Degradation Degrade

Polymethyl- methacrylate Dioxane i ethylacetate triethylborate benzene J Degradation Degradation Degradation Degradation... 

HOFMANN Amide Degradation Degradation o( amides to amines by means of hypohaiides... 

WOHL - WEYGAND Aldose degradation Degradation of sugar oximes via cyanohydrins by means of an acid chloride/pyridine (Wohl) or of... 

Typically, the EPA requires monitoring for specific pesticides and degradates. Degradates which need to be identified are major degradates [residues present at levels >10 pg kg (ppb) or 10% of applied], are mobile in the environment or have... 

Thermal Oxidative Degradation - Degradation products from Hydroperoxide [19]... 

ENZYMIC NON-ENZYMIC DEGRADATION DEGRADATION PRODUCT PRODUCT... 

Extent of degradation Degradation levels of interest will vary depending on the compound and purpose of the study. Time/ temperature combinations that produce levels of degradation products or loss of potency that would cause failure to meet specifications would be reasonable to use for comparative stress studies. 

High selectivity, good DCs values Reversible can be cycled many times Commercial availability of components Robust to degradation Degradation products wash out Low solubility loss to the aqueous phase Resists effects of impurities... 

Laboratory Studies on Insecticide Degradation. Degradation in natural waters Stream water (pH 6.0) and sediment (organic content 36%) were taken from a small shallow stream (depth ca 20 cm, width oa 1.5 m) in the Goulais River watershed, a mixed conifer-deciduous forest area, ca 50 km northeast of Sault Ste. Marie, Ont., Canada. Two degradation studies in duplicate (one for aminocarb and another for fenitrothion) were set up according to Sundaram and Szeto ( 1 ). Aminocarb and fenitrothion (100 pg/L in acetone) were added separately to 1000 mL aliquots of sterilized (Ameco Sterilizer 1 h) and unsterilized stream water in either open or closed 1500 mL Erlenmeyer flasks. The latter were sealed with polyethylene snap caps which were removed once a day for about 1 min. to allow air exchange. The flasks were incubated at 15 0.2°C in an environmental chamber. Unfortified water... 

Keywords. Polylactide, Polycaprolactone, Poly(3-hydroxybutyrate), Degradation, Degradation products... 

Anaerobic degradation Degradation in the absence of air, as occurs in dry landfills. Anaerobic... 

From the materials viewpoint, it is of Interest to examine the thermodynamics of radlolysls of polymers. Since gamma radlolysls data is readily available, polymers can be compared as in Table X. Note that materials having a large heat of polymerization tend to crosslink under radlolysls. The same polymers are thermally resistant to degradation. Degrading polymers have low ceiling temperatures ( 150°C) and low heats of polymerization. 

Fig. 8 Surface of polypropylene bar after 80 weeks of UV exposure followed by uniaxial tensile test. Bar axis is vertical. Cracks formed in degraded layer, perpendicular to stress axis. Degraded surface is very fragile and easily parted from underlying material that is less degraded. Degradation tends to be greatest nearer to the corner, possibly because oxygen can diffuse into the surface layers from two adjacent surfaces. (Courtesy of T.J. Turton. See also Refs. ". )...

Agent/synonyms Degradation Degradation product or impurity Persistence6/ Chronic toxicity values of... 

Run No. Degradation of Adipic Acid as Absolute mg Adipic Degraded Degradation, g/hr g SO2 removed Degradation Rate Constant K[Pg.226]

Run Absolute mg Adipic Degraded Degradation Rate Uncertainty1 ... 

Polyvinyl- pyrrolidone Methanol-triethylborate Degradation Degradation Intermol. crosslinking Intermol. crosslinking... 

Polystyrene Dioxane j benzene 1 Degradation Degradation Intermol. crosslinking Degradation... 

Alkaline degradation is possible but occurs much less readily than acid degradation. Degradation in alkaline conditions is of interest to the paper scientist mostly because of the degradation which may occur during analytical procedures rather than what may happen during the ageing of paper. 

---