Iraqi Journal of Science最新文献_第5页

Antimicrobial Activity of Geobacillus thermoleovorans Ir1 Active Compounds against Pathogenic Bacteria 热oleovorans 土杆菌 Ir1 活性化合物对病原菌的抗菌活性

Iraqi Journal of Science Pub Date : 2024-03-29 DOI: 10.24996/ijs.2024.65.3.10

M. Mahdi, H. K. Ibrahim, Dhafar N. Al-ugaili

{"title":"Antimicrobial Activity of Geobacillus thermoleovorans Ir1 Active Compounds against Pathogenic Bacteria","authors":"M. Mahdi, H. K. Ibrahim, Dhafar N. Al-ugaili","doi":"10.24996/ijs.2024.65.3.10","DOIUrl":"https://doi.org/10.24996/ijs.2024.65.3.10","url":null,"abstract":" It is necessary to follow new strategies for the isolation of bacteria with unique characteristics from novel sources during the search for new antimicrobial compounds. Geobacillus thermoleovorans strain Ir1 (JQ912239), a novel thermophilic bacterium, which was isolated from soil in Iraq (Basrah and Baghdad) showed a good ability to utilize hydrocarbon compounds. This study objective was to demonstrate G. thermoleovorans Ir1 potential antibacterial capabilities. The ability of the spore-forming bacterium G. thermoleovorans Ir1 to produce antimicrobial bioactive compounds that affects two pathogenic bacteria Pseudomonas aeruginosa and Staphylococcus aureus was investigated. The zones of inhibition were 16 mm and 15mm respectively. Extracted bioactive compounds were identified using gas chromatography-mass spectrometry (GC-MS) analysis. The results showed that this strain inhibited the growth of the tested bacteria. The antimicrobial activity of the strain might be due to the combination between formamide and 2, 2-bis-(4-hydroxyphenyl)-butane compounds as prodrugs by comparing the gas chromatography-mass spectrometry analysis of the pure and mixed extracts.. Moreover, the filtrate of the thermophilic G. thermoleovorans Ir1 was examined for inhibition of biofilms formed by pathogenic bacteria, the results showed that the filtrate was able to inhibit the biofilms of P. aeruginosa, S. aureus, B. subtillus, K. pneumonia, and E. coli.. The results of this study are the first to record the the production of these bioactive substances by the thermophilic G. thermoleovorans Ir1 at 65°C.","PeriodicalId":14698,"journal":{"name":"Iraqi Journal of Science","volume":"58 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367767","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

Indications for the Substantial Predominance of Short-Range Effects on Inelastic Coulomb Form Factors for Various States in the 26Mg Nucleus 关于 26Mg 核中各种状态的非弹性库仑形式因子的短程效应占主导地位的迹象

Iraqi Journal of Science Pub Date : 2024-03-29 DOI: 10.24996/ijs.2024.65.3.16

A. Al-Rahmani, Sanna N. Fadhil, A. Hamoudi

{"title":"Indications for the Substantial Predominance of Short-Range Effects on Inelastic Coulomb Form Factors for Various States in the 26Mg Nucleus","authors":"A. Al-Rahmani, Sanna N. Fadhil, A. Hamoudi","doi":"10.24996/ijs.2024.65.3.16","DOIUrl":"https://doi.org/10.24996/ijs.2024.65.3.16","url":null,"abstract":" Short-range effects on C2, C3, as well as C4 form factors in the 26Mg nucleus, were examined. The charge density distribution in this nucleus was also tested by means of one and two body fragments of cluster enlargement in cooperation with single-particle wave functions of harmonic potential. The correlation of Jastrow form was employed to inset the influence of short-range into the two body fragment of cluster enlargement. The nucleus of 26Mg was assumed to own a 16O-core with (A-16) nucleons dispersed over the sd-model space. The form factors in 26Mg nucleus ascend from the core-polarization and model space involvements. The form of Tassie model, subject to the charge density, was used to determine the transition density of core polarization. The one body density matrix elements required for determining the transition density of model space for various transitions in 26Mg were found via carrying out shell model computations using the OXBASH program with the universal-sd interaction of Wildenthal. The present calculations were subjected to the oscillator and correlation parameters symbolized by and respectively. These parameters are self-sufficiently generated for every specific nucleus by fitting between the calculated and observed elastic form factors. For determining the charge density, elastic form factors and inelastic Coulomb form factors for dissimilar excited states in 26Mg, one value is needed for and This study shows indications for the substantial predominance of short-range influences on current computations, where considering these influences look to be requisite for carrying out a distinguished adjustment in calculated results which ultimately leads to a remarkable explication of the data throughout all the considered momentum transfers.","PeriodicalId":14698,"journal":{"name":"Iraqi Journal of Science","volume":"51 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367883","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

