检索结果-南通市图书馆

Hepatoprotective and cytoprotective properties of Hyptis suaveolens against oxidative stress-induced damage by CCl_4 and H_2O_2

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2012年第11期5卷 868-874页

作者： Hadi Ghaffari behrouz Jalali Ghassam HS Prakash Department of Studies in Biotechnology University of MysoreManasagangotriMysore570006KarnatakaIndia

Objective:To investigate capacity of Hyptis suaveolens(***) methanol extract as an antioxidant to protect against carbon tetrachloride(CCl_4)-indueed oxidative stress,hepatotoxicitv in Albino Wistar rats and cytoprotective effect of hydrogen peroxide(H_2O_2) induced cell death in HepG_2 cell ***:Two different doses of methanol extract of *** were evaluated for the hepatoprotective activity against carbon tetrachloride(CCl_4) induced hepatotoxicitv in *** in GroupⅠ:served as control,groupⅡ:***(100 mL/ kg b.w),groupⅢ:***(50 mL/kg b.w) + CCl_4(1 mg/kg),groupⅣ:***(100 mL/kg b.w) + CCl_4(1 ml/kg)and groupⅤ:CCl_4(1 mL/kg).Histopathologic changes of liver were also *** was also determined by 3,(4,5-dimethylthiazol-2-yl)2,5-diphenyl-tetrazolium bromide(MTT) ***:Oral sigle dose treatment of CCl_4 produced a marked elevation in the serum levels of aspartate transaminase(AST),alanine transaminase(ALT), alkaline phosphatase(ALP) and Lactate dehydrogenase(LDH).Histopathological analysis of the liver of CCl_4-induced rats revealed marked liver cell necrosis with inflammatory collections that were conformed to increase in the levels of SOD,GSH,GST,GR and *** with H_2O_2 significantly induced death of HepG_2 *** with *** methanol extract inhibited or attenuated H_2O_2 induced ***:This study shows that *** methanol extract can be proposed to protect the liver against CCl_4-induced oxidative damage in rats and protect the cells against H_2O_2-induced oxidative damage in HepG_2 *** hepatoprotective and cytoprotective effects might be correlated with its antioxidant and free radical scavenger effects.

关键词： Hyptis suaveolens Antioxidant enzymes Lipid peroxidation HepG_2 cell line Hydrogen peroxide MTT assay

A New Stochastic Model for Classifying Flexible Measures in Data Envelopment Analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2021年第3期9卷 569-592页

作者： Mansour Sharifi Ghasem Tohidi behrouz Daneshian Farzin Modarres Khiyabani Department of Mathematics Tabriz BranchIslamic Azad UniversityTabrizIran Department of Mathematics Central Tehran BranchIslamic Azad UniversityTehranIran

The way to deal with flexible data from their stochastic presence point of view as output or input in the evaluation of efficiency of the decision-making units(DMUs)motivates new perspectives in modeling and solving data envelopment analysis(DEA)in the presence of flexible *** the orientation of flexible data is not pre-determined,and because the number of DMUs is fixed and all the DMUs are independent,flexible data can be treated as random variable in terms of both input and output *** a result,the selection of flexible variable as input or output for n DMUs can be regarded as binary random *** the randomness of choosing flexible data as input or output,we deal with DEA models in the presence of flexible data whose input or output orientation determines a binomial distribution *** study provides a new insight to classify flexible variable and investigates the input or output status of a variable using a stochastic *** proposed model obviates the problems caused by the use of the large M number and using its different values in previous *** addition,it can obtain the most appropriate efficiency value for decision-making units by assigning the chance of choosing the orientation of flexible variable to the model *** proposed method is compared with other available methods by employing numerical and empirical examples.

关键词： Data envelopment analysis Flexible variables Stochastic model Random variable Classifying

An accurate analytical I-V model for sub-90-nm MOSFETs and its application to read static noise margin modeling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第1期13卷 58-70页

作者： behrouz AFZAL Behzad EBRAHIMI Ali AFZALI-KUSHA Massoud PEDRAM School of Electrical and Computer Engineering University of Tehran Department of Electrical Engineering University of Southern California

We propose an accurate model to describe the I-V characteristics of a sub-90-nm metal-oxide-semiconductor field-effect transistor(MOSFET) in the linear and saturation regions for fast analytical calculation of the *** model is based on the BSIM3v3 *** of using constant threshold voltage and early voltage,as is assumed in the BSIM3v3 model,we define these voltages as functions of the gate-source *** accuracy of the model is verified by comparison with HSPICE for the 90-,65-,45-,and 32-nm CMOS *** model shows better accuracy than the nth-power and BSIM3v3 ***,we use the proposed I-V model to calculate the read static noise margin(SNM) of nano-scale conventional 6T static random-access memory(SRAM) cells with high *** calculate the read SNM by approximating the inverter transfer voltage characteristic of the cell in the regions where vertices of the maximum square of the butterfly curves are *** results for the SNM are also in excellent agreement with those of the HSPICE simulation for 90-,65-,45-,and 32-nm *** in the presence of process variations and negative bias temperature instability(NBTI) shows that the model can accurately predict the minimum supply voltage required for a target yield.

