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: 2014 volume:11 issue:1

Article
Rapid Detection of Aspergillus flavus isolates producing aflatoxin using UV light on different culture media
الكشف السريع لعزلات Aspergillus flavus المنتجة لسموم الافلاتوكسين باستعمال الأشعة فوق البنفسجية UV light وعلى أوساط زرعية مختلفة

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Abstract

This study included the isolation and identification of Aspergillus flavus isolates associated with imported American rice grains and local corn grains which collected from local markets, using UV light with 365 nm wave length and different media (PDA, YEA, COA, and CDA ). One hundred and seven fungal isolates were identified in rice and 147 isolates in corn.4 genera and 7 species were associated with grains, the genera were Aspergillus ,Fusarium ,Neurospora ,Penicillium . Aspergillus was dominant with occurrence of 0.47% and frequency of 11.75% in rice grains whereas in corn grains the genus Neurospora was dominant with occurrence of 1.09% and frequency 27.25% ,results revealed that 20 isolates out of 50 A. flavus isolates were able to produce aflatoxin .results also indicated that the best medium for toxin production was (COA) followed by (PDA and YEA), whereas the suitable temperature and incubation period for toxin production was 35◦c and 7 days.

Keywords

Aspergillus flavus --- Rice --- Aflatoxins --- UV --- corn


Article
The Effect of Vitamin A on Testis Weight and Sexual Glands on Albino Male Mice Treated with Hexavalent Chromium
تأثير فيتامين A في معدل أوزان الخصى و الغدد الجنسية في ذكور الفئران البيض المعاملة بالكروم سداسي التكافؤ

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Abstract

This study was conducted to determine the effect of vitamin A ( 10 mg/kg ) on avearage testis weight and sexual glands ( Prostate and Seminal Vesicle ) for albino male mice treated with Hexavalent chromium ( 1000 ppm ) .The current study 40 mice were divided into fife groups : 1st group treated with distilled water and considered an control group (C) / the 2nd group treated with sesame oil ( T1) / 3rd group was givin hexavalent chromium ( 1000 ppm ) (T2) / 4th group treated with vitamin A ( 10 mg / kg ) and exposed to hexavalent chromium ( 1000 ppm ) (T3) / 5th group treated with vitamin A ( 10 mg kg ) (T4) . The expermint lasted 35 day . the results showed a significant ( P ˂ 0.05 ) decrease in avearage testis weight and sexual glands ( Prostate and Seminal Vesicle ) as compared with control group . Results also showed a significant ( P ˂ 0.05 ) increase in avearage testis weight and sexual gland (Prostate and Seminal Vesicle ) in the group treated with vitamin A and exposed to hexavalent chromium in comparison with group that treated with hexavalent chromium . the last group that treated with vitamin A showed a best significant ( P ˂ 0.05 ) increase in all the parameters studied in comparison with group treated with sesame oil . In conclusion , vitamin A had positive effect on fertility of albino male mice through its effect at testis and sexual glands ( Prostate and Seminal Vesicle ) weights by improving the negative effect caused from exposing to hexavalent chromium .


Article
Evaluation of the effectiveness of the crude juice of Olive (Olea europaea) in reducing the percentages of chromosomal aberration and micronuclei in albino mice
تقييم فعالية العصير الخام لثمرة الزيتون (Olea europaea) في خفض نسبة الانحرافات الكروموسومية و النوى الصغيرة في خلايا نقي العظم للفئران البيض

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Abstract

This research was carried out to evaluate the activity of crude juice of Olive on some cytogenetic parameters in mice like chromosomal aberration (CAs) and micronuclei formation(MN). The results showed that there was no significant difference between the crude juice (green and black)in CAs(3.77,4.10)and MN(0.25,0.25) in comparison with negative control (3.39,0.22)respectively. The interaction effect between the crude before and after treatment with mutagen MMC showed that the crude is one of the vital inhibitors of the mutagen by its ability in reducing the percentages of both the CAs and MN in bone marrow cells in mice.


