边缘路线信息丰裕度对消费者在线购买决策的影响

本文以详尽可能性模型(ELM)为框架构建边缘路线信息丰裕度对消费者在线购买决策的影响模型,揭示不同边缘路线信息丰裕度对消费者购买决策的影响机理。结果表明,卖方信誉信息丰裕度、买方评论信息中的评价条数和评价截图丰裕度、支持性服务功能(SSF)中的正品保障信息丰裕度均与消费者购买意愿或购买行为正相关,促销信息丰裕度与购买意愿正相关,而与购买行为相关性不显著。另外,商品详情丰裕度、买方评论信息中的评价分数丰裕度以及SSF中的提供发票和七天退货等信息丰裕度与消费者购买决策相关性不显著。研究结论为第三方网络交易平台以及网上卖家提供了通过边缘路线设计将潜在消费者变为现实消费者的实证依据。     

紫外分光光度计法检测发酵面团中清球蛋白含量

以小麦粉、酵母菌和植物乳酸菌M616(Lactobacillus plantarum M616)为原料制备酵母发酵面团、乳酸菌发酵面团和混合发酵面团,分别利用紫外分光光度法和凯氏定氮法测定面团发酵过程中清球蛋白含量。检测结果表明,两种方法测得发酵面团中的清球蛋白含量经多重比较均无显著差异(P0.05)。乳酸菌发酵面团和混合发酵面团发酵过程中,清球蛋白含量随着发酵时间的延长显著下降,而酵母菌发酵面团发酵过程中,清球蛋白的降解较少。因此紫外分光光度法可用于发酵面团中清球蛋白含量的测定。     

试论食品生化技术在发酵工程中的应用

简单介绍了食品生化技术的定义和分类及生化技术对发酵工程等技术工程产生的重要影响,以使其在食品发酵生产过程中的应用愈加广泛.     

发酵酒精中异丙醇的产生及分离研究

[目的]寻找发酵酒精产生异丙醇的原因及规律及与乙醇分离的可能性,进而找到减少或排除酒精中异丙醇的工艺途径.[方法]利用毛细管柱气相色谱法对发酵酒精生产中不同发酵条件(菌种、时间)、不同原料以及成品管道内的异丙醇含量进行了跟踪,探讨了异丙醇/乙醇分离可能性.[结果]不同菌种、不同发酵时间未见异丙醇产生量发生变化;粮谷类和农副产品原料(发醇)未产生异丙醇,薯类原料则因不同产地而产生的异丙醇量不同;常规蒸馏后排废液中未检出异丙醇.[结论]异丙醇的产生量与发酵菌种、时间无关,与原料种类、即薯类原料及其种植地有关;常规蒸馏工艺不能排除酒精中的异丙醇.     

奶啤生产过程中影响产品质量的因素及控制措施

探讨了影响牛奶啤酒生产过程的因素及控制措施。(1)原料奶前处理步骤的影响因素:微生物、原料乳抗生素。控制措施:控制杀菌温度和时间、小样快速发酵检测抗生素。(2)配料过程的影响因素:原料乳配料过程发生浑浊、悬浮、异味及沉淀等现象。控制措施:控制好配料比例,避免微生物污染。(3)发酵过程中的影响因素:菌种的扩繁和接种、发酵条件、微生物。控制措施:选育优良菌种,控制发酵温度和时间。(4)灌装、包装过程中的影响因素:温度和压力不合适,导致杀菌不彻底,影响产品保质期。控制措施:调整灌装温度和压力,控制杀菌温度和时间。     

Foreign investors share dumping has little impact on Chinese banks

China＇s national government pension fund,the Social Security Fund（SSF）,reported its first annual loss since its founding eight years ago,losing 6.79 percent on its investments in 2008.     

发酵黑豆的功能与营养成分

本文对发酵黑豆(黑纳豆)的功能成分从化学性质、应用前景两方面进行了分析,并指出我国对发酵黑豆的生产水平有待提升,同时该产品的市场前景十分广阔,为利用发酵黑豆研制出抗衰老、抗癌等方面的保健食品提供了依据。     

食品发酵中微生物的作用

微生物是食品发酵的重要因素,本文介绍了微生物在食品发酵中的早期应用,并深入分析了食品新技术和微生物防止方面的应用,为提高食品发酵中微生物活力奠定良好基础。     

美酒篇--葡萄佳酿如此成

世界各地酿制红酒的程序大多都是去梗,压榨,再将果肉、果核、果皮统统装进发酵桶中发酵,这些发酵桶都需要先用低剂量的二氧化硫处理,以预防微生物污染.勃艮第一些酿酒师要留梗,他们认为这样可以给葡萄酒添加组成.葡萄汁在大缸中发酵生成酒精的同时,果皮和果肉经过在葡萄汁中的浸泡(和烹饪的腌泡差不多),5-7日便释出葡萄酒的色素和耐久的劲力(劲度).     

乳酸菌在辣椒酱发酵中的应用

发酵食品因其特殊的风味和营养而风靡世界,引起了人们的广泛关注。辣椒酱是中国传统辣椒制品的重要组成部分,随着农产品加工新技术及乳酸菌研究的逐步深入和发展,纯种发酵辣椒酱成为一个新的研究热点。本文从辣椒酱发酵过程中菌种的筛选、辣椒的选择、加工工艺和发酵条件等方面,阐述了乳酸菌在辣椒酱发酵中的应用现状,分析了菌种组成、发酵条件和加工工艺等对辣椒酱口味、质量和安全的影响,为乳酸菌在辣椒酱生产中的应用提供参考。     

Informed trading around earnings announcements—Spot,futures, or options?

