检索结果-南通市图书馆

Coupling system application in photocatalytic degradation of methylorange by TiO_2, TiO_2/SiO_2 and TiO_2/SiO_2/Ag

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2015年第12期34卷 851-858页

作者： Hossein Ghasemi Mobtaker seyed javad ahmadi Shahram Moradi Dehaghi Taher Yousefi Nuclear Fuel Cycle Research School Nuclear Science and Technology Research Institute Faculty of Chemistry Tehran North Branch Islamic Azad University

Three different photocatalysts including TiO2, TiO2/SiO2 and TiO2/SiO2/Ag were synthesized via sol–gel growth method, in which colloidal silica was used as Si source, titanium tetra iso-propoxide (TTiP) as titanium source, Ag+ as dopant ion and hydroxypropyl cellulose (HPC) as dispersant. The purpose was to study the enhancement of photocatalytic activity of TiO2 by deposition on SiO2 colloids and also doping with Ag ion. The catalysts were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray fluorescence (XRF), Fourier transform infrared spectroscopy (FT-IR) and Brunauer–Emmett–Teller (BET) methods. It is confirmed that the major phase in all catalysts is anatase. Photocatalytic activity was studied in various conditions for degradation of methylorange (as a model pollutant) to evaluate the effect of some parameters on degradation efficiency. Studying the degradation process in various pH values reveals that the degradation is more efficient in acidic solution than alkaline condition. Coupling the photocatalytic process with some fields called electro-photochemical (EP), magnetic-photochemical (MP) and ultrasonic-photochemical (UP) was studied at two pH values which were compared with photochemical (P) alone. It is concluded that in most cases, the EP is the best coupled system and has the maximum efficiency. Liquid chromatography–mass spectrometry (LC–MS) analysis was used to check the complete decomposition of methylorange at the end of process.

关键词： Doping Electro-photochemical Magnetic-photochemical Ultrasonic-photochemical Sol–gel

Neuroprotective potential of traditional Ayurvedic Kadha:age-related neurological disorders:a comprehensive literature review

在线全文

学校读者我要写书评

暂无评论

Traditional Medicine Research 2024年第9期9卷 51-77页

作者： Sarvin Sadreddini Mohammad javad Emami Kazemabad Sogand Sheikholeslami Kosar Chitzan-Zadeh Mohammad Taha Kouchaki Midia Rashidi Amir Abbas Ghayerin Shahin Sabaghi Ghazal Tavakoli Sepehr Nanbakhsh Tina Mansourian Arefeh Tabashiri Fariba Arbab Mojeni Mohammed Namiq Amin Zahra Taheri seyed Esmaeil Sedighi Taraneh Tarkashvand Parham Amirazodi Mobina Fathi Shirin Yaghoobpoor Niloofar Deravi School of Medicine Tabriz University of Medical SciencesTabriz ***Iran School of Medicine Qom University of Medical SciencesQom ***Iran School of Medicine Hamadan University of Medical SciencesHamadan ***Iran School of Medicine Ahvaz Jundishapur University of Medical SciencesAhvaz ***Iran Faculty of Medicine Tabriz University of Medical SciencesTabriz ***Iran School of Medicine Iran University of Medical SciencesTehran ***Iran School of Medicine Shahid Beheshti University of Medical SciencesTehran ***Iran School of Medicine Mazandaran University of Medical SciencesSari ***Iran School of Medicine Kermanshah University of Medical SciencesKermanshah ***Iran Faculty of Pharmacy Pharmaceutical Sciences BranchIslamic Azad UniversityTehran ***Iran Department of Biology Faculty of SciencePayamNoor UniversityTehran ***Iran Faculty of Medicine Islamic Azad University of Medical ScienceTehran 193951495Iran International Campus Shahid Sadoughi University of Medical SciencesYazd ***Iran

Despite modern medicine’s advancements,age-related neurological diseases like Alzheimer’s disease and Parkinson’s disease remain challenging due to high costs,side effects,and limited ***,a traditional Indian medicine system,offers Kadha tea as a potential herbal *** review explores Kadha’s components(basil(Ocimum basilicum L.),black pepper(Piper nigrum L.),Cinnamon(Cinnamomum verum ***),ginger(Zingiber officinale Roscoe),and raisin(Vitis vinifera L.))and their interaction with various neurological *** suggest Kadha exhibits anti-inflammatory,antioxidant,and antiviral properties,potentially impacting Alzheimer’s disease,Parkinson’s disease,neurotoxicity,neuroinflammation,and brain *** focusing on specific disease mechanisms and Kadha’s intergrade effects,this review aims to elucidate its potential role in managing age-related neurological disorders.

