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Nouns can be distinguished from verbs syntactically in that the copula là "to be" may precede nouns in predications, whereas the copula fails to occur before verbs or adjectives. Mai là sinh viên. "Mai is (a) student." For the meaning of the sentence to be understandable, in the sentence above the copula là precedes sinh viên "student".
Solvent Violet 13, also known as D&C Violet No.2, oil violet, Solvent Blue 90, Alizarine Violet 3B, Alizurol Purple, Duranol Brilliant Violet TG, Ahcoquinone Blue IR base, Quinizarin Blue, Disperse Blue 72, and C.I. 60725, is a synthetic anthraquinone dye with bright bluish violet hue.
Methyl violet 2B (IUPAC name: 4,4′-((4-Iminocyclohexa-2,5-dien-1-ylidene)methylene)bis(N,N-dimethylaniline) monohydrochloride) is a green powder which is soluble in water and ethanol but not in xylene. It appears yellow in solution of low pH (approximately 0.15) and changes to violet with pH increasing toward 3.2. [3]
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Varieties of the color violet Violet Spectral coordinates Wavelength 380–450 nm Frequency 800–715 THz Color coordinates Hex triplet #8000FF sRGB B (r, g, b) (128, 0, 255) HSV (h, s, v) (270°, 100%, 100%) CIELCh uv (L, C, h) (41, 134, 275°) Source W3C B: Normalized to [0–255 ...
Mạo Khê is a ward (phường) of Đông Triều city in Quảng Ninh Province, Vietnam. [ 1 ] It is the location of the 1951 Battle of Mạo Khê in the First Indochina War , with the defeat of the communist Việt Minh against France and the State of Vietnam .