Magazine et Edition

Volume 31 (2022): Edition 2 (July 2022)

Volume 31 (2022): Edition 1 (March 2022)

Volume 30 (2021): Edition 4 (November 2021)

Volume 30 (2021): Edition 3 (July 2021)

Volume 30 (2021): Edition 2 (May 2021)

Volume 30 (2021): Edition 1 (March 2021)

Volume 29 (2020): Edition 3 (December 2020)

Volume 29 (2020): Edition 2 (August 2020)

Volume 29 (2020): Edition 1 (April 2020)

Volume 28 (2019): Edition 7 (December 2019)

Volume 28 (2019): Edition 6 (August 2019)

Volume 28 (2019): Edition 5 (May 2019)

Volume 28 (2018): Edition 4 (December 2018)

Volume 28 (2018): Edition 3 (October 2018)

Volume 28 (2018): Edition 2 (August 2018)

Volume 28 (2018): Edition 1 (April 2018)

Volume 27 (2017): Edition 8 (December 2017)

Volume 27 (2017): Edition 7 (September 2017)

Volume 27 (2017): Edition 6 (April 2017)

Volume 27 (2017): Edition 5 (January 2017)

Volume 27 (2016): Edition 4 (October 2016)

Volume 27 (2016): Edition 3 (July 2016)

Volume 27 (2016): Edition 2 (April 2016)

Volume 27 (2016): Edition 1 (January 2016)

Volume 26 (2015): Edition 7 (September 2015)

Volume 26 (2015): Edition 6 (June 2015)

Volume 26 (2015): Edition 5 (March 2015)

Volume 26 (2014): Edition 4 (December 2014)

Volume 26 (2014): Edition 3 (September 2014)

Volume 26 (2014): Edition 2 (July 2014)

Volume 26 (2014): Edition 1 (April 2014)

Volume 25 (2013): Edition 8 (December 2013)

Volume 25 (2013): Edition 7 (September 2013)

Volume 25 (2013): Edition 6 (June 2013)

Volume 25 (2013): Edition 5 (March 2013)

Volume 25 (2012): Edition 4 (December 2012)

Volume 25 (2012): Edition 3 (August 2012)

Volume 25 (2012): Edition 2 (June 2012)

Volume 25 (2012): Edition 1 (February 2012)

Volume 24 (2011): Edition 6 (November 2011)

Volume 24 (2011): Edition 5 (May 2011)

Volume 24 (2011): Edition 4 (January 2011)

Volume 24 (2010): Edition 3 (November 2010)

Volume 24 (2010): Edition 2 (July 2010)

Volume 24 (2010): Edition 1 (April 2010)

Volume 23 (2009): Edition 6 (December 2009)

Volume 23 (2009): Edition 5 (September 2009)

Volume 23 (2009): Edition 4 (May 2009)

Volume 23 (2008): Edition 3 (December 2008)

Volume 23 (2008): Edition 2 (August 2008)

Volume 23 (2008): Edition 1 (April 2008)

Volume 22 (2007): Edition 5 (June 2007)

Volume 22 (2007): Edition 4 (January 2007)

Volume 22 (2006): Edition 3 (October 2006)

Volume 22 (2006): Edition 2 (July 2006)

Volume 22 (2006): Edition 1 (April 2006)

Volume 21 (2005): Edition 8 (December 2005)

Volume 21 (2005): Edition 7 (October 2005)

Volume 21 (2005): Edition 6 (July 2005)

Volume 21 (2005): Edition 5 (April 2005)

Volume 21 (2004): Edition 4 (December 2004)

Volume 21 (2004): Edition 3 (October 2004)

Volume 21 (2004): Edition 2 (July 2004)

Volume 21 (2004): Edition 1 (March 2004)

Volume 20 (2003): Edition 8 (December 2003)

Volume 20 (2003): Edition 7 (November 2003)

Volume 20 (2003): Edition 6 (July 2003)

Volume 20 (2003): Edition 5 (March 2003)

Volume 20 (2002): Edition 4 (December 2002)

Volume 20 (2002): Edition 3 (August 2002)

Volume 20 (2002): Edition 2 (June 2002)

Volume 20 (2002): Edition 1 (February 2002)

Volume 19 (2001): Edition 7 (October 2001)

Volume 19 (2001): Edition 6 (July 2001)

Volume 19 (2001): Edition 5 (April 2001)

Volume 19 (2001): Edition 4 (January 2001)

Volume 19 (2000): Edition 3 (October 2000)

