检索结果-南通市图书馆

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

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

Modeling frequency distributions of tree height, diameter and crown area by six probability functions for open forests of Quercus persica in Iran

维普期刊数据库评论

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 Forestry Research 2016年第4期27卷 901-906页

作者： Mehrdad Mirzaei Jalal Aziz Ali Mahdavi Asma mohammad rad University of Guilan Sowmeh Sara City GuilanIslamic Republic of Iran Faculty of Natural Resources University of GuilanSowmeh Sara Islamic Republic of Iran Faculty of Agriculture university of Ilam IlamIslamic Republic of Iran Faculty of Natural Resources University of Tehran KarajIslamic Republic of Iran

The prediction of the distribution of quantitative variables in a forest stand is of great interest to forest managers, for the evaluation of forest resources and scheduling of future silvicultural treatments. The aim of this research was to model the distribution of quantitative variables for Quercus persica in open forests in Iran. To investigate the probability distribution of trees in natural stands, 642 trees were selected for measurement using a systematic random sampling method. Selected trees were measured and data were analyzed. Gamma, beta, normal,lognormal, exponential and Weibull probability distributions were fitted to the height distribution of trees. Variables of distribution functions were estimated using the maximum likelihood estimation method. Actual probability and probability which derived from functions was compared using Kolmogorov–Smirnov and Anderson–Darling tests. Beta, Weibull and Weibull probability distributions explained the distributions of tree height, DBH and crown area.

关键词： forests Quercus stands crown canopy Weibull Kolmogorov Darling exponential fitted

Alunite processing method selection using the AHP and TOPSIS approaches under fuzzy environment

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2016年第6期26卷 1017-1023页

作者： Alizadeh Shahab Salari rad mohammad Mehdi Bazzazi Abbas Aghajani Mining Engineering Department Amirkabir University of Technology Tehran *** Iran Mining Engineering Department University of Kashan Kashan *** Iran

Alunite is the most important non bauxite resource for alumina. Various methods have been proposed and patented for processing alunite, but none has been performed at industrial scale and no technical,operational and economic data is available to evaluate methods. In addition, selecting the right approach for alunite beneficiation, requires introducing a wide range of criteria and careful analysis of *** this research, after studying the existing processes, 13 methods were considered and evaluated by 14 technical, economic and environmental analyzing criteria. Due to multiplicity of processing methods and attributes, in this paper, Multi Attribute Decision Making methods were employed to examine the appropriateness of choices. The Delphi Analytical Hierarchy Process(DAHP) was used for weighting selection criteria and Fuzzy TOPSIS approach was used to determine the most profitable candidates. Among 13 studied methods, Spanish, Svoronos and Hazan methods were respectively recognized to be the best choices.

关键词： TOPSIS方法模糊环境明矾石层次分析法加工方法多属性决策方法 Delphi 评估方法

Brain abscess in children,experience of Mashad University

在线全文

学校读者我要写书评

暂无评论

海南医学院学报 2009年第1期15卷 37-39,44页

作者： Faraji rad mohammad Faraji rad Elnaz Department of Neurosurgery Mashad University of Medical Science MashadIran

Objective:Brain abscesses continue to pose a problem in neurosurgery,and it is a serious life-threatening complication for several *** objective of this research was to look at the clinical profile of children suffering from brain abscess,predisposing conditions,microbiology and outcome of these ***:Ninety children aged less than 15 years were *** clinical presentation,predisposing factors,diagnosis,management and outcome were *** were 56(62.2%)males and 34(37.7%)*** mean age of presentation was 5.7±4.2 ***:The mean duration of illness at the time of presentation was 10.6 ±12.4 *** patients presented with fever,vomiting,headache,neurological deficit,and *** predisposing conditions found were cyanotic congenital heart disease in 18(20 %)of children,meningitis in 6(6.7 %),Otitis or mastoiditis in 32(35.5 %),Head trauma in 6(6.7 %),previous intracranial surgery in 8(8.8 %)and no underlying cause was found in 22(24.4 %)*** most common microbe in children with cyanotic congenital heart disease was of the Streptococcus group(54 %).Computerized tomography confirmed the diagnosis and the most common location of the abscess was the parietal lobe of the cerebral *** abscesses were larger than 2 cm in diameter where aspirated *** was performed for eight *** children expired,two due to intracranial bleeding and the others due to severe cerebral edema and tentorial *** were observed in 11 children out of which six had squeal and five had ***:Attention to hygiene of mouth and teeth in infant and child patients with cyanotic heart disease is very important in prevention of infectious brain *** must also pay attention to ear-nose-throat diseases of *** is very important the patients be examined again after treatment because of finding and treatment of unknown otitis and chronic sinusitis.

