Table of content

Baghdad Science Journal

مجلة بغداد للعلوم

ISSN: 20788665 24117986
Publisher: Baghdad University
Faculty: Science for Women
Language: Arabic and English

This journal is Open Access

About

A Scientific and Evaluated Journal Published by the College of Science for Women, University of Baghdad
Date of First issue(2004)
No.of Issue per year(4)
No.of papers per issue (25)
No. Of issue published between 2004-2016(50) issue
This Journal publish paper in Arabic and English in area of Biology, Chemistry, Physics, Mathematics and Computer.

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Contact info

Phone Number:07800709148
E-mail: bsj@csw.uobaghdad.edu.iq
E-mail: baghdadscij@csw.uobaghdad.edu.iq
E-mail:bjs.csw@gmail.com

Table of content: 2009 volume:6 issue:1

Article
The Effect of Sodium Propionate on Microorganism and Self life of Laboratory Biscuit
تأثير بروبيونات الصوديوم في أعداد الأحياء المجهرية واطالة مدة صلاحية البسكت المختبري

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Abstract

This study has been conducted to examin the effect of sodium propionate at different level of 0.03,0.06,0.10% on the number of bacteria and mold and to extend the storage life of laboratory processed biscuit. The results indicated that the use of 0.10% sodium propionate prolonged the storage peroid until the third month, while the use of 0.20% sodium propionate showed no growth of bacteria up to six month of storage, three types of bacteria has been isolated from processed biscuit, namely, Staphylococcus aureus, Bacillus cereus, Esherichia coli. using 0.10% sodium propionate showed no growth of mold up to three month of storage ,while using of 0.15 % and 0.20% sodium propionate prevent the growth of mold up to five and six months of storage respectively, Penicillum sp ,Aspergillus terrius, Aspergillus niger, flavus Aspergillus were isolated from the processed biscuit.

Keywords

أجريت هذه الدراسة لمعرفة تأثير إضافة بروبيونات الصوديوم بتراكيز 0.10 و 0.15 و 0.20 و %0.30 في أعداد الأحياء المجهرية وإطالة مدة حفظ البسكت المصنع مختبرياًعند خزنه بدرجة حرارة تتراوح بين 20-40مْ (حرارة الغرفة) . أظهرت النتائج أن إضافة بروبيونات الصوديوم بتركيز %0.10 أدى إلى تثبيط البكتريا خلال الأشهر الثلاثة الأولى من الخزن في حين أدت إضافة التركيز %0.20 إلى عدم نمو البكتريا لغاية الشهر السادس من الخزن . عزلت من البسكت ثلاثة أنواع من البكتريا وشخصت وهي Escherichia coli و Bacillus cereus و Staphylococcus aureus . كما أدى استخدام بروبيونات الصوديوم بتركيز %0.10 إلى تثبيط النمو الفطري حتى الشهر الثالث في حين استمر التثبيط حتى الشهر الخامس عند استخدام التركيز %0.15 ، وعند استخدام التركيـز %0.20 لم يحدث النمو الفطري حتى الشهر السادس من الخزن . عزلت ألأعفان التالية من البسكت وشخصت إلى الأجناس Aspergillus niger و Aspergillus terrius وflavus Aspergillus و Penicillum sp . --- خزن، بكتريا، فطريات، بسكت، بروبيونات الصوديوم.


Article
Effect of Gamma Rays on Some Stages of Development of Rhyzopertha dominica (Fab.)
تأثير اشعة كاما في بعض ادوار حشرة ثاقبة الحبوب الصغرىRhyzopertha dominica (Fab)

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Abstract

The effect of different doses of gamma rays that emitted from 60Co on the development of different stages of lesser grain borer Rhyzopertha dominica (Fab.) was investigated . The results showed that the eggs in both early (1-3 days) and late (7-9) old were very sensitive to gamma rays and its hatch was zero at 10 Gy for both ages in comparison with 83.3% for the control group. Furthermore, the results illustrated that the larval stage in its two old ages were different in the radiosensitivity, the percent of its death were 100% & 96.6% when they exposed to 100 & 120 Gy, respectively. Moreover, the results showed that the sensitivity of pupal stage at age of 1-3 days was increased with increasing the doses of gamma rays, the percent of normal adults eclosed from irradiated pupae was 83.3% at the dose of 20 Gy and it became 3.3% at the dose of 200 Gy in comparison with that of the control treatment which was 93.3%.


