[Metabolic balance of zinc in infants and children].

Zinc metabolism in infants and children was evaluated on the basis of chemical balance studies of this element. The zinc intake chemically measured oscillated in the broad limits from 0,2 to 17,1 mg/d according to the age and to the manner of feeding; the highly positive zinc retentions were obtained only in infants with high intake of this element. Zinc in the diet of infants in some part derived from water.

[Blood of healthy bulls and those with listeriosis with regard to the enzymatic differences in the lymphocytes].

A relationship between esterase positive and esterase negative lymphocytes in peripheral blood of a homogenous group of one-year old healthy bulls of NCB breed was found. Average values of other hematologic indices in these animals were also determined. Then the same indices were examined in bulls experimentally infected with Listeria monocytogenes and compared with the data for healthy animals.

[Recommended nutritional norms for infants and pre-school children].

The authors analyzing the results of investigations carried out the National Research Institute of Mother and Child and in many other competent scientific centres in the world, compare recommended nutritional norms for infants and for pre-school age children. They pay attention to particular characteristics of the developmental dynamics of growth which determine requirements for all food components. The authors present this problem in the light of data resulting from scientific objectivity of this problem creating scientific basis of nutrition.

[Effect of the composition of the caloric pool on the indicators of protein metabolism in infants].

The influences of formula composition (more fat or carbohydrates as a source of energy) upon protein utilization and other indices of protein metabolism was studied. 15 healthy, full-size infants were divided into three groups K,L,M, five infants in every group according, to the formula given to them. The composition of formulas is shown in table I.

[Indicators of protein metabolism in infants with intrauterine dystrophy red various dietary mixtures].

In the previous work published in No 7 of "Development Period Medicine" ( Problemy Medycyny Wieku Rozwojowego ) the results of nitrogen balance studies in S-f-D infants fed different milk formulas were described. The present study concerns other protein metabolism indices in the same infants. The infants were divided into four groups according to the formula they were fed.