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Asian Herpetological research 2011年第2期2卷 103-109页

作者： Vidya r.CHANDAVAr prakash r.NAIK Yuvaraja's College University of Mysore Endocrinology Laboratory Department of Studies in ZoologyUniversity of Mysore

The pancreas of Eutropis carinata was studied immunocytochemically for the presence and topographic distribution of glucagon and insulin cells during annual reproductive cycles. The study revealed paracrine arrangement of the two types of ceils. The immunolocalized pancreatic cells revealed significant differences in mean numbers during different periods of reproduction. The numbers of glucagon-immunoreactive （GIr） and insulin-immunoreactive （IIr） cells were highest during the recrudesceut period which corresponded with low serum glucose level. Between the two immunoreactive cells, the GIr cells were predominant. Morphological differences between the two cells were observed by electron microscopy after staining with uranyl acetate and lead citrate. Serum glucose showed that cyclic change was highest during the reproductive period.

关键词： endocrine cell pancreas serum glucose reproductive cycle skink

Low temperature raman study of PrCoO_3 thin films on LaAlO_3(100) substrates grown by pulsed laser deposition

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Journal of Central South University 2010年第6期17卷 1144-1147页

作者： prakash r KUMAr S LEE C G SONG JI Department of Mechanical Engineering Changwon National UniversityChangwon 641773Korea School of Nano and Advanced Materials Engineering Changwon National UniversityChangwon 641773Korea

Thin films of PrCoO3 were deposited on LaAlO3 substrates by pulsed laser deposition technique.X-ray diffraction result indicates that films are single phase and c-axis *** investigate the spin state transition,raman spectroscopy measurements were performed at different *** position of the raman modes is found to increase while full width at half maximum(FWHM) of these modes is found to decrease with the decrease of temperature across spin state transition temperature(220 K) of PrCoO3.

关键词： PrCoO3 thin films raman spectroscopy pulsed laser deposition

Analysis of a Cashew Shell and Fly Ash rich Brake Liner Composite Material

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Fluid Dynamics & Materials Processing 2023年第3期19卷 569-577页

作者： r.Selvam L.Ganesh Babu Joji Thomas r.prakash T.Karthikeyan T.Maridurai Department of Mechanical Engineering Saveetha Engineering CollegeChennaiTamilnaduIndia Department of Mechatronics Faculty of EngineeringTishk International UniversityErbilIraq Department of Mechanical Engineering Chouksey Engineering CollegeBilaspurChhattisgarh Department of Mechanical Engineering Saveetha School of EngineeringSIMATSChennaiIndia

Hybrid materials collected from organic and inorganic sources,which are traditionally used as brake lining materials,generally include fly ash,cashew shell powder,phenolic resins,aluminium wool,barites,lime powder,carbon powder and copper *** present research focuses on the specific effects produced by fly ash and aims to provide useful indications for the replacement of asbestos due to the health hazards caused by the related ***,the financial implications related to the use of large-volume use of fly ash,lime stone and cashew shell powder,readily available in most countries in the world,are also *** is shown that many manufacturing and automotive industries,which are currently experiencing difficulties in meeting the increasing demand for brake lining material,may take advantage from the proposed solution.

关键词： Friction coefficient wear composite brake lining binders

A dysregulated calcium homeostasis as the earliest pathological sign in stem cell-derived Parkinson's disease neurons?

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Neural regeneration research 2024年第7期19卷 1421-1422页

作者： Nilima prakash Working Group Human Stem Cell research Department Hamm 2Hamm-Lippstadt University of Applied SciencesHammGermany

Parkinson’s disease(PD) is characterized by the slow and progressive demise of dopamine(DA)-synthesizing neurons in the substantia nigra pars compacta(SNc),a nucleus located in the human ventral *** death also affects other regions in the brain at later stages of *** concomitant lack of DA in the human forebrain(striatum) leads to the typical motor symptoms of this still uncurable neurodegenerative disorder.

