Results 111 to 120 of about 27,628 (212)

Simultaneous liquid-chromatographic determination of zinc protoporphyrin IX, protoporphyrin IX, and coproporphyrin in whole blood.

open access: yesClinical Chemistry, 1980
Abstract We describe a method for simultaneously measuring concentrations of coproporphyrin, zinc protoporphyrin IX, and protoporphyrin IX in whole blood by liquid chromatography, with use of reversed-phase ion-pair system, fluorometric detection, and internal standardization.
G R, Gotelli   +3 more
openaire   +2 more sources

Oxygen and Conformation Dependent Protein Oxidation and Aggregation by Porphyrins in Hepatocytes and Light-Exposed CellsSummary

open access: yesCellular and Molecular Gastroenterology and Hepatology, 2019
Background & Aims: Porphyrias are caused by porphyrin accumulation resulting from defects in the heme biosynthetic pathway that typically lead to photosensitivity and possible end-stage liver disease with an increased risk of hepatocellular carcinoma ...
Dhiman Maitra   +12 more
doaj   +1 more source

Fluorescence diagnosis of metastatic lymph nodes using 5-aminolevulinic acid (5-ALA) in a mouse model of colon cancer. [PDF]

open access: yes, 2012
[Background]Lymph node metastasis is one of the most critical prognostic factors in patients with colorectal cancer. Although regional lymph nodes should be surgically resected and pathologically examined, techniques for the intraoperative diagnosis of ...
Hasegawa, Suguru   +4 more
core   +1 more source

Effect of 5-aminolevulinic acid-based photodynamic therapy via reactive oxygen species in human cholangiocarcinoma cells

open access: yesInternational Journal of Nanomedicine, 2011
Cy Hyun Kim1,2, Chung-Wook Chung1, Kyung Ha Choi1, Jin-Ju Yoo1, Do Hyung Kim1,2, Young-IL Jeong1, Dae Hwan Kang1,21National Research and Development Center for Hepatobiliary Cancer, Research Institute for Convergence of Biomedical Science and Technology,
Kang DH   +6 more
doaj  

Absence of the cbb3 terminal oxidase reveals an active oxygen-dependent cyclase involved in bacteriochlorophyll biosynthesis in Rhodobacter sphaeroides. [PDF]

open access: yes, 2016
The characteristic green color associated with chlorophyll pigments results from the formation of an isocyclic fifth ring on the tetrapyrrole macrocyle during the biosynthesis of these important molecules.
Canniffe, D.P.   +3 more
core   +2 more sources

Electronic and optical properties of 5-AVA-functionalized BN nanoclusters: A DFT study [PDF]

open access: yes, 2016
We carried out detailed density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations upon 5-aminolevulinic acid-functionalized B12N12 and B16N16 nanoclusters with the B3LYP, B3PW91, and PBE methods using the 6-311+G∗∗
Balakheyli, H.   +4 more
core   +1 more source

Synthesis of new derivatives of protoporphyrin IX

open access: yesТонкие химические технологии, 2010
In the course of searching new highly active substances which are prospective for treating tumors and some other types of widespread diseases the synthesis of protoporphyrin IX bearing the benzodiazepine residue, was performed.
V. Yu. Pavlov   +2 more
doaj  

Physiology of purple sulfur bacteria forming macroscopic aggregates in Great Sippewissett Salt Marsh, Massachusetts [PDF]

open access: yes, 1993
Purple bacterial aggregates found in tidal pools of Great Sippewissett Salt Marsh (Falmouth, Cape Cod, MA) were investigated in order to elucidate the ecological significance of cell aggregation. Purple sulfur bacteria were the dominant microorganisms in
Angelica P. Seitz   +23 more
core   +1 more source

Mechanism of Penoxsulam’s Effect on Chlorophyll Synthesis and the Metabolism of Foxtail Millet

open access: yesPlants
Foxtail millet is a characteristic miscellaneous grain crop with many benefits in current agricultural production and is crucial in the adjustment of the planting structure and the sustainable development of dry farming.
Tingting Chen   +9 more
doaj   +1 more source

Intraoperative fluorescence diagnosis in patients with brain metastases (medical technology)

open access: yesBiomedical Photonics, 2014
The technique of intraoperative fluorescence diagnosis with alasens for brain metastases includes visual assessment of alasens-induced protoporphyrin IX fluorescence and local spectroscopy.
A. M. Zaytsev   +2 more
doaj  

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