Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “SPECIFIC GRAVITY”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 415 records · Page 23Linked to original sources
PubMedDate not supplied

[Specific gravity of the dried biomass of pure bacterial cultures].

The weight of wet and dry biomass taken from colonies after growth on MPA was determined in pure bacterial cultures of Pseudomonas denitrificans and Brevibacterium imperiale, and the number and dimensions of bacterial cells in dry preparations of the same colonies were measured by means of membrane filters. The average specific weight of dry biomass was found to be 1.68 and 1.62. In calculating the weight of bacterial biomass in pure cultures and natural cenoses, its volume should be assayed taking into account the number and dimensions of the cells in dry preparations on membrane filters and multiplying by a coefficient 1.6.

Bacteria↗
PubMed2006

Fractional sodium excretion, urinary osmolality and specific gravity in preterm infants fed with fortified donor human milk.

OBJECTIVE: This research was performed with the objective of investigating the renal effects on premature newborn infants of fortifying banked donor human milk. METHODS: Clinical intervention trial, of the before-and-after type, involving 28 premature newborn infants split into two groups by postconceptional age at the start of the study: GI < 34 weeks (n = 14) and GII >or= 34 weeks (n = 14), and assessed at three sample points: S1, on unfortified donor human milk, S2, after 3 days, and S3, after 10-13 days on fortified donor human milk. Nutrient intake, weight gain, fractional sodium excretion, urinary osmolality and specific density were compared with two-way ANOVA for repeated measures. RESULTS: Fluids, energy and sodium intakes were similar for both groups, and weight gain was satisfactory. Among the preterms with < 34 weeks postconceptional age, serum sodium was lower at the end of the study and the fractional sodium excretion was elevated at the start and at the end of the study (S1 = 2.11+/-1.05; S2 = 1.25+/-0.64; S3 = 1.62+/-0.88), with a significant difference in relation to GII (S1 = 1.34+/-0.94; S2 = 0.90+/-0.54; S3 = 0.91+/-0.82). Osmolality and urinary specific density were normal, with no differences between groups or collection dates. CONCLUSIONS: No adverse effects on the renal function of these preterms were detected as a result of being fed fortified donor human milk.

Analysis of Variance↗
PubMed1976

The rapid determination of carcass fat by the Foss-Let specific gravity technique.

1. Carcass fat was determined by extraction with tetrachloroethylene and measurement of the solvent's change in density. The results were comparable in precision to those of a reference method; the new method extracted storage lipid but little structural lipid. 2. The technique is simple, rapid and appropriate for many nutritional studies.

Adipose Tissue↗
PubMed1978

[Automatic measurement of specific gravity of nutritional beverages].

Using an electronic densimeter introduced a few years ago, a completely automatic system has been developed, allowing more than 400 measurements to be performed daily, with very little human intervention. The repeatability shows a standard deviation of 0.5 10(-5) to 1.6 10(-5), according to the type of sample analyzed. The correlation between measurements performed with this device and those performed with pycnometers is excellent. Another important advantage is that laboratory assistants need no special training before obtaining very sound results.

Beverages↗
PubMed1977

[Enzyme activities in normal platelets of different specific gravity (author's transl)].

Platelets of normal persons were separated into five fractions by centrifugation in discontinuous Ficoll density gradients. Enzyme activities of lactic dehydrogenase, phosphoglycerate kinase, glyceraldehyde phosphate dehydrogenase, pyruvate kinase, glucose-6-phosphate dehydrogenase and content of protein were constantly higher in the heavy fraction IV compared with the light fraction I. With regard to the platelet volume, however, these differences were compensated almost completely.

Blood Platelets↗
PubMedDate not supplied

Signal flare phenomenon as active bleeding in retroperitoneal hematoma with hematocrit effect on dynamic CT scan: three clinical cases and experimental study based on a specific gravity theory.

The contrast medium was observed as a thin line indicating active bleeding in the cellular component and stayed at the boundary between the plasma and cellular components in liquefied hematomas. We could also reproduce the same phenomenon in an experimental study using human blood. The characteristic dynamic motion of the contrast medium demonstrated in the liquefied hematoma, which we have called the "signal flare" phenomenon, is a significant sign indicating active bleeding.

Aged↗