关键词：脑溢血氰版照相法心脏病临床分析

Mesenchymal stem cells therapy and COVID19:a narrative review

在线全文

学校读者我要写书评

暂无评论

Precision Medicine Research 2021年第3期3卷 18-22页

作者： Mohsen Ebrahimi Ali Ahmadi Fatemeh Mohseni mohammad Taha Saadati rad Department of Medicine Golestan Universityof Medical SciencesGorganIran Department of Biological Sciences andTechnologies Islamic Azad UniversitySari BranchSariIran. Psychiatry and Behavioral Science center Addiction InstituteMazandaran University of Medical ScienceSariIran

At the end of 2019,a new type of coronavirus pneumonia broke out in China and swept the world,and the World Health Organization named it *** stem cells(MSCs)are cells with high differentiation potential and their ability to *** therapeutic effects of mesenchymal stem cells are mediated by the secretion of various agents,including conventional secretory proteins such as cytokines and growth factors,as well as *** injection in patients with COVID-19 was found to have potent anti-inflammatory activity of mesenchymal stem *** processes were evident from numerous beneficial outcomes,including an increase in peripheral lymphocyte counts,a decrease in C-reactive protein,and a decrease in active cytokine-secreting immune cells in the circulating blood for 3 to 6 *** is suggested that due to the favorable results of studies in this field,more studies be done on this treatment method.

关键词： COVID19 Mesenchymal stem cells(MSCs) Pneumonia

A handy review of carpal tunnel syndrome:From anatomy to diagnosis and treatment

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of radiology 2014年第6期6卷 284-300页

作者： mohammad Ghasemi-rad Emad Nosair Andrea Vegh Afshin mohammadi Adam Akkad Emal Lesha mohammad Hossein mohammadi Doaa Sayed Ali Davarian Tooraj Maleki-Miyoab Anwarul Hasan Center for Biomedical Engineering Department of Medicine Brigham and Women’s Hospital Harvard Medical School Cam-bridge MA 02139 United States Harvard-MIT Division of Health Sciences and Technology Massachusetts Institute of Technology Cambridge MA 02139 United States Anatomical Sciences Basic Medical Sciences DepartmentCollege of MedicineSharjah UniversitySharjah27272The United Arab Emirates Department of Materials Science and Engineer-ing University of Toronto Toronto Ontario M5S1A4 Canada Department of radiology Imam Khomainee Hospital Urmia University of Medical Sciences Urmia *** Iran College of Science and Mathematics University of Massachusetts Boston Boston MA 02138 United States Department of Chemical En-gineering Sharif University of Technology Tehran *** Iran Department of Clinical Dentistry College of Den-tistry Ajman University of Science and Technology Ajman 2441 The United Arab Emirates Department of Biochemistry and Molecular Bio-physics Washington University School of Medicine St. Louis MO 63110 United States Biomedical Engineering and Department of Mechanical Engineering American University of Beirut Beirut 1107 2020 Lebanon

Carpal tunnel syndrome(CTS) is the most commonly diagnosed disabling condition of the upper extremities. It is the most commonly known and prevalent type of peripheral entrapment neuropathy that accounts for about 90% of all entrapment neuropathies. This review aims to provide an outline of CTS by considering anat-omy, pathophysiology, clinical manifestation, diagnostic modalities and management of this common condition, with an emphasis on the diagnostic imaging evaluation.

关键词：腕骨隧道症候群解剖 Ultrasonography 磁性的回声成像计算断层摄影术 Ultrasonography 诊断神经传导学习处理

In Silico Screening of Natural Products as Potential Inhibitors of SARS-CoV-2 Using Molecular Docking Simulation

维普期刊数据库评论

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 Integrative Medicine 2022年第3期28卷 249-256页

作者： Rajib Hossain Chandan Sarkar Shardar mohammad Hafiz Hassan Rasel Ahmed Khan mohammad Arman Pranta Ray Muhammad Torequl Islam Sevgi Durna Dastan Javad Sharifi-rad Zainab M. Almarhoon Miquel Martorell William N. Setzer Daniela Calina Department of Pharmacy Life Science FacultyBangabandhu Sheikh Mujibur Rahman Science and Technology UniversityGopalganj(8100)Bangladesh Harmacy Discipline Life Science SchoolKhulna UniversityKhulna-9280Bangladesh Departme nt of Pharmacy In ternational Islamic UniversityChittagongBangladesh Department of Biomedical Engin eeri ng Huazho ng Un iversity of Science and Tech no logyWuhan(430074)China Department of Biology Faculty of ScienceSivas Cumhuriyet UniversitySivas(58140)Turkey Beekeeping Development Application and Research Center Sivas Cumhuriyet UniversitySivas(58140)Turkey School of Medicine University of AzuayCuencaEcuador Department of Chemistry College of ScienceKing Saud UniversityRiyadh(11451)Saudi Arabia Department of Nutrition and Dietetics Faculty of Pharmacyand Centre for Healthy LivingUniversity of ConcepcionConcepcion(4070386)Chile Department of Chemistry University of Alabama in HuntsvilleHuntsvilleAL(35899)USA Aromatic Plant Research Center 230 N 1200 ESuite 100LehiUT(84043)USA Department of Clinical Pharmacy University of Medicine and Pharmacy of CraiovaCraiova(200349)Romania