Article
Effect Of Chlorothalonil On Some Cytogenetic Parameters Of Human Peripheral Blood Lymphocytes
تاثير المبيد Chlorothalonil في بعض مؤشرات الوراثة الخلوية للخلايا اللمفاوية للدم المحيطي للانسان

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Abstract

The study aimed to investigate the effect of fungicides chlorothalonil at different concentrations ( 0.1 , 0.5 , 5 , 25 , 50 ) × 10 - 5 M on some cytogenetic parameters of human peripheral blood lymphocytes . The genotoxicity parameters were estimated by the number of chromosomal aberrations (CAs) and their types and by estimating the induced micronuclei (Mn) . Cytotoxic effect recorded by estimating the mitotic index (MI) . Results revealed that the fungicide increased the CAs in dose – response pattern with positive correlation coefficient ( r = + 0.964) , there was a significant differences among the concentrations (P<0.01) . The major CAs records chromosomal breakage at concentrations. 0.5 , 5 , 25 , and 50 , while the lowest concentration ( 0.1) showed no abnormalities . Dicentric and ring chromosomes appeared at high concentration (25) and were (1 ± 0.06) which increased significantly upon duplication of concentration ( i.e., 50) in which another abnormality appeared and this was acentric chromosomes . Mn increased propotionally with increasing concentrations with positive correlation coefficient ( r = + 0.91 ) , but the value recorded for the lowest concentration (0.1) was non significant compared to control treatment . The percentage of MI were lower by increasing chlorothalonil concentration with a significant difference (P<0.01) although the decrease was not strongly


Article
Effect of leaves Extracts of Duranta repens on growth and activity of some types of Pathogenic Bacteria and Some types of Fungi
تأثيرمستخلصات اوراق نبات الدورانتا Duranta repens في نمو وفعالية بعض الأنواع البكتيرية المرضية وبعض الفطريات

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Abstract

A study were conducted to examinate the effect of organic and aqueous (Hot, Cold) Extracts from leaves of Duranta repens on the growth and activities of the following types of Bacteria:- Staphylococcus aureus,Streptococcus pyogens ,Escherichia coli,Klebsilla pneumonia, in addition to the yeast Candida albicans and the fungi Aspergullis niger ,Aspergulls flavus. The result showed that gram Positive Bacteria is more sensitive to the extracts than gram negative bacteria with Minimum inhibitory concentration (MIC) value (50,25,50,100)% and Minimum Bactericidal Concentration (MBC) value (100,50,200,100)% for all types Bacteria respectively . The most active extract against A.niger ,A,flavus was cold and hot aqueous extract from the leaves with diameter growth of colony value of ( 0.93,0.37)cm for A.niger in 20 % concentration compared with organic extract (0.26)cm, and the inhibition zone value of cold and hot extract to A.flavus (0.90,0.80)cm respectively compared with organic extract (7.056)cm.


Article
Wheat response to increase levels of Urea fertilizer
استجابة نبات القمح لمستويات متزايدة من سماد اليوريا

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Pots experiment was conducted in the green house of Biology Department, College of Education ( Ibn-AL-Haithum), University of Baghdad , during the growing season of 2005-2006 , to study the effect of five levels of urea fertilizer (0,50,100,150and 200) mg/pot in on vegetative growth of one wheat cultivar (Adanania) upon randomized complete block design with four replications. The results showed that significant difference between urea fertilizer levels above in vegetative growth characteristics ( plant height , leaf area , chlorophyll content, dry matter weight , relative efficiency and relative yield ) It was also showed that 200 mg/pot level was superior to urea fertilizer levels others in above characteristics studied except relative yield .


Article
Purification and Characterization β - lactamase produce from local isolate Klebsiella pneumonia
تنقية وتوصيف انزيم البيتالاكتميز المنتج من العزلة المحلية pneumoniae K.

