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Role of N-acetylcysteine in rifampicin-induced hepatic injury of young rats

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World Journal of Gastroenterology 2006年第2期12卷 287-291页

作者： SV Rana S Attri K Vaiphei R Pal A Attri K Singh Department of Gastroenterology Postgraduate Institute of Medical Education and ResearchChandigarh-160012India Department of Palhotogy Postgraduate Institute of Medical Education and ResearchChandigarh-160012India. Department of Surgery Govt. Medical CollegeCha-ndigarh-160012India

AIM, To study the role of N-acetylcysteine （NAC） as a protective agent in rifampicin （RMP）-induced oxidative hepatic injury of young rats. METHODS： Hepatic injury was produced by giving 50mg/kg body weight/day of RMP for 3 wk. A dose of NAC （100mg/kg body weight/day） was given in combination with RMP intraperitoneally. Analysis of lipid peroxidation, thiol levels, cytochrome P4se, superoxide dismutase （SOD）, catalase, glutathione peroxidase, reductase and transferase were estimated in liver along with the body weight, liver weight and histological observations. RESULTS： RMP exposure resulted in no change in body and liver weight while antioxidative enzymes were altered but the non protein thiol （GSH） status was well preserved. Cytochrome P450 system and peroxidation of lipids were induced by RMP exposure. Partial protection was observed with NAC against RMP-induced changes in liver, which was evidenced from the prevention of increase in lipid peroxidation and the reduction in SOD and catalase enzyme levels. CONCLUSION. NAC protects young rats against RMP- induced oxidative hepatic injury.

关键词： Rifampicin N-acetylcysteine Hepatoprotection

Studies on long lasting optical properties of Eu^(2+) and Dy^(3+) doped di-barium magnesium silicate phosphors

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Chinese Chemical Letters 2015年第9期26卷 1187-1190页

作者： Ravi Shrivastava Jagjeet Kaur govt.VYT PG Autonomous college

Di-barium magnesium silicate phosphors doped with europium and dysprosium were prepared under a weak reducing atmosphere.X-ray diffraction pattern of the sample was also done that confirmed the proper preparation of the *** electron microscope（SEM） images confirmed that the sample has regular surface and uniform grain size *** studies of phosphorescence decay of Ba2MgSi2O7：Eu^2＋,Dy^3＋ phosphors with different concentration of Dy^3＋ were *** phosphor with 0.5/1.5 mol%of Eu/Dy,exhibited optimum green color afterglow *** emission is expected to arise due to transition of Eu^2＋ ions from any of the sublevels of 4f^65d^1 configuration to ^8S（7/2） level of the 4f7 *** a suitable trap depth,the trap concentration is expected to be proportional to the concentration of Dy^3＋.These traps are responsible for holding the charge career for a reasonable time,subsequently for increasing the time of ***,optimum Dy3＊ concentration produces the longer afterglow duration with higher intensity of luminescence *** depth were also calculated using thermoluminescence glow curve which was indicative of formation of traps suitable for long afterglow.

关键词： Phosphorescence XRD Persistence luminescence Trapping center

Bianchi type-I cosmological models with perfect fluid in general relativity

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Research in Astronomy and Astrophysics 2010年第4期10卷 291-300页

作者： Rishi Kumar Tiwari Department of Mathematics Govt.Model Science College

Einstein＇s field equations with variable gravitational and cosmological constants are considered in the presence of perfect fluid for the Bianchi type-I universe by assuming that the cosmological term is proportional to R-m （R is a scale factor and m is a constant）.A variety of solutions are *** physical significance of the respective cosmological models are also discussed.

