Zeitschriften und Ausgaben

Volumen 31 (2022): Heft 2 (July 2022)

Volumen 31 (2022): Heft 1 (March 2022)

Volumen 30 (2021): Heft 4 (November 2021)

Volumen 30 (2021): Heft 3 (July 2021)

Volumen 30 (2021): Heft 2 (May 2021)

Volumen 30 (2021): Heft 1 (March 2021)

Volumen 29 (2020): Heft 3 (December 2020)

Volumen 29 (2020): Heft 2 (August 2020)

Volumen 29 (2020): Heft 1 (April 2020)

Volumen 28 (2019): Heft 7 (December 2019)

Volumen 28 (2019): Heft 6 (August 2019)

Volumen 28 (2019): Heft 5 (May 2019)

Volumen 28 (2018): Heft 4 (December 2018)

Volumen 28 (2018): Heft 3 (October 2018)

Volumen 28 (2018): Heft 2 (August 2018)

Volumen 28 (2018): Heft 1 (April 2018)

Volumen 27 (2017): Heft 8 (December 2017)

Volumen 27 (2017): Heft 7 (September 2017)

Volumen 27 (2017): Heft 6 (April 2017)

Volumen 27 (2017): Heft 5 (January 2017)

Volumen 27 (2016): Heft 4 (October 2016)

Volumen 27 (2016): Heft 3 (July 2016)

Volumen 27 (2016): Heft 2 (April 2016)

Volumen 27 (2016): Heft 1 (January 2016)

Volumen 26 (2015): Heft 7 (September 2015)

Volumen 26 (2015): Heft 6 (June 2015)

Volumen 26 (2015): Heft 5 (March 2015)

Volumen 26 (2014): Heft 4 (December 2014)

Volumen 26 (2014): Heft 3 (September 2014)

Volumen 26 (2014): Heft 2 (July 2014)

Volumen 26 (2014): Heft 1 (April 2014)

Volumen 25 (2013): Heft 8 (December 2013)

Volumen 25 (2013): Heft 7 (September 2013)

Volumen 25 (2013): Heft 6 (June 2013)

Volumen 25 (2013): Heft 5 (March 2013)

Volumen 25 (2012): Heft 4 (December 2012)

Volumen 25 (2012): Heft 3 (August 2012)

Volumen 25 (2012): Heft 2 (June 2012)

Volumen 25 (2012): Heft 1 (February 2012)

Volumen 24 (2011): Heft 6 (November 2011)

Volumen 24 (2011): Heft 5 (May 2011)

Volumen 24 (2011): Heft 4 (January 2011)

Volumen 24 (2010): Heft 3 (November 2010)

Volumen 24 (2010): Heft 2 (July 2010)

Volumen 24 (2010): Heft 1 (April 2010)

Volumen 23 (2009): Heft 6 (December 2009)

Volumen 23 (2009): Heft 5 (September 2009)

Volumen 23 (2009): Heft 4 (May 2009)

Volumen 23 (2008): Heft 3 (December 2008)

Volumen 23 (2008): Heft 2 (August 2008)

Volumen 23 (2008): Heft 1 (April 2008)

Volumen 22 (2007): Heft 5 (June 2007)

Volumen 22 (2007): Heft 4 (January 2007)

Volumen 22 (2006): Heft 3 (October 2006)

Volumen 22 (2006): Heft 2 (July 2006)

Volumen 22 (2006): Heft 1 (April 2006)

Volumen 21 (2005): Heft 8 (December 2005)

Volumen 21 (2005): Heft 7 (October 2005)

Volumen 21 (2005): Heft 6 (July 2005)

Volumen 21 (2005): Heft 5 (April 2005)

Volumen 21 (2004): Heft 4 (December 2004)

Volumen 21 (2004): Heft 3 (October 2004)

Volumen 21 (2004): Heft 2 (July 2004)

Volumen 21 (2004): Heft 1 (March 2004)

Volumen 20 (2003): Heft 8 (December 2003)

Volumen 20 (2003): Heft 7 (November 2003)

Volumen 20 (2003): Heft 6 (July 2003)