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Beta-lactamase was purified from local isolate Klebsiella pneumonia by several steps included precipitation with ammonium sulphate at 20-40% saturation, DEAE- ion exchange chromatography and gel filtration on Sephacryl S-200 column. The obtained purification fold and recovery were 32.66; 47.04% respectively. The characterization of the purified beta-lactamase showed that the molecular weight was about 4000 daltons as determined by gel filtration. Purified enzyme had an optimal pH of 7 for activity and an optimal stability between pH 6.5-7.5, results shows that the optimal temperature appear to be 35 ه C . During storage the enzyme retained 72% at -20 ه C and retained 25% of the activity at the same period at 4 ه C.


Article
Evaluation of the electron correlation for lithium atom (Li) in ground state
حساب العلاقة الألكترونية لذرة الليثيوم في الحالة المستقرة

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The aim of this work is to study the correlation between the electrons for Li atom in ground state through the calculation of the inter-particle distribution function f (r12) and inter-particle expectation values . By using the f(r12) function for KL shell in both singlet and triplet state .The Fermi hole have been evaluated .In this work the Hartree-Fock wave function (1993) have been used.


Article
Determination of Similarity and Variance in Energy and Depositional Environment, the Difference in Diagenesis and the Variance in the Petrophysical Properties of Reservoir Rocks in Zubair Formation , South Iraq
تحديد التماثل والتغاير بطاقة وبيئة الترسيب والاختلاف في العمليات التحويرية والتباين بالصفات البتروفيزيائية في الصخور المكمنيةلتكوين الزبير- جنوب العراق

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Records of two regionalized variables were processed for each of porosity and permeability of reservoir rocks in Zubair Formation (Zb-109) south Iraq as an indication of the most important reservoir property which is the homogeneity , considering their important results in criterion most needed for primary and enhanced oil reservoir . Z and F tests that were calculated for the two above mentioned properties of pair units of Zubair Formation have shown the difference in depositional energy and different diagenesis between units IL and AB , DJ and AB , and the similarity in grains size , sorting degree , depositional environment and pressure gradients between IL and AB units , LS and IL units ; also the difference in the properties above between AB and DJ units , AB and MS units .The coefficient of variation results have shown that AB and MS units have high values indicating heterogenous normal distribution and low values of porosity and permeability compared with other Zubair Formation units .


Article
A Study of structural and electrical properties ofCuIn (Sex Te1-x) 2 thin films
دراسـة الخواص التركيبية والكهربائية لاغشية الرقيقة CuIn (Sex Te1-x)2

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In this research, resistivity of CuIn (Sex Tel-x)2 thin films prepared by thermal evaporation of thickness (250+25nm) , was measured in an electrical measurement system in the temperature ranges ( 293oK - 423oK). Resistivity of the samples was also measured after annealing for one hour in vacuum for two temperatures ( 373oK and 423oK) . Activation energies of these films were calculated before and after annealing, type of majority charge carrier was known by (Hall effect) and concentration of charge carrier and its mobility before and after annealing was also calculated.


Article
The chemical composition of some kinds of local soybean Glycine max and its utilization in manufacturing supporting cereal baby foods
التركيب الكيميائي لبذور بعض أصناف فول الصويا Glycine max وامكإنية استعمالها في تصنيع أغذية الأطفال الحبوبية المساعدة-1 التحليل الكيميائي لأصناف فول الصويا وخلطات الغذاء المصنع

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This study was conducted on five kinds of local soybean seeds (Ibaa, Hawija, Taqa.2, Lee74 and Hassan). The chemical analysis results showed that Hawija soybean has the highest percent of protein which was 38-08%, The amino acid percent was also higher than the other kinds(lysine, Thereonine and Tryptopham), and being 389,250,81 mg/gm nitrogen respectively Both amino acids were important for child nutrition. Hawija was selected, being the best for proteins and basic amino acids, and was utilized in preparation of the adjunct baby food formula. Eighteen formulas had been prepared by using soybean flour kind(Hawija), wheat flour kind (Abu gharib) and full fat powder milk (NIDO). Each formula contained 20% protein as recommended by F.A.O, W.H.O and Iraqi standard. The chemical analysis results showed that formulas had low moisture content(3.18-3.60%) and high carbohydrate content (59.10-60.12%), The protein and fat content was 19.23-20.81 and 14-4.35% respectively. The content of ash of the formulas were(2.50-3.23%),the calorie value was 430.17-432.42 K.cal /100 gm sample.the sensory evaluation showed that, the formulas with high contain in whole cream powder of milk or wheat flour, obtained higher sensory evaluation grades.


