Big Chemical Encyclopedia

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

Articles Figures Tables About

Purposeful effects

After the first report this isocyanide was not followed up until the studies of Armstrong and co-workers, which signaled the renaissance of 1-cyclohexen-l-yl isocyanide for synthetic purposes. Effectively, the Ugi-4CR adducts 5 obtained from 1 can be cleaved into the corresponding acids, esters, and thioesters 6 upon treatment with acids, alcoholic HC1, and thiols, respectively (Scheme 2.2) [6]. [Pg.33]

No Observed Effect Level (NOEL) This is the highest dose level of a chemical that, in a given toxicity test, causes no observable effect in the test animals. The NOEL for a given chemical varies with the route and duration of exposure and the nature of the adverse effect (i.e., the indicator of toxicity). The NOEL for the most sensitive test species and the most sensitive indicator of toxicity is usually employed for regulatory purposes. Effects considered are usually adverse effects, and this value may be called the No Observed Adverse Effects Level (NOAEL). [Pg.536]

Effects classes aim to facilitate an objective interpretation of model ecosystem experiments performed for regulatory purposes. Effect Class 1 = effects could not be demonstrated Class 2 = slight effects. ... [Pg.95]

Fungicides influence the microorganism population on the crop. This may affect the fermentation pathways during processing of food, for example, the production of cheese, soy sauce, or wine. Because of these side effects, not all fungicides can be used for every purpose. Effects on the taste and fermentation must be tested before a new fungicide can be used on crops that are processed by biotechnological methods. [Pg.396]

The top of the column is cooler than the bottom, so that the liquid stream becomes progressively hotter as it descends, and the vapor stream becomes progressively cooler as it rises. This heat transfer is accomplished by actual contact of liquid and vapor and, for this purpose, effective contacting is desirable. Each plate in the column is assumed to approach equilibrium conditions. This type of plate is defined as a theoretical plate, i.e., a plate on which the contact between the vapor and liquid is sufficiently good so that the vapor leaving the plate has the same... [Pg.128]

Pathogens employed as biological weapons can be used for both lethal and incapacitating purposes. Effects may be due to the produchon of Toxins (see Class Index C22) by the organism. Pathogens that are primarily an ingestion risk can be either bacteria or virus. [Pg.124]

A factor limiting the clinical usefulness of many pharmaceuticals is their too rapid metabolic degradation. In the best case this leads to low effectiveness and puts a heavy load on the liver and kidneys. In other cases the drug seems to fulfill is purpose effectively but it cannot be used clinically because of the formation of toxic or mutagenic metabolites [7]. [Pg.247]

Features General purpose effective over wide temp, range (180-360 F) Properties Bk. dens. 8.9-9.2 Ib/gal vise. 450-900 cps flash pt. (PMCC) 83 F 23-26.5% solids in toluene, xylene Chemlok 236A [Lord]... [Pg.185]

The processes of growth and nucleation interact in a crystallizer, and both contribute to the crystal size distribution (CSD) of the product (see section 9.1). Kinetic data needed for crystallizer design purposes (effective growth and nucleation rates) can be conveniently measured on the laboratory scale in a mixed-suspension, mixed-product removal (MSMPR) crystallizer operated continuously in the steady state Figure 9.3). The assumptions made are that no crystals are present in the feed stream, that all crystals are of the same shape, that crystals do not break down by attrition, and that crystal growth rate is independent of crystal size. [Pg.249]

Short does not speU out the means by which the purposes effect the selection oti which finious determination depends, but examples can be seen in several types of scientific investigation. In biological systems upper-level coherences (say, the lekking mating-rituals of tropical bower-birds) establish constraints that... [Pg.81]

PWR Depression b. Concrete enclosure bulkheads c. RPV b. 25% degraded c. Little corroded sound b. 45% degraded c. 5% corroded - sound recovery purposes. Effectiveness of concrete corrosion barrier likely to be severely degraded. RPV remains intact. [Pg.75]

The umidiiication system devised specifically for this purpose effectively met the requirements of the assays. By keeping constant low temperatures in the vessels, the concentration of water in natural gas was adjusted accordingly, which is... [Pg.422]

Features General purpose effective even after long-tenn aging Foam Blast 307 [Emerald Foam Control]... [Pg.469]

Features General-purpose effective at high temps, and in high electrolyte systems... [Pg.1438]

The 50 50 blends between the engineered calcium carbonate and talc A and talc B were prepared by physical blending. Blends with different loading levels were used to reinforce PP. The loading levels were 10%, 20% and 30% by weight. For comparison purpose, effects of individual mineral on the performance of PP were also evaluated. [Pg.152]


See other pages where Purposeful effects is mentioned: [Pg.204]    [Pg.180]    [Pg.222]    [Pg.231]    [Pg.135]    [Pg.180]    [Pg.258]    [Pg.254]    [Pg.561]    [Pg.117]    [Pg.120]    [Pg.352]    [Pg.356]    [Pg.548]    [Pg.502]    [Pg.351]    [Pg.355]    [Pg.43]    [Pg.45]    [Pg.575]    [Pg.588]    [Pg.59]    [Pg.212]    [Pg.285]    [Pg.1101]   
See also in sourсe #XX -- [ Pg.557 ]




SEARCH



Thermal effect models purpose

© 2024 chempedia.info