Results 211 to 220 of about 20,002 (267)

Precursors of Protoporphyrin in Chlorella

Nature, 1952
ON the basis of studies of Chlorella mutants a biosynthetic chain has been formulated leading from protoporphyrin through Mg protoporphyrin, Mg vinyl pheoporphyrin and protochlorophyll finally to chlorophyll1. We have recently isolated a Chlorella mutant which promises to reveal some of the precursor porphyrins leading up to protoporphyrin.
L, BOGORAD, S, GRANICK
openaire   +2 more sources

Protoporphyrin IX and oxidative stress

Free Radical Research, 1999
The short- and long-term pro-oxidant effect of protoporphyrin IX (PROTO) administration to mice was studied in liver. A peak of liver porphyrin accumulation was found 2 h after the injection of PROTO (3.5 mg/kg, i.p.); then the amount of porphyrins diminished due to biliar excretion.
S, Afonso, G, Vanore, A, Batlle
openaire   +2 more sources

Triplet states of protoporphyrin IX and protoporphyrin IX dimethyl ester

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1980
Laser and conventional flash photolysis have been used to obtain the triplet—triplet absorption spectra, triplet lifetimes, rates of oxygen quenching and quantum efficiencies of triplet formation of protoporphyrin IX as the dication, monocation and free base in several solvent systems. The results are rationalised in terms of protoporphyrin IX existing
Roy S. Sinclair, David Tait, T. George Truscott   +2 more
openaire   +1 more source

Synthesis of protoporphyrin XIII and protoporphyrin III

The Journal of Organic Chemistry, 1977
G, Buldain, L, Diaz, B, Frydman
openaire   +2 more sources

New curing agents for epoxy resins: protoporphyrins

, 2018
F. Fraga-López, E. C. Barreiro, A. Jover, F. Meijide, Eugenio Rodríguez, José Vázquez-Tato   +5 more
semanticscholar   +1 more source

Redox transitions of chromium, manganese, iron, cobalt and nickel protoporphyrins in aqueous solution.

Physical Chemistry, Chemical Physics - PCCP, 2008
M. T. de Groot, M. Koper
semanticscholar   +1 more source

Structure and growth mechanism of self-assembled monolayers of metal protoporphyrins and octacarboxylphthalocyanine on silicon dioxide

, 2014
V. Gadenne, L. Porte, L. Patrone
semanticscholar   +1 more source

Oxygen reduction and evolution at single-metal active sites: Comparison between functionalized graphitic materials and protoporphyrins

, 2013
F. Calle‐Vallejo, J. Martínez, J. M. García‐Lastra, E. Abad, M. Koper   +4 more
semanticscholar   +1 more source

Increased erythrocyte protoporphyrins and blood lead--a pilot study of childhood growth patterns.

Journal of Toxicology and Environmental Health, Part A, 1989
C. Angle, D. Kuntzelman
semanticscholar   +1 more source

Differential regulation of heme oxygenase isozymes by Sn- and Zn-protoporphyrins: possible relevance to suppression of hyperbilirubinemia.

Biochimica et Biophysica Acta, 1992
M. Maines, G. Trakshel
semanticscholar   +1 more source