |
| Language: Arabic | |
Abstract | |
The purpose of this study is to investigate the following: To determine the stages of sport selection of Gymnastics beginners. To determine the measurements which are important in the selection of beginners, the tests which are chosen for measurement. According to the survey of related literature to the field of sport selection the researcher found that all researchers agree that the selection in sports have three stages which are: General stage. Specific stage. Long duration stage. Furthermore, the researcher found that each stage has special characteristics, and sport trainers must pay careful attention to different measurements of each stage. These measurements are: Anthrometric, physiological, physical, technical, and psychological measures. | |
The Attitudes of Teachers and Supervisors at the West Bank Governorates Towards Second Secondary Students’ Use of Student Guidebooks
| An-Najah University Journal for Research - Humanities (B) ISSN: 1727-8449 | |
| Volume 16 , Issue 1 , 2002, Pages: 063-086 | |
| |
The Attitudes of Teachers and Supervisors at the West Bank Governorates Towards Second Secondary Students’ Use of Student Guidebooks | |
| Mohammad A. Abdeen | |
| Received : 20-05-2000 , Accepted : 28-04-2001 | |
| Language: Arabic | |
Abstract | |
This study aimed at investigating the attitudes of teachers and supervisors towards the use of student guidebooks by students, and investigating any significant differences between teachers’ and supervisors’ perceptions with regard to job, specialization, sex, and site of the directorate they work at। The population of the study consisted of teachers of the academic twelfth grade and all supervisors of all subject matters at the West Bank. All supervisors and a (12 %) stratified random sample of teachers were chosen for the study. The researcher designed a two-part tool for the study; part one solicited demographic data, and part two contained (30) items on which the respondents were asked to respond in accordance with a four-point Likert scale. Both validity and reliability were determined; the Cronbach Alpha reliability coefficient was (0.92) and the Spearman Brown reliability coefficient was (0.88). Means, percentages, standard deviations, and One-Way Anova were used to analyze the data. The results of the study showed that the teachers and supervisors had negative attitudes towards the use of student guidebooks, and that there were no significant differences in their attitudes with regard to job, specialization, or site of directorate. Meanwhile, there was a significant difference in their attitudes with regard to sex. The results also showed that teachers and supervisors did not overall agree on using student guidebooks by students since their disadvantageous effects on their achievement were apparent. The study recommended that the existing student guidebooks be revised and evaluated, bylaws and regulations regarding their use be made, students be made aware of their disadvantages, and samples of the general examinations questions and key answers be distributed to students and teachers to make use of. | |
The Role of Ibin Al Haitham in Scientific Research
| An-Najah University Journal for Research - Humanities (B) ISSN: 1727-8449 | |
| Volume 16 , Issue 1 , 2002, Pages: 001-021 | |
| |
The Role of Ibin Al Haitham in Scientific Research | |
| Marwan Qadomi | |
| Received : 20-09-1999 , Accepted : 11-11-2000 | |
| Language: Arabic | |
Abstract | |
This research is a thorough study of the role of the outstanding scientist, Ibin Al Haitham, in scientific research. Many scholars attribute the development of scientific research to Islamic scientists, among these was Ibin Al Haitham, who initiated the origins of the modern scientific principles. This study I tried to highlight the role of Arab and Islamic traditions in enriching human culture. This role is exemplified through the scientific canon of Ibin Al Haitham. The study also emphasized the urges of transferring the general heritage and the urges of Ibin Al Haitham in particular.The study, further, includes a presentation of Ibin al Haitham’s scientific mission, his manners, his positions and attitudes and major accomplishments. The study also sought to discover Ibin al haitham’s intellectual attitudes and to locate his basic scientific methods, which depended on induction, syllogism, analogy, preference and the hypothetical method. The study then examined the scientific tools and their importance in scientific research through presenting illustrations from Ibin Al Haitham’s works and commenting on them. This research shows the virtues of this outstanding scientist and his distinguished role in scientific research as he touched on the concepts leading to it. The research then concludes with a call for a revival of the legacy and memory of the Islamic scientists who served humanity and made an important contribution to its heritage. | |
M.R.H. A New Era in Magnetic Head Design
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 3 , 1986, Pages: 085-091 | |
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M.R.H. A New Era in Magnetic Head Design | |
| Mazen R. Husni | |
| Faculty of Engineering, An-Najah University | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The conventional method for reading/writing information from/on a magnetic media (e.g. magnetic tapes in audio and video recorders, computers etc.) uses what is called an inductive head. This consists of several turns of enemelled wire, wound on a specially prepared former as shown in Fig.1. To write (record) information on the magnetic tape, a modulated current signal is injected into the coil. The current treats (induces) a magnetic field at the free ends of the former (poles) which in turn aligns the magnetic particles deposited on the tape, subsequently producing a record of the injected signal. To retrieve the information (i.e. playback the recorded signals) the prerecorded tape is swiped across the poles of the inductive head. In this case the reverse of the write cycle occurs i.e. the magnetic field from the tape influence the former in such a manner as to cause a current flow through the coil having the same form as the recorded signal. A major disadvantage of this type of head is its speed dependence. Since the head senses the rate of change of field, d?/dt (and not the field itself ? its output becomes greatly dependant' on the speed of the tape. Therefore, in tape system, and using an inductive head, it becomes necessary to use some form of electronic equalization in order to correct errors in the signal, resulting from any variations in the speed of the tape. In addition, because of their bulkiness, they become difficult to implement in applications where high packing densities (video tapes) or multi-track system (computer tapes) are used. A new generation of heads have been developed. The heads use the magneto-resistive effect for the read operation and a simplified inductive approach for the write operation. | |
