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1.
用吲哚指标评定虾产品鲜度的研究   总被引:4,自引:0,他引:4  
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2.
萜酸钠盐(Verva)是从西伯利亚冷杉中提取的植物萜类化合物,落叶松酸是从落叶松中提取的植物黄酮类化合物,都是新型纯天然的植物生长剂。据此,主要对其在亚麻纤维生长、发育及其产量方面的作用进行检测,并对植物生长激素(吲哚三乙酸、脱落酸、玉米素和玉米素核苷酸)的激素水平进行了研究。在田间开展植物生长剂对亚麻纤维的增产实验。通过工业实验证明,VERVA对提高亚麻杆茎、种子和亚麻纤维产量具有显著作用。  相似文献   

3.
介绍用作者自行制备的吲熟酯为主要成份,根据不同作物的生长飞性及生理活性,选择不同的助剂配制成的柑桔催熟增甜剂FT-80和西瓜催熟增甜剂HW-1的田间试验情况。  相似文献   

4.
沈久明 《化工科技市场》2006,29(10):35-35,44
以1-苯基-3-甲基-5-吡唑啉酮与苯甲酰氯进行的反应,探讨了合成高产率吡唑啉酮衍生物的简易方法,并通过TLC对产物进行了初步鉴定.  相似文献   

5.
探讨了生产某些合成染料、药品和农药所需的中间体1,3-二甲基-吡唑啉酮〔5〕的合成方法。采用甲基肼为原料合成了产物,并研究了反应温度、物料的滴加速度和馏水量对产物收率的影响。  相似文献   

6.
异丁醛的生产技术与应用   总被引:1,自引:0,他引:1  
本文概述了异丁醛的生产技术、市场现状及戍用领域,并对我国异丁醛的发展提出了建议。  相似文献   

7.
浅析异业营销协同效应   总被引:1,自引:0,他引:1  
随着市场竞争日趋激烈,为了满足企业生存和发展,越来越多的企业通过异业营销的方式寻求整合过程中的协同效应,以获得竞争优势。本文从异业营销的角度探讨异业企业在整合过程中产生的协同效应,构建了基于柯布一道格拉斯生产函数的协同效应判断模型,并对异业营销中协同效应的实现和提高进行探讨。  相似文献   

8.
邻菲啰啉可与Fe3+和Fe2+结合形成不同颜色的金属配合物。利用亚硫酸对Fe3+离子的还原作用,使邻菲啰啉-Fe3+配合物转化为邻菲啰啉-Fe2+,产生显著的光谱变化,据此建立测定亚硫酸盐的光谱分析法。研究结果显示,在pH5.00的乙酸钠-乙酸缓冲溶液中,亚硫酸盐的加入使体系在510 nm处的吸光度显著增强,在一定浓度范围内510nm处吸光度的增加值与亚硫酸盐浓度呈良好线性关系,其线性范围为1.08×10-6-1.60×10-5mol/L,检测限为1.08×10-7mol/L。本方法用于测定饼干中的亚硫酸盐,回收率为92.2%-101.8%。  相似文献   

9.
国内外甲基异丁基酮生产与市场分析   总被引:1,自引:0,他引:1  
2006年世界甲基异丁基酮生产能力约为392.5 kt,主要用于溶剂和橡胶助剂领域,2006年国内甲基异丁基酮生产能力为15 kt,需求量约为47.7 kt左右.本文介绍国内外甲基异丁基酮生产现状、市场需求,重点分析国内甲基异丁基酮供求现状,目前我国已成为甲基异丁基酮主要消费国.并对我国甲基异丁基酮工业发展提出一些建议.  相似文献   

10.
共享经济将会是一个大趋势,异业联盟是共享经济的一种表现形式,我国的商家纷纷采用异业联盟的形式来减轻成本同时进行联盟间的资源共享。为了解异业联盟现状及异业联盟过程中存在的问题,本文以温州茶山高教园区异业联盟商家为研究样本,在调研了解其异业联盟基础上,深入分析了异业联盟商家的现状,从中发现了异业联盟的发展和其存在的一些不足,并提出相关建议与对策。  相似文献   

11.
《马桥词典》用词典的形式构造了马桥的文化和历史,用生动、鲜活的方言口语营造出一个遗世独立、魅力十足的“马桥世界”。在这个世界里,有乡村特有的生活规范和法则;有他们独特的思维方式和价值观念;有朴素的乡土人情和神秘、奇特的民俗民风;有民间社会固有的保守、愚昧、落后、贫穷和等级观念;也有顽固的传统文化,心理和集体无意识,还有他们独立自信的民间精神。这个具有原生态色彩的“马桥世界”,实际上是一个乡土中国的缩影,它让我们看到了中国的“马桥”,看到了世界的中国。  相似文献   

12.
为了保护消息广播中节点关系、地理位置等敏感信息,将高效的NTRU(Number Theory Research Unit)公钥加密算法与不经意传输协议相结合,通过引入不可信的第三方以保证广播的中间过程无法被任意节点所获知,从而实现了隐藏网络拓扑结构的目标。该协议可认为是拓扑隐藏广播的具体实现,解决了现有概念性方案中尚未涉及的秘钥重构、相邻节点身份隐藏及网络动态变化等问题。安全性分析表明,在半诚实攻击模型下该方案能够保证网络中任何一部分节点被攻破均不会导致其他节点拓扑信息泄露。此外,通过与相关概念性协议进行实验对比分析,该方案除安全性外还可充分体现计算、通信开销与节点平均度数无关的优势。  相似文献   

