http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Vertical Lift of Vector Fields to the Frame Bundle
Mishra,A K,Singh,R N 한국수학교육학회 1990 수학교육 Vol.29 No.1
Let M be a differentiable manifold, TM its tangent bundle and FM its frame bundle. The theory of complete lifts and Horizontal lifts to FM of vector fields on M ahs been studied by many authors. In this paper, vertical lifts of functions vector fields and 1-forms on M to FM are studied.
N. Ballav,최형진,S.B. Mishra,A. Maity 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
Fe3O4 coated glycine doped polypyrrolemagnetic nanocomposite (Fe3O4@gly-PPy NC) was prepared viacoating of suspended Fe3O4 nanoparticles with gly-PPy. FE-SEM and HR-TEM images indicated thatFe3O4 nanoparticles were encapsulated by precipitating gly-PPy moieties. Chromium(VI) adsorptionfollowed a Langmuir isothermwith maximum capacity of 238–303 mg/g for a temperature range of 25–45 ℃ at pH 2. The adsorption process was governed by the ionic interaction and the reduction of Cr(VI) toCr(III) by the PPy moiety. Results showed that NCs are effective adsorbents for the removal of Cr(VI) fromwastewater and can be separated by external magnetic field from the reactor.
Ballav, N.,Choi, H.J.,Mishra, S.B.,Maity, A. Korean Society of Industrial and Engineering Chemi 2014 Journal of industrial and engineering chemistry Vol.20 No.6
Fe<SUB>3</SUB>O<SUB>4</SUB> coated glycine doped polypyrrole magnetic nanocomposite (Fe<SUB>3</SUB>O<SUB>4</SUB>χly-PPy NC) was prepared via coating of suspended Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles with gly-PPy. FE-SEM and HR-TEM images indicated that Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles were encapsulated by precipitating gly-PPy moieties. Chromium(VI) adsorption followed a Langmuir isotherm with maximum capacity of 238-303mg/g for a temperature range of 25-45<SUP>o</SUP>C at pH 2. The adsorption process was governed by the ionic interaction and the reduction of Cr(VI) to Cr(III) by the PPy moiety. Results showed that NCs are effective adsorbents for the removal of Cr(VI) from wastewater and can be separated by external magnetic field from the reactor.
Sahoo, A.,Mishra, S.C.,Pathak, N.N. Asian Australasian Association of Animal Productio 2002 Animal Bioscience Vol.15 No.8
Sixteen crossbred (Bos indicus${\times}$Bos taurus) calves were randomly distributed in two groups (NP and LP) of eight calves each to study the effect of restricted (75%) protein supply on growth and immuno-biochemical response as an indicator of production and health of under-nourished animals during 3 to 9 months of age. The normal requirement of protein was provided to group NP and a less of 25% to group LP through calculated amount of concentrate and roughage in their daily ration. Assessment was made for weekly change in live weight, periodic alteration in blood metabolites and immunological status at six months of age in calves. An initial (during 3 to 6 months of age) depression (p<0.05) in growth was seen in low protein fed group (LP) compared to NP, which became non-significant in the later period of life (6 to 9 months of age). There was no significant effect on haemoglobin, total protein, albumin and globulin concentration except that of urea, which was decreased significantly (p<0.05) in animals fed on low protein diet ($19.83{\pm}1.25$ vs $25.93{\pm}1.29mg/dl$). The treatment effect that was seen in different periods of life was not uniform for other parameters except for urea, which showed a regular depression in LP compared to NP. The assessment of immunological status by indirect haemagglutination (IHA) test against Pasteurella multocida (P52 strain) was considerably (p<0.05) reduced in animals on LP ration compared to those on NP. It is thus argued that with poor nutrition (low protein) and state of compromised immunological response the production and health of the animals will be adversely affected.
Ballav, N.,Choi, H.J.,Mishra, S.B.,Maity, A. Elsevier 2014 Applied clay science Vol.102 No.-
A polypyrrole-coated halloysite nanotube nanocomposite (PPy-HNTs NC) was prepared via in situ polymerization of pyrrole (Py) in the dispersion of HNTs and assessed for the removal of toxic Cr(VI) from aqueous solutions. ATR-FTIR and XRD results confirmed the formation of the nanocomposite. The FE-SEM and TEM images revealed the coating of PPy in the halloysite matrix and the surface morphology of the PPy-HNTs NC. Batch adsorption study showed that the adsorption process was very fast and kinetic data well fitted with pseudo-second-order kinetic model. Adsorption isotherms followed the Langmuir isotherm model and the maximum adsorption capacity was found to be 149.25mg/g at pH2.0 at 25<SUP>o</SUP>C. The adsorption process was spontaneous and endothermic in nature. XPS study confirmed the adsorption of Cr(VI) onto the NC where some part of Cr(VI) reduced to Cr(III) by electron-rich PPy moiety. The desorption study suggested that the nanocomposite (NC) can be reused three times without loss of its original removal efficiency. Tests on contaminated groundwater and chrome mine water indicated the potential applicability of the adsorbents for the removal of Cr(VI) for actual field application.
A green approach for the reduction of graphene oxide by wild carrot root
Kuila, T.,Bose, S.,Khanra, P.,Mishra, A.K.,Kim, N.H.,Lee, J.H. Pergamon Press ; Elsevier Science Ltd 2012 Carbon Vol.50 No.3
A green approach for the reduction of graphene oxide (GO) using wild carrot root is reported in this work. It avoids the use of toxic and environmentally harmful reducing agents commonly used in the chemical reduction of GO to obtain graphene. The endophytic microorganisms present in the carrot root, reduces exfoliated GO to graphene at room temperature in an aqueous medium. Transmission electron microscopy and atomic force microscopy images provide clear evidence for the formation of few layer graphene. Characterization of the resulting carrot reduced GO by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy shows partial reduction of GO to graphene. Raman spectroscopy data also indicates the partial removal of oxygen-containing functional groups from the surface of GO and formation of graphene with defects.
M. H. Jeon,A.K. Mishra,S-K. Kang,K.N. Kim,I.J. Kim,S.B. Lee,T.H. Sin,염근영 한국물리학회 2013 Current Applied Physics Vol.13 No.8
60 MHz pulsed radio frequency (rf) source power and 2 MHz continuous wave rf bias power, were used for SiO2 etching masked with an amorphous carbon layer (ACL) in an Ar/C4F8/O2 gas mixture, and the effects of the frequency and duty ratio of the 60 MHz pulse rf power on the SiO2 etch characteristics were investigated. With decreasing duty ratio of the 60 MHz pulse rf power, not only the etch rate of SiO2 but also the etch rate of ACL was decreased, however, the etch selectivity of SiO2 over ACL was improved with decreasing the duty ratio. On the other hand, when the pulse frequency was varied at a constant duty ratio, no significant change in the etch rate and etch selectivity of both materials could be observed. The variation of the etch characteristics was believed to be related to the change in the gas dissociation characteristics caused by the change in the average electron temperature for different pulsing conditions. The improvement in the etch selectivity with the decrease of duty ratio, therefore, was related to the decreased gas dissociation of C4F8 by the decrease of average electron temperature and, which resulted in a change in composition of the fluorocarbon polymer on the etched materials surface from CeC rich to CF2 rich. With decreasing the duty ratio, not only the etch selectivity but also the improvement in the SiO2 etch profile could be observed.