Disposable controlled-release

WANGETAL. Disposable Controlled-Release Device for Drug Infusion... 

In controlled release drug delivery, external devices have achieved considerable success recently, and analysis indicates the need for a disposable, external infusor capable of delivering large or small volumes. 

The development of techniques for the controlled release of nuclear energy in reactors after World War II was regarded as an important advance in the direction of nonpolluting energy production. Unfortunately, new environmental problems have arisen from the operation of such reactors these include the release of radioactive materials in leak episodes or occasional catastrophic accidents, and the disposal of waste materials. 

To be used as biomaterials, polymers must possess biocompatibility, bioabsorbability and mechanical resistance [114]. Current applications include surgical implants and plain membranes in vascular or orthopaedic surgery, as well as the controlled release of drugs. PLA is the most widely used material for medical applications. Other possible outlets are offered by the hygiene sector including, nappy back sheets, cotton swabs, disposable razors and so on. 

Besides mulch films, other potential agricultural applications for biodegradable polymers include devices for the controlled release of agrochemicals (such as fertilisers, soil applied active ingredients, insect pheromones and so on), disposable articles such as plant pots, composting containers and bags, envelopes of ensilage, seed trays and so on. 

Superabsorbent polymers are one of the new materials. Since 1987, when it was used for disposable baby diapers, production has increased each year. Production in 1995 reached 600,0001 [150]. Due to commercial applications like paper diapers and sanitary products, they are so familiar to us because they appear on TV almost every day. Other applications, such as a soil additive to retain moisture, materials for maintaining freshness, antiffost construction materials, gel perfumes, and controlled release drugs are under development. It seems important to measure and evaluate the superabsorbent polymers that have been used in many... 

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