13.
The recent economic crisis as well as other disasters such as the oil spill in the Gulf of Mexico or the nuclear disaster in Japan has fanned calls for leaders who do not deny responsibility, hide information, and deceive others, but rather lead with authenticity and integrity. In this article, we empirically investigate the concept of authentic leadership. Specifically, we examine the antecedents and individual as well as group-level outcomes of authentic leadership in business (Study 1; n = 306) as well as research organizations (Study 2; n = 105). Findings reveal leader self-knowledge and self-consistency as antecedents of authentic leadership and followers’ satisfaction with supervisor, organizational commitment, and extra-effort as well as perceived team effectiveness as outcomes. The relations between authentic leadership and followers’ work-related attitudes as well as perceived team effectiveness are mediated by perceived predictability of the leader, a particular facet of trust. We discuss the implications of our findings for theory and practice and provide suggestions for advancing theory and research on authentic leadership in the future.  相似文献   

14.
The widespread use of social media as a marketing tool during the last decade has been responsible for attracting a significant volume of academic research, which, however, can be described as highly fragmented to yield clear directions and insights. We systematically synthesize and critically evaluate extant knowledge of social media marketing extracted from 418 articles published during the period 2009–2021. In doing so, we use an organizing framework focusing on five key areas of social media marketing research, namely, social media as a promotion and selling outlet, social media as a communication and branding channel, social media as a monitoring and intelligence source, social media as a customer relationship management and value cocreation platform, and social media as a general marketing and strategic tool. Within each of these areas, we provide important theoretical, methodological, and thematic insights, as well as future research directions. We also offer useful managerial implications derived from the articles reviewed.  相似文献   

15.
Germany and Canada differ significantly regarding their migration policy as well as the structures of the national labour markets and their educational systems. This paper aims to analyse how these differences affect the labour market outcomes of immigrants and the usability of foreign qualifications and work experiences by using the health and ICT sectors as example. The comparison focuses on the question how qualifications and work experience serve as signals and are screened for in the recruiting process of enterprises. The results show clear differences as well as several commonalities between the two compared countries.  相似文献   

16.
本文从分析货币政策的规则和相机抉择之争入手,分析通货膨胀目标制作为名义锚在货币政策中的作用与政策含义,在此基础上探讨如何有效地设计和实行通货膨胀目标制。本文认为,我国货币政策在向通货膨胀目标制过渡过程中,要明确货币政策和汇率政策的主从地位,增强中央银行的独立性以及对宏观经济的分析和预测能力,解决中央银行承担最后贷款人义务而造成的通货膨胀隐患,建立核心通货膨胀指标。  相似文献   

17.
Entrepreneurship has been gaining increasing respect from the research community as a field of scholarly study as well as practical application worldwide as a means to achieve wealth creation and personal fulfillment. Yet, entrepreneurship, as a theoretical construct and practical phenomenon, remains poorly defined and its interpretation fragmented. This article attempts an eclectic account of the major ingredients of entrepreneurship and dissects the entrepreneurship process through a parsimonious 4-P framework: pioneer, perspective, practice, and performance. It is expected that this framework will help us better understand the essence of entrepreneurship: its theoretical underpinnings as well as its practical implications.  相似文献   

18.
East Asian nations, which not long ago were counted among the more backward, are emerging as dramatically expanding markets as well as tough competitors for the United States. Predictions are that the Pacific-rim economy will expand twice as fast as the rest of the world. Professor Jens Biermeier shows that there has been a shift in the trading pattern of the United States away from Europe towards Asia as well as a shift of US political and strategic interests from the Atlantic to the Pacific in recent years.  相似文献   

19.
十八大之后,面对复杂多变的国际新局势,以习近平同志为总书记的党中央运筹帷幄,高屋建瓴地提出一系列对外战略思想并付诸实践.具体包括四个方面:丰富和发展了一个“命运共同体”的总体目标;认真做好两手装备,把握战略机遇期所蕴含的机遇,沉着冷静应对挑战;处理好三个平衡,即争取维护国家利益与承担国际责任的平衡、维持软实力和硬实力的平衡以及坚持韬光养晦与有所作为的平衡;妥善处理中国与大国、周边国家、发展中国家以及国际组织的四对关系.可以说,十八大后的中国外交事业开局扎实,取得了令人瞩目的成就,从而推动了中国向“负责任大国”的方向迈进.  相似文献   

20.
In the past 10 years Iran has been emerging as a major car producer in the world. However, due to delays in economic reforms, Iranian car exports have not increased as much as production. This paper presents a first estimation of the Iranian export potential in the car industry. Based on new theoretical developments of the gravity equation, an empirical bilateral trade model is proposed. It includes sectoral variables (car production, import tariffs), as well as other original variables, such as expectations and hysteresis. We then develop a dataset which includes the 40 major car‐exporting countries in the world, 34 importing countries, a 10‐year time period as well as four car production groups. The model is then estimated by using alternative panel data estimators, such as those of Hausman and Taylor and dynamic estimators as well as transformed variables estimators. Export potential is finally calculated from the residuals of the model. Results show that Iranian current car exports are about 100 times less than their fitted values. This indicates that there is a significant export potential for Iran, especially toward India, China, Russia, as well as smaller neighbours (Turkey, Pakistan, Central Asian countries). As a result, Iran could become the major auto supplier in the Middle East. However, this requires the completion and success of ongoing economic reforms.  相似文献   

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