检索结果-南通市图书馆

Chinese Chemical Letters 2010年第6期21卷 656-660页

作者： Mohammad Bakherad amir hossein Amin Ali Keivanloo Bahram Bahramian Mersad Raessi School of Chemistry Shahrood University of TechnologyShahroodIran

The palladium-salen complex palladium(Ⅱ) N,N'-bis{[5-(triphenylphosphonium)-methyl]salicylidene}-1,2-ethanediamine chloride was found to be a highly active catalyst for the copper- and solvent-free coupling reaction of terminal alkynes with different acyl chlorides in the presence of triethylamine as base,giving excellent ynones under aerobic conditions.

关键词： Copper-free Ynones Pd-salen complex Neat

Shear behavior and dilatancy of an artificial hard-matrix bimrock: An experimental study focusing on the role of blocky structure

在线全文

学校读者我要写书评

暂无评论

Rock Mechanics Bulletin

Rock Mechanics Bulletin 2024年第4期3卷 83-101页

作者： amir Yazdani Saeed Karimi-Nasab hossein Jalalifar Department of Mining Engineering Isfahan University of TechnologyIsfahanIran Department of Mining Engineering Shahid Bahonar University of KermanKermanIran Department of Petroleum Engineering Shahid Bahonar University of KermanKermanIran

Bimrocks are characterized by their geotechnically significant blocky structure,presenting complex shear *** study investigates the shear behavior and dilatancy of bimrocks featuring a rock-like matrix,such as *** study addresses a gap in current research,which has predominantly examined the shear behavior of soil-matrix bimrocks(bimsoils).Laboratory direct shear tests were performed on idealized models with varying volumetric block proportions(VBPs).The results highlight that blocks exert both positive and negative effects on shear strength,dilation,and block breakage factor(BF),depending on *** indicate 40%and 60%as critical VBPs,revealing distinct shear strength trends within this range,contrary to the dominant downward *** positively impact dilation and BF between 20%and 50%VBP,while negatively affecting them beyond this *** skeleton inherently promotes stable dilatancy under normal stress increments and intensifies stress dependency of shear *** in dilation angle concerning normal stress and VBP suggest the potential for characterizing this factor using equivalent strength and roughness,akin to rockfill *** assessments of equivalent strength revealed positive effects of blocks when VBP was between 30%and 70%.Lastly,the findings indicate that blocks notably impact pre-and post-peak behaviors by reducing shear stiffness and inducing local hardening *** study also discusses the similarities and distinctions in the function of blocks within soil-like and rock-like *** offers new insights into the exact role of blocks in bimrock shear behavior beyond the traditional interpretation through the variation of friction and cohesion.

关键词： Bimrock Rock-like matrix Shear behavior Shear strength Shear dilation Block breakage

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Medicine 2023年第4期21卷 354-360页

作者： amir Mohammad Jaladat Mahdi Alizadeh Vaghasloo Fatemeh Atarzadeh Mohammad hossein Ayati amir Hooman Kazemi Emine Akin Mohammad Hashem Hashempur Department of Persian Medicine School of MedicineShiraz University of Medical SciencesShiraz ***Iran Department of Traditional Medicine School of Persian MedicineTehran University of Medical SciencesTehran ***Iran Department of History of Medicine School of Traditional MedicineTehran University of Medical SciencesTehran ***Iran International School Beijing University of Chinese MedicineBeijing 100029China Alkali Life Center Healthy Life&Consultancy and EducationAtas ehir-Istanbul 34750Turkey Research Center for Traditional Medicine and History of Medicine Department of Persian MedicineSchool of MedicineShiraz University of Medical SciencesShiraz ***Iran

Kaiy(medieval cautery)is an ancient method of heat therapy in traditional Persian medicine(TPM).Some of its important applications have been neglected during the medical ***,different treatment modalities that incorporate heat,including moxibustion,have progressed in traditional Chinese *** this study,we reviewed the main TPM textbooks that were written specifically in the field of *** considered the traditional teachings in the context of contemporary information,gathered from the scientific literature about moxibustion and modern *** surgical therapeutic indications of kaiy(e.g.,debridement and coagulative procedures)have been advanced by the innovation of ***,those therapeutic applications that were based on the TPM humoral theory for relieving body coldness or myofascial pains—which are similar to moxibustion usages—have not received the same *** from the broad similarities of kaiy and moxibustion as thermal therapies with similar indications,there is a striking correspondence between kaiy point mapping and ***,further research on different kaiy aspects is recommended.

