Ueber das atmosphärische Wasserstoffhyperoxyd

Schöne, Em.

doi:10.1002/cber.187801101146

Cited by 5 publications

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“…Part of the variability could be due to ambient air H 2 O 2 [18] which has rarely been realised by researchers [19]. This would not pose a major problem if the ambient air levels would be much lower than the levels generated via endogenous H 2 O 2 production in the exhaled air.…”

Section: Discussionmentioning

confidence: 99%

“…If the concentrations found in EBC are expressed as vapour in relation to water vapour, it turns out that the concentrations reported by S chöne [18] as well as in meteorological papers [20, 21] are of the same order of magnitude as the values in EBC. Recent findings confirmed this, as H 2 O 2 concentrations measured in exhaled air of calves, particularly in EBC, were significantly correlated with the ones assessed in ambient air [19].…”

Section: Introductionmentioning

confidence: 93%

“…H 2 O 2 also occurs in ambient air, predominantly in vapour form, which has been known since the 1870s [18] but has been rarely considered [19]. If the concentrations found in EBC are expressed as vapour in relation to water vapour, it turns out that the concentrations reported by S chöne [18] as well as in meteorological papers [20, 21] are of the same order of magnitude as the values in EBC.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen peroxide in exhaled air: a source of error, a paradox and its resolution

et al. 2016

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The concentration of hydrogen peroxide (H2O2) in exhaled air has been reported to be elevated in asthma and chronic obstructive pulmonary disease (COPD), but results are inconsistent and difficult to reproduce. As H2O2 occurs in ambient air, we examined its association with exhaled H2O2 in human subjects.Exhaled breath condensate (EBC) of 12 COPD patients and nine healthy control subjects was collected either with an inhalation filter (efficiency 81%) or without. Ambient air condensate (AAC) was collected in parallel and samples were analysed for H2O2. Additionally, ambient H2O2 was recorded by an atmospheric measuring device (online fluorometric measurement).H2O2 concentration in AAC was significantly higher (p<0.001) than in EBC. AAC variations were concordant with the data from the atmospheric measuring instrument. In both subjects' groups, the inhalation filter reduced H2O2 values (p<0.01). Despite generally low levels in exhaled air, analysis by a mathematical model revealed a contribution from endogenous H2O2 production.The low H2O2 levels in exhaled air are explained by the reconditioning of H2O2-containing inhaled air in the airways. Inhaled H2O2 may be one factor in the heterogeneity and limited reproducibility of study results. A valid determination of endogenous H2O2 production requires inhalation filters.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Hydrogen peroxide in exhaled air: a source of error, a paradox and its resolution

et al. 2016

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“…H 2 O 2 is an important species in photochemical smog as a chain terminator. Its concentration in rainwater and snow has been measured since the late nineteenth century (Schöne, 1874), and studies have found strong seasonal and diurnal variations in the concentrations of H 2 O 2 and other reactive oxygen species (ROS) in rainwater, water vapor, and air in gas phase (Singh et al, 1986;Gunz and Hoffman, 1990, and references within;Ayers et al, 1992;Dollard and Davies, 1992;Lee et al, 2000;Yamada et al, 2002;Liu et al, 2003;Zhang et al, 2012). However, data on peroxide and ROS concentrations in the aerosol phase are limited.…”

Section: Introductionmentioning

confidence: 99%

Technical Note: Particulate reactive oxygen species concentrations and their association with environmental conditions in an urban, subtropical climate

Khurshid¹,

Siegel²,

Kinney³

2014

Preprint

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Abstract. Reactions between hydrocarbons and ozone or hydroxyl radicals lead to the formation of oxidized species, including reactive oxygen species (ROS), and secondary organic aerosol (SOA) in the troposphere. ROS can be carried deep into the lungs by small aerodynamic particles where they can cause oxidative stress and cell damage. While environmental studies have focused on ROS in the gas-phase and rainwater, it is also important to determine concentrations of ROS on respirable particles. Samples of PM2.5 collected over 3 h at midday on 40 days during November 2011 and September 2012 show that the particulate ROS concentration in Austin, Texas ranged from a minimum value of 0.02 nmol H2O2 (m3 air)−1 in December to 3.81 nmol H2O2 (m3 air)−1 in September. Results from correlation tests and linear regression analysis on particulate ROS concentrations and environmental conditions (which included ozone and PM2.5 concentrations, temperature, relative humidity, precipitation and solar radiation) indicate that ambient particulate ROS is significantly influenced by the ambient ozone concentration, temperature and incident solar radiation. Particulate ROS concentrations measured in this study were in the range reported by other studies in the US, Taiwan and Singapore. This study is one of the first to assess seasonal variations in particulate ROS concentrations and helps explain the influence of environmental conditions on particulate ROS concentrations.

