<DIV align=justify> Beiträge zur Tabakforschung International/Contributions to Tobacco Research welcomes new, unpublished original contributions and review articles relating to the various aspects of tobacco science, including physical and chemical analysis of tobacco and tobacco smoke, pertinent matters to the manufacture of tobacco products, research into tobacco plants including biotechnology, plant treatment substances, protecting agents, leaf tobacco, statistical data processing, and human smoking behaviour including biomonitoring. <A>Similarity Check Plagiarism Screening System</A> The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. Detailed description of the Similarity Check System can be found at: <A href="https://www.crossref.org/services/similarity-check/">www.crossref.org/services/similarity-check/</A> </DIV>

The Journal of BTFI GmbH

Beiträge zur Tabakforschung International/Contributions to Tobacco Research

The yield of selected components in the mainstream and sidestream smoke for cigarettes of different tobacco types and a set of Kentucky Reference cigarettes have been measured. The BAT ‘fishtail’ chimney apparatus was used in conjunction with standard FTC Cambridge pad collection apparatus for the simultaneous collection of both sidestream (SS) and mainstream (MS) cigarette smoke, respectively. Comparison of MS FTC yields and MS yields from the BAT MS/SS smoke collection device showed that the smoke yields for the products of this study were similar for the two methods. Sidestream to mainstream smoke ratios (SS/MS) for TPM, nicotine, HO, ‘tar’, CO and COwere similar to those reported in the literature, despite the variety of collection devices employed in literature reports. The total nicotine accountabilities for the single tobacco cigarettes and the set of Reference cigarettes of this study were relatively constant (~53 %). Enantiomeric separation of the alkaloids in the different smoke streams was accomplished by chiral gas chromatography-mass selective detection. The levels and the enantiomeric ratios of nicotine and nornicotine varied in the smoke streams of the different cigarettes. The level and enantiomeric ratios of anaba-sine and anatabine in sidestream smoke were below detection limits of the method employed. The enantio-meric ratios of these secondary alkaloids could not be calculated. The fraction ofd -nicotine transferred to side-stream smoke did not change significantly when compared to that yielded in mainstream smoke even though the temperatures experienced during the side-stream smoke formation process are quite different (lower) from those occurring in the mainstream smoke formation process. Relatively low concentrations of the secondary alkaloids provided only a preliminary evaluation of their enantiomeric distribution in cigarette smoke.

Abstract

R. J. Reynolds Tobacco Company, Winston-Salem, NC 27102-1487, USA.

<article-title>Determination of Mainstream and Sidestream Cigarette Smoke Components for Cigarettes of Different Tobacco Types and a Set of Reference Cigarettes</article-title>

Determination of Mainstream and Sidestream Cigarette Smoke Components for Cigarettes of Different Tobacco Types and a Set of Reference Cigarettes

The following discussion looks at some of the results of the paper by PERFETTI et al. (1) from a different perspective. Those results are in Tables 3 and 7 of PERFETTI et al. Tables in this discussion are identified by letter rather than number to avoid confusion. The main purpose of the discussion is to suggest that sidestream (SS) and mainstream (MS) yields of a smoke component should be “normalised” to SS and MS tars respectively before calculating SS/MS ratios. With the ubiquitous use of filter ventilation, simple SS/MS ratios are subject to substantial variation and may be of limited value in understanding the smoke system. BROWNE et al. (2) found that as ventilation increases (0-83 %), the SS/MS ratio for smoke nicotine increased (3.49-13.11) and PERFETTI et al. found a similar trend. This is because of the known reduction in mainstream nicotine with ventilation and the known relatively minor effect of ventilation on sidestream yields. It follows that, with the introduction of ventilation in many products, SS/MS ratios for many smoke components will have a very wide range, making this ratio of relatively little value in understanding the underlying system. However, if the SS and MS yields of component X (in this case nicotine) are “normalised” to SS and MS tar yields respectively, then a more useful ratio can be calculated. That ratio is SS yield of X per unit SS tar divided by MS yield of X per unit MS tar. In the case of nicotine/tar ratio (NTR) it is conveniently expressed as a percentage, or milligrams of nicotine per 100 mg of tar. Tables A - C use tobacco nicotine (%), weight of nicotine consumed (mg), weight of tobacco consumed (mg), MS and SS tar and nicotine (mg) from tables of PERFETTI et al. to calculate other variables and construct scatter plots. In Table A, “nicotine transfer” is the MS or SS nicotine (mg) divided by weight of nicotine consumed (mg) expressed as a percentage. “NTR” was defined previously. “TANT” (“Tar Adjusted Nicotine Transfer”) is the NTR (%) divided by tobacco nicotine (%). Table B gives the SS/MS nicotine ratios from Table 3 of PERFETTI et al. and, additionally, the SS/MS NTR ratios calculated from Table A.

British American Tobacco, Southampton, UK

<article-title>Discussion of a Study on the “Determination of Mainstream and Sidestream Cigarette Smoke Components for Cigarettes of Different Tobacco Types and a Set of Reference Cigarettes”</article-title>

Discussion of a Study on the “Determination of Mainstream and Sidestream Cigarette Smoke Components for Cigarettes of Different Tobacco Types and a Set of Reference Cigarettes”

The 52nd Tobacco Science Research Conference (TSRC) was held from 13th to 16th September 1998 in Atlanta, U.S.A., at the invitation of the University of Georgia, Atlanta. Two parallel sessions were held during which 64 papers were presented dealing with the results of recent biotechnological research with respect to the tobacco plant, as well as research into the manufacture and analysis of tobacco products, human smoking behaviour and the effects of pyrolytic products on the environment and the organism.

Verband der Cigarettenindustrie, KönigswintererStrasse 550, 53227 Bonn, Germany

Analytisch-Biologisches Forschungslabor, Goethestrasse 20, 80336 München, Germany

<article-title>Conference Report: 52nd Tobacco Science Research Conference (TSRC), September 13-16, 1998, Atlanta, Georgia, USA</article-title>

Conference Report: 52nd Tobacco Science Research Conference (TSRC), September 13-16, 1998, Atlanta, Georgia, USA

The 51st German Plant Protection Conference was held by the Federal Biological Institute of Agriculture and Forestry [BiologischeBundesanstaltfür Land- und Forstwirtschaft] in Halle/Saale from 5th to 8th October 1998. The attendance of over 1,000 registered participants reflected the continued lively interest shown in the conference. Some 330 oral contributions, assigned to the various sections, were presented in five parallel sessions.

<article-title>Conference Report: 51st German Plant Protection Conference, October 5-8, 1998, in Halle/Saale, Germany</article-title>

Conference Report: 51st German Plant Protection Conference, October 5-8, 1998, in Halle/Saale, Germany

2828 Birchwood Drive, Winston-Salem, North Carolina, 27103-3410, USA

<article-title>Letter to the Editor: “Tobacco Smoke Components”</article-title>

Letter to the Editor: “Tobacco Smoke Components”

{"article-title":"Letter to the Editor: \u201cTobacco Smoke Components\u201d"}

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

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