Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Ari Ukkonen"'
Publikováno v:
Pharmaceutical Research. 34:1707-1715
This work investigated the effect of relative humidity (RH) on bipolar electrostatic charge profiles of dry powder inhaler aerosols using the Bipolar Charge Analyzer (BOLAR). Two commercial products, Pulmicort® (400 μg, budesonide) and Bricanyl® (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04421daee2355727bd122da45370b9d4
https://doi.org/10.1007/s11095-017-2178-3
https://doi.org/10.1007/s11095-017-2178-3
Publikováno v:
Pharmaceutical Research. 33:283-291
To investigate the applicability of Bipolar Charge Analyzer (BOLAR), a new commercial instrument developed by Dekati Ltd., in simultaneously characterizing the bipolar electrostatic charge profile and measuring the size distribution of commercial met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29bf24611d2699027944b3abb8a41ebd
https://doi.org/10.1007/s11095-015-1786-z
https://doi.org/10.1007/s11095-015-1786-z
Publikováno v:
Journal of Pharmaceutical Sciences
Aerosols emitted from metered dose inhalers (MDIs) are generally electrically charged and bipolar in nature. Although a spacer can effectively dampen the charge magnitude of aerosols, the electrostatic interactions between the positively and negative
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac21d86169fa6c646eaae3527a102a43
https://pubmed.ncbi.nlm.nih.gov/28238902
https://pubmed.ncbi.nlm.nih.gov/28238902
Autor:
Ville Niemelä, Steve Layzell, Jaakko Yli-Ojanperä, Jorma Keskinen, Anssi Järvinen, Ari Ukkonen
Publikováno v:
Journal of Aerosol Science. 77:16-30
The Bipolar Charge Analyzer (BOLAR, Dekati Ltd.) is a new commercial instrument developed to characterize bipolar charge and charge-to-mass ratio of powders and inhaled aerosols as a function of particle size. The instrument combines aerodynamic size
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f6cebbd5207b745e40ea4a1362b6799
https://doi.org/10.1016/j.jaerosci.2014.07.004
https://doi.org/10.1016/j.jaerosci.2014.07.004
Autor:
Jaakko Yli-Ojanperä, Antti Rostedt, Ari Ukkonen, Kauko Janka, Marko Marjamäki, Ville Niemelä, Jorma Keskinen
Publikováno v:
Aerosol and Air Quality Research. 9:470-477
A novel particle emission sensor based on particle charging and electrical detection is presented. The sensor charges the particles and measures the current carried by the particles exiting the sensor. The measurement is carried out without collectin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2b19836781d98900e345e9131b2bae1
https://doi.org/10.4209/aaqr.2009.03.0023
https://doi.org/10.4209/aaqr.2009.03.0023
Publikováno v:
The Journal of Chemical Physics. 105:1562-1571
Mobility distributions of both positive and negative cluster ions were studied in nitrogen gas enriched by ethanol, isopropanol, n‐butanol and acetone vapours, respectively. The ions were generated into the system by a radioactive source normally u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c28347693f7cd3c7d9ca0a1e72a40388
https://doi.org/10.1063/1.472017
https://doi.org/10.1063/1.472017
Publikováno v:
Tampere University
Mobility distributions of both positive and negative cluster ions in acetone rich air were studied. A bipolar radioactive charger was used to irradiate air which contained acetone vapour within a wide range of concentrations (∼ 100–300,000 ppm).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f6d210a7b9957bb11aa479d491a309c
https://doi.org/10.1016/0021-8502(95)00560-9
https://doi.org/10.1016/0021-8502(95)00560-9
Publikováno v:
Journal of Aerosol Science. 26:S787-S788
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::500df5a3c1a9e0bda0b70199b846ebb4
https://doi.org/10.1016/0021-8502(95)97301-t
https://doi.org/10.1016/0021-8502(95)97301-t
Publikováno v:
Tampere University
Publisher Summary This chapter presents the results of n-butanol. It introduces Tammet's relationship as a possible improvement for Millikan–Fuchs relationship at 1 nm size range but this is still somewhat ambiguous. The chapter deals with ionic cl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e5fa080974b82b2e74a54d65be24aaa
https://researchportal.tuni.fi/en/publications/a59e1fe5-e3fa-4521-ad20-de8e12e6211e
https://researchportal.tuni.fi/en/publications/a59e1fe5-e3fa-4521-ad20-de8e12e6211e
Publikováno v:
Tampere University
Ukkonen, A, Keskinen, J & Lehtimäki, M 1991, ' Combined electrical and optical detection in continuous mass monitoring ', Journal of Aerosol Science, vol. 22, no. Supplement 1, pp. 367-370 . https://doi.org/10.1016/S0021-8502(05)80114-4
Ukkonen, A, Keskinen, J & Lehtimäki, M 1991, ' Combined electrical and optical detection in continuous mass monitoring ', Journal of Aerosol Science, vol. 22, no. Supplement 1, pp. 367-370 . https://doi.org/10.1016/S0021-8502(05)80114-4
A simple method is described to estimate the mass median diameter of an aerosol bycombining the simultaneous output data of an aerosol photometer and an electrical aerosol detector. The method is based on different size dependence of the mass sensiti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4cce8d6f8057e5d6358eb23414ed5db7
https://researchportal.tuni.fi/en/publications/3fff9d0d-2152-4520-969f-4cf30f610554
https://researchportal.tuni.fi/en/publications/3fff9d0d-2152-4520-969f-4cf30f610554