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Investigation of effect of antibacterial,antioxidant,and phytochemical factors of Ocimum basilicum extract on Escherichia coli and Staphylococcus aureus

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Food and Health 2022年第3期4卷 9-14页

作者： Fatemeh Fazli Mina Owrang ali ahmadi Department of Biological Sciences and Technologies Faculty of Basic SciencesIslamic Azad University Sari BranchSari ***Iran Department of Laboratory Sciences Faculty of Medical SciencesIslamic Azad University Sari BranchSari ***Iran Student Research Committee Faculty of Medical SciencesIslamic Azad University Sari BranchSari ***Iran.

The use of natural antibacterial compounds in tcontroling and eliminating pathogenic microorganisms including bacteria and fungi has been extensively evaluated.Plant extracts have been studied in the past years as antibacterial agents in medicine,plant pathology,and canned food,and unlike antibiotics,they do not cause drug resistance in pathogens.BHA(Beta-hydroxy acid)is a synthetic antioxidant with good fat solubility.Most of the extracted materials have antifungal,antiviral,and antibacterial properties.Different mechanisms of these act on bacteria and prevent their growth and multiplying.Many plants’extraction has phenolic active groups in their structures.Due to the importance and antimicrobial effects of essential oil and basil extract,the present study was performed to investigate the effect of different concentrations of basil extract on the growth of two bacterial pathogens Escherichia coli and Staphylococcus aureus.Also,the chemical composition of this plant extract and its antioxidant properties have been studied.The results of this study showed that basil extract,especially in 100 and 70%concentration,had antibacterial properties against Staphylococcus aureus but it does not show sufficient antimicrobial effect against Escherichia coli in the same dose.Analysis of chemical compounds in the extraction of this plant showed a total of 15 chemical compounds,most of which are related to the compounds neofitidine with concentration(41.44%),dimethylamino pentane with concentration(14.81%)and cyclohexane with concentration(91.9%).We also compared the antioxidant properties of basil extract with BHA and showed a significant difference in comparison with the inhibition of DPPH(2,2-Diphenyl-1-Picrylhydrazyl)formation by the extract and the standard BHA,so that the inhibition of DPPH by the standard BHA sample was significantly higher than the BHA.But basil extract showed good antioxidant properties equivalent to 400 mg/mL in 800 mg/mL BHA.

关键词： antioxidant anti-bacterial phytochemical Ocimum basilicum Escherichia coli Staphylococcus aureus

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Low-cost fault tolerance in evolvable multiprocessor systems:a graceful degradation approach

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第6期10卷 922-926页

作者： Shervin VAKILI Sied Mehdi FAKHRAIE Siamak MOHAMMADI ali ahmadi School of Electrical and Computer Engineering University of Tehran

The evolvable multiprocessor (EvoMP), as a novel multiprocessor system-on-chip (MPSoC) machine with evolvable task decomposition and scheduling, claims a major feature of low-cost and efficient fault tolerance. Non-centralized control and adaptive distribution of the program among the available processors are two major capabilities of this platform, which remarkably help to achieve an efficient fault tolerance scheme. This letter presents the operational as well as architectural details of this fault tolerance scheme. In this method, when a processor becomes faulty, it will be eliminated of contribution in program execution in remaining run-time. This method also utilizes dynamic rescheduling capability of the system to achieve the maximum possible efficiency after processor reduction. The results confirm the efficiency and remarkable advantages of the proposed approach over common redundancy based techniques in similar systems.

关键词：多处理器系统容错功能低成本进化容错方案执行程序系统级芯片任务分解

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Emotional evaluation of architectural interior forms based on personality differences using virtual reality

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Frontiers of Architectural Research 2020年第1期9卷 138-147页

作者： Maryam Banaei ali ahmadi Klaus Gramann Javad Hatami School of Architecture and Environmental Design Iran University of Science and TechnologyTehranIran Faculty of Computer Engineering K.N.Toosi UniversityTehranIran Department of Psychology and Ergonomics Biological Psychology and NeuroergonomicsBerlin Institute of TechnologyBerlinGermany Center for Advanced Neurological Engineering University of CaliforniaSan DiegoCAUSA School of Software University of Technology SydneySydneyAustralia Department of Psychology University of TehranTehranIran

