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Due to a color change from blue to red at pH 3.0–5.2, Congo red can be used as a pH indicator.Since this color change is an approximate inverse of that of litmus, it can be used with litmus paper in a simple parlor trick: add a drop or two of Congo red to both an acid solution and a base solution.
Congo (1954–1964) was a chimpanzee artist and painter. Zoologist, author and surrealist painter Desmond Morris first observed his abilities when the chimpanzee was offered a pencil and paper at two years of age. By the age of four, Congo had made 400 drawings and paintings. His style has been described as "lyrical abstract impressionism". [1]
The brilliant opaque red of vermillion, for example, results because vermillion reflects the major part of red light, but absorbs the blue, green and yellow parts of white light. [1] Red pigments historically were often made from iron oxides, such as hematite. These pigments have been found in cave paintings in France dating to between 16,000 ...
A painting bought at a garage sale in Minnesota is a previously unknown portrait by Dutch artist Vincent Van Gogh, according to a newly published expert analysis.. It was made by Van Gogh during ...
Red Kasai and Congo rubbers are obtained from the same species of vines, namely, the Landolphia, Owariensis Pal. Beauv., L. Gentilii De Wild and L. Droogmansiana De Wild. [13] The difference in color, which is the chief distinction, is probably due to the different climatic conditions in the two districts, and different modes of collecting and ...
Swift wore a black corset-style top and black jeans with rhinestone cutouts and a gold "87" necklace, while Lively wore Adidas red track pants with a cropped white tank and a matching red jacket.
Red Lobster's "Lobsterfest" event is back just in time for February 14. The seafood chain is offering new entrées like a Lobster Roll and Lobster and Shrimp Linguini, along with other tasty options.
Siddharth Kara is an American author. He is a Pulitzer Prize finalist, a British Academy Global Professor, and an associate professor at the University of Nottingham.He is best known for his book Cobalt Red: How the Blood of the Congo Powers Our Lives (2023).