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Composition The mating plug of the Bombus terrestris was chemically analyzed and found to consist of palmitic acid, linoleic acid, oleic acid, stearic acid, and cycloprolylproline. It was found that the acids (sans cycloprolylproline) were sufficient by themselves to create the plug. Researchers hypothesize that cycloprolylproline reduces female receptivity to further breeding. Occurrence in nature […]
History The first 7075 was developed by Japanese company Sumitomo Metal in 1936. 7075 was used for the Zero fighter’s air frame of the Imperial Japanese Navy in pre-war times. Basic properties Aluminium 7075 has a specific gravity of 2.73 g/cm (0.098 lb/cubic inch). Mechanical properties The mechanical properties of 7075 depend greatly on the […]
Types Air King The “Air King” Universal Air Hose Coupling (see Dixon Valve) is malleable iron or brass “quarter turn” “sexless coupling” usually found on pneumatic tools like jackhammers. The fitting is considered “universal” because a common two lug head is used on all sizes ranging from 1/4″ through 1″. Cam and groove A Cam […]
Definition Cross section of a typical bulker. 1. Cargo hold 2. Hatch cover 3. Upper hopper tank for water ballast or oil 4. Double bottom 5. Lower hopper tank, for water ballast There are various ways to define the term bulk carrier. As of 1999, the International Convention for the Safety of Life at Sea defines a bulk carrier as […]
It is reported that in the past 15 years, the international medical plastics market, the average annual growth rate of 15% to 18% in a variety of medical device market growth rate in the top. The production of medical plastic products in China began in the last century, 70’s, the earliest medical plastic products of […]
