Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Thermo, term

Dissolve NHS-LC-biotin (Thermo Fisher) in dry DMF at a concentration of 40 mg/ml. This stock solution is stable for reasonable periods, although long-term storage is not recommended. For use of the water-soluble sulfo-NHS-LC-biotin, a stock solution may be prepared in either organic solvent or water, or the solid reagent may be added directly to the reaction mixture. If a solution in water is made to facilitate the addition of a small quantity of reagent to a reaction, then the solution should be prepared quickly and used immediately to prevent hydrolysis of the NHS ester. Sulfo-NHS-LC-biotin may be dissolved in water at a concentration of 20 mg/ml. [Pg.514]

The production of a current of electricity by heating a junction formed by two dissimilar metals. For temperature measurement the metals are usually in the form of wires see Thermocouple) and the circuit has two junctions, the hot junction which is exposed to the temperature to be measured and the cold junction which is kept at a standard temperature. The thermo-electric effect is also termed the Seebeck Effect after its discoverer. [Pg.65]

The term interphase has been used to refer to the region which is formed as a result of the bonding and reaction between the fiber and matrix. The morphological or chemical composition and thermo-mechanical properties of the interphase are... [Pg.295]

The description of bonding at transition metal surfaces presented here has been based on a combination of detailed experiments and quantitative theoretical treatments. Adsorption of simple molecules on transition metal surfaces has been extremely well characterized experimentally both in terms of geometrical structure, vibrational properties, electronic structure, kinetics, and thermo-chemistry [1-3]. The wealth of high-quality experimental data forms a unique basis for the testing of theoretical methods, and it has become clear that density functional theory calculations, using a semi-local description of exchange and correlation effects, can provide a semi-quantitative description of surface adsorption phenomena [4-6]. Given that the DFT calculations describe reality semi-quantitatively, we can use them as a basis for the analysis of catalytic processes at surfaces. [Pg.256]

Blend systems with significantly improved thermo-oxidative performance can be achieved through incorporation of carefully designed polyimide molecules. As shown in Table 1, a copolyimide containing the sulfone and 6F moieties which exhibits a Tg above 300 °C (see Fig. 5), as well as extraordinary short-term thermo-oxidative stability can be synthesized. [Pg.304]

For over a century it has been known that two classes of variables have to be distinguished the microscopic variables, which are functions of the points of ClN and thus pertain to the detailed positions and motions of the molecules and the macroscopic variables, observable by operating on matter in bulk, exemplified by the temperature, pressure, density, hydro-dynamic velocity, thermal and viscous coefficients, etc. And it has been known for an equally long time that the latter quantities, which form the subject of phenomenological thermo- and hydrodynamics, are definable either in terms of expected values based on the probability density or as gross parameters in the Hamiltonian. But at once three difficulties of principle have been encountered. [Pg.38]

In the swollen state the situation is somewhat better. In many swollen networks Eq. (III-26) is reasonably well obeyed and the application of the thermo-elasticity equation yields a 3 In 0/3 T value which is reasonably independent of the deformation at least in good diluents (46). It should be pointed out that the experimental error in measuring the thermoelasticity of open, swollen systems is quite appreciable. This derives from the fact that the conversion term for an open system is more complicated because of the change in diluent content with temperature (86,87) ... [Pg.44]

Similar results were obtdby Avrami Jackson (Ref 90) who subjected HMX, RDX, HMX/RDX mixts and Comp B to low level long-term Co60 gamma radiation (225R/hr for 90, 120, and 150 days). Differential thermal analysis, thermo-gravimetric analysis, weight loss detn, and vac stability, infrared spectrometry, impact sen si-... [Pg.147]


See other pages where Thermo, term is mentioned: [Pg.229]    [Pg.85]    [Pg.2137]    [Pg.716]    [Pg.1034]    [Pg.168]    [Pg.123]    [Pg.1]    [Pg.70]    [Pg.71]    [Pg.101]    [Pg.737]    [Pg.69]    [Pg.419]    [Pg.180]    [Pg.1008]    [Pg.467]    [Pg.295]    [Pg.419]    [Pg.236]    [Pg.26]    [Pg.222]    [Pg.221]    [Pg.93]    [Pg.252]    [Pg.253]    [Pg.255]    [Pg.121]    [Pg.237]    [Pg.200]    [Pg.132]    [Pg.298]    [Pg.26]    [Pg.43]    [Pg.129]    [Pg.229]    [Pg.717]    [Pg.36]    [Pg.181]    [Pg.182]   
See also in sourсe #XX -- [ Pg.237 ]




SEARCH



Long-term prediction of thermo-oxidative degradation

Thermos

© 2024 chempedia.info