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

Chercher

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

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

Chercher

8 Articles
Accès libre

Fundamental Reflections on the Chemical Composition of Tobacco Smoke and its Reactivity Products / Grundsätzliche Überlegungen zur chemischen Zusammensetzung des Tabakrauches und seiner Abscheidungsprodukte

Publié en ligne: 28 May 2014
Pages: 155 - 164

Résumé

Abstract

For the estimation of the different methods used for obtaining and fractioning tobacco tars, it is necessary to consider the reactivity of the For the estimation of the different methods used for obtaining and fractioning tobacco tars, it is necessary to consider the reactivity of the individual components and the characteristic action of the entire product. For analytical and biological tests a product is required which has not undergone any important chemical or biochemical changes. It is shown that this important condition has mostly been neglected. The changes likely to occur in the tar during the different smoking and preparation procedures are discussed. It is pointed out that a great number of compounds have been described, in particular in the more recent literature, which are eager to react with other substances and which, being constituents of tobacco smoke, might be responsible for such chemical changes.Several tars were submitted to a limited ageing under different physical conditions. Such simple tests demonstrate the important changes taking place in the original tar when submitted to temperature, light and air and if concentrations in the solvent are too high. On the basis of such general reflections it is concluded that the biological tests described until now require reexamination and that it is necessary to develop and apply such procedures, both for the production and the preparation of tobacco tars, which prevent the formation of artefacts

Accès libre

A New Apparatus for the Collection of Tobacco Smoke for Producing Native Tobacco Tar / Eine neue maschinelle Abrauch- und Rauchabscheidungsapparatur zur Gewinnung von „nativem“ Tabakteer

Publié en ligne: 28 May 2014
Pages: 165 - 169

Résumé

Accès libre

Microphotography of Histology and Anatomy of Tobacco / Mikroaufnahmen zur Histologie und Anatomie des Tabaks

Publié en ligne: 28 May 2014
Pages: 171 - 176

Résumé

Accès libre

Fixing Mechanism of Conidiophores of Peronospora Tabacina Adam / Der Haftmechanismus der Konidiosporen von Peronospora Tabacina Adam

Publié en ligne: 28 May 2014
Pages: 177 - 179

Résumé

Abstract

Microscopic examinations suggest that the trichomes, owing to their dew condensing qualities, when moist, and to their stickiness, when dry, are responsible for the trapping and fixing of the conidia. They can therefore be regarded to be the basis of the epidemic appearance of Peronospora tabacina Adam

Accès libre

Examination of the Influences of Tobacco Smoke Condensate on the Lung Tissue of Rats / Tierexperimentelle Lungengewebsveränderungen durch Tabakrauchkondensat

Publié en ligne: 28 May 2014
Pages: 180 - 186

Résumé

Abstract

Following an introductory survey of the literature concerning the induction of bronchial cancer in laboratory animals after exposure to cigarette smoke or intrapulmonary application of smoke condensates, a method is described for a single pertracheal instillation of smoke condensate into peripheral areas of the bronchial system of rats. Histological examination of the lungs showed the appearance of intrapulmonary foreign body granulomas and squamous cell metaplasia of the bronchial epithelium. According to the experiences of oncology, the lack of neoplastic reactions in spite of the 10 months’ duration of the experiments might be explained by the small dosages which had to be limited due to the applied technique. As far as we know at present, the possible maximum carcinogenic potency of the smoke condensates applied is only about 1/100 of those dosages of pure carcinogens which, according to the literature, are sufficient to cause bronchial carcinoma in rats. For technical reasons it seems recommendable for further in vivo studies with lung tissue to use concentrated tobacco smoke condensate or its fractions.

Accès libre

A New Automated Smoking Machine Allowing to Examine Various Smoking Conditions / Eine neue automatische Rauchmaschine zur Einstellung auf die verschiedensten Abrauchbedingungen

Publié en ligne: 28 May 2014
Pages: 187 - 191

Résumé

Abstract

A smoking machine has been built which, while being as simple as possible is designed to carry out almost every conceivable function that might be required of a laboratory smoking machine and which allows the operator complete freedom of choice on every aspect of his smoking conditions

Accès libre

An Apparatus for Automatic Weight Selection of Cigarettes / Eine Sortierwaage zur automatischen Selektion von Cigaretten

Publié en ligne: 28 May 2014
Pages: 193 - 194

Résumé

Abstract

An apparatus for automatic weight selection of cigarettes or filter rods has been constructed, which is specially suited for the preparation of working samples for chemical and physical tests

Accès libre

Standardized regulations for the analysis of tobacco and tobacco smoke / Einheitliche Vorschriften für die Analyse von Tabak und Tabakrauch

Publié en ligne: 28 May 2014
Pages: 195 - 198

Résumé

Abstract

4. Vorschrift für die Bestimmung des Nikotins im Tabak, im Tabakrauchkondensat und in Filtern 4.1 Bestimmung des Nikotins im Tabak 4.2 Bestimmung des Nikotins im Tabakrauchkondensat 4.3 Bestimmung des Nikotins in Cigarettenfiltern

