The wine spoilage yeast Dekkera bruxellensis was evaluated for the production of 4-ethylphenol under low concentrations (0.02–20 g L ) of glucose and fructose in synthetic media. Measurable amounts of 4-ethylphenol were produced over 0.2 g L 1 of each sugar. The yeast growth rate and amount of biomass formed increased from 0.2 to 20 g L 1 of glucose or fructose, being accompanied by increasing ...

The inability of a particular Escherichiu coZi mutant to form colonies on fructose minimal medium is ascribed to the inhibition of growth by glucose 6-phosphate, which accumulates in this strain from a small amount of glucose in the fructose. This explanation requires that fructose metabolism not be initiated by its phosphorylation to fructose 6-phosphate. Experiments in vitro show that fructos...

Biosurfactants produced by Lactobacillus fermentum RC-14, L. rhamnosus GR-1 and 36, and L. casei Shirota were found to contain proteins that bind to both collagen types III and VI, as determined by surface-enhanced laser desorption/ionization (SELDI)-time of flight mass spectrometry. Both collagen types III and VI immobilized on SELDI preactivated ProteinChip arrays detected several different s...

Micropropagation of Ilex dumosa var. dumosa R. ("yerba señorita") from nodal segments containing one axillary bud was investigated. Shoot regeneration from explants of six-year-old plants was readily achieved in 1/4 strength Murashige and Skoog medium (1/4 MS) plus 30 gr x L(-1) sucrose and supplemented with 4.4 microM BA. Further multiplication and elongation of the regenerated shoots were obt...

Maize (Zea mays L.) endosperm suspension cultures are a useful model system for studying biochemical and physiological events in developing maize endosperm. In this report, sugar uptake by the cultures is characterized. Uptake of (14)C-labeled fructose and l-glucose was linear with time, while the rate of uptake of radioactivity from sucrose increased over a 120 min period. Both saturable and l...

The title compound, C6H12O6, was crystallized from an aqueous solution of equimolar mixture of d- and l-fructose (1,3,4,5,6-penta-hydroxy-hexan-2-one, arabino-hexulose or levu-lose), and it was confirmed that d-fructose (or l-fructose) formed β-pyran-ose with a (2) C 5 (or (5) C 2) conformation. In the crystal, two O-H⋯O hydrogen bonds between the hy-droxy groups at the C-1 and C-3 positions, a...

Let v(G) and γ(G) denote the number of vertices and the domination number of a graph G, respectively, and let ρ(G) = γ(G)/v(G). In 1996 B. Reed conjectured that if G is a cubic graph, then γ(G) ≤ dv(G)/3e. In 2005 A. Kostochka and B. Stodolsky disproved this conjecture for cubic graphs of connectivity one and maintained that the conjecture may still be true for cubic 2-connected graphs. Their m...

Abstract Background Non-alcoholic fatty liver disease (NAFLD) is an emerging global health problem that accompanied the obesity epidemic and considered as hepatic component of metabolic syndrome (MetS). Modification lifestyle MetS patients remains focus to reverse prevent progression steatosis NAFLD its worsening severe forms. The present study investigates possible curability -associated grade...

The inability of a particular Escherichiu coZi mutant to form colonies on fructose minimal medium is ascribed to the inhibition of growth by glucose 6-phosphate, which accumulates in this strain from a small amount of glucose in the fructose. This explanation requires that fructose metabolism not be initiated by its phosphorylation to fructose 6-phosphate. Experiments in vitro show that fructos...