侧限单面渗流冷榨下的菜籽应力应变关系反演

进行了单面渗流下菜籽及脱皮菜籽冷榨的应力、应变试验 ,研究了不同加载速率对应力、应变关系的影响 ,采用川北方程建立菜籽及脱皮菜籽的侧限单面排油压榨的应力、应变关系 ,运用改进模拟退火算法反求应力、应变关系参数。结果表明 :在相同压榨应力时 ,单面渗流下的应变小于双面渗流下的应变 ;加载速率对其应力、应变关系的影响均较大 ,应变随加载速率的减小而增加 ;脱皮菜籽的应变大于未脱皮菜籽的应变 ;川北方程能较好地模拟菜籽及其脱皮菜籽的侧限单面排油压榨的应力、应变关系。     

食用菜籽蛋白的提取和纯化研究进展

详细介绍了菜籽蛋白的组成与结构、营养价值及提取和纯化的研究进展,阐述食用菜籽蛋白开发的可行性,以期引起人们对菜籽蛋白开发的重视.     

菜籽饼粕蛋白的提取、功能特性及其在食品中应用的研究进展

菜籽饼粕作为油菜籽榨油后的副产物,其蛋白质含量丰富、氨基酸组成均衡,是一种优质的植物蛋白资源,但长期以来主要用于饲料行业,经济效益较低。从菜籽饼粕中提取的菜籽蛋白已被证明具有良好的乳化性、凝胶性等功能特性及降血压、抗氧化等生理活性。目前,菜籽蛋白已被欧盟及FDA批准作为新食品原料,可作为人类食用的优质植物蛋白资源。本文论述了菜籽饼粕蛋白的提取方法、功能特性及其在食品中的应用现状,旨在为菜籽饼粕蛋白的进一步开发与合理应用提供理论依据及技术支撑。     

超临界萃取VE的抗肿瘤活性研究

对超临界萃取菜籽VE,α-VE和菜籽VE α-VE的抗肿瘤作用及对荷瘤小鼠免疫功能的影响进行了研究.通过建立S180移植瘤模型,观察了超临界萃取菜籽VE,α-VE和菜籽VE α-VE的抗肿瘤效果,并进行了病理学和免疫学指标测定.实验发现超临界萃取菜籽VE,α-VE和菜籽VE α-VE有抑制S180肿瘤生长的作用,有明显的抑制肿瘤生长的病理学特征,并能显著增强荷瘤小鼠脾指数、巨噬细胞吞噬功能、二硝基氟苯(DNFB)所致的迟发型超敏反应(DTH)和血清溶血素的含量,超临界萃取菜籽VE和菜籽VE α-VE的效果好于α-VE.     

菜籽分离蛋白及菜籽蛋白肽的功能特性研究

将菜籽分离蛋白和菜籽蛋白肽的功能特性进行比较,它们均对热稳定,其中菜籽蛋白肽的溶解性比菜籽分离蛋白有显著地提高,菜籽蛋白肽的起泡性及起泡稳定性均比菜籽分离蛋白好。     

间歇式饲用菜籽磷脂的生产

为了扩大菜籽磷脂在饲料行业的应用,论述了菜籽磷脂生产工艺、设备及操作方法,讨论了生产菜籽磷脂的影响因素.NL-1400型磷脂锅日处理菜油脚10 t,生产出饲用菜籽磷脂每吨油脚直接加工成本为124.75元,每吨油脚增值730.25元.具有较好的社会效益和经济效益.     

超临界萃取V_E的抗肿瘤活性研究

对超临界萃取菜籽VE,α-VE和菜籽VE+α-VE的抗肿瘤作用及对荷瘤小鼠免疫功能的影响进行了研究。通过建立S180移植瘤模型,观察了超临界萃取菜籽VE,α-VE和菜籽VE+α-VE的抗肿瘤效果,并进行了病理学和免疫学指标测定。实验发现超临界萃取菜籽VE,α-VE和菜籽VE+α-VE有抑制S180肿瘤生长的作用,有明显的抑制肿瘤生长的病理学特征,并能显著增强荷瘤小鼠脾指数、巨噬细胞吞噬功能、二硝基氟苯(DNFB)所致的迟发型超敏反应(DTH)和血清溶血素的含量,超临界萃取菜籽VE和菜籽VE+α-VE的效果好于α-VE。     