Homogeneous Catalysis of O-Silylation Reactions Using Tris (Acetylacetonato) Cobalt (III)
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 3 , 1986, Pages: 035-430 | |
| |
Homogeneous Catalysis of O-Silylation Reactions Using Tris (Acetylacetonato) Cobalt (III) | |
| Hikmat S.Hilal | |
| Chemistry Department, An-Najah National University, Nablus | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
Tris (acetylacetonato) cobalt (III), (Co(acac)3), has been used to catalyze o-silylation reactions of R 3 Siff (R.z.Et,Et0) with R OH (Rt-Et, i-Pr, t-.Bu and C6Hj-). No reaction has been observed at room temperature, but the reaction is apparently enhanced when carried out at a higher temperature. The rate of the reaction varies with varying the concentration of the saline or the alcohol. Using different types of alcohols and silanes greatly affects the rate of the reaction. The rate of the reaction is affected by varying the concentration of the complex (Co(acaci6)). | |
Base Cleavage of Some Benzyl-Silicon and Tin Compounds in H2O-MeOH-Cyclodextrin Medium
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 4 , 1987, Pages: 20-29 | |
| |
Base Cleavage of Some Benzyl-Silicon and Tin Compounds in H2O-MeOH-Cyclodextrin Medium | |
| Foad M. S. Mahmoud | |
| Department of Chemistry, An-Najah National University, Nablus, West Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The effects of oc - and f3- cyclodextrin (x - ,13- CD's) on the rates of base cleavage of 4 - CNC6 H4 SnMe3 ,3—CIC6 H4 CH2 MMe3 , 4 C1C6 H4 CH2— MMe3 and 3,5 - CL2 C6 H3 CH2 MMe3 with M = Si and Sn have been examined in H 2O - Me0H medium . oc - and 13-CD's accelerate the cleavage of the RSnMe3 compounds (R=3-0106 H4 CH2 , 4-0106 H4 CH2, and 3,5 - 01 2 C6H3 CH2 ) . There is no significant catalysis in the case of the corresponding silicon compounds. | |
Pyridylazo Compounds As Analytical Reagents: A Review
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 4 , 1987, Pages: 30-40 | |
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Pyridylazo Compounds As Analytical Reagents: A Review | |
| Ali Z. Abu-Zuhri | |
| Chemistry Department, Faculty of Science, An-Najah National University, Nablus, West Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
A large number of 2-pyridylazo compounds have been proposed as reagents for the spectrophotometric determination of several metal ions। The application of 2-pyridylazo compounds for the determination of many metal ions is listed and several procedures are described to illustrate the fundamental conditions for the spectrophotometric determination of these metal ions. | |
Spectrophotometric Studies and Analytical Application of Cerium (III) and Thorium (IV) Chelates with Pyridine-2-Aldehyde-2-Pyridylhydrazone (PAPH)
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 4 , 1987, Pages: 41-48 | |
| |
Spectrophotometric Studies and Analytical Application of Cerium (III) and Thorium (IV) Chelates with Pyridine-2-Aldehyde-2-Pyridylhydrazone (PAPH) | |
| Ali Z. Abu Zuhri; Mohammad A. Hannoun | |
| Chemistry Department, An-Najah National University, Nablus, West Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
Ce (III) and Th (IV) reacts with pyridine-2—aldehyde-2—pyridylhydrazone in aqueous solutions containing 50 % ethanol at pH's 7।75 and 8.45 respectively. Beer's law is obeyed over the range 0.0-15.p.g and 0.0-18 ktg of cerium and thorium respectively. The proposed procedure is sensitive, since molar absorptivity is 2.56 x 10 4 and 3.60 X 10 4 1.mol -1 cm-1 for Ce (III) and Th (IV) respectively. The composition and stability of these complexes have been determined. The limitation of this procedure and the effect of other ions have been studied. | |
Kinetic Study of the Complexation of Palladium (II) with 2-(5-Bromo-2-Pyridylazo)-5-Diethylaminophenol
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 4 , 1987, Pages: 12-19 | |
| |
Kinetic Study of the Complexation of Palladium (II) with 2-(5-Bromo-2-Pyridylazo)-5-Diethylaminophenol | |
| Bassem F. Shraydeh; Ali Z. Abu Zuhri | |
| Chemistry Department, Faculty of Science, An-Najah National University, Nablus, West Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The kinetics of the complexation reaction of palladium with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) has been studied in the stability time at the optimum pH of 3.53 in presence of 50% ethanol. The effect of ionic strength and temperature on the reaction rate were reported. A mechanism has been postulated and the stability constants of the individual steps were determined. The Arrhenius and thermodynamic parameters were evaluated and discussed. | |
The Development of Rotylenchulus Reniformis and Tylenchulus Semipenetrans, on Grape Roots
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 4 , 1987, Pages: 01-11 | |
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The Development of Rotylenchulus Reniformis and Tylenchulus Semipenetrans, on Grape Roots | |
| S.A. Sultan | |
| Agricultural Department, An-Najah National University, Nablus | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The results showed that the average numbers of eggs per an egg mass of R. Reniformis and T. Semipenetrans were 84 and 36 eggs, and the eggs hatched after 6 and 7 days respectively. The durations of the life cycle were 30 and 41 days, respectively. Life cycles were divided into migratory and sedentary phases. The migratory phase (soil phase) of R. reniformis was not parasitic and lasted for about 21 days; while that of T. semipenetrans was parasitic and lasted for about 31 days. The sedentary phase of both nematodes was parasitic and lasted for about 9 and 10 days for R. reniformis and T. semipenetrans respectively. Only the young females of R. reniformis were the infective stages; while all larval stages and young females of T. semipenetrans were able to penetrate root tissues. | |
The Use of Transition-Metal Complexes as Catalysts in Tertiary Silanes Reactions with Unsaturated Organic Compounds and Alcohol: A Review
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 5 , 1988, Pages: 50-78 | |
| |
The Use of Transition-Metal Complexes as Catalysts in Tertiary Silanes Reactions with Unsaturated Organic Compounds and Alcohol: A Review | |