Recent studies have shown that architectural interior forms could impact the affective state of inhabitants.However,the direct relation of specific forms with specific affective states is difficult to determine.In addition,no systematic categorization of architectural forms and their relation to emotional states exists.The investigation of the impact of architectural features on inhabitants'emotions is further complicated by the use of two-dimensional images of forms in laboratory investigations,which cannot perceive real-world architecture.Furthermore,the interior form consists of a combination of different forms rather than only pure forms,which was considered in previous studies.This study aimed to rill these gaps by evaluating interior forms on the basis of clustering different images of built living rooms throughout history as well as their impact on emotions.This study used pleasure,arousal,and dominance ratings with an emphasis on individual differences in personality.Virtual sample rooms were created based on formal clusters of architectural forms.Results showed a relationship between forms and emotional states for different personality traits.This work provided a novel approach on the influence of architecture on emotion by considering systematic form categorization and combinations,personality differences,and a virtual reality setup.

关键词： Architectural interior form PAD Self-assessment manikin Personality Virtual reality

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3D Numerical Modeling of Wave Forces on Tandem Fixed Cylinders Using the BEM

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Journal of Marine Science and Application 2013年第3期12卷 279-285页

作者： Mohammad Javad Ketabdari Mohammad Mahdi Abaiee ali ahmadi Faculty of Marine Technology Amirkabir University of TechnologyTehran 15875-4413 Iran Department of Mechanics Sharif University of TechnologyTehran 145888-9694 Iran

在这糊 3D 数字模型被开发学习在波浪之间的复杂相互作用，一套双人脚踏车修理了柱体。液体被认为是 inviscid 并且无旋。因此， Helmholtz 方程被用作一个管理方程。边界元素方法(BEM ) 被采用到 discretize 相关方程。开的边界在学习... 详细信息

在这糊 3D 数字模型被开发学习在波浪之间的复杂相互作用，一套双人脚踏车修理了柱体。液体被认为是 inviscid 并且无旋。因此， Helmholtz 方程被用作一个管理方程。边界元素方法(BEM ) 被采用到 discretize 相关方程。开的边界在学习领域的远领域里被使用。线性波浪被产生并且向双人脚踏车宣传了固定柱体估计力量在他们上适用。特殊注意在在力量上改变在柱体， ka 和 kd 之间的非维的柱体半径和距离上对效果的考虑被给予并且套住模式。在一套九双人脚踏车柱体的中间的柱体波浪力量和套住的模式被验证利用分析数据。比较证实模型的精确性。n 双人脚踏车柱体上的嵌入的波浪力量评价的结果证明在排的批评柱体是为柱体的奇数的中间的。而且，批评套住的模式效果发生为的结果表演近把柱体半径规范化为 0.5 和 1.0。最后，为 n 双人脚踏车柱体的力量评价证实中间的柱体对规范的分离距离的那个力量振幅关于单个柱体的波动。

关键词：边界元法三维数值模拟波浪力串联气瓶三维数值模型亥姆霍兹方程分离距离

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硫化铜矿SAG(半自磨)磨矿废品浮选药剂的交互作用

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Transactions of Nonferrous Metals Society of China 2021年第3期31卷 792-806页

作者： ali ahmadi Mojtaba REZAEI Seyed Mohammad SADEGHIEH Department of Mining Engineering Isfahan University of TechnologyIsfahan 84156-83111Iran

浮选药剂在黏土矿中基础矿物的选矿中表现出复杂的行为。利用中心组合设计法研究浮选药剂对低品位高黏质硫化物矿中铜浮选效率的交互作用。初步结果表明,在石灰作pH调节剂的情况下,异丙基黄原酸钠(SIPX)和O-异丙基-N-乙基硫基氨基甲酸酯... 详细信息

