Al-Mustansiriyah Journal of Sciences最新文献_第9页

Affect the Cross Linking Degree and Polymer Composition on the Mechanical Properties of Poly (vinyl alcohol)/ Pullu-lan Films 交联度和聚合物组成对聚乙烯醇/普鲁兰薄膜力学性能的影响

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/MJS.V28I2.504

S. A. Soud

引用次数: 4

Estimation of Dual Polarization Weather Radar Variables 双极化天气雷达变量的估计

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/MJS.V28I2.492

Dalia A. Mahmood

{"title":"Estimation of Dual Polarization Weather Radar Variables","authors":"Dalia A. Mahmood","doi":"10.23851/MJS.V28I2.492","DOIUrl":"https://doi.org/10.23851/MJS.V28I2.492","url":null,"abstract":"Dual polarization weather radar has now become a widely used as instrument in meteorological offices around the world because of its capability in distinguishing different precipitation type and in improving the accuracy of quantitative precipitation estimation. The aim of this work is to estimate the polarimetry radar variables for radars of different frequency bands and study their behavior with rainfall rates. \u0000Calculations of polarimetry radar variables were made on the basis of several assumptions. The results showed that factors at horizontal and vertical polarization, ZH,V, ranges between 20 dBz respectively, and more than 55 dBz for light rain and extreme heavy rain respectively, and radar reflectivity factor at horizontal ZH is greater than radar reflectivity factor at vertical ZV for all rainfall rates. The differential reflectivity, ZDR, also increases with increasing rainfall rates since it is the difference between ZH and Zv. \u0000Calculations of specific differential attenuation indicated that X band radars are seriously atten-uated by rain and C band radars are less affected by rain. The specific differential attenuation, S band radars is very small. In addition to this feature, the results showed that the differential phase shift between return signals of horizontal and vertical polarizations for S band radars is much less than those for C and X band radars, and also, the results showed that the co-polarization correlation coefficient for S band the radars is much higher than those of C and X bands. \u0000In order to investigate the accuracy of the calculated polarimetric weather radar variables per-formed in this research, real radar measurements were used for this purpose. Results indicated that the range of values for calculated polarimetric radar variables are very consistent with range of values for measured variables","PeriodicalId":7515,"journal":{"name":"Al-Mustansiriyah Journal of Sciences","volume":"21 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75417489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Structural, Optical, and Morphological Properties of the Cadmium Oxide Thin Film Taif S. Almaadhede 氧化镉薄膜的结构、光学和形态学性质[j]

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/MJS.V28I2.515

Taif S. Almaadhede

引用次数: 0

Preparation and Characterization of TiO2 Nanostructure by TiCl4 Hydrolysis with Additive NaOH NaOH助剂水解TiCl4制备TiO2纳米结构及表征

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/MJS.V28I2.506

R. Rasheed

引用次数: 3

Synthesis, Characterization and Kinetic Study of Monomeric Complexes of Cyclohexane-1, 2- bis (Thiosemicarbazone) with Cobalt (II), Nickel (II) and Copper (II) 钴(II)、镍(II)、铜(II)环己烷- 1,2 -双(硫代氨基脲)单体配合物的合成、表征及动力学研究

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/mjs.v28i2.499

A. Ali

引用次数: 1

Lead Level in Pregnant Women Suffering from Pre- Ec-lampsia in Baghdad City- Iraq 伊拉克巴格达市患先兆子痫孕妇的铅水平

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/MJS.V28I2.493

A. H. Al-Shammery

{"title":"Lead Level in Pregnant Women Suffering from Pre- Ec-lampsia in Baghdad City- Iraq","authors":"A. H. Al-Shammery","doi":"10.23851/MJS.V28I2.493","DOIUrl":"https://doi.org/10.23851/MJS.V28I2.493","url":null,"abstract":"This study was conducted on the number of pregnant women suffering from symptoms of preeclampsia who live in different areas in Baghdad city. These areas were suffering from air pol-lution by different pollutants in high rates and it was chosen from among these pollutants lead metal which is a high percentage of air pollution where it was observed by measuring the level of lead in blood serum which taken from pregnant women by 40 pregnant women suffering from symptoms of preeclampsia and 20 pregnant women don't suffering from any abnormal symptoms during pregnancy period and classified as control group , so we found marked a significant rise in lead level in comparison with control group reaching ratio of lead in blood of pregnant women which suffering from symptoms of preeclampsia 38.44 mg/dl ± 3.0 mg/dl in comparison with con-trol group which 14.56 mg/d l± 2.50 mg/dl,this increase may refer to the amount of lead which found in the air and in excess of the normal limit which exposed pregnant women like all people through the overcrowding of roads and use fuel non-environmentally friendly through breathing which effect on pregnant women health, it has been shown on symptoms of preeclampsia from measuring systolic and diastolic blood pressure and measuring of urea in blood, T-test was used at possibility of(0.001)to see the difference between infected samples and control group, therefore this study suggested that a lead is one of the causes of preeclampsia because live in polluted and unhealthy environment. (pt space line","PeriodicalId":7515,"journal":{"name":"Al-Mustansiriyah Journal of Sciences","volume":"96 1","pages":"7-10"},"PeriodicalIF":0.0,"publicationDate":"2018-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73856003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and Identification of Heterocyclic Compounds (Oxazepine, Tetrazole) Derived from Benzidine as Photostabilizing for Poly vinyl chloride 联苯胺衍生杂环化合物(恶氮平、四氮唑)在聚氯乙烯光稳定剂中的合成与鉴定