Article
The Relationship Between Hyperglycemia and the Rheumatoid Factor in the Serum of Diabetic Patients
العلاقة بين ارتفاع السكر والعامل الرثوي في مصل مرضى السكري

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Abstract

This study was conducted to determine the relationship between two most common diseases in Iraqis patients , which are Diabetic mellitus (DM) and Rheumatoid Arthritis (RA); seeking rheumatoid factor in hyperglycemic sera. The results revealed that ; 62.5% of hyperglycemic (HG) patients had positive rheumatoid factor (RF) . No difference in number between both gender of HG patients (20 males and 20 females ) , RF reaction was nearly similar in males and females of HG patients ( 12 &13 respectively ) . Only 40% out of patient controls had positive RF . None of the apparently healthy subjects had positive RF .


Article
The Necroinflammatory activity of HCV inliver biopsies of Iraqi patients that detected byIn Situ hybridization technique.
دراسة الفعالية الالتهابية التنخرية للفايروس نمط-ج في خزعات الكبد للمرضى العراقيين والكشف عنها باستخدام تقنية In Situ hybridization

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In situ hybridization assay was performed from 22 chronic hepatitis-C virus(CHC) patients (9 males and 13 females) (all of them known to be positive for anti-CH antibodies and high transaminase levels(GOT,GPT)) in order to study the necroinflammatory activity and detection of HCV-RNA in the sections of liver biopsies. The results showed that the percentage of infected cells were ranged from (10-100%) with mean value of 61.77%. The HCV-RNA was detected in the cytoplasm of hepatocytes.


Article
Study of ELISA and antibiotic sensitivity test for Salmonella enteritidis as experimental infection in mice
دراسة اختبار الاليزا وفحص الحساسية الدوائية للسالمونيلا المعوية كأصابة تجريبية في الفئران

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Salmonella enteritidis one of more important as epidemiological bacteria between other salmonella types. It is very important pathologically that cause food poising and gastrointestinal tract infections. This study includes some of immunological changes that appear by ELISA test and antibiotic sensitivity test against these bacteria in mice. ELISA test results appears high immunological response happen after 3 days of inoculation, mean titration readings beginning 0.198 and the maximum mean titration after 15 days of inoculation 1.538 and begin to decrease after this time slowly to remain about 0.297 after 40 days of inoculation. An antibiotics sensitivity test result appears, this bacteria sensitive to Chloramphenicol, Ceftriaxone, Ciprofloxacin and Cotrimaxazol. Resistance to Neomycin, Streptomycin and Rifampicin, while intermediate against Ampicilin and Amoxicillin. Another test we use Vitek system to know bacterial sensitivity against to more another types of antibiotics and to confirm between some of them.


Article
MORPHOLOGICAL STUDIES ON THE EFFECT OFNIGELLA SATIVA SEEDS ON THE MAMMARY GLAND OF MATURE MALE NORWAY RAT
دراسات شكليائية لتأثير بذور الحبة السوداء على الغدد اللبنية لذكر الجرذ النرويجي الناضج

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Nigella sativa seeds (NSS) are reputed traditionally and scientifically as a potent agent that promote milk secretion (galactagogue), but their mechanism of action is studied trivially. One suggestion was that these seeds are bio-transformed to sex hormones within the ovaries. Therefore, this investigation was designated to throw light on the action of these seeds in the absence of ovaries i.e. in male rats. Thirty Norway male albino rats were used in this investigation. They were divided into experimental (n=20,fed NSS 2g/ Kg body weight /day for 14 days) and control (n=10, fed placebo for 14 days). After sacrifice mammary gland and blood samples were obtained. Experimental rats revealed a significant increase (p (0.01>in weight, hypertrophied mammary gland lobules with dilated ducts and rise in serum prolactin level, as compared to the controls. The Mammogenic action of NSS is most probably conveyed via extra-ovarian pathway. Nigella sativa seeds have an estrogen and progesterone like action or their steroidal saponins may be biotransformed to these hormones and cause mammogenesis .


