Sulphite inhibited growth of all four yeasts studied, Zygosaccharomyces bailii NCYC 563 being most sensitive and Saccharomyces cerevisiae NCYC 431 the least. Vertical Woolf-Eadie plots were obtained for initial velocities of 35S accumulation by all four yeasts suspended in high concentrations of sulphite. Equilibrium levels of 35S accumulation were reached somewhat faster with strains of S. cer...

Paper sheets from Iranian olive tree produced by soda, sulphite and kraft pulping.Then the influence of pulp beating on properties of paper sheets was studied. Kraft pulp exhibited the highest holocellulose/yield -cellulose/yield ratios and the sulphite pulp the soda pulp the highest lignin/yield ratio. Paper sheets from kraft with the breaking length 5851 m, stretch 4.61%, Burst index 4.48 KN/...

The influence of different anions on the stability of mercury in absorbing solutions containing sulphite ions was investigated. The re-emission of gaseous mercury in the presence of fluoride, chloride, bromide, nitrate, carbonate and sulphate ions from the scrubbing solution was determined. Fluoride, chloride and bromide ions contribute to mercury stabilization, bromide being the most efficient...

In purple sulphur bacteria of the family Chromatiaceae sulphite oxidation via intermediary formation of adenylylsulphate is an enzymologically well characterized process. In contrast, the role of an alternative direct oxidation pathway via the enzyme sulphite:acceptor oxidoreductase has not been resolved. This paper reports the cloning of the genes encoding the adenylylsulphate-forming enzyme a...

Background: Dried fruit is one of the main sources of sulphur dioxide (SO2) exposure. The major goal of the current study was to determine SO2 concentration in some widely consumed dried fruits in Hamadan, Iran. In addition, an estimate of sulphite intake was made through the aforementioned dried fruit. Methods: Totally, 126 dried fruit samples were randomly collected from local market in Hama...

BACKGROUND Molybdenum cofactor deficiency (resulting in combined deficiencies of the enzymes sulphite oxidase, xanthine dehydrogenase and aldehyde dehydrogenase) and isolated sulphite oxidase deficiency are inherited metabolic diseases which follow an autosomal recessive trait of inheritance. Detection of these diseases in selective screening for inborn errors of metabolism is not easy because ...

Sulphite redutctase (E.C. 1.8.1.2) is able to cause the reduction of inorganic sulphite to sulphide. This enzyme has been studied in a number of micro organisms (1, 2, 3, 4, 5). Although the enzyme from Alliutmi, odoruzt has been purified to homogeneity (6, 7) its characterisation is still incomplete. Recently Asada & Bandtirski (8) and Asada et al. (9) have described some of the properties of ...

Quantitative utilization of L-cysteate (2-amino-3-sulphopropionate) as the sole source of carbon and energy for growth of the aerobic, marine bacterium Silicibacter pomeroyi DSS-3(T) was observed. The sulphonate moiety was recovered in the medium largely as sulphite, and the appropriate amount of the ammonium ion was also observed. Genes [suyAB (3-sulpholactate sulpho-lyase)] encoding the known...

1. The initial rapid phase of ATP hydrolysis by bovine heart submitochondrial particles or by soluble F1-ATPase is insensitive to anion activation (sulphite) or inhibition (azide). 2. The second slow phase of ATP hydrolysis is hyperbolically inhibited by azide (Ki approximately 10(-5) M); the inosine triphosphatase activity of submitochondrial particles or F1-ATPase is insensitive to azide or s...

Sulphite redutctase (E.C. 1.8.1.2) is able to cause the reduction of inorganic sulphite to sulphide. This enzyme has been studied in a number of micro organisms (1, 2, 3, 4, 5). Although the enzyme from Alliutmi, odoruzt has been purified to homogeneity (6, 7) its characterisation is still incomplete. Recently Asada & Bandtirski (8) and Asada et al. (9) have described some of the properties of ...