Volume 19 (2000): Edition 2 (July 2000)

Volume 19 (2000): Edition 1 (April 2000)

Volume 18 (1999): Edition 6 (December 1999)

Volume 18 (1999): Edition 5 (July 1999)

Volume 18 (1999): Edition 4 (April 1999)

Volume 18 (1998): Edition 3 (December 1998)

Volume 18 (1998): Edition 2 (August 1998)

Volume 18 (1998): Edition 1 (April 1998)

Volume 17 (1997): Edition 3 (December 1997)

Volume 17 (1997): Edition 2 (September 1997)

Volume 17 (1996): Edition 1 (December 1996)

Volume 16 (1995): Edition 4 (November 1995)

Volume 16 (1995): Edition 3 (July 1995)

Volume 16 (1994): Edition 2 (June 1994)

Volume 16 (1994): Edition 1 (May 1994)

Volume 15 (1992): Edition 3 (November 1992)

Volume 15 (1992): Edition 2 (April 1992)

Volume 15 (1991): Edition 1 (August 1991)

Volume 14 (1990): Edition 6 (June 1990)

Volume 14 (1989): Edition 5 (October 1989)

Volume 14 (1989): Edition 4 (February 1989)

Volume 14 (1989): Edition 3 (January 1989)

Volume 14 (1988): Edition 2 (October 1988)

Volume 14 (1987): Edition 1 (December 1987)

Volume 13 (1986): Edition 5 (December 1986)

Volume 13 (1986): Edition 4 (August 1986)

Volume 13 (1986): Edition 3 (July 1986)

Volume 13 (1985): Edition 2 (December 1985)

Volume 13 (1985): Edition 1 (January 1985)

Volume 12 (1984): Edition 5 (November 1984)

Volume 12 (1984): Edition 4 (July 1984)

Volume 12 (1984): Edition 3 (February 1984)

Volume 12 (1983): Edition 2 (June 1983)

Volume 12 (1983): Edition 1 (February 1983)

Volume 11 (1982): Edition 5 (November 1982)

Volume 11 (1982): Edition 4 (August 1982)

Volume 11 (1982): Edition 3 (January 1982)

Volume 11 (1981): Edition 2 (September 1981)

Volume 11 (1981): Edition 1 (March 1981)

Volume 10 (1980): Edition 3 (October 1980)

Volume 10 (1980): Edition 2 (July 1980)

Volume 10 (1979): Edition 1 (December 1979)

Volume 9 (1978): Edition 5 (December 1978)

Volume 9 (1978): Edition 4 (July 1978)

Volume 9 (1977): Edition 3 (October 1977)

Volume 9 (1977): Edition 2 (June 1977)

Volume 9 (1977): Edition 1 (April 1977)

Volume 8 (1976): Edition 7 (October 1976)

Volume 8 (1976): Edition 6 (June 1976)

Volume 8 (1976): Edition 5 (March 1976)

Volume 8 (1975): Edition 4 (December 1975)

Volume 8 (1975): Edition 3 (August 1975)

Volume 8 (1975): Edition 2 (May 1975)

Volume 8 (1975): Edition 1 (January 1975)

Volume 7 (1974): Edition 5 (September 1974)

Volume 7 (1974): Edition 4 (April 1974)

Volume 7 (1973): Edition 3 (November 1973)

Volume 7 (1973): Edition 2 (June 1973)

Volume 7 (1973): Edition 1 (January 1973)

Volume 6 (1972): Edition 5 (October 1972)

Volume 6 (1972): Edition 4 (August 1972)

Volume 6 (1972): Edition 3 (March 1972)

Volume 6 (1971): Edition 2 (September 1971)

Volume 6 (1971): Edition 1 (July 1971)

Volume 5 (1970): Edition 6 (December 1970)

Volume 5 (1970): Edition 5 (November 1970)

Volume 5 (1970): Edition 4 (August 1970)

Volume 5 (1969): Edition 3 (December 1969)

Volume 5 (1969): Edition 2 (August 1969)

Volume 5 (1969): Edition 1 (June 1969)

Volume 4 (1968): Edition 7 (December 1968)

Volume 4 (1968): Edition 6 (November 1968)

Volume 4 (1968): Edition 5 (July 1968)

Volume 4 (1968): Edition 4 (May 1968)

Volume 4 (1968): Edition 3 (February 1968)

Volume 4 (1967): Edition 2 (October 1967)

Volume 4 (1967): Edition 1 (August 1967)

Volume 3 (1966): Edition 9 (December 1966)

