Results 31 to 40 of about 10,764 (168)
Zhongguo shiyan zhenduanxue, 2009 目的建立一种分离纯化,培养扩增人骨髓MSCs的方法,并探讨体外诱导骨髓间充质干细胞分化为脂肪细胞。方法密度梯度离心,贴壁培养和消化时间控制相结合,分离纯化人骨髓间充质干细胞,并用马血清诱导分化为脂肪细胞。结果MSCs原代培养呈均匀分布的集落样生长,呈梭形,细胞传代稳定,在体外连续传代培养9代,未发生形态学改变,无衰老征象;传代培养MSCs（P3）在20%马血清的L-DMEM培养液中分化为脂肪细胞。结论骨髓MSCs体外增殖和传代能力强,通过离体培养可使体内环境下低丰度的MSCs实现数量扩增 ...
王莹, 罗速
doaj
, 2006 本系列研究筛选了弓形虫（Toxoplasma）速殖子表膜主要抗原（SAG1或P30）及分泌排泄抗原棒状体蛋白基因（ROPl），并将二者拼接构建复合基因（sAG1／ROP1），对其进行扩增、克隆、表达，制备真核表达质粒，接种小鼠，研究其免疫保护效应 ...
周永安 +4 more
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Tungsten is inherently brittle and particularly prone to thermal stress concentration and crack formation during additive manufacturing processes such as laser cladding, which severely limits its engineering applications as a coating material. To address this issue, this study proposes an in situ toughening strategy involving the introduction ...
Guo‐Xing Chen +12 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2012 目的对孕中期羊水标本进行体外分离、培养、扩增,研究孕中期羊水来源干细胞（AFC）的生长特性、细胞表面标记。方法采用贴壁法体外分离孕中期羊水来源干细胞,绘制细胞生长曲线;流式细胞仪检测细胞表面标记。结果原代培养细胞生长潜伏期4-6d,对数增殖期7-13d,生长平台期14-18d;传代培养细胞生长潜伏期1-2d,对数增长期3-6d,生长平台期7-10d。AFCs均一表达CD44,不表达CD45。结论从人孕中期羊水中成功分离具有干细胞性质的细胞群,在体外可迅速扩增。
常颖 +4 more
doaj
The study of angiopoient-1 in repair inflammatory injury of Endothelial progenitor cells [PDF]
, 2010 目的：体外研究携带血管生成素-1(angiopoient-1，Ang-1)基因的慢病毒载体感染内皮祖细胞(endothelialprogenitorcells，EPCs)的方法。检测Ang-1修饰的EPCs诱导炎症后细胞间黏附因子1(intercellularadhesionmolecule-1，ICAM-1)、血管细胞黏附因子1(vascularcelladhesionmolecule-1，VCAM-1)的表达水平，评价Ang-1对炎症损伤后EPCs的修复作用。 方法：体外分离 ...
宋晶金
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Integrative Conservation, Volume 4, Issue 3, Page 464-475, September 2025.This study investigates the diversity, conservation status, distribution, and discovery rate of 84 Cyrtodactylus species in Indochina. Despite rising discovery rates, many species are unassessed, with over half unprotected and 90.5% endemic. This study suggests expanding protected areas and implementing an integrated approach to conservation with IUCN ...
Matilda Julia Lasota +6 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2000 【目的】对Hela 细胞端粒酶进行活性重组并探讨其重组特异性。【方法】以RT-PCR 法从纯化的人端粒酶复合 体中扩增人类端粒酶RNA(hTR)基因片段, 将其克隆至含有SP6 启动子的pGEM3f +质粒中, 构建hTR 的体外转录体系以获 得体外合成的hTR。与端粒酶蛋白组分进行活性重组。四膜虫端粒酶RNA 及16S rRNA 作为重组反应对照组, 以探测其重 组特异性。【结果】经RT-PCR 扩增出450 bp 片段;体外转录重组载体经酶切图谱和PCR 扩增鉴定构建成功;体外转录的 ...
周俊宜, 罗超权
doaj
Integrative Conservation, Volume 4, Issue 3, Page 416-429, September 2025.Staghorn ferns are among the most highly valued ornamental plants but several species experience major extinction threats. Here we establish a DNA barcoding reference dataset to support reliable identification of cultivated staghorn ferns to secure species identity of individuals at all life stages that are used in ex situ and in situ conservation of ...
Kaikai Wang +6 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 1997 摘 要 建立泌尿生殖系统沙眼衣原体感染阳性标本直接基因分型方法。先用敏感的扩增沙眼衣原体特异质粒 的引物扩增500份临床标本, 初筛选出100份阳性标本再用扩增沙眼衣原体主要外膜蛋白( MOM P)基因的引物扩 增, 并用嵌套式PC R使阳性标本能扩增出MOMP基因, 对获得的MOMP基因用限制性酶切片段长度多态性 ( RFLP)方法进行基因分型,并用银染观察结果。其中E型比例最高,占47% ; F型为16% ; Da、G型均为6% ; Ba、D 型各占5% ; H型及K型均为1% ,混合型K /
汪玎妍 郭辉玉 罗宪玲 蒋文玲 李质怀
doaj
Ex vivo differentiation of amniotic membrane stromal cells into neural cells using tissue culture method [PDF]
, 2012 目的体外组织培养法诱导羊膜基质细胞向神经细胞分化。 方法将新鲜去上皮羊膜（dAM-0W）和完整羊膜（iAM-0W）固定于特制的培养插件(insert)上进行组织培养，采用神经细胞分化培养基诱导羊膜基质细胞的分化。在培养1周、4周时进行Hoechst染色，观察基质细胞的增殖情况。取新鲜羊膜（dAM-0W）、培养4周的去上皮羊膜（dAM-4W）及完整羊膜（iAM-4W），分别提取RNA进行实时荧光定量PCR检测、制备组织块进行免疫荧光染色、提取蛋白质进行WesternBlot印迹检测 ...
肖华强
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