Article
Inhibition activity of Saccharomyces boulardii and Lactobacillus acidophilus against pathogenic E.coli isolates from Recurrent Urinary Tract Infection in women In Vitro
الفاعلية التثبيطية لخميرة Saccharomyces boulardii و بكتيريا Lactobacillus acidophilus ضد البكتيريا الممرضة E.coli المعزولة من أخماج المجرى البولي المتكررة لدى النساء العراقيات خارج الجسم الحي

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Abstract

The aims of study is to detect the inhibitory effect of Saccharomyces boulardii and Lactobacillus acidophilus on Escherichia coli that has been isolated from recurrent urinary tract infection in women. The sensitivity of E.coli isolates to antibiotics had been studied and the most resistant E.coli isolate to antibiotics had been studied .The cup assay was used on nutrient agar and Muller-Hinton agar to detect the inhibitory activity for each S.boulardii yeast grown on YEGP media and L.acidophilus grown on MRS media in which the result showed a high inhibition activity for each of them .Also in this study the adhesion property of E.coli had been evaluated in the presence of S.boulardii at concentration of 1×109 and L.acidophilus at concentration of 1×106. Result revelead that both of them inhibit the adhesion of E.coli at 72.73% and 64.91% , respecherely these concentrations was used to measure the bacteriocin activity produced by L.acidophilus and inhibitory compounds produced by S.boulardii.The result showed there were no growth for E.coli colonies after 48 hrs of incubation.


Article
Evaluation to the level of some inflammatory markers in hypothyroid insulin resistant patients
تقييم مستوى بعض العوامل الالتهابية لدى مرضى قصور الدرقية المقاومين للانسولين

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Abstract

Hypothyroidism is a condition in which thyroid hormones levels decreased in the blood. These hormones are necessary for energy production and body viability. In many occasions this condition is accompanied or followed by different metabolic disorders. The current study is conducted in the "Specialized center for endocrinology and diabetes" and carried on 70 hypothyroid patients and 60 randomly chosen individuals with normal thyroid function .Both groups were submitted to laboratory tests to evaluate thyroid function (T3,T4.TSH). The study involved evaluation of the relationship between hypothyroidism and insulin resistance (IR) . Health problem related to many diseases , became common lately. Insulin resistance diagnosed through two important tests: C-peptide (CP) and oral glucose tolerance test (OGTT). Patients are considered to have definite insulin resistance (DIR), if they have impaired glucose tolerance (IGT) and high level of CP. If one of the tests is abnormal, the patients have possible insulin resistance (PIR). The current study show that both conditions (hypothyroidism and insulin resistance) are associated and common in women, old and overweight individuals. The results show a significant (P<0.01) increase in levels of TNF-α reaching 6.46±1.02 pg/ml and 50.6±2.14 pg/ml respectively , in hypothyroid patients with DIR compared to control and the high levels of these parameters refer to subclinical inflammation . The non-specific inflammatory marker CRP , which refers to systemic inflammation , also increases in all hypothyroid patients (Insulin resistant or none) The current study also includes the study of correlations between inflammatory parameters in the study groups. The results show that there was a negative significant correlation between TNF-α and TSH (P<0.01) in DIR hypothyroid patients. Patients with PIR show positive significant correlation between levels of CRP and TNF-α (P<0.01).


Article
An Ecological and Identification Study for Algae in Groundwater of Selected Area in Tikrit city and It’s Surrounding Area
دراسة بيئية وتشخيصية للطحالب في المياه الجوفية لمناطق منتخبة من مدينة تكريت وضواحيها

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Abstract

The present study is carried out to identify the algae in the groundwater of the three areas of Tikrit city, including (the center of Tikrit , the region of AL-Jazira , Awainat village) by nine wells, a depths ranged between 9 meter at well 8 and 110 meter at wells 3 and 5 . And examined the environmental characteristics of physical, chemical and biological factors during the study period from September 2009 to June 2010. It is obtained that wells in the study area is lower alkalinity, average it ranged (6.448-7.418). It was noted that the values of the dissolved oxygen are few and almost non-existent in some cases it ranged between (6.5-6.3)mg/l , analysis of biological oxygen demand refers to wells water (clean- very clean) average it ranged between (1420-1990)mg/l . Reason of groundwater very hardness due to geological factors of study area, which was mostly the result of ion bicarbonates, and recorded rate values of sulphates (258.2-406.2)mg/l. As for plant nutrients, the values of silica were relatively high (7.07-10.935)mg/l .While the concentration of active nitrite ions and phosphate, were random during the study period, it ranged between(0.128-2.979),(0.564-2.065)mg/l respectively. The biological side of this involved the identifying of algal in the studies wells. Diatoms formed the highest majority of plan plankton in the study area, the ratio of diatoms was 48%, then the Chlorophyceae was 32.4%, and the ratio of Cyanophyceae was 14.2%, and lastly the Euglenophyceae was 5.1%. Chlorophyll values were relatively high , the values of chlorophyll a was lower from chlorophyll b , c values .That’s indicate dominated species of organisms in the study area. The results indicated analysis to limit many effect factors on concentration of chlorophyll in algae in the study area


