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Biomedical subjects

J Williamson

Publications and source records attributed to J Williamson.

At least 271 records · Page 15Linked to original sources
PubMed1972

Mode of cell wall growth of Bacillus megaterium.

The growth of the cell wall of Bacillus megaterium KM was examined by labeling the cell wall uniformly with (3)H-alpha, epsilon-diaminopimelic acid and examining by radioautography the distribution of labeled cell wall material in daughter cells. The results indicate that the label is distributed uniformly to all daughter cells and rule out a single growth point, either central or apical, for these cells. The results strongly suggest that cell wall growth occurs by uniform deposition of new wall over the whole cell surface.

Autoradiography↗
PubMed1971

Otolaryngological aspects of Sjögren's syndrome.

Twenty-two patients with Sjögren's syndrome uncomplicated by a connective tissue disorder, 31 with Sjögren's syndrome complicated by rheumatoid arthritis, and 21 with rheumatoid arthritis alone were studied with particular reference to changes in the ears and in the upper respiratory and digestive tracts.Epistaxis, soreness and dryness of the throat, dysphagia, and hoarseness were common symptoms, and rhinitis sicca and postcricoid narrowing were not uncommon features of the Sjögren groups. Oesophagoscopy in one patient revealed a web identical to that found in Paterson/Brown Kelly syndrome; none of the patients, however, had an iron-deficiency anaemia or koilonychia. There was an increased frequency of deafness in all groups, and the deafness tended to be conductive in the Sjögren groups and sensorineural in the rheumatoid arthritis group.

Adult↗
PubMed1971

Leucocyte ascorbic acid levels and vitamin C intake in older people.

Leucocyte ascorbic acid (L.A.A.) levels and vitamin C intake were measured in a random sample of men and women aged 62-94 years. L.A.A. distributions are positively skewed but log normal. L.A.A. mean values show no age difference in men but are significantly lower in older women. The mean value for all women (23.88mug/10(8) cells) is significantly higher than that for all men (18.11 mug/10(8) cells). L.A.A. values are significantly higher in both sexes in the six months July to December. Vitamin C intake distributions are positively skewed but not improved by log transformation. No significant age or sex differences were found except that a significantly greater proportion of men over than of those under 70 years have intakes less than 30 mg daily. Mean intake is significantly higher in men but not in women in the six months April to September, though in both sexes a significantly greater proportion have intakes less than 30 mg daily in October to March compared with April to September. Fifty per cent. of men and 58% of women have intakes less than 30 mg daily, 23.6% of men and 28.1% of women have intakes less than 20 mg daily, and 4.7% of men and 3% of women have intakes less than 10 mg daily. These percentages increase during the winter. A moderate correlation is present between vitamin C intake and L.A.A. level. L.A.A. levels increase in parallel with but lag behind seasonal increases in vitamin C intake.

Age Factors↗