白术、枳实、玫瑰花挥发油-β-环糊精包合物的制备工艺研究

目的确定白术、枳实、玫瑰花挥发油-β-环糊精包合物的最佳包合工艺。方法采用正交试验法,对挥发油与β-环糊精的包合进行3因素3水平考察。结果挥发油与β-CD投料比为1:9,β-CD与加水量的比为9:100倍,包合时间为4h,包合率为85.3%。结论用此法得到的挥发油-β-环糊精包合物的包合率较高,包合物性质稳定,而且包合操作简单。     

A mathematical model of volatile release in mouth from the dispersion of gelled emulsion particles.

This paper presents a mathematical model of in-mouth volatile release from gelled emulsion particles dispersed in a continuous aqueous phase. Data based on APCI MS-Breath analysis is presented to demonstrate the effect of particle size, oil content and oil-water partition coefficients. It is shown that in-mouth release of aroma from the dispersion of gelled emulsion particles follows a two-component kinetic equation with fast and slow components. Both the fast and slow rate constants depend on the particle size, oil content and oil water partition coefficient of the aroma. The relative amount of aroma contributing to the fast and slow components also depends on the size of the particles. In order to understand this unexpected behaviour, an analytical model was developed that considers the interplay between the mass transfer of flavour across the interface of the particles and that across the air-liquid interface. Analytical expressions for the two rate constants and the relative ratio of aroma contributing to the fast component have been derived. From this model, three regimes of in-mouth release of aroma from the dispersion of gelled emulsion particles were identified including, the emulsion regime, the transition regime and the gel particle regime. In the emulsion regime, changes in the size of gelled emulsion particles had negligible impact on the overall release. In the transition regime, the release was controlled by the interaction of flavour transfer from the particles with that across the air-water interface. In the gel particle regime, aroma release at long times was governed by the particles and that at short times was governed by the air-water interface, and the two processes were fully decoupled. A simple relationship was derived for the critical size above which the release of aroma from the dispersion of gelled emulsion particles is affected by the size of the particles.     

Whole CanA Gene Amplification of Helicobacter pylori and Its Fingerprinting by Restriction Fragment Length Polymorphism

To set up a method of amplification for the whole CagA gene of Helicobacter pylori and its fingerprinting by restriction fragment length polymorphism(RFLP),nested PCR was employed in combination with TD-PCR to amplify the gene and EcoRI and Hind Ⅲ were used to generate the RFLP fingerprinting.Target DNA fragments from 13 of 20 samples were successfully amplified and the relevant RFLP fingerprintings were obtained.It is concluded that the method can be used to amplify the whole CagA gene and CagA gene has apparent diversity of RFLP profile.     

产后抑郁症相关因素调查研究

目的探讨产后抑郁症的相关因素.方法采用分层整群抽样方法,对长沙市4所医院300例产后6周复查的初产妇进行Edinburgh产后抑郁量表与自编问卷调查.结果产后抑郁症的发生率为17.3%;产妇年龄、婚姻状况、教育程度与产后抑郁症无关(均P＞0.05),分娩疼痛承受力、分娩方式、新生儿性别、母婴同室、母乳喂养为产后抑郁症的影响因素(P＜0.05、P＜0.01),且分娩方式是产后抑郁症的危险因素,分娩疼痛承受力与母婴同室是保护因素.结论产后抑郁症发生率较高,其影响因素应引起产科工作人员的重视.     

激素敏感型肾病综合征小儿的HLA

为了解中国汉族儿童激素敏感型肾病综合征与ＨＬＡ的关系，研究了３７名该病患儿的ＨＬＡ－Ａ，Ｂ，ＤＲ，ＤＱ抗原频率，ＨＬＡ－Ａ，Ｂ抗原与本病无关联，ＨＬＡ－ＤＲ７抗原频率（３７．８４％）较对照组（１１．２３％）有显著性增高（Ｐｃ＝１．７×１０－３），ＨＬＡ一ＤＱ抗原较对照组低（３２．４３％与６１．４０％，Ｐｃ＝７．７×１０－３），频复发或频反复病人与ＨＬＡ－ＤＲ９抗原相关（Ｐｃ＝２．９×ｌ０－２）。支持该病有免疫遗传基础的假说     

绍兴市省外流动人口的围产儿死亡情况分析

目的:分析浙江省以外的流动人口围产儿死亡特点,比较与常住人口间的孕期保健差异。方法:回顾性分析2003年1月至2006年6月在绍兴市妇幼保健院住院分娩的围产儿死亡监测资料,以浙江省外人口且在本地居住不到1年为流动人口组,其余为常住人口组,两组进行对照。结果:流动人口围产儿死亡率为48.53‰,常住人口组14.68‰,两组差异有极显著性(P<0.01),围产儿死亡构成中两组死产发生亦有差异(0.01相似文献   

