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Viola sororia ( / vaɪˈoʊlə səˈrɔːriə / vy-OH-lə sə-ROR-ee-ə ), [ 5] known commonly as the common blue violet, is a short-stemmed herbaceous perennial plant native to eastern North America. It is known by a number of common names, including common meadow violet, purple violet, woolly blue violet, hooded violet, and wood violet.
H&E is the combination of two histological stains: hematoxylin and eosin. The hematoxylin stains cell nuclei a purplish blue, and eosin stains the extracellular matrix and cytoplasm pink, with other structures taking on different shades, hues, and combinations of these colors. [ 5][ 6] Hence a pathologist can easily differentiate between the ...
Purple cauliflower contains anthocyanins. Anthocyanins (from Ancient Greek ἄνθος (ánthos) 'flower' and κυάνεος / κυανοῦς (kuáneos/kuanoûs) 'dark blue'), also called anthocyans, are water-soluble vacuolar pigments that, depending on their pH, may appear red, purple, blue, or black. In 1835, the German pharmacist Ludwig ...
Melanoma is the most dangerous type of skin cancer; it develops from the melanin -producing cells known as melanocytes. [ 1 ] It typically occurs in the skin, but may rarely occur in the mouth, intestines, or eye ( uveal melanoma ). [ 1 ][ 2 ] In women, melanomas most commonly occur on the legs; while in men, on the back. [ 2 ]
A blue nevus is a type of coloured mole, typically a single well-defined blue-black bump. [ 1][ 2] The blue colour is caused by the pigment being deep in the skin. [ 4] Diagnosis is by visualisation and dermoscopy. [ 4] A biopsy is sometimes performed, or the whole lesion surgically removed. [ 3]
PUVA ( psoralen and UVA) is an ultraviolet light therapy treatment for skin diseases: vitiligo, eczema, psoriasis, graft-versus-host disease, mycosis fungoides, large plaque parapsoriasis, and cutaneous T-cell lymphoma, using the sensitizing effects of the drug psoralen. [ 1]: 686 [ 2][ 3] The psoralen is applied or taken orally to sensitize ...
Wood's glass is a deep violet-blue barium-sodium silicate glass with about 9% nickel oxide developed during World War I to block visible light for covert communications. It allows both infrared daylight and ultraviolet night-time communications by being transparent between 320 nm and 400 nm and also the longer infrared and just-barely-visible ...
A melanocytic nevus (also known as nevocytic nevus, nevus-cell nevus and commonly as a mole) [ 1][ 2] is usually a noncancerous condition of pigment-producing skin cells. It is a type of melanocytic tumor that contains nevus cells. [ 2] A mole can be either subdermal (under the skin) or a pigmented growth on the skin, formed mostly of a type of ...