Catalan
Albanian
Arabic
Armenian
Azerbaijani
Belarusian
Bengali
Bosnian
Catalan
Czech
Danish
Deutsch
Dutch
English
Estonian
Finnish
Français
Greek
Haitian Creole
Hebrew
Hindi
Hungarian
Icelandic
Indonesian
Irish
Italian
Japanese
Korean
Latvian
Lithuanian
Macedonian
Mongolian
Norwegian
Persian
Polish
Portuguese
Romanian
Russian
Serbian
Slovak
Slovenian
Spanish
Swahili
Swedish
Turkish
Ukrainian
Vietnamese
Български
中文(简体)
中文(繁體)
dichloromethane/nicotina
L'enllaç es desa al porta-retalls
Pàgina 1 des de 64 resultats
Systematic studies on the breakdown of p,p'-DDT in tobacco smokes. Investigations into the presence of methyl chloride, dichloromethane, and chloroform in tobacco smokes.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
Analysis of free and bound volatiles by gas chromatography and gas chromatography-mass spectrometry in uncased and cased tobaccos.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
The free and bound volatiles of tobaccos were analyzed by capillary GC and GC-MS. Bound volatiles were isolated by dichloromethane extraction followed by stream distillation continuous extraction (SDE) at pH 2.5 acid hydrolysis. The bound aromatic compounds were hydrolyzed by acid at pH 2.5, and the
Comparative studies of the mutagenicity of environmental tobacco smoke from cigarettes that burn or primarily heat tobacco.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
The mutagenicity of particulate matter concentrated from environmental tobacco smoke (ETS) from a prototype cigarette that primarily heats tobacco was compared to that of four popular commercially available cigarettes that burn tobacco. ETS was generated by six individuals simultaneously smoking 1
A rapid gas-liquid chromatographic estimation of nicotine in biological fluids.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
A rapid gas-liquid chromatographic method for the estimation of nicotine in plasma is described. Nicotine is extracted from alkalinized plasma into diethyl ether. This is then concentrated by evaporation and, after an acid back extraction is re-extracted into n-heptane (nitrogen detector) or
The analysis of nicotine in infants' hair for measuring exposure to environmental tobacco smoke.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
Hair samples were collected from 24 infants (3-36 months) exposed and non-exposed to environmental tobacco smoke. Hair was washed in dichloromethane, digested in NaOH, extracted by solid-phase extraction and analyzed by high-performance liquid chromatography to determine the content of nicotine and
Gas-liquid chromatographic determination of nicotine and cotinine in plasma.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
We report a procedure for determining nicotine and cotinine in plasma. Nicotine is extracted from 1 ml of plasma with diethyl ether, back extracted, and analyzed by gas-liquid chromatography with a nitrogen/phosphorus detector. Nicotine and its internal standard, modaline, had retention times of 1.9
Method development for the determination of 52 pesticides in tobacco by liquid chromatography-tandem mass spectrometry.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
A method using reversed phase liquid chromatography-electrospray ionization-tandem mass spectrometry was developed for the determination of 52 pesticides in tobacco. The influence of mobile phase additives was investigated to improve sensitivity and accuracy of the method and to reduce matrix
Improved method for routine determination of nicotine and its main metabolites in biological fluids.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
ExtrelutR extraction and glass capillary gas chromatography were applied to the routine determination of nicotine and its metabolites cotinine, nicotine-1'-N-oxide and cotinine-1-N-oxide in urine and plasma. After extraction of nicotine and cotinine both N-oxides and phendimetrazine-N-oxide (used as
Improved highly sensitive method for determination of nicotine and cotinine in human plasma by high-performance liquid chromatography.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
A highly sensitive and reliable method for the determination of nicotine and its metabolite cotinine in human plasma by high-performance liquid chromatography was developed. Nicotine and cotinine were extracted from alkalinized plasma with dichloromethane and the volatility of nicotine was prevented
[Detecting nicotine and its metabolite cotinine in human hair with capillary gas chromatography].
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
OBJECTIVE
To develop a rapid method for determination of nicotine and its metabolite cotinine in human hair with capillary gas chromatography with flame ionization detector.
METHODS
The hair sample was digested by 1.5 mol/L sodium hydroxide solution. The nicotine and cotinine in the hair sample were
Enantiomeric analysis of anatabine, nornicotine and anabasine in commercial tobacco by multi-dimensional gas chromatography and mass spectrometry.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
A fully automated multi-dimensional gas chromatography (MDGC) system with a megabore precolumn and cyclodextrin-based analytical column was developed to analyze the enantiomeric compositions of anatabine, nornicotine and anabasine in commercial tobacco. The enantiomer abundances of anatabine and
Analysis of residues of imidacloprid in tobacco by high-performance liquid chromatography with liquid-liquid partition cleanup.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
A practical method for analysis of residues of imidacloprid in baked tobacco leaves has been developed using HPLC with liquid-liquid partition clean-up. Imidacloprid was extracted with ethyl acetate under ultrasound, and cleaned up by liquid-liquid partition with 50 g litre(-1) aqueous sodium
[Determination of 29 pesticide residues in tobacco by gas chromatography-electron impact ionization mass spectrometry].
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
A method was developed for rapid determination of 29 pesticide residues in tobacco based on gas chromatography coupled with electron impact ionization mass spectrometric detection (GC-EI/MS). After the optimization of different parameters, such as the extraction solvent, elution solvent, purificant,
[Analysis of volatile and semi-volatile compounds in tobacco using off-line combination of liquid chromatography and capillary gas chromatography-mass spectrometry].
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
A method of off-line combination of liquid chromatography and capillary gas chromatography-mass spectrometry (LC-CGC/MS) was established for the analysis of volatile and semi-volatile compounds in tobacco. The separation mechanism of volatile and semi-volatile compounds was studied. An LC column of
Determination of nicotine and cotinine in rat plasma by liquid chromatography-tandem mass spectrometry.
Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
A method was developed for the efficient determination of nicotine and cotinine in rat plasma samples originating from nicotine exposure studies. Nicotine and cotinine were extracted from plasma samples with dichloromethane and concentrated to minimum volume with nitrogen stream. The volatility of
La base de dades d’herbes medicinals més completa avalada per la ciència
- Funciona en 55 idiomes
- Cures a base d'herbes recolzades per la ciència
- Reconeixement d’herbes per imatge
- Mapa GPS interactiu: etiqueta les herbes a la ubicació (properament)
- Llegiu publicacions científiques relacionades amb la vostra cerca
- Cerqueu herbes medicinals pels seus efectes
- Organitzeu els vostres interessos i estigueu al dia de les novetats, els assajos clínics i les patents
Escriviu un símptoma o una malaltia i llegiu sobre herbes que us poden ajudar, escriviu una herba i vegeu malalties i símptomes contra els quals s’utilitza.
* Tota la informació es basa en investigacions científiques publicades
