Results 181 to 190 of about 27,628 (212)
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Triplet states of protoporphyrin IX and protoporphyrin IX dimethyl ester
Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1980Laser 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 +2 more
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Protoporphyrin IX and oxidative stress
Free Radical Research, 1999The 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
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Nitric oxide inhibits the formation of zinc protoporphyrin IX and protoporphyrin IX
Meat Science, 2010The aim of this study was to elucidate the mechanism by which curing agents, especially nitrite, inhibit the formation of zinc protoporphyrin IX (ZPP) in dry-cured hams such as Parma ham. The oxidation-reduction potential of model solutions was increased by the addition of nitrite, but it was not clear whether the formation of ZPP is inhibited by the ...
Jun-ichi, Wakamatsu +3 more
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Transfer of Protoporphyrin IX Between Cells¶
Photochemistry and Photobiology, 2002Human adenocarcinoma cells of the line WiDr and human leukemia T cells of the line Jurkat were incubated with 5-aminolevulinic acid and found to produce protoporphyrin IX (PpIX). They were able to transfer a fraction of the sensitizer to neighboring control cells. The transfer took place through direct membrane contact.
Johan, Moan, Li Wei, Ma, Trond, Stokke
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Protoporphyrin IX Photosensitization of Corneal Endothelium
Archives of Ophthalmology, 1989Protoporphyrin IX, a naturally occurring precursor of hemoglobin found in serum and erythrocytes, is a photoactive compound that we have detected in aqueous aspirates of three patients with hyphemas (0.13, 0.33, and 0.67 microgram/dL). To determine whether corneal endothelial photosensitization could occur, rabbit corneas were exposed to physiologic ...
J D, Gottsch +5 more
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Quantitative determination of Zn protoporphyrin IX, heme and protoporphyrin IX in Parma ham by HPLC
Meat Science, 2009We measured the contents of Zn protoporphyrin IX (ZPP), heme and protoporphyrin IX (PPIX) in Parma ham by simultaneous analysis using high-performance liquid chromatography (HPLC). Extraction with ethyl acetate-acetic acid (4:1) was suitable for the quantitative analysis of ZPP.
Jun-Ichi, Wakamatsu +3 more
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Enhancing protoporphyrin IX-induced PDT
SPIE Proceedings, 2009Photodynamic therapy (PDT) using porphyrin precursors is commonly used in dermatology. Evidence indicates that good clinical outcomes (associated with excellent cosmesis) can be achieved in superficial precancers and basal cell carcinoma (BCC), however, efficacy appears less favorable for thicker nodular BCC (nBCC) unless multiple PDT treatment ...
Alison Curnow +2 more
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Biosynthesis of Chlorophylls from Protoporphyrin IX
ChemInform, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
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