一、蛋白质是生命活动的主要体现者构成生命现象的各种活动主要是通过蛋白质来实现的。 二、蛋白质广布于各种生物组织中,是细胞的重要成分。蛋白质在生物体内的形成和作用是多样化的。大凡构成生物体的结构物质(如肌肉蛋白),促进体内化学反应的催化剂(如酶),调节生理功能的肽类激素

5 separate events must occur: -O must be successfully transported from bulk solution(mass transport) -O must adsorb transiently onto electrode surface (non-faradaic) CT must occur between electrode and (faradaic)

食品中维生素和矿物质的含量是评价食品营养价质的重要指标之一人类在 长期进化过程中,不断地发展和完善对营养的需要,在摄取的食物中,不但需要 蛋白质、糖类化合物和脂肪,而且需要维生素和矿物质,如果维生素或矿物质供 给量不足,就会出现营养缺乏的症状或某些疾病,摄入过多也会产生中毒

糖类化合物是自然界分布广泛、数量最多的有机化合物,是食品的主要组成 成分之一,也是绿色植物光合作用的直接产物。自然界的生物物质中,糖类化合 物约占3/4,从细菌到高等动物都含有糖类化合物,植物体中含量最丰富,约占 其干重的85%~90%,其中又以纤维素最为丰富

Net flow of electrons from MNet flow of electrons from to solute solute to m .Ef more negative than Eredox more positive than Eredox more cathodic more anodic

Q: What Experiment is This? Excitation Name of experimenttype of excitation time

Desired voltage achieved by anode cathode stacking cells (in series) Fuel reformer Natural gas, alcohol

UME's- Advantages Reduced capacitance Low ir drop

General Approach to Electrochemical Experiments Identify assumptions Ditusion- ass tran sort +Identify suitable boundary conditions Solye linear diffusion equation (Fick's 2nd law -use Laplace transtorm

Junction potentials Whenever we change electrolyte or solvent there is a cost in that we create a double layer (electrode)which has a small but often measureable potential We call this potential a junction potential