Volumen 20 (2003): Heft 5 (March 2003)

Volumen 20 (2002): Heft 4 (December 2002)

Volumen 20 (2002): Heft 3 (August 2002)

Volumen 20 (2002): Heft 2 (June 2002)

Volumen 20 (2002): Heft 1 (February 2002)

Volumen 19 (2001): Heft 7 (October 2001)

Volumen 19 (2001): Heft 6 (July 2001)

Volumen 19 (2001): Heft 5 (April 2001)

Volumen 19 (2001): Heft 4 (January 2001)

Volumen 19 (2000): Heft 3 (October 2000)

Volumen 19 (2000): Heft 2 (July 2000)

Volumen 19 (2000): Heft 1 (April 2000)

Volumen 18 (1999): Heft 6 (December 1999)

Volumen 18 (1999): Heft 5 (July 1999)

Volumen 18 (1999): Heft 4 (April 1999)

Volumen 18 (1998): Heft 3 (December 1998)

Volumen 18 (1998): Heft 2 (August 1998)

Volumen 18 (1998): Heft 1 (April 1998)

Volumen 17 (1997): Heft 3 (December 1997)

Volumen 17 (1997): Heft 2 (September 1997)

Volumen 17 (1996): Heft 1 (December 1996)

Volumen 16 (1995): Heft 4 (November 1995)

Volumen 16 (1995): Heft 3 (July 1995)

Volumen 16 (1994): Heft 2 (June 1994)

Volumen 16 (1994): Heft 1 (May 1994)

Volumen 15 (1992): Heft 3 (November 1992)

Volumen 15 (1992): Heft 2 (April 1992)

Volumen 15 (1991): Heft 1 (August 1991)

Volumen 14 (1990): Heft 6 (June 1990)

Volumen 14 (1989): Heft 5 (October 1989)

Volumen 14 (1989): Heft 4 (February 1989)

Volumen 14 (1989): Heft 3 (January 1989)

Volumen 14 (1988): Heft 2 (October 1988)

Volumen 14 (1987): Heft 1 (December 1987)

Volumen 13 (1986): Heft 5 (December 1986)

Volumen 13 (1986): Heft 4 (August 1986)

Volumen 13 (1986): Heft 3 (July 1986)

Volumen 13 (1985): Heft 2 (December 1985)

Volumen 13 (1985): Heft 1 (January 1985)

Volumen 12 (1984): Heft 5 (November 1984)

Volumen 12 (1984): Heft 4 (July 1984)

Volumen 12 (1984): Heft 3 (February 1984)

Volumen 12 (1983): Heft 2 (June 1983)

Volumen 12 (1983): Heft 1 (February 1983)

Volumen 11 (1982): Heft 5 (November 1982)

Volumen 11 (1982): Heft 4 (August 1982)

Volumen 11 (1982): Heft 3 (January 1982)

Volumen 11 (1981): Heft 2 (September 1981)

Volumen 11 (1981): Heft 1 (March 1981)

Volumen 10 (1980): Heft 3 (October 1980)

Volumen 10 (1980): Heft 2 (July 1980)

Volumen 10 (1979): Heft 1 (December 1979)

Volumen 9 (1978): Heft 5 (December 1978)

Volumen 9 (1978): Heft 4 (July 1978)

Volumen 9 (1977): Heft 3 (October 1977)

Volumen 9 (1977): Heft 2 (June 1977)

Volumen 9 (1977): Heft 1 (April 1977)

Volumen 8 (1976): Heft 7 (October 1976)

Volumen 8 (1976): Heft 6 (June 1976)

Volumen 8 (1976): Heft 5 (March 1976)

Volumen 8 (1975): Heft 4 (December 1975)

Volumen 8 (1975): Heft 3 (August 1975)

Volumen 8 (1975): Heft 2 (May 1975)

Volumen 8 (1975): Heft 1 (January 1975)

Volumen 7 (1974): Heft 5 (September 1974)

Volumen 7 (1974): Heft 4 (April 1974)

Volumen 7 (1973): Heft 3 (November 1973)

