Results 71 to 80 of about 10,402 (168)

Clone、construction and expression of Synechocystis sp.PCC 6803 Acetyl- CoA carboxylase gene for fat production [PDF]

open access: yes, 2016
在化石燃料日益枯竭、环境污染逐渐威胁人类生存的今天,生物柴油在提供可再生能源的同时还可以减少温室气体,从而受到世界各国的广泛重视。蓝藻为光合自养微生物,是大气碳循环主要贡献者,其生物柴油产量是油料作物的8~24倍。乙酰辅酶A羧化酶(acetyl-coenzymeAcarboxylase,ACCase)是生物体内脂肪生物合成的关键酶,研究发现,过量表达ACCase能够促进生物体脂肪的合成。相对于蓝藻,大肠杆菌具有遗传背景清楚、生长速度快等特点 ...
周赞虎
core  

Generation Z's green purchase behavior: Do green consumer knowledge, consumer social responsibility, green advertising, and green consumer trust matter for sustainable development?

open access: yesBusiness Strategy and the Environment, Volume 33, Issue 5, Page 4530-4546, July 2024.
Abstract Generation Z (Gen‐Z), representing a demographic cohort of persons born from 1995 to 2010, has demonstrated their concerns for environmental protection. On September 20, 2019, for example, millions of Gen‐Zs from over 150 different countries across the globe embarked on a protest to pressure decision‐makers and governments to help save the ...
Prasad Siba Borah   +2 more
wiley   +1 more source

More problems sampling wildlife with baits: Environmental food resources influence trapping rates 使用诱饵进行野生动物采样的若干问题:环境中的食物资源会影响诱捕率

open access: yesWildlife Letters, Volume 2, Issue 2, Page 83-89, June 2024.
In this study, we show that environmental food availability influences wildlife detection probability when using food baits. We sampled small mammals in Borneo with live traps baited with fruit before, during and after the rainforest experienced a mast fruiting event, which drastically altered environmental food availability.
Bastien Dehaudt   +3 more
wiley   +1 more source

跨海集群工程节能减排关键技术研究 [PDF]

open access: yes, 2017
港珠澳大桥跨海集群工程囊括跨海桥梁、沉管隧道、离岸人工岛等多个领域。跨海集群工程由于建设期及运营期能耗巨大,国内外尚无节能减排的成套技术指导工程建设,成为制约跨海集群工程持续发展的瓶颈之一。本文依托港珠澳大桥跨海集群工程建设和运营过程,采用理论研究、数值分析及模拟测试等多种方法,开展了集群工程节能减排指标体系和长大沉管隧道通风、照明、人工岛运营节能减排关键技术研究 ...
刘建昌   +4 more
core  

Fungal systems for lignocellulose deconstruction: From enzymatic mechanisms to hydrolysis optimization

open access: yesGCB Bioenergy, Volume 16, Issue 5, May 2024.
Biomass contains complex sugars and aromatic polymers that have the potential to serve as sustainable alternatives to fossil fuels and chemicals. Fungi possess specialized enzyme systems capable of breaking down lignocellulose into fermentable building blocks. This review analyses recent advancements in intricate fungal decomposition toolkits, shedding
Fengyun Ren   +5 more
wiley   +1 more source

Pricing Analysis and Policy Choice of Renewable Energy Electricity In China [PDF]

open access: yes, 2012
在制定可再生能源电力价格时,必须考虑其特殊性。一方面,由于目前技术水平的限制,在不考虑化石能源的环境成本情况下,可再生能源发电(水电除外)成本基本上都高于常规能源。另一方面,更为重要的是,可再生能源的开发利用对资源和环境的影响远小于化石能源。在当今全球油价不断上扬、能源供应日趋紧张、环境恶化日益明显的今天,可再生能源作为对化石能源的替代,优势更加明显。在制定可再生能源的价格时,必须考虑其较高的发电成本和较低的环境代价。现阶段,我国发展可再生能源,必须借鉴国外发达国家各种成熟的定价政策 ...
张群洪
core  

Study on reductive amination of biobased levulinic acid [PDF]

open access: yes, 2016
乙酰丙酸是重要的生物基平台化合物,其转化利用受到科研工作者的广泛关注。乙酰丙酸的还原胺化是制备高附加值乙酰丙酸胺化衍生产品的重要途径,近年来成为研究的热点。本论文建立了无催化剂乙酰丙酸还原胺化的反应体系,探讨了乙酰丙酸还原胺化合成直链氨基酸4-二甲氨基戊酸(4-DAPA)和环状化合物5-甲基-2-吡咯烷酮(5-MeP)的反应途径。 首先,研究了以N,N-二甲基甲酰胺为胺源,在无催化剂条件下直接还原胺化乙酰丙酸合成新型化合物4-二甲氨基戊酸(4-DAPA)的反应途径。在200℃条件下反应4h,4 ...
王彦钧
core  

Control strategy research for PV DC microgrid with hybrid storage system [PDF]

open access: yes, 2016
以光伏、风电等可再生能源为主的分布式发电技术因为其随机性、不稳定性,对配电网潮流改变带来的安全性等问题,其发展得到一定的制约。微电网被广泛认为是解决分布式发电技术应用瓶颈的有效解决方案,而直流微电网以直流形式传输电能,控制结构简单,不需考虑频率和相位,系统损耗小,效率高,也更加适合越来越多的直流电器的接入,因此具有很强的推广实用价值。本文在研究了直流微电网的国内外研究发展现状、架构,以及包括控制技术、储能技术、保护技术等关键技术基础上,对包含有蓄电池和超级电容器在内的光伏直流微电网系统进行了研究 ...
杨贇
core  

美国国家氢能计划及其启示 [PDF]

open access: yes, 2015
通过对美国国家氢能计划的发起及发展历程、组织管理模式、科研体系、实施流程及评估过程进行考察与分析,探讨以政府为主导的应用性科研规划的特征及成功经验 ...
刘益东, 王彦雨, 高璐
core  

Research progress in Li-ion battery pack inconsistency control [PDF]

open access: yes, 2017
总结电池均衡、成组方式和热管理的研究方法及问题。电池均衡技术主要有电池均衡电路、电池均衡控制策略;电池成组方式主要有电池串并联方式、电池连接阻抗;电池热管理主要有电池生热特性 ...
冯自平, 吕杰, 宋文吉, 罗卫
core   +1 more source

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