关键词： Ayurveda Kadha neuroprotective neurological disorders traditional medicine

Carbon Isotope Stratigraphy of the Uppermost Aptian-Lower Cenomanian Strata from the Lut Block,East 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

Journal of Earth Science 2023年第6期34卷 1793-1799页

作者： javad Sharifi seyed Naser Raisossadat Maryam Mortazavi Mehrizi Maryam Motamedalshariati Department of Geology Faculty of ScienceUniversity of BirjandBirjandIran Earth Sciences Research Group University of BirjandBirjandIran

The Mid-Cretaceous interval has been recognized as a crucial period in Earth’s history,and a number of studies on Neo-Tethyan successions illustrate intense evolutions in the nature of Mid-Cretaceous ocean chemistry,sea level,and marine faunal ***,much less investigations have been conducted in the Sistan Ocean,in the eastern ***,the Nimbolook Section(Lut Block,central Iran)has provided an opportunity to address these shortcomings and provide a better understanding of the paleoenvironmental changes in this *** biostratigraphic analysis and age interpretation of the Nimbolook Section have been performed in earlier investigations by means of planktonic foraminifera,ammonites and calcareous *** provides a reliable age framework for the chemostratigraphic *** the Nimbolook Section,the δ^(13)C stratigraphy was carried out on a total of 41 samples,which ranged between -3.26‰and 2.86‰ with an average of 1.09‰(standard deviation=1.15‰),and expanded within the upper Aptian to lower Cenomanian ***,there is a prominent negative shift at the base of the section,accompanied by episodes of sea-level ***,according to the age-diagnostic calcareous nannofossils records,this carbon isotope negative shift(0.88‰ to -3.26‰)straddle between late Aptian and early Albian ***,these new chemostratigraphic observations could be interpreted as being the coeval data from the reference well-studied successions in the other parts of the world,tentatively reflecting the oceanic anoxic event(OAE)1b.

关键词： Aptian-Albian Lut Block carbon isotope stratigraphy geochemistry Iran

Impacts of Depositional Facies and Diagenesis on Reservoir Quality:A Case Study from the Rudist-bearing Sarvak Formation,Abadan Plain,SW Iran

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2023年第1期97卷 190-206页

作者： Ali ASSADI javad HONARMAND seyed Ali MOALLEMI Iraj ABDOLLAHIE-FARD Geology Division Tehran Energy Consultants(TEC)TehranIran School of Earth Sciences Damghan UniversityDamghanIran Department of Petroleum Geology Research Institute of Petroleum Industry(RIPI)TehranIran National Iranian Oil Company Exploration Directorate(NIOC)TehranIran

An integrated geological-petrophysical analysis of the rudist-bearing sequence of the Cretaceous Sarvak Formation is given one giant oilfield,and provides an improved understanding of this main reservoir in the Abadan Plain,in the Zagros Basin,SW *** main objective of this study is to evaluate reservoir potential of the Sarvak Formation,and then to utilize the calibrated well log signature to correlate reservoir potential in un-cored *** main facies are recognized and categorized in five facies groups:lagoon,shoal,rudist-biostrome,slope,and shallow open marine,deposited on a shelf carbonate *** the distribution of diagenetic products and their effects on pore systems,three diagenetic facies namely,(DF-1)low dissolution and cementation;(DF-2);high dissolution;and(DF-3)high cementation are *** initial sedimentary characteristics in combination with distribution of diagenetic products play an important role in reservoir quality *** effect of diagenetic processes related to disconformities mainly depends on the facies nature below these ***-dominated facies of shoal and rudist debris,observed below the Cenomanian–Turonian disconformity,are mostly characterized by high dissolution and interconnected pore ***,depositional and diagenetic facies in the studied wells are correlated by petrophysical well log data,leading to distribution of the reservoir *** obtained can be utilized for efficient reservoir characterization of the Sarvak Formation and its equivalent units in the Arabian Plate.

