Topic
Melibiose
About: Melibiose is a research topic. Over the lifetime, 1002 publications have been published within this topic receiving 27300 citations. The topic is also known as: Melibiose.
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TL;DR: Gas chromatography was successfully used for the first time to determine the components of natural sugar meals in individual mosquitoes and to determine whether carbohydrases are present in the crops of these insects.
Abstract: Gas chromatography (GC) was successfully used for the first time to determine the components of natural sugar meals in individual mosquitoes and to determine whether carbohydrases are present in the crops of these insects. Crops of wild mosquitoes collected from a 2-ha cypress swamp north of Gainesville, FL, contained fructose, glucose, sucrose, maltose, turanose, melibiose, erlose, melezitose, raffinose, and a few unidentified carbohydrates. Time course studies with male and female Aedes albopictus showed rapid hydrolysis (> 90%) of sucrose occurring within 2 h of ingestion, whereas melezitose remained relatively unchanged even 8 h after ingestion. The crop extraction/GC analysis technique is an improvement over the cold anthrone test traditionally used for sugar analysis. This procedure is a rapid one-step process used to determine natural sugar sources, hydrolysis, occurrence, and preferences for individual wild sugar-feeding Diptera.
12 citations
TL;DR: Findings related to (1) the effect of plasma on the liberation of amylase, and (2) the formation of a starch-like substance are reported.
Abstract: Summary: Certain strains of Streptococcus pyogenes produced a starch-like substance in the presence of maltose and plasma. Amylolytic strains of group A streptococci produced larger amounts of the substance than other strains of these organisms. The substance was elaborated in the presence of optimal concentrations of plasma, with either starch, glycogen or maltose in the medium. It was not produced when either glucose-1-phosphate, glucose, cellobiose, melibiose, saccharose or lactose was substituted for maltose.
The amylolytic properties of certain strains of group A streptococci were reported by Keogh & Simmonds (1940) and by Crowley (1950,1954). The latter found that amylase production was a property of certain variants, and that amylase-positive organisms not infrequently lost the property during subculture on medium containing plasma. The effect of serum and plasmaon amylase production was further studied, and this paper reports findings related to (1) the effect of plasma on the liberation of amylase, and (2) the formation of a starch-like substance.
12 citations
TL;DR: In this paper, the impact of different carbon sources on the antibiotic production by Streptomyces hygroscopicus CH-7 was studied with the main goal to increase the yield of antibiotics hexaene H-85 and elaiophylin.
Abstract: The impact of different carbon sources on the antibiotic production by Streptomyces hygroscopicus CH-7 was studied with the main goal to increase the yield of antibiotics hexaene H-85 and elaiophylin. Glucose, as a basic carbon source in the nutrition medium, was replaced with glycerol, xylose, sorbose, melibiose, inulin, and mannitol (15 g/dm3). Insuring the maximum yields of hexaene and elaiophylin of 192 and 88 μg/cm3, respectively, glycerol was shown to be the best carbon source among the investigated ones.
12 citations
TL;DR: Novel branched cycloisomalto-octaoses (CI 8 s) were enzymatically synthesized by transgalactosylation with α-galactsidase from coffee bean and β-Galactosidase preparations from Penicillium multicolor and Bacillus circulans using melibiose and lactose as donor substrates.
11 citations
01 Jan 1978
TL;DR: Actinomyces viscosus T14V andStreptococcus sanguis 34 coaggregate by a mechanism which is not inhibited by NaCl, isdextran independent, requires calcium, ispH dependent withan optimum atpH 8.0to8.5, and appearsto require the interaction ofa protein orglycoprotein on A.viscosus witha carbohydrate on S.sanguis.
Abstract: Actinomyces viscosus T14VandStreptococcus sanguis 34coaggregate bya mechanism whichisnotinhibited by1M NaCl, isdextran independent, requires calcium, ispH dependent withan optimumatpH 8.0to8.5, andappearsto require theinteraction ofa protein orglycoprotein on A.viscosus witha carbohydrate on S.sanguis. Thecoaggregation isinhibited more than80%by0.01M lactose, 0.02M /l-methyl-D-galactoside, or 0.05M D-galactose; inhibition of coaggregation was lessthan10%in0.1M a-methyl-D-galactoside, melibiose,
11 citations