Volume 3 (1966): Edition 8 (December 1966)

Volume 3 (1966): Edition 7 (November 1966)

Volume 3 (1966): Edition 6 (September 1966)

Volume 3 (1966): Edition 5 (May 1966)

Volume 3 (1965): Edition 4 (October 1965)

Volume 3 (1965): Edition 3 (August 1965)

Volume 3 (1965): Edition 2 (May 1965)

Volume 3 (1965): Edition 1 (April 1965)

Volume 2 (1964): Edition 7 (November 1964)

Volume 2 (1964): Edition 6 (October 1964)

Volume 2 (1964): Edition 5 (May 1964)

Volume 2 (1964): Edition 4 (February 1964)

Volume 2 (1963): Edition 3 (October 1963)

Volume 2 (1963): Edition 2 (June 1963)

Volume 2 (1963): Edition 1 (March 1963)

Volume 1 (1962): Edition 10 (December 1962)

Volume 1 (1962): Edition 9 (December 1962)

Volume 1 (1962): Edition 8 (November 1962)

Volume 1 (1962): Edition 7 (November 1962)

Volume 1 (1962): Edition 6 (July 1962)

Volume 1 (1962): Edition 5 (February 1962)

Volume 1 (1961): Edition 4 (November 1961)

Volume 1 (1961): Edition 3 (August 1961)

Volume 1 (1961): Edition 2 (May 1961)

Volume 1 (1961): Edition 1 (January 1961)

Détails du magazine
Format
Magazine
eISSN
2719-9509
Première publication
01 Jan 1992
Période de publication
4 fois par an
Langues
Anglais

Chercher

Volume 6 (1971): Edition 2 (September 1971)

Détails du magazine
Format
Magazine
eISSN
2719-9509
Première publication
01 Jan 1992
Période de publication
4 fois par an
Langues
Anglais

Chercher

7 Articles
Accès libre

The Determination of Thiodan and Thiodan Sulphate on Tobacco and in Smoke Condensate

Publié en ligne: 19 Jul 2014
Pages: 57 - 61

Résumé

Abstract

A gas chromatographic method was developed for the quantitative determination of a- and b-thiodan and thiodan sulphate on tobacco and in smoke condensate in concentrations as Iow as 0.01 parts per million. A survey was made of the thiodan and thiodan sulphate content of leaf tobacco and cigarettes. Thiodan and thiodan sulphate residues in leaf tobacco were found to amount to between 0.02 and 0.3 ppm and to between less than 0.02 and 0.05 ppm respectively. Cigarettes manufactured from Virginia tobacco were found to contain between 0.1 and 0.2 ppm of thiodan and less than 0.05 ppm of thiodan sulphate. The transfer rate of thiodan and thiodan sulphate from cigarette tobacco into the mainstream smoke ranged from 14.5 % to 16.3 %

Accès libre

The Statistical Investigation of Sorption Phenomena in Tobacco/Die mathematische Behandlung verschiedener Sorptionsgleichungen für Tabak

Publié en ligne: 19 Jul 2014
Pages: 62 - 69

Résumé

Abstract

Even to-day the theory of sorption phenomena does not provide for an exact analytical solution to the problem of the different types of binding existing between the liquid and gaseous phases and the material to be studied. Under these circumstances, the empirical relations between the equilibrium moisture content and the relative air humidity is of increasing significance. The validity of the mathematic principles of the Theory BET and of the Equation of Henderson is examined by comparison with experimental results obtained for tobacco. The limits set to determination reveal themselves even in the sphere of adsorption, if the calculation of the Theory BET is made on the basis of five molecular layers. Finally, the sorption theory which has recently been established by Kollmann and which is based on statistical investigations is presented. The author intends to apply Kollmann's theory to tobacco and will report the results at a later date

Accès libre

The Identification of Maltol in Cigarette Smoke/Nachweis von Maltol in Cigarettenrauch

Publié en ligne: 19 Jul 2014
Pages: 70 - 73

Résumé

Abstract

Maltol (2-hydroxy-3-methyl-4-pyrone) as a new tobacco smoke constituent was identified by thin layer chromatography and UV-spectrometry. After conversion into the methylether, by reaction with diazomethane, maltoI was identified by gas chromatography and mass spectrometry. The amount of maltol in the smoke of a cigarette, made from tobacco without any additives, was 5 to 10 µg/cigarette. As far as we know, the occurrence of γ-pyrone derivatives in tobacco smoke has not been reported until now. It might be possible that the newly found γ-pyrone derivative is only the first representative of a new class of chemical smoke constituents