| H. Hilal | |
| Chemistry Department, An-Najah University, Nablus | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: Arabic | |
Abstract | |
This review deals with reactions of tertiary silanes R3SiH with unsaturated organic compounds (e।g. alkanes, dienes, alkynes, ketones, and aldehydes) and with alcohols R'OH, using transition- metal complexes as catalysts. Due to the bulk of relevant literature, special attention has been given to mechanistic aspects of the roles of the catalyst in the reaction. Main references which appeared in the period l960-1986, have been reviewed. | |
Distribution of ABO Blood Groups and the Rh factor in Palestinians Living in the Northern Part of the West Bank
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 5 , 1988, Pages: 35-41 | |
| |
Distribution of ABO Blood Groups and the Rh factor in Palestinians Living in the Northern Part of the West Bank | |
| M.S. Ali-Shtayeh, A. H. Hamdan, Yahya R. Faydi | |
| An-Najah National University, Nablus | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: Arabic | |
Abstract | |
The ABO blood groups and the Rh factor were determined for 1308 Palestinian subjects living in the northern part of the West Bank, using Anti-A, Anti-B, and Anti-D sera. Group 0 was the most frequent blood group in these subjects (46%) followed by group A (36.7%), group B (137.) and group AB (3.7%). Of the examined subjects 90.4% were Rh and 66.5% of these were females. | |
The Role of Solvent on the Kinetics and Mechanism of the Hydrolysis of Salicylidene Benzoyl Hydrazone
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 5 , 1988, Pages: 28-34 | |
| |
The Role of Solvent on the Kinetics and Mechanism of the Hydrolysis of Salicylidene Benzoyl Hydrazone | |
| Maher Abu-Eid | |
| Chemistry Department, An-Najah National University, Nablus | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The effect of various solvents on the kinetics and mechanism of the hydrolysis of Salicylidene Benzoyl hydrazone (SBH) has been studied at five different temperatures (17-45 C) using U।V. and visible spectrophotometry. In both protic and aprotic solvents, the hydrolysis rates follow first order kinetics. The role of solvent on the reaction rate, thermodynamic parameters and mechanism have been reported and discussed. | |
Explanation of the Shape of Calibration Graphs Obtained for Mercury, Zinc and Copper in Stream Water Samples
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 5 , 1988, Pages: 01-11 | |
| |
Explanation of the Shape of Calibration Graphs Obtained for Mercury, Zinc and Copper in Stream Water Samples | |
| Radi Salim; Ismat Shakhshier | |
| Chemistry Department, An-Najah National University, Nablus | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
Calibration graphs have been obtained for mercury, zinc and copper ions using buffered (pH 7।4) stream water and centrifuged stream water samples. Two hypothesis explaining the shape of the obtained calibration graphs have been suggested; one refers the shape to the adsorption of-trace elements on the suspended particles and on the container surfaces, the other hypotheses refers the shape of calibration graphs to the presence of chemical interference. The strength of the two hypotheses has been compared. The effect of time on the shape of the calibration graphs has also been investigated. | |
Short Communication: Solvent Effects on ? Values of the Hammett Equation for the Hydrolysis of Benzylidene Benzoylhydrazones
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |||||||||||||
| Volume 6 , 1989, Pages: 51-58 | |||||||||||||
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| Mohammed A. Al-Nuri | |||||||||||||
| Associate Prof., Department of Chemistry, Faculty of Science, An-Najah National University | |||||||||||||
| Received : 00-00-0000 , Accepted : 00-00-0000 | |||||||||||||
| Language: English | |||||||||||||
Abstract | |||||||||||||
The effect of solvents on ? values of the Hammett equation which characterizes the hydrolysis of Benzylidene Benzoylhydrazone (BBH) and its derivatives (m—NO2 m—CH3, m—OCH3 and m—Cl), have been studied with four solvents (MeOH, Et0H (1), n—BuOH, and DMSO) by U।V. — spectrophotometry. The effects of solvents on ? values, one of the Hammett equation parameters, have been reported and discussed. | |||||||||||||
Short Communication: Synthesis of 2-(Chiral Alkyl) Oxazolines
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |||||||||||||
| Volume 6 , 1989, Pages: 43-49 | |||||||||||||
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| Rajah Abu El-Halawa | |||||||||||||
| Assistant Prof., Department of Chemistry, Faculty of Science, An-Najah National University | |||||||||||||
| Received : 00-00-0000 , Accepted : 00-00-0000 | |||||||||||||
| Language: English | |||||||||||||
Abstract | |||||||||||||
A modified Vorbruggen method has been used to prepare 2 - ( chiral alkyl ) oxazoline with phenyl and aminoacid residue। Other methods of preparation have been tested. | |||||||||||||
Short Communication: Addition of Bis (methylthio) acetylene to Nitrilium Salts
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 6 , 1989, Pages: 37-42 | |
| |
Short Communication: Addition of Bis (methylthio) acetylene to Nitrilium Salts | |
| Rajab Abu El-Halawa, J.C. Jochims | |
| 1 Assistant Prof. Department of Chemistry, Faculty of Science, An-Najah National University; 2 Prof. Dr. Department of Chemistry, Konstanz University, West Germany | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
Azaallenium salt 7 was isolated at low temperature by the addition of bis (methylthio) acetylene to nitrilium salts। The isolated azaallenium salt 7 was rearranged to afford the 1:1 heterocyclic adduct 8. A detailed mechanism is discussed. | |
Kinetics and Mechanism of the Hydrolysis of Benzylidene Benzoylhyd - Razone Derivatives
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 6 , 1989, Pages: 23-33 | |
| |
Kinetics and Mechanism of the Hydrolysis of Benzylidene Benzoylhyd - Razone Derivatives | |
| Maher A. Abu-Aid, Ali Z. Abu-Zuhri, Foad M. Mahmoud, Bassem F. Shraydeh | |
