Carotenoid Pigments of the Dematiaceous Fungus Wangiella dermatitidis

Mycologia ◽  
1984 ◽  
Vol 76 (2) ◽  
pp. 268 ◽  
Author(s):  
Philip A. Geis ◽  
Paul J. Szaniszlo
Keyword(s):  
Carotenoid Pigments ◽  
Wangiella Dermatitidis ◽  
Dematiaceous Fungus

Pentaketide metabolites of melanin synthesis in the dematiaceous fungus Wangiella dermatitidis

1984 ◽  
Vol 137 (4) ◽  
pp. 324-328 ◽  
Author(s):  
Philip A. Geis ◽  
Michael H. Wheeler ◽  
Paul J. Szaniszlo
Keyword(s):  
Melanin Synthesis ◽  
Wangiella Dermatitidis ◽  
Dematiaceous Fungus

scholarly journals Exophiala (Wangiella) dermatitidis Prosthetic Aortic Valve Endocarditis and Prosthetic Graft Infection in an Immune Competent Patient

2017 ◽  
Vol 2017 ◽  
pp. 1-4
Author(s):  
Jay S. Berger ◽  
Lucas R. Cusumano ◽  
Joseph J. Derose ◽  
Uzma N. Sarwar
Keyword(s):  
Aortic Valve ◽  
Graft Infection ◽  
Prosthetic Graft ◽  
Aortic Graft ◽  
Wangiella Dermatitidis ◽  
Competent Patient ◽  
Prosthetic Graft Infection ◽  
Prosthetic Aortic Valve ◽  
First Case ◽  
Dematiaceous Fungus

Exophiala (Wangiella) dermatitidis is an emerging dematiaceous fungus associated with high mortality rates and is a rare cause of endocarditis. We describe the first case of E. dermatitidis endocarditis of a prosthetic aortic valve and aortic graft in an immune competent patient with no clear risk factors of hematological acquisition.

scholarly journals Carotenoid pigments fromOrobanche owerinii

1985 ◽  
Vol 21 (5) ◽  
pp. 672-672 ◽  
Author(s):  
S. F. Dzhumyrko ◽  
N. V. Sergeeva
Keyword(s):  
Carotenoid Pigments

scholarly journals Bactericidal activity of a superoxide anion-generating system. A model for the polymorphonuclear leukocyte.

1979 ◽  
Vol 149 (1) ◽  
pp. 27-39 ◽  
Author(s):  
H Rosen ◽  
S J Klebanoff
Keyword(s):  
Uric Acid ◽  
Xanthine Oxidase ◽  
Bactericidal Activity ◽  
Parent Strain ◽  
Carotenoid Pigments ◽  
Bacterial Killing ◽  
Oxidase System ◽  
System A ◽  
Presence And Absence ◽  
Generating System

The acetaldehyde-xanthine oxidase system in the presence and absence of myeloperoxidase (MPO) and chloride has been employed as a model of the oxygen-dependent antimicrobial systems of the PMN. The unsupplemented xanthine oxidase system was bactericidal at relatively high acetaldehyde concentrations. The bactericidal activity was inhibited by superoxide dismutase (SOD), catalase, the hydroxyl radical (OH.) scavengers, mannitol and benzoate, the singlet oxygen (1O2) quenchers, azide, histidine, and 1,4-diazabicyclo[2,2,2]octane (DABCO) and by the purines, xanthine, hypoxanthine, and uric acid. The latter effect may account for the relatively weak bactericidal activity of the xanthine oxidase system when purines are employed as substrate. A white, carotenoid-negative mutant strain of Sarcina lutea was more susceptible to the acetaldehyde-xanthine oxidase system than was the yellow, carotenoid-positive parent strain. Carotenoid pigments are potent 1O2 quenchers. The xanthine oxidase system catalyzes the conversion of 2,5-diphenylfuran to cis-dibenzoylethylene, a reaction which can occur by a 1O2 mechanism. This conversion is inhibited by SOD, catalase, azide, histidine, DABCO, xanthine, hypoxanthine, and uric acid but is only slightly inhibited by mannitol and benzoate. The addition of MPO and chloride to the acetaldehyde-xanthine oxidase system greatly increases bactericidal activity; the minimal effective acetaldehyde concentration is decreased 100-fold and the rate and extent of bacterial killing is increased. The bactericidal activity of the MPO-supplemented system is inhibited by catalase, benzoate, azide, DABCO, and histidine but not by SOD or mannitol. Thus, the acetaldehyde-xanthine oxidase system which like phagocytosing PMNs generates superoxide (O.2-) and hydrogen peroxide, is bactericidal both in the presence and absence of MPO and chloride. The MPO-supplemented system is considerably more potent; however, when MPO is absent, bactericidal activity is observed which may be mediated by the interaction of H2O2 and O.2- to form OH. and 1O2.

Chlorophyll and carotenoid pigments in Ribes fruits

1982 ◽  
Vol 18 (2) ◽  
pp. 131-136 ◽  
Author(s):  
Jeana Gross
Keyword(s):  
Carotenoid Pigments

A CHROMATOGRAPHIC INVESTIGATION OF THE CAROTENOID PIGMENTS OF THE AVOCADO

1944 ◽  
Vol 9 (6) ◽  
pp. 427-433 ◽  
Author(s):  
S. LASSEN ◽  
K. BACON ◽  
J. SUTHERLAND
Keyword(s):  
Carotenoid Pigments ◽  
Chromatographic Investigation
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