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排序方式: 共有183条查询结果,搜索用时 20 毫秒
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Shalini Gaur Rudra Sunita Singh Harish H. Haritha Bollinedi Kamalesh Narain Singh Lata Nain Surender Singh Om Prakash Awasthi 《International Journal of Food Science & Technology》2022,57(7):4566-4574
Grewia is a tropical berry rich in anthocyanins and antioxidants but highly perishable in nature. In this study, desirable composite blend of overripe Grewia (Phalsa) berries and cantaloupe was sought for conversion to acetic acid. Composition of raw macerate, and the alcoholic and acetic ferments was analysed for sugars, alcohol and acetic acid. The primary alcohol yield varied significantly (5.75–99.44%) with blend composition. Vinegar from select blend attained 4.98% acidity with 138.57 mg mL−1 of phenols and high anthocyanins retention (74.77%). Gompertz model was used to fit the growth curves of S. cerevisiae and A. aceti (R2> 0.92) during fermentation. Presence of ethyl acetate, iso-pentyl alcohols explained pleasant sweet fruity aroma of resulting vinegar. Thus, high quality functional red fruit vinegar can be obtained to prevent spoilage and utilise the functional potential of this delicate and nutritious berry. 相似文献
3.
Gupta Vidyadhar Awasthi Himanshi Kumar Nitish Pandey Amit Kumar Gupta Abhinav 《SILICON》2022,14(6):2989-2997
Silicon - This present article interprets the analytical models of central channel potential, the threshold voltage, and subthreshold current for Graded-Doped Junctionless-Gate-All-Around... 相似文献
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Maitreyi Upadhyay Suneet K. Awasthi Laxmi Shiveshwari S. N. Shukla S. P. Ojha 《Journal of Superconductivity and Novel Magnetism》2015,28(7):1937-1942
By studying temperature-dependent dispersion characteristics and group velocity of 1D ternary photonic crystal (TPC) composed of dielectric-superconductor-dielectric materials, a thermally tunable band-stop filter which is capable of stopping unique wavelength channels without causing any interference amongst equally spaced wavelength channels of full width at half maximum of 1 nm each as per the requirement of wavelength division multiplexing standards adopted by the International Telecommunication Union specifying channel spacing in terms of frequency (wavelength) is suggested. The proposed structure can efficiently work as a two-channel wavelength selective switch for wavelength division multiplexing (WDM)-based all-optical networks. This study also gives theoretical insight to design some new kind of optical memories and tunable buffers which holds data temporary and have potential applications in modern communication systems. 相似文献
6.
Viscous Potential Flow Analysis of Kelvin–Helmholtz Instability of a Cylindrical Flow with Heat and Mass Transfer 下载免费PDF全文
A linear analysis of Kelvin–Helmholtz instability of a cylindrical interface has been carried out when there is heat and mass transfer across the interface, using viscous potential flow theory. Both fluids are considered as incompressible, viscous, and thermally conducting with different kinematic viscosities. Both axisymmetric as well as asymmetric disturbances are considered. Stability criterion is given by a critical value of relative velocity and stability is discussed theoretically as well as numerically. Various graphs with respect to physical parameters such as wave number, viscosity ratio, heat transfer coefficients, Reynolds number, etc., have been drawn and the effect of various parameters have been described. A comparison with the linear stability analysis of inviscid fluids (Lee [10]) has been made and it is observed that viscosity has a stabilizing effect on the stability of the system. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res, 43(6): 489–503, 2014; Published online 3 October 2013 in Wiley Online Library ( wileyonlinelibrary.com/journal/htj ). DOI 10.1002/htj.21092 相似文献
7.
Vishnu Awasthi Sushil K. Pandey Saurabh K. Pandey Shruti Verma Mukul Gupta Shaibal Mukherjee 《Journal of Materials Science: Materials in Electronics》2014,25(7):3069-3076
The growth of CIGS thin films on soda-lime glass substrates at different substrate temperatures by dual ion beam sputtering system in a single-step route from a single quaternary sputtering target with the composition of Cu (In0.70 Ga0.30) Se2 was reported. The effects of the substrate temperature on structural, optical, morphological and electrical properties of CIGS films were investigated. Stoichiometry of one such film was investigated by X-ray photoelectron spectroscopy. All CIGS films had demonstrated a strong (112) orientation located at 2θ ~26.70o, which indicated the chalcopyrite structure of films. The value of full-width at half-maximum of (112) peak was reduced from 0.58° to 0.19° and crystallite size was enlarged from 14.98 to 43.05 nm as growth temperature was increased from 100 to 400 °C. However, atomic force microscope results showed a smooth and uniform surface at lower growth temperature and the surface roughness was observed to increase with increasing growth temperature. Hall measurements exhibited the minimum film resistivity of 0.09 Ω cm with a hole concentration of 2.42 × 1018 cm?3 and mobility of 28.60 cm2 V?1 s?1 for CIGS film grown at 100 °C. Film absorption coefficient was found to enhance nominally from 1 × 105 to 2.3 × 105 cm?1 with increasing growth temperature from 100 to 400 °C. 相似文献
8.
Cyclic voltammetry was used to investigate the electrochemical behavior of citric acid (CA) and quinine hydrochloride (QH) at a polypyrrole-pentacyanoferrate/Platinum (PPY–PCNFe/Pt) electrode in aqueous medium. The analytical plots obtained were found to be linear in the concentration range between 1.0 and 9.0 mM for both the analyte solutions. The detection limits (3δ) were found to be 1.17 × 10?4 M and 1.08 × 10?5 M for CA and QH analyte solutions, respectively. It was further observed that the diffusion of ionic species into and out of the polymeric film made the PPY–PCNFe/Pt electrode highly electroactive thereby enabling it to efficiently detect the analyte solutions having concentration as low as 1 mM. 相似文献
9.
Kamlendra Awasthi M. StammVolker Abetz Y.K. Vijay 《International Journal of Hydrogen Energy》2011,36(15):9374-9381
In the present case, Polyethylene terephthalate (PET) membranes of thickness 25 μm were irradiated by 100 MeV Cl9+ ion beam with ion fluence of 107 ions/cm2. These membranes were etched in 6N NaOH at 60 °C at different etching times to generate pores. The permeabilities of nitrogen, oxygen, methane, carbon dioxide as well as hydrogen were measured for etched membranes at various etching times. The permeability of gases was found to increase with etching time and a rapid increase was noticed after a critical etching time when the etched tracks meet at their vertexes. The selectivity of hydrogen gas over other gases was also observed. 相似文献
10.
Kenneth H. Sandhage Seyed M. Allameh Pragati Kumar Hans J. Schmutzler David Viers Xiao-Dong Zhang 《Materials and Manufacturing Processes》2000,15(1):1-28
In most of the published work on the high-temperature oxidation of bulk metals, the resulting oxides are treated as undesired corrosion products. The opposite paradigm is discussed in this paper: bulk precursors containing alkaline earth metals (AE = Mg, Ca, Sr, Ba) are completely oxidized to produce electrical or refractory ceramics. Relatively dense AE-metal-bearing green bodies can be fabricated by either solid-state deformation processing or liquid metal infiltration processing. Rapid oxidation of the solid AE metals and reaction with other oxides in the green bodies can yield desired compounds. Unlike other oxides, AE oxides possess smaller molar volumes than the corresponding metals. Hence, by adjusting the amounts of AE and non-AE components in a precursor, an all-ceramic body with a shape and volume identical to the precursor can be produced (Volume Identical Metal Oxidation or VIMOX). The syntheses of shaped electronic titanates and cerates, and refractory aluminates and aluminosilicates, are discussed. 相似文献