| 1 Present address : Department of Chemistry, Faculty of Science, United Arab Emirates University, Al-Ain, UAE; 2 Assistant Prof., Department of Chemistry, Faculty of Science, An-Najah National University | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The kinetics and mechanism of hydrolysis of a series of substituted benzylidene benzoylhydrazones (X — BBH) have been studied at five different temperatures in the range 25 — 45°c by U। V. -visible spectrophotometry. The hydrolysis reactions were found to follow first - order kinetics. A mechanism has been postulated in which the attack of water on the protonated substrate is subject to general base catalysis. This mechanism has been supported by the effect of anion concentration of buffer, at constant pH, on the observed rate constant. The Bronsted ?-value for the hydrolysis reaction is 0.73. Hammett correlations, Arrhenius and thermodynamic parameters have been evaluated and discussed. The pKa values for the conjugate acids for benzylidene benzoylhydrazones derivatives (X - BBH) have been determined. | |
Free Odd Periodic Actions on the Solid Klein Bottle
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |||||||||||||
| Volume 6 , 1989, Pages: 17-21 | |||||||||||||
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| Fawas M. Abudiak | |||||||||||||
| Assistant Prof., Department of Mathematics, Faculty of Science, An-Najah National University | |||||||||||||
| Received : 00-00-0000 , Accepted : 00-00-0000 | |||||||||||||
| Language: English | |||||||||||||
Abstract | |||||||||||||
The cyclic actions of odd period and empty fixed point set are studied on the solid Klein Bottle K। It is shown that up to weak equivalence there is only one such action. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D497 | |||||||||||||
Mathematical Analysis of a Vibrating Rigid Water Tank
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |||||||||||||
| Volume 6 , 1989, Pages: 07-16 | |||||||||||||
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| Amin H. Helou | |||||||||||||
| Assistant Prof, Department of Civil Engineering, Faculty of Engineering, An-Najah National University. | |||||||||||||
| Received : 00-00-0000 , Accepted : 00-00-0000 | |||||||||||||
| Language: English | |||||||||||||
Abstract | |||||||||||||
The hydrodynamic pressure distribution on the wall of a vibrating water tank is traditionally expressed as a summation of two components; an impulsive component and a convective one obtained by separating the potential function into two parts। This requires solving Laplace's equation in two stages each with a separate set of boundary conditions. The following is one step systematic solution to the problem in a frame moving with the tank. It proves to be simple, compact and could lead to the impulsive, frequency independent and the convective, frequency dependent components of pressure at the water tank wall. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D496 | |||||||||||||
Polarographic Study of Some Arylidene-2-Pyridylhydrazones
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 7 , 1992, Pages: 29-34 | |
| |
Polarographic Study of Some Arylidene-2-Pyridylhydrazones | |
| Ali Z. Abu-Zuhri, Mohammed A. Al-Nuri, Mohammed A. Hannoun, and Jamal S. Shalabi | |
| Present address: Department of Chemistry, Faculty of Science, United Arab Emirates University, Al-Ain, UAE; This work is taken from the M. Sc. Thesis of Jamal S. Shalabi Department of Chemistry, Faculty of Science, An-Najah National University - Nablus. | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The polarographic behaviors of some arylidene-2-pyridyl hydrazones have been studied in aqueous Britton - Robinson buffer solution containing 40% ethanol using DC polarographic technique। In the pH range 1.9 - 6.4 the observed single irreversible 4 - electron reduction wave is attributed to the splitting of the N - N bond and saturation of C = N centre. All compounds studied are polarographically inactive in alkaline medium. The effect of pH on the limiting current and E 112 as well as the reduction mechanism and the effect of substituent's are discussed and compared with similar compounds. The kinetic parameters of the electrode reaction have been calculated. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D505 | |
On Semilocal Rings And Finitely Generated Projective Modules Rings
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 7 , 1992, Pages: 15-22 | |
| |
On Semilocal Rings And Finitely Generated Projective Modules | |
| Ali Abdel-Mohsin | |
| Mathematics Department, Faculty of Science, An-Najah National University-Nablus | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
We establish the equivalence between the existence of a cyclic projective right C-module P such that P/J (BP) is semisimple and BP is finitely generated (B = End (Pc)) and the existence of an idempotent element e in c such that trace (Pc) is finitely generated (and equals CeC) and C/S is semisimple where S is the intersection of all maximal left ideals of C not containing the trace ideal of Pc। | |
Short Communication: Trace Metal Pollution Levels in Some Springs in Nablus
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 7 , 1992, Pages: 07-21 | |
| |
Short Communication: Trace Metal Pollution Levels in Some Springs in Nablus | |
| R. Salim, Z. Qattawi, H. Hilal, I. Amer | |
| Chemistry Department, An-Najah N. University, Nablus-Want Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: Arabic | |
Abstract | |
Trace metal concentrations in spring-water of a number of springs around Nablus have been determined। Samples of these waters were taken during November and December of 1985, acidefied with HNO3 to pH 1.5 and then analyzed for their content of lead, copper, zinc, nickel, iron, manganese, magnesium, calcium and hydrogen ions. The method of analysis used was flame atomic absorption spectroscopy with an acetylene -air flame. Hydrogen ion concentration was measured using pH-meter The results showed very low concentrations (well below the safe limits) of lead copper, zinc, nickel, iron and manganese. The pH of the samples studied was within the allowed range. High concentrations of magnesium were found in many samples ; but not high enough to cause a risk. The concentration of calcium in almost all the samples studied was very high and higher than the allowed limit. The use of these waters is harmful to industry and house-hold equipment and probably has an influence in developing kidney stones in persons having the potential for developing kidney stones. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D508 | |
A Study of a Flexible Submerged Cylindrical Tank Subject to Lateral Ground Excitation
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 8 , 1994, Pages: 138-156 | |
| |
A Study of a Flexible Submerged Cylindrical Tank Subject to Lateral Ground Excitation | |
| Amin H. Helou | |
| 1 Engineering Department, An-Najah N. University, Nablus, West-Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
