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Biomedical subjects

H Rafalski

Publications and source records attributed to H Rafalski.

At least 37 records · Page 2Linked to original sources
PubMed1978

Protein utilization in rats receiving a low-protein diet with various limiting amino acids.

1. A study was made of protein utilization in rats given a variety of low-protein diets containing (g/kg) egg albumin 18, casein 49, gluten 50, or mixtures of either maize protein and gelatine 58, or casein and gelatin 37, each with supplemental methionine. The diets were limiting in leucine, tryptophan or lysine, or in both tryptophan and the sulphur-containing amino acids. 2. Values obtained for net protein utilization (NPU) at these low levels of nitrogen intake were markedly higher than the amino acid score calculated for the different test proteins, except with casein for which the two values were similar. The NPU values agreed more closely with chemical score values based on the content of S-amino acids or isoleucine in the dietary protein.

Amino Acids↗
PubMed1978

[Hearing impairment in operators of motor saws].

An otolaryngological and audiometric examination was performed among 901 motor-sawers occupationally exposed to motor-saw noise, and among 177 persons in a non-exposed control group. Hearing impairment of various degrees was found in 83.7% of motor-sawers examined. In 63.5% of motor sawers hearing impairment was due to noise exposure. The hearing impairment found, was in 88% a reciprocal receptive loss, more intensified in the left ear. It was positively correlated with motor-savers' age, duration of employment in exposure to motor-saw noise, and the amount of wood cut. The average hearing impairment in both ears was significantly higher among motor-sawers with hearing damage due to various causes, than among those with damage due to the motor-saw noise only, which proves a simultaneous overlapping of different factors inducing impairment, including motor-saw noise.

Adult↗
PubMed1977

[X-ray changes in the osteoarticular system in sawyers].

X-ray test of the osteo-articular system of upper limbs was carried out on 1231 saweyers and 272 controls as well as 50 intellectuals. Three x-ray tests were carried out on 207 sawyers and on a control group of 95 workers, to assess the progression of osseous changes. The same types od changes were found in sawyers and control group workers; besides similar frequency in the examined parts of the upper limb was found in them. The most frequent changes are: osseous cyst, osteoporosis degenerative-deformative changes and calcar of the ulnar. The greatest amounts of changes were observed in the bones and joints of the hand and next in elbow joint and acromioclavicular joint. It was observed that amoungst the sawyers and the control group workers, the greatest amounts of changes occur after 2 years of work. Progression of osseous changes after 3-4 years of work was observed in 30,9% sawyers and 12,6% control group workers.

Adult↗