Article
Temperature Dependence of Hall Mobility AndCarrier Concentration of pb0.55S0.45 Films
اعتمادية درجة الحرارة لتحركية هول وتركيز الحاملات لاغشية 0450.55bSP

Authors: A.A.Baker انوار علي باقر
Pages: 129-134
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Measurements of Hall effect properties at different of annealing temperature have been made on polycrystalline Pb0.55S0.45 films were prepared at room temperature by thermal evaporation technique under high vacuum 4*10-5 torr . The thickness of the film was 2μm .The carrier concentration (n) was observed to decrease with increasing the annealing temperature. The Hall measurements showed that the charge carriers are electrons (i.e n-type conduction). From the observed dependence on the temperature, it is found that the Hall mobility (µH), drift velocity ( d) carrier life time ( ), mean free path (λ) were increased with increasing annealing temperature


Article
Studies on solution – growth thin films of CdS : Zn for photovoltaic application
دراسة أغشية CdS:Zn المرسبة بطريقة النمو بالمحلول المستخدم في تطبيقات الفوتولتائية

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Structural, optical, and electrical properties of thin films of CdS : Zn prepared by the solution – growth technique are reported as a function of zinc concentration. CdS are window layers influencing the photovoltaic response of CIS solar cells. The zinc doping concentration was varied from 0.05 to 0.5 wt %, zinc doping apparently increase the band gap and lowers the resistivity. All beneficial optical properties of chemically deposited CdS thin films for application as window material in heterojunction optoelectronic devices are retained. Heat treatment in air at 400 °C for 1h modify crystalline structure, optical, and electrical properties of solution growth deposited CdS : Zn films.


Article
The structure and optical properties of CdSe:Cu Thin Films
الخواص التركيبية والبصرية للأغشيةالرقيقة CdSe:Cu

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A polycrystalline CdSe thin films doped with (5wt%) of Cu was fabricated using vacuum evaporation technique in the substrate temperature range(Ts=RT-250)oC on glass substrates of the thickness(0.8μm). The structure of these films are determined by X-ray diffraction (XRD). The X-ray diffraction studies shows that the structure is polycrystalline with hexagonal structure, and there are strong peaks at the direction (200) at (Ts=RT-150) oC, while at higher substrate temperature(Ts=150-250) oC the structure is single crystal. The optical properties as a function of Ts were studied. The absorption, transmission, and reflection has been studied, The optical energy gap (Eg)increases with increase of substrate temperature from (1.65-1.84)eV due to improvement in the structure. The amorphousity of the films decreases with increasing Ts. The films have direct energy gap and the absorption edge was shift slightly towards smaller wavelength for CdSe:Cu thin film with increase of substrate temperature.it was found that the absorption coefficient was decreased with increasing of substrate temperature due to increases the value of(Eg). The CdSe:Cu films showed absorption coefficient in the range (0.94 x104-0.42x104)cm-1at Ts=RT-250 oC. Also the density of state decreases with increasing of substrate temperatures from (0.20-0.07)eV, it is possibly due to the recrystallization by the heating substrate temperatures.. Also the extinction coefficient, refractive index and dielectric constant have been studied.


Article
Investigation of optical properties of cadmium sulfide (CdS) thin films by chemical bath deposition
دراسة الخصائص البصرية لأغشية رقيقة لمركب كبريتيد الكادميوم بأستخدام طريقة الترسيب بالحمام الكيميائي

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Thin films of CdS were deposited on glass substrates using a chemical bath deposition technique from aqueous solutions of Cadmium sulfate (CdS) and thiouria. The films grown from the bath are uniform and adherent, have a high transmittance in the visible region. The CdS films properties studied include optical transmission, optical constant, dielectric constant, optical conductivity, and band gaps. The films in this study produced fairly high transmission (> 86% between 500 and 900). Band gaps of (2.4 eV) for direct transition were obtained. Such films could be used as photocells and other photoconductive devices, thin film transistors and diodes, piezoelectric ultrasonic transducers and amplifiers, piezoelectric acoustic resonators and electron beam-pumped lasers.


