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RISS 인기검색어
- 검색키워드
- 저자 : Suryavanshi, S.S. (검색결과 6 건)
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Atul Arya,Suresh Kumar,Rajinder Paul,Amrita Suryavanshi,Dolly Kain,Rudra Narayan Sahoo 경희대학교 융합한의과학연구소 2023 Oriental Pharmacy and Experimental Medicine Vol.23 No.1
The ethnopharmacological investigation was done to study the traditional usage of indigenous medicinal plants of Palampur, Himachal Pradesh. Therefore, an extensive ethnopharmacological survey was conducted to document the traditional knowledge of ethnomedicinal plants. Direct interviews of 77 informants were conducted with the help of a questionnaire. Three quantitative factors (use value, factor informant consensus and fidelity level) were used for the analysis of generated data. A total of 102 species, belonging to 90 genera and 30 families were identified and collected with the help of traditional healers and local informants from different locations of the study area. Total 19 medicinal plants species were reported for new or less known ethnomedicinal uses. Also, 3 threatened wild plants species were collected from the study area. The maximum number of species belongs to the family Lamiaceae (7), Fabaceae (7), Asteraceae (6), Moraceae (4 species), Apocyanaceae (4 species) and Euphorbiaceae (3 species). Different plant parts were used by local informants such as leaves, galls, fruits, seeds, latex, stem, root, flowers, bark, and rhizomes. It was also observed that maximum numbers of plant species were used to cure gastro-intestinal disorders (48 species), skin disorders (34 species) and respiratory disorders (25 species). Ethnopharmacological data depict that medicinal plants were extensively used by local people to cure gastrointestinal, dermatological disorders and skeletomuscular disorders. Traditionally used medicinal plants have enormous potential to provide the raw material for the discovery of new bioactive compounds and drugs.
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Growth of ZnO nanodisk, nanospindles and nanoflowers for gas sensor: pH dependency
RAJENDRA CHARANDEO PAWAR,J.S. Shaikh,S. S. Suryavanshi,P.S. Patil 한국물리학회 2012 Current Applied Physics Vol.12 No.3
Suitable morphology for fast electron transportation is a crucial requirement for the fabrication of gas sensor application. Highly oriented and well defined zinc oxide (ZnO) nano/micro-scale structures are grown on the glass substrates using aqueous chemical route. The grown nanostructures have been characterized by X-ray diffraction pattern (XRD), scanning electron microscope (SEM) and optical absorption techniques. The SEM micrographs revealed the formation of disk, rod, spindle and flower-like morphologies at different pH values ranging from 5 to 10. The grown nanostructures were employed for acetone gas-sensing measurement. It is observed that the sensors based on nanoflowers showed higher response (95%) for acetone gas at 325 ℃. The high acetone gas sensitivity of ZnO nanoflowers can be attributed to the surface morphology. Moreover, nanoflower-like structure exhibits the fast response and recovery.
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J.Y. Patil,M.S. Khandekar,I.S. Mulla,S. S. Suryavanshi 한국물리학회 2012 Current Applied Physics Vol.12 No.1
We report synthesis of Spinel type magnesium ferrite (MgFe2O4) material by a simple, inexpensive combustion method with glycine as a fuel and their application as a gas sensor for reducing gases (LPG,Acetone, Ethanol, Ammonia). The dependence of reducing gas sensing properties on the structural and surface morphological properties has been studied as an effect of sintering temperatures. The structural and surface morphological properties were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The MgFe2O4 were highly oriented along (311) with the spinel type crystal structure. The SEM observation reveals that porous morphology decreases due to the grain growth as sintering temperature increases. The mechanism of reducing gas sensing by the MgFe2O4pellets is explained on the basis of adsorbed oxygen on the sensor surface. The selectivity and maximum response of 71% to 2000 ppm of LPG was observed at 698 K with the (MgFe2O4) material sintered at 1173 K.
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Gas sensing performance of the spray deposited Cd-ZnO thin films
Tarwal, N.L.,Patil, A.R.,Harale, N.S.,Rajgure, A.V.,Suryavanshi, S.S.,Bae, W.R.,Patil, P.S.,Kim, J.H.,Jang, J.H. Elsevier Sequoia 2014 JOURNAL OF ALLOYS AND COMPOUNDS Vol.598 No.-
<P>A simple and cost-effective spray pyrolysis technique was employed to deposit undoped and cadmium doped zinc oxide (Cd-ZnO) thin films onto the glass substrates and the deposited films were characterized for their structural, morphological and optical properties. The doping concentration was varied from 1 to 5 at.%. All the films showed the preferred orientation along (002) plane. However, the (002) plane was shifted towards the lower 2 theta values after Cd doping. The lattice parameters and texture coefficients were obtained by analyzing the XRD patterns. The band gap energies of the films were decreased with increase in Cd concentration. Moreover, the gas sensing properties of the Cd-ZnO films were investigated towards the reducing gases such as Liquefied petroleum gas (LPG), acetone, ethanol and ammonia. The cadmium dopant plays a vital role in fine tuning the physico-chemical properties and consequently gas sensitivity of the ZnO thin films. The sample with 2 at.% Cd doped ZnO (CZO2) showed the maximum gas sensitivity (87%) towards acetone at 325 degrees C with faster response and recovery time periods of 6 s and 23 s, respectively. (C) 2014 Elsevier B. V. All rights reserved.</P>
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R. C. Kambale,Y. A. Park,허남정,K. Y. Rajpure,S. S. Suryavanshi 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.6
Magnetostrictive-piezoelectric heterostructures show the strong magnetoelectric (ME) interactions that are mediated by mechanical forces. Magnetoelectric particulate composite structures of (0.1, 0.2, 0.3) mol% CoMn<SUB>0.2</SUB>Fe_(1.8)O_4– (0.9, 0.8, 0.7) mol% BaZr_(0.08)Ti_(0.92)O_3 has been prepared by a solid-state reaction. X-ray diffractometry patterns show variation in the amount of intensity of the spinel phase with ferrite content. The effect of constituent phase variation on the B–H hysteresis behavior and the dielectric properties was examined. The dielectric constant shows the usual dielectric dispersion behavior with increasing frequency which is due to the Maxwell–Wagner type surface interfacial polarization. The dynamic transverse ME coefficient α_(ME) of the composites has been measured at 850 Hz. The strong dependence of ME response on the content of ferrite phase was observed. The paper presents the investigations on ME composites for their dielectric, magnetic and ME properties. The results are discussed with proper scientific reasons along with the applicability of the materials in ME sensing devices.
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