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/MJS.V28I2.521

O. A. Nief

{"title":"Synthesis and Identification of Heterocyclic Compounds (Oxazepine, Tetrazole) Derived from Benzidine as Photostabilizing for Poly vinyl chloride","authors":"O. A. Nief","doi":"10.23851/MJS.V28I2.521","DOIUrl":"https://doi.org/10.23851/MJS.V28I2.521","url":null,"abstract":"This research describes preparation of new four compounds (A2-A5) having 1,3-oxazepine and Tetrazole rings. The first step involves reaction of benzidine (A1) with aromatic aldehyde (cinnamaldehyde) in ethanol as a solvent in the presence of acid as catalyst to yield the Schiff base (A2), Schiff base (A2) was condensed with maleic anhydride and phthalic anhydride in dry benzene to give a seven-membered heterocyclic ring derivative (A3, A4), In addition, we synthesis novel tetrazole derivative (A5) from the reaction of Schiff base (A2) with sodium azide in tetrahydrofuran. The structure of synthesized compounds were identified by spectral methods [FTIR, ¹H-NMR, and ¹³C-NMR] and measurement physical properties. The photo stabilization of poly (vinyl chloride) films by compounds (A1-A5) was studied. The Photostabilization activities of these compounds were determined by monitoring the carbonyl and hydroxyl indexes values with irradiation time. The changes in viscosity average molecular weight of PVC with irradiation time were studied by using tetrahydrofuran as a solvent. The influence of concentrations additives (range 0.1-0.5wt) on the rate of photodegradation and Photostabilization course was studied. Therefore, we found that was an increase Photostabilization rates with increasing concentrations of additives. In addition, Studying the effect of film thickness and the results showed that an increase in film thickness would reduce the rate of photolysis. The results indicated that Photostabilisation proportion of plastic in the presence of additives follow the trend: (PVC blank) > PVC+A1> PVC+A2 > PVC+A5> PVC+A4> PVC+A3. According to the results obtained, it proposed mechanisms depending on the structure of the additive.","PeriodicalId":7515,"journal":{"name":"Al-Mustansiriyah Journal of Sciences","volume":"44 1","pages":"108-118"},"PeriodicalIF":0.0,"publicationDate":"2018-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80793292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Studying the Effect of Titania Additions on some properties of Porcelain 研究二氧化钛添加量对陶瓷某些性能的影响

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/MJS.V28I2.513

A. Saadon

引用次数: 0

Study Stopping Power Collision in one of Nuclear Element 停止核动力碰撞的研究

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/mjs.v28i2.519

S. G. Hassan

引用次数: 0

Theoretical Study and Biological Activity of Co(II), Ni(II), Cu(II),Pd(II),Pt(IV) and Cd(II) Complexes with2-Thioxoimidazolidin-4-one Derivative Co(II)、Ni(II)、Cu(II)、Pd(II)、Pt(IV)、Cd(II)与2-硫氧咪唑烷-4- 1衍生物配合物的理论研究及生物活性

Al-Mustansiriyah Journal of Sciences Pub Date : 2018-04-11 DOI: 10.23851/MJS.V28I2.501

S. Abdullah

{"title":"Theoretical Study and Biological Activity of Co(II), Ni(II), Cu(II),Pd(II),Pt(IV) and Cd(II) Complexes with2-Thioxoimidazolidin-4-one Derivative","authors":"S. Abdullah","doi":"10.23851/MJS.V28I2.501","DOIUrl":"https://doi.org/10.23851/MJS.V28I2.501","url":null,"abstract":"The workcontains a theoretical treatment of the preparedligand(3-{[(Z)-(4-nitrophenyl) methyli -dene]amino}-2-thioxoimidazolidin-4-one)[L] and their metal complexes[S1-S6]in the gas phase. Hyperchem-8 program has been used to determined structural geometries of ligand and their met-al complexes. The electrostatic potential(Ep)of the ligand was calculated,furthermore binding en-ergy(ΔEb),the heat of formation(ΔHf),vibration spectra and bond length for the ligand and their metal co -mplexes were calculated by PM3methods at 298K°. The theoretically calculateddata were agreed with those found experimentally. The antibacterial activity for free ligand and its metal complexes(S1-S6)were studied against two selected micro-organisms [(Staphylococcusau-reus) as gram positive]and [(Escherichiacoli)as gram negative]. The minimal inhibitory concen-trations(MIC)have been also studied to determine the low concentration for inhibition. The anti-biotics (Amoxcillin and Ampicillin) have been chosen to compare their activity with those of the new compounds. Furthermore the antif -ungal activity against two microorganisms (Candidaalbi-cans) and (Aspergillusflavus) were studied for all compounds. The results showed great activity of the complexes relative to that of free ligand.","PeriodicalId":7515,"journal":{"name":"Al-Mustansiriyah Journal of Sciences","volume":"3 1","pages":"64-72"},"PeriodicalIF":0.0,"publicationDate":"2018-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83362853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0