In a submerged rigid oil storage tank it is possible to evaluate the internal and external hydrodynamic forces separately. Internally the forces are due to internal waves generated at the oil-water interface. Externally, they are due to radiated waves. When such a tank is made of steel, at it is usually the case, the internal and external forces get coupled through the flexibility of the shell, hence their solutions become inseparable. The following is an analytical treatment for the case of a flexible tank it expands the solution of the rigid tank to include the shell flexibility effect. The submerged tank is assumed to be subject to a harmonic lateral ground excitation. | |
http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D518 | |
A New Method for the Preparation of Poly (Silmethylene) as a Precursor for Silicon Carbide Fibers
A New Method for the Preparation of Poly (Silmethylene) as a Precursor for Silicon Carbide Fibers |
| Maher Abu-Eid |
| 1 Chemistry Department, An-Najah N. University Nablus, West-Bank |
| Received : 00-00-0000 , Accepted : 00-00-0000 |
| Language: English |
Abstract |
Poly(silmethylene) has been prepared form 3-chloropropyltrichlorosilane। The structure of poly(silmethylene) was investigated by IR and NMR spectroscopy. The pyrolysis of the polymer was studied by Thermal Gravimetric Analysis (TGA) and was found to give 70% ceramic yield after pyrolysis temp of 900°C. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D514 |
Spectrophotometric Determination of Uranium with Di-2-pyridyl Ketone Benzoylhydrazone
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 8 , 1994, Pages: 072-082 | |
| |
Spectrophotometric Determination of Uranium with Di-2-pyridyl Ketone Benzoylhydrazone | |
| Maher Abu-Eid, Nidal A. Zatar, Mohammad A. Al-Nuri, Mustafa Khamis, Mohammad Hannoun, Shukri Khalaf | |
| 1,2,3,5,6 Chemistry Department, Au-Najah N. University. Nablus-West Bank; 4 College of Science and Technology, Abu-Dis, Wes Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
A method for the spectrophotometric determination of uranium (VI) by complexation with Di-2-pyridyl ketone benzoylhydrazone (DPKBH) in 50% (v/v) ethanolic solution is described। Uranium (VI) forms a 1:2 complex with DPKBH. The complex has a maximum absorbance at 377 um. Beer's law is obeyed over the range 0, 2 - 12 ug.m1' 1. The effect of pH, excess reagent, percentage of ethanol (v/v), stability of the complex and the tolerance limit of many metal ions and common anions have been reported. The method has been applied to the determination of uranium in Egyptian monazite sand. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D513 | |
Kinetics and Mechanism of Oxidation of Cobalt (II) by Iron (III) in the Presence of 1,10 Phenanthroline
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 8 , 1994, Pages: 062-071 | |
| |
Kinetics and Mechanism of Oxidation of Cobalt (II) by Iron (III) in the Presence of 1,10 Phenanthroline | |
| Bassem F. Shraydeh | |
| 1 Chemistry Department, An-Najah N. University, Nablus-West Bank. | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The kinetics of oxidation of cobalt (II) by iron (III) in the presence of 1, 10 phenanthroline has been investigated spectrophotometrically। Hydrogen ions exhibited an inhibitory effect on the rate of the reaction while 1,10 phenanthroline showed an accelerating effect The order with respect to iron (III) was found to be unity. On the other hand, the order with respect to cobalt varies with its concentration being 0.3+ 0.004 at high concentration and 0.791-0.019 at low concentrations. A plausible mechanism was postulated and a rate law was derived that accounted for the various experimental results obtained. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D512 | |
?, ?- Unsaturated Lactone-Nitrone Cycloadditions: a Route to the Synthesis of (±)–Tussilagin
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 8 , 1994, Pages: 049-061 | |
| |
?, ?- Unsaturated Lactone-Nitrone Cycloadditions: a Route to the Synthesis of (±)–Tussilagin | |
| Mohammed A. Al-Nuri | |
| 1 Chemistry Department, An-Najah N. University, Nablus, West-Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
Reaction of nitrone (V with a, f1 -unsaturated lactone C।4) resulted in the isolation of a single adduct (7). The observed high regiochemical control has encouraged further explorations of natural product synthesis. A route to the synthesis of an interesting member of Pyrrolizidine- Alkaloid family; (±) -Tussilagin 90/ has been described. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D511 | |
Polymerization of 4-Methylpentene- 1-by Using the MgCl2|Eb|TiCl4|Al(iBu)3 Catalyst System 2. Active Centre Determination
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 8 , 1994, Pages: 024-048 | |
| |
Polymerization of 4-Methylpentene- 1-by Using the MgCl2|Eb|TiCl4|Al(iBu)3 Catalyst System 2. Active Centre Determination | |
| M. A. Abu-Eid, P. J. Tait | |
| 1 Chemistry Department, An-Najah N. University, Nablus-Want Bank; 2 UMIST, Chemistry Department, Sackville Street Manchester, U.K. | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
In the polymerization of 4-methylpentene- 1- by using the MgC12 IEB I TiCL4 IA1(iBu)3 catalyst systems, the effect of catalyst composition on the number of active centres, propagation rate constant, rates of transfer and rate constants for transfer with respect to adsorbed aluminum alkyl and monomer have been reported। The role of aluminum alkyl on the rate of polymerization and the effect of ethyl benzoate on the number of active centres and rate of transfer with respect to aluminum alkyl have been discussed. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D510 | |
Effect of Root and Foliar Treatment of Marrow Plants with Copper Solutions on the Growth of Plants and on its Uptake of Copper and the Distribution of
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 8 , 1994, Pages: 020-033 | |
| |
Effect of Root and Foliar Treatment of Marrow Plants with Copper Solutions on the Growth of Plants and on its Uptake of Copper and the Distribution of this Uptake in the Various Parts of Plant (Roots, Stem, Leaves, and Fruits) | |
| Radi Dauod, M. M. Al-Subu, A. Atallah | |
| Chemistry Department, An-Najah N., University, Nablus, West-Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: Arabic | |
Abstract | |
