Example: In 1 liter pure water add 0.01 mol of hydrochloric acid. Calculate this solution's ph change value. And in 1 liter contain 0.1 mol acetic acid and 0. acetate ion mixture solution add 0.01mol of hydrochloric acid. Calculate this solution ph change value. Notice: Square bracket will instead of equilibrium concentration in following time. Such as [H+] instead hydrogen ion equilibrium concentration

Chapter 6. Laboratory animal facilities Those who use animals for experimental and diagnostic purposes have a moral obligation to take every care to avoid causing them unnecessary pain or suffering. The animals must be provided with comfortable, hygienic housing and adequate wholesome food and water At the end of the experiment they must be dealt with in a humane manner

Marine engine is an engine that propels a water-born vessel. Even in small craft the marine engine must have the following characteristics: reliability, light weight, compactness fuel economy, low maintenance, long life, relative simplicity for operating personnel, ability to reverse, and ability to operate steadily at low or cruising speed. The relative importance of these

一、营养(Nutrition) 二、营养物(nutrient) to synthsize (build up) protoplasm to supply energy for all life processes 第一节微生物的六种营养要素 碳源 carbon source.g.,carbohydrate) 氮源 nitrogen source(e.g.protein or ammonia) 能源 Energy 生长因子 Essential metabolites(vitamins; possibly amino acids) 无机盐 Certain inorganic ions 水 Water

地下水的运动 渗流 过水断面A (a) (b) 图59地下水在土层孔隙中的流动 (a)一水流实际流线;(b)一水流虚构流线 渗透流速=Q/A 实际流速u=Q/A’V