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101.
The potential of lycopene extract, to enhance the shelf life of anhydrous buffalo milk fat, at five levels, viz. 30, 60, 90, 120 and 150 ppm, was evaluated. Lycopene was found significantly (P < 0.05) effective in preventing the development of oxidative rancidity. The overall preference score for samples containing 30, 60, 90, 120 and 150 ppm of lycopene were 7.43, 7.60, 7.80, 7.96 and 7.90, respectively, and found to be significantly higher than the control (no lycopene, 6.79). The overall preference score with 200 ppm BHA was 7.94, which was not significantly different from ghee samples containing 120 and 150 ppm lycopene. 相似文献
102.
Principal components analysis (PCA), ratioing, image differencing and intensity-hue-saturation (IHS) transformation have been widely used in monitoring various natural resources and environmental hazards. In our study, the temporal behaviour of salt-affected soils in the Indo-Gangetic alluvial plains of Uttar Pradesh has been studied using Landsat MSS data for 1975 and 1992. Apart from routine digital classification of temporal MSS data using Guassian maximum likelihood algorithm, PCA, image differencing, and ratioing were also evaluated for their potential in bringing out temporal changes in salt-affected soils, if any. The results indicate that the third principle component, image differencing, and ratioing of the first two MSS bands for two periods have brought out substantial information associated with the temporal behaviour of saltaffected soils. 相似文献
103.
This paper discusses the application of super-conducting high gradient magnetic separator for the recovery of very-fine size uranium bearing mineral values present in the flotation tailings of an Indian copper ore. The U3O8 content of the tailings is 0.009%. The focus of this study is centered on determining the effect of various process variables like applied magnetic field, wool filling factor in the canister, wool diameter, loading capacity of the matrix, feed flow-rate and slurry pH on the recovery of uranium values in the magnetized matrix. The results indicate significant improvement in the recovery of <10 μm size uranium bearing particles, to the extent of 60–65% in SCHGMS as against mere 20% in other high intensity magnetic separators. The enrichment ratio of U3O8 values in the magnetic fraction was in the range of 2.2–2.5 only due to interference from other magnetic minerals. 相似文献
104.
Venkata Sreenivas Puli I.C. PanwarR.S. Katiyar 《Journal of Alloys and Compounds》2011,509(32):8223-8227
At present BiFeO3 (BFO) is the most attractive and sole example, which possesses low magnetization value, high leakage current and low polarization in ceramic form. Single-phase room temperature multiferroics are rare in nature. This paper deals with the improved magnetic and observed linear magneto-electric coupling in Co and Sm co-doped BiFeO3 ceramics synthesized by sol-gel process at low temperature ∼600 °C. As synthesized Bi0.9Sm0.10Fe0.95Co0.05O3 (BSFCO) showed high impurities phases (20%) over wide range of calcination temperatures. Impurity phases reduced drastically from 20% to 5% after leaching with nitric acid. However the electrical and the magnetic properties were almost the same for both phases. Well-defined magnetic hysteresis with high magnetic moment was found at room temperature. Ferroelectric polarization studies demonstrated similar values and shape as reported in literature for the pure bulk BFO. Linear magneto-electric (ME) coupling and weak ME coefficient (α) ∼ 0.6 e−10 s m−1 were observed in the co-doped BFO. The origin of the strong ferromagnetic property in our samples may be due to the presence of rare earth and transition metal ions at the lattice sites of BFO or due to impurity phase, since we have not seen any change in magnetization with reduction of impurity phase the later effect is more unlikely. 相似文献
105.
106.
DV Sreenivas C Bharavi F Anjum N Kumar YR A Kumar 《Canadian Metallurgical Quarterly》1998,43(12):2606-2609
We report a case of spontaneous hemobilia in a hemophilia patient presenting with classical Sandblom's triad of symptoms. Endoscopic retrograde cholangiography was helpful in establishing the diagnosis. Hemobilia subsided with factor VIII replacement and endoscopic nasobiliary drainage. Endoscopic nasobiliary drainage resulted in lysis of the clots in the biliary tree and relief of obstructive jaundice. 相似文献
107.
Electrolyte flow distribution is an important factor that contributes to the performance of the overall efficiency of a redox flow battery system. In the present paper, a comparative study of the hydrodynamics of the serpentine and interdigitated flow fields has been performed. Ex situ experiments were conducted using the two flow fields in conditions typical of flow battery applications. Limited in situ testing has also been conducted. These bring out the surprising result that the pressure drop in the interdigitated flow field is less than that in the serpentine for the same flow rate. Computational fluid dynamics studies show strong under-the-rib convection in the reaction zone exists in both flow fields but with a shorter residence time in case of the interdigitated. It is posited that this may explain the superior electrochemical performance of cells with interdigitated flow fields. 相似文献
108.
Prapun Wattanadechachan Riyad Aboutaha Osman Hag-Elsafi Sreenivas Alampalli 《Canadian Metallurgical Quarterly》2006,11(4):465-473
The paper investigates thermal compatibility between wearing surface (WS) materials and glass fiber reinforced polymer (GFRP) bridge decks, and proposes a more durable hybrid WS system for GFRP decks. Wearing surface delamination problems observed on many existing GFRP bridge decks motivated the investigation and the search for a durable WS material that could alleviate the problems. Several WS materials were bonded to GFRP panels, with and without surface preparation, and tested under various environmental conditions. In addition to the standard ASTM C884 method, the testing program included two new methods for thermal compatibility testing to reflect the in-service conditions of WSs on GFRP bridge decks. The proposed methods were developed to account for the influence of freeze–thaw–heat and submerge–freeze cycles on thermal compatibility and durability. The investigation concluded that a hybrid WS system, consisting of two-layered WS materials, has the best bond quality. Applied directly on top of a GFRP deck, the top layer of the hybrid WS system had the best tire resistance, forming a nonskid riding surface. 相似文献
109.
A three-dimensional model of a twisted cord embedded in rubber matrix was investigated to estimate the interface stresses. CAD model of the twisted cord geometry through blended feature was carried out using Pro/ENGINEER software. Twisted cord model representative of a typical cord was developed and analyzed for a realistic analysis of cords used in cord–rubber structure. Finite element analysis was performed on the models under axial, and combined axial and lateral loading using the ANSYS software. A circular cord with surrounding rubber model was also analyzed and the results obtained were validated with other studies that exist in the literature. The stresses and deformations obtained from the finite element analysis are shown for various cases illustrating the effects of twist, rubber modulus, and non-circular cord. 相似文献
110.
A Ritz-based static analysis procedure is described for fiber-reinforced plastic, skew bridge superstructure, or deck, with a parallel grid core. This is a simplified analysis method based on a transformed plate formulation and the classical Ritz method. The rib core bridge superstructure, or deck, is idealized as a homogeneous, orthotropic skew plate to which the Ritz method is applied to discretize the resultant, equivalent orthotropic skew plate. Three laminated skew plate examples are presented; the results are compared with finite-element solution to verify the validity of the simplified method. A practical demonstration of a rib core skew bridge superstructure is investigated using the simplified method. The procedure provides a useful analysis tool that can be used in the preliminary design stage without the use of finite-element analysis. 相似文献