The biological properties of Serratia marcescens bacteriophages]

Sixteen phages active against bacteria of the genus Serratia have been divided into 4 groups on the basis of the study of their biological properties. As a result, 5 typing phages have been selected, which permitted the typing of 77.3% of S. marcescens cultures under study, divided into 13 phage types.     

Effectiveness of comprehensive medico-prophylactic measures in pre-school facilities

The study of health state of children visiting preschool institutions of the town of Tashkent showed that 80% them belonged to 2nd and 3rd health groups. Breathing exercises, point treating massage, therapeutic electrophoresis, galvanization, d'arsonvalization and others measures reduced disease incidence in children by half.     

UHT脱脂纯牛奶感官评价和电子鼻分析相关性研究

选取四种市售不同品牌的UHT脱脂纯牛奶作为研究对象,通过感官描述性分析和电子鼻技术对其风味属性进行评价。采用主成分分析(PCA)和聚类分析(CA)结合偏最小二乘回归法(PLSR)法将电子鼻传感器性能和感官属性进行相关性分析。结果表明样品奶油味及脂质感评分均较低;电子鼻的十个传感器对四个样品的区分效果良好;基于感官属性和传感器响应值的PLSR分析建立的相关性模型,能够很好地解释感官属性和传感器响应值的相关性,反映脱脂纯牛奶样品的整体信息。本文结合两种技术方法,弥补了人工感官评价存在的主观性与智能感官分析的局限性影响,旨在为后续改善脱脂纯牛奶风味提供技术参考。     

GCMS、GCOMS结合感官评价分析牦牛奶粉风味组分

本实验以乙醚为萃取溶剂,采用同时蒸馏萃取法（SDE）提取牦牛奶粉中挥发性组分,结合气相色谱-质谱联用技术（GC-MS）和气相色谱-嗅闻-质谱（GC-O-MS）,对牦牛奶粉中风味物质定性定量分析。通过8名感官评价人员对牦牛奶粉进行感官评价,奶粉样品色泽良好,其中奶香味、奶油味和甜味比较浓郁,有微弱咸味和煮熟味,无苦味、酸味及涩味。GC-MS和GC-O-MS共同检测出21种挥发性物质,包括酮类8种,醛类3种,烯烃类3种,醇类2种,杂环类2种,酚类2种,醚类1种。其中醇和酮类物质含量较高,分别为46.85μg/m L和38.63μg/m L。实验表明,GC-MS、GC-O-MS结合感官评价分析牦牛奶粉中的风味组分的方法是较为准确和高效的。      

The effect of short peptides isolated from the brain of a hibernating suslik on the rat EEG and behavior

In the Drosophila embryo, at specific choice points along the major motor nerves, subsets of motor axons defasciculate and then steer into their muscle target regions. Here we describe the analysis of beaten path (beat), a gene required for the selective defasciculation of motor axons at these choice points. In beat mutant embryos, motor axons fail to defasciculate and bypass their targets. This phenotype is suppressed by mutations in FasII and conn, two genes encoding cell adhesion molecules expressed on motor axons, suggesting that beat provides an antiadhesive function. beat encodes a novel secreted protein that is expressed by motoneurons during outgrowth. Rescue and ectopic expression experiments support the model that Beat protein is secreted by motor axons where it functions to regulate their selective defasciculation at specific choice points.