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Synthesis of phenanthrimidazole from 9,10-phenanthraquinone and aldehydes by molecular iodine as catalyst

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Chinese Chemical Letters 2009年第1期20卷 5-8页

作者： Hossein Behmadi Mina roshani Seyed Mahdi Saadati Department of Chemistry Faculty of Basic SciencesIslamic Azad UniversityMashhad Branch Department of Chemistry Faculty of Basic SciencesIslamic Azad University

A new,convenient,efficient,and cost-effective one-pot synthesis of 1H-phenanthro[9,10]imidazol-2-yl from phenantherenquinone and aldehydes,using molecular iodine as catalyst is *** present methodology offers several a... 详细信息

关键词： 1H-Phenanthroimidazol-2-yl Phenantherenquinone Molecular iodine

General laws of funding for scientific citations:how citations change in funded and unfunded research between basic and applied sciences

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Journal of Data and Information Science 2024年第4期9卷 71-89页

作者： Mario Coccia Saeed roshani CNR--National Research Council of Italy IRCRES-CNR-Turin Research Area CNRStrada delle Cacce73-10135-TurinItaly Arizona State University School of Complex Adaptive SystemsTempeAZ 85281-2701USA Allameh Tabataba’i University Department of Technology and Entrepreneurship ManagementDehkadeh-ye-OTehran***Iran

Purpose:The goal of this study is to analyze the relationship between funded and unfunded papers and their citations in both basic and applied ***/methodology/approach:A power law model analyzes the relationship between research funding and citations of papers using 831,337 documents recorded in the Web of Science ***:The original results reveal general characteristics of the diffusion of science in research fields:a)Funded articles receive higher citations compared to unfunded papers in journals;b)Funded articles exhibit a super-linear growth in citations,surpassing the increase seen in unfunded *** finding reveals a higher diffusion of scientific knowledge in funded ***,c)funded articles in both basic and applied sciences demonstrate a similar expected change in citations,equivalent to about 1.23%,when the number of funded papers increases by 1%in *** result suggests,for the first time,that funding effect of scientific research is an invariant driver,irrespective of the nature of the basic or applied ***/value:This evidence suggests empirical laws of funding for scientific citations that explain the importance of robust funding mechanisms for achieving impactful research outcomes in science and *** findings here also highlight that funding for scientific research is a critical driving force in supporting citations and the dissemination of scientific knowledge in recorded documents in both basic and applied *** implications:This comprehensive result provides a holistic view of the relationship between funding and citation performance in science to guide policymakers and R&D managers with science policies by directing funding to research in promoting the scientific development and higher diffusion of results for the progress of human society.

关键词： Research funding Citations Scientific development Science diffusion Scientific laws Power law model Matthew effect Science policy Research policy Science of science Dynamics of science Evolution of science

Research funding and citations in papers of Nobel Laureates in Physics, Chemistry and Medicine, 2019-2020

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Journal of Data and Information Science 2024年第2期9卷 56-80页

作者： Mario Coccia Saeed roshani CNR-National Research Council of Italy IRCRES-CNRTurin Research Area of the CNRStrada delle Cacce73-10135-TurinItaly Arizona State University School of Complex Adaptive Systems1031 S.Palm WalkTempeAZ 85281-2701USA Allameh Tabataba’i University Department of Technology and Entrepreneurship ManagementDehkadeh-ye-OTehran***Iran

Purpose:The goal of this study is a comparative analysis of the relation between funding(a main driver for scientific research)and citations in papers of Nobel Laureates in physics,chemistry and medicine over 2019-2020 and the same relation in these research fields as a ***/methodology/approach:This study utilizes a power law model to explore the relationship between research funding and citations of related *** study here analyzes 3,539 recorded documents by Nobel Laureates in physics,chemistry and medicine and a broader dataset of 183,016 documents related to the fields of physics,medicine,and chemistry recorded in the Web of Science ***:Results reveal that in chemistry and medicine,funded researches published in papers of Nobel Laureates have higher citations than unfunded studies published in articles;vice versa high citations of Nobel Laureates in physics are for unfunded studies published in ***,when overall data of publications and citations in physics,chemistry and medicine are analyzed,all papers based on funded researches show higher citations than unfunded ***/value:Results clarify the driving role of research funding for science diffusion that are systematized in general properties:a)articles concerning funded researches receive more citations than(un)funded studies published in papers of physics,chemistry and medicine sciences,generating a high Matthew effect(a higher growth of citations with the increase in the number of papers);b)research funding increases the citations of articles in fields oriented to applied research(e.g.,chemistry and medicine)more than fields oriented towards basic research(e.g.,physics).Practical implications:The results here explain some characteristics of scientific development and diffusion,highlighting the critical role of research funding in fostering citations and the expansion of scientific *** finding can support decision-making of policymakers and R&D mana