In this study we have measured the effect of root and foliar treatments of marrow plants with 03 - 7।3 ppm copper solutions. Both types of treatment resulted in a substantial inhibition of growth of plant. This inhibition was compared for the various parts of plant (roots, stern, leaves and fruits) and for the two types of treatment. The concentration and the total content of copper in the various parts of treated plants were measured and compared with each other. The percentage of copper taken by plant from the total amount of copper added during the treatment of marrow plants was found to be very small. This percentage was found to be very small. This percentage was found higher in foliar - treated plants than in root - treated plants. It was also higher front dilute copper solutions than front more concentrated copper solutions. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D522 | |
Polymerization of 4-Methylpentene -1- by the MgCl2|Eb|TiCl4|Al(iBu)3 Catalyst System 1. Kinetic Investigations
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 8 , 1994, Pages: 007-023 | |
| |
Polymerization of 4-Methylpentene -1- by the MgCl2|Eb|TiCl4|Al(iBu)3 Catalyst System 1. Kinetic Investigations | |
| M. A. Abu-Eid, P. J. Tait | |
| 1 Chemistry Department, An-Najah N. University, Nablus-Want Bank; 2 UMIST, Chemistry Department, Sackville Street Manchester, U.K. | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The kinetics of the polymerization of 4-methylpentcne-1- with the MgC12|EB|Ticl4|Al(iBu)3 catalyst systems have been investigated। The conditions and requirements to achieve the highest activity and stereospecificity of the MgC12-supported catalyst systems were discussed. Moreover, the role of aluminum alkyl and ethyl benzoate on the activity and stereo-regularity of the polymers have been reported. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D509 | |
Quality of Underground Water in the West Bank and its Suitability for Irrigation
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 8 , 1994, Pages: 007-019 | |
| |
Quality of Underground Water in the West Bank and its Suitability for Irrigation | |
| M. S. Ali Shtayeh, Nihayeh Abu Hijleh | |
| Biology Department, An-Najah N., University, Nablus, West-Bank | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: Arabic | |
Abstract | |
Chemical analysis was carried out on underground water samples taken from 192 wells, distributed throughout the West Bank of Jordan। The samples were collected twice; in 1982 and 1987. Water samples were classified on the basis of their salinity, sodium concentration, salinity hazard - sodium hazard, and suitability for irrigation. Water samples from different wells in different localities differed largely in their qualities. The results also showed a decline with time in water quality in the samples examined, especially in Jericho and the Jordan valley. The implications of the results on agriculture in the West Bank are also discussed. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D521 | |
Microbiological Screening of the Environments of Two Hospitals in Nablus
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 9 , 1995, Pages: 100-107 | |
| |
Microbiological Screening of the Environments of Two Hospitals in Nablus | |
| Yahya Faydi, Abdel Hadi Hamdan, Mohammed Saleem Ali Shtayeh, Suleiman Al-Khalil | |
| 1 Department of Medical Laboratory Sciences; 2 Department of Biological Sciences, An-Najah University | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
Both blood agar and MacConkey plates were used for the isolation of bacteria from the environments of two hospitals in Nablus। Pseudomonas aeruginosa, Escherichia coli and Staphylococci were isolated from saline solution kept in glass bottles for washing and cleansing wounds, suction machines, respirators, endotracheal tubings, oxygen pumps and sinks. Alcaligenes odorans was isolated from the suction machines and Dettol solution. Aeromonas species were isolated from deionized water and sinks, the implications of these findings were also discussed. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D530 | |
Microbiological Screening of the Environments of Two Hospitals in Nablus
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 9 , 1995, Pages: 100-107 | |
| |
Microbiological Screening of the Environments of Two Hospitals in Nablus | |
| Yahya Faydi, Abdel Hadi Hamdan, Mohammed Saleem Ali Shtayeh, Suleiman Al-Khalil | |
| 1 Department of Medical Laboratory Sciences; 2 Department of Biological Sciences, An-Najah University | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
Both blood agar and MacConkey plates were used for the isolation of bacteria from the environments of two hospitals in Nablus। Pseudomonas aeruginosa, Escherichia coli and Staphylococci were isolated from saline solution kept in glass bottles for washing and cleansing wounds, suction machines, respirators, endotracheal tubings, oxygen pumps and sinks. Alcaligenes odorans was isolated from the suction machines and Dettol solution. Aeromonas species were isolated from deionized water and sinks, the implications of these findings were also discussed. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D530 | |
A Historical Review of the Land Tenure and Registration System in Palestine
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 9 , 1995, Pages: 086-099 | |
| |
A Historical Review of the Land Tenure and Registration System in Palestine | |
| Najeh S. Tamim | |
| Faculty of Engineering, An-Najah National University | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
Due to its strategic location, Palestine has played a significant role in world politics। These politics, in turn, have been major influencing factors in the culture and history of Palestine. The land in Palestine has been, and still is, the central issue in the Palestinian - Israeli conflict; each claiming sovereignty over it. This paper will briefly outline the evolution of the land tenure and registration system in Palestine from the early days of Islam up to the present. A future methodology that may improve the current system will be proposed at the end of the paper. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D529 | |
The Effect of Different Seed Treatments on Seed Germination of Gundelia tournefortii Seeds
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 9 , 1995, Pages: 058-072 | |
| |
The Effect of Different Seed Treatments on Seed Germination of Gundelia tournefortii Seeds | |
| Hassan Abu-Qaoud, Rae'd Alkoni | |
| 1 Department of plant Production and Protection, Faculty of Agriculture, An- Najah N. University; 2 Palestinian Agriculture Relief Committees | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: Arabic | |
Abstract | |