浮选药剂在黏土矿中基础矿物的选矿中表现出复杂的行为。利用中心组合设计法研究浮选药剂对低品位高黏质硫化物矿中铜浮选效率的交互作用。初步结果表明,在石灰作pH调节剂的情况下,异丙基黄原酸钠(SIPX)和O-异丙基-N-乙基硫基氨基甲酸酯(IPETC)是最有效的捕收剂。在不同的pH值下,评估捕收剂(SIPX和IPETC)用量和起泡剂甲基异丁基甲醇(MIBC)用量对分离效率的影响。基于方差分析(ANOVA)结果,对于分离效率而言,捕收剂用量与pH值以及捕收剂用量与起泡剂用量之间的交互作用显著。在低捕收剂用量时,pH值从9提高到11可使IPETC的铜分离效率从81%提高到86%,SIPX的铜分离效率从77%提高到86%。方差分析结果表明,在pH值11、8.6 g/t SIPX、7 g/t IPETC和20 g/t MIBC的条件下,铜分离效率最高(88.7%)。最终,可得出结论,捕收剂SIPX和IPETC更适合于处理高黏质硫化矿。

关键词：浮选硫化铜试剂交互作用废矿

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Influence of Ferric and Ferrous Iron on Chemical and Bacterial Leaching of Copper Flotation Concentrates

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International Journal of Nonferrous Metallurgy 2012年第3期1卷 42-48页

作者： ali ahmadi Department of Mining Engineering Isfahan University of Technology Isfahan Iran

The effects of ferrous and ferric iron as well as redox potential on copper and iron extraction from the copper flotation concentrate of Sarcheshmeh, Kerman, Iran, were evaluated using shake flask leaching examinations. Experiments were carried out in the presence and absence of a mixed culture of moderately thermophile microorganisms at 50?C. Chemical leaching experiments were performed in the absence and presence of 0.15 M iron (ferric added medium, ferrous added medium and a mixture medium regulated at 420 mV, Pt. vs. Ag/AgCl). In addition, bioleaching experiments were carried out in the presence and absence of 0.1 M iron (ferric and ferrous added mediua) at pulp density 10% (w/v), inoculated bacteria 20% (v/v), initial pH 1.6, nutrient medium Norris and yeast extract addition 0.02% (w/w). Abiotic leaching tests showed that the addition of iron at low solution redox potentials significantly increased the rate and extent of copper dissolution but when ferric iron was added, despite a higher initial rate of copper dissolution, leaching process stopped. Addition of both ferrous and ferric iron to the bioleaching medium levelled off the copper extraction and had an inhibitory effect which decreased the final redox potential. The monitoring of ferrous iron, ferric iron and copper extraction in leach solutions gave helpful results to understand the behaviour of iron cations during chemical and bacterial leaching processes.

关键词： Ferric Iron Ferrous Iron Copper Concentrate Leaching Redox Potential

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A Fuzzy Logic Model to Predict the Bioleaching Efficiency of Copper Concentrates in Stirred Tank Reactors

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International Journal of Nonferrous Metallurgy 2015年第1期4卷 1-8页

作者： ali ahmadi Mohammad Raouf Hosseini Department of Mining Engineering Isfahan University of Technology Isfahan Iran

Multiplicity of the chemical, biological, electrochemical and operational variables and nonlinear behavior of metal extraction in bioleaching environments complicate the mathematical modeling of these systems. This research was done to predict copper and iron recovery from a copper flotation concentrate in a stirred tank bioreactor using a fuzzy logic model. Experiments were carried out in the presence of a mixed culture of mesophilic bacteria at 35° C, and a mixed culture of moderately thermophilic bacteria at 50° C. Input variables were method of operation (bioleaching or electrobioleaching), the type of bacteria and time (day), while the recoveries of copper and iron were the outputs. A relationship was developed between stated inputs and the outputs by means of “if-then” rules. The resulting fuzzy model showed a satisfactory prediction of the copper and iron extraction and had a good correlation of experimental data with R-squared more than 0.97. The results of this study suggested that fuzzy logic provided a powerful and reliable tool for predicting the nonlinear and time variant bioleaching processes.

关键词： Fuzzy Logic Modeling Copper Concentrate Bioleaching Stirred Reactor

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The effect of sodium hydrogen carbonate (NaHCO3) on human sperm adenylyl cyclase activity

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Precision Medicine Research 2021年第1期3卷 45-46页

作者： ali ahmadi Department of Biological Sciences and Technologies Islamic Azad University Sari BranchSariIran.

