检索结果-南通市图书馆

An Efficient and Novel Synthesis of Carbamate Esters from the Coupling of Amines, Halides and Carbon Dioxide in the Presence of Basic Resin

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 2006年第10期17卷 1309-1312页

作者： Devdutt CHATURVEDI Nisha.mishra Virendra.mishra Medicinal & Process Chemistry Division Central Drug Research Institute Lucknow-226001 U. P. India Synthetic Research Lab Department of Chemistry B. S. A. College Mathura-281004 U. P. India

A convenient, efficient, one-pot, novel process has been developed for the synthesis of carbamates from corresponding alkyl halides and amines using basic resin/CO2 system.

关键词： Basic resin (Ambedite IRA 400) alkyl halides carbon dioxide amines carbamates.

Inclusion of Finite Permeability on Design and Optimization of an Electromagnetic Undulator

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2014年第3期31卷 55-57页

作者： Vijay Huse Geetanjali Sharma Swati mishra G. mishra School of Physics Devi Ahilya University Indore 452001 (M.P.) India

We derive an alternate analytical expression for the optimum dimensions of an electromagnetic undulator with a finite permeability lamination core. The analytical expressions are compared with earlier results under an... 详细信息

关键词： Laminating

Novel synthesis with an atomized microemulsion technique and characterization of nano-calcium carbonate(CaCO_3)/poly(methyl methacrylate) core-shell nanoparticles

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 2013年第6期11卷 760-767页

作者： Aniruddha Chatterjee Satyendra.mishra University Institute of Chemical Technology North Maharashtra University

The synthesis of hard-core/soft-shell calcium carbonate （CaCO3）/poly（methyl methacrylate）（PMMA） hybrid structured nanoparticles （〈100nm） by an atomized microemulsion polymerization process is reported. The polymer chains were anchored onto the surface of nano-CaCO3 through use of a cou- pling agent, triethoxyvinyl silane （TEVS）. Ammonium persulfate （APS）, sodium dodecyl sulfate （SDS） and n-pentanol were used as the initiator, surfactant and cosurfactant, respectively. The polymeriza- tion mechanism of the core-shell latex particles is discussed. The encapsulation of nano-CaCO3 by PMMA was confirmed using a transmission electron microscope （TEM）. The grafting percentage of the core-shell particles was investigated by thermogravimetric analysis （TGA）. The nano-CaCO3/PMMA core-shell par- ticles were characterized by Fourier transform infrared （FTIR） spectroscopy and differential scanning calorimetry （DSC）. The FTIR results revealed the existence of a strong interaction at the interface of the nano-CaCO3 particle and the PMMA, which implies that the polymer chains were successfully grafted onto the surface of the nano-CaCO3 particles through the link of the coupling agent, In addition, the TGA and DSC results indicated an enhancement of the thermal stability of the core-shell materials compared with that of the pure nano-PMMA, The nano-CaCO3/PMMA particles were blended into a polypropylene （PP） matrix by melt processing. It can also be observed using scanning electron microscopy （SEM） that the PMMA chains grafted onto the CaCO3 nanoparticles interfere with the aggregation of CaCO3 in the polymer matrix （PP matrix） and thus improve the compatibility of the CaCO3 nanoparticles with the PP matrix.

关键词： Atomized microemulsion Core-shell nanoparticles Thermal properties Compatibility of core-shell nanoparticles with polymer matrix

Sustainable Integrated Inventory Model for Substitutable Deteriorating Items Considering Both Transport and Industry Carbon Emissions

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2022年第3期31卷 267-287页

作者： Ranu Singh Vinod Kumar mishra Department of Mathematics and Scientific Computing Madan Mohan Malaviya University of TechnologyGorakhpur-273010U.P.India

Sustainable integrated inventory management policy focuses on reducing the environmental impact of the manufacturing and transport *** study develops an integrated single-manufacturer single-buyer inventory model for substitutable deteriorating items considering transport and industry carbon *** article categorizes carbon emissions into two parts:direct and indirect *** also assume two mutually substitutable items,and substitution is considered on the buyer's *** one of the items is out of stock,the demand for that item can be partially satisfied by the stock of the other item;else,demand will be *** purpose of this study is to minimize the integrated cost of the supply chain with total carbon emissions produced by industry and transport sectors and to determine the optimal number of deliveries,order level and carbon emission quantity.A solution procedure is developed to find the optimal values of the *** experiments and sensitivity analyses are presented to demonstrate the proposed model.

关键词： Integrated inventory model sustainability deteriorating items substitutable items carbon emission

Investigation of dense slurry suspensions with coaxial mixers:Influences of design variables through tomography and mathematical modelling

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 2022年第6期20卷 1-16页

作者： Prakash mishra Farhad Ein-Mozaffari Department of Chemical Engineering Ryerson UniversityTorontoM5B 2K3Canada

The coaxial mixers enhance the suspension of concentrated slurries in an agitated *** this research work,the complex slurry suspension and dissemination behavior in a coaxial slurry mixing system(comprised of a close clearance anchor rotating with a low speed and an inner axial impeller rotating with a high speed)was analyzed employing ERT(electrical resistance tomography,a non-intrusive flow visualization technique),and computational fluid dynamics(CFD).The numerical models were validated by comparing the axial solid concentration profiles generated using the ERT data and the CFD simulation *** influences of various important parameters such as the diameter of the inner axial impeller,the inner impeller type,and the inner impeller spacing on the hydrodynamic characteristics of the slurry suspensions in a coaxial mixing vessel were thoroughly *** radial and axial velocity profiles of solid particles were generated using the validated mathematical *** assessment of energy loss due to the solid-solid collisions,the particle-fluid frictions,and the particle-vessel wall collisions was *** evaluation of optimum inner impeller clearance and inner impeller diameter is essential to attain a high degree of solids suspension and dissemination in a coaxial slurry mixing system.

