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什么叫制革工序?制革工序如何分类?答:由生皮制成符合市场要求的成革,需要经过一系列复杂的化学处理和机械加工的工艺过程。我们把制革过程中具有某种功能的化学处理或机械加工的操作叫做制革工序。例如:浸水工序、去肉工序、脱脂工序等统称为制革工序;浸水工序的主要功能就在于使生皮恢复到鲜皮状态。制革工序可以根据其作用分为主要工序和辅助工序。例如,浸水、浸灰、鞣制等工序就是主要工序,而称重、修边、水洗、静置等就是辅助工序。 相似文献
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对生产长绒棉/高支丝光羊毛/天丝?三组分特细号纱的纺纱工序,如清梳联工序、并条工序、粗纱工序、细纱工序、络筒工序、并捻工序等的工艺要点进行了分析。并介绍了原材料的选择、原料预处理、纺纱工艺的选择及质量把关等方面的技术难点和创新点。 相似文献
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(一)制革工序由生皮制成符合市场要求的成革,需要经过一系列复杂的化学处理和机械加工的工艺过程。我们把制革过程中具有某种功能的化学处理或机械加工的操作叫做制革工序。例如:浸水工序、去肉工序、脱脂工序等就都被称为制革工序。 相似文献
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介绍了生产木代尔和棉/麻混纺纱交织生产时,络筒工序、整经工序、浆纱工序和喷气织造工序采取的一系列有效措施,关键是浆纱工艺和浆料配方的选择及织造工艺的配置。 相似文献
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探讨CJ/T 60/40 13 tex纱生产工艺。围绕降低棉结和毛羽,通过各工序优化纺纱工艺参数和采用必要的技术措施,开清棉工序适当降低各部打手速度;梳棉工序优选针布和梳理工艺参数;精梳工序适当调整隔距;并粗工序采用合理的牵伸倍数和纺纱速度;细纱工序优化专件配置和调整纺纱十段速度;络筒工序采用合理的张力和络纱速度;加强温湿度和基础管理,使CJ/T 60/40 13 tex纱质量达到用户的较高要求。 相似文献
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一、工序与设备制材生产的主要工序如图1所示。但由于原木、制品和设备等关系,工序顺序可以改变,一部分工序也可以省略。例如,要把 相似文献
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大麻Modal混纺纱的纺制 总被引:1,自引:1,他引:0
为顺利纺制出大麻Modal混纺纱,针时大麻纤维和Modal纤维的性能,对大麻纤维进行预处理,清棉工序加强原料混和,梳棉工序控制落棉率,并条工序提高纤维伸直度,粗纱工序防止意外牵伸,细纱工序优选捻系数,并控制好各工序的温湿度,最终保证了产品的顺利生产. 相似文献
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从膳食安全视角分析了当前农民几种食物消费不足的问题及影响因素,并利用351份来自四川盆地农民的膳食回顾调查问卷和似不相关回归(SUR)法进行了实证检验。结果表明:在食物可获得性方面,经济可获得性对当前农民消费不足的多种食物具有显著影响,而购买可获得性和家庭自产只对部分食物消费具有显著影响;在家庭特征因素方面,成员健康对多种食物消费均有显著负向影响,户主文化程度只对部分食物消费有显著正向影响;购买决策者偏好及对膳食安全的认知对多种食物消费均有正向影响;替代性食物在7天内并不是相互替代而是互补的关系,但显著性水平略低。 相似文献
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干燥对谷物中淀粉和蛋白质理化特性的影响是谷物加工品质发生变化的内在原因。从淀粉粒的形态和晶型、溶胀特性、热特性、糊化特性等方面论述了干燥对谷物中淀粉的影响。从溶解性、蛋白质亚基变化等方面论述了干燥对谷物中蛋白质的影响。 相似文献
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Forty Finnish Ayrshire cows, 16 primiparous and 24 multiparous, were randomly assigned to 1 of 2 treatments (FF1 or FF5). Total mixed ration (TMR) was fed once a day on the FF1 treatment and 5 times a day on the FF5 treatment. The experiment began at calving and continued to wk 28 of lactation. The TMR consisted of a grass silage and concentrate mix. The amount of concentrate in the TMR was 51% on a DM basis. The feeding frequency had no effect on milk or energy-corrected milk yields or on milk composition. The average energy-corrected milk yield was 32.8 kg/d on the FF1 treatment and 32.5 kg/d on the FF5 treatment. The less frequent feeding increased the dry matter intake (DMI) of cows. The average DMI during the experiment was 20.9 kg/d on the FF1 treatment and 19.9 kg/d on the FF5 treatment. The difference in DMI was due to the differences in DMI of the mature cows. Energy and protein conversion tended to be lower with feeding once a day compared with feeding 5 times a day. The cows’ feeding behavior was also observed. Cows fed 5 times a day tended to eat quite evenly after each delivery, whereas on the FF1 treatment there were 2 clear feeding peaks in the evening after the feed delivery. The time spent eating during the observation period was longer on FF5 than on FF1. The cows fed once a day spent more time lying than the cows fed 5 times a day. Based on the observations of feeding behavior, feeding a TMR 5 times a day seemed to be too frequent based on the increased restlessness and decreased lying time of the cows. 相似文献
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道家养生思想以颐养"精气神"为基础,吸收了阴阳、五行、天人感应等学说,体现出了一种超前的整体意识、平衡观和生积极的态观。作为中国传统文化重要的组成部分,道家的这种养生思想对于中国传统民居环境设计从指导思想到设计手法都产生了一定的影响,并且仍具有相当的现实意义。 相似文献
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《Journal of Natural Fibers》2013,10(4):59-75
Abstract Studies on the effect of nutrient supplies on the seed quality of linseed and hemp are important both for improvements in the fertilizer extension service and for the consumer sector. The results of experiments set up on chernozem soil with 64 fertilizer treatments provided information on the relationship between nutrient supplies and seed quality. The data indicated that excessive N supplies reduced the oil content of linseed. The seed protein content increased as the N supplies improved. The P supplies had little influence on the oil and protein contents. The fatty acid composition of linseed was influenced to a greater extent by the year than by the nutrient supplies. The N supplies only caused a change in the amino acid composition of linseed when there was a substantial increase in the protein content. The effect of P supplies on the amino acid composition depended on the year. N and P fertilization had no effect on the oil content of hempseeds. Better N supplies increased the protein content and the total quantity of amino acids, but had no influence on the ratio of essential to non-essential amino acids. The fatty acid composition of hempseed was not affected by the N and P supplies. 相似文献
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儿茶素的药理作用研究综述 总被引:1,自引:0,他引:1
徐先祥 《郑州轻工业学院学报(自然科学版)》2012,27(4):60-64
对儿茶素及其类似化合物所具有的抗氧化、保护心血管、抗肿瘤、抗菌、抗病毒、抗炎、免疫调节、神经保护、调节糖脂代谢等药理作用进行了综述,指出其具有重要的医疗保健应用价值,儿茶素类的手性研究及其体内与金属离子、蛋白质等物质的相互作用将是今后研究开发的重点. 相似文献
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文章介绍了毛粗纺氨纶包芯纱的捻系数和氨纶牵伸倍数对粗纺弹力织物强伸性和弹性的影响规律,并得出了适合毛粗纺弹力织物性能的毛/氨包芯纱工艺参数. 相似文献