scholarly journals Fentanyl increases catecholamine oxidation current measured byin vivo voltammetry in the rat striatum

1989 ◽  
Vol 36 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Brian Milne ◽  
Luc Quintin ◽  
Jean-François Pujol
Keyword(s):  
Rat Striatum ◽  
Oxidation Current ◽  
Catecholamine Oxidation

Noradrenergic turnover increases in locus coeruleus after hemorrhage in cats

1988 ◽  
Vol 254 (2) ◽  
pp. R296-R301
Author(s):  
K. V. Thrivikraman ◽  
D. E. Carlson ◽  
D. S. Gann
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Locus Coeruleus ◽  
High Performance ◽  
In Vivo Voltammetry ◽  
Oxidation Current ◽  
Alpha Chloralose ◽  
Catecholamine Oxidation ◽  
Acth Release

Push-pull perfusion was used to determine monoaminergic activity in the locus coeruleus (LC) of alpha-chloralose-urethan-anesthetized cats after 20% hemorrhage. Blood was withdrawn from 0 to 3 min and reinfused from 10 to 13 min. Continuous 5-min interval samples of perfusate were collected from -5 to 15 min. Concentrations of the monoamines were determined using high-performance liquid chromatography with electrochemical detection. The perfusion sites (n = 21) were identified histologically. In a group of eight contiguous sites in the ventral LC (vLC), 4-hydroxy-3-methoxy-phenyl(ethylene)glycol (MHPG) increased significantly from 0.50 +/- 0.22 (control) to 1.19 +/- 0.42 pmol/5 min during the first 5 min after hemorrhage (P less than 0.05). This response differed significantly from that obtained at the remaining 13 sites. Other metabolites were not often detectable for many sites either within or outside vLC, and their responses to hemorrhage were not significant. The response of MHPG in the vLC indicates that norepinephrine (NE) turnover increases in this area selectively and implicates NE in the increase in the catecholamine oxidation current reported previously using in vivo voltammetry. Since the vLC was shown previously to facilitate adrenocorticotropin (ACTH) release, the increase in NE turnover after hemorrhage could induce ACTH release. This increase may also act locally to modulate the ascending hemodynamic signal.

A technique for uranium and plutonium determination using coulometric potentiostatic facility UPK-19 for analysis of mixed-oxide fuel

2020 ◽  
Vol 86 (12) ◽  
pp. 15-22
Author(s):  
N. A. Bulayev ◽  
E. V. Chukhlantseva ◽  
O. V. Starovoytova ◽  
A. A. Tarasenko
Keyword(s):  
Acid Solution ◽  
Mass Fraction ◽  
Background Electrolyte ◽  
Stable State ◽  
Sulfamic Acid ◽  
Oxide Fuel ◽  
Oxidation Current ◽  
Mox Fuel ◽  
Mass Fractions ◽  
Uranium Plutonium

The content of uranium and plutonium is the main characteristic of mixed uranium-plutonium oxide fuel, which is strictly controlled and has a very narrow range of the permissible values. We focused on developing a technique for measuring mass fractions of uranium and plutonium by controlled potential coulometry using a coulometric unit UPK-19 in set with a R-40Kh potentiostat-galvanostat. Under conditions of sealed enclosures, a special design of the support stand which minimized the effect of fluctuations in ambient conditions on the signal stability was developed. Optimal conditions for coulometric determination of plutonium and uranium mass fractions were specified. The sulfuric acid solution with a molar concentration of 0.5 mol/dm3 was used as a medium. Lead ions were introduced into the background electrolyte to decrease the minimum voltage of hydrogen reduction to –190 mV. The addition of aluminum nitride reduced the effect of fluoride ions participating as a catalyst in dissolving MOX fuel samples, and the interfering effect of nitrite ions was eliminated by introducing a sulfamic acid solution into the cell. The total content of uranium and plutonium was determined by evaluation of the amount of electricity consumed at the stage of uranium and plutonium co-oxidation. Plutonium content was measured at the potentials, at which uranium remains in the stable state, which makes it possible to subtract the contribution of plutonium oxidation current from the total oxidation current. The error characteristics of the developed measurement technique were evaluated using the standard sample method and the real MOX fuel pellets. The error limits match the requirements set out in the specifications for MOX fuel. The technique for measuring mass fractions of uranium and plutonium in uranium-plutonium oxide nuclear fuel was certified. The relative measurement error of the mass fraction of plutonium and uranium was ±0.0070 and ±0.0095, respectively. The relative error of the ratio of the plutonium mass fraction to the sum of mass fractions of uranium and plutonium was ±0.0085.