Article
Effect of aqueous extract from Marjoram against Salmonella and cholera bacteria
دراسة تأثير المستخلص المائي لنبات البردقوش ضد بكتريا الكوليرا والسالمونيلا

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Five different bacterial isolates [ Vibrio cholera (Ogawa) , Vibrio cholera (Inaba) , Salmonella typhi , Salmonella paratyphi and ، Salmonella typhimurium ] were obtained from the Central Health Laboratory . Both sensitivity tests (MIC , MBC and wells method ) against these bacteria were performed by using the aqueous of leaves extract of Marjoram plant. The results cleared that the values of MIC for Vibrio cholera serotypes Ogawa and Inaba were 100 mg/ml , while the value of MBC was 200 mg/ml. The value of the Inhibition zone at 100 mg /ml concentration for both Ogawa and Inaba were 13 mm and 9 mm respectively. Our results showed that the three types of Salmonella didn’t show any inhibition zone at 200 mg/ml .


Article
Effect of Supplementation Different Level OF Zinc in Boiler Diet, Blood
تاثير اضافة مستويات مختلفة من الزنك في علائق فروج اللحم وبيان تاثيرها تحت ظروف الاجهاد الحراري

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Article
Kinetic and thermodynamic Studies Of Alanine Aminopeptidase(AAP) Isoenzymes I,II Partially Purified From Patient's Urine With Urinary Tract Cancer
دراسات حركية وثرموديناميكية لمتناظرات أنزيم الألنين أمينو ببتيديز (AAP) المنقاة جزئيا من إدرار المرضى المصابين بسرطان الجهاز البولي

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The activity of Alanine aminopeptidase( AAP ) was measured in the urine of healthy and urinary tract cancer patients , the results showed higher activity of (AAP) in patients compared to healthy . AAP was Purified from the urine of healthy and patients with urinary tract cancer by dialysis and gel filtration (Sephadex G – 50) and two isoenzymes of (AAP) were separated from urine by using ion-exchang resin (DEAE – Sephadex A – 50 ) in previous study. The kinetics studies showed that both isoenzymes I and II obeyed Michaelis – Menton equation . with optimal concentration of alanine-4-nitroanilide as substrate for isoenzymes I and II which was (2 x 10-3 mol/L ). The two isoenzymes obeyed Arrhenius equation up two 37° C and their Ea and Q10 constants were determined . The binding of alanine-4-nitroanilide by two isoenzymes I , II were studied and the kinetic constant ( k+1 , k-1 , Ka , Ks ) were indicated that the reaction was first order at 37° C .Thermodynamic parameters of the standard state ( ∆G°, ∆H° , ∆S° ) and the transition state ( ∆G*, ∆H* , ∆S* ) were determined by using Vant Hoff and Arrhenius equations.


Article
Production of Silicon Metal From Iraqi Sand
إنتاج معدن السليكون من الرمل العراقي

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Abstract

In this work, production of silicon metal at high purity of 99% by using Iraqi–starting materials (Iraqi sand and plant coal)was reported, electric arc–furnaces assembly was manufactured inside, the graphite electrodes were made from graphite scrap, this system is operate to produce about 800 gm /6hr of silicon metal to meet the need for manufacturing silicon oils, resins, solar cells, and electronic parts. The procedure, equipments and analysis data were described as well.


Article
We study the effect of Ultra violet rays (A-B) in treatment of Vitiligo (applied Therapy)
دراسة تطبيقية عن أثر أستعمال الاشعة فوق البنفسجية في علاج مرض البهاق

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This research evaluated the effect of (UV)(400-320A)Hz(320-220B)Hz on the patient with vitiligo , using it with our new combing therapy that include the oral (Psorlene ) topical , meladinine solution applied on the Vitiligiousns Lesions , In edition to the instralesnional injection in the Vitiligiousns Lesions by long acting steroid (kenacort-A ) by aprecentage of (5%) , after that we expose the patient to UV . The ruslets of this way of treatment more effective by using of the UV rays in the treatment of vitiligo , while the previous treatment that used the UV ray with or with out the psorlene , the results were not effective on controlling of the Vitiligio diseases comparing by the treatment used in this research as it stop’s the spread of the diseases and curing it .


