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Long-Term Animal Feeding Trial of the Refined Konjac Meal Ⅱ. Effects of the Refined Konjac Meal on the Aging of the Brain, Liver, and Cardiovascular Tissue Cells in Rats
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作者 PENG SHU-SHENG ZHANG MAO-YU +1 位作者 ZHANG YIN-ZU AND WU ZI-HUA(School of Public Health, West China University of Medical Sciences,Chengdu 610041, China) 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 1995年第1期80-87,共8页
Rats of both sexes were fed on a basal feed containing 1% refined konjac meal (RKM) for 18 months and the effects of RKM on the cell aging were observed. A comparable group fed on the basic feed was used as the contro... Rats of both sexes were fed on a basal feed containing 1% refined konjac meal (RKM) for 18 months and the effects of RKM on the cell aging were observed. A comparable group fed on the basic feed was used as the control. Results obtained demonstrate that the long-term feeding of RKM to rats can delay the course of cell aging of the gliocyte, cadiomyocyte, and the endothelial cell of the large and medium arteriases, hence it is likely to delay the occurrence of arteriosclerosis and improve the functions of the brain, heart and vascular system. 展开更多
关键词 and Cardiovascular Tissue Cells in Rats Liver Effects of the refined Konjac Meal on the aging of the Brain Long-Term Animal Feeding Trial of the refined Konjac Meal
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Accelerated precipitation behavior of cast Mg-Al-Zn alloy by grain refinement 被引量:5
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作者 Sang-Hoon Kim Jong Un Lee +3 位作者 Ye Jin Kim Jun Ho Bae Bong Sun You Sung Hyuk Park 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第2期265-276,共12页
This study demonstrates that the precipitation behavior of 13-Mg17Al12 phase during aging and the resultant variation in hardness and mechanical properties of cast Mg-Al-Zn alloy are strongly dependent on initial grai... This study demonstrates that the precipitation behavior of 13-Mg17Al12 phase during aging and the resultant variation in hardness and mechanical properties of cast Mg-Al-Zn alloy are strongly dependent on initial grain size. Grain size reduction accelerates discontinuous precipitation at the early stage of aging treatment by increasing the area fraction of grain boundaries that can act as nucleation sites for discontinuous precipitates (DP), but it does not influence DP growth rate. Grain refinement also prematurely terminates continuous precipitation because the formation of a large number of DP reduces the amount of AI dissolved in the matrix, which is required for the formation of continuous precipitates (CP). This promotion of DP formation and early termination of CP formation significantly decrease the peak-aging time to one-third. The enhanced precipitation behavior also leads to an additional hardness improvement in the aged alloy, along with an increase in hardness owing to grain boundary strengthening by grain refinement. The amount of increase in hardness changes with aging time, which is determined by the variation of three variables with aging time: DP fraction difference between refined and nonrefined alloys, hardness difference between DP and matrix, and matrix hardness difference between the two alloys. Grain refinement improves both tensile strength and ductility of the homogenized alloy owing to grain boundary strengthening and suppression of twinning activation, respectively. However, the loss of ductility after peak-aging treatment is greater in the refined alloy because of the larger amount of DP acting as a crack source in this alloy. 展开更多
关键词 Magnesium Grain refinement aging Precipitation Tensile properties
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