21 research outputs found

    The molecular mechanism of Mycoepoxydiene and 17-β-estradiol in suppressing osteoclast differentiation and osteoclastogenesis

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    破骨细胞是骨髓来源性的多核细胞,它的功能是吸收陈旧骨,并在骨重建中发挥着重要的作用。破骨细胞的功能异常往往导致骨质疏松,类风湿性关节炎等疾病,目前治疗骨质疏松类疾病的靶点是破骨细胞。 一方面,环氧二烯(Mycoepoxydiene,MED)是一个以含有氧桥的八元环二烯为骨架的化合物,是红树林海洋真菌菜豆间坐壳菌(Diaporthesp.HLY-1)的次级代谢产物。研究表明环氧二烯具有许多生物学功能,例如抗肿瘤活性,抑制炎症发生等,而骨质疏松症的发生与机体炎症有着密切的关系,但是该化合物在骨质疏松发生中的作用尚不清楚。在本文中,我们利用破骨细胞体外诱导系统和卵巢切除引发的骨质疏松症为模型。通过...Osteoclasts are multinucleated bone-resorbing cells, which play a crucial role in bone remodeling. Dysfunction of osteoclast can lead to osteoporosis and rheumatoid arthritis etc. In present, osteoclast is the main target for treating these diseases. Mycoepoxydiene (MED) is a compound containing an α,β-unsaturated δ-lactone moiety and an oxygen-bridged cyclooctadiene core. It is isolated from the...学位:理学博士院系专业:生命科学学院生物学系_细胞生物学专业学号:2172009015358

    汉族人群Y染色体多拷贝基因座DYS464遗传多态性

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    【目的】 研究Y染色体多拷贝基因座DYS464遗传多态性在汉族群体中的分布规律。【方法】 选择106例汉族无亲缘关系男性个体作为研究对象,荧光标记引物PCR扩增DYS464基因座片段,ABl377自动测序仪上变性聚丙烯酰胺凝胶电泳分析PCR产物,并对不同重复序列分别测序。【结果】 DYS464基因座在106例汉族男性无关个体中发现有8种片段。变异11~18次。根据其中任意4种片段的组合,即片段大小和峰高的比率来命名等位基因,E-型命名方法,观察到61种等位基因,其中36种等位基因只出现1次。基因多样性和个体识别力分别为0.9853和0.9760,比目前报道的单个Y-STR基因座的多态性都高。【结论】 多拷贝基因座DYS464具有高度多态性,非常适于法医学实践和人类进化的研究

    陆地棉体细胞再生植株速成法

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    陆地棉体细胞再生植株速成法

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    Synthesis and Characterization of Spherical Microporous Silica

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    [中文文摘]以正硅酸乙酯作硅源,嵌段共聚物为模板剂,采用沉淀法合成均匀的实心球形二氧化硅微孔材料,BET、FSEM和XRD等表面分析手段表征表明,我们合成的二氧化硅微孔材料具有3~4μm的粒径和不规则分布的0.9~1nm的孔径以及216±3.5m2/g的比表面积.实验结果还表明,在用非极性表面活性剂和非极性硅前驱体合成粒径均匀的多孔材料时,采取弱酸性的反应条件是有利的.[英文文摘]A kind of spherical microporous silica was synthesized by precipitation with the tetraethyl orthosilicate (TEOS) as a silica precursor and the block ploymer (P_(123)) as a template. The characterizations by the BET, FSEM and XRD showed that the spherical microporous silica has diameter of 3~4 μm, amorphous pore size of 0.9~1 nm and the specific area of 216±3.5 m~2/g. The results indicated that the weak acid condition was favorable for the synthesis of microporous silica microporous silica if the nonpolarity reagents were used.国家自然科学基金(20023001,20273053)资助

    微控制器MSP430F149在烤箱控制系统中的应用

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    介绍了美国Texas Instruments新一代16位Flash型MSP430F149系列微控制器的结构、特性和功能,阐述了基于该控制器的烤箱控制系统的硬件组成和软件架构,具有功能强、结构简单、可靠性高、抗干扰能力强、不需扩展外围器件等特点,满足了烤箱控制系统中对温度的测控要求

    缺氮培养对小球藻碳水化合物和油脂积累的影响

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    The metabolic changes of carbohydrate and oil accumulation under nitrogen starvation compared to nitrogen abundant cultivation in the Chlorella sp. was investigated. The results show that after nitrogen starvation, the cell growth is inhibited, and the s

    MSP430F149单片机及其在温度测控系统中的应用

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    介绍了德州仪器公司新一代16位Flash型MSP430F149系列单片机的结构、特性和功能,给出了基于该单片机控制系统的硬件组成和软件设计,具有功能强、结构简单、可靠性高、抗干扰能力强、不需扩展外围器件等特点,根据不同的需求可以应用于多种温度测控系统中

    EFFECT OF NITROGEN STARVATION CULTIVATION ON CARBOHYDRATE AND LIPID ACCUMULATION IN Chlorella sp.

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    The metabolic changes of carbohydrate and oil accumulation under nitrogen starvation compared to nitrogen abundant cultivation in the Chlorella sp. was investigated. The results show that after nitrogen starvation, the cell growth is inhibited, and the s
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