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Evaluation Study of Three Diagnostic Methods for Helicobacter pylori Infection最新文献

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Studying antioxidant, anti-inflammatory activities and antimicrobial of Iron nanoparticles biosynthesized from water extract of Mentha pulegium L 研究了薄荷水提物生物合成铁纳米颗粒的抗氧化、抗炎和抗菌活性
S. Ahmed
Biosynthesis of Iron nanoparticles from Mentha pulegium L by simple method by using waterextract of Mentha pulegium L. The iron nanoparticles characterized by UV-visiblespectroscopy, (FTIR) Fourier transform infrared spectroscopy, XRD and Scanning electronmicroscopy (SEM). The biological activity evaluation by anti-inflammatory and anti oxidantusing evaluated in vitro 2,2-diphenyl-1- picrylhydrazyl (DPPH) assay, ABTS radicalscavenging assay assay Iron chelating activity assay . The results also revealed that the waterextract of Mentha pulegium L and its iron nanoparticles represented the most potent in vitroantioxidant effect. Iron nanoparticles inhibited the growth of bacterial and fungal, theseresults suggested that iron nano particle could be an interesting to control pathogenic microorganisms.
以薄荷水提物为原料,通过紫外可见光谱(uv -可见光谱)、傅里叶变换红外光谱(FTIR)、x射线衍射(XRD)和扫描电镜(SEM)对纳米铁进行了表征。体外2,2-二苯基-1-苦味酰肼(DPPH)自由基清除试验、ABTS自由基清除试验、铁螯合活性试验对其抗炎和抗氧化活性进行了评价。结果还表明,薄荷水提物及其铁纳米颗粒的体外抗氧化作用最强。铁纳米颗粒抑制细菌和真菌的生长,提示铁纳米颗粒可能是控制病原微生物的一种有趣的方法。
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引用次数: 1
Effect of overlap technique on hardness and fatigue behavior in ND-Glass laser heat treatment of carbon steel 重叠工艺对碳钢ND-Glass激光热处理硬度和疲劳性能的影响
S. K. Al-ani, N. A. Khattab
The engineer faced a state where it is desirable that the component should have a surface properties differing from those of its interior, therefore core with high strength and sufficient toughness, to take up the mechanical forces combined with high surface hardness to combat wear are needed. This requirement cannot be satisfied by one material (1,2). The direction is turned to surface treatment as the only means of achieving this ends.
工程师面临着这样一种状态,即部件的表面特性与其内部特性不同,因此需要具有高强度和足够韧性的芯材,以承受机械力和高表面硬度来对抗磨损。这一要求不能由一种材料(1,2)来满足。方向转向表面处理作为实现这一目的的唯一手段。
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引用次数: 0
ʎ BC-Open Sets And Topological Properties [bc]开集和拓扑性质
Sarhad F. Namiq
In this paper we introduce the concept ofc-open sets in topological spaces and study topological properties ofc-derived,c-closure andc-interior of a set using the concept ofc-open sets.
本文在拓扑空间中引入了 c-开集的概念,并利用c-开集的概念研究了集的c-衍生、c-闭包和c-内部的拓扑性质。
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引用次数: 6
Improvement of chemical, thermal, and mechanical properties of Polypropylene (PP) - Cellulose microcrystalline composites (CMC) 聚丙烯(PP) -纤维素微晶复合材料(CMC)化学、热、机械性能的改进
E. Khalaf, S. Awad, Ashna A Arkawazi
A research paper focuses on investigations of the improvements on chemical and thermal, andmechanical properties of polypropylene (PP) by adding cellulose microcrystalline fillers (CMC).The CMC powder was used as reinforcement in pure PP with various weight percentages 5, 10and 20 % respectively. The melt mixing process was used to prepare (PP/ CMC) composites. Thestructural changes of PP/CMC composites were investigated by Fourier transform infrared(FTIR) spectra. The results of the Thermogravimetric analysis (TGA) exhibited that the higheraddition of 20% CMC into the pure PP slightly improved both the residue yields and thermalstability. The tensile strength of 20% CMC into pure PP was slightly increased and elongationreduced, compared with pure PP.
