Lexic.us

Definition of Porphyrin

1. Noun. Any of various pigments distributed widely in living tissues.

Definition of Porphyrin

1. Noun. (organic chemistry) Any of a class of heterocyclic compounds containing four pyrrole rings arranged in a square; they are important in biochemistry in a form with a metal atom in the central cavity (hemoglobin with iron, chlorophyll with magnesium, etc.). ¹

¹ Source: wiktionary.com

Definition of Porphyrin

1. [n -S]

Lexicographical Neighbors of Porphyrin

Literary usage of Porphyrin

Below you will find example usage of this term as found in modern and/or classical literature:

1. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1892)
"... -porphyrin contains two bands and an intermediate shading, which the writer is unable to distinguish from those of acid haemato-porphyrin in dilute ..."

2. International Medical and Surgical Surveyby American Institute of Medicine by American Institute of Medicine (1922)
"This was carried out and the substance examined spectroscopically and spectrographically. In a very thin layer it yielded the porphyrin spectrum as well as ..."

3. Science by American Association for the Advancement of Science (1883)
"They are, therefore, likely candidates for either ring methyls, or else groups not directly attached to the porphyrin ring but located near its edge, ..."

4. Petralogy. A Treatise on Rocks by John Pinkerton (1811)
"porphyrin. This name has been adopted for porphy- ritic substances, in which the crystals of felspar are so small as almost to escape the eye, ..."

5. Untersuchungen über Chlorophyll: Pioneer History of the Territorial and by State Library of Iowa, Johnson Brigham, Richard Willstätter, Arthur Stoll, Berlin Kaiser Wilhelm-institut für chemie (1913)
"Sie gab mit Säure unter reichlicher Bildung amorpher Flocken ein in Äther gelbbraunes porphyrin. Das Nebenprodukt, selbst unbeständig, ..."

6. Genomic Signal Processing and Statistics by Edward R Dougherty (2005)
"Carbon nanotubes in tumor-suppression therapy Photodynamic therapy (PDT) uses laser light in the spectrum of 630 nm to activate porphyrin compounds ..."

7. Photo-chemistry by Samuel Edward Sheppard (1914)
"... porphyrin and the leaf-green pigment phyllo-porphyrin, is vouched for to some extent ... By reduction of the former, a meso-porphyrin, ..."

8. Practical organic and bio-chemistry by Robert Henry Aders Plimmer (1920)
"The haemato- porphyrin and ferric oxide, precipitated by adding sodium acetate, are filtered off, washed with water and dried at the ordinary temperature ..."

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