Accès libre

The Determination of Formaldehyde in Cigarette Smoke

Publié en ligne: 19 Jul 2014
Pages: 74 - 78

Résumé

Abstract

A specific, sensitive method for the determination of formaldehyde in cigarette smoke is described employing the spectrophotometric detection of the product formed by reaction of formaldehyde with p-rosaniline and sulphur dioxide. The procedure is applicable to the analysis of smoke from cigarettes manufactured from flue-cured, Burley and fermented tobaccos. Smoking parameters and the use of Cambridge filters have been found to affect delivery markedly. The effect of several commercial filters on formaldehyde delivery has been examined.

Accès libre

Gas-Chromatographic Determination of the Trimethylsilyl Derivatives of Polyhydric Alcohol Humectants in Tobacco and in Tobacco Smoke

Publié en ligne: 19 Jul 2014
Pages: 79 - 83

Résumé

Abstract

A qualitative and quantitative procedure has been developed for the determination of humectants in manufactured tobacco by gas-chromatographic method with a flame ionization detector. It consists of extraction with methanol, concentration of the extract and treatment with Tri-Sil reagents. The operating gas-chromatographic conditions are set forth. Samples of tobacco containing glycerine, propylene glycol, diethylene glycol, triethylene glycol, 1-3 butylene glycol and sorbitol have been analysed with recoveries, for the first five ones, in the range of 95-104 %. In order to verify that each chromatographic peak corresponded to the relative glycol, with no interference by other silylated compounds, the mass spectra were obtained through the combination of gas-chromatography with mass spectrometry. The results achieved confirm, as far as tobacco is concerned, that the procedure is accurate and precise. The same method for the determination of humectants was extended to cigarette smoke. Even though this involves morecomplicated problems, as compared to tobacco, because of the presence of silylated compounds, it was found that, for certain glycols, the gas-chromatography of the trimethyl derivatives can be also used as a method of analysis. The mass spectra of some polyhydric alcohols are shown

Accès libre

Analytical Examination of Gas Phase Condensate of Cigarette Smoke - Analytische Untersuchungen an Gasphasenkondensat

Publié en ligne: 19 Jul 2014
Pages: 84 - 88

Résumé

Abstract

By the use of gaschromatographic and mass spectrometric methods gas phase condensate from cigarette smoke, isolated on a preparative scale, has been compared with the native gas phase from the smoke of the same cigarettes and investigated for qualitative composition. With regard to composition, there is a satisfactory conformity between both mixtures of substances. It has been possible to identify or to characterize more than 60 constituents

Accès libre

Automatic Dropping-Applicator for Epicutaneous Tests with Mice in Combination with a Capillary Press - Applikationsautomatik für Epikutanversuche an Mäusen als Zusatzgerät zur Seehofer'schen Kapillarpresse

Publié en ligne: 19 Jul 2014
Pages: 89 - 91

Résumé

Abstract

An automatic dropping-applicator for fresh cigarette smoke condensate is described. The new applicator makes it possible to apply separately a solvent and the smoke condensate produced by a capillary press. 15 animals can be treated simultaneously

7 Articles
Accès libre

The Determination of Thiodan and Thiodan Sulphate on Tobacco and in Smoke Condensate

Publié en ligne: 19 Jul 2014
Pages: 57 - 61

Résumé

Abstract

A gas chromatographic method was developed for the quantitative determination of a- and b-thiodan and thiodan sulphate on tobacco and in smoke condensate in concentrations as Iow as 0.01 parts per million. A survey was made of the thiodan and thiodan sulphate content of leaf tobacco and cigarettes. Thiodan and thiodan sulphate residues in leaf tobacco were found to amount to between 0.02 and 0.3 ppm and to between less than 0.02 and 0.05 ppm respectively. Cigarettes manufactured from Virginia tobacco were found to contain between 0.1 and 0.2 ppm of thiodan and less than 0.05 ppm of thiodan sulphate. The transfer rate of thiodan and thiodan sulphate from cigarette tobacco into the mainstream smoke ranged from 14.5 % to 16.3 %

Accès libre

The Statistical Investigation of Sorption Phenomena in Tobacco/Die mathematische Behandlung verschiedener Sorptionsgleichungen für Tabak

