共查询到20条相似文献,搜索用时 15 毫秒
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In an oral calcium-loading test performed on 10 infants with vitamin-D deficiency rickets and low fasting calcium levels, a comparison of results before and after therapy showed that vitamin D raised the serum calcium level at each stage of the test and altered the response so that a more rapid and substantial rise and fall in serum calcium occurred.The effects of vitamin D therapy on newborn infants with hypocalcaemic hyperphosphataemic tetany in another study suggests that these infants should be treated in this way to make them more responsive to oral calcium therapy. 相似文献
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A. H. Harcourt 《Ethology : formerly Zeitschrift fur Tierpsychologie》1978,48(4):401-420
In many primate species, more ♂ ♂ than ♀ ♀ leave their natal group and transfer to another. In man, chimpanzee and the gorilla, however, the reverse is the case. This paper presents detailed data for the gorilla on individuals' movements into and out of breeding units. Comparisons are made with other primates, and with data on two non-primate species in which ♀♀ rather than ♂ ♂ move between breeding units. Proximate causes and functions of emigration and transfer are considered, and the reasons (proximate and evolutionary) for the observed sex differences in frequency of movement are discussed. 相似文献
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N. OKAFOR 《Journal of applied microbiology》1975,38(2):81-88
The bacteria isolated from samples of wine produced by the fermentation of the saps of Elaeis and Raphia palms were identified as Micrococcus, Leuconostoc, Streptococcus, Lactobacillus, Acetobacter, Serratia, Aerobacter (Klebsiella), Bacillus, Zymomonas and Brevibacterium . The organisms occurring most frequently belonged to the first 5 genera. The change from c. pH 7 to c. pH 4.5 during fermentation appeared to be due to lactic acid bacteria and/or certain Gram negative bacteria, e.g. Serratia and Aerobacter (Klebsiella) spp. From about the 3rd day onwards, Acetobacter spp. were recovered. 相似文献
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A comparison was made of pillows of various designs and their effects on the flow of air through the respiratory tract of six children who had been found dead in their cots. The effects of alterations in posture and of soaking the pillow with milk were also studied.There was a wide variation in the obstruction to air flow in pillows of different design. A firm pillow which allows air and fluid to pass through it is best, and is probably superior to a mattress covered with a mackintosh and a sheet.External obstruction to respiration could be a contributory factor in some cases of cot death. 相似文献
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Sodium influx and efflux rates from excised Citrus roots werestudied. The sodium fluxes in the free spaces of the roots ofthe salt-sensitive variety Sweet Lime and of the salt-resistantvariety Cleopatra Mandarin were very close to each other. Onthe other hand, the sodium fluxes from intracellular spaceswere considerably lower in the roots of variety Cleopatra Mandarin.The experimental findings were evaluated by compartmental analysisand the rate constants of the sodium fluxes calculated. Thepossible significance of these procedures for the study of saltresistance is indicated. 相似文献
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On the Effective Size of Populations with Separate Sexes, with Particular Reference to Sex-Linked Genes 总被引:6,自引:0,他引:6
A. Caballero 《Genetics》1995,139(2):1007-1011
Inconsistencies between equations for the effective population size of populations with separate sexes obtained by two different approaches are explained. One approach, which is the most common in the literature, is based on the assumption that the sex of the progeny cannot be identified. The second approach incorporates identification of the sexes of both parents and offspring. The approaches lead to identical expressions for effective size under some situations, such as Poisson distributions of offspring numbers. In general, however, the first approach gives incorrect answers, which become particularly severe for sex-linked genes, because then only numbers of daughters of males are relevant. Predictions of the effective size for sex-linked genes are illustrated for different systems of mating. 相似文献
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Benign intracranial hypertension (pseudotumor cerebri), a syndrome common to a number of disorders, is characterized by headaches and blurred vision. The patient is alert and has papilledema without localizing signs. Air studies show normal ventricles under increased pressure. The authors describe 61 consecutive cases of this pseudotumour, 48 of which were in fat young women, and propose that this group represents a clinical entity that has hitherto received little attention.In these 61 patients, 40 complete-exchange pneumoencephalograms showed normal ventricles, normal fluid volume and prominent cortical sulci. In 32, subtemporal decompression resulted in prompt and lasting relief. Three patients had late convulsive seizures after surgery. Seven patients had nasal quadrantanopsias, the implications of which are discussed. The authors believe that the high intracranial pressure in this condition is due to cerebral hyperemia, not brain edema. Further investigation will perhaps demonstrate a relationship between obesity, vascular dilatation and increased intracranial pressure. 相似文献
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O. A. Ladipo 《BMJ (Clinical research ed.)》1972,1(5802):721-723
Methods of management of the third stage of labour were compared in 200 cases, noting the effect on feto-maternal transfusion. The incidence of feto-maternal transfusion was found to be 66% in cases managed in the orthodox manner, compared with 33% in those in whom free cord bleeding was allowed. The magnitude of transplacental bleeding was also less when bleeding was allowed. 相似文献