Volumen 7 (1973): Heft 2 (June 1973)

Volumen 7 (1973): Heft 1 (January 1973)

Volumen 6 (1972): Heft 5 (October 1972)

Volumen 6 (1972): Heft 4 (August 1972)

Volumen 6 (1972): Heft 3 (March 1972)

Volumen 6 (1971): Heft 2 (September 1971)

Volumen 6 (1971): Heft 1 (July 1971)

Volumen 5 (1970): Heft 6 (December 1970)

Volumen 5 (1970): Heft 5 (November 1970)

Volumen 5 (1970): Heft 4 (August 1970)

Volumen 5 (1969): Heft 3 (December 1969)

Volumen 5 (1969): Heft 2 (August 1969)

Volumen 5 (1969): Heft 1 (June 1969)

Volumen 4 (1968): Heft 7 (December 1968)

Volumen 4 (1968): Heft 6 (November 1968)

Volumen 4 (1968): Heft 5 (July 1968)

Volumen 4 (1968): Heft 4 (May 1968)

Volumen 4 (1968): Heft 3 (February 1968)

Volumen 4 (1967): Heft 2 (October 1967)

Volumen 4 (1967): Heft 1 (August 1967)

Volumen 3 (1966): Heft 9 (December 1966)

Volumen 3 (1966): Heft 8 (December 1966)

Volumen 3 (1966): Heft 7 (November 1966)

Volumen 3 (1966): Heft 6 (September 1966)

Volumen 3 (1966): Heft 5 (May 1966)

Volumen 3 (1965): Heft 4 (October 1965)

Volumen 3 (1965): Heft 3 (August 1965)

Volumen 3 (1965): Heft 2 (May 1965)

Volumen 3 (1965): Heft 1 (April 1965)

Volumen 2 (1964): Heft 7 (November 1964)

Volumen 2 (1964): Heft 6 (October 1964)

Volumen 2 (1964): Heft 5 (May 1964)

Volumen 2 (1964): Heft 4 (February 1964)

Volumen 2 (1963): Heft 3 (October 1963)

Volumen 2 (1963): Heft 2 (June 1963)

Volumen 2 (1963): Heft 1 (March 1963)

Volumen 1 (1962): Heft 10 (December 1962)

Volumen 1 (1962): Heft 9 (December 1962)

Volumen 1 (1962): Heft 8 (November 1962)

Volumen 1 (1962): Heft 7 (November 1962)

Volumen 1 (1962): Heft 6 (July 1962)

Volumen 1 (1962): Heft 5 (February 1962)

Volumen 1 (1961): Heft 4 (November 1961)

Volumen 1 (1961): Heft 3 (August 1961)

Volumen 1 (1961): Heft 2 (May 1961)

Volumen 1 (1961): Heft 1 (January 1961)

Zeitschriftendaten
Format
Zeitschrift
eISSN
2719-9509
Erstveröffentlichung
01 Jan 1992
Erscheinungsweise
4 Hefte pro Jahr
Sprachen
Englisch

Suche

Volumen 2 (1964): Heft 6 (October 1964)

Zeitschriftendaten
Format
Zeitschrift
eISSN
2719-9509
Erstveröffentlichung
01 Jan 1992
Erscheinungsweise
4 Hefte pro Jahr
Sprachen
Englisch

Suche

6 Artikel
Uneingeschränkter Zugang

Smoking and Redistillation Effect in Theory and Experiments / Verrauchung und Redestillation in Theorie und Versuchen

Online veröffentlicht: 28 May 2014
Seitenbereich: 237 - 262

Zusammenfassung

Abstract

Three experiments are described to learn, if there is any redistillation effect or not. These experiments established that this is true.

Then a short introduction is given of adsorption laws with regard to tobacco aerosol sucked through a filter, i. e. through tobacco in the butt.

In the following the smoking process is investigated. Beginning we assume for simplicity the case of no redistillation (R = 0):

•mI denotes the aerosol mass precipitated on the tobacco in the butt and which is destroyed by the advancing smouldering zone in section I, i. e. in the ash.

