Zobrazeno 1 - 10
of 94
pro vyhledávání: '"F. Seehofer"'
Autor:
E. Nesemann, F. Seehofer
Publikováno v:
Beiträge zur Tabakforschung International, Vol 7, Iss 5, Pp 251-262 (1974)
The screening procedure for the determination of pesticide residues in tobacco (organochlorine, organophosphorus and carbamate insecticides) published in 1970 has been improved by introduction of the dry-column chromatography as cleanup procedure. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44a5840fcd74ae981487f996c74d293a
https://doaj.org/article/364dd524bc734943a5acdfb791617774
https://doaj.org/article/364dd524bc734943a5acdfb791617774
Publikováno v:
Beiträge zur Tabakforschung International, Vol 7, Iss 4, Pp 240-243 (1974)
The author's method (developed in 1966) for the determination of maleic hydrazide in tobacco has been improved by the introduction of a purification step using activated carbon. Interferences produced by reactive compounds other than maleic hydrazide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5556364ee0b0b0ecb6fd44035ff2f8c8
https://doaj.org/article/c5b2451cce67437d82c7e6ec32c5ff14
https://doaj.org/article/c5b2451cce67437d82c7e6ec32c5ff14
Publikováno v:
Beiträge zur Tabakforschung International, Vol 1, Iss 10, Pp 398-410 (1962)
In spite of the successful application of chemical compounds (Maneb, Zineb) the aim to control the disease is the breeding of resistant varieties. We propose to select (phenotypically) resistant isolated plants, a method which has proved to be rather
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::436f0707b6ee2d778aab9f7b781db618
https://doaj.org/article/fc10c6af88434c5f82d903933203b923
https://doaj.org/article/fc10c6af88434c5f82d903933203b923
Autor:
F. Seehofer, H. Barkemeyer
Publikováno v:
Contributions to Tobacco & Nicotine Research. 4:278-282
The NO content of the gas-vapour phase of cigarette smoke is determined by a simple colourimetric procedure: NO is absorbed by a solution of FeSO4 in diluted H2SO4 up to an equilibrium with the formation of the addition compound Fe•NO•SO4. The sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::066ebb702e86283d2bb3d4a8f23700b7
https://doi.org/10.2478/cttr-2013-0197
https://doi.org/10.2478/cttr-2013-0197
Autor:
F. Seehofer, K. Deppe
Publikováno v:
Contributions to Tobacco & Nicotine Research. 3:520-528
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cdbd6712e198d8f543153d7396babae
https://doi.org/10.2478/cttr-2013-0149
https://doi.org/10.2478/cttr-2013-0149
Autor:
E. Nesemann, F. Seehofer
Publikováno v:
Beiträge zur Tabakforschung International, Vol 5, Iss 6, Pp 290-294 (1970)
A screening method has been developed for the qualitative and quantitative determination of vanillin, ethylvanillin, coumarin and dihydrocoumarin. The compounds are qualitatively determined by thin-layer chromatography after extraction of tobacco and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cf7eb04e6a8934cf51869035d8bd6ed
https://doaj.org/article/8fc32f70e4ad4775bd30605100941bef
https://doaj.org/article/8fc32f70e4ad4775bd30605100941bef
Publikováno v:
Beiträge zur Tabakforschung International, Vol 4, Iss 5, Pp 197-200 (1968)
A thin-layer chromatographic method has been developed for the qualitative and quantitative determination of carbamate residues on tobacco. The method's inferior limit of detection is 80 ng for Carbaryl and 200 ng for Undene. The coefficient of varia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e91a45c906c3c1feb19deef836544f7
https://doaj.org/article/3a8a83792b4f4147a1892d22c6c5bc2c
https://doaj.org/article/3a8a83792b4f4147a1892d22c6c5bc2c
Autor:
F. Seehofer, H.W. Lorenz
Publikováno v:
Beiträge zur Tabakforschung International, Vol 6, Iss 1, Pp 1-6 (1971)
The suitability of electric measuring methods making use of transducers has been tested for the smoking parameters puff duration, draw resistance, puff profile and puff volume. The procedures proved to be accurate, reproducible and technically simple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9aaa50ce3362e065875b5eaa30d97d1
https://doi.org/10.2478/cttr-2013-0258
https://doi.org/10.2478/cttr-2013-0258
Autor:
D. Hanssen, F. Seehofer
Publikováno v:
Beiträge zur Tabakforschung International, Vol 3, Iss 4, Pp 291-300 (1965)
Construction and working principle of an automatic capillary press, a smoking machine for preparing instant smoke condensate of 15 cigarettes per smoking procedure, are presented. The smoking capacity is 500 cigarettes per day. Condensate production
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8df3bb7fb83f3465981b8e2c34016e1a
https://doaj.org/article/8c6088fc447c489e8a0e5c51c434b3d0
https://doaj.org/article/8c6088fc447c489e8a0e5c51c434b3d0
Publikováno v:
Beiträge zur Tabakforschung International, Vol 1, Iss 1, Pp 11-14 (1961)
Nous décrivons des perfectionnemt-nU de la machine à fumrt automatique, la précipitation de la phase particulaire à la surface intérieure d'un tube de verre est effectuée par un champ élec= trostatique de 20000 volt». Une soupape croisée int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81bf3f18a70dff0be9efdb8cb175f831
https://doaj.org/article/e36f9827a2b646e3b3f5c0418c19d1fd
https://doaj.org/article/e36f9827a2b646e3b3f5c0418c19d1fd