关键词： upstream petroleum facies diagenesis disconformity reservoir quality rudists Sarvak Formation Zagros Basin

Synthesis, Characterization and Ion Exchange Properties of a New Composite of Inorganic Ion Exchanger： Polyacrylonitrile Cerium（IV） Molybdophosphate

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2012年第1期30卷 177-182页

作者： ahmadi,seyed javad Yavari,Ramin Ashtari,Parviz' Gholipour,Vanik Kamel,Leila Rakhshandehru,Farokh Waste Management Department Nuclear Science and Technology Research InstituteP.O.Box 11365/8486TehranIran Faculty of Chemistry Tarbiat Moallem UniversityP.C.TehranIran

In this work, the synthesis of the composite of cerium（IV） molybdophosphate （CMP） and polyacrylonitrile （PAN） was reported （CMP-PAN）. The material has been characterized by elemental and spectral （FT-IR）, X-ray and thermal （TGA） analysis. Also the size analysis of the composite was done by scanning electron microscopy （SEM）. Its chemical stability in acidic, basic and saline solutions and radiation stability up to 100 kGy total expose dose were assessed. Whereas the synthesized composite has ion exchange properties, its ion exchange capacity and behavior toward several metal ions were also investigated. Further, the distribution coefficients of the metal ions were calculated. Finally, the ability of the synthesized CMP-PAN composite for the decontamination of low level liquid waste （LLLW） was investigated.

关键词： composite ion-exchange cerium(IV) molybdophosphate

Hydrodynamic modeling strategy for dense to dilute gas-solid fluidized beds

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2017年第2期15卷 105-116页

作者： seyed Ahmad Kia javad Aminian Faculty of Mechanical and Energy Engineering Shahid Beheshti University A.C. Tehran Iran

When investigating the hydrodynamic behavior of gas–solid flow systems, there are several options for the drag function, viscosity model, and other parameters. The low accuracy obtained with a random trial and error modeling strategy has led researchers to develop new drag models that are fine-tuned for their specific studies. However, besides the drag functions, an appropriate viscosity model together with radial distribution function have a great impact on the hydrodynamic modeling of fluidized beds. In this study, a detailed validation and verification task is conducted using three different experimental datasets to derive a modeling strategy for predicting hydrodynamic behavior in dense to dilute flow regimes of various fluidized beds. For this purpose, the steady-state Reynolds-averaged Navier–Stokes equations are solved in a finite volume scheme using the twoPhaseEulerFoam solver in the OpenFOAM 2.1.1 software. A comparative study of different drag and viscosity models enables an optimal modeling strategy to be determined for the accurate prediction of the bed pressure drop, bed expansion ratio, time-averaged solid hold-up, and bed height in various dense and dilute flow regimes. Our results show that the modeling strategy prescribed in this study is widely applicable for identifying the hydrodynamic characteristics of various gas–solid fluidized beds with different operating conditions.

关键词： Modeling strategy Hydrodynamic behavior Fluidized bed OpenFOAM Drag-viscosity model

Excess mortality in Northeast Iran caused by COVID-19:Neglect of offset community transformations of health

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 Medicine 2023年第6期16卷 261-267页

作者： Nayereh Esmaeilzadeh seyed javad Hoseini Majid Jafari Nejad-Bajestani Mohammadtaghi Shakeri Zahra Izadi Mood Hamidreza Hoseinzadeh Mohammad Hasan Derakhshan Dooghaee Department of Epidemiology School of HealthMashhad University of Medical SciencesMashhadIran Department of Medical Biotechnology and Nanotechnology Faculty of MedicineMashhad University of Medical SciencesMashhadIran Department of Persian Medicine School of Persian and Complementary MedicineMashhad University of Medical SciencesMashhadIran Department of Biostatistics School of HealthMashhad University of Medical SciencesMashhadIran Health Deputy Mashhad University of Medical SciencesMashhadIran