The effects of different seed treatments on the germination percentage and rate of Gundelia tournefortii seeds were studied. Seeds were collected from Jamaeen area near Nablus city. The normal healthy seeds were separated from small shrinked seed and used in the different trails. Three experiments were conducted in which the effect of presoaking, scarification and stratification on the seed germination was investigated. The higher germination percentage (48%) was obtained when the outer seed coat was removed after the seeds were presoaked in water. This percentage was highly significant than other results obtained with the other treatments. The use of concentrated sulfuric acid for 15 and 30 minutes to tender the seed coat didn't increase the germination percentage of the treated seeds over that of the control Similar effects was also exhibited when the seeds were soaked in hot water for different intervals. Cold stratification at 4-5' didn't significantly increase the germination percentage of the seeds. | |
Topological and Chemical Thresholds in Glasses of the Ge-Sb-S System
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 9 , 1995, Pages: 049-057 | |
| |
Topological and Chemical Thresholds in Glasses of the Ge-Sb-S System | |
| G. Saffarini | |
| Physics Department, An-Najah National University | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
The variation of the molar volume, V, and the glass transition temperature, TQ with the average coordination number, m, for twenty-three glass compositions. belonging to the Ge15SbxS85-x and Ge20SbxS80-x families of the Ge-Sb-S system, is reported and discussed. The V-m dependence for the Ge15SbxS85-x family shows a minimum in V at m=2.4 which is attributed to the floppy-to-rigid transition in network glasses. For both families of the glasses examined, the V-m and Tg-m dependences show peaks at m=2.52 for Ge15SbxS85-x and at m=2.56 for Ge20SbxS80-x, corresponding to the respective stoichiometric composition for each family. These features are found to be consistent with topological and chemically ordered covalent network models proposed for the structure of these glasses. | |
http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D526 | |
Decay of the Charged Harmonic Oscillator
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 9 , 1995, Pages: 030-048 | |
| |
Decay of the Charged Harmonic Oscillator | |
| Sami M. Al-Jaber, Walter C. Henneberger | |
| 1 Department of Physics, An-Najah National University; 2 Department of Physics and Southern Illinois University Molecular Science Program, Southern Illinois University, Carbondale, Illinois U.S.A. | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
We apply the van Kampen-Steinwedel principal axis transformation to the problem of finding time-dependent probability distributions for decaying states of the harmonic oscillator। The result lends itself easily to computer simulation. Results for the decay of levels 1,2, and 15 are given. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D525 | |
The Effect of Monensin, Lasalocid and a Monensin/Lasalocid Rotation of Fungal Population in the Rumen of Concentrate and Roughage Fed Steers
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 10 , 1996, Pages: 108-123 | |
| |
The Effect of Monensin, Lasalocid and a Monensin/Lasalocid Rotation of Fungal Population in the Rumen of Concentrate and Roughage Fed Steers | |
| Jamal Abo-Omar | |
| Assistant Professor, Dept of Animal Production, An-Najah N. University, Nablus | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
Two studies using three ruminally cannulated beef steers in the first one fed a roughage diet (98% chopped alfalfa at maintenance) and 12 beef steers in the second fed limited ration (85% adlib intake) composed of 90% concentrate diet (80% cracked corn, 10% soybean meal), and 10% chopped alfalfa were allotted to treatment groups receiving a supplement of either monensin / tylan (m27।5 ppm / 11 ppm), lasalocid (33 ppm) or a daily rotation of the two ionophores to examine the effect of the ionophores on rumen population of anaerobic fungi over time and the relationship between fungal numbers and methane production. In the first study, nylon bags containing leaf blades of 5mm length were incubated for 24 hrs in the rumen. Samples were counted on days 0, 1, 3, 5, 7, 11, 14, 16, 21, 22, 23, 24, and 28 Fungi sporangia on blades were counted microscopically (00x). Study 2, steers were assigned as above and after methane production was measured using indirect respiration calorimetry, samples of rumen contents were collected by stomach tube pretreatment, and on days 2, S, 16, and 45 after initiation of ionophore treatments. Differences of fungi numbers over time and between treatments were not significant, yet, there was a trend of initial ionophore inhibition on fungi with limited evidence of adaptation over time there was a positive correlation (P <> http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D538 | |
Indoor Radon Concentration Measurements At Hebron University Campus :A Case Study
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 10 , 1996, Pages: 092-107 | |
| |
Indoor Radon Concentration Measurements At Hebron University Campus :A Case Study | |
| Fakhri I. Hasan | |
| Associate Professor, Physics Department, Hebron University, Hebron | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
TASTRAK, a solid state nuclear track detector has been used to measure indoor radon concentrations at Hebron University। Fifty- four radon pot detectors were mounted in the four university buildings. It was found that the radon concentrations vary considerably from about 1 Bq/m 3 to 250 Bq/m3 The average radon concentrations vary from 20.5 Bq/m3 in the Main Building to 41.3 Bq/m3 in the Agriculture Building. The average radon concentration in the four buildings is found to be 29.8 Bq/m 3. This leads to an average effective dose equivalent of 1.49 mSvly. This dose is slightly higher than the global value of 1.3 mSv/y. Elevated radon concentrations have been found in few rooms. However, these concentrations are well below the action level of 150 Bq/m3. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D537 | |
Evaluation of the Stiffness Matrix of an Indeterminate Truss Using Minimization Techniques
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 10 , 1996, Pages: 083-091 | |
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Evaluation of the Stiffness Matrix of an Indeterminate Truss Using Minimization Techniques | |
| Samir H. Helou | |
| Assistant Professor, Civil Engineering, An-Najah National University, Nablus. | |
| Received : 00-00-0000 , Accepted : 00-00-0000 | |
| Language: English | |
Abstract | |