关键词： homeostasis dopamine death

Influence of Ti^(4+) doping on hyperfine field parameters of Mg_(0.95)Mn_(0.05)Fe_(2-2x)Ti_(2x)O_4(0≤x≤0.7)

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Journal of Central South University 2010年第6期17卷 1139-1143页

作者： KUMAr S prakash r ALIMUDDIN CHOI H K KOO B H SONG J I CHUNG H JEONG H LEE C G School of Nano and Advanced Materials Engineering Changwon National UniversityChangwon 641773Korea Department of Mechanical Engineering Changwon National UniversityChangwon 641773Korea Department of Applied Physics Aligarh Muslim UniversityAligarh 202002India Department of Precision & Mechanical Engineering and BK21 Eco-Friendly Heat & Cooling Energy Mechanical research Team Gyeongsang National U niversityTongyeong 650160Korea

The mixed spinel ferrite system Mg0.95Mn0.05Fe2-2xTizxO4 （0 ≤x ≤ 0.7） was synthesized by the conventional solid-state reaction technique. The effect of Ti^4＋ doping was studied by using the Moessbauer spectroscopy measurements at room temperature. From the analysis of the Moessbauer spectra, it is observed that s-electron density, electric field gradient （EFG）, quadrupole coupling constant （QCC） and the net hyperfine magnetic fields acting on the Moessbauer nuclei-FeA^3＋ and FeB^3＋ change with the increase of Ti^4＋ doping in Mg0.95Mn0.05Fe2O4. The hyperfine magnetic field decreases with the increase of Ti^4＋ doping.

关键词： spinel ferrite Moessbauer spectroscopy hyperfine magnetic field isomer shift Ti^4+ doping

Mssbauer spectra of MnFe_(2-2x)Al_(2x)O_4(0≤x≤0.4) ferrites

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Journal of Central South University 2010年第6期17卷 1129-1132页

作者： BATOO K M KUMAr S prakash r ALIMUDDIN SONG J I CHUNG H JEONG H KOO B H LEE C G King Abdullah Institute for Nanotechnology King Saud UniversityRiyadh 11451Saudi Arabia School of Nano and Advanced Materials Engineering Changwon National UniversityChangwon 641773Korea Department of Mechanical Engineering Changwon National UniversityChangwon 641773Korea Department of Applied Physics Aligarh Muslim UniversityAligarh 202002India Department of Precision & Mechanical Engineering and BK21 Eco-Friendly Heat & Cooling Energy Mechanical research Team Gyeongsang National U niversityTongyeong 650160Korea

The effect of non-magnetic Al^3＋ ion doping on the magnetic properties of MnFe2-2x Al2xO4 （0 ≤x≤ 0.4） spinel ferrites was studied using Moessbauer spectroscopy measurements at room temperature. From the Moessbauer study, it is observed that the ：esolved hyperfine sextets are due to the distribution of Fe ions on the two sublattices of the spinel ferrites. The value of the isomer shift obtained from the fitting of the Moessbauer spectra indicates that Fe ions are in ＋3 state. A paramagnetic doublet is observed at ：iegree of inversion x=0.4, superimposed on the hyperfine sextets, indicating that the super-exchange interaction A-B decreases due to ：he dilution of sublattice by Al^3＋ ions. The hyperfine magnetic field decreases at both interstitial sites of tetrahedral （A） and 3ctahedral （B） with the increase in Al concentration.

关键词： ferrites hyperfine interactions Moessbauer spectroscopy isomer shift

Impedance spectroscopy study on Mn_(1+x)Fe_(2-2x)Ti_xO_4(0≤x≤0.5) ferrites

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Journal of Central South University 2010年第6期17卷 1133-1138页

作者： KUMAr S BATOO K M prakash r CHOI H K KOO B H SONG J I CHUNG H JEONG H LEE C G School of Nano and Advanced Materials Engineering Changwon National UniversityChangwon 641773Korea King Abdullah Institute for Nanotechnology King Saud UniversityRiyadh 11451Saudi Arabia Department of Mechanical Engineering Changwon National UniversityChangwon 641773Korea Department of Precision & Mechanical Engineering and BK21 Eco-Friendly Heat & Cold Energy Mechanical research Team Gyeongsang National U niversityTongyeong 650160Korea

The complex impedance spectroscopy and surface morphology of Mn1+xFe2-2xTixO4(0≤x≤0.5) system,prepared using a conventional solid state reaction technique,were *** impedance spectroscopy measurements were carried out at room temperature in the frequency range of 42-5 *** electrical processes in the samples were modeled in the form of an equivalent circuit made up of a combination of two parallel rC circuits attributed to grain and grain *** DC conductivity obtained by extrapolation of AC data using impedance spectroscopy and four-probe method increases at 10% doping of Ti *** energy-dispersive X-ray(EDX) pattern confirmed the homogeneous mixing of the Mn,Fe,Ti and O atoms in pure and doped ferrite samples.