Article
Study ABO/Rh system with Endothelial Inflammatory Factors in Iraqi Arab Female with Diabetes Mellitus Type II
دراسة نظام ABO/Rh مع العوامل الألتهابية لبطانة الأوعية الدموية في مرضى السكري من النوع الثاني لدى النساء العراقيات العربيات

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Abstract

Diabetes mellitus type II is a disorder of metabolism and complex diseases affected by genetic environmental factors and associated with inflammation. The symptoms of type II diabetes develop gradually, which are associated with increased blood concentration of marker of the endothelial inflammatory factors. The expression of adhesion molecules, including E-selectin, intracellular adhesion molecule-1(ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) on the surface of vascular endothelial cells to help leukocyte stick to other surrounding tissues. Many researchers have made attempts to determine the significance of particular ABO phenotype for the susceptibility to diseases. Many reports show a strong association with the ABO blood groups and diabetes Type II. Dysfunction increases risk of type II diabetes among women with low level of subclinical incident diabetes. For that reason the present study has been designed to study the association between diabetic, endothelial dysfunction and blood group in Iraqi Arab diabetic women. Sixty patients of Iraqi Arabs female with previous diagnosed diabetic type II involved in this study and comparison with twenty controls matched in age, sex and ethnic groups. Both of patients and control divided into four sub groups according to the blood types. We evaluated endothelial inflammatory factors ICAM, VCAM and E-Selectin. Present data showed a significant difference in the serum level of ICAM-1 and E-section between diabetes mellitus type II patients and controls while there were no significant differences in the serum level of VCAM-1. In conclusion, significant increasing of the level of ICAM-1 and E-selectin made them as a risk factors to predict diabetes progression, women who carry blood group A, B and AB show appositive association with diabetic, while females who carry blood group O less susceptible to infected with diabetes mellitus type II.


Article
Phenolic Content and Antioxidant, Antibacterial Activities of Ethanolic Extract From Lemon Balm and Oregano Plants
المحتوى الفينولي والفعالية المضادة للاكسدة والبكتريا للمستخلص الايثانولي لنباتي الترنجان والبردقوش

Authors: Rami Ali Taqi رامي علي تقي
Pages: 103-110
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Abstract

The antioxidant and antibacterial activities of ethanolic extract and phenolic compounds extract of Lemon balm (Melissa officinalis) and Oregano (Oreganum vulgare) plants were studied; the phenolic content and the relationship between these compounds and the above activities were also investigated. The results showed that the Lemon balm had the highest phenolic content (56.5% mg g) and the phenolic content of Oregano was twice lower than Lemon balm. Lemon balm has the highest antioxidant activity which causes lipid peroxidation inhibition activity of linoleic acid (90.5%), this activity was more than α-tocopherole antioxidant activity (79.3 %). It was found that the main source of antioxidant activity of these plants was belonging to phenolic compounds and the results proved the strong relationship between antioxidant activity and phenolic content. The ethanolic extract of Lemon balm was exhibited strong antibacterial activity ,the inhibition included all bacterial isolates , with highest inhibition zone against Bacillus cereus ( 26 mm), while Oregano did not exhibit clear antibacterial activity, Aeromonas hydrophila was the most resistant isolate . It was obvious from the results of effect of phenolic compounds on bacteria that no relationship between antibacterial activity and phenolic content and the inhibition may be due to other compounds.


Article
Comparison of Properties of Various Heat Storage Fluids used with Evacuated Tube of Solar Water Heater
مقارنة خواص موائع الخزن الحراري المختلفة المستخدمة مع الأنبوب المفرغ للسخانات الشمسية

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The aim of this work was to capture solar radiation and convert it into solar thermal energy by using a storage material and the heat transfer fluid like oil and water and comparison between them, we used the evacuated tube as a receiver for solar radiation, The results showed that the oil better than water as storage material and the heat transfer fluid and the effective thermal conductivity material and good for power level, rates and durations of charge and discharge cycles.


Article
Corrosion Protection Study of Carbon Steel and 316 Stainless Steel Alloys Coated by Nanoparticles
دراسة حماية التاكل للكاربون ستيل وسبيكة الستنلس ستيل 316 بواسطه التغطية بمواد نانوية

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The Corrosion protection effectiveness of Alimina(Al2O3,50nm)and Zinc oxide (ZnO,30nm) nanoparticales were studied on carbon steel and 316 stainless steel alloys in saline water (3.5%NaCl)at four temperatures: (20,30,40,50 OC)using three electrodes potentiostat. An average corrosion protection efficiencies of 65 %and 80% was achieved using Al2O3 NP's on carbon steel and stainless steel samples respectively, and it seems that no effect of rising temperature on the performances of the coated layers. While ZnO NP'S showed protection efficiency around 65% for the two alloys and little effected by temperature rising on the performanes of the coated layers. The morphology of the coated spesiemses was examined by Atomic force microscope.