•mII denotes the aerosol mass precipitated in section II, i. e. in the butt.

•mIII denotes the aerosol mass leaving the cigarette.

Tobacco aerosol distribution in section I and II and mass of mIII are given as a function of the smouldering zone's progress. The tables are calculated using the adsorption constant k = 0.0689, this being found for a particular brand of cigarette by experiment.

Then we investigate the other extreme, i. e. the total redistillation (R = 1). An additional mass of volatile tobacco aerosol is generated in the smouldering zone, not through combustion of the tobacco but through redistillation of the precipitated aerosol. Results are obtained by integration and also by an algebraic method using a calculating machine.

Finally further tables are given for partial redistillation effect (R = 0.25; 0.50; 0.75). The experimental part demonstrates that for the special cigarette brand investigated it is found

R = 0.45 for tobacco aerosol and R = 0.72 for phenols.

R = 0.45 means: The aerosol precipitated during smoking on the butt's tobacco by the advancing smouldering zone is partly destroyed (55 %) and partly redistilled (45 %).

Uneingeschränkter Zugang

The Effect of Cigarette Filters on the Gas Phase Components. Examination of the Smoke Yields of each Puff of a Cigarette / Die Wirkung von Cigarettenfiltern auf die Bestandteile der Dampfphase: Untersuchungen des Rauches von verschiedenen aufeinanderfolgenden Zügen einer Cigarette

Online veröffentlicht: 28 May 2014
Seitenbereich: 263 - 269

Zusammenfassung

Abstract

An analytical procedure for examining the components of the gas phase of each puff of a cigarette is described. The compounds in question have to be quantitatively detectable by gas chromatography. The relative acetaldehyde retention of four different cigarette filters is determined

Uneingeschränkter Zugang

The Influence of Air Permeability of Cigarette Paper on the Yield of Condensate and its Composition / Einfluss der Luftdurchlässigkeit von Cigarettenpapier auf die Ausbeute und Zusammensetzung des Rauches

Online veröffentlicht: 28 May 2014
Seitenbereich: 271 - 281

Zusammenfassung

Abstract

The influence of air permeability of cigarette paper on the yield of condensate and on its composition was examined. Total particulate matter and nicotine in the smoke decrease with increasing permeability of the paper. The decrease results from the smaller quantity of tobacco burnt in the mainstream. Higher combustion cannot be obtained by paper of greater permeability. The content of condensate of 3,4-benzopyrene is constant. Total particulate matter and nicotine in the smoke - measured in per cent of the tobacco smoked in the mainstream - are also constant.

Uneingeschränkter Zugang

The Determination of Pyridin in Tobacco Smoke during a Routine Determination of Smoke Alkaloids / Zur Bestimmung des Pyridins im Rauch von Cigaretten im Rahmen der Bestimmung der Gesamtalkaloide

Online veröffentlicht: 28 May 2014
Seitenbereich: 282 - 293

Zusammenfassung

Abstract

Asmus et al. have published an analytical procedure for the quantitative separate determination of nicotine and pyridine in tobacco smoke. Their method has been slightly modified in order to adapt it to the standard procedure of smoke alkaloid analysis. The modified method allows the accurate determination of the nicotine alkaloids and the pyridines; the latter can be assayed with a precision of ± 0.7 µg per cigarette, for a total of 21 µg pyridine per cigarette (95 % confidence limits). Preliminary results using this method indicate that the mainstream smoke of one cigarette contains between about 20 (sun-cured and flue-cured tobaccos) and 50 (air-cured tobaccos) µg of pyridine. The stub of a straight cigarette shows a marked retention efficiency for smoke pyridine; still better retention is observed through a cigarette filter from cellulose acetate, whereas filters on a paper or cellulose basis are less efficient. It is usual to separate the pyridines from the other smoke bases by steam distillation in presence of acetic acid or a buffer solution. It is shown that this procedure is inefficient. The simple pyridines contributing rarely more than 2 percent to the mass of the total smoke bases, there seems to be no real necessity of determining their amount in the course of a routine determination of the smoke alkaloids.