Objective:To explore potential natural products against severe acute respiratory syndrome coronavirus(SARS-CoV-2)via the study of structural and non-structural proteins of human ***:In this study,we performed an in-silico survey of 25 potential natural compounds acting against *** docking studies were carried out using compounds against 3-chymotrypsin-like protease(3 CL^(PHO)),papain-like protease(PL^(PRO)),RNA-dependent RNA polymerase(RdRp),non-structural protein(nsp),human angiotensin converting enzyme 2 receptor(hACE2 R),sapike glycoprotein(S protein),abelson murine leukemia viral oncogene homolog 1(ABL1),calcineurin-nuclear factor of activated T-cells(NFAT)and transmembrane protease serine ***:Among the screened compounds,amentoflavone showed the best binding affinity with the 3 CL^(PRO),RdRp,nsp13,nsp15,hACE2 R,ABL1 and calcineurin-NFAT;berbamine with hACE2 R and ABL1;cepharanthine with nsp10,nsp14,nsp16,S protein and ABL1;glucogallin with nsp15;and papyriflavonol A with PL^(PRO)*** good interacting compounds were juglanin,betulinic acid,betulonic acid,broussooflavan A,tomentin A,B and E,7-methoxycryptopleurine,aloe emodin,quercetin,tanshinone I,tylophorine and furruginol,which also showed excellent binding affinity towards a number of target *** of these compounds showed better binding affinities towards the target proteins than the standard drugs used in this ***:Natural products or their derivatives may be one of the potential targets to fight against SARS-CoV-2.

关键词： SARS-CoV-2 natural products-derived anti-SARS-CoV-2 candidates structural proteins nonstructural proteins molecular docking

A reappraisal of active faults in central-east Iran(Kerman province)

在线全文

学校读者我要写书评

暂无评论

Earthquake Science 2022年第2期35卷 122-137页

作者： mohammad Talebi Abbas Sivandi-Pour Ghasem-Ali Ahmadi Ehsan Noroozinejad Farsangi Shamseddin Esmaeili mohammad-Javad Banimahdi-Dehkordi Hamidreza Safizadeh Mahdieh Akbarpoor Ehsan Ebrahimi Rabe Sharifi rad Manoochehr Fallah International Institute of Earthquake Engineering and Seismology(IIEES) Tehran ***Iran Faculty of Civil and Surveying Engineering Graduate University of Advanced TechnologyKerman ***Iran Geological and Geotechnical Department Padidab Sepahan Consulting EngineersEsfahan ***Iran Razi University Kermanshah ***Iran Institute for Advanced Studies in Basic Sciences(IASBS) Zanjan ***Iran Kerman Provincial Gas Corporation National Iranian Gas CompanyKerman ***Iran

Fault lineaments are the main input data in earthquake engineering and seismology *** study presents a digitally-based active fault map of the Kerman region in central-east Iran which experienced several devastating earthquakes on poorly exposed and/or not identified active *** Landsat 8 data,we have carried out the image-based procedures of fault mapping,which include applying the contrast stretching technique,the principal component analysis,the color composite technique,the spectral rationing,and creating the false-color composite ***,we have cross-checked the resulting map with the geological maps provided by the Geological Survey of Iran to decrease the associated *** resulting map includes 123 fault segments,still,a part of which has been expressed in the previously compiled active-fault maps of ***,the new one is mapping the poorly exposed active faults,so-called secondary faults,which are able to produce strong *** faults are primarily associated with poorly defined areas that accommodate low levels of seismicity;however,sporadic strong events are likely to *** has also been investigated that these kinds of faults are seismogenic and are able to produce destructive *** total,the outcome of this study can also be jointed with seismic studies for investigating parts of the earthquake activity in central-east Iran,in particular for the fault-based approaches in impending earthquake-resistant buildings.

关键词： central-east Iran Kerman active fault satellite image processing remote sensing

A low-voltage and energy-efficient full adder cell based on carbon nanotube technology

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2010年第2期2卷 114-120页

作者： Keivan Navi Rabe'e Sharifi rad mohammad Hossein Moaiyeri Amir Momeni Faculty of Electrical and Computer Engineering Shahid Beheshti UniversityGC

Scaling problems and limitations of conventional silicon transistors have led the designers to exploit novel nano-technologies. One of the most promising and feasible nano-technologies is CNT(Carbon Nanotube) based transistors. In this paper, a high-speed and energy-efficient CNFET(Carbon Nanotube Field Effect Transistor) based Full Adder cell is proposed for nanotechnology. This design is simulated in various supply voltages, frequencies and load capacitors using HSPICE circuit simulator. Significant improvement is achieved in terms of speed and PDP(Power-Delay-Product) in comparison with other classical and state-of-the-art CMOS and CNFET-based designs, existing in the literature. The proposed Full Adder can also drive large load capacitance and works properly in low supply voltages.

关键词： CNFET Low-Voltage Full-Adder Minority-Function Nanotechnology