Utility of (2,4-dioxo-1,4-dihydro-2H-quinazolin-3-yl)-acetic acid hydrazide in the synthesis of some heterocyclic nitrogen compounds

An efficient synthesis of (2,4-dioxo-1,4-dihydro-2H-quinazolin-3-yl)-acetic acid hydrazide (3) has been achieved and described. The obtained hydrazide (3) was used in building of some interesting heterocycles such as, triazole, oxadiazole, pyrazole, phthalazine, and indol-2-one rings at position 3. The structures of the obtained compounds were confirmed by IR, 1H NMR, 13C NMR, MS spectral and elemental analysis

The Effectiveness of a Suggested Program on Improving Listening Comprehension Achievement through Aural Authentic Materials for Al Aqsa University English Majors

This study investigates the effectiveness of a suggested program on improving listening comprehension achievement through aural authentic materials for English language majors at Al Aqsa university. The researcher uses one major tool which is the listening achievement test. Other steps were followed by the researcher to collect the required data, like preparing a list of skills, a questionnaire, a diagnostic test, and a suggested program. A list was used to determine the micro-skills of listening comprehension that should be included in English listening courses for university level, then it was used to determine the most important and missing skills that should be taught. The researcher asked the lecturers of English listening courses to choose five skills to be improved after the consultation of specialists and educationalists who agreed that listening skills are time consuming, more to the point, tackling five skills is satisfying in a suggested program that include twenty four lessons with various activities and techniques. The questionnaire was used to ask the students to choose the most important and missing skills of listening comprehension that affect their academic improvement, then a diagnostic test was applied to see how reliable students were in response to the questionnaire. There was a high matching among the lecturers, students and diagnostic test's results on the chosen skills. The researcher chose the second level of English majors at al Aqsa university. The study sample was 30 female students, enrolled in the first semester of the academic year 2009-2010. The study sample represents the experimental group who was pre-tested before the implementation of the program. The suggested program was taught, then a post test was applied to see how much students get improved. The results were statistically analyzed. The study findings revealed that there were significant differences in listening comprehension achievement for the favor of the post test results due to the suggested program based on aural authentic materials. Findings also revealed that the suggested program has large effect on students' achievement. Based on the above findings the researcher presents a number of pedagogical implications and suggestions for course designers, lecturers, university system and English majors as well

Manifestation of 12-quark bag state of sup 4 He nucleus in elastic d sup 4 He scattering

The sup 4 He d elastic scattering at the momentum of 19.8 GeV/c is analyzed in the framework of the Glauber theory. The scattering amplitude was evaluated using different sets of values of the nucleon-nucleon amplitude parameters and the sup 4 He density function as a superposition of the Gaussian functions. It is shown that it is impossible to describe simultaneously the p sup 4 He and d sup 4 He elastic scattering cross sections using the same set of the NN-amplitude parameters. Inclusion of the twelve-quark bag admixture to the ground state of the sup 4 He nucleus in the calculations allows one to reproduce the experimental data quite well. It is shown that the admixture manifests itself in the d sup 4 He elastic scattering in the whole region of the momentum transfer. At small t the effect can be at the level of approx 10%. At large t it can be approx 30