研究了纤维素微晶填料(CMC)对聚丙烯(PP)化学性能、热性能和力学性能的改善作用。将CMC粉末分别以5、10、20%的质量百分比作为纯PP的补强剂。采用熔融混合法制备(PP/ CMC)复合材料。利用傅里叶红外光谱(FTIR)研究了聚丙烯/CMC复合材料的结构变化。热重分析(TGA)结果表明,在纯PP中添加20%的CMC可略微提高残渣收率和热稳定性。与纯PP相比,20% CMC制成纯PP的拉伸强度略有提高,伸长率略有降低。
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引用次数: 0
On Red-Supplemented Modules, Weak Red-Supplemented Modules and Completely Weak Red-Supplemented Modules 论补红模块、弱补红模块和完全弱补红模块
A. Jabbar, B. Rahim
In this paper some results that concerning localization of modules are proved. Italso, studies the effect of localization on certain types of modules such assupplemented modules, weak supplemented modules and completelyweak supplemented modules. Several conditions are given under whichcertain properties of such types of algebraic structures are preserved underlocalization.
本文证明了有关模块局部化的一些结果。研究了定位对补充模块、弱补充模块和完全弱补充模块等特定类型模块的影响。给出了这类代数结构在欠局域下保持某些性质的几个条件。
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引用次数: 0
Nuclear localization signals, genetic characterisation and morphological study of wild type and 14 Arabidopsis mutant lines 拟南芥野生型和14个突变系的核定位信号、遗传特征和形态研究
Asaad M Mahmood, J. Dunwell
2-oxoglutarate-dependent (2-OG) dioxygenases [2(OG)-dioxygenases] are distributed in a widerange of prokaryotes and eukaryotes, and are involved in many different important biologicalactivities, for example biosynthesis of plant products including plant hormones and antioxidants,posttranslational modification, DNA/RNA damage repair and in certain organisms modulationsof epigenetic modifications. These 2(OG) dioxygenase enzymes contain a characteristic iron (Fe)-binding active site. To understand their role in modulating mechanisms against unfavourableconditions, the present study examined nuclear localization signal (NLS), genetic status,phenotypic patterns of 14 T-DNA mutants of Arabidopsis containing an insert in their (2-OG)dioxygenase genes. Results showed that predicted localizations of proteins encoded byrespective genes varied according to four different methods used in this analysis; seven, three,one and one of them were predicted to be located in the nucleus according to the four methods,respectively. Moreover, genotypic analysis confirmed the homozygosity of plant(s) of nine ofthese mutant lines [N671573 (insert in At1g20270), N668172 (At1g68080), N652869(At2g17720), N679576 (At3g06290), N678627 (At3g28490), N338446 (At4g35810), N683883(At4g35820), N666896 (At5g18900), N598611 (At5g66060)] and phenotypic analysis includingvegetative, siliques and seed characteristics of those plants showed different characteristicseither within each mutant (homozygous and heterozygous), or between mutants and the WT.