Numerical Solution of Linear Volterra Integral Equation of the Second Kind with Delay Using Lagrange Polynomials 使用拉格朗日多项式数值求解带延迟的线性 Volterra 第二类积分方程

Iraqi Journal of Science Pub Date : 2024-03-29 DOI: 10.24996/ijs.2024.65.3.30

Iman A. Dhari, Muna M. Mustafa

引用次数: 0

Effect of Order of Reagents Addition on Optical and Structural Properties of CdS Quantum Dot Prepared by Chemical Bath Deposition Technique 试剂添加顺序对化学浴沉积技术制备的 CdS 量子点的光学和结构特性的影响

Iraqi Journal of Science Pub Date : 2024-03-29 DOI: 10.24996/ijs.2024.65.3.1

F. Nwabue, E. Oroke, D. Onah, F. Nworie, I. I. Ikele

{"title":"Effect of Order of Reagents Addition on Optical and Structural Properties of CdS Quantum Dot Prepared by Chemical Bath Deposition Technique","authors":"F. Nwabue, E. Oroke, D. Onah, F. Nworie, I. I. Ikele","doi":"10.24996/ijs.2024.65.3.1","DOIUrl":"https://doi.org/10.24996/ijs.2024.65.3.1","url":null,"abstract":"Cadmium sulfide quantum dots were synthesized and deposited on glass substrates by chemical bath deposition (CBD) technique using cadmium sulfate and thiourea solutions in the presence of a 4,4’-(1,2-ethanediyldinitrilo)bis-(2-pentanone) (EDDBP) tetradentate ligand as a complexing agent. The order of reagents addition was varied to deposit films that were characterized for their surface morphological, optical, structural, and solid-state properties using a scanning electron microscope (SEM), a UV-visible spectrophotometer, an X-ray diffractometer (XRD), and Brunauer-Emmet-Teller (BET) analyses. The optimal condition for film deposition using the normal sequence of reagents addition was found at pH 8-12 and 298-353 ± 1K and gave films of 2.40-321.06 nm thickness, while the variation in the order of reagents addition gave improvements in the film properties. The optical properties and the observed direct band gaps (1.75-3.16 eV) of the films suggest usage in electroluminescent and solar cell devices since they have a first-order transition. The XRD patterns of the quantum dots indicated hexagonal wurzite structures, while the BET confirmed their mesoporous and nanonature.","PeriodicalId":14698,"journal":{"name":"Iraqi Journal of Science","volume":"26 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367049","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

Comparing the Effect of In2O3 and Eu2O3 Impurities on the Structural and Optical Properties of Cerium Oxide 比较 In2O3 和 Eu2O3 杂质对氧化铈结构和光学特性的影响

Iraqi Journal of Science Pub Date : 2024-03-29 DOI: 10.24996/ijs.2024.65.3.17

Mustafa M. Rasheed, Bushra A. Hasan

{"title":"Comparing the Effect of In2O3 and Eu2O3 Impurities on the Structural and Optical Properties of Cerium Oxide","authors":"Mustafa M. Rasheed, Bushra A. Hasan","doi":"10.24996/ijs.2024.65.3.17","DOIUrl":"https://doi.org/10.24996/ijs.2024.65.3.17","url":null,"abstract":" This work compares the changes in optical and structural properties of cerium oxide (CeO2) when doped with different concentrations (3%,5%,7%, and 9%) of two oxides, In2O3 and Eu2O3. X-ray diffraction and spectrophotometry were employed in the visible, ultraviolet, and near-infrared regions. The findings demonstrated that CeO2 doped with In2O3 and Eu2O3 thin films were polycrystalline and had a cubic structure. The crystal size increased from 20.5 to 32.15 when Eu2O3 doping ratio increased from 0% to 7% and then decreased to 28.46 nm at 9%. While the crystal size showed an increase from 20.5 to 21.42 nm with the increase of the In2O3 doping ratio, while the lattice constant measured for cubic CeO2 changed opposite to that. The optical measurement showed that Eu2O3 and In2O3 doped CeO2 thin films have a direct band gap with allowed transition with 3.0 eV for the undoped CeO2. The band gap energy changed in a non-regular manner with the increase of the doping ratio of both oxides. The minimum band gap energy was 1.2 eV obtained for 7% Eu2O3 doped CeO2 thin film, and the minimum band gap energy was 1.4 eV obtained for 9% In2O3 doped CeO2. These results qualify them for use as absorbers in solar cell applications.","PeriodicalId":14698,"journal":{"name":"Iraqi Journal of Science","volume":"43 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140368084","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