Heterogeneity of spike frequency adaptation among medium spiny neurones from the rat striatum

Neuroscience ◽  
2003 ◽  
Vol 122 (1) ◽  
pp. 77-92 ◽  
Author(s):  
L Venance ◽  
J Glowinski
Keyword(s):  
Spike Frequency ◽  
Rat Striatum ◽  
Spike Frequency Adaptation ◽  
Frequency Adaptation

scholarly journals Chronic haloperidol treatment increased calcium-dependent phosphorylation in rat striatum

Life Sciences ◽  
1982 ◽  
Vol 30 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Yuen-Sum Lao ◽  
Margaret E. Gnegy
Keyword(s):  
Rat Striatum ◽  
Calcium Dependent ◽  
Chronic Haloperidol ◽  
Haloperidol Treatment

Tamoxifen protect against hydroxyl radical generation induced by phenelzine in rat striatum

Toxicology ◽  
2006 ◽  
Vol 222 (1-2) ◽  
pp. 46-52 ◽  
Author(s):  
Toshio Obata
Keyword(s):  
Hydroxyl Radical ◽  
Rat Striatum ◽  
Radical Generation

scholarly journals Effect of the presence of solid particles, on the vanadyl sulfate (VOSO4) oxidation current

2021 ◽  
Vol 373 ◽  
pp. 137909
Author(s):  
C.Y. Sano Moyeme ◽  
R. El Hage ◽  
A. Hassan ◽  
F. Chauvet ◽  
L. Cassayre ◽  
...  
Keyword(s):  
Solid Particles ◽  
Vanadyl Sulfate ◽  
Oxidation Current

scholarly journals Differentiation of solubilized dopamine receptors from spirodecanone binding sites in rat striatum

FEBS Letters ◽  
1980 ◽  
Vol 121 (1) ◽  
pp. 133-138 ◽  
Author(s):  
H. Gorissen ◽  
B. Ilien ◽  
G. Aerts ◽  
P. Laduron
Keyword(s):  
Dopamine Receptors ◽  
Binding Sites ◽  
Rat Striatum

Chronic administration of the enkephalinase inhibitor SCH 34826 reduces D-1 dopamine receptor density in rat striatum

1990 ◽  
Vol 183 (4) ◽  
pp. 1136
Author(s):  
E. Ongini ◽  
M. Trampus ◽  
K. Varani ◽  
P.A. Borea
Keyword(s):  
Dopamine Receptor ◽  
Chronic Administration ◽  
Rat Striatum ◽  
Receptor Density

scholarly journals A novel affinity purification of D-1 dopamine receptors from rat striatum.

1990 ◽  
Vol 265 (17) ◽  
pp. 10065-10072
Author(s):  
A Sidhu
Keyword(s):  
Dopamine Receptors ◽  
Affinity Purification ◽  
Rat Striatum

Chronic ethanol exposure alters dopamine receptor subtypes in rat striatum

1988 ◽  
Vol 20 ◽  
pp. 215
Author(s):  
L. Lucchi ◽  
C.M. Lopez ◽  
R.M. Moresco ◽  
S. Govoni ◽  
M. Trabucchi
Keyword(s):  
Dopamine Receptor ◽  
Ethanol Exposure ◽  
Chronic Ethanol ◽  
Rat Striatum ◽  
Receptor Subtypes ◽  
Dopamine Receptor Subtypes ◽  
Chronic Ethanol Exposure
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