نتایج جستجو برای: centrifugation

تعداد نتایج: 11927  

Journal: :European journal of biochemistry 1972
H Bloemendal T Berns A Zweers H Hoenders E L Benedetti

2014
Aleksander Cvjetkovic Jan Lötvall Cecilia Lässer

BACKGROUND Extracellular vesicles (EV), the collective term for vesicles released from cells, consist of vesicle species ranging in size from 30 nm to 5 µm in diameter. These vesicles are most commonly isolated by differential centrifugations, which pellets particles based on their differential movement through the liquid medium in which they are immersed. Multiple parameters, including the uti...

Journal: :Clinical chemistry 1981
C G Duck-Chong L M Brown W J Hensley

In most methods proposed for the assessment of fetal lung maturity, amniotic fluid is subjected to a preliminary low-speed centrifugation in an attempt to separate whole cells and cell debris from lung-derived surfactant phospholipid (lamellar body phospholipid). However, because lamellar body phospholipid is present in amniotic fluid in a membranous or particulate form, it is also partly sedim...

Journal: :Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment 2016
Raquel B Gómez-Coca María Del Carmen Pérez-Camino Wenceslao Moreda

Olive fruits contain an n-alkane series of saturated hydrocarbons mainly in the pulp. Lower amounts of a complex mixture of paraffins, unresolved by gas chromatography (UCM--unresolved complex mixture), have been found in cuticle, stone (woody shell and seed), olive leaves, and talc used as an aid to olive oil extraction. The amounts of both kinds of hydrocarbons are related to the olive cultiv...

2010
Emily Dey-Hazra Barbara Hertel Torsten Kirsch Alexander Woywodt Svjetlana Lovric Hermann Haller Marion Haubitz Uta Erdbruegger

The clinical importance of microparticles resulting from vesiculation of platelets and other blood cells is increasingly recognized, although no standardized method exists for their measurement. Only a few studies have examined the analytical and preanalytical steps and variables affecting microparticle detection. We focused our analysis on microparticle detection by flow cytometry. The goal of...

2003
ARTHUR B. SCHNEIDER HAROLD EDELHOCH

A method of evaluating the iodine distribution in thryroglobulin has been developed. It is based on the increase in density that occurs when iodine is incorporated into proteins. Resolution of iodinated species is obtained by equilibrium centrifugation in a 34.5% (w/w) RbCl density gradient (isopycnic centrifugation) in either the analytical or preparative ultracentrifuge. The equilibrium in 34...

2003
A. ROBERT NEURATH TADEUSZ J. WIKTOR

NEURATH, A. ROBERT (The Wistar Institute, Philadelphia, Pa.), TADEUSZ J. WIKTOR, AND HILARY KoPROWSKI. Density gradient centrifugation studies on rabies virus. J. Bacteriol. 92:102-106. 1966.-Cesium chloride density gradient centrifugation of rabies virus revealed a heterogeneous population of infectious virus particles, the majority of which showed a density of 1.20 g/ml. From results obtained...

Journal: :Journal of virology 1968
R M McCombs W E Rawls

Rubella virus was centrifuged in sucrose density gradients. One of two densities could be ascribed to the virus, depending upon the suspending medium used. The virus was found at a density of 1.16 g/cm(3) after centrifugation for 18 hr in sucrose gradients prepared in distilled water. By contrast, when the sucrose gradients were prepared in tris(hydroxymethyl)aminomethane (Tris)buffer containin...

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