呈味肽研究技术进展

呈味肽作为一种低聚肽,能提高食品风味,改善食品质构。目前的呈味肽主要分为甜味肽、苦味肽、酸味肽、咸味肽和鲜味肽。本文对呈味肽的分类和生产制备进行了综合介绍,以期为呈味肽的研究提供参考。     

小肽及其营养作用

本文系统地介绍了小肽,并就小肽在动物营养中的作用及其吸收机制进行了进一步的阐述,对于小肽的应用提供了理论依据。     

大豆降压肽研究进展

从高血压的形成机理,以及能够有效调节血压作用的ACE抑制肽的结构和功能入手,综述了食源性降压肽——大豆降血压肽的研究现状,提出了目前研究中需要解决的一些问题,阐述了大豆降压肽的开发价值和应用前景。     

小肽的营养价值及其应用研究进展

小肽一般是指二肽或三肽,小肽饲料就是通过化学或生物方法将本来不适合动物利用的蛋白原料分解,制成含有大量小肽的饲料产品。小肽饲料的营养价值在于小肽的吸收优势和其自身的质量。     

胶原蛋白肽粉的提取工艺

作为一种新兴的功能型蛋白配料,胶原蛋白肽近年来在国内外受到广泛关注,取得了快速发展。本文主要分析胶原蛋白肽的功能特性以及提取工艺,并提出未来胶原蛋白肽产品的发展趋势,以供相关企业参考。     

生物化学

一种抗氧化活性肽及其制备方法本发明公开了一种抗氧化活性肽及其制备方法,主要是将血红蛋白干粉溶于水中,然后用中性蛋白酶进行水解,再进行脱盐、浓缩、冷冻干燥等即可。本发明抗氧化活性肽抗氧化能力强;本发明纯度高,     

怀山药肽的开发及应用

本文主要综述了怀山药肽的加工工艺流程，怀山药肽的加工特性和生理功能特性，开发研究应用现状及发展前景。     

食品中生物活性肽的色谱分离

由蛋白质水解物所制备的活性肽类食品,具有易消化、易吸收、抗过敏、治疗低血压、降低胆固醇等多种特点和生理功能。随着各种活性肽的生理功能被逐渐发现和认识,加之这方面制品的加工制作更加法律化、制度化、标准化,消费者对活性肽制品会更加认识和接受,活性肽市场会日趋扩大,相信今后会有其他形式、其他功能的活性肽制品进入市场。     

米糠肽的功能活性及其蛋白的应用研究

随着科学的发展和各项研究的深入,在国际范围内,生物活性肽的研发均受到了广泛关注和重视,成为生物高科技领域研究的一个热点课题。米糠肽是一种肽混合物,具有丰富的营养,安全且容易被人体吸收,还具有降血压、降血糖、抗氧化、免疫、抗癌、抗疲劳、降胆固醇等生理活性,展现出较为广阔的应用前景。基于此,本文阐述米糠肽的功能活性,对米糠蛋白的成分进行概括,并对其在食品行业的应用现状进行综述。     

海洋生物酶解多肽的研究进展

海洋中蕴藏着丰富的生物资源,通过酶解可获得具有特殊功能和结构的生物活性物质,提供了重要物质来源。针对虾类、贝类、鱼类和其他海洋生物蛋白酶解物中的生物活性肽进行了综述,介绍了活性肽的国内外研究进展,为进一步开展海洋活性多肽研究提供了参考。     

脱毒菜籽多肽毒理学试验研究

本文对脱毒菜籽多肽的毒理学进行了研究,通过小鼠急性经口毒性试验、鼠伤寒沙门菌/哺乳动物微粒体酶试验、小鼠骨髓细胞微核试验和小鼠睾丸染色体畸变试验评价菜籽多肽的食用安全性。结果表明,脱毒菜籽多肽对雌雄两种性别的小鼠经口最大耐受剂量均大于15 g/kg·BW,按照急性毒性分级标准规定,该受试物属无毒级;与对照组比较,喂食脱毒菜籽多肽的小鼠经3项遗传毒性试验检测,结果显示均为阴性,表明脱毒菜籽多肽无急性毒性、无诱变活性和致突变作用。脱毒菜籽多肽具有良好的食用安全性,可以作为一种保健食品原料进行开发、利用。     

氨基酸在大脑中的代谢作用研究

氨基酸作为神经递质和神经调质,是中枢神经系统刺激神经组织中肽类、蛋白质和其他生物活性成分的基础物质。对可作为神经递质和神经调质的氨基酸种类进行了介绍,并综述了其在大脑中的特异性代谢,指出氨基酸在大脑中的代谢是中枢神经系统代谢机制的重要部分。     

