نتایج جستجو برای: mdea

تعداد نتایج: 264  

Journal: :Journal of chromatography. B, Analytical technologies in the biomedical and life sciences 2004
José Luiz da Costa Alice Aparecida da Matta Chasin

This paper describes the development and validation of analytical methodology for the determination of the use of MDMA, MDEA and MDA in urine. After a simple liquid extraction, the analyses were carried out on a high performance liquid chromatography (HPLC) in an octadecyl column, with fluorescence detection. The mobile phase using a sodium dodecyl sulfate ion-pairing reagent allows good separa...

Journal: :Dalton transactions 2016
Sihuai Chen Valeriu Mereacre Christopher E Anson Annie K Powell

Two series of heterometallic Fe(III)-Ln(III) compounds, [FeLn(μ3-OH)2(mdea)4(m-NO2C6H4COO)8]·3MeCN where Ln = Y (1) and Dy (2) and [FeLn(μ4-O)3(μ3-O)(mdea)5(m-NO2C6H4COO)9]·3MeCN where Ln = Y (3) and Dy (4), were synthesized. Compounds 1 and 2 were obtained under ambient conditions, whereas 3 and 4 were obtained via a solvothermal transformation process by heating 1 or 2 at 120 °C in MeCN. The ...

ژورنال: فرآیند نو 2014

اکثرپالایشگاههای تصفیه گاز برای حذف گازهای اسیدی(CO2,H2S) همراه گاز طبیعی با فرایند جذب با حلال شیمیایی فعالیت میکنند.این تحقیق به عملکرد مخلوط حلال فیزیکی وشیمیایی درمنطقه گازی سرخس که باحلال آمینی(MDEA)درحال فعالیت می باشد، و بررسی تخمین هزینه های لازم در بخش حلال پالایشگاه،درغلظتهای مختلف سولفولان در حلال Sulfinol-M دراین پالایشگاه گاز می پردازد.نتایج شبیه سازی حاکی ازاین می باشدکه در صورت ج...

Journal: :Clinical chemistry 2008
Erin A Kolbrich Ross H Lowe Marilyn A Huestis

BACKGROUND 3,4-Methylenedioxymethamphetamine (MDMA, or Ecstasy) is a popular recreational drug. Analysis of MDMA and metabolites in human plasma, particularly in pharmacokinetic studies, requires low limits of quantification. Two-dimensional GC/MS with cryofocusing is a chromatographic technique recognized for its increased selectivity and resolution. METHODS This method simultaneously quanti...

2006
R. Rajesh S. Chattopadhyay M. Kundu

The removal of acid gases from gas streams by using suitable solvent like alkanolamine, commonly referred to as gas sweetening, is a technology that has been in use industrially for over half a century. In this work artificial neural network (ANN) has been used to predict the equilibrium solubility of CO2 over the alkanolamine solvents N-methyldiethanolamine (MDEA) and 2-amino-2-methyl-1-propan...

2008
H. KIERZKOWSKA-PAWLAK

A reaction calorimeter was used to study the rate and heat effects during CO2 absorption into aqueous solutions of N-methyldiethanolamine (MDEA). The experiments were carried out at constant pressure of 0.1 MPa and 0.3 MPa over a range of temperature from 293 K to 333 K. The amine content changed from 10 to 30 mass %. The experimental equipment and procedure were described with the emphasis on ...

Journal: :Industrial & Engineering Chemistry Research 2022

In this work, the absorption–desorption performance of CO2 in six new solvent blends amine (diisopropylamine (DPA), 2-amino-2-methyl-1-propanol (AMP), methyldiethanolamine (MDEA), diethanolamine (DEA), diisopropanolamine (DIPA), and ethanolamine (MEA)), sulfolane, methanol has been monitored using ATR-FTIR spectroscopy. Additionally, NMR-based species confirmation viscosity analysis were done f...

Journal: :MATEC web of conferences 2023

The elimination of impurities from natural gas (water, CO2, H2S, mercaptans) is an obligation: in Europe, a max. 20 mg/Sm3 total sulfur (at 15°C and 1 atm) allowed, as well 2.5 vol% CO2. It maximizes the calorific value delivered limits chemical risks (corrosion, toxicity) associated with this transition fuel to cleaner energy sources. Acid separation commonly performed by reactive gas-liquid a...

A. Ehsani Nejad H. Foroughipour N. Hajilary, S. Sheikhaei

This paper includes the significant on-site experience of the authors related to problems faced in amine systems with fresh amine and their possible solutions in phases#2&3 of South Pars gas                complex. The amine system was designed as a closed circuit system with the primary objective of removing H2S, CO2, and other acidic components from gaseous hydrocarbon streams. Amine plant op...

Journal: :American journal of physiology. Lung cellular and molecular physiology 2004
Daniela Quaglino Huy Riem Ha Elena Duner Daniela Bruttomesso Laurent Bigler Ferenc Follath Giuseppe Realdi Andrea Pettenazzo Aldo Baritussio

Amiodarone, an antiarrhythmic drug toxic toward the lung, is metabolized through sequential modifications of the diethylaminoethoxy group to mono-N-desethylamiodarone (MDEA), di-N-desethylamiodarone (DDEA), and amiodarone-EtOH (B2-O-EtOH), whose effects on lung cells are unclear. To clarify this, we exposed rabbit alveolar macrophages to analogs with different modifications of the diethylaminoe...

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