Objective:To make evidence-based decisions based on broad mortality trends for Razavi Khorasan province,***:In order to determine the baseline number of deaths,we used univariate time series analyses for monthly data from the monthly vital statistics reports(From April 2015 to March 2022).For excess mortalities,these baselines were subtracted from reported deaths with a 95%prediction *** compare time and causes,a P-score was ***:From March 2020 to March 2022,there were 61949 registered deaths,and the estimated deaths with a 95%confidence interval(CI)were 43246.16(35718.28,50774.05).So,in 2020-2021 and 2021-2022,the death counts were 35.15%and 51.33%higher than projected.A total of 18666 cardiovascular diseases were reported and a total of 15704.46(12006.95,19401.96)was *** P-score for this duration was 14.49%and 23.23%higher than *** and parasitic diseases plus COVID-19 were 16633 and estimated to be 1044.87(456.77,1632.96).A total of 4420 diseases of the respiratory system were reported,and 4564.94 deaths were predicted(2277.43,6852.43).In the first year of the pandemic,the P-score dropped to-35.28%and in the second year,it jumped sharply to 22.38%.Conclusions:Excess mortality,along with cause-specific mortality,can be helpful for monitoring trends and developing public health policies at the local,national,and international levels.

关键词： Mortality COVID-19 Health Systems Plans Prediction Cardiovascular deaths

A novel hybrid algorithm based on a harmony search and artificial bee colony for solving a portfolio optimization problem using a mean-semi variance approach

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 Central South University 2016年第1期23卷 181-188页

作者： seyed Mohammad seyedhosseini Mohammad javad Esfahani Mehdi Ghaffari Department of Industrial Engineering Iran University of Science and Technology Young Researchers and Elite Club Naragh BranchIslamic Azad University Department of Industrial Engineering Naragh BranchIslamic Azad University

Portfolio selection is one of the major capital allocation and budgeting issues in financial management, and a variety of models have been presented for optimal selection. Semi-variance is usually considered as a risk factor in drawing up an efficient frontier and the optimal portfolio. Since semi-variance offers a better estimation of the actual risk portfolio, it was used as a measure to approximate the risk of investment in this work. The optimal portfolio selection is one of the non-deterministic polynomial(NP)-hard problems that have not been presented in an exact algorithm, which can solve this problem in a polynomial time. Meta-heuristic algorithms are usually used to solve such problems. A novel hybrid harmony search and artificial bee colony algorithm and its application were introduced in order to draw efficient frontier portfolios. Computational results show that this algorithm is more successful than the harmony search method and genetic algorithm. In addition, it is more accurate in finding optimal solutions at all levels of risk and return.

关键词：混合算法搜索算法组合优化问题和谐最优投资组合多项式时间风险因素求解

Photodegradation of reactive blue 19 dye using magnetic nanophotocatalyst α-Fe_(2)O_(3)/WO_(3):A comparison study of α-Fe_(2)O_(3)/WO_(3)and WO_(3)/NaOH

在线全文

学校读者我要写书评

暂无评论

Water Science and Engineering 2021年第2期14卷 119-128页

作者： Mohammad Delnavaz javad Farahbakhsh seyed Sajad Mahdian Civil Engineering Department Faculty of EngineeringKharazmi UniversityTehran 15719-14911Iran School of Engineering Edith Cowan UniversityJoondalup WA 6027Australia

The photocatalytic degradation of reactive blue 19(RB19)dye was investigated in a slurry system using ultraviolet(UV)and light-emitting diode(LED)lamps as light sources and using magnetic tungsten trioxide nanophotocatalysts(α-Fe_(2)O_(3)/WO_(3)and WO_(3)/NaOH)as *** effects of different parameters including irradiation time,initial concentration of RB19,nanophotocatalyst dosage,and pH were *** magnetic nanophotocatalysts were also characterized with different methods including scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDS),transmission electron microscopy(TEM),X-ray diffraction(XRD),photoluminescence(PL),differen-tial reflectance spectroscopy(DRS),Fourier transform infrared spectroscopy(FTIR),and vibrating sample magnetometry(VSM).The XRD and FTIR analyses confirmed the presence of tungsten trioxide on the iron oxide *** VSM analysis confirmed the magnetic ability of the new synthesized nanophotocatalyst α-Fe_(2)O_(3)/WO_(3)with 39.6 emu/g of saturation *** reactor performance showed consid-erable improvement in the α-Fe_(2)O_(3)-modified *** impact of visible light was specifically investigated,and it was compared with UV-C light under the same experimental *** reusability of the magnetic nanophotocatalyst α-Fe_(2)O_(3)/WO_(3)was tested during six cycles,and the magnetic materials showed an excellent removal efficiency after six cycles,with just a 7%decline.

关键词： Reactive blue 19 Magnetic nanophotocatalyst a-Fe_(2)O_(3)/WO_(3) Saturation magnetization UV-C lamps