Asterisk condition

THE ASTERISK CONDITION. The state of the fluid moving at its acoustic velocity is important in some processes of compressible-fluid flow, The condition where u = a and = 1 is called the asterisk condition, and the pressure, temperature, density, and enthalpy arc denoted by p, T, p, and H at this state. 

When the gas leaves the pipe at the asterisk condition, where N aj, = 1-0. 

Figure 10.3 Gas cliromatograms of a cold-pressed lemon oil obtained (a) with an SE-52 column in the stand-by position and (b) with the same column showing the five heart-cuts (c) shows the GC-GC chiral chromatogram of the ti ansfeired components. The asterisks in (b) indicate electric spikes coming from the valve switcliing. The conditions were as follows SE-52 pre-column, 30 m, 0.32 mm i.d., 0.40 - 0.45 p.m film tliickness cairier gas He, 90 KPa (stand-by position) and 170 KPa (cut position) oven temperature, 45 °C (6 min)-240 °C at 2 °C/min diethyl-tert-butyl-/3-cyclodextrin column, 25 m X 0.25 mm i.d., 0.25 p.m film thickness cairier gas He, 110 KPa (stand-by position) and 5 KPa (cut position) oven temperature, 45 °C (6 min), rising to 90 °C (10 min) at 2 °C/min, and then to 230 °C at 2 °C/min. Reprinted from Journal of High Resolution Chromatography, 22, L. Mondello et al, Multidimensional capillary GC-GC for the analysis of real complex samples. Part IV. Enantiomeric distribution of monoterpene hydrocarbons and monoterpene alcohols of lemon oils , pp. 350-356, 1999, with permission from Wiley-VCH.

Fig. 3 Solid state 31P NMR spectra of fosinopril sodium acquired under single pulse, high-power proton decoupling and various conditions of magic-angle spinning (A) static, (B) 2.5 kHz, (C) 4.0 kHz, (D) 5.0 kHz, and (E) 6.0 kHz. The isotropic chemical shift is designated by an asterisk. (From Ref. 15.)...

The two MOs of a diatomic molecule are classified as a, tt, 8, etc., according to whether the projection of angular momentum along the molecular axis is 0, 1, 2, etc. (in units of hUir). Moreover, the antibonding condition is indicated by an asterisk for... 

Fig. 9 Electropherograms showing 3 nM fluorescently labeled 11-mer in the absence (A) and in the presence (B) of 0.7 /j,M SSB protein in the running buffer. The conditions used were as follows separation capillary, 35 cm, 20-/xm i.d. running buffer, 25 mM disodium tetraborate (pH 9.1) separation voltage, 25 kV excitation wavelength, 488 nm emission wavelength, 515 nm and temperature, 25 (1°C. Approximately 1 nL of sample solution was injected electrokinetically. The asterisk indicates the migration time of the solvent, The traces Iv and Ih, corresponding to vertically and horizontally polarized fluorescence intensities, respectively, are shown separated for clarity. (From Ref. 48.)...

A tabular search using the Fact Editor for the conditions [bp > -40] AND [bp < 0] yields 462 hits in 15 s. Since most of the hits contain heteroatoms other than fluorine, it would be better to reissue the search command for compounds that do not contain any nitrogen [bp > - 40] AND [bp < 0] NOT [ N ], which yields 317 hits in 156 s. The asterisk indicates the wild card that stands for any number of characters of any kind, and the is for a text string. When we refine it further to exclude chlorine... 

Let us see where this scheme may bring us, and for this purpose refer to Figure 4.7. This shows a small library of oligopeptides, where one (or more) of these products, indicated in the figure with an asterisk, is endowed with peptidase activity. These peptides then, under the reaction conditions, can catalyze fragment condensation in a specific way - for example of those peptides with a terminal aromatic residue. Following the first condensation step, the catalytic center is inserted into a longer polypeptide, with retention of the catalytic activity. 

Figure 4.7 Fragment condensation of short, prebiotically formed, oligopeptides. The asterisk indicates the catalytically active peptide, which can induce the fragment condensation by reverse peptide hydrolysis n peptides (e.g., ten residues long) react with each other to build ideally 20-peptides, and of these, m react further (to build ideally 40-peptides, of course in practice all possible mixtures may be present), and m are eliminated because of being unusable (e.g., insoluble) under the contingent conditions - and so on.

Further, the moments for F will be denoted by an asterisk. Because of the conditions both F and FM satisfy, those of order zero and unity are the same. On the other hand, using formulas for the normal law, we have... 

The procedures for sample preparation and the operating conditions of the GC-MS system have been described elsewhere (9-12. 14-16 ten Haven et al., Proc. ODP. Sci. Results. 112. in press). All GC-MS data had been stored on magnetic tapes, but in some cases could not be retrieved. In these cases, indicated by an asterisk in Table I, old hardcopy files were checked for the occurrence of OSC. Mass chromatograms of characteristic ions (m/z 87, 97, 98, 101, 111, 115, 125, 129, 139, 195, 265, 331, 341), in combination with published information on relative retention times (3-5. g), were used to identify the various compounds. 

Pathogenic Action of Bacteria That Cause Gas Gangrene The highly pathogenic anaerobic bacterium Clostridium, perfringens is responsible for gas gangrene, a condition in which animal tissue structure is destroyed. This bacterium secretes an enzyme that efficiently catalyzes the hydrolysis of the peptide bond indicated by an asterisk ... 

Fig. 6.6. Spectral response of similar photodiodes ITO/PEDOT/PEOPT/Ceo/Al with different thicknesses of the Ceo layer 31 nm (circles), 72 nm (squares), and 87 nm (solid line), and the best fit to the model (dashed line). Spectra were taken from these devices under short-circuit conditions. Asterisks mark the prediction of the model in Fig. 6.4 at wavelength 460 nm...

Under the conditions described above but using two moles of diol per mole of tellurium tetraisopropoxide, tellurium bis[a,viscous liquids or white solids. The insolubility of some of these compounds (marked by an asterisk in the list below) in benzene suggests that these esters are polymeric1. 

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