Conductivity at high pressure

The SP-PLP817 18 and PS-PLP171 techniques involve following the monomer conversion induced by a single laser pulse or a sequence of laser pulses. These experiments are usually conducted at high pressure beeause rates of termination are lower and sensitivities are somewhat higher. 7... 

Redaction of Imines. This catalyst system is very effective for the asymmetric hydrogenation of imines. For example, AL(1-cyclohexyl)ethylidenebenzylamine (as a mixture of anti and syn isomers) can be reduced in excellent yield and good enantiomeric excess (eq 3). The reaction must be conducted at high pressures in order to achieve maximum enantioselecdvity. This effect was found for several acyclic imines. 

Thermal conductivities at high pressures were measured by Bridgman with an apparatus consisting of two concentric copper cylinders contained in a pressure apparatus, and with a liquid film 0 04 cm. thick between them. The inner cylinder was electrically heated by an aaal wire and the temperatures on both sides of the liquid film were determined by thermocouples. It was found that k increased with pressure for all the liquids (including water) investigated, and at a decreasing rate. It decreased with tanperature, except in the case of water, when it increased. 

The synthesis of ammonia from the elements is conducted at high pressures and temperatures ... 

The process of hydrate formation is a heterogeneous process having similarities with crystallization processes. The difference in the two processes is that in the hydrate formation the solute (hydrate former) is supplied from another fluid phase (gas or liquid) to the aqueous liquid phase where it combines with water and crystallizes as solid hydrate. Also, the process is generally conducted at high pressures. It is because of these factors that the kinetics of hydrate formation and decomposition has been studied by only a few researchers. The similarities lie in the fact that the... 

LDPE was the first commercial PE, being introduced by Imperial Chemical Industries in 1938 [1-3]. Based on free-radical chemistry conducted at high pressure, the ICI process produces a wide variety of short- and long-chain branches. Even the branches can have branches, a structure sometimes described as "fuzz-ball" architecture. The structure hinders the entangling of the polymer molecule with neighbors, which profoundly influences the behavior of the material during and after molding. 

Typically, the major differences between these types of tests conducted at high pressure and in conventional low-pressure glassware are the special requirements and limitations imposed by the test vessel, vessel feed-throughs, and the high-pressure environment. However, these types of evaluations can be accomplished through careful planning and test vessel design. 

From these values it is clear that if we could reach equilibrium at 1 atm and room temperature, we would have almost complete conversion to NH3 the equilibrium is very favorable for the reaction. Alas, the reaction rate at this temperature is fsO, and no catalyst is known that will make the reaction go at temperatures below about 300°C. (Fame and fortune await the student who can find one ) Most industrial ammonia synthesis reactors operate in the temperature range 350-520°C, at which the rates of the reaction are satisfactorily rapid (in the presence of a catalyst). At this temperature and 1 atm the calculated equilibrium concentration of ammonia is small enough to make the reaction completely impractical. Industrially, the reaction is conducted at high pressures, as discussed below. 

The temperature dependent Hall effect [351] and the conductivity at high pressure [352] were also measured. Moreover, the high conductivity made it possible to measure the conductivity of the monolayer at the air-water interface [353,354]. A typical a-A isotherm is... 

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