Results 21 to 30 of about 606 (139)
Mechanism analysis on anisotropic degradation of sandstone in freeze thaw environment based acoustic emission [PDF]
In the freeze-thaw environments, the fracturing of bedding rock poses a significant threat to the stability of the projects in cold regions, leading to potential engineering accidents.
Bing LIU +4 more
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Experimental study on dynamic mechanical behavior of frozen sandstone with different saturations [PDF]
, 2023 Water content is one of the critical factors affecting frost damage to rock masses in alpine regions. A dynamic disturbance load further complicates the issue.
Hai PU, Junce XU, Ziheng SHA
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Shuitu Baochi Xuebao, 2023 为揭示季节性冻融区土壤侵蚀阻力的变化机制,确定影响土壤侵蚀阻力主控因子,通过室内冻融模拟、水槽冲刷和土壤抗剪试验,对黄绵土(SM粉质壤土)、风沙土(WS砂壤土)和黑土(KS黏壤土)侵蚀阻力影响因素进行研究。结果表明:(1)随着冻融循环次数增加,细沟可蚀性值逐渐升高,而临界剪切力降低。经历10次冻融循环后,SM粉质壤土、WS砂壤土和KS黏壤土的细沟可蚀性分别增加76%,63%,11%,临界剪切力分别减小37%,13%,91%。(2)细沟可蚀性随土壤抗剪强度、黏聚力和内摩擦角增大而减小 ...
卢超 +3 more
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Shuitu Baochi Xuebao, 2020 为了揭示东北黑土区季节性冻融循环作用和土壤性质对土壤可蚀性的影响，采集黑龙江省宾县典型薄层黑土区（BX）和克山县典型厚层黑土区（KS）0—20 cm的耕层土壤，通过室内冻融循环模拟和土壤直剪试验，分析了冻融作用和土壤性质对土壤抗剪强度的影响。结果表明：（1）经历1次冻融作用后BX和KS 2种供试土壤抗剪强度分别减小3.9%和9.2%，二者黏聚力分别减小15.2%和29.4%，内摩擦角分别减小1.4%和3.6%。经历7次冻融作用后，BX和KS 2种供试土壤抗剪强度分别减小9.1%和15.1 ...
左小锋 +6 more
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Effects of Soluble Soybean Polysaccharide on Physicochemical Properties of Glutinous Rice Flour and Quality of Quick-frozen Sweet Dumplings [PDF]
There are some problems with quick-frozen sweet dumplings, such as poor water retention, easy freezing cracking, and high adhesiveness after cooking. To improve the quality of quick-frozen sweet dumplings, this paper investigated the effects of different
Hongwei WANG +5 more
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Dynamic characteristics and damage model of freezing thawing red sandstone under impact load [PDF]
To study the dynamic mechanical properties and damage evolution characteristics of freeze-thaw rocks under impact loads, 0, 15, 30, 45, and 60 freeze-thaw cycle tests and dynamic impact tests were conducted on red sandstone in cold regions.
Huiming ZENG +5 more
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Shuitu Baochi Xuebao, 2021 为明确秋耕对季节性冻融土壤热状况的调控作用，对比分析了翻耕（FG）、免耕（MG）、垄沟（LG）、翻耕活性炭覆盖（FH）和翻耕秸秆覆盖（FJ）5种处理对土壤温度、冻融循环以及土壤温度梯度等影响的差异。结果表明：与传统FG处理相比，MG、LG、FH、FJ处理均减弱了土壤温度与气温的相关性，降低了整个冻融期土壤温度的升、降温幅度和不同冻融阶段土壤温度昼夜变化的变异性程度，维持土壤温度序列稳定的能力FJ>FH>LG>MG。FG处理最先冻结和融化，其余处理延缓土壤冻结和融化速度的效果为FJ>FH>LG>MG ...
孙开, 王春霞, 蓝明菊, 梁飞
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Research Progress in Effect of Freezing Treatment on Gelation and Emulsification Properties of Soy Protein and Improvement of Its Freezing Stability [PDF]
Soy protein, as one of the major plant proteins, has good functional properties such as solubility, emulsification and gelation properties. Freezing, as one of the effective ways to extend the storage period of products, is widely used in the food and ...
ZHU Xiuqing, SONG Yihan, GUO Ruqi, ZHU Ying, HUANG Yuyang, LIU Linlin
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Dianci bileiqi, 2020 通过引入ADVA152减水剂、DARA-VAIR110引气剂和硅灰对瓷绝缘子用水泥胶合剂配方进行了改进,并制备了改进型水泥胶合剂试样和瓷绝缘子试品,进行了胶合剂试块冻融循环后的抗压强度、抗折强度、体积变化率试验研究,瓷绝缘子试品冻融循环后的残余机电强度试验研究。试验结果表明,改进型水泥胶合剂能够有效提高瓷绝缘子的耐冻融循环能力。
张俊双 +3 more
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Molecular Mechanism by Which Oat β-Glucan Enhances Freeze Tolerance in Yeast [PDF]
To investigate the molecular mechanism for the effect of oat β-glucan (OβG) at different concentrations (0.5% and 1%) on freeze tolerance in yeast, yeast cells alone or under the protection of OβG were frozen and thawed up to five times.
YANG Jing, JI Shengxin, CAI Jie, YANG Yong, AI Zhilu, LI Zhen
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