2-氧葡萄糖酸盐依赖(2-OG)双加氧酶[2(OG)-双加氧酶]广泛分布于原核生物和真核生物中,并参与许多不同的重要生物活性,例如植物产品的生物合成,包括植物激素和抗氧化剂,翻译后修饰,DNA/RNA损伤修复以及某些生物的表观遗传修饰调节。这些2(OG)双加氧酶含有一个特征的铁(Fe)结合活性位点。为了了解它们在逆境调节机制中的作用,本研究检测了14个含有(2-OG)双加氧酶基因插入的拟南芥T-DNA突变体的核定位信号(NLS)、遗传状态和表型模式。结果表明,在本分析中使用的四种不同方法中,各自基因编码的蛋白质的预测定位存在差异;根据这四种方法分别预测有7个、3个、1个和1个原子位于原子核中。此外,基因型分析证实了其中9个突变系[N671573(插入At1g20270)、N668172(插入At1g68080)、N652869(插入At2g17720)、N679576(插入At3g06290)、N678627(插入At3g28490)、N338446(插入At4g35810)、N683883(插入At4g35820)、N666896(插入At5g18900)、N598611(插入At5g66060)]的植株的纯合子性,表型分析显示,这些植株的营养性状、丝质性状和种子性状在每个突变株(纯合子和杂合子)中都表现出不同的特征。或者突变体和WT之间的关系。
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引用次数: 1
Numerical study of Single-turn and Multi-turn coil effect in the induction heating process 感应加热过程中单匝和多匝线圈效应的数值研究
A. Shokri, H. Heydari, Muhammed Jameel M Asaad
Induction heating has an important role in the industrial applications. Atypical induction heating system has three main parts where they are electricalsource, the RF-coil and work piece. The RF-coil is one of the importantparameters in setup of induction heating system. In this paper, we have beenstudied two kinds of coil (Single-turn and Multi-turn) using Finite ElementMethod (FEM) and by COMSOL MULTIPHYICS package. The results showthat considering of each of this coil has significant effect on theelectromagnetic fields, eddy currents and generated heat in the coil and workpiece.
感应加热在工业应用中具有重要的作用。非典型感应加热系统主要有三个部分:电源、射频线圈和工件。射频线圈是感应加热系统设置中的重要参数之一。本文采用有限元法(FEM)和COMSOL multiphysics软件包对单匝和多匝两种线圈进行了研究。结果表明,考虑每个线圈对线圈和工件内的电磁场、涡流和产生的热量有显著的影响。
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引用次数: 0
Generalization of (0,2,5)Lacunary interpolation by sixtic splines on uniform meshes 均匀网格上六样条(0,2,5)插值的推广
R. G. Karem
A solid-state lubricant powders is one of the most significant powders usedto protect surfaces from damage in cases of relative motion, with a reduction in thefriction and wear between them. In this study, molybdenum disulfide (MoS2),purity 99%, nanoparticles have been used as solid-state lubrication, due to it havinga low coefficient of friction and high wear resistance. In which MoS2 particles havebeen distributed with 1.69 x 1015 particles per m2 over the steel disc’s surfaceagainst the steel pin using a pin on disc tribometer machine. The pin on disctechnique was used to study the friction coefficient behaviour of the MoS2distribution particles and the position depth of the steel pin on the steel disc surfacewhen the ambient environment was air and humidity. It was used to examine thetribological behaviour of the steel pin on the steel disc surface with no distributionof MoS2 nanoparticles and also for a steel pin on steel disc with a distribution ofMoS2 nanoparticles. Then, the morphologies and microstructures of thedistributions of MoS2 nanoparticles were characterized using Scanning ElectronMicroscopy (SEM). In a result, the distribution of MoS2 nanoparticles have resultedin a lower friction coefficient and higher wear resistance compared with only steelpin on steel disc surfaces.