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Zur Frage über das Vorkommen des Wasserstoffhyperoxyds in der atmosphärischen Luft und den atmosphärischen Niederschlägen

Schöne¹

1893

Ber. Dtsch. Chem. Ges.

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setzung eines Dinitromethan-Hisazobenzols, ist also durch Eintritt zweier Diazobenzolreste in das Dinitromethan entstanden: 2 c 6 HSNa (=I + H2 C(N02)2 = 2 H c 1 + (c6 H5 N Z )~ : c : (N02)2. Procente: C 49.69, H 3.19, N 26.75. Gef.)) )) 49.64, 49.53, )) 3.13, 3.27, )) 27.03. Analyse: Ber. fur ClaHloN~jO. Die gelben Krystalle schmelzen bei 750 unter Gasentwicklung zu e h e r dunkelrothen Fliissigkeit zusammen, die beim Erkalten z. Th. wieder erstarrt. Die dabei entstehenden Producte wurden nicht naher untersucht. Das Dinitromdanbisazobenzol ist in allen organischen Losungsrnitteln leicht lijslich, auch Wasser lost es in massiger Warme ohne Zersetzung auf. Beim Kochen der Liisungen tritt leicht Verharzung ein, tluch Alkalien zersetzen es beim Erhitzen. Die Entstehung einer Formazylverbindung , die bei der Einwirkung von iiberschiisaigem Diazobenzolsalz auf Dinitromethan erwartet werden sollte, habe ich nicht beobachten konnen. Offenbar vermag der Diazobenzolrest die Nitrogruppen nicht zu verdrangen. Es liegt hier also sehr wahrscheinlich eine echte gemischte Azoverbindung vor. Das Studium des Dinitromethans und seiner Derivate wird fortgesetzt.668. Em. Sohone: Zur Frage uber das Vorkommen d e s Wasserstoffhyperoxyds in der atmosphiirischen Luft und den atmospharischen Niederschl%gen. (Eingeg. am 7. December.) Nu'achdem seit dem Jahre 1863 von verschiedenen Forschern ( M e i s s n e r , S c h i j n b e i n , H. S t r u v e , W e r n e r S c h m i d und G o p p e l s r o e d e r ) die Gegeiiwart des Wasserstoffhyperoxyds in atmospharischen Niederschlagen in einzelncn Fallen an verschiedenen Qrten der Erdoberflache sicher festgestellt war, habe ich') in den Jabren 1874 und 1875 in der Umgegend von Moskau eine ausfiihrliche, systematische Untersuchuug ausgefiihrt, zur Feststellung der Gesetzmlssigkeiten, denen die Schwankungen der Mengen des in der Luft und deren Kiederschlagen vorkommenden Hyperoxyds unterworfen sind. 1) Em. Sohone. Diese Berichte 7, 1693; 11, 481, 561, 874 und 1028. -Vergl. auch S. K e r n , welcher in der Umgegend von St. Petersburg ainige Beobachtungen gemacht hat, in Chem. News 37, 35; 1878. ' ) L. I l o s v a y de N. Ilosva. Bull. soc. chim. [3] 2, 345, 351, YSi, 360, 377, 388, 666, 734, 736, 738 und 741. a) P. Griess, diese Berichte 12, 426. -Vergl. aiich P. Weselskp und R. B e n e d i k t , dipse Berichte 12, 228 uod A. P e r c y S m i t h , Chem. Centr. 1887, 1267. -Ilosvay d e N. Ilosva behauptet, dass man mit diesem Reagens noch Reactionen erhalte in Flussigkeiten, welche nur sin Billiontel (!) salpetrige Siiure enthalten. Nach meinen Erfahrungeo liegt die Empfindlichkeitsgrenze hoher, namlich zwischen einem Hundertmilliontel nud einem Tausendmilliontel salpetriger-SZlure. 7) J. T. Cundall, diese Berichte 24, Ref. 690. 8) L. I l o s v a y de N. Ilosva, Bull. soc. chim. [ S ] 4, 707, 1890. 9) Brockh aus' Conversations-Lexicon, Supplementbd., Leipzig 1857, S.207. ' 0 ) Petermann's Mittheilungen, Ergiinzungsheft No. 107, 1593, S. 23.

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Ueber das atmosphärische Wasserstoffhyperoxyd

Cited by 5 publications

References 2 publications

Hydrogen peroxide in exhaled air: a source of error, a paradox and its resolution

Hydrogen peroxide in exhaled air: a source of error, a paradox and its resolution

Technical Note: Particulate reactive oxygen species concentrations and their association with environmental conditions in an urban, subtropical climate

Zur Frage über das Vorkommen des Wasserstoffhyperoxyds in der atmosphärischen Luft und den atmosphärischen Niederschlägen

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