نتایج جستجو برای: dopamine hydrochloride

تعداد نتایج: 82461  

Journal: :iranian journal of analytical chemistry 2014
azar bagheri gh.

spectrophotometric and electrochemical studies were successfully used in quantitative analysis of amitriptyline hydrochloride (ath) and nortriptyline hydrochloride (nth). conductometric titration were carried out in equeous solution using iodide and dopamine and serotonine as titrant. two new methods using spectrophotometry are dascribed for the determination of (ath) and (nth) with potassium b...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2009
Li Guo Yan Zhang Quanmin Li

In the present work, we developed a simple, sensitive and inexpensive method to determine dopamine hydrochloride using potassium ferricyanide-Fe(III) by spectrophotometry. The results show that Fe(III) is deoxidized to Fe(II) by dopamine hydrochloride at pH 4.0, and then Fe(II) reacts with potassium ferricyanide to form a soluble prussian blue (KFe(III)[Fe(II)(CN)6]). The absorbance of this pro...

2014

DESCRIPTION Dopamine Hydrochloride and 5% Dextrose Injection, USP is a sterile, nonpyrogenic, prediluted solution of dopamine hydrochloride in 5% dextrose injection. It is administered by intravenous infusion. Dopamine, a sympathomimetic amine vasopressor, is the naturally occurring immediate precursor of norepinephrine. Dopamine hydrochloride is a white to off-white, crystalline powder, which ...

Journal: :The Journal of pharmacology and experimental therapeutics 2009
Annabelle R Charbit Simon Akerman Peter J Goadsby

Dopaminergic mechanisms have been suggested to play a role in migraine. Here, electrophysiological techniques were used to study the effects of intravenously administered centrally or peripherally active dopamine receptor agonists and antagonists on evoked firing in the trigeminocervical complex (TCC). After establishing baseline firing evoked by electrical stimulation of the dural middle menin...

Journal: :Archives of neurology 2008
Steven A Gunzler Caroline Koudelka Nichole E Carlson Misha Pavel John G Nutt

OBJECTIVE To determine whether low concentrations of a dopamine agonist worsen parkinsonism, which would suggest that activation of presynaptic dopamine autoreceptors causes a super-off state. DESIGN Randomized, double-blind, placebo-controlled, crossover clinical trial. SETTING Academic movement disorders center. PATIENTS Patients with Parkinson disease and motor fluctuations. INTERVEN...

Journal: :The Journal of pharmacology and experimental therapeutics 2005
S Akerman P J Goadsby

Migraine is a common, disabling problem with three phases: premonitory, main headache attack, and postdrome. The headache phase is thought to involve activation of trigeminal neurons, whereas the premonitory and postdrome phases may involve dopaminergic mechanisms. In animal studies, dopamine has been found to cause vasodilation of cranial arteries at very low doses. Using intravital microscopy...

2014
Eagle Yi-Kung Huang Pi-Fen Tsui Tung-Tai Kuo Jing-Jr. Tsai Yu-Ching Chou Hsin-I Ma Yung-Hsiao Chiang Yuan-Hao Chen

AIMS To investigate the role of dopamine in cognitive and motor learning skill deficits after a traumatic brain injury (TBI), we investigated dopamine release and behavioral changes at a series of time points after fluid percussion injury, and explored the potential of amantadine hydrochloride as a chronic treatment to provide behavioral recovery. MATERIALS AND METHODS In this study, we seque...

2013
Ziya Erdem Koç Mustafa Onur Aladag Ahmet Uysal

Two monopodal (2,4-dichloro-6-(3-hydroxytyramine)-1,3,5-triazine) and tripodal (2,4,6-(3-hydroxytyramine)-1,3,5-triazine) s-triazine derivatives were prepared through the reaction of cyanuric chloride (2,4,6-trichloro-1,3,5-triazine) and 3-hydroxytyramine hydrochloride (dopamine hydrochloride). The structures of the compounds were identified by FT-IR, 1H NMR, 13C NMR, thermal analysis and eleme...

Journal: :American journal of physiology. Heart and circulatory physiology 2003
Karl-Heinz Huemer Gerhard Garhofer Claudia Zawinka Elisabeth Golestani Brigitte Litschauer Leopold Schmetterer Guido T Dorner

We performed a randomized, subject-blinded, placebo and time-controlled, two-way crossover study in 12 healthy male subjects. Placebo or dopamine was administered on two separate study days. After saline infusion, dopamine hydrochloride was infused in three consecutive doses (5, 10, and 15 microg x kg(-1) x min(-1)). Plasma levels of dopamine were determined at each perfusion step. Arterial and...

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