侧限单面渗流冷榨下的菜籽应力应变关系反演

进行了单面渗流下菜籽及脱皮菜籽冷榨的应力、应变试验，研究了不同加载速率对应力、应变关系的影响，采用川北方程建立菜籽及脱皮菜籽的侧限单面排油压榨的应力、应变关系。运用改进模拟退火算法反求应力、应变关系参数。结果表明：在相同压榨应力时，单面渗流下的应变小于双面渗流下的应变；加载速率对其应力、应变关系的影响均较大，应变随加载速率的减小而增加；脱皮菜籽的应变大于未脱皮菜籽的应变；川北方程能较好地模拟菜籽及其脱皮菜籽的侧限单面排油压榨的应力、应变关系。     

碱提和超声波辅助提取菜籽蛋白比较研究

以热榨春油菜菜籽粕为原料,研究了碱提和超声波辅助提取两种方法对菜籽蛋白的提取效果,比较了两种方法提取的菜籽蛋白的性质差异。结果表明:超声波辅助提取效果好,提取时间短,提取率高;超声波辅助提取的菜籽蛋白吸水性、氮溶解指数、起泡性及泡沫稳定性、乳化性及乳化稳定性相对碱提法都有很大提高,而且在酸性条件下,超声波辅助提取的菜籽蛋白仍然具有较好的起泡性和泡沫稳定性。研究表明采用超声波辅助提取菜籽蛋白,不仅提取效果好,而且对菜籽蛋白起到了改性作用,提高了其部分功能性质。     

菜籽肽的制备分离和化学修饰研究进展

菜籽肽具有独特的加工特性和生物活性。综述了菜籽肽的制备方法、分离技术、化学修饰和菜籽蛋白水解液中小肽氨基酸组成测定方法的研究进展,指出了菜籽肽生产工艺中存在的问题,提出了发酵法生产菜籽肽的新思路,对菜籽肽的应用前景进行了展望。     

无线条码扫描技术在备件仓库实时管理中的应用

龙岩卷烟厂MIS系统中的备件库管理子系统,存在过多的人工环节,常常导致发料信息错误。为此,将无线条码扫描技术应用于备件库的领发料过程,该系统由3部分组成:数据采集与发射装置;数据接收和终端接口电路;HOST主机数据库管理系统。实现业务内容包括备件无线扫描出库、备件无线扫描紧急出库和备件盘点等。该技术应用于备件仓库实时管理系统后,实现了备件库的实时动态管理,提高了备件领发料速度,减少了领发料的出错现象。     

双刀切纸机接纸台电气控制的改进

介绍了双刀切纸机接纸台的电气控制现状,并针对控制存在的问题提出了改进方案,经实际运行证明该方案可行,同时指出新方案的不足.     

连续取袋接袋机构的设计

目的:提高预制袋包装机生产效率,实现自动装袋机连续取袋接袋机构设计。方法:基于回转式充填结构,研究并设计一套预制袋在连续自动充填形式下的取袋接袋机构,实现连续式给袋送袋。结果:针对选定的预制袋供送轨迹,设计出预制袋连续取袋接袋的结构。结论:实现自动装袋机连续取袋接袋机构设计,省去了预制袋充填的间歇等待时间,提高生产效率。为预制袋连续性充填机械结构的研究奠定前期基础。     

电场均匀性对单孔静电纺丝的影响

静电纺丝过程中,带电的射流会受到电场的作用。为了获得直径更小且分布均匀的纤维,在单孔静电纺丝装置的基础上,设计1组大小不同的电极和1组形状不同的接收装置的静电纺丝装置,分别在单孔静电纺丝装置中进行静电纺丝对比试验,并用Maxwell软件模拟纺丝装置中电场的分布,试验结果说明,采用尺寸较大的电极或圆锅状接收装置的静电纺丝装置电场分布均匀,纤维直径和纤维毡厚度分布也较均匀。     

