One-time orders

STAT order A one-time order given as soon as possible. 

One-time order This is a single dose given at a particular time. 

Time-resolved fluorescence is perhaps the most direct experunent in the ultrafast spectroscopist s palette. Because only one laser pulse interacts with the sample, the mediod is essentially free of the problems with field-matter time orderings that arise in all of the subsequently discussed multipulse methods. The signal... 

In some Hquid crystal phases with the positional order just described, there is additional positional order in the two directions parallel to the planes. A snapshot of the molecules at any one time reveals that the molecular centers have a higher density around points which form a two-dimensional lattice, and that these positions are the same from layer to layer. The symmetry of this lattice can be either triangular or rectangular, and again a positional distribution function, can be defined. This function can be expanded in a two-dimensional Fourier series, with the coefficients in front of the two... 

An alternative chewing gum base is obtained from jelutong, a mixture of polyisoprene and resin obtained from latex of the Dyera costulata. This tree is found in many countries but Borneo is the principal commercial source. At one time jelutong was an important rubber substitute and 40000 tons were produeed in 1910. Production in recent years has been of the order of 5000 tons per annum, mainly for chewing gum. 

Consecutive reactions involving one first-order reaction and one second-order reaction, or two second-order reactions, are very difficult problems. Chien has obtained closed-form integral solutions for many of the possible kinetic schemes, but the results are too complex for straightforward application of the equations. Chien recommends that the kineticist follow the concentration of the initial reactant A, and from this information rate constant k, can be estimated. Then families of curves plotted for the various kinetic schemes, making use of an abscissa scale that is a function of c kit, are compared with concentration-time data for an intermediate or product, seeking a match that will identify the kinetic scheme and possibly lead to additional rate constant estimates. 

As defined above, F consists of three operators acting simultaneously on the state G >. More generally, one may prescribe any of 10 possible time-orderings to the operators H, and. That is, specify certain intermediate state dependencies, so that, for example FilG >= (H )( G >) would in general be expected to yield results different from, say, F2 G > H( ( G>)). While we will be solely concerned with the synchronous time ordering defined above, we do not expect the qualitative results to depend critically on this choice. 

By introducing the time-ordering chronological operator8 P which rewrites a product of time labeled operators as the product of these same operators ordered according to their time label, the one with the earliest time label standing farthest to the right, we can rewrite the expansion (10-151) in the form... 

Sngle order An order to administer the drug one time only. 

Any numerical experiment is not a one-time calculation by standard formulas. First and foremost, it is the computation of a number of possibilities for various mathematical models. For instance, it is required to find the optimal conditions for a chemical process, that is, the conditions under which the reaction is completed most rapidly. A solution of this problem depends on a number of parameters (for instance, temperature, pressure, composition of the reacting mixture, etc.). In order to find the optimal workable conditions, it is necessary to carry out computations for different values of those parameters, thereby exhausting all possibilities. Of course, some situations exist in which an algorithm is to be used only several times or even once. 

All bench-mounted equipment should be listed with its dimensions, which can be taken from measurements or from catalog data. It should be noted which instruments may have to be put at a certain minimum distance from other objects in order to avoid interference or allow for servicing. Work space should be allowed next to each instiiiment for samples, notebooks, etc. This space may be considerable in case of an analytical instrument on which many samples are to be tested at one time. Space sharing should be discouraged, with the required work space next to an instrument reserved for that alone. Sinks and fume hoods should also be included in this list, with an allowance of at least 18 inches of free space on each side of a sink. 

The critical radius at Tg is a multiple of Droplets of size N > N are thermodynamically unstable and will break up into smaller droplets, in contrast to that prescribed by F N), if used naively beyond size N. This is because N = 0 and N = N represent thermodynamically equivalent states of the liquid in which every packing typical of the temperature T is accessible to the liquid on the experimental time scale, as already mentioned. In view of this symmetry between points N = 0 and N, it may seem somewhat odd that the F N) profile is not symmetric about. Droplet size N, as a one-dimensional order parameter, is not a complete description. The profile F N) is a projection onto a single coordinate of a transition that must be described by order parameters—the... 

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