2022-23CTB赛制和流程更新，火热报名组队中！
关注社科实践活动的家长和同学对CTB应该并不陌生。全球青年研究创新论坛CTB，由哈佛商学院和清华大学经管学院学者联合启动，旨在让中国青年心怀家国立足身边，提出原创本土解决方案，在世界舞台发声。 CTB 2022-2...
OCR A Level Biology:复习笔记2.4.9 Practical: Measuring Enzyme Activity
Practical: Measuring Enzyme Activity The progress of enzyme-catalysed reactions can be investigated by: Measuring the rate of formation of a product Measuring the rate of disappearance of a substra...
OCR A Level Biology:复习笔记2.4.8 Coenzymes, Cofactors & Prosthetic Groups
Coenzymes, Cofactors & Prosthetic Groups There are substances other than substrates and inhibitors that interact with enzymes Some enzymes can only function properly if another non-protein subs...
OCR A Level Biology:复习笔记2.4.7 Enzyme Activity: Enzyme Inhibitors
Enzyme Inhibitors Reversible inhibitors An enzyme's activity can be reduced or stopped, temporarily, by a reversible inhibitor There are two types of reversible inhibitors: Competitive inhibitors h...
OCR A Level Biology:复习笔记2.4.6 Enzyme Activity: Substrate Concentration
Enzyme Activity: Substrate Concentration The greater the substrate concentration, the higher the rate of reaction: As the number of substrate molecules increases, the likelihood of enzyme-substrate...
OCR A Level Biology:复习笔记2.4.5 Enzyme Activity: Enzyme Concentration
Enzyme Activity: Enzyme Concentration Enzyme concentration affects the rate of reaction The higher the enzyme concentration in a reaction mixture, the greater the number of active sites available a...
OCR A Level Biology:复习笔记2.4.4 Enzyme Activity: Temperature
Enzyme Activity: Temperature Enzymes have a specific optimum temperature This is the temperature at which they catalyse a reaction at the maximum rate Lower temperatures either prevent react...
哈佛和耶鲁大学法学院主动退出U.S. News排名！
哈佛大学、耶鲁大学的法学院宣布 退出U.S. News法学院的年度排名 为什么两所顶尖美国名校要做出这个决定？ 是否对U.S. News排名“权威”形成一种挑战？ 耶鲁大学：称霸32年，排名存在缺陷 耶鲁大学法学院院长Heat...
OCR A Level Biology:复习笔记2.4.3 Enzyme Activity: pH
Enzyme Activity: pH All enzymes have an optimum pH or a pH at which they operate best Enzymes are denatured at extremes of pH Hydrogen and ionic bonds hold the tertiary structure of the protein (ie...
CIE IGCSE Biology: 复习笔记：5.1.4 Enzymes & Temperature: Extended
CIE IGCSE Biology: 复习笔记：5.1.4 Enzymes & Temperature: Extended Enzymes & Temperature: Extended Enzymes are proteins and have a specific shape, held in place by bonds This is extremely i...
OCR A Level Biology:复习笔记2.4.2 Enzyme Action
Mechanism of Enzyme Action Enzymes have an active site where specific substrates bind forming an enzyme-substrate complex The active site of an enzyme has a specific shape to fit a specific substra...
OCR A Level Biology:复习笔记2.4.1 The Role of Enzymes
Enzymes as Catalysts Enzymes are biological catalysts ‘Biological’ because they function in living systems ‘Catalysts’ because they speed up the rate of chemical reactions without being used up or ...
