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Biomedical subjects

H Enke

Publications and source records attributed to H Enke.

At least 37 records · Page 2Linked to original sources
PubMed1984

[Effect of orally administered zinc on the inducibility of experimental brain tumors in the rat].

The effect of orally administered zinc on induction and growth of brain tumours in rats was investigated. The brain tumours were induced experimentally by N-ethyl-N-nitrosourea injected subcutaneously in a single dose (17 mg/kg body weight) into newborn BD IX rats. The rats were killed after 180 days. Their brains were cut in serial sections and investigated histologically. The incidence of brain tumours of a control group of rats (group 1) was compared with that of rats which received drinking-water containing 22.8 mmol/l (5.0 g/l) zinc acetate from the 4th week (group 2) or from the 150th day (group 3) after birth. The rats of group 2 developed three times more brain tumours than the rats of the control group. This difference is statistically significant. The incidence of brain tumours in rats of group 3 corresponds to that of the control group. The average size of the tumours was the same in all groups. In the brains of the rats that received zinc with the drinking-water up to the 180th day but without administration of a cancerogen immediately after birth (group 4) we could not find any tumour, neither after 180 nor after 380 days. Our results indicate a cocancerogenic (promotion) effect of zinc in experimental neurooncogenesis of the rat.

Administration, Oral↗
PubMed1983

[Application of three-dimensional contingency tables to histology].

With examples of the morphology of parathyroid glands the application of threedimensional contingency tables to histology is shown. On 138 human parathyroid glands the following qualitative characteristics were established out of among other points: sex, position, predominating type of structure and predominating cells. By analysis of threedimensional contingency tables it has been investigated, if, taking into consideration the position, the sex, or taking into consideration the sex, the position influence the type of structure and the predominating cells of the organs. In both cases it was found a total independence as well as an uneven distribution of cells and types of structure respectively.

Female↗
PubMed1981

Traumatized anterior teeth in Iraqi and Sudanese children--a comparative study.

This epidemiological study describes the prevalence of trauma to the anterior teeth of 6090 Iraqi and 3507 Sudanese primary school children. 7.7% of Iraqi and 5.1% of Sudanese presented incisal trauma. The male to female ratio was 1.3:1 in Iraqis and 2.6:1 in Sudanese. The frequency of trauma to Iraqi females below age nine yr was higher than the males, but the condition was reversed with age. In Sudanese children the frequency was higher in males in all age groups. In general, males suffered a higher rate of trauma in both countries, but the Iraqi children had a significantly higher rate of trauma than the Sudanese in both sexes.

Child↗
PubMed1980

Relation of traumatized permanent anterior teeth to occlusion and lip condition.

A comparative epidemiologic study on traumatized permanent anterior teeth was conducted on 6090 Iraqi and 3507 Sudanese primary schoolchildren. A significant relationship was found between the severity of trauma to protrusion of maxillary incisors and amount of lip coverage in Iraqis and a similar tendency was observed for the Sudanese. In a comparison between the two population groups the frequency of traumatized permanent maxillary incisors with greater tooth loss (types 3 + 4) were significantly higher in Iraqi than in Sudanese children with protrusion and inadequate lip coverage.

Child↗
PubMed1980

[Epidemiological and clinical problems in multiple sclerosis].

After a short discussion of the incidence rate and the distribution of multiple sclerosis in the world, some epidemiological problems are dealt with. Multiple sclerosis is a relatively frequent disease occurring mainly in zones of temperate climate, in highly civilised and technically advanced countries, and it is mainly found among the white (European) race. Clinically important appraisal criteria are pointed out. Retaining or regaining of efficiency and working capacity are regarded as simple assessment criteria of long-term therapeutic efforts.

Adult↗
PubMed1979

[The effect of ethylnitrosourea in the activity of the NAD-linked glycero-3-phosphate dehydrogenase in the Vth nerve of developing rats and its relation to myelination and tumour induction (author's transl)].

The activity of NAD-linked L-alpha-glycero-3-phosphate dehydrogenase (E.C. 1.1.1.8.) in the Vth nerve from albino rats treated with a single subcutaneous injection of ethylnitrosourea in the first day of life and from controls was determined biochemically in 10 different age groups ranging from 7 to 70 days. The specific activities of the controls rise rapidly from the 7--35 days of life and remain there after almost at the same level. The activity of the ENU treated animals is significantly lower than that of the controls and reaches only at the age of 63 days the values of the 35 days old untreated animals. About 26% of the activity values of the treated animals are below the lower confidence limit of the controls.

Age Factors↗