关键词： Modeling Nano-scale Process variation Read static noise margin(SNM) SRAM

Changes in hydrologic components from a mid-sized plots induced by rill erosion due to cyanobacterization

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Soil and Water Conservation Research 2022年第1期10卷 143-148页

作者： Atefeh Jafarpoor Seyed Hamidreza Sadeghi behrouz Zarei Darki Mehdi Homaee Department of Watershed Management Engineering Faculty of Natural ResourcesTarbiat Modares UniversityNoorIran Department of Watershed Management Engineering Faculty of Natural ResourcesTarbiat Modares University.Noor46417-76489Iran Department of Marine Biology Faculty of Marine ScienceTarbiat Modares UniversityNoorIran Agrohydrology Research Group College of AgricultureTarbiat Modares UniversityTehran 14115-336Iran Department of mining Engineering Faculty of EngineeringTarbiat Modares UniversityTehran 14115Iran

Runoff components are the most important factors in explaining the hydrological behaviour of a *** that the proper understanding of the runoff processes may effectively help managers and decision-makers adopt appropriate *** this regard,there are variety of approaches to handle runoff generation,but the application of environmentally friendly,biologic-based and cost-effective approaches such as soil microorganisms has been seldom *** study has therefore tried to investigate the role of inoculation of cyanobacteria on runoff components under rain simulation conditions at the mid-sized(i.e.,6×1m)plots installed at=30% slope *** treated plots were subjected to a simulated rainfall with an intensity of 50 mm h^(-1) and an initial duration of 30 min with three replica-tions.A simulated runoff of 2.18±0.32 Lmin^(-1) was also performed simultaneously on the onset of starting surface *** results showed significant differences(P<0.021)in hydrological behaviours in control and treated *** that no surface runoff was produced in treated plots up to the end of the initial duration of 30 min of simulated *** results revealed that cyanobacterization by secretion of exopolysaccharides not only postponed runoff generation but also effectively inhibited runoff com-ponents even if the rainfall incident extended for longer *** positive effect of cyanobacterization on increasing infiltration and potential storage of water beneath the soil was also verified in the present study,which suggests the profitable application of cyanobacteria for regulating hydrologic components.

关键词： Soil bio-crust Soil infiltration Water balance Water management

Improved Prediction of Slope Stability under Static and Dynamic Conditions Using Tree-BasedModels

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2023年第10期137卷 455-487页

作者： Feezan Ahmad Xiaowei Tang Jilei Hu Mahmood Ahmad behrouz Gordan State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian116024China Key Laboratory of Geological Hazards on Three Gorges Reservoir Area Ministry of EducationChina Three Gorges UniversityYichang443002China Department of Civil Engineering Faculty of EngineeringInternational Islamic University MalaysiaJalan GombakSelangor50728Malaysia Department of Civil Engineering University of Engineering and Technology Peshawar(Bannu Campus)Bannu28100Pakistan Faculty of Civil Engineering Islamic Azad UniversityVaramin Pishva BranchTehran15914Iran

Slope stability prediction plays a significant role in landslide disaster prevention and *** paper’s reduced error pruning(REP)tree and random tree(RT)models are developed for slope stability evaluation and meeting the high precision and rapidity requirements in slope *** data set of this study includes five parameters,namely slope height,slope angle,cohesion,internal friction angle,and peak ground *** available data is split into two categories:training(75%)and test(25%)*** output of the RT and REP tree models is evaluated using performance measures including accuracy(Acc),Matthews correlation coefficient(Mcc),precision(Prec),recall(Rec),and *** applications of the aforementionedmethods for predicting slope stability are compared to one another and recently established soft computing models in the *** analysis of the Acc together with Mcc,and F-score for the slope stability in the test set demonstrates that the RT achieved a better prediction performance with(Acc=97.1429%,Mcc=0.935,F-score for stable class=0.979 and for unstable case F-score=0.935)succeeded by the REP tree model with(Acc=95.4286%,Mcc=0.896,F-score stable class=0.967 and for unstable class F-score=0.923)for the slope stability dataset The analysis of performance measures for the slope stability dataset reveals that the RT model attains comparatively better and reliable results and thus should be encouraged in further research.

