Zobrazeno 1 - 10
of 53
pro vyhledávání: '"H, Barkemeyer"'
Autor:
I. Jurna, H. Barkemeyer
Publikováno v:
Effects of Nicotine on Biological Systems ISBN: 9783034874595
The effects of nicotine and some other hedonic agents (ethanol, morphine, caffeine, DL-amphetamine) on spontaneous activity of hippocampus neurones in the rat have been studied. It was found that only nicotine and ethanol exclusively increase the num
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a9734b5492c74bb34b896ddd209c630
https://doi.org/10.1007/978-3-0348-7457-1_51
https://doi.org/10.1007/978-3-0348-7457-1_51
Publikováno v:
Journal of Animal Breeding and Genetics. 106:433-442
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c0f74788e71cfc17eceebbe9d70f1a4
https://doi.org/10.1111/j.1439-0388.1989.tb00261.x
https://doi.org/10.1111/j.1439-0388.1989.tb00261.x
Autor:
G. Scherer, H. Barkemeyer
Publikováno v:
Ecotoxicology and Environmental Safety. 7:71-78
The amount of cadmium in tobacco depends on the variety and origin of the plant as well as on the analytical method used to determine cadmium. In the literature, cadmium concentrations in tobacco of between 0.5 and 5 ppm are reported. Modern German c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7223065f5b70c36a43ff6341dc8ab65d
https://doi.org/10.1016/0147-6513(83)90050-7
https://doi.org/10.1016/0147-6513(83)90050-7
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:
H. Barkemeyer
Publikováno v:
Beiträge zur Tabakforschung International, Vol 3, Iss 7, Pp 455-459 (1966)
A new spectrophotometric method, suitable for routine determination of nitrate in tobacco, is described. Quantities as low as 0.05 % of nitrate in tobacco are determinable, the results can be reproduced very well (RSD (relative standard deviation) =
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd8a9960d9911da65e9f318a1e1f7fae
https://doaj.org/article/7b92ed3a98564e32a6d3c42f46f47464
https://doaj.org/article/7b92ed3a98564e32a6d3c42f46f47464
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
Autor:
H. Barkemeyer, F. Seehofer
Publikováno v:
Beiträge zur Tabakforschung International, Vol 1, Iss 3, Pp 93-96 (1961)
A new apparatus is described for collecting the particle phase of tobacco smoke in liquids in the most careful way. The method was developed in order to avoid secondary reactions and is infinitely variable. The described apparatus is simple, and cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78cea1935ffab8abeb6ebaeb94b710d7
https://doaj.org/article/4d05596c55e04fcf939b7b3f4b4f2624
https://doaj.org/article/4d05596c55e04fcf939b7b3f4b4f2624
Publikováno v:
Beiträge zur Tabakforschung International, Vol 1, Iss 10, Pp 383-397 (1962)
Chemical and analytical characteristics of dithiocarbamates are described in detail. Thorn and Ludwig (49) published an excellent book dealing in detail with a large number of problems discussed in this publication. Present pharmacological examinatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fd21e4a1df4320a2249caaefc1ac447
https://doaj.org/article/9d076bc16482413799e58903aa3e495d
https://doaj.org/article/9d076bc16482413799e58903aa3e495d
Autor:
H. Barkemeyer, Robert G. Strachan, John B. Conn, Ralph Hirschmann, Robert G. Denkewalter, Suzanne Miller, Erwin F. Schoenewaldt, Daniel F. Veber, Harvey Schwam, Victor M. Garsky
Publikováno v:
Journal of the American Chemical Society. 93:2746-2754
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71600285fad0149fde9cc5a4652137ec
https://doi.org/10.1021/ja00740a027
https://doi.org/10.1021/ja00740a027
Autor:
F. Seehofer, H. Barkemeyer
Publikováno v:
Zeitschrift für Lebensmittel-Untersuchung und -Forschung. 112:50-52
Nicotin hat in saurer, wasriger Losung bei 259 mμ eine fast doppelt so grose Absorptionskonstante wie in schwach alkalischer, wasriger Losung. Diese durch pH-Verschiebung bewirkte Differenz erlaubt die photometrische Bestimmung des Nicotins in Gegen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d53f42cf63910aaaa78acafcb30bf6d
https://doi.org/10.1007/bf01856319
https://doi.org/10.1007/bf01856319