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...[繼續(xù)閱讀]

    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. 一種由梅毒螺旋體引起的性病。如不治療,此病可引起失明...[繼續(xù)閱讀]

    The number of independent variables in an experiment.一個(gè)實(shí)驗(yàn)中獨(dú)立變量的數(shù)目。...[繼續(xù)閱讀]

    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.將核酸或蛋白質(zhì)轉(zhuǎn)移到尼龍膜或硝酸纖維素膜上,用于雜交或與抗體反應(yīng)。...[繼續(xù)閱讀]

    A sensitive device for detecting single emissions of particles produced by radioactive decay. 一種用于檢測(cè)放射性衰變所產(chǎn)生的單個(gè)放射粒子的靈敏實(shí)驗(yàn)裝置。...[繼續(xù)閱讀]

    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.在肌肉組織中包繞著肌原纖維的膜性結(jié)構(gòu)。肌漿網(wǎng)中存在著可以調(diào)控肌肉組織中鈣離子水平的鈣泵...[繼續(xù)閱讀]

    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...[繼續(xù)閱讀]

    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...[繼續(xù)閱讀]

    A single-stranded RNA bacteriophage.一種單鏈RNA噬菌體。...[繼續(xù)閱讀]

    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.以單細(xì)胞形式正常生存于土壤中的細(xì)菌。但當(dāng)土壤中的營(yíng)養(yǎng)有限時(shí),與原始多細(xì)胞生物...[繼續(xù)閱讀]