Article
Copolymerazaion of N-vinyl-2-pyrrolidon with Acrylic Acid and Methylmethacrylate
البلمرة المشتركة لمونومير N- فينايل -2- بايروليدون مع حامض الاكريلك والميثايل ميثاكريليت

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Low conversion copolymerization of N-vinyl-2-pyrrolidon M.W = (111.14) VP (monomer-1) has been conducted with acrylic acid AA and methymethacrylate MMA in ethanol at 70ºC , using Benzoyl peroxide BPO as initiator . The copolymer composition has been determined by elemental analysis. The monomer reactivity ratios have been calculated by the Kelen-Tudos and Finman-Ross graphical procedures . The derived reactivity ratios (r1 , r2 ) are : (0.51 , 4.85) for (VP / AA ) systems and (0.34 , 7.58) for (VP , MMA) systems , and found the reactivity ratios of the monomer AA , MMA is mor than the monomer VP in the copolymerization of (VP / AA) and (VP /MMA) systems respectly . The reactivity ratios values were used for microstructures calculation.


Article
Determination of Advanced Oxidation Protein Products, E3 SUMO-Protein Ligase NSE2[NSMCE2], as a Marker to Predict Child Acute Lymphoblastic Leukemia
تقدير تركيز نواتج الاكسدة العالية البروتين AOPP)) وانزيم E3 SUMO-Protein Ligase NSE2[NSMCE2] في الاطفال المصابين بسرطان الدم الليمفاوي الحاد

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Acute lymphoblastic leukemia (ALL) is a cancer of the blood and bone marrow (spongy tissue in the center of bone). In ALL, too many bone marrow stem cells develop into a type of white blood cell called lymphocytes. These abnormal lymphocytes are not able to fight infection very well. The aim of this study was to investigate possible links between E3 SUMO-Protein Ligase NSE2 [NSMCE2] and increase DNA damage in the childhood patients with Acute lymphoblastic leukemia (ALL). Laboratory investigations including hemoglobin(Hb) ,white blood cell (WBC) , serum total protein , albumin ,globulin , in addition to serum total antioxidant activity (TAA) , Advanced oxidation protein products(AOPP) and E3 SUMO-Protein Ligase NSE2[NSMCE2]. Blood samples were collected from 60 patients diagnosed to Acute lymphoblastic leukemia (ALL) after one month treatment with induction therapy. Age and sex matched 30 healthy persons selected as control. serum total protein , albumin and globulin showed A significant decrease in patients group when compared to control group( P<0.01,P<0.05and P <0.05)respectively, total antioxidant activity (TAA) showed A significant decrease in patients group when compared to control group( P<0.001), while AOPP,NSMCE2 , showed a significant increase in patients group in comparison to control group ( P<0.001).Conclusions: The results from this study showed a significant increase in NSMCE2, AOPP, NSMCE2 /TAA ratio ,NSMCE2/S. protein ratio and AOPP/ S.Protein ratio. These results in the present study are shown for the first time to the best of our knowledge. These parameters may play a role in developments of change DNA damage in the childhood patients with Acute lymphoblastic leukemia (ALL)


Article
Exploiting the diazotization reaction of 4- minoacetophenone for Methyldopa determination.
استكشاف تفاعل الازوتة ل4-امينو اسيتوفينون لتقدير عقار المثيل دوبا

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Based on the diazotization reaction of 4-aminoacetophenone with sodium nitrite in acid medium to form diazonium salt, which was coupled with Methyldopa to form a violet reddish soluble azo dye with maximum absorbance at 560 nm,a batch procedure had been developed for the estamination of Methyldopa. Under optimum experimental parameters affecting on the development and stability of the colored product, Beer´s law obeyed in the range (0.5-45) μg.ml-1 with a correlation coefficient (0.9979).The proposed method was successfully applied to the determination of Methyldopa in either pure form and in commercial brands of pharmaceuticals, no interference was observed from common excipients in the formulations. The analytical results obtained by applying this method were in good agreement with labeled values.