关键词： spinel ferrite magnetic properties impedance spectroscopy Ti4+ ions doping

An arrow in the quiver: evaluating the performance of Hyptis suaveolens(L.) Poit. in different light levels

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Ecological Processes 2024年第2期 130-147页

作者： Kanhaiya Shah Gyan prakash Sharma r.Sagar Department of Environmental Studies University of Delhi Department of Botany Banaras Hindu University

Background Hyptis suaveolens（L.） Poit.,native to the American tropics,is a pantropical annual plant and a major invasive species throughout *** was anticipated that the availability of sunlight,coupled with its superior reproductive potential,persistent propagule bank,and dispersal ability,could lead to an increase in the growth and spread of this invader,thus potentially impeding herbaceous growth and diversity in non-native *** its ecological fitness and competitive performance will be useful to manage the spread of *** in natural ecosystems that are facing a wide range of anthropogenic *** The present study is a three-tier *** the first tier,a field study was conducted to assess the patterns of *** abundance and herbaceous species diversity in response to light availability(sun,842-1072μmol m-2s-1and shade 253-341 μmol m-2S-1) in the tropical dry deciduous ecosystems in the Vindhyan highlands,***,the impact of *** abundance on the resident native and non-native species abundance and diversity was also *** the second tier,a randomized common garden experiment was conducted to understand the trait fitness of *** in sun(940 μmol m-2s-1) and shade(300 μmol m-2s-1) *** the third tier,a plant growth chamber experiment with high-light(940 μmol m-2s-1) and low-light(300 μmol m-2s-1)treatments was done to learn how *** partitions its biomass between aboveground and belowground plant *** The field study indicated that the sunlit areas had a higher abundance of *** and a lower diversity of resident herbaceous species than the shaded *** common garden experiment showed that sun-dwelling *** individuals performed better in germinative,vegetative,eco-physiological,and reproductive traits than the shade-dwelling *** growth chamber experiment exhibited that plants grown in high-light environment had greater seed germi

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Experimental Study on Polymer Nanocomposites Based Strain Sensors for Structural Health Monitoring

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Journal of Minerals and Materials Characterization and Engineering 2021年第5期9卷 512-527页

作者： r. Kiran K. r. prakash Poorna Chandra V. ravi Kumar P. B. Asha C. r. prakash rao Department of Mechanical Engineering Global Academy of Technology Bengaluru India Department of Mechanical Engineering NIE Mysuru India

The aim is to develop a mechanically flexible polymer nanocomposite film-based strain sensors that could act towards sustainable structural health monitoring for civil structures. The developed polymer nanocomposite film combinations will be monitored for their structural, electrical and mechanical behaviors and the optimized formulations will be tried for strain sensing applications. The films were cast by using PVA as the base polymer and copper doped silver nitrate as the nanofiller along with the use of glycine as fuel which is a combination of silver and copper nitrate. After preparing the films, they were tested for conductivity under tensile loading using a digital multi meter connected to a UTM. The samples were subjected to XrD, FTIr and SEM for further analysis. The results of the experiments shown I-V characteristics of PVA-CuAgO composites from 5% to 25% CuAgO have been increased tremendously with the incorporation of filler material. For 100 V, the maximum current value obtained for plain PVA is only 7.7E-8 A, whereas CuAgO particles shown 0.0025 A at 5% reinforcements and further increased nearly to 0.025 A for 25% of CuAgO particles into the PVA matrix.

关键词： Polymer Nanocomposites

Fe₃O₄ and Fe Nanoparticles by Chemical reduction of Fe(acac)₃ by Ascorbic Acid: role of Water

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World Journal of Nano Science and Engineering 2016年第1期6卷 20-28页

作者： Ajinkya G. Nene Makoto Takahashi prakash r. Somani Department of Applied Chemistry Chubu University Kasugai Japan Applied Science Innovations Pvt. Ltd. Pune India

Nanoparticles of Fe3O4 and Fe are chemically synthesized by reduction of Fe(acac)3 using ascorbic acid in controlled condition. It was observed that addition of water during the chemical synthesis process yields Fe3O4 nanoparticles, whereas if the reaction is carried out in absence of water yields Fe nanoparticles—which get oxidized upon exposure to air atmosphere. Fe3O4 (15 ± 5 nm) and Fe/iron oxide nanoparticles (7 ± 1 nm) were successfully synthesized in the comparative study reported herewith. Mechanism for formation/synthesis of Fe3O4 and Fe/iron oxide nanoparticles is proposed herewith in which added water acts as an oxygen supplier. Physico-chemical characterization done by SEM, TEM, EDAX, and XPS supports the proposed mechanism.

关键词： Fe3O4 Nanoparticles Fe-Nanoparticles Iron Oxide Chemical reduction Method