Effect of leaving milk trucks empty and idle for 6 h between raw milk loads

The US Pasteurized Milk Ordinance (PMO) allows milk tanker trucks to be used repeatedly for 24 h before mandatory clean-in-place cleaning, but no specifications are given for the length of time a tanker can be empty between loads. We defined a worst-case hauling scenario as a hauling vessel left empty and dirty (idle) for extended periods between loads, especially in warm weather. Initial studies were conducted using 5-gallon milk cans (pilot-scale) as a proof-of-concept and to demonstrate that extended idle time intervals could contribute to compromised raw milk quality. Based on pilot-scale results, a commercial hauling study was conducted through partnership with a Pacific Northwest dairy co-op to verify that extended idle times of 6 h between loads have minimal influence on the microbiological populations and enzyme activity in subsequent loads of milk. Milk cans were used to haul raw milk (load 1), emptied, incubated at 30°C for 3, 6, 10, and 20 h, and refilled with commercially pasteurized whole milk (load 2) to measure cross-contamination. For the commercial-scale study, a single tanker was filled with milk from a farm known to have poorer quality milk (farm A, load 1), emptied, and refilled immediately (0 h) or after a delay (6 h) with milk from a farm known to have superior quality milk (farm B, load 2). In both experiments, milk samples were obtained from each farm's bulk tank and from the milk can or tanker before unloading. Each sample was microbiologically assessed for standard plate count (SPC), lactic acid bacteria (LAB), and coliform counts. Selected isolates were assessed for lipolytic and proteolytic activity using spirit blue agar and skim milk agar, respectively. The pilot-scale experiment effectively demonstrated that extended periods of idle (>3 h) of soiled hauling vessels can significantly affect the microbiological quality of raw milk in subsequent loads; however, extended idle times of 6 h or less would not measurably compromise milk quality in subsequent loads in commercial tankers. Current tanker sanitation practices appear to be sufficient for maintaining raw milk SPC, LAB, and coliform levels, which are important measures of milk quality.     

USS通信技术在造纸机电气传动系统中的应用

基于西门子公司的S7-200和6SE70变频器构成的USS网络系统的现代的控制理念.应用于造纸机电气传动系统中,以其先进的全数字控制方法,解决了以往模拟传动系统中存在的信号不稳定、参数调整麻烦等问题,投资少、安装接线简便、调试操作灵活、抗干扰性强、数据传输稳定可靠、精度高,完全符合造纸机传动系统中稳速、同步等要求.     

气波制冷机接受管最佳管长的研究

对气波制冷机接受管内的气波行为进行分析,提出了两种结构型式接受管的理想边界条件并给出了波图,从而得出管长的计算公式。     

试论汽车卸粮坑的工艺设计方案

对包括近几年出现的包围式、单坑计量式、多坑计量式卸粮坑在内的各种形式的卸粮坑的特点、适用范围进行了论述，介绍了出料设备的类型和使用方法。提出了设计和使用建议，以供工程设计人员参考。     

如何搞好浓香型曲酒的量质摘酒

摘酒不难,凭数量、经验摘酒是量质摘酒中的不良问题。量质摘酒工作非常重要,只有做到：１．加强工艺管理,严格摘酒操作;２．重视提高摘酒工的素质;３．加强摘酒工知识和能力培训;４．举行摘酒岗位技术比赛,推动学知识、学技术的积极性;５．提高摘酒工待遇等,才能搞好和实现量质摘酒工作。（永光）     

Effects of premilking stimulation on complete lactation milk yield and milking performance

Effects of premilking preparation on complete lactation performance were measured with two groups of multiparous Holstein cows; 1) 17 cows received full stimulation, a 60-s routine, and 2) 16 cows received minimum stimulation, a 15-s routine, before machine attachment. Actual unadjusted average lactation milk yield for cows receiving full stimulation was 5.4% less than that for cows receiving minimum stimulation. When postpeak persistencies were compared by linear regression of either 1) daily milk weights or 2) 3.5% FCM from DHI records of milk yield and milk fat percent and fitted to lactation curves using an incomplete gamma function, cows receiving full stimulation produced 1) 2.8 or 2) 2.5% more milk per lactation than did cows receiving minimal stimulation. However, none of the treatment differences in mean milk yield was significant statistically. Milk flow rates, strip yields, and machine on-times were measured at 8-wk intervals throughout lactation. Cows receiving full stimulation had significantly higher average milk flow rates and shorter machine on-times starting at wk 32. There were no significant differences in strip yields or percent residual milk between cows receiving full and minimum stimulation.