关键词： Traditional Persian medicine Moxibustion Chinese medicine Kaiy Medieval cautery Fire acupuncture

A soft computing approach for prediction of P-r-T behavior of natural gas using adaptive neuro-fuzzy inference system

在线全文

学校读者我要写书评

暂无评论

Petroleum 2017年第4期3卷 447-453页

作者： amir hossein Saeedi Dehaghani Mohammad Hasan Badizad Petroleum Engineering Group Department of Chemical EngineeringTarbiat Modares UniversityTehranIran Department of Chemical and Petroleum Engineering Sharif University of TechnologyTehranIran

Density is an important property of natural gas required for the design of gas processing and reservoir *** to expensive measurement of density,industry tends to predict gas density through an ***,all EOS are associated with uncertainties,especially at highpressure ***,using sophisticated EOS in commercial software renders simulation highly *** work aims to evaluate performance of adaptive neuro-fuzzy inference system(ANFIS)as a widely-accepted intelligent model for prediction of P-r-T behavior of natural *** experimental data reported in the literature,our inference system was trained with 95 data of natural gas densities in the temperature range of(250-450)K and pressures up to 150 ***,prediction by ANFIS was compared with those of AGA8 and GERG04 which both are leading industrial EOS for calculation of natural gas *** was observed that ANFIS predicts natural gas density with AARD%of 1.704;and is able to estimate gas density as accurate as sophisticated *** proposed model is applicable for predicting gas density in the range of(250-450)K,(10-150)MPa and also for sweet gases,i.e.,containing a low concentration of N2 and CO2.

关键词： Natural gas Density Fuzzy inference system Intelligent modelling Equation of state

Experimental study of Iranian heavy crude oil viscosity reduction by diluting with heptane, methanol, toluene, gas condensate and naphtha

在线全文

学校读者我要写书评

暂无评论

Petroleum 2016年第4期2卷 415-424页

作者： amir hossein Saeedi Dehaghani Mohammad Hasan Badizad Petroleum Engineering Group Faculty of Chemical EngineeringTarbiat Modares UniversityTehranIran

Due to the high viscosity of heavy crude oils,production from these reservoirs is a demanding *** tackle this problem,reducing oil viscosity is a promising *** are various methods to reduce viscosity of heavy oil:heating,diluting,emulsification,and core annular *** this study,dilution approach was employed,using industrial solvents and gas *** viscosity of two Iranian heavy crude oils was measured by mixing with solvents at different *** of both oil samples with toluene and heptane,resulted in viscosity ***,their effect became less significant at higher concentrations of *** of forming hydrogen bonds,adding methanol to heavy crude oil resulted in higher *** adding condensate,viscosity of each sample *** condensate had a greater impact on heavier oil;however,at higher temperatures its effect was *** with naphtha decreased heavy oil viscosity in the same way as n-heptane and *** experimental investigation,different viscosity models were evaluated for prediction of heavy oil/solvent *** was recognized that Lederer'model is the best one.

关键词： Heavy oil Viscosity reduction Dilution Toluene Methanol n-Heptane Naphtha Gas condensate

Preparation, characterization and in vivo evaluation of alginate-coated chitosan and trimethylchitosan nanoparticles loaded with PR8 influenza virus for nasal immunization

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Pharmaceutical Sciences 2019年第2期14卷 216-221页

作者： Jafar Mosafer amir-hossein Sabbaghi Ali Badiee Solmaz Dehghan Mohsen Tafaghodi Research Center of Advanced Technologies in Medicine Torbat Heydariyeh University of Medical Sciences School of Pharmacy Mashhad University of Medical Sciences Student Research Committee Mashhad University of Medical Sciences Nanotechnology Research Center Pharmaceutical Technology Institute Mashhad University of Medical Sciences

