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臭氧处理对竹笋木质化及相关酶活性的影响(Effects of O3on Lignification and Related Enzyme Activity in Bamboo Shoots)
竹笋 臭氧 木质化 酶活性
2010/12/29
为探索臭氧对竹笋木质化的影响,研究了100、200或300μL/L臭氧处理30min对冷藏(1±1)℃竹笋木质化及相关酶活性的影响。结果表明:臭氧处理可延缓竹笋冷藏期间硬度的上升,降低呼吸强度和乙烯释放量;可延缓PAL、POD和PPO活性的增加,其木质素和纤维素的含量分别比对照低7%~12%和8%~14%,霉变率比对照低71%~84%。臭氧处理延缓了竹笋的木质化进程。
外啮合齿轮泵动态困油模型及其参数影响分析(Dynamic Model of Trapped Oil and Effect of Related Variables on Trapped Oil Pressure in External Spur-gear Pump)
外啮合齿轮泵 困油模型 动力学模型
2009/9/25
p1;相关参数对困油的影响是矛盾的,存在优化问题。表明所建模型正确可靠,能够用于困油压力预测、振动分析与评估以及泵整体设计的最优化。
Issues Related to Marketing and Extension for Sustainable Agricultural Production in Turkey
Sustainable Agricultural Production Turkey
2009/1/23
Sustainable agriculture, although a difficult term to define operationally, includes the practice of low input agricultural production technologies. An important condition to adopt these technologies...