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排序方式: 共有97条查询结果,搜索用时 15 毫秒
61.
Fu CJ Jez JM Kerley MS Allee GL Krishnan HB 《Journal of agricultural and food chemistry》2007,55(10):4014-4020
Soybean meal (SBM), the major byproduct of soybean oil extraction, is the main protein source for swine diets globally. In the United States, 8.6 million metric tons of SBM was used in swine rations in 2004. The pathological effect and immunological response of SBM feeding have been demonstrated in swine. In this study, we have utilized plasma collected from piglet feed with SBM in immunoblot analysis to detect proteins that elicited antigenic responses. We have identified soybean beta-conglycinin alpha-subunit as being a potential allergen for young piglets. Characterization of this protein indicated that deglycosylation and pepsin digestion did not eliminate immunoreactivity of this protein. Epitope mapping utilizing planar cellulose supports technology (SPOT) showed that three peptides spanning amino acids S185-R231 were critical for the allergenicity. A computer-generated three-dimensional structure model of the alpha-subunit of beta-conglycinin indicated that the antigenic epitopes were located on the surface of the protein. Information from this study may assist in the construction of recombinant nonallergenic soybean protein useable for both immunotherapy and the potential production of hypoallergenic soybean plants. 相似文献
62.
Annamalai Malarvizhi Manoharan Saravanan Rama Krishnan Poopal Jang-Hyun Hur Mathan Ramesh 《Water, air, and soil pollution》2017,228(8):310
Acute (24 h) and sublethal (35 days) effects of cadmium chloride (CdCl2) were examined in Cirrhinus mrigala using various endpoints (accumulation pattern, thyroid hormones (THs), and antioxidants). The mean concentrations of CdCl2 for 24 and 96 h were found to be 35.974 and 22.387 mg L?l, respectively. LC50 concentration of CdCl2 for 24 h (35.97 mg L?l) was used for the acute study. For the sublethal studies, fish were exposed to 3.59 mg L?1 (Treatment I) and 7.19 mg L?1 (Treatment II) corresponding to 1/10th and 1/5th of 24 h LC50 of the CdCl2. During acute exposure, higher accumulation of CdCl2 was noticed in the gill, liver, and kidney of C. mrigala, which is found in the order gill > liver > kidney tissues. Similarly, in sublethal treatments (Treatment I and II), a concentration and time-dependent increase of CdCl2 accumulation was noticed in the order of gill > liver > kidney. GSH, GST, and GPx activities were found to be relatively lower from the treated groups in both acute and sublethal treatments. However, LPO activity was significantly increased in CdCl2-treated fish C. mrigala. Further, plasma T3 reduction was more pronounced than T4 in acute study. During sublethal treatments, both T4 and T3 levels showed a continuous decrease as the exposure period extended. All the values in this study were statically significant (P < 0.01 and P < 0.05). 相似文献
63.
The effects of damping on the bending and twisting modes of flax fibre-reinforced polypropylene composites are investigated. The laminate was manufactured by a vacuum bagging process; its dynamic behaviour was then found from the vibration measurements of a beam test specimen using an impulse hammer technique to frequencies of 1 kHz. The frequency response of a sample was measured, and the bending and twisting responses at resonance were used to estimate the natural frequency and loss factor. The single-degree-of-freedom circle-fit method and Newton’s divided differences formula were used to estimate the natural frequencies as well as the loss factors. The damping estimates were also investigated using a “carpet” plot. The results show significant variations in loss factors depending on the type of mode. The loss factor generally lies in the range of 1.7-2.2 % for the bending modes, while 4.8 % on average for the twisting modes. Numerical estimates of the response, and in particular the natural frequencies, were made using a Mechanical APDL (ANSYS parametric design language) finite element model, with the beam being discretised into a number of shell elements. The natural frequencies from the finite element analysis show reasonably good agreement (errors < 5 %) with the measured natural frequencies. 相似文献
64.
R Krishnan 《The Indian veterinary journal》1966,43(6):486-488
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67.