中药灵芝对健康人甲襞微循环的作用

系统观察５７例健康人口服灵芝（灵芝多糖体５５ｍｇ／片）前后甲襞微循环的变化。结果显示：服药前后大、小动脉血压无显著变化；口服灵芝３天后输入枝口径及输出枝口径均有明显扩张；管袢密度、红细胞流速增加不显著。口服灵芝７天的动态变化显示，服药８ｈ后输入枝、输出枝口径即有显著扩张，第７天管袢密度开始明显增加。服用不同剂量灵芝（２片、４片、８片，３次／日）３ｈ后，管袢密度、输入枝、输出枝口径、流速均有增加趋向，但Ｐ＞０．０５，其中８片组管袢口径、管袢密度有显著增加（Ｐ＜０．０５），但红细胞流速却有显著下降（Ｐ＜０．０５）。结果提示：连续、适量（２片，３次～４次／日）服用灵芝，可显著改善微循环灌流量，从而改善和保护组织及脏器功能。     

Evaluation of endothelial cell migration with a novel in vitro assay system

In this study we introduce a novel in vitro 'oil-drop' assay system for the measurement of endothelial cell (EC) migration, based on the original concept of the Teflon fence assay (Pratt et al., 1984; Am. J. Pathol. 117: 349–354). An aliquot of 15–20,000 human umbilical vein EC (HUVEC) is pipetted through a layer of mineral oil. The cells readily attach, spread and migrate on the surface of a matrix-coated tissue culture dish as a confluent circular monolayer. Migration is measured as the net increase in the total area covered at 24 hours. We have used this system to quantify EC migration on matrices composed of a mixture of type I collagen and either von Willebrand factor (vWF) or fibronectin (FN) in the presence or absence of tumor necrosis factor (TNF). Plating efficiency on both vWF/collagen and FN/collagen, measured by counting cells after attachment and spreading, is about 80%. With this method, migration on vWF/collagen was about 6.4 mm² and 5.3 mm² for TNF-treated and untreated HUVEC, respectively. HUVEC migration on FN/collagen was slightly greater – 6.4 mm² and 6.5 mm² with and without TNF treatment, respectively. During the 24 hour time period, HUVEC numbers increased 30–40% on vWF/collagen, and 60–80% on FN/collagen, with increased proliferation observed with TNF- treatment. EC proliferation could be completely inhibited by 2 mM hydroxyurea. This assay system has proven useful in our studies to quantify cell migration and proliferation.     

Culturing of skin fibroblasts in a thin PLGA-collagen hybrid mesh

A thin biodegradable hybrid mesh of synthetic poly(DL-lactic-co-glycolic acid) (PLGA) and naturally derived collagen was used for three-dimensional culture of human skin fibroblasts. The hybrid mesh was constructed by forming web-like collagen microsponges in the openings of a PLGA knitted mesh. The behaviors of the fibroblasts on the hybrid mesh and PLGA knitted mesh were compared. The efficiency of cell seeding was much higher and the cells grew more quickly in the hybrid mesh than in the PLGA mesh. The fibroblasts in the PLGA mesh grew from the peripheral PLGA fibers toward the centers of the openings, while those in the hybrid mesh also grew from the collagen microsponges in the openings of the mesh resulting in a more homogenous growth. The proliferated cells and secreted extracellular matrices were more uniformly distributed in the hybrid mesh than in the PLGA mesh. Histological staining of in vitro cultured fibroblast/mesh implants indicated that the fibroblasts were distributed throughout the hybrid mesh and formed a uniform layer of dermal tissue having almost the same thickness as that of the hybrid mesh. However, the tissue formed in the PLGA mesh was thick adjacent to the PLGA fibers and thin in the center of the openings. Fibroblasts cultured in the hybrid mesh were implanted in the back of nude mouse. Dermal tissues were formed after 2 weeks and became epithelialized after 4 weeks. The results indicate that the web-like collagen microsponges formed in the openings of the PLGA knitted mesh increased the efficiency of cell seeding, improved cell distribution, and therefore facilitated rapid formation of dermal tissue having a uniform thickness. PLGA-collagen hybrid mesh may be useful for skin tissue engineering.     

L—精氨酸对梗阻性黄疸大鼠肾脏的影响

目的探讨L-精氨酸（L-Arg）对梗阻性黄疸大鼠肾脏的影响及机制。方法双重结扎大鼠胆总管造成梗阻性黄疸模型,14d后,分别给予不同组大鼠L-Arg500mg