Centrifugation analysis

The Bottle Centrifuge. Analysis of the performance of a botde centrifuge is based on the model shown in Figure 1. A soHd or Hquid particle is considered in an initial position, X, at a radius, r, from the axis of rotation. If equation 2 is appHed to this specific particle, assuming that = dr/dt then... 

Blood Extraction with toluene + HCI centrifugation analysis of toluene layer GC/FID 100 pg/L 98-100 Jirka and Bourne 1982... 

Tissues (bone marrow, fat) Homogenization with internal standard centrifugation analysis of supernatant GC/MS-SIM NR NR Rickert et al. 1979... 

Tissues (lung, liver) Homogenization in buffer centrifugation analysis of supernatant RID-preparative HPLC/UV 20 pg/g NR Bechtold et al. 1988... 

DNA was extracted from the bacteria at various times after they were transferred from a to a N medium and centrifuged. Analysis of these samples showed that there was a single band of DNA after one generation. The density of this band was precisely halfway between the densities of the DNA and DNA hands (Figure 515). The absence of DNA indicated that parental DNA was not preserved as an intact unit after replication. The absence of DNA indicated that all the daughter DNA derived some of their atoms from the parent DNA. This proportion had to be half because the density of the hybrid DNA band was halfway between the densities of the dNA and DNA bands. 

Sample Number Dean-Stark Centrifugation Analysis Method % Difference ... 

El 14 Gerbet, D., Richardot, P., Auget, J.-L., Maccario, J., Cazalet, C.,Raichvarg, D., Ekindjian, O.G. and Yonger, J. (1983). New statistical approach in biochemical method-comparison studies by using Westlake s procedure, and its application to continuous-flow, centrifugal analysis, and multilayer film analysis techniques. Clin. Chem. 29, 1131-1136. 

McDowell TL. Benzethonium chloride method for proteins adapted to centrifugal analysis. Chn Chem 1985 31 864-6. 

Incubation of hair follicle with (-)-B[a]P-7,8-diol for 24 hours addition of acetone centrifugation analysis of supernatant... 

DNA was extracted from the bacteria at various times after they were transferred from a N to a N medium and centrifuged. Analysis of these samples showed that there was a single band of DNA after one generation. The density of this band was precisely halfway between the densities of the... 

This section addresses two basic principles of classification—sedimentation and field-flow fractionation—and the corresponding sizing techniques. Additionally, a chromatographic technique is briefly introduced. The focus lies on sedimentation or centrifugation analysis, which corresponds to its practical relevance for the characterisation of coUoidal suspensions. 

The immediate result of centrifugation analysis is the temporal change or spatial distribution of the particle concentration. Time and space then correspond to values of the stationary settling velocity, which can be calculated via ... 

The Study further confirmed high agreement with the results of electron microscopy and centrifugation analysis. However, such agreement cannot be expected for non-spherical particles. That is because the hydrodynamic diameter deviates firom e.g. Stokes diameter. Additionally, there is a significant contribution... 

Fig. 4.30 Measured size distributions from optical centrifugation analysis (OCA) and dynamic light scattering (90° and 173°), i.e. distribution of the effective hydrodynamic diameter Xi, efl 9o /i73° weighted by seattering intensity as well as of the Stokes diameter JtstokEs weighted by optical extinction pyrogenic silica (BET = 50 m /g)...

The blending capability of the instrument was tested by carrying out a gravitational analysis of BCR 70 down to 2p,m and determining the sub-2 lm distribution by centrifugal analysis. The data are presented in Figures 6 7 and the deviation from standard data is shown in Figure 8 and Table 3 with a mean value of 6.28%. 

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