INDEX life time

Table 3. Target reliability index (life-time, examples) in accordance with ISO 2394 (1998).

Consider now a one-dimensional lattice of parameter /. The distance of each atomic jump depends on the rate of de-excitation once the adatom is excited and is translating along the lattice. This de-excitation process can be described by a characteristic life time r in the symmetric random walk, as in many other solid state excitation phenomena. The initial position of the adatom is taken to be the origin, denoted by an index 0. The adatom accomplishes a jump of distance il if it is de-excited within (i — i)l and (i + i)l, where / is the lattice parameter, or the nearest neighbor distance of the one-dimensional lattice, and i is an integer. The probability of reaching a distance il in one jump is given by... 

To a plastic producer (i.e. processor), melt index is one property that is needed in order to evaluate whether the same process can be used irrespective of whether it uses virgin or recycled polymers. This will tell if it is possible to process the recycled polymeric materials in the same set-up as usual. Several other properties are needed in order to quality mark the materials. The melt index is related to what final tensile properties a product obtains, this in turn has an impact on the expected life-time. The purity of a recyclate stream with respect to the amount of foreign polymer in the stream has an impact on melt-index, but will also be an important factor for the final mechanical properties. Another very important property is the amount of low molecular weight compounds, which may be of vastly different types. Typically such an analysis will show the presences of additives and their degradation products, degradation products of the polymeric matrices, traces of solvents, initiators, or catalysts, compounds related to the use of the plastics and others. 

The index 100 of the of the GWP value is the time period during which effects are considered. The estimated life time of CO in the atmosphere is approximately 120 years. 

Here v is the wave number, e (v) the molar decadic extinction coefficient of the acceptor and (v) the spectrum of the donor emission (fluorescence or phosphorescence) measured in quanta per wave-number interval and normalized to unity on the same scale. N is the number of molecules per millimole, n the refractive index of the surrounding medium and the intrinsic life time of the excited donor state, k is a numerical factor representing the orientation dependence of dipole-dipole interaction. Its average is /2/3 = 0.816 for fast Brownian rotation of both molecules and 0.690 for random but rigid orientations . 

Xg = 2 Cg/(2Cg + Cj ) is an index for the degree of segregation of the fluid, as explained above. With initial concentrations after mixing of 0.5 mol.m both reaction are complete after 10 ms and the half life-time of B is 0.3 ms. In Fig. 15 Xg is plotted against 2 Bo surprising that... 

Cross-comparing the risks of various activities is difficult because of the lack of a common basis of comparison, however Cohen and Lee, 1979 provide such a comparison on the basis of loss of life expectancy. Solomon and Abraham, 1979 used an index of harm in a study of 6 occupational harms - three radiological and three nonradiological to bracket high and low estimates of radiological effects. The index of harm consists of a weighting factor for parametric study the lost time in an industry and the worker population at risk. The conclusions were that the data are too imprecise for firm conclusions but it is possible for a radiation worker under pessimistic health effects assumptions to have as high index of harm as the other industries compared. 

As for the tenacity, which describes the fiber s resistance to the action of the tensile force, the quantitative index assumed most often is the tensile strength (crj (cN/tex). For the quantitative assessment of tenacity an index of mechanical long life (t) is used, proposed by Zurkow and Abasow [46,47]. This index defines the time after which, when applying a definite tensile strength and a definite temperature, the fiber breaks. 

Multidimensional assessment tools obtain information about the pain and impact on quality of life, but are often more time-consuming to complete. Examples of these types of tools include the Initial Pain Assessment Tool, Brief Pain Inventory, McGill Pain Questionnaire, the Neuropathic Pain Scale, and the Oswestry Disability Index.29-33... 

Implementation of dissolution testing by BP was in a tiered program similar to that employed at the time by USP. For the first category, products would conform to 75% release in 45 min. Where the drug had a narrow therapeutic index and should not release too rapidly, was known to exhibit a brief plasma half-life, or have site-specific absorption, additional testing to satisfy the need for greater control would be considered. Dissolution tests were included in 1980 for 14 tablet and four capsule monographs (15,16). 

Butorphanol tartrate is a weak partial p-receptor agonist, 3.5-5 times as potent as morphine. The incidence of psychotomimetic effects is relatively low. The recommended doses are 1-4 mg intramuscularly every 3-4 h or 0.5-2 mg intravenously. Respiratory depression produced by butorphanol 2 mg IV is similar to that of 10 mg morphine. However, there is a ceiling effect for respiratory depression, and near-maximum depression occurs after 4 mg in normal adults. In healthy volunteers, butorphanol 0.03-0.06 mg-kg-1 produces no significant cardiovascular changes. However, in patients with cardiac disease, progressive increases in cardiac index and pulmonary artery pressure occur, and butorphanol should be avoided in patients with recent myocardial infarction. Butorphanol is metabolised mainly in the liver to inactive metabolites. The terminal half-life is 2.5-3.5 h. 

Research articles of interest to biochemists may appear in many types of research journals. Research libraries do not have the funds necessary to subscribe to every journal, nor do scientists have the time to survey every current journal copy for articles of interest. Two publications that help scientists to keep up with published articles are Chemical Titles (published every 2 weeks by the American Chemical Society) and the weekly Current Contents available in hard copy and computer disks (published by the Institute of Science Information). The Life Science edition of Current Contents is the most useful for biochemists. The computer revolution has reached into the chemical and biochemical literature, and most college and university libraries now subscribe to computer bibliographic search services. One such service is STN International, the scientific and technical information network. This on-line system allows direct access to some of the world s largest scientific databases. The STN databases of most value to life scientists include BIOSIS Pre-views/RN (produced by Bio Sciences Information Service covers original research reports, reviews, and U.S. patents in biology and biomedicine), CA (produced by Chemical Abstracts service covers research reports in all areas of chemistry), MEDLINE, and MEDLARS (produced by the U.S. National Library of Medicine and Index Medicus, respectively cover all areas of biomedicine). These networks provide on-line service and their databases can be accessed from personal computers in the office, laboratory, or library. Some... 

HE Half-life of cooling water chemical additives in the system (holding time index)... 

Holding time index. Depletion rate. Time taken for initial concentration of chemical additive in cooling water to fall by half. Half-life (HL) = 0.639 x volume (V)/bleed (B). 

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