Recent literature reports higher single stock options (SSO) volume before earnings announcements (EA). There are no studies that explore single stock futures (SSF) in this context because of illiquid SSF markets in developed countries. Similar to SSO, SSF provide embedded leverage and facilitate short selling although at a lower cost, but do not provide downside-risk protection. India’s liquid SSO and SSF provide a unique setting to study the preference of informed traders. We observe an increase in both SSO and SSF volume before EA. Further, SSF dominate SSO possibly due to SSO becoming expensive before EA and higher information leakage in India.     

Are single stock futures used as an alternative during a short‐selling ban?

The response of the single stock futures (SSF) market to a short‐selling ban is investigated. The hypothesis is that traders use SSF as a substitute instrument for short‐selling. A significant increase in SSF trading activity is documented, accompanied by narrower spreads. SSF market volatility did not react during the ban, which suggests that the increased trading activity did not weaken SSF market quality. The quality of the underlying market during the ban period is also assessed, with the results suggesting that changes in SSF market activity had neither positive nor negative effects on the stocks’ liquidity, volatility, and volume.     

利用生物发酵法生产黄腐酸类物质

利用生物发酵法生产黄腐酸类物质，尚处在开发探讨阶段，本文作者结合自己几年来开发利用生物黄腐酸类物质的体会，对生物发酵法生产黄腐酸类物质技术的生物化学理论基础，发酵工艺条件的优化以及黄腐酸类物质的抽提等进行了粗浅的探讨。     

红枣枣醋发酵工艺的优化

以新疆"哈密大枣"为原料,结合现代醋酸发酵技术制作冬枣枣醋,对枣醋发酵温度、醋酸菌接种量、初始酒精度和初始pH值4个影响因素进行分析,探讨冬枣枣醋最佳发酵条件,试验结果表明:当发酵温度为30℃,醋酸菌接种量为3%,酒精度为6%,初始pH为3.0时,15 d时醋酸含量达到5.76 g/100 mL。     

柑桔果醋饮料的生产工艺研究

柑桔果醋饮料是新一代健康饮品,它是运用现代生物技术,经酒精发酵、醋酸发酵加工而成。本文讨论了柑桔果醋饮料的加工工艺及操作要点。     

食品中白色念珠菌的检测工艺

白色念珠菌是一种常见的真菌病原体,用不同的培养基对白色念珠菌进行培养时,它所展现的菌落特征与其他酵母存在很大差别。在显色培养基上白色念珠菌菌株呈蓝绿色,并且能够产生后垣孢子与芽管,在葡萄糖与麦芽糖发酵试验中能产酸产气,在蔗糖发酵试验中只产酸不产气。实验数据表明,将10个左右的白色念珠菌放入到100μL样品中,白色念珠菌能够被显色培养基检测出来。     

微生物发酵法生产L-色氨酸的研究进展

依据国内外利用微生物发酵法生产L-色氨酸的研究报道,本文系统归纳了L-色氨酸的理化性质、应用及其主要生产方法的研究进展,重点介绍了L-色氨酸高产菌株的选育与发酵优化的研究现状,为工业化生产提供一定依据。     

Applying the Extended Theory of Planned Behavior to Predict Sustainable Street Food Patronage in a Developing Economy

With over 2.5 billion daily street food consumers globally, the consumption paradigm of the urban-informal-sector street food is shifting towards sustainable street food (SSF). This has led to the emerging SSF-market segment. The extended Theory of Planned Behavior (e-TPB), which incorporates the past behavior construct, is used to provide preliminary insight by unraveling behavioral predictors. The e-TPB research framework is premised on five key constructs - attitude, subjective norm, perceived behavioral control and past behavior. The framework was tested using primary data collected from 437 street food consumers drawn from three main urban cities in southeast Nigeria. Structural Equation Modeling (SEM) technique was used to analyze data. It is revealed that past behavior/experience does not necessarily connote patronage intention for sustainable street food. This study validates the utility of e-TPB for the prognosis of emerging consumer behavior. Recommendations and implications for marketing-related street food vending strategies are discussed.     

乳酸的现代应用研究及其生产概述

乳酸是目前世界上公认的三大有机酸之一,它广泛应用于食品、医药、化工、制革、纺织、环保和农业等诸多领域,应用前景十分广阔。因此对L-乳酸的研究越来越引起人们的重视。乳酸的生产方法主要有化学合成、酶法合成和发酵生产等,我国多采用发酵法为主。     

Impact of Liquidity on the Futures‐Cash Basis: Evidence from the Indian Market

Arbitragers’ activities are constrained by market liquidity. In turn, arbitrage activity may trigger order imbalances adversely affecting liquidity. We examine this issue by analyzing the link between the futures‐cash basis and bid–ask spreads using intraday data on single stock futures (SSFs) contracts on Indian stocks. In contrast to other countries, the SSF market in India is very active due to retail investors’ prior experience with the badla system, a form of forward markets. The analysis reveals two‐way Granger causality between the basis and spreads in both the futures and cash markets. Evidence for spreads Granger‐causing basis is stronger for stocks with higher volume and SSFs that are relatively more active than underlying stocks. © 2012 Wiley Periodicals, Inc. Jrl Fut Mark 33:266–298, 2013