For efficient mucosal vaccine delivery, nanoparticulate antigens are better taken by microfold cells in the nasal associated lymphoid tissue and also dendritic cells. Nanoparticles based on polymers such as chitosan(CHT) and its water soluble derivative, trimethylchitosan(TMC), could be successfully used as carrier/adjuvant for this purpose. Sodium alginate, a negatively charged biopolymer, could modify the immunostimulatory properties of CHT and TMC NPs and increase their stability. Sodium alginate(ALG)-coated chitosan(CHT)and trimethylchitosan(TMC) nanoparticles(NPs) loaded with inactivated PR8 influenza virus were successfully prepared by direct coating of the virus with CHT or TMC polymers to evaluate their immunoadjuvant potential after nasal immunization. After nasal immunizations in BALB/c mice, PR8-CHT formulation elicited higher IgG2 a and Ig G1 antibody titers compared with PR8-TMC. ALG coating of this formulation(PR8-CHT-ALG) significantly decreased the antibody titers and a less immune response was induced than PR8-TMC-ALG formulation. PR8-TMC-ALG formulation showed significantly higher Ig G2 a/Ig G1 ratio, as criteria for Th1-type immune response, compared with PR8-CHT-ALG and PR8 virus alone. Altogether, the PR8-TMC-ALG formulation could be considered as an efficient intranasal antigen delivery system for nasal vaccines.

关键词： Chitosan Trimethyl chitosan Alginate PR8 influenza virus Nasal immunization

Transmembrane serine protease 2 and angiotensin-converting enzyme 2 anti-inflammatory receptors for COVID-19/inflammatory bowel diseases treatment

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2021年第46期27卷 7943-7955页

作者： Naser-Aldin Lashgari Nazanin Momeni Roudsari Saeideh Momtaz amir hossein Abdolghaffari Department of Toxicology and Pharmacology Faculty of PharmacyTehran Medical SciencesIslamic Azad UniversityTehran ***Iran Medicinal Plants Research Center Institute of Medicinal PlantsACECRKaraj 141554364Iran Toxicology and Diseases Group(TDG) Pharmaceutical Sciences Research Center(PSRC)The Institute of Pharmaceutical Sciences(TIPS)Tehran University of Medical SciencesTehran ***Iran Department of Toxicology and Pharmacology Faculty of PharmacyTehran University of Medical SciencesTehran ***Iran Gastrointestinal Pharmacology Interest Group(GPIG) Universal Scientific Education and Research Network(USERN)Tehran ***Iran

long-term,and relapsing inflammatory *** may spontaneously grow in the colon,and in severe cases may result in tumor lesions such as invasive carcinoma in inflamed regions of the *** epidemiological reports indicate that old age and underlying diseases such as IBD contribute to severity and mortality in patients with coronavirus disease 2019(COVID-19).Currently,the ongoing COVID-19 pandemic caused serious morbidity and mortality *** has also been shown that the transmembrane serine protease 2 is an essential factor for viral activation and viral ***,viral entry causes a'cytokine storm'that induces excessive generation of proinflammatory cytokines/chemokines including interleukin(IL)-6,IL-2,IL-7,tumor necrosis factor-α,and interferon-γ.Future research could concentrate on developing inflammatory immunological responses that are efficient to encounter *** analysis elucidates the role of inflammation and immune responses during IBD infection with COVID-19 and provides a list of possible targets for IBD-regulated therapies in *** from clinical,in vitro,and in vivo studies were collected in English from PubMed,Google Scholar,Scopus,and the Cochrane library until May 2021.

关键词： Inflammatory bowel diseases COVID-19 Transmembrane serine protease 2 Inflammation Pro-inflammatory Immunological responses

An ionic 2D inorganic-organic hybrid of tris[((1H-tetrazol-5-yl)methyl)morpholine] dodecatungstophosphate(Ⅴ) pentahydrate:Synthesis X-ray crystal structure and spectroscopic characterizations

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 Chemical Letters 2010年第4期21卷 501-505页

作者： Mohsen Nikpour hossein Eshtiagh-hosseini Masoud Mirzaei amir Aghaei Kaju Soroush Zarinabadi Department of Chemistry School of SciencesIslamic Azad UniversityAhvaz BranchAhvaz 61349-68875Iran Department of Chemistry School of SciencesFerdowsi University of MashhadMashhadP.O.Box 917791436Iran Department of Chemistry Khorassan Science & Technology ParkMashhadP.O.Box 91735139Iran

A unique ionic hybrid material[C_6H_(12)N_5O]_3[(PO_4)W__(12)O_(36)]·5H_2O has been synthesized from the reaction of((1H-tetrazole-5- yl)methyl)morpholine andα-H_3[(PO_4)W_(12)O_(36)]·21H_*** has successfully been characterized by elemental analysis,IR and ~1H NMR spectroscopies,TGA and single-crystal X-ray diffraction *** title compound is constructed from the three [C_6H_(12)N_5O]^+ cations andα-Keggin[(PO_4)W_(12)O_(36)]^(3-) *** most remarkable structural feature of this hybrid can...

