Beta Exponential Distribution
Mostrando 1-8 de 8 artigos, teses e dissertações.
-
1. Modelo de mistura padrão com tempos de vida exponenciais ponderados
In this work, we brie_y introduce the concepts of long-term survival analysis. We dedicated ourselves exclusively to the standard mixture cure model from Boag (1949) and Berkson &Gage (1952), showing its deduction and presenting the imunes probability function, which is taken from the model itself and we investigated the identi_ability issues of the mixture
Publicado em: 2010
-
2. Nanosecond flash photolysis study of carbon monoxide binding to the beta chain of hemoglobin Zürich [beta 63(E7)His leads to Arg].
Binding of carbon monoxide to beta chains of hemoglobin Zürich has been studied by flash photolysis over the time range of nanoseconds to seconds at temperatures from 20 to 300 K. From 20 to 200 K a single rebinding process (process I) is seen, characterized by a distribution of barrier heights with a peak enthalpy of 2.3 kJ/mol. Above 200 K some ligands es
-
3. Differential properties of two charge components in frog skeletal muscle.
Charge movement in frog twitch muscle fibres bathed in a moderately hypertonic solution (containing 350 mM-sucrose) showed a main component (Q beta) and a secondary hump (Q gamma). Assuming that Q beta decays with a single exponential and Q gamma follows the time course of a symmetrical bell, a mathematical model was developed to separate Q gamma from Q beta
-
4. P2X purinoceptors in cultured myenteric neurons of guinea-pig small intestine.
1. Fast excitatory postsynaptic currents (fEPSCs) and responses to exogenously applied purinoceptor agonists were studied in primary cultures of myenteric neurons from guinea-pig small intestine. Whole-cell and outside-out configurations of the patch clamp technique were used. Hexamethonium (100 microM) partly inhibited fEPSCs in 28% of neurons. Hexamethoniu
-
5. Effects of external tetraethylammonium ions and quinine on delayed rectifying K+ channels in mouse pancreatic beta-cells.
1. The whole-cell and outside-out patch configurations of the patch-clamp technique were used to study the mechanisms of block produced by external tetraethylammonium ions (TEA+) and quinine on delayed rectifying K+ channels in mouse pancreatic beta-cells. 2. In whole-cell recordings, TEA+ blocks the delayed outward current (which reflects the activity of de
-
6. Stimulation of the KATP channel by ADP and diazoxide requires nucleotide hydrolysis in mouse pancreatic beta-cells.
1. The mechanisms by which ADP and the hyperglycaemic compound diazoxide stimulate the activity of the ATP-regulated K+ channel (KATP channel) were studied using inside-out patches isolated from mouse pancreatic beta-cells maintained in tissue culture. 2. The ability of diazoxide and ADP to increase KATP channel activity declined with time following patch ex
-
7. Kinetic characterization of rat brain type IIA sodium channel alpha-subunit stably expressed in a somatic cell line.
1. The rat brain type IIA Na+ channel alpha-subunit was stably expressed in Chinese hamster ovary (CHO) cells. Current through the expressed Na+ channels was studied using the whole-cell configuration of the patch clamp technique. The transient Na+ current was sensitive to TTX and showed a bell-shaped peak current vs. membrane potential relation. 2. Na+ curr
-
8. Conductance and kinetic properties of single nicotinic acetylcholine receptor channels in rat sympathetic neurones.
1. The unitary conductance of nicotinic acetylcholine (ACh) receptor channels in rat sympathetic neurones has been studied. Conductance estimates varied from 26-48 pS with a mean of 36.8 pS in 1 mM-Ca2+. The main conductance level varied from patch to patch and the presence (or absence) of additional conductance levels also varied. 2. The channels showed lar