排序方式: 共有35条查询结果,搜索用时 31 毫秒
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Yi Shuping Gai Xuchang Xu Xiangsui 《保鲜与加工》1992,(2):65-70
Based on Group Technology, part families of the norm of working hour are formed according to the similarity among components. With the progressive regerssion, the models of the norm of working hour are built for every part family. A computer aided norm model building program and a computer aided norm of working hour planning system are developed. The system is successfully integrated with CAD/CAPP system. Some examples of the model building and calculation results are illustrated as well. 相似文献
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酶解牛乳蛋白多肽复合果汁乳酒工艺研究 总被引:1,自引:1,他引:1
为克服传统乳酒缺陷,该文采用蛋白酶水解法及酒精酵母乳酸菌混合发酵法研究了牛乳蛋白多肽复合果汁乳酒的生产工艺。通过对比和正交试验确定了牛乳蛋白的最佳水解酶、水解条件及牛乳蛋白多肽复合果汁乳酒的发酵条件和配方。结果表明:牛乳蛋白的最佳水解酶是中性蛋白酶,最佳水解条件是:酶用量140 mg/L,温度50℃,pH 6.5,酶解5 h,牛乳蛋白水解最彻底;牛乳蛋白多肽复合果汁乳酒的最佳发酵条件为经中性蛋白酶水解的牛乳,用蔗糖调整其糖度为15%,再配以4%的猕猴桃浓缩汁,添加0.35% kefir发酵剂在25℃发酵12 h,发酵液中的酒精及总酸含量较高;牛乳蛋白多肽复合果汁乳酒的最佳配方组成是:发酵液60%、糖6%、酸0.28%、甜味剂0.1%、稳定剂0.5%、复合香精0.06%、风味增强剂8 mg/L,乳酒品质最好。 相似文献
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应用Ec3.2.1.5果胶酶以正交试验法对黑加伦果浆进行不同条件的处理,并且考虑到果汁加工的实际情况,选择出了最适的酶处理技术及参数,即在45℃条件下用60μg/g酶处理黑加伦原果浆4h,可提高黑加果汁出汁率10%,并对酶的处理过程进行了动力学分析。 相似文献
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金枪鱼围网沉降特性 总被引:6,自引:3,他引:3
根据沿围网下纲缚扎的10只温度深度计(TDR-2050型)自动记录的23网次有效数据,对中国中西太平洋金枪鱼围网的下纲沉降速度、沉降深度及其与时间的关系进行了研究。结果表明:(1)网具未达到理论沉降深度,网具中部平均沉降深度为160 m,为最大拉紧高度(311.1 m)的51.4%;(2)网具中部沉降深度与时间的关系为h=–0.000 2t2+0.3663 t;(3)网具各部位的沉降速度不同,取鱼部最慢,网具中部次之,后网头最快;(4)下纲各部位沉降速度均随着深度的增加而减小,沉降速度波动幅度随深度增加按大—小—大的规则变化;(5)网具中部沉降速度与时间的关系为:v=3×10–7t2–7×10–4 t+0.418 9。本研究结果可为改善金枪鱼围网沉降性能提供基础数据,并为海上生产提供指导性参考。 相似文献
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New Varieties of Populus tomentosa Carr. and Breeding Techniques 总被引:2,自引:0,他引:2
ZHOU Hui-ru Virescence Maintenance Management Office of Xuchang City Henan Province Xuchang 《(《农业科学与技术》)编辑部》2008,(2)
The main morphological characteristics,producing area and growth characteristics of sixteen new varieties of Chinese white poplar (Populus tomentosa Carr.) are reported,aiming at providing reference for breeding and extension of new varieties. 相似文献
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Red deer can adjust to seasonal change of forage quality to maintain a relatively constant crude protein level (21.1±4.0,
14.7±1.0, 11.1±1.1 and 6.5±0.8 in spring, summer, fall and winter, respectively). Apparent protein digestibility is variable
from −99.9% to 97.5% depending upon season and forage type. True protein digestibility is 99%. Digestion of protein is significantly
influenced by phenolics in diets. Minimum digestible energy intake of 153.5 kcal/kg0.75/day is necessary to maintain a positive nitrogen balance. Red deer recycles 18–85% of the urea produced and urea kinetic
parameters (urea pool size urea entry rate and urea excretion rate) are correlated to plasma urea concentration. Rumen NH3-N production changes with season, but seasonal changes in other NH3-N kinetic parameters (NH3-N concentration, NH3-N pool size and NH3-N outflow rate) are in dispute. Protein metabolism may be promoted in response to cold stress. Endogenous urinary nitrogen
is 0.09 (red deer) and 0.16 g N/kg0.75·day (elk). and metabolic fecal nitrogen is 5.58 g N/kg dry-matter intake. Protein requirements ranges from 100 g/kg DM to
170 g/kg DM for red deer of various ages and physiological stages. In conclusion, the knowledge of protein nutrition of red
deer is limited. Much work is urgently needed in metabolism and requirements of protein before the appropriate feeding standard
of red deer is coming. 相似文献
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动物园环境丰容与动物福利管理 总被引:3,自引:0,他引:3
环境丰容是我国动物园近十几年来新接触的概念。近年来,环境丰容逐渐地被引入到我国动物园的建设和管理中,我国动物园相继开展丰容的相关工作,并取得了一定的成效,是动物园工作中的一个热门话题。动物福利是动物的一种康乐状态。开展动物福利,对于人类、自然及社会的和谐发展有着重要的作用。要强化和完善我国的动物福利保护,必须明确动物福利的管理,确定有关的强制性法律规范,提高民众的动物福利意识。本文简要介绍了丰容原则、内容和动物福利的管理,为动物园今后更好地开展环境丰容的相关工作和如何提高动物福利的问题提供借鉴。 相似文献
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蒋黎明 《中国农村水利水电》1994,(5)
本文依据文丘里流量计的原理,提出了一种新型量水计,利用孔口隔片取代文丘里流量计喉道以后的部分,并用压力表代替测压管,同时把压力表的刻度数值换算成流量值,测流时直接读取流量值,结构简单,计量精度高,特别适合农村机井和机电灌站灌溉管道的流量计量。 相似文献