传统发酵豆酱制品中霉菌菌群的动态分析

以黑龙江省齐齐哈尔市拜泉县农家自然发酵黄豆酱为研究对象,通过传统微生物学方法对发酵不同时期的发酵豆酱制品中的霉菌进行分离、培养、计数和初步鉴定,共检测到犁头霉属(Absidia),曲霉属(Aspergillus),米曲霉(Aspergilleas oryzae),毛霉属总状枝毛霉组(Mucor racemosus),雅致放射毛霉属(Actinomucorelegans),毛霉属大毛霉组(Mucedo)六种霉菌,其中米曲霉(Aspergillusoryzae)在整个发酵过程占绝对优势,分析了豆酱发酵过程中微生物种群的数量关系、种群动态变化规律,为筛选优良的豆酱发酵菌株和功能菌株,实现工业化生产豆酱提供理论依据。     

高等白蚁Macrotermes subhyalinus消化道的研究进展

概述了高等白蚁亚科Macrotermes subhyalinus的消化道结构及其在形态学、生理学和生物学的特征,以及内共生微生物的条件等,为有效地防治白蚁Macrotermes subhyalinus,提供理论上的指导.     

Chang＇E-1 orbiter discovers a lunar nearside volcano： YUTU Mountain

In the day time of the Moon surface, the strong illumination from high altitude and high albedo rate radical craters will introduce the illumination effect on observing the nearby low altitude, low albedo rate and shallow small slop rate area seriously, and even can ＂hide＂ the later area from the light. Based on the lunar global topography model obtained by Chang＇E-1 mission, and by comparing with the lunar gravity model, a volcano named ＂YUTU Mountain＂ has been identified. It is a volcano with diameter of -300 km and height of -2 km located at （14°N, 308°E） in Oceanus ProceUarum. Besides, the DEM of another volcano named ＂GUISHU Mountain＂ in the same area has been improved. This new discovery will benefit the study of lunar magmatism and volcanism evolution in the nearside of the Moon.     

金属表面多层弛豫的新模型

该文发展了作者之一及其合作者提出的修正的点离子模型,采用单指数形式模拟金属中的电荷分布,据此计算得到的多层弛豫与实验相符.文中的结果表明,只要获得有关金属的电荷分布资料即能预言该金属的表面多层弛豫.     

沤麻用果胶酶产生菌的选育及脱胶过程中细菌种群的初步分析

由沤麻液中分离并选育得到两株果胶酶产生菌,分别命名为HDYM-01和HDYM-02。采用形态观察、生理生化特征及16SrDNA等方法进行鉴定,确定HDYM-01为霍氏肠杆菌(Enterobacter hormacchei),HDYM-02为蜡状芽孢杆菌(Bacillus cereus)。通过对沤麻过程中的微生物多样性的研究,确定了在沤麻过程中兼性厌氧菌起主要作用,在沤麻过程中可培养的兼性厌氧菌数最多,可达7.3×107cfu·mL-1。而对沤麻过程中优势菌群的分析可知,假单胞菌属是优势菌属。     

Ethylene signaling in rice

Ethylene regulates many aspects of growth, development and responses to environmental stresses in plants. Its signaling pathway has been established in model dicotyledonous plant Arabidopsis. However, its roles and signal transduction in monocotyledous rice plant remain largely unknown. In this review, we summarize the current advances in rice ethylene signaling studies and compare these with the results from Arabidopsis and other plants. Most of the components homologous to those in Arabidopsis ethylene signaling pathway have been found in rice, including five ethylene receptors, OsEIN2, OsEIL1, and OsERFs. Rice ethylene receptors are functionally more divergent than that of Arabidopsis. OsEIN2 and OsEIL1 display limited roles in regulation of rice ethylene responses compared with their Arabidopsis orthologs. ERF-like proteins OsERF1 and OsEBP-89 appear to be involved in rice ethylene signaling. However, whether they are activated through OsEIN2 and OsEIL1-mediated pathway needs further studies. Given that rice uses ethylene to control many processes that do not exist in Arabidopsis, it seems that new components or new mechanisms may exist in rice ethylene signaling pathway.     

基本图像特征用于文本图像文种识别

为了解决现有方法在运算速度和识别效果上的矛盾,该文将基本图像特征用于文本图像文种识别. 按照纹理分析结构方法的观点,将纹理基元划分为7 种类型,提取描述文本图像纹理基元构成以及其空间位置关系的特征,采用支持向量机对所提特征进行训练和分类,实现文字种类识别. 实验选用有质量退化的中、英、俄、日、韩、阿拉伯等10 种不同语言文字的文本图像,结果表明该算法运算速度快,有较高的识别准确率,并对图像质量退化有较好的鲁棒性.     

nodD基因的克隆及其导入大豆根瘤菌工程菌株的构建

以快生型大豆根瘤菌(Sinorhizobium fredii)15067的基因组DNA作为模板,采用PCR技术,克隆结瘤基因nodD编码区序列;利用DNA重组技术,将nodD基因连到lac启动子的下游,通过luxAB基因标记的质粒载体pTR102构建表达载体pTR102-Plac-nodD,采用三亲本杂交的方式,将构建的表达载体转化土著大豆根瘤菌,构建转基因工程菌株,为研究转基因工程菌株对大豆结瘤能力的影响提供依据。     

抗癌药物紫杉醇产生菌原生质体形成及释放规律

详细研究了抗癌药物紫杉醇产生菌树状多节孢原生质体形成和释放的规律 .从酶系组成、酶解时间、酶解温度、渗透压稳定剂、pH值、培养基成分、培养方式、预处理等因素对树状多节孢原生质体形成和释放的影响进行了研究 ,得出了该菌的最佳原生质体制备条件及其规律 ,为以后通过原生质体技术构建紫杉醇产生菌的工程菌株奠定了基础 .