Publié en ligne: 19 Jul 2014
Pages: 62 - 69

Résumé

Abstract

Even to-day the theory of sorption phenomena does not provide for an exact analytical solution to the problem of the different types of binding existing between the liquid and gaseous phases and the material to be studied. Under these circumstances, the empirical relations between the equilibrium moisture content and the relative air humidity is of increasing significance. The validity of the mathematic principles of the Theory BET and of the Equation of Henderson is examined by comparison with experimental results obtained for tobacco. The limits set to determination reveal themselves even in the sphere of adsorption, if the calculation of the Theory BET is made on the basis of five molecular layers. Finally, the sorption theory which has recently been established by Kollmann and which is based on statistical investigations is presented. The author intends to apply Kollmann's theory to tobacco and will report the results at a later date

Accès libre

The Identification of Maltol in Cigarette Smoke/Nachweis von Maltol in Cigarettenrauch

Publié en ligne: 19 Jul 2014
Pages: 70 - 73

Résumé

Abstract

Maltol (2-hydroxy-3-methyl-4-pyrone) as a new tobacco smoke constituent was identified by thin layer chromatography and UV-spectrometry. After conversion into the methylether, by reaction with diazomethane, maltoI was identified by gas chromatography and mass spectrometry. The amount of maltol in the smoke of a cigarette, made from tobacco without any additives, was 5 to 10 µg/cigarette. As far as we know, the occurrence of γ-pyrone derivatives in tobacco smoke has not been reported until now. It might be possible that the newly found γ-pyrone derivative is only the first representative of a new class of chemical smoke constituents

Accès libre

The Determination of Formaldehyde in Cigarette Smoke

Publié en ligne: 19 Jul 2014
Pages: 74 - 78

Résumé

Abstract

A specific, sensitive method for the determination of formaldehyde in cigarette smoke is described employing the spectrophotometric detection of the product formed by reaction of formaldehyde with p-rosaniline and sulphur dioxide. The procedure is applicable to the analysis of smoke from cigarettes manufactured from flue-cured, Burley and fermented tobaccos. Smoking parameters and the use of Cambridge filters have been found to affect delivery markedly. The effect of several commercial filters on formaldehyde delivery has been examined.

Accès libre

Gas-Chromatographic Determination of the Trimethylsilyl Derivatives of Polyhydric Alcohol Humectants in Tobacco and in Tobacco Smoke

Publié en ligne: 19 Jul 2014
Pages: 79 - 83

Résumé

Abstract

A qualitative and quantitative procedure has been developed for the determination of humectants in manufactured tobacco by gas-chromatographic method with a flame ionization detector. It consists of extraction with methanol, concentration of the extract and treatment with Tri-Sil reagents. The operating gas-chromatographic conditions are set forth. Samples of tobacco containing glycerine, propylene glycol, diethylene glycol, triethylene glycol, 1-3 butylene glycol and sorbitol have been analysed with recoveries, for the first five ones, in the range of 95-104 %. In order to verify that each chromatographic peak corresponded to the relative glycol, with no interference by other silylated compounds, the mass spectra were obtained through the combination of gas-chromatography with mass spectrometry. The results achieved confirm, as far as tobacco is concerned, that the procedure is accurate and precise. The same method for the determination of humectants was extended to cigarette smoke. Even though this involves morecomplicated problems, as compared to tobacco, because of the presence of silylated compounds, it was found that, for certain glycols, the gas-chromatography of the trimethyl derivatives can be also used as a method of analysis. The mass spectra of some polyhydric alcohols are shown

Accès libre

Analytical Examination of Gas Phase Condensate of Cigarette Smoke - Analytische Untersuchungen an Gasphasenkondensat

Publié en ligne: 19 Jul 2014
Pages: 84 - 88

Résumé

Abstract

By the use of gaschromatographic and mass spectrometric methods gas phase condensate from cigarette smoke, isolated on a preparative scale, has been compared with the native gas phase from the smoke of the same cigarettes and investigated for qualitative composition. With regard to composition, there is a satisfactory conformity between both mixtures of substances. It has been possible to identify or to characterize more than 60 constituents

Accès libre

Automatic Dropping-Applicator for Epicutaneous Tests with Mice in Combination with a Capillary Press - Applikationsautomatik für Epikutanversuche an Mäusen als Zusatzgerät zur Seehofer'schen Kapillarpresse

Publié en ligne: 19 Jul 2014
Pages: 89 - 91

Résumé

Abstract

An automatic dropping-applicator for fresh cigarette smoke condensate is described. The new applicator makes it possible to apply separately a solvent and the smoke condensate produced by a capillary press. 15 animals can be treated simultaneously

Planifiez votre conférence à distance avec Sciendo