关键词： Research funding Citations Science diffusion Scientific change Science of Science Power-law distribution Basic research Applied research Matthew effect Nobel Laureates Nobel Prizes

Increase of forest carbon biomass due to community forestry management in Nepal

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Journal of Forestry Research 2018年第2期29卷 424-433页

作者： Anup K C roshani Manandhar Rajeshor Paudel Sujan Ghimire Department of Environmental Science Amrit CampusTribhuvan University Central Department of Environmental Science Tribhuvan University Department of Environmental Science Tri-Chandra CampusTribhuvan University

Community forest management helps in mitigating deforestation and forest degradation by addressing the negative aspects of rural livelihoods such as poverty and social *** is important in regulating global climate by encouraging sequestration of carbon in shoots,roots and *** studied the status of community forest management,forest resource harvest and carbon stocks in two community forests of the mid hill region of central and western *** study was based on primary and secondary data collected through carbon stock measurement from field visits and allometric equations,household surveys,focus group discussions,key informant interviews,and review of past *** variables such as gender,age group,livestock and landholding status were related to resource utilization,conservation,and management of community *** resources such as timber,firewood,fodder and leaf litter were harvested in sustainable *** were involved in forest thinning,co-management meetings,guarding and planting trees for forest conservation and *** and carbon stock of trees increased gradually in comparison to a previous *** recommend further research on other community forests for more accurate and better results.

关键词： Community forest management Resource use Carbon stock Nepal

A high performance gas–liquid two-phase flow meter based on gamma-ray attenuation and scattering

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Nuclear Science and Techniques 2017年第11期28卷 271-279页

作者： G. H. roshani E. Nazemi Electrical Engineering Department Kermanshah University of Technology Kermanshah Iran Nuclear Science and Technology Research Institute TehranIran Radiation Application Department Shahid Beheshti University Tehran Iran

The ability to precisely estimate the void fraction of multiphase flow in a pipe is very important in the petroleum industry. In this paper, an approach based on our previous works is proposed for predicting the void fraction independent of flow regime and liquid phase density changes in gas–liquid two-phase flows. Implemented technique is a combination of dual modality densitometry and multi-beam gamma-ray attenuation techniques. The detection system is comprised of a single energy fan beam,two transmission detectors, and one scattering detector. In this work, artificial neural network(ANN) was also implemented to predict the void fraction percentage independent of the flow regime and liquid phase density changes. Registered counts in three detectors and void fraction percentage were utilized as the inputs and output of ANN, respectively. By applying the proposed methodology, the void fraction was estimated with a mean relative error of less than just 1.2480%.

关键词： Gamma-ray Transmission and scattering Artificial neural network Density independent Flow regime independent Void fraction

Outcome measures following tele-rehabilitation and conventional face to face rehabilitation in paediatric cochlear implant users during COVID-19 pandemic:A pilot study in a tertiary care setup

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Journal of Otology 2022年第1期17卷 31-38页

作者： Himanshu Verma Banumathy N roshani Mishra Naresh K.Panda Department of Otolaryngology and Head&Neck Surgery Post Graduate Institute of Medical Education and ResearchChandigarh160012India

Background:Following the COVID-19 pandemic,majority of paediatric cochlear implantees(CI)lost follow ups for rehabilitation and tele-therapy was *** study thus compared the outcome measures of paediatric CI users on tele-therapy versus conventional face to face therapy following COVID-19 ***:Twenty seven unilateral paediatric cochlear implantees in the age range of 2e11 years were divided into two groups based on the therapy modality,viz,tele-and face-to-face *** on the hearing age,participants were further divided into three groups,viz,0e2,2e4,and greater than four years.A complete the test battery comprising Integrated Scales of Development,Speech Intelligibility Rating scale,and Revised Categorical Auditory Perception were *** speech&language test battery was performed prior to initiating the rehabilitation and post 12 months of ***:Results of the present study revealed that conventional rehabilitation had better outcomes compared to *** rate of progress after one year of rehabilitation with respect to hearing-age showed a significant difference for the hearing-age group of 0e2 years across the domains of audition,speech and ***:The present study indicates that conventional method of the speech-language and auditory rehabilitation is far better compared to the tele rehabilitation services especially for those visiting tertiary care hospitals as most of them belong to lower and middle socioeconomic *** the results,it can be delineated that with lesser hearing experience,paediatric CI users always need to initially enroll for conventional therapy for better speech-language and auditory outcomes.

