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The Draize test is an acute toxicity test devised in 1944 by Food and Drug Administration (FDA) toxicologists John H. Draize and Jacob M. Spines. Initially used for testing cosmetics, the procedure involves applying 0.5 mL or 0.5 g of a test substance to the eye or skin of a restrained, conscious animal, and then leaving it for a set amount of time before rinsing it out and recording its effects.
In photography, toning is a method of altering the color of black-and-white photographs. In analog photography, it is a chemical process carried out on metal salt-based prints, such as silver prints, iron-based prints (cyanotype or Van Dyke brown), or platinum or palladium prints. This darkroom process cannot be performed with a color photograph.
A subject of the Tuskegee syphilis experiment has his blood drawn, c. 1953.. Numerous experiments which were performed on human test subjects in the United States in the past are now considered to have been unethical, because they were performed without the knowledge or informed consent of the test subjects. [1]
Photographic printing is the process of producing a final image on paper for viewing, using chemically sensitized paper.The paper is exposed to a photographic negative, a positive transparency (or slide), or a digital image file projected using an enlarger or digital exposure unit such as a LightJet or Minilab printer.
A cluster of millimeter-sized, black-and-white spheres, which were eggs, ejected from frogs Ejection of the spermatozoa of male toads Animal used: Mice Rabbit African clawed frog – Xenopus laevis: Mature (male) toads – Rhinella arenarum: Duration of test: A few days after injection of urine Approximately 48 hours after injection
Chromogenic prints, like most color photographic prints, are developed using the RA-4 process. As of 2017, the major lines of professional chromogenic print paper are Kodak Endura and Fujifilm Crystal Archive. [21] Plastic chromogenic "papers" such as Kodak Duratrans and Duraclear are used for producing backlit advertising and art. [citation ...
The stamp was designed to celebrate the art of magic and "by rotating each stamp, you can see a white rabbit popping out of a black top hat." [ 54 ] In August 2019 the United States Postal Service introduced a second stamp with lenticular technology, this time featuring the dinosaur Tyrannosaurus Rex.
Over 20,000 rabbits were used for animal testing in the UK in 2004. [119] Albino rabbits are used in eye irritancy tests (Draize test) because rabbits have less tear flow than other animals, and the lack of eye pigment in albinos make the effects easier to visualize. The numbers of rabbits used for this purpose has fallen substantially over the ...
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