The different arrangements of atoms caused by rotation about a single bond are called conformations (构象)of the molecule, and a specific conformation is called a conformer (构象异构体, conformation isomer). An analysis of the energy changes that a molecule undergoes as groups rotate about single bonds is called a conformational analysis (构象分析)

An acid is a substance that can donate (or lose) a proton, A base is a substance that can accept (or remove) a proton

Functional groups The structural features that make it possible to classify compounds by reactivity are called functional groups. A functional group is a part of a larger molecule and is composed of an atom or a group of atoms that have a characteristic chemical behavior. The Chemistry of every organic molecules

《结晶学与矿物学》实验 《晶体光学及光性矿物学》实验 《岩石学 A 实验》 《矿相学实验》 《矿产勘查学实验》 《矿体建模及储量估算》实验 《油气地质测试分析实验》实验 《地震测井解释实验》实验 《土壤学》课程实验 《土地信息系统》实验 《地理信息系统 A 实验》 《地理信息系统基础与应用》实验 《地球科学概论》实验 《构造地质学 A》实验 《古生物学》实验 《地层学》实验 《古生物学与地层学》实验 《演化古生物学》实验 《矿床学 A》实验 《地质填图方法与技术》实验 《地球化学》实验 《自然灾害评估与防治》实验 《多元地学数据统计分析方法》实验 《沉积成岩作用研究方法与应用》实验 《岩浆岩成因研究方法与应用》实验 《变质作用研究方法与应用》实验 《地球化学理论与应用》实验 《岩石变形中的微观组构》实验 《成矿构造分析》实验 《构造解析》实验 《区域构造分析》实验 《地球生物学》实验 《地层学理论与应用》实验 《地层建造分析》实验 《生命的历史》实验 《中国地质学》实验 《遥感地质学 A》实验 《区域地质调查方法与技术》实验 《沉积环境与沉积相》实验 《流体包裹体研究及地质应用》实验 《地貌学及第四纪地质学》实验 《遥感原理与方法》实验 《岩石学 B》实验 《矿山地质学》实验 《石油构造分析》实验 《重砂测量与分析》实验 《矿业工程概论》实验 《宝石资源地质学》实验 《显微构造学》实验 《三维地质建模与可视化》实验 《人工智能在地学中的应用》实验 《综合地层学》实验

A ring that contains at least one heteroatom (an atom other than carbon) is called a heterocycle, and a substance based on a heterocyclic ring is a heterocyclic compound. Heterocyclic compounds containing N, O or S are by far the most common

A Testing EXercise (From Glenford Myers: The Art of Software Testing A program reads three integer values from a card. The three values are interpreted as representing the lengths of the sides of a triangle. The program prints a message that states whether the triangle is scalene iso

Definition. A flow network is a directed graph G = (V, E) with two distinguished vertices: a source s and a sink t. Each edge (u, v) ∈ E has a nonnegative capacity c(u, v). If (u, v) ∉ E, then c(u, v) = 0

The location of the dehydration factory must be considered very carefully, because, whereas at one time proximity to the source of raw materials was of paramount importance, availability of an adequate labour force and the provision for effluent disposal will, perhaps, constitute a more pressing requirement. A rural environment is obviously better than a location in a highly industrialised area, because the operation involves the utilisation of a considerable amount

Medical Genetics What is a population from a genetic perspective? A population in the genetic sense, is not just a group of individuals, but a breeding group

Exercise for home study O&W4.47 tea this problem examines the Fourier transform of a continuous-time LTI system with a real, causal impulse response, h(t) (a) To prove that H(w) is completely specified by eh(u) for a real and causal h(t) lore the even part of a function, he(t)