Diego Valderrama Sivaraman Iyemperumal M. Krishnan 《Aquaculture Economics & Management (Blackwell Science)》2013,17(4):369-394
Shrimp farming in India has developed at an uneven pace since export-oriented production began in the early 1990s. The introduction of Penaeus vannamei in 2009 along with disease-related production declines in competing Asian nations has led to a remarkable expansion in recent years. It is clear that the long-term success of Indian shrimp farming will continue to rely on the widespread adoption of Better Management Practices (BMPs). A two-round stakeholder Delphi survey was conducted in 2012 to elicit views and build consensus on the relative importance of a comprehensive set of BMPs covering most aspects of shrimp farming production. While the vast majority of BMPs were considered important, respondents placed greater emphasis on those BMPs aimed at improving production efficiency. Also, BMPs focused on overall outcomes were ranked higher than those placing specific restrictions on input usage. Results also yielded interesting policy implications on BMPs that are yet to be widely adopted such as distance between farms and construction of effluent treatment systems. 相似文献
68.
Mohammed Faisal Peeran Nagendran Krishnan Prema Ranjitham Thangamani Karthikeyan Gandhi Raguchander Thiruvengadam Prabakar Kuppusamy 《European journal of plant pathology / European Foundation for Plant Pathology》2014,138(1):167-180
Banana anthracnose incited by Colletotrichum musae (Berk & Curt.) Arx. is a serious disease both in the field and after harvest. Nineteen isolates of antagonistic bacteria and twelve isolates of yeast were screened for the biocontrol activity against this disease. Pseudomonas fluorescens (FP7) had the highest inhibition rate of mycelial growth of C. musae. Water-in-oil formulation of P. fluorescens (FP7) was developed by adding various oils such as coconut (28.50 %), rice bran (28.50 %) and castor (28.50 %) individually to the bacterial culture. Addition of these oils allowed bacterial populations to survive at various levels up to 210 days of storage, the duration of experiment; whereas in the control treatment (NA broth) it survived at high levels only up to 45 days. Biochemical and antibiotic characterization of P. fluorescens (FP7) in water in oil formulation showed more intensity up to 180 days. Two field trials were conducted to standardize the water in oil formulation. The application of water-in-oil formulation significantly increased the yield (63.56 t/ha), and nutritional factors. 相似文献
69.
Gross primary production (GPP) is often expressed as the product of absorbed photosynthetically active radiation and the efficiency (epsilon) with which a plant community uses absorbed radiation in biomass production. Light-use efficiency is affected by environmental stresses, and varies diurnally and seasonally. Uncertainty about epsilon can be a serious limitation when modeling GPP. An important determinant of epsilon is the amount and type of solar radiation incident on a canopy, because an abundance of light can trigger a photo-protective reaction, diminishing GPP. The radiation regime in a forest canopy is determined by the predominant sky conditions and by mutual shading of tree crowns. Shading effects, producing shifts in the amount of incident direct and diffuse solar radiation, have been largely ignored, however, because they depend on forest structure and are difficult to measure. We describe a new approach for estimating changes in mutual canopy shading throughout the day and year based on a canopy structure model derived from light detection and ranging (LiDAR). Proportions of canopy shading were then combined with eddy covariance data to assess the explanatory power for variance in epsilon by regression tree analysis over half-hourly, daily and weekly time scales. The approach explained between 75 and 97% of variance in epsilon, representing an increase of between 5 and 16% compared with models driven solely by meteorological variables. 相似文献
70.
This study documented the history of lake fisheries in Kashmir, India, and estimated the trends in fish production using Kane's cross impact analysis (CIA) and stakeholders’ willingness to pay (WTP) for the restoration of the Schizothorax fisheries. Kane's CIA model for Lake Dal indicated a perceptible drop in Schizothorax production in the long run, and that the total catch is being maintained by an increasing contribution by carp. In Lake Wular, the CIA indicated that the size of the lake still offers scope for the co‐existence and growth of both Schizothorax as well as carp. A Classification and Regression Tree (CART) model was used to data mine multiple stakeholder responses to make a case for sustainable development of the Schizothorax fisheries in the lakes of Kashmir. The amount of time spent on the lakes to earn their livelihoods emerged as the single most important variable that determined WTP by stakeholders followed by income, type of stakeholder and age. The pruned tree gave the hierarchy of the variables that determined WTP. The results made a strong case for a concerted multi‐institutional action plan for the restoration of the Schizothorax fisheries in the lakes of Kashmir. 相似文献