Article
Investigation of the Porosity of Certain Iraqi Clay Deposits by Mercury Porosimeter
التحري عن مسامية بعض ترسبات الاطيان العراقية باستخدام مقياس المسامية الزئبقي

Authors: Sahar S. Hassan سحر صبيح حسن
Pages: 163-172
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Pore volume, pore diameter, and pore volume distribution of three of Iraqi natural clay deposites were measured using mercury intrusion porosimetry .The clays are white kaolin, colored kaolin, and bentonite .The results showed that the variation of the pore area of the clay deposites followed the following order :- Coloured Kaolin > White Kaolin > Bentonite While the pore volume may be arranged as in the following sequence:- White Kaolin > Coloured Kaolin >Bentonite Also , Bentonite exhibits the narrow range pore size distribution than the white and coloured kaolin.


Article
Synthesis and Characterization of Tripodal Tetradentate Ligand Type NS3 and its Complexes with Re(V), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II)
تحضير وتشخيص ليكاند رباعي السن نوع NS3 ومعقداته مع ايوناتRe(V)، Ni(II)، Cu(II)، Zn(II)، Cd(II)، و Hg(II)Re(V)، Ni(II)، Cu(II)، Zn(II)، Cd(II)، و Hg(II)

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This work represents the preparation of the starting material, 3-chloro-2-oxo-1,4-dithiacyclohexane (S) using a new method. This material was reacted with, 4-phenylthiosemicarbazide to give (H3NS3) as a tetradentate ligand H3L. New complex of rhenium (V) with this ligand of the formula [ReO(L)] was prepared. New complexes of the general formula [M(HL)] of this ligand when reacted with some metal ions where: M = Ni(II), Cu(II), Cd(II), Zn(II), Hg(II) have been reported. The ligand and the complexes were characterized by infrared, ultraviolet–visible, mass, 1H nuclear magnetic resonance and atomic absorption spectroscopic techniques and by (HPLC), elemental analysis, and electrical conductivity. The proposed structure for H3L with Re (V) is square pyramidal, while Ni(II) complex was square planar geometry, and with the rest of metal ions are distorted tetrahedral.


Article
Corrosion inhibition of Zinc by Imidazol in Acidic Media
تثبيط تاكل الزنك في الوسط الحامضي بأستخدام الأميدازول

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The inhibitive effect of imidazol on the dissolution of Zn in (1M) HCl has been studied. The inhibion effect of imidazol ,protection efficiency and the corrosion rate of Zn in (1M) HCl were investigated at various concentrations (1x 10-3 – 5x10-3) M and tempearture range (285-328) K. The corrosion inhibitive of Zn by imidazol was studied using weight loss measurement and analytical titration of the amounts of dissolved zinc in acidic solution in presence and absent of imidazol. It was observed that imidazol led to protection efficiency reached to (88.93)% when (10)mM imidazol concentration was used. A linear relationship came true between (C/θ) and (C); where (θ) is the coverage of Zn surface by imidazol which could be obtained from the rate of corrosion in the presence and absent of inhibitor in the acid solution and (C) is the concentration of imidazol. This linear relationship indicate that the inhibition action occure via Langmiur adsorption mechanism. Eventually, the corrosion rates, activated energy ,Arrhenius constant, changes in free energy, enthalpy and entropy accompanying with imidazol adsorption on Zn surface were calculated.


