What Happens When I Die? by David Edwards

What Happens When I Die? by David Edwards

Since the middle of the Sixties, new types of formulation for biologically active com- pounds have been developed, which have been introduced into the literature under the term Controlled Release Formulations (CRF). Stimulated by results from former and successful pharmaceutical research, which was engaged in the production of prepa- rations with protracted effects (introduction onto the market in the year 1952 of D- amphetamine in the form of pellets, coated to varying degrees with fats and waxes) 1), experiments were carried out to transfer the prolongation of effectiveness to pesticidal substances also, by means of a depot formulation. Initial work was concerned with the production of protective coatings for sonar systems in marine ecosystems. By means of antifouling paints or rubber coatings containing tri-n-butyl-tin oxide (TBTO), the growth of marine organisms on sonar domes, buoys and hulls in the water could be effectively prevented 2. 3). Controlled release formUlations of pesticides are defined as depot systems which continuously release their toxic constituents into the environment over a specified period of time (usually months to years) 4). According to this definition, such formu- lations can be successfully employed where a chronic exposure to biologically active compounds is required over a longer period. The following hypothetical example is intended to illustrate this 5). In Fig. 1, the duration of activity of a non-persistent pesticide with a loss rate under environmental conditions of t1/2 = 15 days, is graphically illustrated.

SKU	Unavailable
ISBN 13	9780781441414
ISBN 10	0781441412
Title	What Happens When I Die?
Author	David Edwards
Series	Questions For Life Ser
Condition	Unavailable
Binding Type	Paperback
Publisher	David C Cook
Year published	2004-10-01
Number of pages	139
Cover note	Book picture is for illustrative purposes only, actual binding, cover or edition may vary.