关键词： Cochlear implant Tele-therapy Conventional therapy Language outcomes Speech&language rehabilitation

A rapid synthesis of isoxazolo[5,4-d]pyrimidin-4(5H)-ones under microwave irradiation with solid acid catalysis in solvent-free conditions

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Chinese Chemical Letters 2008年第5期19卷 525-528页

作者： A.Davoodnia M.roshani S.H.Malaeke M.Bakavoli Department of Chemistry School of Sciences Islamic Azad UniversityMashhad BranchMashhad 91735-413Iran

A rapid and efficient method for the synthesis of isoxazolo[5,4-d]pyrimidin-4（5H）-ones has been developed through cyclocondensation of 5-aminoisoxazole-4-carboxamides with orthoesters under conventional heating and solvent-free microwave irradiation with solid acid catalysis. In comparison, the reactions are faster and the yields are higher under microwave irradiation.

关键词： Isoxazolo[5,4-d]pyrimidin-4(5H)-ones Orthoesters Microwave irradiation Conventional heating

Combination of a gamma radiation-based system and the adaptive network-based fuzzy inference system(ANFIS)for calculating the volume fraction in stratified regime of a three-phase flow

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Radiation Detection Technology and Methods 2018年第2期2卷 47-59页

作者： G.H.roshani A.Karami E.Nazemi Electrical Engineering Department Kermanshah University of TechnologyKermanshahIran Mechanical Engineering Department Razi UniversityKermanshahIran Nuclear Science and Technology Research Institute(NSTRI) TehranIran

Background Understanding the volume fraction of water-oil-gas three-phase flow is of significant importance in oil and gas *** The current research attempts to indicate the ability of adaptive network-based fuzzy inference system(ANFIS)to forecast the volume fractions in a water-oil-gas three-phase flow *** The current investigation devotes to measure the volume fractions in the stratified three-phase flow,on the basis of a dual-energy metering system consisting of the 152Eu and 137Cs and one NaI detector using *** summation of volume fractions is equal to 100%and is also a constant,and this is enough for the ANFIS just to forecast two volume *** the paper,three ANFIS models are *** first network is applied to forecast the oil and water volume *** next to forecast the water and gas volume fractions,and the last to forecast the gas and oil volume *** the next step,ANFIS networks are trained based on numerical simulation data from MCNP-X *** The accuracy of the nets is evaluated through the calculation of average testing *** average errors are then *** model in which predictions has the most consistency with the numerical simulation results is selected as the most accurate predictor *** on the results,the best ANFIS net forecasts the water and gas volume fractions with the mean error of less than 0.8%.Conclusion The proposed methodology indicates that ANFIS can precisely forecast the volume fractions in a water-oil-gas three-phase flow system.

关键词： Stratified regime Three-phase flow Volume fraction Accuracy Fuzzy-based inference system Forecast

Efficient preparation of Zr(Ⅳ)-salen grafted mesoporous MCM-41catalyst for chemoselective oxidation of sulfides to sulfoxides and Knoevenagel condensation reactions

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Chinese Journal of Catalysis 2015年第11期36卷 1852-1860页

作者： Maryam Hajjami Farshid Ghorbani Sedighe Rahimipanah Safoora roshani 伊拉姆大学理学院化学系库尔德斯坦大学自然资源学院环境系

Zr（IV）-salen-MCM-41 was prepared by reaction of NH2-MCM-41 with salicylaldehyde to afford Schiff base ligands. Thereafter, ***2O was reacted with the Schiff base ligands for complex formation. The structural properties of the synthesized materials were investigated by a number of analytical techniques including X-ray diffraction, N2 sorption-desorption, thermogravimetric analysis, Fourier transform infrared spectroscopy, inductively coupled plasma atomic emission spectroscpopy, and energy dispersive X-ray spectroscopy. Catalytic studies of the mesoporous materials functionalized with Zr（IV）-Schiff base complexes were investigated and extended to selective oxida- tion of sulfides to sulfoxides and the Knoevenagel condensation reactions of aldehydes with malo- nonitriles and ethyl cyanoacetate. Additionally, catalyst recycling of the Zr-salen-MCM-41 materials was also studied.

关键词： Zr(IV)-salen-MCM-41 Mesoporous material Sulfoxide Knoveonagel condensation Sulfide