Regions of tight contact between adjacent epithelial cells; this contact gives strength to tissues and enables cells of a tissue to function together. There are two types of desmosomes: belt desmosomes are bands of attachment that encircle the cell,and sp...[继续阅读]

    A venereal disease caused by the spirochete,Treponema pallidum. If left untreated,the disease may cause blindness and neurological symptoms,including a syndrome characterized by a loss of motor control known as general paresis. 一种由梅毒螺旋体引起的性病。如不治疗,此病可引起失明...[继续阅读]

    The number of independent variables in an experiment.一个实验中独立变量的数目。...[继续阅读]

    A nylon or nitrocellulose membrane onto to which nucleic acids or proteins are transferred for the purpose of hybridization or interaction with antibodies. See NORTHERN BLOT and SOUTHERN BLOT HYBRIDIZATION.将核酸或蛋白质转移到尼龙膜或硝酸纤维素膜上,用于杂交或与抗体反应。...[继续阅读]

    A sensitive device for detecting single emissions of particles produced by radioactive decay. 一种用于检测放射性衰变所产生的单个放射粒子的灵敏实验装置。...[继续阅读]

    A membranous structure that surrounds the myofibrils in muscle tissue. The sarcoplasmic contains calcium pumps that regulate the level of calcium ion (Ca2+ ) in muscle tissue.在肌肉组织中包绕着肌原纤维的膜性结构。肌浆网中存在着可以调控肌肉组织中钙离子水平的钙泵...[继续阅读]

    A mixture of polymeric chains in which individual chains differ from one another by virtue of the linear arrangement of the monomers that make up the polymer. For example,a combinatorial peptide library would contain polypeptides that are created from the...[继续阅读]

    The property of absorption of light by a solution of any given substance.The decrease in intensity of a light beam at a certain wavelength as it passes through a solution over a certain distance is proportional to the molar concentration of the solution.S...[继续阅读]

    A single-stranded RNA bacteriophage.一种单链RNA噬菌体。...[继续阅读]

    Bacteria that normally live in the soil as individual cells but that,under conditions where nutrients become limiting,form multicellular aggregates similar to primitive multicellular organisms.以单细胞形式正常生存于土壤中的细菌。但当土壤中的营养有限时,与原始多细胞生物...[继续阅读]