关键词： cosmological parameters - cosmology: theory - relativity

Spin-Dependent Electron Tunneling in ZnSe/Zn_(1-x)Mn_xSe Heterostructures with Double δ-Potentials

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Communications in Theoretical Physics 2019年第3期71卷 339-343页

作者： L.Bruno Chandrasekar M.Karunakaran K.Gnanasekar Department of Physics The American College Department of Physics Alagappa Govt. Arts College

Using the matrix method, spin-dependent tunneling properties such as barrier transparency, the degree of resonance polarization, and tunneling lifetime of electrons are examined in the non-magnetic/diluted magnetic semiconductor heterostructure. The effects of the double δ-potential and the magnetic field are discussed on the transport properties of the electrons. The introduction of double δ-potential shifts the resonance peak of polarization to the higher energy value. Both height and position of the δ-potential influence the degree of resonance polarization in the considered heterostructure. The increasing magnetic field enhances the spin-polarization.

关键词： matrix method heterostructure δ-potential

Melting Characteristics of a Phase Change Material Mixed with Nano Particles of Cobalt Oxide Bounded in a Trapezoidal Structure

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Computer Modeling in Engineering & Sciences 2022年第1期130卷 255-268页

作者： Waris Ali Asif Ali Shaikh Feroz Shah Sajjad Hussain Department of Basic Sciences and Related Studies Mehran University of Engineering and TechnologyJamshoroPakistan School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore Department of Mathematics Govt Postgraduate College LayyahPunjabPakistan

A novel trapezoidal design for storage of heat energy through melting of phase-change material(PCM)is *** heat thermal energy storage system(LHTES)is a promising option to diminish mis-match between energy consumption and *** this purpose,Paraffin:Rubitherm-35(RT35)material is successively melted in aluminum structure which is heated from one side and the other sides are kept *** of PCM is observed experimentally and melt fronts are photographed for various time *** fluid-solid module in COMSOL Multiphysics 5.4 has been *** transient heat conduction with enthalpy function is *** are carried out for enhancement of thermal conductivity through addition of nano-entities of cobalt oxide *** time is notably reduced with inclusion of nano-entities to enhance thermal *** time spans for melt start and total melt in case of pure PCM are 375 and 4500(s)respectively whereas for the nano mix case,these are 150 and 3000 *** 33%shorter time length is noticed for charging of the PCM trapezoidal matrix with nano entities of Co3O4 *** results fromsimulation and lab observations depict similar patterns and are in quite close comparison.

关键词： Trapezoidal enclosure nano entities heat transfer phase change material COMSOL multiphysics 5.4 numerical simulation

Interplanetary consequences and geoeffectiveness of CME associated with major solar flare from NOAA AR 12673

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Research in Astronomy and Astrophysics 2020年第2期20卷 85-93页

作者： Shirsh Lata Soni Radhe Shyam Gupta Pyare Lala Verma Department of Physics Govt.P.G.CollegeSatnaMP 485001India Department of Physics Govt.P.G.College MaiharSatnaMPIndia

In this reported work,we study a major X-class flare(X9.3) that arose from NOAA Active Region(AR) 12673 on 2017 September 6,from 11:53 UT to 12:10 UT in multi-wavelength *** event also produced a fast coronal mass ejection(CME).NOAA AR 12673 emerged at S09 W30 on 2017 September6 and grew rapidly to a large *** 2017 September 9,the maximum area of this AR was 1060 millionth of the solar *** group of sunspots disappeared over the west limb of the Sun(S09 W83) on September *** was a fast emerging flux *** group of sunspots showed magnetic configuration category *** identified their earliest signatures of eruption in AIA 94A images with initialization and successive rapid growth from low coronal heights of hot channeled *** the other hand,the CME associated with this flare event triggered the intense Dst at 1 AU(–142 nT).We have acquired observations and analyze the reported event from the Sun’s surface,corona(source AR),interplanetary space and in-situ measurement near *** addition,here we analyze the complex processes of CMECME interaction that have contributed a significant role to make the reported event so geoeffective.