固体润滑剂粉末是最重要的粉末之一,用于在相对运动的情况下保护表面免受损害,减少它们之间的摩擦和磨损。在本研究中,纯度为99%的二硫化钼(MoS2)纳米颗粒由于具有低摩擦系数和高耐磨性而被用作固态润滑剂。其中,二硫化钼颗粒分布为1.69 x 1015颗粒/ m2,在钢盘的表面上,使用针盘摩擦试验机对钢销进行摩擦。采用针盘技术研究了空气和湿度条件下mos2分布颗粒的摩擦系数行为和针盘在钢盘表面的位置深度。它被用来检查钢销在没有MoS2纳米粒子分布的钢盘表面上的摩擦学行为,也用于钢销在有MoS2纳米粒子分布的钢盘上的摩擦学行为。然后,利用扫描电子显微镜(SEM)对二硫化钼纳米颗粒的形貌和微观结构进行了表征。结果表明,纳米二硫化钼在钢盘表面的分布比钢销表面具有更低的摩擦系数和更高的耐磨性。
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引用次数: 1
Antibacterial evaluation of Some Synthesis Complexes of Azo-dye Ligands. 偶氮染料配体合成配合物的抗菌评价。
Rahman MohameedMurad, A. Hasan, Ro Kareem
In present work, two ligands, azo Schiff-base (AZD1 and AZD2), were synthesized by twosteps. Firstly, Schiff-bases were prepared by condensation of Salicyldehyde with anthranilic acid, followed by diazotization of aromatic amines and their subsequent coupling reaction with Schiff-bases. Consequently, 8 complexes of the type [M(AZD1)Cl2] and [M(AZD2)Cl2], where M = Cu(II), Ni(II), Co(II), Mn(II); were synthesized and characterized with the help of molarconductance, magnetic susceptibility measurements, FT-IR, micro elemental analysis , H1 NMR,and Uv–visible spectroscopy. The spectral data revealed that the ligands act as bidentate ligand,the hydroxyl of carboxylic group and the azo group in AZD1 and hydroxyl of phenyl group andthe azomethin group in AZD2 ligand are co-ordination to the central metal atoms. Lastly, all thecompounds were screened for their antibacterial activity, using well-diffusion method. Inconclusion, the ligands and some of the complexes exhibited appreciable antibacterial activityagainst Escherichia coli Klebsiella pneumonia and Staphylococcus haemolyticus andStaphylococcus aurous.
本文采用两步法合成了偶氮希夫碱(AZD1和AZD2)两种配体。首先,水杨醛与邻氨基苯甲酸缩合制备希夫碱,然后将芳香胺重氮化,并与希夫碱偶联。结果得到8种类型的配合物[M(AZD1)Cl2]和[M(AZD2)Cl2],其中M = Cu(II), Ni(II), Co(II), Mn(II);采用摩尔电导、磁化率、傅里叶变换红外光谱、微量元素分析、H1核磁共振和紫外可见光谱等手段对其进行了表征。光谱数据表明,该配体为双齿配体,AZD1中羧基和偶氮基的羟基以及AZD2中苯基和偶氮基的羟基与中心金属原子配位。最后,采用孔扩散法对化合物进行抑菌活性筛选。综上所述,该配体及部分配合物对大肠杆菌、肺炎克雷伯菌、溶血葡萄球菌和金黄色葡萄球菌具有明显的抑菌活性。
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引用次数: 0
A Rapid, Accurate and Easy Method for Determination of Trace Elements in Lubricating Oil Using ICP-OES ICP-OES快速、准确、简便地测定润滑油中微量元素
H. Noori, Azad Alshatteri, Nabil A. Fakhre
A procedure of extraction by emulsion breaking (EIEB) was developed for determination of trace elements in 10 different lubrication oil samples. It was based on the preparation of an emulsion followed by breaking the emulsion by centrifugation. The aqueous phase was extracted and collected for determination the trace elements using inductive coupled plasma – optical emission spectroscopy. The chemical and physical variables influencing the extraction were optimized. The LODs obtained were ranged from 1.2 µg L-1 to 5.8 µg L-1. The RSDs ranged from 1.1% to 6.7%. EIEB was suitable for determination of the analytes at µg L-1 levels in lubricants samples collected from several markets in Kalar and Sulaimani Cities
建立了破乳提取法(EIEB)测定10种润滑油样品中微量元素的方法。它是基于乳液的制备,然后通过离心打破乳液。采用电感耦合等离子体-光学发射光谱法对样品中的微量元素进行了提取和收集。对影响提取的理化因素进行了优化。lod范围为1.2µg L-1 ~ 5.8µg L-1。rsd范围为1.1% ~ 6.7%。EIEB适用于Kalar和Sulaimani市几个市场润滑油样品中µg L-1水平的分析物的测定
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引用次数: 3
期刊
Evaluation Study of Three Diagnostic Methods for Helicobacter pylori Infection
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