Construction of an electronic physical map of Magnaporthe oryzae using genomic position-ready SSR markers

Magnaporthe oryzae is a model for plant pathogenic filamentous fungi. We have assembled a simple sequence repeat (SSR)-based physical map of the species, using in silico sequence data. A set of 120 SSR markers was developed from the genomic sequence of the reference isolate 70-15. These markers were readily amplified from the genomic DNA of other isolates, and high levels of allelic variation characterised the parental isolates of the two crosses tested. All the markers were locatable to one of the seven M. oryzae chromosomes. An SSR-based physical in silico map was constructed, and pre-existing SSR and RFLP loci were integrated into the map, along with 23 Avr (avirulence) genes and two other genes of importance to the plant/pathogen interaction. This map provides a platform for population genetics and functional genomics studies in the model pathogen, and even in other evolu- tionally related pathogens.     

煤矿安全生产预防预警机制和应急预案及其关键技术研究

分析了煤矿建立事故预警机制及应急预案的必要性,探讨了重大事故应急预案的核心要素,展望了煤矿应用预警机制和应急预案的前景。     

非线性发展方程中“秩”与解的关系

引入“秩”的概念，证明了“秩”同类的非线性发展方程具备Jacobi椭圆函数展开形成的解，而“秩”异类的非线性发展方程不具备此类型的解，但不论“秩”同类还是异类的非线性发展方程都可能具有双曲正切函数及多种形式的双函数展开形式的解，并以“秩”异类的弹性介质中非线性波方程为例对该结论加以证明.     

新课程背景下的小学数学课堂教学评价

小学数学课堂教学评价,是学校教研活动最常见的一种形式,也是评估课堂教学质量的重要手段.一直以来,课堂教学评价的关注点都是以"教师"为主,主要关注的是教师的课堂表现.新课程提出,关注学生在课堂教学中的表现应成为课堂教学评价的主要内容,主张以学论教、以教促学,充分体现以评价促进学生发展和教师专业成长的双重功能.     

红树莓品种的越冬性初步研究

在沈阳地区,采用电导法、组织褐变法和萌芽生长法对不同红树莓品种的越冬性进行研究,结果表明,树莓越冬枝条在-20~-25℃条件下遭受冻害,致死临界温度为-30℃,越冬期间枝条表皮保水能力较差,抽条现象较严重.树莓越冬伤害为冻害和抽条伤害两种,但主要是抽条伤害.     

民族旅游与社区教育:以大寨红瑶为例

通过广西龙胜大寨红瑶个案,分析了民族旅游对社区教育的影响,认为民族村寨传统的教育观念和文化传承方式都发生了大的变迁,同时,面临消失的传统文化在旅游中得到了复兴,红瑶人的价值体系也在旅游开发中被重新建构。     

Heterogeneous oxidation of carbonyl sulfide on mineral oxides

Heterogeneous oxidation of carbonyl sulfide (OCS) on mineral oxides including SiO2,Fe2O3,CaO,MgO,ZnO and TiO2,which are the main components of atmospheric particles,were investigated using in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS),ion chromatography (IC),temperature-programmed desorption (TPD),X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) methods. The main products and intermediates of the heterogeneous oxidation of OCS on these oxides were identified with in situ DRIFTS and IC. The reaction mechanism and kinetics were also discussed. It is found that the reaction mechanism on these mineral oxides is the same as that on Al2O3 for the same final products and the intermediates at room temperature. Namely,OCS can be catalytically oxidized to produce surface SO42- species and gaseous CO2 through the surface hydrogen thiocarbonate (HSCO2-) and HSO3- species. The activity series for heterogeneous oxidation of OCS follows: Al2O3 ≈ CaO > MgO > TiO2 ≈ ZnO > Fe2O3 > SiO2. The specific area,basic hydroxyl and surface basicity of these oxides have effect on the reactivity. This study suggests that heterogeneous reactions of OCS on mineral dust may be an unneglectable sink of OCS.     

我国农村人力资本现状分析

我国农村人力资本存量较小、质量较差，且存在着地域分布不均衡、产业分布不均衡、溢出效应比较明显等特点。改善农村人力资本现状是解决三农问题的重要手段。因此，必须增加对农村的人力资本投资，调节人力资本在不同地区和不同产业的分配，增强城市对农村人力资本的溢出效应，建立完整的人力资本产权，完善农村市场经济制度。     

外语教学呼唤民主

本文提出在外语教学中要通过转变教师教学观念,努力融洽师生关系,在教学过程中体现以学生为中心,教学评价民主化,走出外语教学民主化的误区以实现外语教学民主。     

纳米硅对三峡库区柑橘青霉菌的药效试验

对三峡库区柑橘果实贮藏期间携带微生物进行了分离,青霉菌(Penicillium)为主要的致病菌;不同药剂处理接种青霉菌的柑橘果实,实验表明多菌灵抑菌效果最好,防效达到65.4%,其次是纳米硅达到53.4%;对青霉菌的抑菌■试验表明,多菌灵抑制效果最好,抑制率为90%,纳米硅为88%.说明纳米硅对柑橘青霉病有一定的防治效果,并因其无公害有施用价值.