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porphyrin

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Porphyrin - an overview | ScienceDirect Topics
Porphyrins are a class of macrocycles comprised of four pyrrole units conjugated through methine bridges , with this highly conjugated structure giving intense absorption in both the UV and visible regions of the electromagnetic spectrum. www.sciencedirect.com
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Porphyrin - Wikipedia
Porphyrins are heterocyclic, macrocyclic, organic compounds, composed of four modified pyrrole subunits interconnected at their α carbon atoms via methine ... en.wikipedia.org
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Porphyrin - PubChem
Porphyrin is a group of organic heterocyclic compounds that are comprised of four modified pyrrole subunits connected via methine bridges and form an aromatic ... pubchem.ncbi.nlm.nih.gov
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porphyrin
porphyrin Chem. (ˈpɔːfɪrɪn) [a. G. porphyrin (Willstätter & Fritzsche 1909, in Ann. d. Chem. CCCLXXI. 33), f. haemato-porphyrin hæmatoporphyrin (s.v. hæmato-), f. Gr. πόρϕυρ-ος purple + -in -in1.] Any of a large class of deeply-coloured red or purple fluorescent crystalline pigments that are substit... Oxford English Dictionary
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Porphyria - Symptoms and causes - Mayo Clinic
Porphyria (por-FEAR-e-uh) refers to a group of rare disorders that result from a buildup of natural chemicals called porphyrins in the body. www.mayoclinic.org
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Porphyrins Archives | Frontier Specialty Chemicals
We've been making porphyrins for over 50 years! Known for our quality and customer service, Frontier provides custom and catalog porphyrins to many sectors ... frontierspecialtychemicals.com
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Porphyrins: One Ring in the Colors of Life | American Scientist
The porphyrin pathway is ubiquitous in the biological realm, serving throughout the plant and animal kingdoms as the assembly line for the most abundant ... www.americanscientist.org
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Porphyrin - an overview | ScienceDirect Topics
Porphyrins are organic light-absorbing molecules with unique photochemical and photophysical properties that have led to their widespread use in photomedicine. www.sciencedirect.com
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Porphyrin and heme metabolism and the porphyrias - PubMed
Porphyrins and heme are synthesized by a multistep pathway that involves eight enzymes. The first and rate-controlling step is the formation of delta- ... pubmed.ncbi.nlm.nih.gov
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PORPHYRIN Definition & Meaning - Merriam-Webster
The meaning of PORPHYRIN is any of various compounds with a macrocyclic structure that consists essentially of four pyrrole rings joined by ... www.merriam-webster.com
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Porphyrin Tests: MedlinePlus Medical Test
What are porphyrin tests? Porphyrin tests measure the level of porphyrins in your blood, urine (pee), or stool (poop). medlineplus.gov
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Phosphorus porphyrin
The chlorines on a P-centered porphyrin are first substituted by an external hydroxyphenyl group on another porphyrin. porphyrin coordinated to phosphorus. wikipedia.org
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protoporphyrin
protoˈporphyrin Chem. [a. G. protoporphyrin (Fischer & Lindner 1925, in Zeitschr. f. physiol. Chem. CXLII. 147): see proto- and porphyrin.] Any of a group of fifteen isomeric porphyrins, C34H34N4O4, in which the porphin nucleus has four methyl, two vinyl, and two propionic acid substituents; one iso... Oxford English Dictionary
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Porphobilinogen
Biosynthesis In the first step of the porphyrin biosynthesis pathway, porphobilinogen is generated from aminolevulinate (ALA) by the enzyme ALA dehydratase Metabolism In the typical porphyrin biosynthesis pathway, four molecules of porphobilinogen are concatenated by carbons 2 and 5 of the pyrrole ring (adjacent wikipedia.org
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Handbook of Porphyrin Science
Published by World Scientific, the Handbook of Porphyrin Science: With Applications to Chemistry, Physics, Materials Science, Engineering, Biology and wikipedia.org
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