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21.
Surabhi Chaubey Rajesh K.Yadav Tae Wu Kim Tara Chand Yadav Abhishek Kumar D.K.Dwivedi B.K.Pandey Atul P.Singh 《中国化学》2021,(3):633-639
Photoredox C-H bond formation can proceed in aerobic environment under solar light and has therefore become attractive.Nowadays,different types of expensive nov... 相似文献
22.
An efficient method for acylation of isoquinolines has been developed using α-ketoacids under metal- and additive-free conditions in water. The protocol involves C(sp2)H functionalization of isoquinolines providing an easy access to C1-benzoylated isoquinolines, which constitute the core structure of a number of biological active compounds and serve as key intermediate in the synthesis of many alkaloids. 相似文献
23.
24.
Bárcena C Sra AK Chaubey GS Khemtong C Liu JP Gao J 《Chemical communications (Cambridge, England)》2008,(19):2224-2226
Mixed spinel hydrophobic ZnxFe1-xO x Fe2O3 (up to x = 0.34) nanoparticles encapsulated in polymeric micelles exhibited increased T2 relaxivity and sensitivity of detection over clinically used Feridex. 相似文献
25.
Shivangi Srivastava Rajesh K. Yadav Poorn Prakash Pande Satyam Singh Surabhi Chaubey Pooja Singh Sarvesh Kumar Gupta Shivani Gupta Tae Wu Kim Dhanesh Tiwary 《Photochemistry and photobiology》2023,99(4):1097-1105
Photocatalytic processes triggered by graphene-based photocatalysts under solar light have sparked interest as a new sort of instrument for solar chemical synthesis. Herein we investigated self-assembled graphene quantum dots (GQDs)/NiSe-NiO composite photocatalyst for organic transformation as well as dye degradation. The synthesized GQDs/NiSe-NiO composite photocatalyst has an excellent suitable band gap, high molar extinction coefficient, low toxicity and chemical/thermal stability. The GQDs/NiSe-NiO composite photocatalyst emerges as a new standard for sulfur oxidation and dye degradation reactions under homemade LED light with high yield. 相似文献
26.
An analysis of self-phase modulation (SPM) induced nonlinearities in a 40 Gbps link with chirped Gaussian pulses of different duty cycles has been reported in this paper. In the present analysis only SPM effect has been considered to control the pulse propagation behavior through the fiber by appropriate selection of pulse width, peak power and channel length to suppress the other channel impairments caused by group velocity dispersion (GVD) and third order dispersion (TOD). The effect of SPM on the Q-factor for the transmission of 40 Gbps chirped pulses with different initial pulse widths and input peak powers has been investigated. It has been observed that a wider pulse having maximum negative chirp can withstand the nonlinear effect of SPM for relatively higher ranges of input peak power. 相似文献
27.
The Bianchi Type-I Universe filled with dark energy from a wet dark fluid has been considered. A new equation of state for
the dark energy component of the Universe has been used. It is modeled on the equation of state p = γ(ρ − ρ*) which can describe a liquid, for example water. The exact solutions to the corresponding field equations are obtained in
quadrature form. The solution for constant deceleration parameter have been studied in detail for both power-law and exponential
forms. The cases γ = 1 and γ = 0 have also been analysed.
相似文献
28.
Manzoor Ahmad Y. P. Chaubey B. K. Sinha 《Annals of the Institute of Statistical Mathematics》1991,43(2):357-367
The problem of estimating the common mean of k independent and univariate inverse Gaussian populations IG(,
i
), i=1,..., k with unknown and unequal 's is considered. The difficulty with the maximum likelihood estimator of is pointed out, and a natural estimator % MathType!MTEF!2!1!+-% feaafeart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXafv3ySLgzGmvETj2BSbqefm0B1jxALjhiov2D% aebbfv3ySLgzGueE0jxyaibaiiYdd9qrFfea0dXdf9vqai-hEir8Ve% ea0de9qq-hbrpepeea0db9q8as0-LqLs-Jirpepeea0-as0Fb9pgea% 0lrP0xe9Fve9Fve9qapdbaqaaeGacaGaaiaabeqaamaabaabcaGcba% acciGaf8hVd0MbaGaaaaa!3D38!\[\tilde \mu \] of along the lines of Graybill and Deal is proposed. Various finite sample properties and some decision-theoretic properties of % MathType!MTEF!2!1!+-% feaafeart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXafv3ySLgzGmvETj2BSbqefm0B1jxALjhiov2D% aebbfv3ySLgzGueE0jxyaibaiiYdd9qrFfea0dXdf9vqai-hEir8Ve% ea0de9qq-hbrpepeea0db9q8as0-LqLs-Jirpepeea0-as0Fb9pgea% 0lrP0xe9Fve9Fve9qapdbaqaaeGacaGaaiaabeqaamaabaabcaGcba% acciGaf8hVd0MbaGaaaaa!3D38!\[\tilde \mu \] are discussed.This research was partially supported by research grants #A3661 and #A3450 from NSERC of Canada. 相似文献
29.
Asha Chaubey Manju Gerard V. S. Singh B. D. Malhotra 《Applied biochemistry and biotechnology》2001,96(1-3):303-311
Tetraethylorthosilicate (TEOS)-derived sol-gel films were utilized for the immobilization of lactate dehydrogenase (LDH) by
physical adsorption and sol-gel/LDH/sol-gel sandwich configuration. An attempt was made to ascertain the optimum pH and temperature
for the immobilized LDH. It was shown that TEOS-derived sol-gel films containing physically adsorbed LDH exhibited linearity
from 0.5 to 4 mM, whereas those containing LDH in sandwich configuration showed linearity from 0.5 to 3 mM
l-lactate. These sol-gel films, immobilized with LDH, were found to be stable for about 4 weeks at 4–10°C. 相似文献
30.
We have shown that, within the context of scalar-tensor theories, the anisotropic Bianchi-type cosmological models evolve
towards de Sitter Universe. A similar result holds in the case of cosmology in Lyra manifold. Thus the analogue of cosmic
no-hair theorem of Wald [1] hold in both the cases. In fact, during inflation there is no difference between scalar-tensor
theories, Lyra’s manifold and general relativity (GR). 相似文献