不同无性系杜仲含胶细胞密度的动态研究

文章通过对不同无性系杜仲叶中含胶细胞密度的测量,对其生长动态作了分析研究,结论如下:不同无性系含胶细胞的密度在七月中旬达到最大;在同一引种地的雌雄株之间,雄株含胶细胞的密度不完全小于雌株。     

金黄色葡萄球菌在皮肤病医院对苯唑西林敏感性降低并无性系蔓延

2000年11月，作者得知从Aarhus大学医院皮肤科患者分离到的金黄色葡萄球菌对苯唑西林出现界线耐药（BORSA）。本文旨在描述其表型和基因型，并评估可能的传播途径以干预和阻止进一步蔓延。菌株由脉冲场凝胶电泳鉴定。几个感染控制方案的缺口显示患者间可直接或间接传播。皮肤屏障缺陷、皮肤病患者金黄色葡萄球菌的高携带率和院内双氯西林的高消耗率可促使传播。改善普通感染控制措施和重新评价院内抗生素政策后，该菌的暴发感染消失。     

牛蒡无性系建立研究

为保存野生资源,满足栽培对种苗的需要,以牛蒡嫩茎为材料,应用组织培养的方法,进行了嫩茎愈伤组织诱导与分化、分化芽生根、试管苗的生根继代及移栽和定植的研究。结果表明:MS+6-BA0.3mg.L-1+2,4-D2.0mg.L-1是嫩茎愈伤组织诱导培养和继代增殖培养的理想培养基;MS+6-BA1.5mg.L-1+NAA0.1mg.L-1+AgNO31.2mg.L-1是愈伤组织分化培养的理想培养基;White+NAA0.1mg.L-1+IAA0.2mg.L-1是不定芽生根培养、试管苗生根继代培养及快速繁殖的理想培养基。试管苗易移栽和定植易成活,且定植的试管苗保持了野生牛蒡的所有生物性状。     

不同无性系杜仲含胶细胞长度的动态研究

通过对不同无性系杜仲叶中含胶细胞长度的测量及其生长动态作了分析研究,结论如下:不同无性系含胶细胞的长度在七月中旬达到最大,在同一引种地的雌雄株之间,雄株含胶细胞的长度不完全小于雌株。     

云南黄连不同部位有效成分及生物量的比较研究

云南黄连Coptis teetaW all.为毛茛科黄连属植物,也称云连或云黄连,主产于云南省怒江地区。植株含药根碱、小檗碱、巴马亭等多种生物碱,其含量和抗菌消炎药效比川黄连(味连)好[1]。云南黄连为多年生宿根草本,植株寿命长达10年以上,其有性生殖退化,而无性生殖发达,具有发达的地     

Neurogenesis of adipose-derived stem cells in hydrogel

Adipose tissue is a readily available source of adult stem cells with multipotent properties suitable for tissue engineering and regenerative medical applications. Peptide hydrogel is a novel biomaterial which provides three-dimensional microenvironments for a variety of cells for tissue grafting. In this study, adipose-derived stem cells (ADSCs) were isolated from rats, seeded into the peptide hydrogel polymer scaffolds and cultured in Neurobasal (NB) media supplemented with B27, basic fibroblast growth factor (bFGF) and epidermal growth factor (EGF). Ten days after the culture, some cells were expanded into clonal populations in which the expression of both Nestin and Brdu was detected but only Brdu expression was detected in the cells that were not expanded into clonal populations. Our results suggested that ADSCs in peptide hydrogel polymer scaffolds can be induced to differentiate into cells capable of expressing the neuron-associated markers, self-renewal and self-propagation.     

地丁草组织培养及无性系建立的研究

目的:为满足人们栽培对种苗的需要,并保护野生资源.方法:以地丁革不同外植体为材料,进行了愈伤组织诱导与分化、不定芽生根和试管苗生根继代培养研究,建立起地丁革的无性系.结果:MS+ NH4H2PO420 mg·L-1+BA0.2 mg·L-1+IBA0.1mg·L-1+ NAA 0.8～1.0mg·L-1是愈伤组织继代扩...