8 Articles
Accès libre

Fundamental Reflections on the Chemical Composition of Tobacco Smoke and its Reactivity Products / Grundsätzliche Überlegungen zur chemischen Zusammensetzung des Tabakrauches und seiner Abscheidungsprodukte

Publié en ligne: 28 May 2014
Pages: 155 - 164

Résumé

Abstract

For the estimation of the different methods used for obtaining and fractioning tobacco tars, it is necessary to consider the reactivity of the For the estimation of the different methods used for obtaining and fractioning tobacco tars, it is necessary to consider the reactivity of the individual components and the characteristic action of the entire product. For analytical and biological tests a product is required which has not undergone any important chemical or biochemical changes. It is shown that this important condition has mostly been neglected. The changes likely to occur in the tar during the different smoking and preparation procedures are discussed. It is pointed out that a great number of compounds have been described, in particular in the more recent literature, which are eager to react with other substances and which, being constituents of tobacco smoke, might be responsible for such chemical changes.Several tars were submitted to a limited ageing under different physical conditions. Such simple tests demonstrate the important changes taking place in the original tar when submitted to temperature, light and air and if concentrations in the solvent are too high. On the basis of such general reflections it is concluded that the biological tests described until now require reexamination and that it is necessary to develop and apply such procedures, both for the production and the preparation of tobacco tars, which prevent the formation of artefacts

Accès libre

A New Apparatus for the Collection of Tobacco Smoke for Producing Native Tobacco Tar / Eine neue maschinelle Abrauch- und Rauchabscheidungsapparatur zur Gewinnung von „nativem“ Tabakteer

Publié en ligne: 28 May 2014
Pages: 165 - 169

Résumé

Accès libre

Microphotography of Histology and Anatomy of Tobacco / Mikroaufnahmen zur Histologie und Anatomie des Tabaks

Publié en ligne: 28 May 2014
Pages: 171 - 176

Résumé

Accès libre

Fixing Mechanism of Conidiophores of Peronospora Tabacina Adam / Der Haftmechanismus der Konidiosporen von Peronospora Tabacina Adam

Publié en ligne: 28 May 2014
Pages: 177 - 179

Résumé

Abstract

Microscopic examinations suggest that the trichomes, owing to their dew condensing qualities, when moist, and to their stickiness, when dry, are responsible for the trapping and fixing of the conidia. They can therefore be regarded to be the basis of the epidemic appearance of Peronospora tabacina Adam

Accès libre

Examination of the Influences of Tobacco Smoke Condensate on the Lung Tissue of Rats / Tierexperimentelle Lungengewebsveränderungen durch Tabakrauchkondensat

Publié en ligne: 28 May 2014
Pages: 180 - 186

Résumé

Abstract

Following an introductory survey of the literature concerning the induction of bronchial cancer in laboratory animals after exposure to cigarette smoke or intrapulmonary application of smoke condensates, a method is described for a single pertracheal instillation of smoke condensate into peripheral areas of the bronchial system of rats. Histological examination of the lungs showed the appearance of intrapulmonary foreign body granulomas and squamous cell metaplasia of the bronchial epithelium. According to the experiences of oncology, the lack of neoplastic reactions in spite of the 10 months’ duration of the experiments might be explained by the small dosages which had to be limited due to the applied technique. As far as we know at present, the possible maximum carcinogenic potency of the smoke condensates applied is only about 1/100 of those dosages of pure carcinogens which, according to the literature, are sufficient to cause bronchial carcinoma in rats. For technical reasons it seems recommendable for further in vivo studies with lung tissue to use concentrated tobacco smoke condensate or its fractions.

Accès libre

A New Automated Smoking Machine Allowing to Examine Various Smoking Conditions / Eine neue automatische Rauchmaschine zur Einstellung auf die verschiedensten Abrauchbedingungen

Publié en ligne: 28 May 2014
Pages: 187 - 191

Résumé

Abstract

A smoking machine has been built which, while being as simple as possible is designed to carry out almost every conceivable function that might be required of a laboratory smoking machine and which allows the operator complete freedom of choice on every aspect of his smoking conditions

Accès libre

An Apparatus for Automatic Weight Selection of Cigarettes / Eine Sortierwaage zur automatischen Selektion von Cigaretten

Publié en ligne: 28 May 2014
Pages: 193 - 194

Résumé

Abstract

An apparatus for automatic weight selection of cigarettes or filter rods has been constructed, which is specially suited for the preparation of working samples for chemical and physical tests

Accès libre

Standardized regulations for the analysis of tobacco and tobacco smoke / Einheitliche Vorschriften für die Analyse von Tabak und Tabakrauch

Publié en ligne: 28 May 2014
Pages: 195 - 198

Résumé

Abstract

4. Vorschrift für die Bestimmung des Nikotins im Tabak, im Tabakrauchkondensat und in Filtern 4.1 Bestimmung des Nikotins im Tabak 4.2 Bestimmung des Nikotins im Tabakrauchkondensat 4.3 Bestimmung des Nikotins in Cigarettenfiltern

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