Showing papers on "B vitamins published in 1970"

Studies on the Antimicrobial Activity of Olive Phenolic Compounds

Abstract: Summary. Treatment of green olives for 2 min with dilute hot alkali before brining increased the release of sugars, B complex vitamins, amino acids and phenolic compounds, and enhanced the establishment of lactic acid bacteria in the brine. Two components of the ethyl acetate extract of green olives, which showed an antibacterial activity, were isolated and identified as the glycoside oleuropein and its phenolic aglycone. The inhibition of Lactobacillus plantarum by the ethyl acetate extract or by oleuropein was augmented by reducing the concentration of organic nitrogenous compounds, increasing the NaCl concentration in the assay medium and decreasing the inoculum size. Besides its activity towards various bacteria, oleuropein inhibited the growth of Geotrichum candidum Link, Rhizopus sp. and Rhizoctonia solani Kuhn. On the basis of these findings, an explanation for some problems in the lactic fermentation of green olives is suggested.

B Vitamin Requirements of Carp-III

Abstract: The requirement and deficiency symptoms of young carp for choline have been studied. Carp fed a diet low in choline accumulated a large quantity of neutral fat in the hepatic tissue. This abnormality corresponded to fatty liver of mammals in chemical and histological conclusions. Amount of choline chloride needed for prevention from fatty liver of young carp was 60-120 mg per kg of body weight per day under the experimental conditions adopted.

Feeding Acceptability of Certain Insects and Various Water-Soluble Compounds to Two Varieties of the Imported Fire Ant

Abstract: Studies were carried out to determine the preference of two varieties of the imported fire ant, Solenopsis saevissima richleri Forel, and Solenopsis saevissima saevissima Smith, for various common insects as food, using whole and crushed insects as well as ether and water extractions. In addition, several sugars, amino acids, and B vitamins were tested for acceptability. A wide assortment of insect species tested were readily accepted: however, several species were consistently rejected by the ants. In general, the acceptance of amino acids by the ants was equal to or less than water for both ant varieties. Leucine, however, was found to be several fold more attractive than water and as acceptable as the best sugars. Both varieties were similar in their preferences for melezitose, sucrose, and dextrose (in all cases considerably higher than the water standard) and in their rejection of xylose, ribose, mannose. arabinose, and galactose. Folic acid, B 12 , and Inositol were accepted to a greater extent than the water standard, but none of the B vitamins tested were as attractive as the more acceptable sugars or amino acids.

The Stability of the Copper(II)-Eriochrome Red B Complex and the Compleximetric Titration of Copper(II) Ion

Abstract: Values of the conditional stability constant of the copper(II)-Eriochrome Red B complex in aqueous solutions of pH 3–6 have been determined employing a cupric ion electrode. When the ionic strength of the solution is 0.01, the value of the second acidity constant (pk2) of Eriochrome Red B is 6.28 and the logarithm of the stability constant of the copper complex, log kCuHI, about 8.2. The complex can be used as an indicator in the ocapleximetric titration of cupric ion with EDTA at pH values from 4 to 8.

The functional capacity of the tryptophan-niacin pathway in pellagrous children.

Abstract: The aim of this work was to study the functional capacity of the tryptophan-niacin pathway in pellagrous children by analysis of several interrelated metabolites excreted in their urine. 2 groups of these patients were studied and compared with appropriate controls; patients with pure pellagra and patients with pellagra associated with parasitic infection. It was found that niacin deficiency led, at least in part, to an inhibition of the NADPH-dependent kynurenine hydroxylase enzyme in patients with pure pellagra. Niacin supplementation (120 mg.) daily for one month did not completely restore the activity of this enzyme in a patient with pure pellagra. The reason for this is still obscure. In contrast, niacin deficiency in pellagra associated with certain parasites, seems to be due to the impairment in the further degradation of 3-hydroxykynurenine to niacin. 1 patient of this group responded clinically and biochemically to treatment with adequate quantities of niacin, B vitamins and balanced diet. The disappearance of the clinical manifestations of pellagra does not necesasrily mean that the patient is biochemically cured. This may imply that under such conditions recurrences of pellagra are possible.