【摘 要】
：
There are many kinds of natural products, some of them play important roles in plant physiology and biochemistry (e.g.gibberellins, sterols), and some of them h
【机 构】
：
School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China;State Key Labor
论文部分内容阅读
There are many kinds of natural products, some of them play important roles in plant physiology and biochemistry (e.g.gibberellins, sterols), and some of them have good pharmacological activities for clinical application (e.g.tanshinone, ginsenosides).For the past few years, the biosynthetic pathway of many natural products had been completely analyzed, such as ginsenosides [1], vincristine [2, 3] and saponins [4].And many great achievements also had been made in the analysis of the biosynthetic pathway of other natural products, such as tanshinone [5], triptolide [6] and celastrol [7].Nevertheless, the analysis of biosynthetic pathway ofnatural products also faces many challenges.
其他文献
研究背景与目的:危重病侵袭性真菌感染(invasive fungalinfection, IFI)发生率高,病死率高,日益受到关注。随着免疫抑制人群增加,唑类抗真菌药物作为预防或经验性治疗在临床
目的:总结使用脐带双极电凝术对单绒毛膜双胎之异常胎进行选择性减胎的经验,探讨单绒毛膜双胎减胎术的临床应用。 方法:3例中孕期诊断为单绒毛膜双胎一胎异常的病例,其中2
目的:评价磁共振成像(Magnetic resonance imaging, MRI)对羊水过少时胎儿畸形的诊断价值。 方法:回顾性分析18例超声(US)筛查出羊水过少胎儿的MPI,并将US、MRI结果与引产
As one of the four major classes of biomolecules (carbohydrate,protein,nucleotide,and lipid),carbohydrates are the most prominent features of the cell's exterio
心脏横纹肌瘤是胎儿期或婴儿期最常见的原发性心脏肿瘤,常伴有结节性硬化症,预后差。产前筛查对早发现、早干预胎儿心脏横纹肌瘤有重要意义,其主要手段为彩色多普勒超声心动
目的:通过对孕妇行孕中期血清生化指标筛查,发现孕期胎儿染色体及神经管发育异常,降低出生缺陷发生率。
方法:采用时间分辨免疫荧光法(DELFLA)Eu和Sm双标记试剂盒,测定孕
目的:探讨重度子痫前期合并低蛋白血症对围产结局的影响。
方法:回顾性分析我院2000年1月～2006年3月收治的233例重度子痫前期患者的临床资料,按血清白蛋白检测结果将其分
目的 探讨双胎儿围产结局.方法 回顾性分析658例双胎儿的临床资料,比较不同双胎类型、分娩方式、孕周及两胎儿分娩间隔时间对双胎儿预后的影响,合并双胎妊娠特有合并症(发育不同一、双胎输血综合征)者的预后.结果 单卵双胎围产儿病死率为53.69‰(16/298),高于双卵双胎的27.11‰(9/332;U=2.35,P＜0.05).无论胎位如何,剖宫产儿各项合并症的发生率低于阴道分娩儿.两胎儿分娩间隔
为了建设祖国边疆,为了帮助边疆少数民族地区发展医疗卫生事业,我院首批赴西藏阿里地区医疗队十一名同志和第五批赴云南西双版纳地区医疗队二十六名同志,带着伟大领袖毛主席
目的 比较甘肃不同产地党参中党参炔苷的含量,为甘肃道地药材党参的适宜栽培区域研究提供资料.方法 采用HPLC法,色谱条件为CAPCELL PAK C18-MGⅡ柱(250 mm×4.6 mm,5μm);乙