Uneingeschränkter Zugang

Analysis of an Ultra-Violet Colourimeter Developed by B. Lange for the Measurement of Nicotine in Tobacco Smoke Condensate / Über die Eignung des UV-Kolorimeters nach B. Lange zur Bestimmung des Nikotins im Tabakrauchkondensat

Online veröffentlicht: 28 May 2014
Seitenbereich: 294 - 301

Zusammenfassung

Abstract

The measurement of nicotine solutions by means of an ultra-violet colorimeter prerequisites a special procedure because of the solutions being chemically changed during the measuring process already by the low pressure ultra-violet lamp situated beside the cell. The „Einheitliche Vorschriften für die Analyse von Tabak und Tabakrauch“ (prescriptions for the analysis of tobacco and tobacco smoke) being followed until the preparation of the solutions, the verification of the accuracy of the method can be limited to the control of the reproducibility of reading. The results obtained by the procedure in question are compared to those resulting from the silicotungstic method. The experiments indicate that the method is sufficiently accurate for the determination of nicotine in tobacco smoke condensates.

Uneingeschränkter Zugang

The Capillary Press, a Smoking Machine for the Collection of Native Smoke Condensate: 1st Report / Die Kapillarpresse, eine Rauchmaschine zur Gewinnung von nativem Rauchkondensat: 1. Mitteilung

Online veröffentlicht: 28 May 2014
Seitenbereich: 303 - 310

Zusammenfassung

Abstract

A piston smoking machine is described in which the smoke is precipitated by coagulation in a capillary. The apparatus maintains a constant puff volume, can be adapted to any smoking condition, and is suitable for the successive smoking of a great number of cigarettes.

6 Artikel
Uneingeschränkter Zugang

Smoking and Redistillation Effect in Theory and Experiments / Verrauchung und Redestillation in Theorie und Versuchen

Online veröffentlicht: 28 May 2014
Seitenbereich: 237 - 262

Zusammenfassung

Abstract

Three experiments are described to learn, if there is any redistillation effect or not. These experiments established that this is true.

Then a short introduction is given of adsorption laws with regard to tobacco aerosol sucked through a filter, i. e. through tobacco in the butt.

In the following the smoking process is investigated. Beginning we assume for simplicity the case of no redistillation (R = 0):

•mI denotes the aerosol mass precipitated on the tobacco in the butt and which is destroyed by the advancing smouldering zone in section I, i. e. in the ash.

•mII denotes the aerosol mass precipitated in section II, i. e. in the butt.

•mIII denotes the aerosol mass leaving the cigarette.

Tobacco aerosol distribution in section I and II and mass of mIII are given as a function of the smouldering zone's progress. The tables are calculated using the adsorption constant k = 0.0689, this being found for a particular brand of cigarette by experiment.

Then we investigate the other extreme, i. e. the total redistillation (R = 1). An additional mass of volatile tobacco aerosol is generated in the smouldering zone, not through combustion of the tobacco but through redistillation of the precipitated aerosol. Results are obtained by integration and also by an algebraic method using a calculating machine.

Finally further tables are given for partial redistillation effect (R = 0.25; 0.50; 0.75). The experimental part demonstrates that for the special cigarette brand investigated it is found

R = 0.45 for tobacco aerosol and R = 0.72 for phenols.

R = 0.45 means: The aerosol precipitated during smoking on the butt's tobacco by the advancing smouldering zone is partly destroyed (55 %) and partly redistilled (45 %).

Uneingeschränkter Zugang

The Effect of Cigarette Filters on the Gas Phase Components. Examination of the Smoke Yields of each Puff of a Cigarette / Die Wirkung von Cigarettenfiltern auf die Bestandteile der Dampfphase: Untersuchungen des Rauches von verschiedenen aufeinanderfolgenden Zügen einer Cigarette

Online veröffentlicht: 28 May 2014
Seitenbereich: 263 - 269

Zusammenfassung

Abstract

An analytical procedure for examining the components of the gas phase of each puff of a cigarette is described. The compounds in question have to be quantitatively detectable by gas chromatography. The relative acetaldehyde retention of four different cigarette filters is determined