关键词： Slope stability seismic excitation static condition random tree reduced error pruning tree

KF-Melamine Formaldehyde Resin （KF-MFR） as a Versatile and Efficient Heterogeneous Reagent for Aldol Condensation of Aldehydes and Ketones under Microwave Irradiation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2011年第6期29卷 1221-1226页

作者： Rezaie, Ramin Heidary, Mohammad Soltani Rad, Mohammad Navid behrouz, Somayeh Department of Chemistry Islamic Azad University Firouzabad Branch Iran Department of Chemistry Faculty of Basic Sciences Shiraz University of Technology Shiraz 71555-313 Iran

KF-Melamine formaldehyde resin （KF-MFR） was demonstrated to be a highly efficient heterogenious catalyst for cross-aldol condensation under microwave irradiation. In this synthesis, various aldehydes and ketones were condensed together in the presence of supported KF on melamine-formaldehyde resin to afford different chalcone derivatives in good to excellent yields. KF-MFR proved to have unique termal and chemical resistance and can be reused for many consecutive runs without remarkable loss in catalytic activity.

关键词： KF-MFR ketones aromatic aldehydes aldol reaction microwave chemistry

Accurate threat hunting in industrial internet of things edge devices

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Digital Communications and Networks 2023年第5期9卷 1123-1130页

作者： Abbas Yazdinejad behrouz Zolfaghari Ali Dehghantanha Hadis Karimipour Gautam Srivastava Reza M.Parizi Cyber Science Lab School of Computer ScienceUniversity of GuelphOntarioCanada Department of Electrical and Software Engineering University of CalgaryAlbertaCanada Department of Mathematics and Computer Science Brandon UniversityBrandonCanada College of Computing and Software Engineering Kennesaw State UniversityGAUSA Research Center for Interneural Computing China Medical UniversityTaichungTaiwanChina Department of Computer Science and Mathematics Lebanese American UniversityBeirut1102Lebanon

Industrial Internet of Things(IIoT)systems depend on a growing number of edge devices such as sensors,controllers,and robots for data collection,transmission,storage,and *** kind of malicious or abnormal function by each of these devices can jeopardize the security of the entire ***,they can allow malicious software installed on end nodes to penetrate the *** paper presents a parallel ensemble model for threat hunting based on anomalies in the behavior of IIoT edge *** proposed model is flexible enough to use several state-of-the-art classifiers as the basic learner and efficiently classifies multi-class anomalies using the Multi-class AdaBoost and majority *** evaluations using a dataset consisting of multi-source normal records and multi-class anomalies demonstrate that our model outperforms existing approaches in terms of accuracy,F1 score,recall,and precision.

关键词： IIoT Threat hunting Edge devices Multi-class anomalies Ensemble methods

Molecular identification of Nosema species in provinces of Fars,Chaharmahal and Bakhtiari and Isfahan(Southwestern Iran)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2017年第1期7卷 10-13页

作者： Fatemeh Aroee Hamidreza Azizi behrouz Shiran Khodadad Pirali Kheirabadi Department of Pathobiology Faculty of Veterinary MedicineShahrekord UniversityShahrekordIran Department of Plant Breeding and Biotechnology Faculty of AgricultureShahrekord UniversityShahrekordIran

Objective: To molecularly identify Nosema species in provinces of Isfahan, Fars,Chaharmahal and ***: One hundred and eighty adult honey bees suspected with nosemosis from provinces of Fars(different counties), Isfahan, and Chaharmahal and Bakhtiari were tested. In order to determine the species of Nosema, previously developed PCR and primers based on 16 S r RNA gene were used. PCR products were puri fi ed and sent to the Korean company of Macrogen for ***: Only Nosema ceranae was determined in all samples based on their molecular profile. Sequences of the 16 S r RNA gene were sent to Gen Bank/NCBI(samples accession numbers KP318660–KP318663).Conclusions: This species currently exists in European honeybee apiaries of Apis mellifera in the studied provinces.

关键词： Microsporidia Nosema apis Nosema ceranae PCR

Simulation and experimental study of dynamic recrystallization process during friction stir vibration welding of magnesium alloys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2021年第9期31卷 2626-2650页

作者： Mahmoud ABBASI behrouz BAGHERI Farzaneh SHARIFI Faculty of Engineering University of KashanKashanIran Department of Mining and Metallurgy Amirkabir University of TechnologyTehranIran School of Mechanical and Materials Engineering Washington State UniversityPullmanUSA

A two-dimensional cellular automaton(CA)model was utilized to analyze the effect of mechanical vibration on microstructure evolution of AZ91 alloy during friction stir welding(FSW).The simulated results,namely grain topology,grain size distribution,average grain size,and also the dynamic recrystallization(DRX)fraction were compared with measured *** adequate comparability between FEM and experimental data shows that the CA method can be applied to the analysis of the microstructure progression during the friction stir welding of AZ91 *** is concluded that the dislocation density during the friction stir vibration welding(FSVW)is higher than that in the FSW process and the process of nucleation and grain growth is faster for samples during FSVW compared to *** grain size modification and DRX phenomenon with various vibration frequencies were also simulated in detail during *** is found that vibration makes nucleation start earlier and decreases the proportion of the incubation period and the percentage of recrystallization as vibration frequency improves.

关键词： friction stir welding vibration simulation grain size dynamic recrystallization cellular automaton model