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Biomedical subjects

A Zakrzewski

Publications and source records attributed to A Zakrzewski.

78 records · Page 5Linked to original sources
PubMedDate not supplied

Nasal mucosa in the iron deficient state. A clinical and electron-microscopic study.

Good results of iron therapy obtained in ozena patients with significantly lowered serum iron level encouraged studies on the pathogenesis of the disease. In electron microscopic examinations, special attention was paid to the considerable disintegration of connective-tissue stroma in the mucosa. In some connective-tissue cells ferruginous micelles were found in the mitochondrial matrix. Mitochondrial deposits may be a morphological expression of disturbed iron metabolism at subcellular levels.

Cytoplasm↗
PubMedDate not supplied

Identification and discrimination of speech sounds in monosyllabic meaningful words and nonsense words by children.

297 children aged 9-14 with normal hearing and intelligence level were examined by speech audiometry. Ten lists with monosyllabic meaningful and nonsense words were used. All the lists were phonemically and structurally balanced in the same way and were applied with an intensity level varying between 26 dB and 61 dB. The identification and discrimination scores for Polish speech sounds were calculated from written-response sheets. The identification scores were generally significantly lower for nonsense words, and up to a certain extent, increased with age. An examination of the discrimination scores showed that confusions were related to the distinctive features of the phonemes. The results represent the first stage of a project on speech sound identification in children and may have practical implications for the rehabilitation of children with hearing loss.

Adolescent↗
PubMedDate not supplied

Speech audiometry for children and subjective probability of Polish words.

Word lists used for speech audiometry should fulfill a number of conditions in order that the results of hearing tests be unambiguous and directly interpretable not only in terms of possible hearing loss but also in terms of the neurolinguistic decoding process. In order to construct a proper word list, it was decided to attempt to estimate the subjective probability of word occurrence in schoolchildren. Nine different lists of over 300 words each were prepared, containing words of all assumed degrees of familiarity. In the preliminary stage, the lists were presented to 600 children in primary and secondary schools. The children were asked to mark each word with a number indicating their relative familiarity with the word. The answers were examined for homogeneity.

Audiometry↗