Uneingeschränkter Zugang

The Influence of Air Permeability of Cigarette Paper on the Yield of Condensate and its Composition / Einfluss der Luftdurchlässigkeit von Cigarettenpapier auf die Ausbeute und Zusammensetzung des Rauches

Online veröffentlicht: 28 May 2014
Seitenbereich: 271 - 281

Zusammenfassung

Abstract

The influence of air permeability of cigarette paper on the yield of condensate and on its composition was examined. Total particulate matter and nicotine in the smoke decrease with increasing permeability of the paper. The decrease results from the smaller quantity of tobacco burnt in the mainstream. Higher combustion cannot be obtained by paper of greater permeability. The content of condensate of 3,4-benzopyrene is constant. Total particulate matter and nicotine in the smoke - measured in per cent of the tobacco smoked in the mainstream - are also constant.

Uneingeschränkter Zugang

The Determination of Pyridin in Tobacco Smoke during a Routine Determination of Smoke Alkaloids / Zur Bestimmung des Pyridins im Rauch von Cigaretten im Rahmen der Bestimmung der Gesamtalkaloide

Online veröffentlicht: 28 May 2014
Seitenbereich: 282 - 293

Zusammenfassung

Abstract

Asmus et al. have published an analytical procedure for the quantitative separate determination of nicotine and pyridine in tobacco smoke. Their method has been slightly modified in order to adapt it to the standard procedure of smoke alkaloid analysis. The modified method allows the accurate determination of the nicotine alkaloids and the pyridines; the latter can be assayed with a precision of ± 0.7 µg per cigarette, for a total of 21 µg pyridine per cigarette (95 % confidence limits). Preliminary results using this method indicate that the mainstream smoke of one cigarette contains between about 20 (sun-cured and flue-cured tobaccos) and 50 (air-cured tobaccos) µg of pyridine. The stub of a straight cigarette shows a marked retention efficiency for smoke pyridine; still better retention is observed through a cigarette filter from cellulose acetate, whereas filters on a paper or cellulose basis are less efficient. It is usual to separate the pyridines from the other smoke bases by steam distillation in presence of acetic acid or a buffer solution. It is shown that this procedure is inefficient. The simple pyridines contributing rarely more than 2 percent to the mass of the total smoke bases, there seems to be no real necessity of determining their amount in the course of a routine determination of the smoke alkaloids.

Uneingeschränkter Zugang

Analysis of an Ultra-Violet Colourimeter Developed by B. Lange for the Measurement of Nicotine in Tobacco Smoke Condensate / Über die Eignung des UV-Kolorimeters nach B. Lange zur Bestimmung des Nikotins im Tabakrauchkondensat

Online veröffentlicht: 28 May 2014
Seitenbereich: 294 - 301

Zusammenfassung

Abstract

The measurement of nicotine solutions by means of an ultra-violet colorimeter prerequisites a special procedure because of the solutions being chemically changed during the measuring process already by the low pressure ultra-violet lamp situated beside the cell. The „Einheitliche Vorschriften für die Analyse von Tabak und Tabakrauch“ (prescriptions for the analysis of tobacco and tobacco smoke) being followed until the preparation of the solutions, the verification of the accuracy of the method can be limited to the control of the reproducibility of reading. The results obtained by the procedure in question are compared to those resulting from the silicotungstic method. The experiments indicate that the method is sufficiently accurate for the determination of nicotine in tobacco smoke condensates.

Uneingeschränkter Zugang

The Capillary Press, a Smoking Machine for the Collection of Native Smoke Condensate: 1st Report / Die Kapillarpresse, eine Rauchmaschine zur Gewinnung von nativem Rauchkondensat: 1. Mitteilung

Online veröffentlicht: 28 May 2014
Seitenbereich: 303 - 310

Zusammenfassung

Abstract

A piston smoking machine is described in which the smoke is precipitated by coagulation in a capillary. The apparatus maintains a constant puff volume, can be adapted to any smoking condition, and is suitable for the successive smoking of a great number of cigarettes.

Planen Sie Ihre Fernkonferenz mit Scienceendo