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The 1950s also saw the rise and recognition of cross-contamination from used needles. This led to the development of the first fully disposable plastic syringe by New Zealand pharmacist Colin Murdoch in 1956. [15] This period also marked a shift in interest from needle specifications to general sterility and safety. [14]
A plastic bag, poly bag, or pouch is a type of container made of thin, flexible, plastic film, nonwoven fabric, or plastic textile. Plastic bags are used for containing and transporting goods such as foods, produce, powders , ice, magazines , chemicals , and waste .
Holes can be possibly made on slides but can result in generation of weld lines. Minimum spacing between 2 holes or a hole and a sidewall should be equal to the diameter of the hole. The hole should be located at a minimum distance of 3 times the diameter from the edge of a part, to minimize stresses.
Due to their durability, plastic bags can take centuries to decompose. [22] According to The Outline, it can take between 500 - 1,000 years for a plastic shopping bag to break down. The use lifespan of a bag is approximately 12 minutes of use. [23] On land, plastic bags are one of the most prevalent types of litter in inhabited areas.
The Merck Veterinary Manual was first published in 1955. [1] It was based on the Merck Manual of Diagnosis and Therapy , which was first published in 1899 as a reference for physicians. [ 1 ] The first edition of the Veterinary Manual included contributions from over 200 authors, with 389 chapters divided into sections on public health ...
A Ziploc-branded storage bag Close-up from a cross section of the sealing mechanism. A zipper storage bag, slider storage bag, zipper bag, ziplock bag, zip-lock bag, ziploc bag, or zippie is an inexpensive flexible rectangular storage bag, usually transparent, made of polyethylene [1] [2] or similar plastic, that can be sealed and opened many times, either by a slider, which works in a similar ...
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The relative size of an indwelling urinary catheter is described using French units (Fr). [6] Alternatively, the size of a 10 Fr catheter might be expressed as 10 Ch (Charriere units – named after a 19th century French scientific instrument maker, Joseph-Frédéric-Benoît Charrière). The most common sizes are 10 Fr to 28 Fr. 1 Fr is ...