Production of green surfactants: Market prospects     

《Electronic Journal of Biotechnology》2021

Science has greatly contributed to the advancement of technology and to the innovation of production processes and their applications. Cleaning products have become indispensable in today’s world, as personal and environmental hygiene is important to all societies worldwide. Such products are used in the home, in most work environments and in the industrial sectors. Most of the detergents on the market are synthesised from petrochemical products. However, the interest in reducing the use of products harmful to human health and the environment has led to the search for detergents formulated with natural, biodegradable surfactant components of biological (plant or microbiological) origin or chemically synthesised from natural raw materials usually referred to as green surfactants. This review addresses the different types, properties, and uses of surfactants, with a focus on green surfactants, and describes the current scenario as well as the projections for the future market economy related to the production of the different types of green surfactants marketed in the world.How to cite: Farias CBB, Almeida FCG, Silva IA, et al. Production of green surfactants: Market prospects. Electron J Biotechnol 2021;51. https://doi.org/10.1016/j.ejbt.2021.02.002  相似文献   

Digital Module 09: Sociocognitive Assessment for Diverse Populations https://ncme.elevate.commpartners.com     

Robert J. Mislevy  Maria Elena Oliveri 《Educational Measurement》2019,38(4):110-111

  相似文献   

粤港澳大湾区跨境体育消费实证研究* ——以广东居民赴香港参加体育赛事为例     

王淋燕  周良君  李洋洋  丘庆达 《广州体育学院学报》2020,(5):1-8

粤港澳大湾区以其独特的地理优势，在国家发展大局中具有重要的战略地位。采用问卷调查、深度访谈和中介效应分析等方法，选取广东居民赴香港参加体育赛事者为调查对象，了解两岸居民参与体育赛事受到哪些因素的影响及其影响程度，帮助相关部门企业制定合理策略促进两岸体育爱好者交流及地方经济增长，同时进一步拓展了跨境消费行为研究,特别是跨境体育消费研究。结果显示，赛事产品因素及相关吸引因素对个人态度及行为意愿具有重要影响，而经济因素和交通因素对于跨境体育消费者的决策影响十分有限。通关因素、货币汇率因素对跨境参加体育赛事影响不明显。  相似文献   

线上线下混合式教学模式在“药物分析”教学中的应用探索     

韦林洪  丁娟芳  于智勇 《扬州教育学院学报》2020,(1):84-86,91

线上线下混合式教学是传统教学和信息化教学相结合的一种新型教学模式,它克服了传统教学“满堂灌”的现象,能够调动学生学习的积极性、主动性和创造性,受到教育工作者的广泛关注。本文从线上线下混合式教学的设计与组织、教学过程的质量监控、教学评价体系的构建和教学反思四个方面探索了线上线下混合式教学模式在“药物分析”教学中的应用与实践,为高职院校线上线下混合式教学的应用提供思路。  相似文献   

一次性塑料快餐盒盖成型工艺分析及逆向设计     

吕淑艳 《包头职业技术学院学报》2020,(1):1-2,15

采用逆向思维方法,详细分析了一次性快餐盒盖的成型工艺,并对其结构进行改进设计。为那些以实物为制造基础的产品的设计提供了借鉴,在缩短产品开发周期,提高经济效益方面,起着重要作用。  相似文献   

高职院校农业类专业课程教学改革的实践与反思     

哈满林  李萍  黄守敏 《安徽职业技术学院学报》2020,(1):88-91

文章针对高职农业类专业学生类型结构趋向多元化、教学内容与生产实际相脱离、教学团队的结构亟待优化、教学组织形式亟待改进等突出问题,通过对岗位职业能力、工作任务进行梳理,重构教学内容,改进教学方法,组建结构化教学团队,会同行业专家共同开发活页式教材,使教学过程可控、课堂活力提升,显著改善了教学效果。  相似文献   

A qualitative investigation of design knowledge reuse in project-based mechanical design courses     

Dónal P. Holland  Conor J. Walsh 《European Journal of Engineering Education》2019,44(1-2):137-152

ABSTRACT

The interpretation and reuse of previous design solutions, or precedents, is central to design. This paper describes qualitative research conducted over three years at two institutions, aimed at investigating the role of design knowledge re-use in project-based mechanical design courses. Research data were collected through participant observation, student interviews, anonymous questionnaires, and website analytics. The paper identifies challenges that must be addressed in order to support novice engineers in rehearsing the types of knowledge required to successfully reason about and engage with design precedents. Two categories of design precedents are identified: concept precedents and detail precedents. Providing students with access to the latter is identified as a particular challenge, as is providing students with access to engineering communities of practice. Approaches to addressing these challenges are discussed.  相似文献   

基于用户需求分析的高校图书馆专利服务设计研究——以山东理工大学知识产权信息服务中心为例   总被引：1，自引：0，他引：1  

吴红  李昌  伊惠芳  韩盟  冀方燕 《图书情报工作》2019,63(20):74-81

[目的/意义]高校图书馆的核心价值首先是服务与需求保持高度一致。研究如何扬长避短、契合需求、多元化、多方位实施专利服务，对高校图书馆提高服务绩效、彰显使命担当具有重要意义。[方法/过程]在分析用户需求及服务设计的基础上，以山东理工大学知识产权信息服务中心专利服务实践为例，从普及与提高相结合的专利素质教育、有所为有所不为的专利科研服务、面向产学研政的情报分析与决策支持服务三个维度，探讨高校图书馆的专利服务定位、服务内容以及服务模式。[结果/结论]"高质量满足用户需求"是高校图书馆专利服务工作的着力点。图书馆要有效开展专利服务工作，合理定位是准绳，专业人才是支撑，专利教育是重点，有效机制是保障。  相似文献   

Data Visualization as Participatory Research: A Model for Digital Collections to Inspire User-Driven Research     

A. Miller 《Journal of Web Librarianship》2019,13(2):127-155

The emerging creative practices of digital collections are increasing in prominence thanks to the access to, and appeal of, data visualizations. Interactive data visualizations, such as a map, timeline, chart, graph, or artist’s rendering of data, enable users to pursue their own research interests within a collection and participate in new areas of research. Use of these data visualizations enhances the scope of the collection and enables a modern and diverse thematic collection to emerge. This article considers the question: Does the addition of data visualizations affect how users participate with a research collection? Impacts on collection development, application of user-centered design, and analysis of users’ exploratory strategies are discussed. Examples of data visualizations used in digital humanities projects and digital collections are presented as case studies.  相似文献   

指向武术核心素养的中小学武术有效教学策略与方法设计     

柴广新  孙有平 《武汉体育学院学报》2020,54(4):87-92

为了有效促进学生武术核心素养的培育,针对我国武术教学中存在套路内容“繁难”、教法单一、重“形”轻“击”、重知识灌输,轻自主性培养、重教师的“教”,轻学生的“学”“学生不喜欢武术课”等一系列问题,提出了有效促进武术认知、武术运动能力、武术人格培育的原则,基于此原则,对“化难为易”策略、“化浅为深”策略、“化无趣为有趣”策略、“化技术为实践”策略、“知新温故”等策略进行了具体探索性设计,并对上述策略的具体实施方法进行了阐述,为中小学武术教学改革提供现实指导。  相似文献