Article
With Solvent Extraction Method, and via new Organic Reagent 2-(Benzo thiazolyl azo)-4,5- Diphenyl Imidazole for Spectrophotometric Determination of Copper (II) in different Samples
بواسطة طريقة الاستخلاص بالمذيب وباستخدام الكاشف العضوي الجديد 2-[بنزوثيازوليل ازو]-5,4-ثنائي فنيل اميدازول للتقدير الطيفي للنحاس (II) في نماذج مختلفة

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The new organic reagent 2-[Benzo thiazolyl azo]-4,5-diphenyl imidazole was prepared and used as complexing agent for separation and spectrophotometric determination of Cu2+ ion in some samples include plants, soil, water and human blood serum. Initially determined all factors effect on extraction method and the results show optimum pH was (pHex=9), optimum concentration was 40μg/5mLCu2+ and optimum shaking time was (15min.), as well stoichiometry study appears the complex structure was 1:1 Cu2+: BTADPI. Interferences effect of cations were studied. Synergism effect shows MIBK gave increasing in distribution ratio (D). Organic solvent effect appears there is no any linear relation between dielectric constant for organic solvent used and distribution ration (D). Thermodynamically found the reaction was Endothermic reaction, with ΔHex= 0.0131 KJ.mole-1,ΔGex=-54.20 KJ.mole-1 ,ΔSex= 167.84 J.mole-1.Beer’s law was obeyed over the concentration 1-30μg/5mL, and ε=922.90 Lmol-1.cm-1,with detection limit 1.7×10-5and Sandell’s sensitivity 6.8× 10-7 gcm-2.


Article
Preparation and Characterization of Some Transition Metal Complexes with ( N ,S ,O) New Schiff Base Ligand
تحضير وتشخيص معقدات بعض العناصر الانتقالية مع ليكاند قاعدة شف الجديدة المانحة من (N, S, O)

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The New Schiff base ligand 4,4'-[(1,1'-Biphenyl)-4,4'-diyl,bis-(azo)-bis-[2-Salicylidene thiosemicarbazide](HL)(BASTSC)and its complexes with Co(II), Ni(II), and Cu(II) were prepared and characterized by elemental analysis, electronic, FTIR, magnetic susceptibility measurements. The analytical and spectral data showed, the stiochiometry of the complexes to be 1:1 (metal: ligand). FTIR spectral data showed that the ligand behaves as dibasic hexadentate molecule with (N, S, O) donor sequence towards metal ions. The octahedral geometry for Co(II), Ni(II), and Cu(II) complexes and non electrolyte behavior was suggested according to the analysis data.


Article
An Approximated Solutions for nth Order Linear Delay Integro-Differential Equations of Convolution Type Using B-Spline Functions and Weddle Method
الحلول التقريبية للمعادلات التفاضلية- التكاملية التباطؤية الألتفافية الخطية من الرتبة n باستخدام الدوال الثلمة التوصيلية و طريقة ويدل

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The paper is devoted to solve nth order linear delay integro-differential equations of convolution type (DIDE's-CT) using collocation method with the aid of B-spline functions. A new algorithm with the aid of Matlab language is derived to treat numerically three types (retarded, neutral and mixed) of nth order linear DIDE's-CT using B-spline functions and Weddle rule for calculating the required integrals for these equations. Comparison between approximated and exact results has been given in test examples with suitable graphing for every example for solving three types of linear DIDE's-CT of different orders for conciliated the accuracy of the results of the proposed method.


Article
On Strongly F – Regular Modules and Strongly Pure Intersection Property
المقاسات قوية النقاء من النمط F وخاصية التقاطع قوي النقاء

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A submoduleA of amodule M is said to be strongly pure , if for each finite subset {ai} in A , (equivalently, for each a A) there exists ahomomorphism f : M A such that f(ai) = ai, i(f(a)=a). A module M is said to be strongly F–regular if each submodule of M is strongly pure . The main purpose of this paper is to develop the properties of strongly F–regular modules and study modules with the property that the intersection of any two strongly pure submodules is strongly pure .


Article
On Solving Hyperbolic Trajectory Using New Predictor-Corrector Quadrature Algorithms
حل مسار القطع الزائد بأستخدام خوارزميات التخمين – التصحيح التربيعية الجديدة

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In this Paper, we proposed two new predictor corrector methods for solving Kepler's equation in hyperbolic case using quadrature formula which plays an important and significant rule in the evaluation of the integrals. The two procedures are developed that, in two or three iterations, solve the hyperbolic orbit equation in a very efficient manner, and to an accuracy that proves to be always better than 10-15. The solution is examined with and with grid size , using the first guesses hyperbolic eccentric anomaly is and , where is the eccentricity and is the hyperbolic mean anomaly.

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