关键词： Coaxial mixer Slurry suspension Homogeneity Mixing index Electrical resistance tomography(ERT) Computational fluid dynamics(CFD)

Relating Maxwell's demon and quantitative analysis of information leakage for practical imperative programs

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 Physics B 2017年第10期26卷 122-131页

作者： Kushal Anjaria Arun mishra Department of Computer Science & Engineering DIAT

Shannon observed the relation between information entropy and Maxwell demon experiment to come up with information entropy formula. After that, Shannon＇s entropy formula is widely used to measure information leakage in imperative programs. But in the present work, our aim is to go in a reverse direction and try to find possible Maxwell＇s demon experimental setup for contemporary practical imperative programs in which variations of Shannon＇s entropy formula has been applied to measure the information leakage. To establish the relation between the second principle of thermodynamics and quantitative analysis of information leakage, present work models contemporary variations of imperative programs in terms of Maxwell＇s demon experimental setup. In the present work five contemporary variations of imperative program related to information quantification are identified. They are：（i） information leakage in imperative program, （ii） imperative multi- threaded program, （iii） point to point leakage in the imperative program, （iv） imperative program with infinite observation, and （v） imperative program in the SOA-based environment. For these variations, minimal work required by an attacker to gain the secret is also calculated using historical Maxwell＇s demon experiment. To model the experimental setup of Maxwell＇s demon, non-interference security policy is used. In the present work, imperative programs with one-bit secret information have been considered to avoid the complexity. The findings of the present work from the history of physics can be utilized in many areas related to information flow of physical computing, nano-computing, quantum computing, biological computing, energy dissipation in computing, and computing power analysis.

关键词： information Maxwell's demon second principle of thermodynamics information security reversible system

Dietary fiber in poultry nutrition and their effects on nutrient utilization,performance,gut health,and on the environment:a review

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2022年第1期13卷 1-16页

作者： Rajesh Jha Pravin mishra Department of Human Nutrition Food and Animal SciencesCollege of Tropical Agriculture and Human ResourcesUniversity of Hawaii at ManoaHonoluluHI 96822USA

Dietary fiber(DF)was considered an antinutritional factor due to its adverse effects on feed intake and nutrient ***,with increasing evidence,scientists have found that DF has enormous impacts on the gastrointestinal tract(GIT)development,digestive physiology,including nutrient digestion,fermentation,and absorption processes of *** may help maintain the small and large intestine’s integrity by strengthening mucosal structure and functions and increasing the population and diversity of commensal bacteria in the *** DF content benefits digestive physiology by stimulating GIT development and enzyme *** the inclusion of fiber at a moderate level in diets also alters poultry growth *** improves gut health by modulating beneficial microbiota in the large intestine and enhancing immune ***,determining the source,type,form,and level of DF inclusion is of utmost importance to achieve the above-noted *** paper critically reviews the available information on dietary fibers used in poultry and their effects on nutrient utilization,GIT development,gut health,and poultry *** these functions will help develop nutrition programs using proper DF at an appropriate inclusion level that will ultimately lead to enhanced DF utilization,overall health,and improved poultry growth ***,this review will help researchers and industry identify the sources,type,form,and amount of DF to be used in poultry nutrition for healthy,costeffective,and eco-friendly poultry production.

关键词： Chicken Dietary fiber Environment Gastrointestinal tract Immunity Intestinal microbiota

Bouncing scenario of general relativistic hydrodynamics in extended gravity

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2021年第2期73卷 96-101页

作者： A Y Shaikh B mishra Department of Mathematics Indira Gandhi MahavidyalayaRalgaon-445402India Department of Mathematics Birla Institute of Technology and Science PilaniHyderabad CampusHyderabud-500078India

In this paper,we have framed bouncing cosmological model of the Universe in the presence of general relativistic hydrodynamics in an extended theory of *** metric assumed here is the flat Friedmann–Robertson–Walker space–time and the stress energy tensor is of perfect *** general relativity(GR)has certain issues with late time cosmic speed up phenomena,here we have introduced an additional matter geometry coupling that described the extended gravity to *** dynamical parameters are derived and *** dynamical behavior of the equation of state parameter has been *** have observed that the bouncing behavior is mostly controlled by the coupling parameter.

关键词： FRW metric extended gravity bouncing scenario energy conditions

Nix-TB and ZeNix trials:Paving the way for shorter regimens for drug-resistant tuberculosis

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2021年第10期14卷 431-432页

作者： Gyanshankar mishra Department of Respiratory Medicine Indira Gandhi Government Medical CollegeNagpurMaharashtraIndia

Drug-resistant tuberculosis(DR-TB)continues to be a public health *** 2019,nearly half a million patients had rifampicin-resistant tuberculosis(RR-TB),with 78%of those having multidrug-resistant TB(MDR-TB).India(27%),... 详细信息

关键词： tuberculosis regimen shorter