Mutants of the yeast Saccaromyces cerevisiae which can grow on glycerol medium in the presence of 0.05% D (+) glucosamine have been isolated. Genetic analysis of 13 of these glucosamine resistant (GR) mutants demonstrated two modes of inheritance. One group of mutants (GR 5, 6, 7, 8, 9 and 10) gave results characteristic of non-Mendelian inheritance and it is suggested that these mutants repres...

the purpose of this report is to present the results of analysis of actual glucosamine and/or chondroitin contents of several such products in the market place and to determine if they significantly deviate from their label claim. a total of fourteen products containing glucosamine sulfate and nine products containing chondroitin sulfate were evaluated. the amounts of glucosamine and chondroiti...

Chitosan is a partially deacetylated linear polysaccharide composed of ?-1,4-linked units d-glucosamine and N-acetyl glucosamine. As well as structural component fungal cell walls, chitosan potent antifungal agent. However, the mode action poorly understood. Here, we report that effective for control rice blast disease. application impairs growth fungus Magnaporthe oryzae has pronounced effect ...

n-acetyl-b-d-glucosaminidase was purified by affinity and ionexchange chromatography. two major, a and b, and three minor intermediate forms were isolated and characterized. nag-a and nag-b were purified 440 and 1200 fold with final yields of 16 and 23 percent respectively. each activity was represented by a single protein band. after 70 min preincubation at 55°c a loss of70% activity of nag-a ...

The effects of carbohydrates on the toxicity of p-Aminophenyl arsenoxide (p-APAO) against S. cerevisiae were investigated by Microcalorimetry, including glucose, fructose, lactose, sucrose, N-acetyl glucosamine, 1,3,4,6-tetra-O-acetyl-D-glucosamine (OADG), and chito-oligomer. The toxicity of p-APAO on S. cerevisiae decreased in the presence of OADG or chito-oligomer. Among the test carbohydrate...

Objective(s): The aim of this study was to synthesis new dental nanocomposites reinforced with fabricated glass nanoparticles and compare two methods for fabrication and investigate the effect of this filler on mechanical properties. Materials and Methods: The glass nanoparticles were produced by wet milling process. The particle size and shape was achieved using PSA and SEM. Glass nanoparticle...