For an existing reinforced concrete or steel structure the evaluation of the stiffness matrix may be hampered by certain physical limitations such as material deterioration resulting from prolonged use an adverse or in a corrosive environment। The following is a method that allows the determination of the member stiffness of an indeterminate truss through a minimization technique of a properly constructed Error Function. Thus exact sectional and material properties do not have to be known a priori. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D536 | |
Some Remarks on Closure and Strong Continuity
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 12 , 1998, Pages: 07-20 | |
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Some Remarks on Closure and Strong Continuity | |
| Mohammad Saleh | |
| Department of Mathematics, Birzeit University, Birzeit, Palestine | |
| Received : 13-12-1997 , Accepted : 27-10-1998 | |
| Language: English | |
Abstract | |
Noire studied several properties of weak continuity in Proc। Amer. Math. Soc. 46(1), 120-124. In this paper it is shown that similar to most of the results of the above paper still hold for closure and strong continuity. Example 2 is a counterexample to a corollary to Theorem 6 of Long and Herrington. Theorem 12 of our paper is a sharper result to Theorem 5 of Noire. Several decomposition theorems of closure and strong continuity are obtained. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D546 | |
Adsorptive Cathodic Stripping Voltammetric Studies of Emodin
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 13 , 1999, Pages: 57-66 | |
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Adsorptive Cathodic Stripping Voltammetric Studies of Emodin | |
| Mohammad A. Hannoun | |
| Faculty of Pharmacy, An- Najah National University- Nablus, West Bank (Palestine) | |
| Received : 22-09-1998 , Accepted : 31-08-1999 | |
| Language: English | |
Abstract | |
A differential pulse cathodic stripping voltammetric (DP-CSV) method for determination of emodin in Britton- Robinson buffer (pH2) at a hanging mercury drop electrode (HMIDE) is described। The method is based on measuring the reductive peak height at —0.25V vs. Ag/AgCl reference electrode. The linear relationship between the peak current and emodin concentration allowed the voltarnmetric determination of emodin over a wide concentration range 1.0 X 10-2 —2.5 X10-6 M, with a relative standard deviation of 3.3% (10 determinations at 1 X 10-2 M). Adsorption of emodin at HMDE enabled a detection limit of 2X10-1°M after 3 min accumulation at 0.0V. The applicability of the suggested method was found to be suitable for the determination of emodin in roots, stems and leaves of Rumex cyprius plant. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D545 | |
Some Propositions, Quantified Assertions and their Uses in Computer Hardwadre Design
Some Propositions, Quantified Assertions and their Uses in Computer Hardwadre Design |
| Maher A. Nabulsi |
| Dept. of Math & Computer Science, College of Science. Al-Zaytoonah Jordanian University, Amman, Jordan. |
| Received : 03-04-2000 , Accepted : 13-03-2001 |
| Language: English |
Abstract |
Mathematics and computer science are closely linked with each other, and in many respects, the functions of computer related elements might be interpreted using mathematical approaches। In this paper the strong correlation that exist between computer software and hardware elements (logic devices, digital circuits and logical processing) and discrete mathematics (propositions and quantified assertions) will be demonstrated. This will pave the way for a better understanding of the operations of basic computer circuits and lay the foundation for developing new computer related algorithms. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D220 |
Simplified Cost Models for Building Construction
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 14 , 2000, Pages: 169-187 | |
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Simplified Cost Models for Building Construction | |
| Nabil Dmaidi | |
| Department of Civil Engineering, Faculty of Engineering, An-Najah National University, Nablus, Palestine | |
| Received : 05-07-2000 , Accepted : 13-03-2001 | |
| Language: English | |
Abstract | |
This paper presents simple cost models that contain small number of items that will be used for estimating costs of contracts। Twenty-eight contracts that contain large number of items were used in this study, for the development of these models. Cost significant philosophy was used as an approach to develop the models. This study has shown that about 80% of the total cost of a project are contained within 20% of the items. These items are called cost significant items. Each item has a value greater or equal to the mean item value. These models can be used only for multi-story residential buildings. The developed construction cost model contains about 25% of the items while the developed finishing cost model contains about 23% of the items. The expected accuracy for both cost models is within + 5% and the achieved accuracy is within + 7%. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D221 | |
Inversion of DNA Sequences as a Result of Recombination between Site-Specific Recombination between Site-Specific Recombination Sequences from Colicin
| An-Najah University Journal for Research - Natural Sciences (A) ISSN: 1727-2114 | |
| Volume 14 , 2000, Pages: 105-116 | |
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Inversion of DNA Sequences as a Result of Recombination between Site-Specific Recombination between Site-Specific Recombination Sequences from Colicin Familty Plasmids | |
| Sami A. Yaish | |
| Department of Biological Sciences, Faculty of Science, An-Najah National University, Nablus, Palestine. | |
| Received : 20-10-1999 , Accepted : 29-11-2000 | |
| Language: English | |
Abstract | |
Some naturally occurring plasmids like ColEl and ColK have been found to harbor site-specific recombination sequences, the core regions of such sequences have shown 82% homology when so aligned। The high degree of homology was the basis for testing the possibility of recombination between them. The sequences were cloned in the vector pUC18 in opposite orientation and introduced into E.coli cells and the analysis of the DNA harvested from the transformed cells showed that the sequences had undergone recombination, such recombination, such recombination was of the site-specific mode. No sequence deletion was detected, as was the case with such sequences when they were in the same orientation, Interestingly the event of recombination in this case resulted in the inversion of the region located between the recombination sites of the two cloned fragments. http://www.najah.edu/index.php?page=2149&l=en&extra=%26id%3D217 | |