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排序方式: 共有131条查询结果,搜索用时 46 毫秒
41.
P. Srirama Murti M. V. Krishnaiah 《Journal of Thermal Analysis and Calorimetry》1991,37(11-12):2643-2648
The thermal diffusivity and thermal conductivity of the zirconate, cerate and uranate of barium were investigated by employing the laser flash technique. The variation in the thermal resistivity as a function of temperature was examined and the heat transport behaviour of these materials is discussed. 相似文献
42.
The spectral distribution of a central multivariate F matrix is shown to tend to a limit distribution in probability under certain conditions as the number of variables and the degrees of freedom tend to infinity. 相似文献
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In this paper, the authors obtained asymptotic expressions for the joint distributions of certain functions of the eigenvalues of the Wishart matrix, correlation matrix, MANOVA matrix and canonical correlation matrix when the population roots have multiplicity. 相似文献
44.
Vudagandla Sreenivasulu Mullangi Ramesh Inamadugu Jaswanth Kumar Ravi Vasu Babu Nageswara Rao Pilli Abburi Krishnaiah 《Biomedical chromatography : BMC》2013,27(2):179-185
A simple, sensitive and rapid LC‐MS/MS‐ESI method has been developed and validated for simultaneous quantification of the carisoprodol and aspirin in human plasma. Carisoprodol was detected in positive ion mode, whereas aspirin was detected in negative ion mode. Carbamazepine and furosemide were used as internal standards (IS) for quantification of carisoprodol and aspirin, respectively. The extraction procedure involves a liquid–liquid extraction method with ter‐butyl methyl ether. Chromatographic separation was achieved on a Zorbax XDB‐Phenyl (4.6 × 75 mm, 3.5 µm) column using an isocratic mobile phase (5 mm ammonium acetate:methanol, 20:80, v/v) at a flow rate of 0.8 mL/min with a total run time of 2.2 min. A detailed method validation was performed as per the FDA guidelines. The standard curves found to be linear in the range of 25.5–4900 and 15.3–3000 ng/mL for carisoprodol and aspirin, respectively. The results met the acceptance criteria. Carisoprodol and aspirin were found to be stable in various stability studies. The validated method was successfully applied to a pharmacokinetic study following co‐administration of carisoprodol (250 mg) and aspirin (75 mg) tablets by oral route to human volunteers. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
45.
K. Linganna P. Haritha K. Venkata Krishnaiah V. Venkatramu C. K. Jayasankar 《Applied physics. B, Lasers and optics》2014,117(1):75-84
Trivalent dysprosium (Dy3+)-doped K–Sr–Al phosphate glasses have been prepared and investigated for their optical and luminescence properties. Judd–Ofelt theory has been used to derive radiative properties for the 4F9/2 level of Dy3+ ions. The luminescence spectrum of 1.0 mol% Dy2O3-doped glass shows intense yellow emission around 572 nm ascribed to 4F9/2 → 6H13/2 transition with 78 % branching ratio and emission cross section of the order of 2.48 × 10?21 cm2. Moreover, the quantum efficiency of the 4F9/2 level has been found to be 76 %. The luminescence decay curves for the yellow emission (4F9/2 → 6H13/2) have been measured and analyzed as a function of Dy3+ ion concentration. The results revealed that Dy3+-doped phosphate glasses could be useful for yellow laser applications. 相似文献
46.
Biswanath Das P. Balasubramanyam Maddeboina Krishnaiah Boyapati Veeranjaneyulu 《合成通讯》2013,43(21):3825-3832
Tungstophosphoric acid has been found to be an efficient catalyst for the synthesis of pyranos- and furanoquinolines through the Imino-Diels–Alder reaction involving one-pot coupling of benzaldehydes, anilines, and 3,4-dihydro-2 H-pyran or 2,3-dihydrofuran. The products are formed at room temperature in excellent yields in a short period of time. 相似文献
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48.
Takeaki Kariya Yasunori Fujikoshi P. R. Krishnaiah 《Journal of multivariate analysis》1984,15(3):383-407
In this paper, the authors considered various procedures for testing for the independence of two multivariate regression equations with different design matrices. Asymptotic null distributions as well as nonnull distributions under local alternatives of the test statistics associated with the above procedures are also derived. 相似文献
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