Single Stage Shrinkage Estimation Methods for Reliability Function of Generalized Exponential Distribution Using Simulation 利用模拟对广义指数分布可靠性函数进行单级收缩估计的方法

Iraqi Journal of Science Pub Date : 2024-03-29 DOI: 10.24996/ijs.2024.65.3.29

I. K. Ahmed, T. A. Taha, A. N. Salman

引用次数: 0

SYNTHESIS AND STUDY OF BIOLOGICAL ACTIVITIES OF2,6-DIARYLPIPERIDONE –y-DERIVATIVES 2,6-二芳基哌啶酮-y-衍生物的合成及生物活性研究

Iraqi Journal of Science Pub Date : 2024-03-20 DOI: 10.24996/iraqijournalofscience.v53i3.12732

K. Hamak, F. Kandil, S. Hamo

引用次数: 0

A HISTOLOGICAL STUDY ON THE EFFECT OF AQUEOUS EXTRACT OF Capsicum spp. ON Entamoeba histolytica IN ALBINO MICE. 关于辣椒属植物的水提取物对阿尔比诺鼠体内组织溶解性肠虫的影响的历史研究。

Iraqi Journal of Science Pub Date : 2024-03-20 DOI: 10.24996/iraqijournalofscience.v53i3.12747

Suhaila Mahmood, Ban Mohamed

引用次数: 0

ANTIBACTERIAL ACTIVITY OF RICINNUS COMMUNIS: IN VITRO STUDY 蓖麻的抗菌活性：体外研究

Iraqi Journal of Science Pub Date : 2024-03-20 DOI: 10.24996/iraqijournalofscience.v53i3.12750

Hayder M. Al-kuraishy, Salah Al-weendy, Ali k. Al-Buhadilly, Iman Al-bajajy, Ali Al-gareeb, Ammar Al-hafied

{"title":"ANTIBACTERIAL ACTIVITY OF RICINNUS COMMUNIS: IN VITRO STUDY","authors":"Hayder M. Al-kuraishy, Salah Al-weendy, Ali k. Al-Buhadilly, Iman Al-bajajy, Ali Al-gareeb, Ammar Al-hafied","doi":"10.24996/iraqijournalofscience.v53i3.12750","DOIUrl":"https://doi.org/10.24996/iraqijournalofscience.v53i3.12750","url":null,"abstract":"Ricinnus communis herb produces significant antimicrobial activity particularly against Gram negative bacteria, in comparison with standard antibiotics. Four bacterial genera were selected two Gram negative (Escherichia coli, and Pseudomonas aeruginosa); and two Gram positive (Staphylococcus aureus, Enterococcus fecalis). These bacterial isolates were incubated and subsequently adding Ricinus communis extracts which were prepared as alcoholic and aqueous solutions .The MIC (Minimal Inhibitory Concentration)was determined for ten isolates of each bacteria . Results showed that the MIC of aqueous extracts ranged between 8-32mg/ml for all selected bacteria while the MIC of the alcoholic extract ranged between 8-16mg/ml. Moreover; the lowest MIC of alcoholic extract was 8mg/ml while the lowest MIC for aqueous extract was 16mg/ml. In conclusion, the alcoholic and aqueous extract generates specific MIC, but the alcoholic extracts produce more particular effects by lower MIC (8 mg/ml). Thus; a topical application of these extracts are useful as alternative antimicrobial remedy regarding the sensitive bacteria.","PeriodicalId":14698,"journal":{"name":"Iraqi Journal of Science","volume":"7 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140227609","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

STUDYING INELASTIC TRANSVERSE ELECTRON SCATTERING FORM FACTORS OF THE ISOSCALAR TRANSITIONS IN 10B NUCLEUS 研究 10b 核中等速转变的非弹性横向电子散射形式因子

Iraqi Journal of Science Pub Date : 2024-03-20 DOI: 10.24996/iraqijournalofscience.v53i3.12755

Ban S. H. Al-qazaz

引用次数: 0