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Genetic biosensors for small-molecule products: Design and applications in high-throughput screening 被引量:3
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作者 Qingzhuo Wang Shuang-Yan Tang Sheng Yang 《Frontiers of Chemical Science and Engineering》 SCIE EI CAS CSCD 2017年第1期15-26,共12页
Overproduction of small-molecule chemicals using engineered microbial cells has greatly reduced the production cost and promoted environmental protection. Notably, the rapid and sensitive evaluation of the in vivo con... Overproduction of small-molecule chemicals using engineered microbial cells has greatly reduced the production cost and promoted environmental protection. Notably, the rapid and sensitive evaluation of the in vivo concentrations of the desired products greatly facilitates the optimization process of cell factories. For this purpose, many genetic components have been adapted into in vivo biosensors of small molecules, which couple the intracel- lular concentrations of small molecules to easily detectable readouts such as fluorescence, absorbance, and cell growth. Such biosensors allow a high-throughput screen- ing of the small-molecule products, and can be roughly classified as protein-based and RNA-based biosensors. This review summarizes the recent developments in the design and applications of biosensors for small-molecule products. 展开更多
关键词 BIOSENSOR small molecule product transcrip-tion factor RIBOSWITCH high-throughput screening
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工业针叶木硫酸盐木质素的电化学氧化降解研究 被引量:3
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作者 许仃仃 王守娟 +3 位作者 孔凡功 赵鑫 胡自豪 毕士林 《中国造纸》 CAS 北大核心 2019年第6期20-26,共7页
以针叶木硫酸盐木质素(KL)为原料,以Ti/RuO2-IrO2为阳极,不锈钢为阴极,在KOH碱性体系下,对KL进行电化学氧化降解,并对降解产物进行分类研究,通过正交实验探究了KL浓度、电流密度、反应温度、反应时间对各类产物产率的影响。结果表明,KL... 以针叶木硫酸盐木质素(KL)为原料,以Ti/RuO2-IrO2为阳极,不锈钢为阴极,在KOH碱性体系下,对KL进行电化学氧化降解,并对降解产物进行分类研究,通过正交实验探究了KL浓度、电流密度、反应温度、反应时间对各类产物产率的影响。结果表明,KL在此体系下进行电化学氧化降解最优的工艺条件为:KL浓度40g/L,电流密度60mA/cm2,反应温度80℃,反应时间3h。在此条件下,各类小分子产物的产率分别为:芳香醛类产物3.442g/kgKL,芳香酸类产物23.913g/kgKL,苯及苯酚类产物0.804g/kgKL。 展开更多
关键词 针叶木硫酸盐木质素 电化学 氧化降解 小分子产物
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Research and development of Chinese anti-COVID-19 drugs 被引量:4
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作者 Xiwei Ji Xiangrui Meng +2 位作者 Xiao Zhu Qingfeng He Yimin Cui 《Acta Pharmaceutica Sinica B》 SCIE CAS CSCD 2022年第12期4271-4286,共16页
The outbreak and spread of coronavirus disease 2019(COVID-19)highlighted the importance and urgency of the research and development of therapeutic drugs.Very early into the COVID-19 pandemic,China has begun developing... The outbreak and spread of coronavirus disease 2019(COVID-19)highlighted the importance and urgency of the research and development of therapeutic drugs.Very early into the COVID-19 pandemic,China has begun developing drugs,with some notable progress.Herein,we summarizes the anti-COVID-19 drugs and promising drug candidates originally developed and researched in China.Furthermore,we discussed the developmental prospects,mechanisms of action,and advantages and disadvantages of the anti-COVID-19 drugs in development,with the aim to contribute to the rational use of drugs in COVID-19 treatment and more effective development of new drugs against severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and the variants.Neutralizing antibody is an effective approach to overcome COVID-19.However,drug resistance induced by rapid virus mutation will likely to challenge neutralizing antibodies.Taking into account current epidemic trends,small molecule drugs have a crucial role in fighting COVID-19 due to their significant advantage of convenient administration and affordable and broad-spectrum.Traditional Chinese medicines,including natural products and traditional Chinese medicine prescriptions,contribute to the treatment of COVID-19 due to their unique mechanism of action.Currently,the research and development of Chinese anti-COVID-19 drugs have led to some promising achievements,thus prompting us to expect even more rapidly available solutions. 展开更多
关键词 Chinese anti-COVID-19 drug small-molecule drug Neutralizing antibody Protein drug Traditional Chinese medicine Natural product Drug candidate Development prospect
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联产混合电解水策略实现节能电化学制氢的最新进展
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作者 Diab khalafallah 张运祥 +2 位作者 王昊 Jong-Min Lee 张勤芳 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2023年第12期44-115,共72页
随着全球能源需求增长和环境污染加剧,发展可持续能源减少对化石燃料(如石油、天然气和煤炭等)的消耗成为实现人类社会可持续发展的关键.氢能因其能量密度高、燃烧无污染、应用形式多样被认为是最理想的替代能源.电解水制氢包括阴极析... 随着全球能源需求增长和环境污染加剧,发展可持续能源减少对化石燃料(如石油、天然气和煤炭等)的消耗成为实现人类社会可持续发展的关键.氢能因其能量密度高、燃烧无污染、应用形式多样被认为是最理想的替代能源.电解水制氢包括阴极析氢反应(HER)和阳极析氧反应(OER),具有绿色环保、生产灵活和纯度高等特点,是理想的绿色生产技术之一.然而,阳极电解水产氧反应动力学缓慢,导致阴极的产氢效率低.此外,在电解水过程中,会产生高氧化性的过氧化氢(H_(2)O_(2)),降低电解水膜的寿命,阻碍电解水技术的实际应用.因此,亟待开发新型高效、稳定且具有高附加值的电解水催化剂.目前,电化学整体水分解(OWS)制氢技术存在安全风险、投资回报低、阳极OER动力学慢和电能消耗大等问题,将阳极氧化反应与混合电解水(HWE)装置中的HER相结合,借助热力学较好的电氧化反应取代缓慢的传统OER反应协同产氢,可以有效克服传统电解水的产率不足,解决污染排放和生物质回收问题.本文综述了协同电催化用于联产氢气和低能耗、高法拉第效率高价值产品的催化剂结构设计,揭示不同协同电催化系统的催化途径和意义,以实现更高效、零碳排放的目标.首先,介绍了HWE系统的发展现状,重点关注各种富氢物质的协同电解,例如酒精、生物质衍生物、葡萄糖和在阳极形成的高附加值化学品.与传统阳极OER工艺相比,有机/生物质底物小分子的OER表现出较低的热力学需求,降低产氢能耗.随后,详细介绍了基于阴极HER和阳极OER协同电解反应、协同催化HWE高效电极/电催化剂的合理设计,以实现高催化活性、高选择性和良好的电化学稳定性.重点讨论了新型电极/电催化剂设计、活性改进以及结构-催化活性关系提升的合成策略.再后,讨论了基于有机/生物质小分子协同HWE系统电催化的代表� 展开更多
关键词 阳极氧化反应 小有机分子 混合电解水 节能制氢 附加值产品 过渡金属 协调效应 活性位 催化活性 稳定性
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