非蛋白氮对单细胞蛋白生产菌株生长影响的研究

主要研究了非蛋白氮对选育的山芋淀粉渣单细胞蛋白生产菌株生长的影响。采用选育的扣囊拟内孢霉 K991株、产朊假丝酵母 C986株、绿色木霉 T995株混合发酵山芋渣生产单细胞蛋白 ,结果表明适宜的非蛋白氮可有效促进不同发酵方式中菌株的生长。尿素添加量在质量分数为 2 .5 %时对扣囊拟内孢霉 K991单菌株生长有利 (7.7× 1 0 8个 /g) ,在质量分数 2 %对产朊假丝酵母 C986单菌株生长较好 (1 .2× 1 0 7个 /g)。多菌株混菌发酵好于单菌株发酵 ,尿素或硫酸铵添加量均在质量分数为 2 .0 % ,产朊假丝酵母 C986菌数和产品蛋白含量较高 ,分别为 7.0× 1 0 7个 /g和 2 5 .82 %。     

Purple Sweet Potato Attenuate Weight Gain in High Fat Diet Induced Obese Mice

Purple sweet potato (PSP) is widely grown in Asia and considered as a healthy vegetable. The objective of the current study was to determine the anti‐obesity effect of the PSP on high fat diet induced obese C57BL/6J mice. The mice were administrated with high fat diet supplemented with the sweet potato (SP) or PSP at the concentration of 15% and 30% for 12 wk, respectively. The results showed that the supplementation of SP or PSP at 30% significantly ameliorated high fat diet induced obesity and its associated risk factors, including reduction of body weight and fat accumulation, improvement of lipid profile and modulation of energy expenditure. Moreover, PSP also posed beneficial effect on the liver and kidney functions. These results indicate that PSP and SP have anti‐obesity effect and are effective to reduce the metabolic risk.     

马铃薯淀粉的生产技术装备

该文介绍了马铃薯的生产情况及其淀粉的市场前景,并深入分析了国内现有马铃薯淀粉生产线技术装备水平,生产的工艺技术装备及其异同。     

番石榴叶、番薯叶中多糖的提取和测定

多糖有控制血糖,降胆固醇,降血脂等生理功能。本实验采用乙醇脱脂法制得番石榴叶、番薯叶粗多糖的提取得率分别为15.3%、9.7%。采用苯酚-硫酸光度法测定多糖的含量,番石榴叶、番薯叶中多糖的含量分别为10.94%、5.70%,为番石榴叶、番薯叶综合利用提供一定的理论依据。     

Greedy hot-potato routing on the two-dimensional mesh

Summary We propose hot-potato (or, deflection) packet routing algorithms on the two-dimensional mesh. The algorithms are strongly greedy in the sense that they attempt to send packets in good directions whenever possible. Furthermore, the routing operations are simple and independent of the time that has elapsed. The first algorithm gives the best evacuation time known for delivering all the packets to their destinations. A batch ofk packets with maximal source-to-destination distanced _max is delivered in 2(k-1)+d _max. The second algorithm improves this bound tok+d _max when all packets are destined to the same node. This also implies a new bound for the multitarget case, which is the first to take into account the number of in-edges of a node. The third algorithm is designed for routing permutations with source-to-destination distance at most three, in which case the algorithm terminates in at most seven steps. We also show a lower bound of five steps for this problem. Ishai Ben-Aroya received the B.A. and M.Sc. in computer science from the Technion (Israel Institute of Technology). He is currently working with Microsoft Israel R&D group. His main interests include Routing Algorithms, Cryptography and Computer Security. Tamar Eilam received the B.A. degree in Computer Science from the Technion IIL in 1995, and is currently studying towards her M.A. degree. Assaf Schuster received his B.A., M.A. and Ph.D. degrees in Computer Science from the Hebrew University of Jerusalem (the last one in 1991). He is currently a lecturer at the Technion IIL. His main interests include Networks and Routing Algorithms, Parallel and Distributed Computation, Optical Computation and Communication, Dynamically Reconfiguring Networks, and Greedy Hot Potato Routing.This work was supported in part by the French-Israeli grant for cooperation in Computer Science, and by a grant from the Israeli Ministry of Science. An extended abstract appeared in proc. 2nd European Symposium on Algorithms, September 1994     

紫色马铃薯薯条生产工艺的研究

以紫色马铃薯为原料,对丙烯酰胺含量低,色素保留较好的紫色马铃薯薯条生产工艺进行研究,得到最佳工艺为烫漂处理+微波真空冷冻。烫漂处理中最优护色剂组合为L-半胱氨酸浓度0.08%、柠檬酸浓度0.1%、氯化钙浓度125×10-6g/mL,浸泡时间10min;最佳烫漂温度70℃;烫漂时间5min。该工艺成品中未检出丙烯酰胺,色泽(E值)可降低到92.8739±5.3234。     

马铃薯全粉产品品质与生产控制

马铃薯全粉产品品质与生产控制紧密相关,在生产工艺中采用回填、调质等工序处理,能更好保全马铃薯风味物质和营养成分;应用科学方法去探索和提高工艺控制及生产控制水平,是全面提高马铃薯全粉品质保障。     

60Co-γ辐射对马铃薯淀粉特性的影响

采用60Co-γ射线对马铃薯淀粉进行辐照处理,辐照剂量分别为4、8、10、12、16kGy和20kGy,测定淀粉的颗粒特性及淀粉糊的透明度、热稳定性及冷稳定性。结果表明：辐照后的马铃薯淀粉颗粒形貌未发生明显变化、平均粒径变小;淀粉糊的透明度升高,峰值黏度减小,热稳定性及冷稳定性均显著提高。辐照剂量高于10kGy时,淀粉糊的峰值黏度与冷、热稳定性变化趋于平缓。     

混合试验仪Mixolab确定低成本 水晶粉丝配粉最佳配方

本文针对100%马铃薯淀粉制成的水晶粉丝成本高问题,采用新型的流变学检测仪器Mixolab混合试验仪,对目前市场上水晶粉丝的加工原料—马铃薯淀粉、鲜木薯淀粉和小麦淀粉三种不同淀粉的流变学特性进行测定,根据其不同的流变学特性,配以谷朊粉、复合增稠剂等辅料,得到不同配料间的差异性,优化产品配方,确定低成本粉丝配粉配方为马铃薯淀粉:木薯淀粉:小麦淀粉:谷朊粉:复合增稠剂为0.699:0.1:0.15:0.04:0.011,吸水率为58%。制作出来的粉条与100%马铃薯淀粉制成的粉丝相比,回生值较低,糊化温度较高,稳定性较好,蛋白含量较高,色泽相近,柔韧性较好,且生产成本下降。本文研究结果为实现低成本水晶粉丝的产业化提供理论依据。     

Application of Laminated Edible Films to Potato Chip Packaging

The effects of various stearic-palmitic acid blend concentrations in films, storage temperatures and storage times on potato chip quality were evaluated using Response Surface Methodology. Storage temperature and time affected the quality of potato chips. The maximum storage times for acceptable potato chip quality were: 30 to 43 days, 23 to 25 days, and 11 to 12 days for storage temperatures of 15, 25 and 35°C, respectively. Results were independent of stearic-palmitic acid blend concentrations.