In 1930 Amako reported that as cultures of Serratia marcescens grew old their color changed from red to dark violet. He postulated that the change was associated with the pathway of pigment formation in the microorganism. Weiss (1949) observed a similar color change. Colonies growing on agar were orange-red in color at the end of 24 to 48 hr, but as they grew older the color changed to red-purp...

Blue-M1 is a blue pigment formed from xylose and glycine in the Maillard reaction. Previous work revealed that Blue-M1 scavenged hydroxyl radicals, and prevented the autoxidation of linoleic acid in vitro. We investigated the protective effect of Blue-M1 for 2,2'-azobis(2-amidino-propane)dihydrochloride (AAPH)-induced toxicity in COS-1 cells. COS-1 cells were cultured in AAPH containing DMEM me...

In a search for new antibiotic substances a soil actinomycete was isolated by us from a sample of south Russian soil that produces a powerful antibiotic substance of a new type. In this article a description of this organism is given, together with some details concerning the production of the antibiotic substance and its action upon pathogenic bacteria. A subsequent paper by M. G. Brazhnikova ...

The retinal pigment epithelium located between the neurosensory retina and the choroidal vasculature is critical for the function and maintenance of both the photoreceptors and underlying capillary endothelium. While the trophic role of retinal pigment epithelium on choroidal endothelial cells is well recognized, the existence of a reciprocal regulatory function of endothelial cells on retinal ...

The Great Plains of the United States was the setting for some of the earliest research in North America into patterns and changes in the character of late Pleistocene environments and their effects on contemporary human populations. Many localities in the region have well-stratified records of terminal Pleistocene and early Holocene human (Paleoindian) activity and past environments. These hav...

Spectral light changes evoke different morphogenetic and photosynthetic responses that can vary among different algae species. The aim of this study is to investigate the photosynthetic characteristics of the red macroalgae grown under different spectrum environments. In this study, Pyropia haitanensis were cultured under blue, red, and green LED and fluorescent tubes light. The growth rate, ph...

rhizosphere soil samples were collected from olive orchards of golestan, guilan, zanjan and qom provinces. fluorescent pseudomonad strains were isolated from the collected samples on king’s b medium and their phenotypic features characterized as based on the standard bacteriological methods. for all the tested strains oxidase reaction, fluorescent pigment, growth at 4?c and arginine dihydrolase...

A study was conducted to evaluate the ability of the young (0 to 3 wk) broiler chicken to utilize the P provided by a high available P corn [HAPC; 0.27% total P and 0.17% nonphytate P] in comparison with yellow dent corn (YDC; 0.23% total P and 0.03% nonphytate P), and to determine the extent to which supplementation with exogenous phytase enzyme could reduce the demands for dietary P and subse...

Technical and analytical investigations were carried out on an overhead mask of woman cartonnage from the Egyptian Museum in Cairo (catalogue 33279), which dated back to Greco-Roman Period. Various non-invasive techniques used this study such as: AutoCAD program, multispectral imaging with Ultraviolet Infrared Rays, optical microscope, X-ray fluorescence spectrometry (XRF), Fourier transform in...

When the eye is covered with a filter that transmits light below 480 nm and a blue field is observed on a computer screen that is modulated in brightness at about 1 Hz, the fovea is perceived as small irregular dark spot. It was proposed that the "foveal blue scotoma" results from the lack of S-cones in the foveal center. The foveal blue scotoma is highly variable among subjects. Possible facto...