Results 261 to 270 of about 2,899,384 (314)

Salt Concentration and Fibrinolytic Activity

Nature, 1959
THE observation of gross spontaneous lysis in pathological states presents little difficulty, so long as there is some fibrinogen left to form an observable clot; but there is still no satisfactory method of assessing the normal blood fibrinolytic activity.
M, BUCKELL, M, TRUSCOTT
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Active and Total Ghrelin Concentrations in the Newborn

Journal of Pediatric Endocrinology and Metabolism, 2005
Ghrelin is a peptide with a potent capacity to release GH and other metabolic activities. An acyl modification is indispensable for biological activity. Acylated and desacylated forms of ghrelin are both present in the blood. No data exist about the ratio between active ghrelin and total ghrelin in the first period of life.To investigate whether ...
PIRAZZOLI, PIERO, LANARI, MARCELLO, ZUCCHINI, STEFANO, GENNARI, MONIA, PAGOTTO, UBERTO, De Iasio R, PASQUALI, RENATO, CASSIO, ALESSANDRA, CICOGNANI, ALESSANDRO, CACCIARI, EMANUELE   +9 more
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Standardization of 142 Pr activity concentration

Applied Radiation and Isotopes, 2018
142Pr (praseodymium-142), a potential radionuclide for brachytherapy, was produced after irradiating high purity natural Pr2O3 powder in a research reactor. The irradiated powder was then dissolved in acids and diluted for measurement. Several radioactivity measurement methods were used in the standardization of 142Pr radionuclide.
Emin, Yeltepe, Haluk, Yücel
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Activity–Concentration Relationships

2022
Abstract This chapter describes the relationships between thermodynamically ideal concentrations, called activities, and the standard ways we measure and report chemical concentrations. Activities and concentrations are related by activity coefficients, and relationships defining such coefficients are described for gases, liquids, ionic ...
Patrick L. Brezonik, William A. Arnold
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Analysis of active antibody concentration. Separation of affinity and concentration parameters

Journal of Immunological Methods, 1993
Antibody binding to surfaces with differing amounts of immobilised antigen was measured in a biosensor system using surface plasmon resonance detection. Binding rates obtained during the initial binding phase on high density antigen surfaces were proportional to antibody concentration and independent of antigen-antibody affinity.
R, Karlsson, L, Fägerstam, H, Nilshans, B, Persson   +3 more
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Water activity and substrate concentration effects on lipase activity

Biotechnology and Bioengineering, 1997
Catalytic activity of lipases (from Rhizopus arrhizus, Canadida rugosa, and Pseudomonas sp. was studied in organic media, mainly diisopropyl ether. The effect of water activity (a(w)) on V(max) showed that the enzyme activity in general increased with increasing amounts of water for the three enzymes.
E, Wehtje, P, Adlercreutz
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Serum concentrations and antituberculosis activity of thiacetazone

Tubercle, 1974
Abstract New ultraviolet, colorimetric and fluorimetric methods are described for the determination of thiacetazone concentrations down to 0.3–0.6 μg/ml in serum and urine. Similar results were obtained when the different methods were applied to sera from patients being treated with thiacetazone-containing regimens.
G A, Ellard, J M, Dickinson, P T, Gammon, D A, Mitchison   +3 more
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The relation of seismic activity and radon concentration

AIP Conference Proceedings, 2014
Radon, which is the largest source of natural ionizing radiation, reaches to surface as gas or dissolved form in the ground water. Emanation of radon can has a profile is disposed to increasing or decreasing depending on the effects of meteorological events or crust movements. In this work, the radon concentration in soil gas, which is transported from
Vogiannis, Efstratios, Kulali, Feride, AKKURT, İskender   +2 more
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Complement activation in stored platelet concentrates

Transfusion, 1993
Activation of platelets during preparation and/or storage of platelet concentrates in plastic containers at room temperature has recently been recognized. Many different biologic causes of this activation have been postulated. Activated complement, as a multi‐enzyme system, is one of the possible sources of molecules leading to platelet activation.
V D, Miletic, O, Popovic
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Estradiol concentration and the regulation of locomotor activity

Physiology & Behavior, 1995
We predicted that female prairie voles (Microtus ochrogaster) would not increase in locomotor activity during "induced" proestrus. We developed and tested two alternative a priori hypotheses to explain this predicted lack of activity. The Non-Response Hypothesis in which voles cannot, physiologically, increase activity in response to estradiol and, the
B S, Cushing, S, Marhenke, P A, McClure
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