阿联酋粮食战略储备项目工艺设计的先进性

阿联酋粮食战略储备项目规划总存储能力726 760 t,一期粮食存储能力为276 760 t。粮库分为稻谷仓和小麦仓,均为28 m直径钢筋混凝土筒仓,稻谷仓单仓仓容9 960 t,共6栋,小麦仓单仓仓容15 500 t,共14栋。以及与之配套生产附属设施,主要包括工作塔、汽车发放站、控制室、转接塔、输送栈桥等。进仓设备能力为1 200 t/h,出仓设备能力为600 t/h。     

From Adam Smith to the American Catholic bishops: Debating visions of economic life

Considerable controversy was stirred by the contrast between the specific approaches to public policy contained in the first draft of the Catholic bishops' letter on the U.S. economy and the policies favored by the Reagan administration. However, a much more basic contrast actually existed between the bishops' underlying vision of economic life and contemporary capitalism. The pastoral challenges a separation between moral criteria and economic activity that is deeply embedded in modernity itself. Indeed, the splitting off of economic life from its moral-religious matrix is seen by the bishops' critics as a positive, defining feature of democratic capitalism. The critics see the separate economic and moral-religious spheres related by due balance; the bishops, while acknowledging an autonomy to economic life, emphasize that its fundamental choices remain moral. The bishops (and, for different reasons, their critics) have preferred to minimize the contrast between the letter's vision and the contemporary economy. They avoid any clearcut judgment on the economic system by stressing pragmatism and reforms; but implicitly they are granting a strictly conditioned acceptance of reformist capitalism, the condition being the system's openness to questioning and change. Peter Steinfels is Editor of Commonweal Magazine and he is the author of The Neoconservatives (Simon and Schuster, 1979).     

CRITICAL STOCK PRICE NEAR EXPIRATION

We study the critical price of an American put option near expiration in the Black-Scholes model. Our main result is an estimate for the difference ( t )- K between the critical price at time t and the exercise price as t approaches the maturity of the option.     

江西森林碳储量空间分布特征及其价值分析

利用立木蓄积量、森林面积及森林土壤碳储量等基本监测数据,对江西省森林生态系统的碳储量和碳汇及其经济价值进行了估算。结果表明:江西省森林生态系统碳储量为1 286.37×106t,年碳汇能力为53.92×106t,其经济价值分别为3 923.429亿元和164.47亿元,江西省森林生态系统平均碳密度为147.57 t/hm2。预计江西省年2010年到2020年间森林生态系统碳汇潜力278.09×106t碳或1 020.59×106t CO2,由此产生的经济效益平均每年可达53.01亿元。同时还对江西省11个市的森林碳储量、碳汇及其经济价值进行了估算,得出了全省各市森林生态系统碳储量和空间分布特征以及各地的森林碳汇林地价格。     

Export Entry,Export Exit and Productivity in German Manufacturing Industries

This paper contributes to the flourishing literature on exports and productivity by using a unique newly available panel of exporting establishments from the manufacturing sector of Germany from 1995 to 2004 to test three hypotheses motivated by a theoretical model by Hopenhayn (Econometrica 1992): (H1) Firms that stop exporting in year t were in t?1 less productive than firms that continue to export in t. (H2) Firms that start to export in year t are less productive than firms that export both in year t?1 and in year t. (H3) Firms from a cohort of export starters that still export in the last year of the panel were more productive in the start year than firms from the same cohort that stopped exporting in between. While results for West Germany support all three hypotheses, this is only the case for (H1) and (H2) in East Germany.     

纳米二氧化钛生产的工艺与设备(二)

洗涤过滤的主要原理是利用偏钛酸的水不溶性与杂质离子的水溶性进行液固分离。介绍了几种常用的洗涤过滤设备,通过对各种设备的比较,提出了500 t/a和1000 t/a两种规模工业生产的洗涤过滤方式:500 t/a规模采用多孔陶瓷膜洗涤、隔膜压滤机过滤,1000 t/a规模采用隔膜压滤机或摩尔过滤机一次洗涤、摩尔过滤机二次洗涤或摩尔过滤机二级水洗工艺,并对主要设备的选型进行了计算。     

EC Competition Law After Modernisation: More than Ever in the Interest of Consumers

In this paper it is argued that even though the consumer cannot (anymore) be reduced to a homo oeconomicus, competition law is the cornerstone of consumer law and that the decentralised application of EC competition law since 1 May 2004 (pursuant to Regulation 1/2003) gives new opportunities for an effective application of the EC competition rules to the benefit of consumers. While the EC Treaty (and the future Constitution for Europe) aim to protect consumers in the framework of the internal market programme, as well as on the basis of a genuine consumer protection policy, it is submitted that an effective competition policy remains crucial for consumers in a market economy. Consumer interests are generally diffuse and therefore difficult to protect via legal procedures. Nevertheless a further development of remedies which are already available in Community law (nullity of restrictive agreements, claims for damages, actions for a cease and desist order, and so on) will contribute to an increased application of the competition rules in the interest of consumers.