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At least 19 recordsLinked to original sources
PubMed1978

[Breeding of a biotype of the aphia Myzus persicae on a synthetic medium. IV. Influence of vitamins, especially vitamin C and pyridoxine, on the nutritional value of nutritive fluids].

The nutritive value of synthetic diets for Myzus persicae was evaluated by measuring reproduction of the third generation on each medium: 1. In the presence of a double dose of pyridoxin, the nutritional value of the basic diet was improved. This improvement disappeared when all the vitamins of the B group were also at double dose; 2. In the presence of a double dose of ascorbic acid, the nutritional value of all the diets was improved. This improvement was observed for a single or a double dose of pyridoxin and a single or a double dose of all the vitamins of the B group. The beneficial effect of a double dose of pyridoxin was not adding with the beneficial effect of a double dose of ascorbic acid; 3. A double dose of EDTA was detrimental to the aphid but a double dose of ascorbic acid was sparing this detrimental effect. The results are discussed in relation with the nutritional needs in vitamins and the action of the vitamins in the mineral nutrition of the aphid.

Animals↗
PubMed1993

The energy value for and nutritive value of para-rubber seed for rats.

The digestible (DE) and metabolizable energy (ME) of full-fat and defatted rubber seed meals (FRS and DRS) were determined with weanling albino rats fed diets in which the meals replaced either 20 or 40% glucose monohydrate in the reference diet. The nutritive value of both FRS and DRS included at 10, 20 and 30% of the diet as substitutes for groundnut meal and yellow maize was studied with 56, 28-day-old albino rats of the Wistar strain. The trial lasted 28 days. Nutrient digestion and nitrogen retention were studied at the end of the second week on test. The DE and ME for FRS were on average 24.7 +/- 1.30 and 21.7 +/- 0.80 hy/g dry matter and those for DRS were 15.3 +/- 0.97 and 13.8 +/- 0.46 hy/g dry matter. Incorporation of rubber seed meals at increasing levels in the diet significantly depressed gains and worsened feed/gain ratio (P < 0.01), the diet containing 30% FRS or 20 and 30% DRS being significantly inferior to the control and the diet with 10% FRS or DRS. Significantly (P < 0.01) superior gains but not feed intake and efficiency were obtained for FRS compared to DRS. Percent intake -N retained also decreased with increasing rubber seed levels in the diet. Except for the significantly (P < 0.05) higher crude fibre digestibility of the control diet compared with those containing 20 or 30% FRS or DRS, the digestibilities of other nutrients were not significantly different.

Animal Feed↗
PubMed1990

[Nutritional value of daily food rations reproduced in several regions of the country. Part II. Nutritional value of protein].

The amount and quality of protein were determined in daily food rations of workers, including blue collar and white collar ones, which were reproduced in the laboratory on the basis of the data provided by the Central Statistical Bureau concerning the mean annual food consumption in 1986 (studies on household budgets). The amount of protein in the daily food ration of blue collar workers was higher (76 g) than in the families of white collar workers (68 g). The amount of energy provided by protein (12%) and the degree of coverage of the requirements for protein (mean 92%) were similar in both rations. The nutritional value of protein expressed as the NPU coefficient of protein utilization was relatively low in both rations (mean 66%). A comparison of these food rations in the years 1973, 1980, 1981 and 1986 showed that in 1980 the rations had the highest protein content (mean 93 g daily)--the highest proportion of protein-derived energy (mean 14%) and the highest proportion of protein requirement coverage (mean 120%). The nutritional value of protein (NPU, mean value 71%) was similar to that in 1973 and 1981. As compared to the preceding years the food rations in 1986 showed the lowest coverage of protein requirements and lower nutritional value as expressed with the NPUop index. A high correlation was found between the amino acid composition of dietary protein obtained by chemical analysis and those calculated from the Tables of Composition and Nutritional Value of Food Products.

Dietary Proteins↗
PubMed1980

Alternate lunch patterns in high schools. IV. Nutritive value.

The nutritive value of lunches in forty-eight high schools was assessed using alternate methods of menu planning. Using Type A, Basic 4, and free-choice patterns, the nutrient levels in lunches consumed were not significantly different from those of lunches using the Type A "offer vs. serve" pattern. For boys, lunches as consumed were significantly below the goals for calories, thiamin, and iron in all groups. For girls, lunches as consumed were significantly below the goal only for iron.

Adolescent↗