野生石芽茶营养成分与药用成分的分析

对广西野生石芽茶中的营养成分及其药用成分进行了系统分析检测。结果表明,该茶叶含有丰富的氨基酸、维生素和无机元素等营养成分,且其药用成分总黄酮的含量为28.4％,明显高于其它茶叶。     

4 689例血培养病原菌的临床分布与种类分析

目的：了解本院血培养病原菌的检出种类及在临床各科的分布。方法：应用Bact/Alert-120全自动血培养仅对4689例血标本进行培养,标本检出病原菌按常规鉴定并分类统计。结果：检出有临床意义病原菌355株,其中肠杆菌科和葡萄球菌属的细菌为主要病原菌（35.5%和27.3%)。以2000年全年标本统计,阳性率12.5%,假阳性率0.4%。以内科,外科,儿科,传染科,血液科,新生儿科等为病区统计,病原菌种类分布有明显不同,此外,病原菌种类不同,其阳性报告时间不同。结论：应用全自动血培养仪可以缩短阳性检出时间,了解病原菌在临床各科的分布特点,有利于医师对败血症诊治,及时准确地选择药物。     

ILLUSTRATIVE EXAMPLES OF PRINCIPAL COMPONENTS ANALYSIS

In order to provide a deeper understanding of the workings of principal components, four data sets were constructed by taking linear combinations of values of two uncorrelated variables to form the X-variates for the principal component analysis. These examples are believed useful for aiding researchers in the interpretation of data and they highlight some of the properties and limitations of principal components analyses.     

血循环障碍在高原冻伤中的形态计量观测

本文对高原冻伤中血液循环障碍作形态计量,旨在探讨血循环障碍在冻伤过程中的变化及高原冻伤发病机理中所起的作用。实验选用Ｗｉｓｔａｒ雄性大鼠４０只,随机分为平原冻伤组、急性低氧冻伤组和低氧习服冻伤组。习服组动物于低压舱内模拟海拔６０００ｍ缺氧每日４ｈ,连续两周。其余动物常规饲养。习服期满次日习服组与低氧组一同进入舱内模拟海拔６０００ｍ低氧４ｈ,再行冷冻。冻后继续低氧４ｈ。冻后４８ｈ取材。对各组动物冻后４８ｈ冻肢皮下血管的病变作图象分析。结果发现,平原组血管淤滞、血栓绝对数及其百分比均为最低,习服组最高,低氧组居中。但低氧组与平原组的血栓／淤滞百分比无明显差别。骨骼肌坏死的面积百分比习服组显著高于低氧组与平原组,而后两组间无差别。血栓／淤滞百分比与骨骼肌坏死面积百分比之间的有高度相关关系。冻融是直接引起血管内皮损伤的原发因素,局部血液循环障碍是造成严重的继发损伤的主要原因。     

TOPOGRAPHY OF THE ORGANIC COMPONENTS IN MOTHER-OF-PEARL

1. The topography of the organic components (conchiolin) has been investigated on positive, postshadow-cast, formvar, and carbon replicas of mother-of-pearl from shells of a Cephalopod, of two Gastropods, and of six Pelecypods. All these shells are characterized by a true nacreous inner shell layer. 2. The material included normal shell surfaces, fragments of cleavage obtained by fracture, and surfaces polished tangentially and transversally to the inner surface of the shells. Replicas of these surfaces were prepared before and after etching of graded heaviness, induced by a chelating agent (sequestrene NA 2, titriplex III). Micrographs of the successive steps of the process of corrosion have been recorded. 3. Corrosion unmasked, on the nacreous surfaces, organic membranes or sheets, running as continuous formations in between adjacent mineral lamellae, and separating the individual crystals of aragonite which are aligned in rows and constitute each lamella. 4. The interlamellar sheets of material exhibit a reticulated structure, which is especially visible in preparations orientated tangentially to the lamellae and to the tabular surface of the aragonite crystals. The pattern of this lace-like structure, different in the various species studied, appeared in the same species as closely similar to that reported previously in leaflets of thoroughly decalcified mother-of-pearl, dissociated by ultrasonic waves. The present results support former conclusions with regard to the existence of taxonomic differences between Cephalopods, Gastropods, and Pelecypods in the morphological organization of the organic phase within mother-of-pearl.     

山西甘草化学成分的研究

本文报导了从山西甘草中分离出的八种化合物,经化学方法和光谱分析（ＵＶ,ＩＲ,ＭＳ,＾１ＨＮＭＲ和＾１３Ｃ ＮＭＲ）鉴定出其中六种化合物,１蔗糖（ｓｕｃｒｏｓｅ）,Ⅱ４’５,７－三羟革－８－异然基黄酮（４’,５,７－Ｔｒｉｔｈｙｄｒｏｘｙ－８－ｐｒｅｎｙｌ－ｆｌａｖｏｎｅ）;Ⅲ异芒柄花甙（Ｉｓｏｏｎｏｎｉｎ）,Ⅳ,４‘,７－二羟基黄酮（４’－７－Ｄｉｔｈｙｄｒｏｘｙｆｌａｖｏｎｅ）;Ⅳ（ｌｉｑｕｉｒ     

THE AGGLUTINATION OF RED BLOOD CELLS IN THE PRESENCE OF BLOOD SERA

1. The addition of blood serum displaces the optimum for agglutination of red blood cells in a salt-free medium to the reaction characteristic of flocculation of the serum euglobulin. 2. This effect is not due merely to a mechanical entanglement of the cells by the precipitating euglobulin, since at reactions at which the latter is soluble it protects the cells from the agglutination which occurs in its absence. 3. A combination of some sort appears therefore to take place between sheep cells and sheep, rabbit, and guinea pig serum euglobulin, and involves a condensation of the serum protein upon the surface of the red cell. 4. At the optimal point for agglutination of persensitized cells both mid- and end-piece of complement combine with the cells. 5. Agglutination is closely related to an optimal H ion concentration in the suspending fluid, and probably of the cell membrane, and not to a definite reaction in the interior of the cell.     

GENETIC COMPONENTS OF VARIATION IN ENERGY STORAGE IN DROSOPHILA MELANOGASTER

One approach to examining the underlying genetic structure of the variation in a continuous phenotype is to measure a set of possibly mechanistically related traits and determine the quantitative genetic aspects of their transmission. In this study the quantities of stored triacylglycerol and glycogen were measured along with the activities of 10 enzymes in related metabolic pathways in a set of 1,157 half-sib families of Drosophila melanogaster. The families were structured with each male being mated to 10 females and two offspring were scored from each female. Parents and offspring were scored for the phenotypes, and the components of variance (additive, dominance, and environmental) were estimated in three ways, including analysis of variance on offspring alone, parent-offspring regression, and maximum likelihood methods. While there were differences among the estimates made by the three methods, a consistent result was that substantial additive genetic variation was detected for all the traits. Consistent with models for the quantitative genetics of enzyme kinetics, the genetic variances of global properties were largely additive. Previous studies with extracted chromosome lines had indicated several significant genetic correlations among these characters, and much of the correlation was attributable to additive effects. The results imply that there is substantial opportunity for natural or artificial selection to act on quantities of stored lipid and carbohydrate, and that the response to selection is likely to be in part mediated by changes in the kinetics of the enzymes targeted in this study.     

栀子成分的开发研究进展

本文概述栀子的有效成分及栀子色素的研究进展 ,并对国内栀子利用的前景进行了分析。