the present study is designed to evaluate the application of a simple method for rapid identification of malassezia furfur among other malassezia spp. based on production of a brownish-red pigment and its diffusion into the medium containing l-tryptophan as a sigle source of nitrogen.  91 strains of malassezia (20% m. furfur , 2% m. sympodialis , 5% m. obtosa and 73% m. globosa ) isolated from ...

The chemical-mineralogical characterization of rupestrian paintings in red, white, black and yellow colors, which decorate the rocky walls from archaeological sites Ema Furna dos Índios (Inhuma, Piauí, Brazil) was performed. chemical analyses were performed situ by non-invasive analytical technique X-ray fluorescence spectrometry (XRF) as well laboratory using a non-destructive approach, withou...

Geographical variation in the mimetic wing patterns of the butterfly Heliconius erato is a textbook example of adaptive polymorphism; however, little is known about how this variation is controlled developmentally. Using microarrays and qPCR, we identified and compared expression of candidate genes potentially involved with a red/yellow forewing band polymorphism in H. erato. We found that tran...

Pigment Red3 was synthesized and chemically treated by sulphonation. The treatment, affected the surface chemistry and the shape of pigments. The effects of reaction time, temperature, Solvent/Pigment ratio and Acid/Pigment ratio were examined on the treated pigment. The investigation of experimental design based on Tauguchi method, was carried out. To assessment of treated particles, UV-visibl...

Primate color vision is based on two to three cone types in the retina, each expressing a different class of visual pigment, making them the only mammals that possess trichromacy. These pigment classes are the short wavelength-sensitive (SWS1) pigment and the long wavelength-sensitive (LWS) pigment, orthologues of the same pigments found in many other vertebrates, as well as the middle waveleng...

Sir: As part of a broad program on the genetics of Streptomyces coelicolor A3(2)1), RUDD and HOPWOOD2) carried out genetic studies on a nondiffusible red mycelial pigment produced by this organism. By UV irradiation of strain B18, a mutant blocked in the synthesis of the diffusible pigment actinorhodin3), they obtained a series of redmutants. These all mapped in a narrow region of the chromosom...

Candida boidinii, Growth on Ethanol, Presence M onofluoracetate, Red Dipyrromethene Pigment, Structure Elucidation The yeast Candida boidinii ATCC 32195 produces a cell-bound red pigment during growth on 1% ethanol in the presence o f 0.05% monofluoracetate. Its isolation and purification are described. The structure was elucidated by chemical degradation and physical methods, mainly mass and n...

Iron is eliminated in the bile of normal dogs at a low but quite constant rate, 0.2 mg. per day. The feeding of large amounts of iron to normal dogs does not cause an increased iron excretion in the bile nor does the injection of considerable quantities of colloidal iron by vein. When red cell destruction is brought about by acetyl-phenylhydrazine the elimination of biliary iron may increase te...

We report the case of a 33-year-old male who presented with a malignant melanoma on his anterior chest wall. The lesion was only found in the red ink pigment of the tattoo, as were several in-transit dermal metastases. Possible explanations include a pre-existing lesion which was seeded with red ink or the possibility of the red ink causing an inflammatory reaction leading to malignant transfor...