Article
Synthesis of Some New 1,2,4-Triazoles Derived from 2-Mercaptobenzimidazole
تحضير بعض مركبات 1, 2, 4- ترايزول الجديدة المشتقة من 2- مركبتوبنزاميدازول

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New 1,2,4-triazole derivatives of 2-mercaptobenzimidazole (MB) are reported. Ethyl (benzimidazole-2-yl thio) acetate (1) has been prepared by condensing 2-mercaptobenzimidazole with ethylchloroacetate. The ester (1) on reacting with hydrazine hydrate gave the corresponding acetohydrazide(2)which was reacted separately with phenylisocyanate and phenylisothiocyanate, followed by ring closure in an alkaline medium giving 3-[(benzimidazole-2-yl thio) methyl]-4-phenyl-1,2,4-triazole-5-ol and 3-[(benzimidazole-2-yl thio) methyl]-4-phenyl-1,2,4-triazole-5-thiol respectively (6,7). Reaction of acetohydrazide (2) with CS2 and ethanol/KOH, gave dithiocarbazate salt (8). Cyclization of (8) with hydrazine hydrate gave 3-[(benzimidazole-2-yl thio) methyl]-4-amino-1,2,4-triazole-5-thiol (9). Furthermore, new Schiff bases (3a-e) were prepared through the reaction of the acetohydrazide (2) with aromatic aldehydres. The prepared compounds were identified by spectral methods FTIR, UV. Measurements of some physical properties and some specific reactions, were carried out.

Keywords


Article
On Monotonically T2-spaces and Monotonicallynormal spaces
الفضاءات- T2 الرتيبية والفضاءات العادية الرتيبية

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In this paper we show that if  Xi is monotonically T2-space then each Xi is monotonically T2-space, too. Moreover, we show that if  Xi is monotonically normal space then each Xi is monotonically normal space, too. Among these results we give a new proof to show that the monotonically T2-space property and monotonically normal space property are hereditary property and topologically property and give an example of T2-space but not monotonically T2-space.


Article
Weak Essential Submodules
المقاسات الجزئية الجوهرية الضعيفة

Authors: Mona A. Ahmed منى عباس احمد
Pages: 214-221
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A non-zero submodule N of M is called essential if N L for each non-zero submodule L of M. And a non-zero submodule K of M is called semi-essential if K P for each non-zero prime submodule P of M. In this paper we investigate a class of submodules that lies between essential submodules and semi-essential submodules, we call these class of submodules weak essential submodules.


Article
ON NAIVE TAYLOR MODEL INTEGRATION METHOD
نموذج مبسط لطريقة تيلر للتكامل

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Interval methods for verified integration of initial value problems (IVPs) for ODEs have been used for more than 40 years. For many classes of IVPs, these methods have the ability to compute guaranteed error bounds for the flow of an ODE, where traditional methods provide only approximations to a solution. Overestimation, however, is a potential drawback of verified methods. For some problems, the computed error bounds become overly pessimistic, or integration even breaks down. The dependency problem and the wrapping effect are particular sources of overestimations in interval computations. Berz (see [1]) and his co-workers have developed Taylor model methods, which extend interval arithmetic with symbolic computations. The latter is an effective tool for reducing both the dependency problem and the wrapping effect. By construction, Taylor model methods appear particularly suitable for integrating nonlinear ODEs. In this paper, we analyze Taylor model based integration of ODEs and compare Taylor model with traditional enclosure methods for IVPs for ODEs. More advanced Taylor model integration methods are discussed in the algorithm (1). For clarity, we summarize the major steps of the naive Taylor model method as algorithm 1.


Article
Some Results On Lie Ideals With (σ,τ)-derivationIn Prime Rings
بعض النتائج على امثلة لي مع مشتقة(σ,τ)في الحلقات الاولية

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Abstract

In this paper, we proved that if R is a prime ring, U be a nonzero Lie ideal of R , d be a nonzero (σ,τ)-derivation of R. Then if UaZ(R) (or aUZ(R)) for aR, then either or U is commutative Also, we assumed that Uis a ring to prove that: (i) If UaZ(R) (or aUZ(R)) for aR, then either a=0 or U is commutative. (ii) If ad(U)=0 (or d(U)a=0) for aR, then either a=0 or U is commutative. (iii) If d is a homomorphism on U such that ad(U) Z(R)(or d(U)aZ(R), then a=0 or U is commutative.

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