关键词： Polyoxometalate Inorganic-organic hybrid Morpholine Dodecatungstophosphate Crystal structure

Magnetic force microscopy of an operational spin nano-oscillator

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2022年第3期8卷 247-252页

作者： Seyed amir hossein Banuazizi Afshin Houshang Ahmad A Awad Javad Mohammadi Johan Akerman Liubov M.Belova Faculty of New Sciences and Technologies University of TehranTehranIran Materials and Nanophysics Department of Applied PhysicsSchool ofEngineering SciencesKTH Royal Institute of Technology11419 StockholmSweden Department of Physics University of Gothenburg41296 GothenburgSweden Department of Materials Science and Engineering KTHRoyal Institute of Technology10044 StockholmSweden

Magnetic force microscopy(MFM)is a powerful technique for studying magnetic microstructures and nanostructures that relies on force detection by a cantilever with a magnetic *** detected magnetic tip interactions are used to reconstruct the magnetic structure of the sample ***,we demonstrate a new method using MFM for probing the spatial profle of an operational nanoscale spintronic device,the spin Hall nano-osillator(SHNO),which generates high-intensity spin wave auto-osillations enabling novel microwave applications in magnonics and neuromorphic *** developed an MFM system by adding a microwave probe station to allow electrical and microwave characterization up to 40 GHz during the MFM ***-based on NiFe/Pt bilayers with a specific design compatible with the developed system-were fabricated and scanned using a Co magnetic force microscopy tip with 10 nm spatial MFM resolution,while a DC current sufficient to induce auto-oscillation *** results show that this developed method provides a promising path for the characterization and nanoscale magnetic field imaging of operational nano-osilators.

关键词： microwave characterization system

Antioxidant therapy in the management of acute,chronic and post-ERCP pancreatitis:A systematic review

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 Gastroenterology 2009年第36期15卷 4481-4490页

作者： Seyed Sajad Mohseni Salehi Monfared Hamed Vahidi amir hossein Abdolghaffari Shekoufeh Nikfar Mohammad Abdollahi Endocrinology and Metabolism Research Centre Tehran University of Medical Sciences Student Scientific Research Center Tehran University of Medical Science Pharmaceutical Sciences Research Center Tehran University of Medical Sciences Food&Drug Affairs and Food&Drug Laboratory Research Center Ministry of Health&Medical Education Faculty of Pharmacy and Pharmaceutical Sciences Research Center and Endocrinology&Metabolism Research CentreTehran University of Medical Sciences

We systematically reviewed the clinical trials which recruited antioxidants in the therapy of pancreatitis and evaluated whether antioxidants improve the outcome of patients with pancreatitis. Electronic bibliographic databases were searched for any studies which investigated the use of antioxidants in the management of acute pancreatitis （AP） or chronic pancreatitis （CP） and in the prevention of post-endoscopic retrograde cholangio-pancreatography （post-ERCP） pancreatitis （PEP） up to February 2009. Twenty-two randomized, placebo-controlled, clinical trials met our criteria and were included in the review. Except for a cocktail of antioxidants which showed improvement in outcomes in three different clinical trials, the results of the administration of other antioxidants in both AP and CP clinical trials were incongruent and ***, antioxidant therapy including allopurinol and N-acetylcysteine failed to prevent the onset of PEP in almost all trials. In conclusion, the present data do not support a benefit of antioxidant therapy alone or in combination with conventional therapy in the management of AP, CP or PER Further double blind, randomized, placebo-controlled clinical trials with large sample size need to be conducted.

关键词： Antioxidant Post-endoscopic retrogradecholangio-pancreatography pancreatitis Oxidative stress,Therapy Acute pancreatitis Chronic pancreatitis