Sperm fertility and motility requires the presence of a functional flagellum to act as a motor to enable sperms to move in fluids.Cyclic adenosine monophosphate(cAMP),as a regulator of many biological pathways,contributes in mammalian sperms to the production of soluble adenyl cyclase,a process which is regulated through Ca2+and HCO3-dependent mechanisms and triggers widespread physiological alterations essential to sperm viability.The aim of this study was to investigate the effect of sodium hydrogen carbonate(NaHCO3)on human sperm adenylyl cyclase activity.Studies show that flagellum is essential for sperms to keep their motility.Furthermore,multiple cellular and molecular players and pathways(i.e.,capacitance)are critical for normal maturation of sperms in final stages[1].Sperm capacity is an incorrect maturation process observed in the female reproductive system or can be tested in specific environments,the end point of which has been shown to allow the sperm to withstand the acrosome reaction and fertilize the egg.Interactions between membrane components(e.g.,ion channels)and intracellular skeletal proteins are strictly regulated and are important for promoting these signaling pathways.

关键词： carbonate effect enable

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External Cake Build Up at Surface of Porous Medim

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Open Journal of Fluid Dynamics 2012年第4期2卷 145-148页

作者： Hooman Fallah ali ahmadi Mohammad Afkhami Karaee Hasan Rabbani Department of Petroleum Engineering Firoozabad Branch Islamic Azad University Firoozabad Iran

Deep bed filtration of carrier water with particles occurs in numerous processes of environmental, chemical, petroleum and civil engineering. For example in the petroleum industry, deep bed filtration of drilling fluid happens during well drilling;it also takes place near to injection wells during seawater injection or produced water re-injection causing in- jectivity reduction. In this work, the filtration theory and its mathematical model are given and the filtration coefficient will be discussed. Then the transition time, the time at which the initial layer of external filter cake is completely formed has been derived mathematically. The transition time can be obtained by calculating the trapping efficiency as a function of the number of previously deposited particles where very few particles can invade the rock and the external filtration begins to build. The prediction of particle capturing and particle retention by mathematical model is an essen- tial stage during planning and design of above-mentioned industrial processes.

关键词： Porous Media Trapping Efficiency External Filtration Transition Time Filtration Coefficient

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Evaluation of the effect of genetic diversity and phylogenetic relationships on different strains of Staphylococcus aureus in clinical specimens

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Microenvironment & Microecology Research 2021年第4期3卷 1-3页

作者： Dariush D.Farhud ali ahmadi Prasa Saberian Sina Kor Farhud Genetic Clinic TehranIran Department of Biological Sciences and Technologies Islamic Azad University Sari BranchSariIran Department of Medical Sciences Hormozgan University of Medical SciencesHormozganIran Department of Medical Sciences Islamic Azad UniversitySari BranchSariIran

Introduction:Staphylococcus aureus is one of the main pathogens in humans.Also,this bacterium can be colonized in the nose.The spa gene is present in all strains of Staphylococcus aureus(S.aureus)and can be used to identify species and toxins such as Panton-Valentine Leukocidin(PVL)that can affect a wide range of skin,soft tissue,and necrotizing pneumonia.Arthritis and life-threatening infections.This study aimed to investigate the effect of genetic diversity and phylogenetic relationships on different strains of Staphylococcus aureus in clinical specimens.Methods:This review study was conducted in 2021 by searching for keywords such as genetic diversity,phylogenetics,and Staphylococcus aureus in reputable databases such as pub med and google scholar.Finally,30 articles were found,of which 30 articles were used out of 26 articles.Results:In general,23%and 18%of health care workers and patients were carriers,respectively.The incidence of methicillin-resistant Staphylococcus aureus(MRSA)is higher in the relevant population.The molecular types of MRSA isolates indicate that the most common virulence gene is Hla,and the most common type of SCCmec is SCCmec type III.Conclusion:Sites with high risk of Staphylococcus aureus should be highly protected,and relevant personnel should be paid attention and health management.

关键词： Staphylococcus aureus Resistance Genetic diversity Phylogenetic relationships

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