论思想政治教育方法及其运用艺术

思想政治教育方法是完成思想政治教育目标的必要条件，是教育与受教育相互作用的媒介与纽带，它可以分解成多个多层次和多种方式。 但是，要提高思想政治教育的效果与效率，还必须进行多种教育方法的整合和教育艺术的运用。     

Isolation and physiological characteristics of a premature senescence mutant in rice （Oryza sativa L.）

A rice pse(t) (premature senescence, tentatively) mutant line, was isolated from 4500 independent T-DNA inserted transgenic lines. The symptoms of premature senescence appeared more severely than those of the control plants (Zhonghua 11,japonica) at the last development stage. To characterize the mutant and provide basic information on the candidate genes by mapping to a physical region of 220-kb, experiments were carried out in two phytotrons under controlled temperature of 24 ℃ and28 ℃, respectively. The content of chlorophyll, soluble protein and MDA (malondialdehyde), net photosynthesis, the antioxidant enzyme activities of SOD (superoxide dismuase) (EC 1.15.1.1) and POD (peroxidase) (EC 1.11.1.7) and the peptidase activities of leaves were measured from top to bottom according to the leaf positions at the flowering stage. Compared with the control plant,the mutant showed the following characteristics: (1) Higher net photosynthesis rate (Pn) appeared in the 1 st and 2nd leaves, contents of chlorophyll and soluble protein were also higher in the 1 st leaf; (2) The activities of SOD, POD and peptidase were higher according to the leaf position from top to bottom; (3) The symptom of premature senescence was accelerated in the mutant at 28℃treatment. The MDA content and the SOD and POD activities between the 24 ℃ and 28 ℃ treatment mutants were not significantly different. Content of chlorophyll and soluble protein of leaves mutant decreased rapidly at 28 ℃ treatment. The results show that pse(t) is sensitive to high temperature. The probable function of PSE(T) is discussed.     

赴澳留学生趋向综述

随着中澳两国教育合作交流的不断深入以及中国社会经济建设的发展,在澳中国留学生素质结构及思想观念发生了较大变化。通过对澳大利亚教育体制之优势的分析和在澳中国留学生现状的调研。我们相信在澳中国留学生将会成为21世纪国家建设的宝贵人才资源。     

QUANTUM CHEMICAL STUDIES ON A NEW ORGANOSULFUR REACTION MECHANISM

ＱＵＡＮＴＵＭＣＨＥＭＩＣＡＬＳＴＵＤＩＥＳＯＮＡＮＥＷＯＲＧＡＮＯＳＵＬＦＵＲＲＥＡＣＴＩＯＮＭＥＣＨＡＮＩＳＭＺｈｕＪｉｎ；ＣｈｅｎＹａ－ｌｉｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＣｈｅｍｉｓｔｒｙ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０...     

Generalization of 3D Mandelbrot and Julia sets

INTRODUCTION Mandelbrot and Julia sets have been extensively investigated in great detail in terms of their aestheti-cally pleasing geometrical shapes, infinite detail, self-similarity, periodicity and many other character-istics. The beauty and intricacy of these sets in the complex plane stimulate the scholars’ enthusiasm for viewing sets that occupy more than two dimensions. However, investigations on the generalizations of fractal sets to higher-dimensional spatial space have come u…     

Science Letters： Simultaneous removal of nitrate and heavy metals by iron metal

INTRODUCTION Nitrate and heavy metals commonly found ingroundwater pollutants constitute significant healthrisk to humans and a burden on the environment.Mixtures of these compounds often exist in soils andgroundwater at numerous contaminated sites. Highnitrate (NO3 ) levels in drinking water supplies sig- ?nificantly endanger human health, as they are directlyresponsible for methemoglobinemia in infants (bluebaby syndrome) and may play a role in the develop-ment of som…     

Whole genome amplification in preimplantation genetic diagnosis

Preimplantation genetic diagnosis (PGD) refers to a procedure for genetically analyzing embryos prior to implantation, improving the chance of conception for patients at high risk of transmitting specific inherited disorders. This method has been widely used for a large number of genetic disorders since the first successful application in the early 1990s. Polymerase chain reaction (PCR) and fluorescent in situ hybridization (FISH) are the two main methods in PGD, but there are some inevitable shortcomings limiting the scope of genetic diagnosis. Fortunately, different whole genome amplification (WGA) techniques have been developed to overcome these problems. Sufficient DNA can be amplified and multiple tasks which need abundant DNA can be performed. Moreover, WGA products can be analyzed as a template for multi-loci and multi-gene during the subsequent DNA analysis. In this review, we will focus on the currently available WGA techniques and their applications, as well as the new technical trends from WGA products.     

混凝土结构设计耐久性环境区划标准

混凝土结构耐久性环境区划标准的目的就是为混凝土结构耐久性设计提供合理的设计参数.混凝土结构耐久性环境区划标准在结构全寿命周期成本原理基础上考虑了环境对结构的影响,并将结构的重要性、结构形式和功能等多方面因素一并纳入考虑之中.首先给出了混凝土结构设计耐久性环境区划标准的概念和建立该标准的3个基本原则,其次根据自然环境条件和结构重要性等确定了区划的主要影响因素,然后以浙江省公路桥梁结构耐久性环境区划图的编制为例说明了混凝土结构耐久性环境区划的可行性与实用性,最后根据区划图给出了耐久性区划标准的若干设计规定.     

Fe salts as catalyst for the wet oxidation of o-chlorophenol

INTRODUCTION Chlorophenols (CPs) are chemicals widely used in industry to manufacture insecticides, herbicides, fungicides, biocides, and dye, are also found in the effluent of the pulp and paper mill industry, and are mainly man-made compounds, and have been recog-nized as organic pollutants of air, groundwater, soil and sediments. They are carcinogenic and stable in water. Most chlorophenols are listed as priority pol-lutants by the US Environmental Protection Agency (1988) due to th…