The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Shaoyun Wang - One of the best experts on this subject based on the ideXlab platform.
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Production, Structure-function relationships, mechanisms, and applications of antifreeze peptides
Comprehensive reviews in food science and food safety, 2020Co-Authors: Xu Chen, Xixi Cai, Shaoyun WangAbstract:Growth of ice crystals can cause serious problems, such as frozen products deterioration, road damage, energy losses, and safety risks of human beings. Antifreeze peptides (AFPs), a healthy and effective cryoprotectant, have great potential as ice crystal growth inhibitors for a variety of frozen products. In this review, methods and technologies for the Production, purification, evaluation, and characterization of AFPs are comprehensively summarized. First, this review describes the preparation of AFPs, including the methods of enzymatic hydrolysis, chemical synthesis, and microbial fermentation. Next, this review introduces the major methods by which to evaluate AFPs' antifreeze activity, including nanoliter osmometer, differential scanning calorimetry, splat-cooling, the biovaluation model, and novel technology. Moreover, this review presents an overview of the molecular characteristics, Structure-function relationships, and action mechanisms of AFPs. Furthermore, advances in the application of AFPs to frozen food, including frozen dough, meat products, fruits, vegetable products, and dairy, are summarized and holistically analyzed. Finally, challenges of AFPs and future perspectives on their use are also discussed. An understanding of the Production, Structure-function relationships, mechanisms and applications of AFPs provides inspiration for further research into the use of AFPs in food science and food nutrition applications.
Shashi Kant - One of the best experts on this subject based on the ideXlab platform.
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Production Structure, Factor Substitution, and Total Factor Productivity in the South African Agricultural Sector:
Journal of Interdisciplinary Economics, 2005Co-Authors: D.d. Tewari, Shashi KantAbstract:The Production Structure of the South African agricultural sector is analyzed using duality theory in Production and cost. An unrestricted translog cost function is estimated, and a number of model restrictions (homothetic, homogenous, unitary elasticity of substitution, Hick’s neutral technical change, and no technical change) are tested for, but none of them was found to be statistically significant. The Allen Elasticity of Substitution (AES) and the Morishima Elasticity of Substitution (MES) are calculated to analyze factor substitution, and found that the AES may give erroneous results in the case of number of factors exceeding two. The substitution of land is found to be easiest while that of fuel to be hardest. Furthermore, technical change is found to have a negative impact on agriculture, but there are increasing returns to scale in South African agriculture. However, technical change dominates over scale effect, and results in negative total factor productivity growth. When these results are comb...
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Production Structure, factor substitution, technical change, and total factor productivity in the Canadian logging industry
Canadian Journal of Forest Research, 1997Co-Authors: Shashi Kant, Jagdish C. NautiyalAbstract:The Production Structure of the Canadian logging industry is studied using duality theory in Production and costs. An unrestricted translog cost function and nine restricted cost functions are each estimated simultaneously with the cost share equations using the Iterative Zellner method. The Allen and Morishima elasticities of substitution among pairs of inputs and price elasticities of factor demands are computed. The difference between the rate of technical change and the total factor productivity is discussed, and both are calculated. Finally, an average cost equation is calculated and the impacts of factor prices are determined. The results indicate that the Production Structure is homogeneous, but it is not subject to the unitary elasticity of substitution, Hickis neutral technical change, or no technical change. The Morishima elasticities indicate that the substitution of capital by labour or energy is easier than the substitution of labour or energy by capital. Substantial economies of scale are observed in the logging cost. In the rate of technical change, the acceleration term dominates the input factors contribution, and the rate of technical change is negative in all the years. In the total factor productivity growth, in most of the years, the rate of technical change dominates the scale effect. Average cost is the most sensitive to material price followed by labour price, and the least sensitive to energy price.
Th Christodoulopoulos - One of the best experts on this subject based on the ideXlab platform.
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telecommunications in greece a study of Production Structure and natural monopoly issue
International Journal of Production Economics, 1995Co-Authors: Th ChristodoulopoulosAbstract:Until recently Telecoms were everywhere large monopolies basically because their Production was believed to have many natural monopoly attributes. Now new forces originated in technological evolution have set in to transform the monopoly regime. But did natural monopoly attributes really exist? The empirical evidence under consideration concerns Hellenic Telecom. A complete study of the industry's Production Structure and a natural monopoly test are offered. Test's results are important for policy formation regarding market's degree of liberalization in Greece. Given also the resemblance of current technology in different countries, it is possible to claim a more general validity of the obtained results on Production technology beyond the specific case studied.
Xu Chen - One of the best experts on this subject based on the ideXlab platform.
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Production, Structure-function relationships, mechanisms, and applications of antifreeze peptides
Comprehensive reviews in food science and food safety, 2020Co-Authors: Xu Chen, Xixi Cai, Shaoyun WangAbstract:Growth of ice crystals can cause serious problems, such as frozen products deterioration, road damage, energy losses, and safety risks of human beings. Antifreeze peptides (AFPs), a healthy and effective cryoprotectant, have great potential as ice crystal growth inhibitors for a variety of frozen products. In this review, methods and technologies for the Production, purification, evaluation, and characterization of AFPs are comprehensively summarized. First, this review describes the preparation of AFPs, including the methods of enzymatic hydrolysis, chemical synthesis, and microbial fermentation. Next, this review introduces the major methods by which to evaluate AFPs' antifreeze activity, including nanoliter osmometer, differential scanning calorimetry, splat-cooling, the biovaluation model, and novel technology. Moreover, this review presents an overview of the molecular characteristics, Structure-function relationships, and action mechanisms of AFPs. Furthermore, advances in the application of AFPs to frozen food, including frozen dough, meat products, fruits, vegetable products, and dairy, are summarized and holistically analyzed. Finally, challenges of AFPs and future perspectives on their use are also discussed. An understanding of the Production, Structure-function relationships, mechanisms and applications of AFPs provides inspiration for further research into the use of AFPs in food science and food nutrition applications.
My Hedhammar - One of the best experts on this subject based on the ideXlab platform.
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spider silk proteins recent advances in recombinant Production Structure function relationships and biomedical applications
Cellular and Molecular Life Sciences, 2011Co-Authors: Anna Rising, Mona Widhe, Jan Johansson, My HedhammarAbstract:Spider dragline silk is an outstanding material made up of unique proteins—spidroins. Analysis of the amino acid sequences of full-length spidroins reveals a tripartite composition: an N-terminal non-repetitive domain, a highly repetitive central part composed of approximately 100 polyalanine/glycine rich co-segments and a C-terminal non-repetitive domain. Recent molecular data on the terminal domains suggest that these have different functions. The composite nature of spidroins allows for recombinant Production of individual and combined regions. Miniaturized spidroins designed by linking the terminal domains with a limited number of repetitive segments recapitulate the properties of native spidroins to a surprisingly large extent, provided that they are produced and isolated in a manner that retains water solubility until fibre formation is triggered. Biocompatibility studies in cell culture or in vivo of native and recombinant spider silk indicate that they are surprisingly well tolerated, suggesting that recombinant spider silk has potential for biomedical applications.
