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Effects of Varying temperature and constant temperature on Hatching Result of Fertilized Peacock Eggs

Agricultural Science & Technology 2016年第6期17卷 1458-1461页

作者：张京和张孝和胡平张颖聂可心北京农业职业学院畜牧兽医系北京102442

In order to investigate the effect of temperature on hatching result of fertilized peacock eggs, they were hatched under conditions of varying temperature and constant temperature respectively. The result shows that the hatching rate in the varying temperature treatment group （Group Ⅰ） is higher than that in the constant temperature treatment group （Group Ⅱ）. It suggests that the varying temperature treatment （high temperature in the early period, medium temperature in the middle period, slightly lower temperature in the late period, and slightly higher temperature in the hulling period） is in line with the optimum temperature variation in the hatching of fertilized peacock eggs, contributing the hatching of fertilized peacock eggs.

关键词： Peacock Fertilized egg Artificial incubation Hatching rate Varyingtemperature constant temperature

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Effect of Curing Regime on Degree of Al^(3+) Substituting for Si^(4+) in C-S-H Gels of Hardened Portland Cement Pastes

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Journal of Wuhan University of Technology(Materials Science) 2014年第3期29卷 546-552页

作者：胡晨光胡曙光 DING Qingjun FENG Xiaoxin HUANG Xiulin School of Materials Science and Engineering Wuhan University of Technology College of Materials Science and Engineering Hebei United University School of Materials Science and Engineering Hubei University

The effect of curing regime on degree ofAl3＋ substituting for Si^4＋（Al/Si ratio） in C-S-H gels of hardened Portland cement pastes was investigated by 29Si magic angel spinning （MAS） nuclear magnetic resonance （NMR） with deconvolution technique. The curing regimes included the constant temperature （20, 40, 60 and 80 ℃） and variable temperature （simulated internal temperature of mass concrete with 60 ℃ peak）. The results indicate that constant temperature of 20 ℃ is beneficial to substitution ofAl3＋ for Si4＋, and AI/Si ratio changes to be steady after 180 d. The increase of Al/Si ratio at 40 ℃is less than that at 20℃ for 28 d. The other three regimes of high temperature increase Al/Si ratio only before 3 d, on the contrary to that from 3 to 28 d. However, the 20 ℃ curing stage from 28 to 180 d at variable temperature regime, is beneficial to the increase of AI/Si ratio which is still lower than that at constant temperature regime of 20 ℃ for the same age. A nonlinear relation exists between the Al/Si ratio and temperature variation or mean chain length （MCL） of C-S-H gels, furthermore, the amount ofAl3＋ which can occupy the bridging tetrahedra sites in C-S-H structure is insufficient in hardened Portland cement pastes.

关键词： constant temperature variable temperature degree of Al3+ substituting for Si4+ C-S-H hardened cement pastes

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