关键词： Solar wind Coronal Mass Ejection(CME) Sun

Neutrino Mass Generation in SO(4) Model

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Communications in Theoretical Physics 2010年第8期54卷 305-307页

作者： Indranath Bhattacharyya Department of Mathematics Govt.College of Engineering and Ceramic Technology

Generation of neutrino mass in SO（4） model is proposed here. The algebraic structure of SO （4） is same as to that ofSU（2）L x SU（2）R. It is shown that the spontaneous symmetry breaking results three massive as well as three massless gauge bosons. The standard model theory according to which there exist three massive gauge bosons and a massless one is emerged from this model. In the framework ofSU（2）L x SU（2）R a small Dirac neutrino mass is derived. It is also shown that such mass term may vanish with a special choice. The Majorana mass term is not considered here and thus in this model the neutrino mass does not follow seesaw structure.

关键词： left right symmetry S0(4) modei extension of electroweak gauge sectors neutrino mass generation Dirac neutrino mass

Recent Trends in Preparation and Applications of Biodegradable Polymer Composites

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Journal of Renewable Materials 2020年第10期8卷 1305-1326页

作者： Haina Sagheer Gul Muhammad Awais Saira Jabeen Muhammad Farooq Department of Chemistry Government Postgraduate CollegeMansehra21300Pakistan Department of Chemistry Hazara UniversityMansehra21300Pakistan Department of Botany Government Postgraduate CollegeMansehra21300Pakistan

This review efficiently covers the research progress in the area of polymer bio composites in perspective of the modern-day renewable *** the last decade,attraction towards the bio-composite based systems has been the topic of interest due to their potential as a substitute of conventional materials produced in important manufacturing ***,preparation of biocompatible and biodegradable polymer composites is an important achievement as an alternative of petrochemical based renewable *** production of eco-friendly bio-composite materials have been achieved with natural fibers viz jute,bamboo,hair,flex,wool,silk and many others instead of synthesized fibers like carbon,glass dispersed in synthesized resins viz poly vinyl alcohol,epoxy and ***materials based on natural fibers dispersed in natural matrix like natural rubber or polyester have also been obtained with endless applications for the *** utilization of such materials for the good well of mankind is attributed to their ease of disposal and being *** last but not the least,the extraordinary mechanical properties of bio-composites make them superior to many other conventional *** review paper addresses the recent trends,mechanical and chemical properties,synthesis,and application of bio-composites in the recent years.

关键词： Renewable bio-composites eco-friendly composites

Discrete Numerical Study on Type II Fracture of Partially Detached Concrete Panels in Cold Region

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Structural Durability & Health Monitoring 2025年第1期19卷 167-191页

作者： Huayi Zhang Maobin Song Lei Shen Nizar Faisal Alkayem Maosen Cao college of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing210024China Haihe River Huaihe River and Xiaoqinghe River Basin Water Conservancy Management and Service Center of Shandong ProvinceJinan250100China college of Mechanics and Engineering Science Hohai UniversityNanjing211100China

When the upper chord beam of the beam-string structure(BSS)is made of concrete-ﬁlled steel tube(CFST),its overall stiffness will change greatly with the construction of concrete placement,which will have an impact on the design of the tensioning plans and selection of control measures for the *** order to accurately obtain the bending stiffness of CFST beam and clarify its impact on the mechanical properties of composite BSS during con-struction,the inﬂuence of some factors such as height-width ratio,wall thickness of steel tube,elasticity modulus of concrete,and friction coefﬁcient on the bending stiffness are analyzed parametrically by the numerical simula-tion technology based on an actual *** calculation formula of the equivalent bending stiffness of CFST is also established through mathematical statistical ***,the equivalent bending stiffness is introduced into the construction and use stages of the composite BSS,respectively,and the mechanical properties such as prestress-tensioning control value,structural deformation,and internal force of key members are comparatively analyzed when adopting two different construction ***,the optimal construction plan of concrete placementﬁrst and then prestress-tensioning is proposed.

关键词： Beam-string structure(BSS) concrete-ﬁlled steel tube(CFST) bending stiffness timing of concrete placement prestress-tensioning