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21.
Silicon - Silicon and Polysilicon are used as piezoresistive materials in MEMS (Micro Electromechanical system) piezoresistive pressure sensors because of its reproducibility and enhanced... 相似文献
22.
Anita R Jindal Alistair S Grandison Geoffrey Campbell-Platt 《Journal of the science of food and agriculture》1993,61(4):449-456
Chhana whey contains less protein than Cheddar cheese whey, acid casein and cottage cheese whey, and the protein composition is quite different. Electrophoretic methods demonstrated that most of the proteins in chhana whey were denatured, and there was considerable variation in the protein composition between samples of chhana whey and paneer whey obtained from different sources. The effect of storage temperature and time (up to 10 h at 40°C, 50°C, 60°C, 70°C and 80°C) on the quality of chhana whey was investigated. There were no significant changes in the pH and titratable acidity in any of these cases. Electrophoretic separation showed no qualitative changes in the protein composition pattern of chhana whey after up to 10 h of storage at 70°C. 相似文献
23.
Pressure gradients and the corresponding mass flow rates of five different non-Newtonian fluid foods: 1% solutions of sodium alginate and CMC, 1.5% CMC solution, two different tomato ketchups, oyster sauce, in four different diameter stainless steel tubes ranging from 7.51 to 16.34 mm i.d. were recorded using a tube viscometer capable of operating in both transient and continuous flow modes. The flow was confined to the laminar flow regime and appreciable slippage occurred in all cases. Power law parameters for the tube flow obtained from the plots of wall shear stress versus apparent wall shear rate are presented for various time-independent fluids in different diameter tubes in original and slip-corrected forms. Such experimental data should prove useful in developing an understanding of flow characterization of non-Newtonian fluids. 相似文献
24.
S. V. Babu A. Jindal Y. Li 《JOM Journal of the Minerals, Metals and Materials Society》2001,53(6):50-52
As device dimensions continue to shrink, multilevel (>8) interconnects are required to efficiently implement complex logic
device designs in a single silicon chip. When the number of metal interconnect levels increases, the available depth-of-focus
budget of lithographic tools imposes stringent planarity requirements that can only be met currently by chemical-mechanical
planarization (CMP). Improved speed and performance are extracted from such devices by switching to copper from Al/Cu as the
interconnect metal and to lower dielectric constant inner layers. Use of copper also requires the simultaneous introduction
of diffusion-barrier/adhesion-promotion layers of tantalum or TaN. This paper reviews some of the recent advances in the fundamental
understanding of the interplay between the mechanical and chemical components of the material-removal process during CMP of
copper and tantalum films. The emphasis will be on the role of different process variables in slurries containing silica or
alumina abrasives in hydrogen peroxide/glycine solutions.
For more information, contact S.V. Babu, Clarkson University, Center for Advanced Materials Processing & Department of Chemical
Engineering, Clarkson University Box 5705, Potsdam, New York 13699-5705; (315) 268-3999; fax (315) 268-6654; e-mail babu@clarkson.edu. 相似文献
25.
MR Bochan RA Sidner R Shah OW Cummings M Goheen RM Jindal 《Canadian Metallurgical Quarterly》1998,30(2):453-454
26.
Yateen Shah S. Khanna K. C. Jindal V. S. Dighe 《Drug development and industrial pharmacy》1992,18(14):1589-1596
A liquid chromatographic procedure for the analysis of Rifampicin (RIF) and Isoniazid (INH) in pharmaceutical dosage forms utilizing reverse phase chromatography was developed. Isolation of analytes was carried out under isocratic conditions with a octadecylsilane column and an aqueous mobile phase containing Methanol (75%) and 0.02 M Disodium Hydrogen Orthophosphate (25%) with pH 4.5 adjusted with orthophosphoric acid. The detection was done at 254 nm.
The method is unique in analysing Rifampicin precisely in combination with Isoniazid particularly in liquid formulation. The method is specific and can distinctly isolate the degradation product in suspension. 相似文献
The method is unique in analysing Rifampicin precisely in combination with Isoniazid particularly in liquid formulation. The method is specific and can distinctly isolate the degradation product in suspension. 相似文献
27.
Cyclins are essential proteins in cell cycle control, and their deranged expression has been reported to be associated with malignant transformation. Involvement of cyclins in the development of endometrioid carcinomas of the endometrium was studied immunohistochemically using antibodies against both cyclin A and tumor suppressor gene product p53, and their expression was compared with that of Ki-67 antigen. Sixty-two cases of endometrial endometrioid carcinoma and 20 cases of normal endometrium (10 proliferative and 10 secretory phase) were examined. Of the 62 endometrioid carcinomas, atrophic endometrium and hyperplasia were found adjacent to the cancers in 30 and 19 cases respectively. Cyclin A was expressed in < 1% of the glandular cells of normal endometrium in the proliferative phase and in hyperplasia, but was negligible in normal secretory phase and atrophic endometrium. p53 was almost always negative in normal endometrium and hyperplasia. Of the 62 endometrioid carcinomas, 12 tumors (19.4%) overexpressed cyclin A and 21 tumors (33.8%) overexpressed p53 (positive cells > 1%). Cyclin A and p53 were more frequently expressed in poorly differentiated tumors than in well differentiated tumors (cyclin A, p = 0.002; p53, p = 0.016). In addition, cyclin A-positive cells were topographically related to those cells positive for p53 as well as Ki-67. In conclusion, the abnormal expression of cyclin A and p53 is associated with high-grade endometrial endometrioid carcinomas. 相似文献
28.
We present here an improvement of the existing modified Airy function (MAF) method. The results of our study show that the improvement gives extremely accurate propagation constants and also the modal fields for planar waveguides with arbitrary index profile 相似文献
29.
Exchange of data in the form of text and image on internet is in fast progression and it is spawning new compression and encryption algorithms for bandwidth and security respectively. We have proposed a new kind of joint algorithm using discrete fractional transforms for compression–encryption of image. In this algorithm, the discrete fractional Fourier transform which is discrete version of fractional Fourier transform, is used to compress the images with variation of its parameter ‘α’ (order of transform). The compressed image is encrypted using discrete fractional cosine transform to provide security. The advantage of this method is its feasible implementation in practice, superior, robustness, security and sensitivity of keys, which has a good prospect and practicability in information security field. Results of computer simulations are presented to verify the validity of the proposed method such as mean square error (MSE) and peak signal to noise ratio between the original image and decrypted image. Sensitivity for right decryption key is proved with respect to MSE. 相似文献
30.
Capacity and optimal power allocation for fading broadcast channels with minimum rates 总被引:4,自引:0,他引:4
Jindal N. Goldsmith A. 《IEEE transactions on information theory / Professional Technical Group on Information Theory》2003,49(11):2895-2909
We derive the capacity region and optimal power allocation scheme for a slowly fading broadcast channel in which minimum rates must be maintained for each user in all fading states, assuming perfect channel state information at the transmitter and at all receivers. We show that the minimum-rate capacity region can be written in terms of the ergodic capacity region of a broadcast channel with an effective noise determined by the minimum rate requirements. This allows us to characterize the optimal power allocation schemes for minimum-rate capacity in terms of the optimal power allocations schemes that maximize ergodic capacity of the broadcast channel with effective noise. Numerical results are provided for different fading broadcast channel models. 相似文献