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Biomedical subjects

J A JENSEN

Publications and source records attributed to J A JENSEN.

13 recordsLinked to original sources
PubMed1965

DICHLORVOS VAPOUR DISINSECTION OF AIRCRAFT.

The authors describe the testing of an automatic aircraft disinsection system permanently installed on a commercial DC-6B passenger aircraft. An air-compressor forces ambient cabin air, partially saturated with dichlorvos vapour at a set concentration, through the cabin, cockpit and baggage compartments of the aircraft for 30 minutes. Insecticide concentrations and insect mortality were observed in post-overhaul check flights, and insect mortality and passenger reactions were observed on scheduled flights between Miami, Florida, and Nassau, Bahamas.The results showed satisfactory biological efficiency. The passengers were unaware of the disinsection process and showed no signs of discomfort.

Aircraft↗
PubMed1961

Disinsection of aircraft with a mechanical dispenser of DDVP vapour.

In-flight and on-ground tests in commercial aircraft have demonstrated the feasibility of using DDVP (O,O-dimethyl-2,2-dichlorovinyl phosphate) vapour for disinsection purposes. Treatment of the passenger compartments of DC-6 and DC-7 aeroplanes was accomplished by passing cabin air through a fibrous cartridge impregnated with DDVP. The DDVP-charged air stream was distributed from the cartridge into the passenger compartment through small orifices, spaced 3 feet apart, in metal tubing suspended at ceiling height along the longitudinal axis of the cabin. Further distribution of the vapour was effected by the air currents of the ventilating system. During in-flight tests, vapour concentrations of 0.20 and 0.24 mug of DDVP per litre of air gave 100% mortalities of caged houseflies located at 12 sites at three different levels and exposed for 30 minutes. No effect of the vapour was noticed on the cholinesterase levels of three individuals exposed to the treatment during 24 tests.

Aerosols↗
PubMed1961

A mechanical system for dispensing known amounts of insecticidal vapours.

The requirements for a self-contained semi-automatic insecticidal vapour dispenser for use in the disinsection of aircraft are presented. A prototype device meeting these requirements is described and data on its performance, using DDVP (O,O-dimethyl-2,2-dichlorovinyl phosphate) as the insecticide, are given. In this system a miniature air compressor forces air through a membrane impregnated with DDVP, and the vapour-laden air exits into the cabin through a tubular distribution system equipped with orifices. The vapour output is governed by the volume and the temperature of the air passing through the membrane, and the system is adaptable to all types of aircraft at present in use or projected for the near future. The system can also be adapted for use in the disinsection of other closed or semi-closed spaces.

Aerosols↗