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Hence, a pH indicator is a chemical detector for hydronium ions (H 3 O +) or hydrogen ions (H +) in the Arrhenius model . Normally, the indicator causes the color of the solution to change depending on the pH. Indicators can also show change in other physical properties; for example, olfactory indicators show change in their odor.
Alice Malsenior Tallulah-Kate Walker (born February 9, 1944) [2] is an American novelist, short story writer, poet, and social activist. In 1982, she became the first African-American woman to win the Pulitzer Prize for Fiction, which she was awarded for her novel The Color Purple. [3] [4] Over the span of her career, Walker has published ...
Ionized-air glow. Nitrogen glow. Oxygen glow. Electrical discharge in air. Particle beam from a cyclotron. Ionized-air glow is the luminescent emission of characteristic blue–purple–violet light, often of a color called electric blue, by air subjected to an energy flux either directly or indirectly from solar radiation. [1]
A flicker light bulb, flicker flame light bulb or flicker glow lamp is a gas-discharge lamp which produces light by ionizing a gas, usually neon mixed with helium and a small amount of nitrogen gas, by an electric current passing through two flame shaped electrode screens coated with partially decomposed barium azide. The ionized gas moves ...
Biuret test. In chemistry, the Biuret test (IPA: / ˌbaɪjəˈrɛt /, / ˈbaɪjəˌrɛt / [1] ), also known as Piotrowski's test, is a chemical test used for detecting the presence of at least two peptide bonds in a molecule. In the presence of peptides, a copper (II) ion forms mauve -colored coordination complexes in an alkaline solution.
Scott Sanders (born 1957) is an American television producer, film producer and theatre producer.His theatrical musical version of Alice Walker's novel The Color Purple, for which he was a lead producer alongside co-producers Oprah Winfrey and Quincy Jones, premiered on Broadway in 2005, garnering 11 Tony Award Nominations including Best Musical.
Purple Kiss (Korean: 퍼플키스; stylized in all caps) is a South Korean girl group formed by RBW in 2020. The group consists of six members: Na Go-eun, Dosie, Ireh, Yuki, Chaein and Swan . [1] Originally a seven member group, Park Ji-eun left the group on November 18, 2022 due to health issues.
Tyrian purple (Ancient Greek: πορφύρα porphúra; Latin: purpura), also known as royal purple, imperial purple, or imperial dye, is a reddish-purple natural dye. The name Tyrian refers to Tyre, Lebanon , once Phoenicia .