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81.
K. Chaturvedi Bipin Singh Koranga Vinod Kumar 《International Journal of Theoretical Physics》2012,51(2):622-628
Implication of the neutrino oscillation search for the neutrino mass square difference and mixing are discussed. We have considered
the effective Majorana mass m
ee
, related for ββ
0ν
decay. We find limits for neutrino mass eigen value m
i
in the different neutrino mass spectrum,which explain the different neutrino data. 相似文献
82.
We investigated a far-field superlens operating at mid-infrared wavelength that allows resolving subwavelength features in
the far-field. By utilizing evanescent enhancement provided by surface plasmon excitation of silver nanorods and Moiré effect,
we numerically demonstrated that subwavelength information of an object can be converted to propagating information. This
information can then be captured by conventional optical components. A simple image reconstruction algorithm can restore the
subwavelength object. A sub-diffraction-limited resolution of 2.5 μm at 6-μm wavelength is demonstrated. 相似文献
83.
In the present study, the expression of first pressure derivative of bulk modulus B′?earlier derived by Goyal and Gupta EoS [7] is corrected and the validity of the EoS is then verified in extreme compression region. The expressions of second and third order pressure derivative of bulk modulus are obtained. The values of B′, B2B? to BB″,?Grunesien parameters?λ∞,?γ∞,?q∞ at infinite pressure (P?→?∞)?are calculated using the identities [11–13] to check the validity of the equation in extreme compression region. The Goyal and Gupta EoS is then used to study the volume compression in diatomic solids, LiH and MgO. The values of pressure, bulk modulus and its first order pressure derivative at different compressions are calculated and compared with the results obtained from Hama–Suito EoS. The results justify the validity of the present EoS in high pressure region and the results for diatomic solids are also found in good consistency with the compared results. 相似文献
84.
We give two explicit constructions for the carrier space for the Schwinger representation of the group Sn. While the first relies on a class of functions consisting of monomials in antisymmetric variables, the second is based on the Fock space associated with the Greenberg algebra. 相似文献
85.
A dissipative spin system, which is also considered to be a model for optical fluorescence, is investigated from the viewpoint of Brownian motion of spins. The most probable path and the fluctuations are determined by the quantum mechanical version of the system size expansion method. For the most probable path, the flow lines as well as the time evolutions are obtained exactly. This system exhibits a sort of nonequilibrium phase transition as the strength of an external field exceeds the dissipation. The fluctuations show unusual behaviour associated with the Volterra-like oscillations above threshold. 相似文献
86.
P. N. Chaturvedi 《Colloid and polymer science》1994,272(4):416-421
Non-isothermal melt crystallization of trans-1,4-polyisoprene (TPIP) has been studied with the help of differential scanning calorimetry (DSC) and wide-angle x-ray diffraction. Self-seeding has been used for the controlled growth of polymorphs. Thus, self-seeding below 55° and below 71°C has led to the exclusive crystallization of and polymorphs, respectively, upon non-isothermal cooling of the polymer melt. These temperatures may vary slightly with the previous thermal history and molecular characteristics of the original sample. It has been interpreted that during cooling the rate of growth (by secondary nucleation) of seeds of either polymorph remains much faster than the rate of primary nucleation of the other polymorph whose seeds are not present in the melt. As a result, the crystallizing melt becomes occupied by the spherulites of the seeded polymorph well before the other polymorph can nucleate. 相似文献
87.
Sulfadimethoxin salicylaldimine (SUDMSA) has been found to be a wide spectrum precipitant of a number of metal ions. The chelates are granular, stable, and quantitatively formed. SUDMSA has been utilized for the gravimetric determination of barium in the presence of Ca(II), Sr(II), Fe(III), As(III), Sb(III), Cr(III), Ag(I), Cu(II), Ni(II), Co(II), Mn(II), Cd(II), Zn(II), Hg(II), Pd(II), Mg(II), Tl(I), ZrO(II), Sn(IV). The St. of the chelate was confirmed by elemental analysis and IR data. 相似文献
88.
Nag Purnima Chaturvedi Alok Tripathi Umesh N. Bohra Rakesh Srivastava Ghanshyam Mehrotra Ram C. Wang H.Q. 《Transition Metal Chemistry》2002,27(6):651-655
Silver(I) dialkyl/alkylene dithiophosphates of the types [Ag{S2P(OR)2}] and [Ag{S2P(OGO)}] (where R = –Pr
n
; G = –CMe2CH2CHMe–, –CH2CMe2CH2–, –CMe2CMe2– or –CH2CH2CHMe–) have been prepared by treating an aqueous solution of AgNO3 with ammonia salts of the respective dithiophosphoric acid. The derivatives form 1:1 adducts readily with 2,2-bipyridine or Ph3P in CH2Cl2 solution. These novel complexes have been characterized by elemental analyses, molecular weight measurements and spectral (i.r., 1H- and 31P-n.m.r.) studies. The crystal structure of [Ag{S2POCH2CMe2CH2O · PPh3]2 · 2H2O exhibits an unsymmetrical attachment of the silver(I) to the ligand moiety. 相似文献
89.
M S Hegde A Srinivasan K Jagannathan G C Chaturvedi 《Journal of Chemical Sciences》1980,89(2):145-151
Surface oxidation of Co has been investigated at different temperatures in the 300–600 K range at oxygen exposures upto 106 L by XPES and AES techniques. In the XPES, both the valence band and core level bands have been employed to monitor the oxidation
while in the AES, metal Auger intensity ratios as well as O(KLL)/Co(L23M45M45) ratios have been examined. Only CoO is formed on the surface at high oxygen exposures at and above 500 K.
Communication No. 62 from the Solid State and Structural Chemistry Unit. 相似文献
90.
Prem Pandey Supriya Chaturvedi Rutuja Gumathannavar Dr. Mandar M. Shirolkar Dr. Vijay Kanuru Prof. Dr. Atul Kulkarni Dr. Sang Hyun Moh 《ChemistryOpen》2023,12(1):e202200200
We report a facile room temperature telescoping synthesis of a nanocurcumin complex with 17.5-fold permeation enhancement as determined by comparative in vitro permeation study with raw curcumin. The permeation results were further validated with in silico drug absorption prediction using ADMET predictors. 相似文献