Rotor adapters

Fig. 14. solid-state NMR spectra of lead(II) nitrate at selected MAS speeds and ambient probe temperature in (left) a partially stabilized zirconia rotor and (right) a silicon nitride rotor. (Adapted with permission from ref. 183, Copyright 1995 John Wiley Sons Ltd.)... 

ATP, and p-ADP catalytic subunits with sites circled and the y-rotor. (Adapted from Urry. )... 

The simplest commercial devices of this type are essentially fans upon which water is sprayed. The unit shown in Fig. 17-54 is adapted to hght duty, and heavy dust loads are avoided to minimize buildup on the rotor. 

Adaptability Expander internals (rotors, impellers, inlet nozzles, ete.) ean be redesigned at moderate eost to aeeommodate ebanges in proeess eonditions, sueb as lower pressure, ebanging gas eomposition, and flowrate. 

Benchtop centrifuge lEC Model HN-SII 6 x 50-mL fixed-angle solid rotor, 15-mL adapter sleeves Beckman pH meter... 

As mentioned above, numerous rotors and vessel types for individual applications are available for the MicroSYNTH/ETHOS platform. Most of them are derived from the original digestion system and have been adapted for synthesis purposes. 

Fig. 4.3 I solated yields of Biginelli dihydropyrimidine products (Scheme 4.24 a) in different reaction vessels of a 36 vessel rotor (Fig. 3.7). Outer ring, vessels 1-20 inner ring, vessels 21-36). Aldehydes a, benzaldehyde b, 2-hydroxybenzaldehyde c, 3,4-dimethoxybenzaldehyde d, 3-nitrobenzaldehyde e, 2-chlorobenzaldehyde f, 4-(N,N-dimethylamino)benzaldehyde. Adapted from [85],...

Fig. 10 ROCSA pulse sequence based on Cn symmetry. The rectangular blocks in black represent jt/2 pulses. The recoupling period (q) comprises k cycles of Cnln. Each complete cycle of Cnln spans n rotor periods (nzR). The rf phase of each Cq subcycle is set equal to 2nq/n, where q is an index running from 0 to n — 1. Within each Cq subcycle, azR and bzR indicate the position and the duration of the POST composite pulse, respectively. We find that the solution (a, b) = (0.0329,0.467) is a favorable choice for the suppression of the homonuclear dipole-dipole interaction. The bracketed and subscripted values indicate the pulse length and rf phase in radians, respectively. (Figure and caption adapted from [158], Copyright [2003], American Institute of Physics)...

Tests with Aerosol Sprays. One of the chief means of applying concentrated oil sprays is in aerosol form. An aerosol generally remains suspended in the air for some time and is carried by normal wind or air currents. Aerosols are probably best adapted to interior applications but have been used with some success outdoors. They may be produced by liquefied-gas formulations released through capillary nozzles, by steam and air atomization, by centrifugal disks and rotors, by extremely high pressure, and by heat vaporization. 

Omnimixer (Sorvall) with adapter for 50-ml centrifuge tubes Centrifuge (with a Sorvall SS-34 rotor or equivalent)... 

Fig. 11.13. The mean rotational state < N2 > of rotor 2 if the sibling rotor 1 is produced in rotational state Ni comparison between experimental results and classical trajectory calculations. Here, N is the total angular momentum of OH(2II) excluding the spin. With increasing temperature of the H2O2 parent molecule the correlation gradually diminishes. The straight line indicates complete correlation. Adapted from Maul, Glaser, and Gericke (1989).

Refrigerated centrifuge (high speed) with rotors (up to 12,000 ) adapted to Eppendorf and Falcon (15-50 mL) tubes. 

Fig. 2.16. Schematic of the coupling of the nanocolumn to the injection valve [44], 1, nano-column (75 pm I.D. x 360 pm O.D.) 2, knurled nut and ferrules 3, fused-silica make-up adapter (split device 504 pm I.D.) 4, micro-injection valve (column port 250 pm i.d.) 5, rotor 6, outlet port of the make-up adapter.

This involves the use of a special rotor and the adaptation of the centrifuge for constant flow as for the zonal rotor. This is expensive, but once installed, reproducible separations of 108-109 cells can be achieved in under an hour and cells of all sizes (rather than just the smallest) are obtained. It is particularly suited to the isolation of Gl-phase cells from suspension cultures for which mitotic detachment procedures are not applicable. The separation chamber is kite-shaped with the buffer solution entering at the acute point on the rim of the centrifuge and leaving at the obtuse point towards the centre of rotation (Fig. 11.2). Thus the centrifugal forces on particles within the chamber are countered by the centripetal flow of buffer and particles come to equilibrium within the chamber. When equilibrium has been reached, the samples are pumped out, by increasing the rate of buffer flow, and collected. Meistrich et al. (1977) obtained 3 fractions of L-P59 mouse fibroblasts which were over 90% Gl-phase, 70% S-phase cells and 60% G2 + M-phase cells, respectively. 

Fig. 17. (a) 2D CSA-DECODER spectrum of polyethyleneterephthalate fibres oriented perpendicular to the rotor axis with a mixing time of 9.6 ms equivalent to a rotation of 125° (b) Simulation of the experimental data using a uniaxial distribution with FWHM = 25°. (Adapted from Lewis et al.260 with permission.)... 

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