Isotopomeric characterization of N(2)O produced, consumed, and emitted by automobiles.

Isotopomeric characterization of N(2)O produced, consumed, and emitted by automobiles. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Isotopomeric characterization of N(2)O produced, consumed, and emitted by automobiles. Abstract Text:

Sakae Toyoda,Sei-Ichiro Yamamoto,Shinji Arai,Hideki Nara,Naohiro Yoshida,Kiriko Kashiwakura,Ken-Ichi Akiyama,

Fossil fuel combustion is the second largest anthropogenic source of nitrous oxide (N(2)O) after agriculture. The estimated global N(2)O flux from combustion sources, as well as from other sources, still has a large uncertainty. Herein, we characterize automobile sources using N(2)O isotopomer ratios (nitrogen and oxygen isotope ratios and intramolecular site preference of (15)N, SP) to assess their contributions to total global sources and to deconvolute complex production/consumption processes during combustion and subsequent catalytic treatments of exhaust. Car exhaust gases were sampled under running and idling state, and N(2)O isotopomer ratios were measured by mass spectrometry. The N(2)O directly emitted from an engine of a vehicle running at constant velocity had almost constant isotopomer ratios (delta(15)N(bulk) = -28.7 +/- 1.2 per thousand, delta(18)O = 28.6 +/- 3.3 per thousand, and SP = 4.2 +/- 0.8 per thousand) irrespective of the velocity. After passing through catalytic converters, the isotopomer ratios showed an increase which varied with the temperature and the aging of the catalysts. The increase suggests that both production and consumption of N(2)O occur on the catalyst and that their rates can be comparable. It was noticed that in the idling state, the N(2)O emitted from a brand new car has higher isotopomer ratios than that from used cars, which indicate that technical improvements in catalytic converters can reduce the N(2)O from mobile combustion sources. On average, the isotopomeric signatures of N(2)O finally emitted from automobiles are not sensitive to running/idling states or to aging of the catalysts. Characteristic average isotopomer ratios of N(2)O from automobile sources are estimated at -4.9 +/- 8.2 per thousand, 43.5 +/- 13.9 per thousand, and 12.2 +/- 9.1 per thousand for delta(15)N(bulk), delta(18)O, and SP, respectively. Copyright (c) 2008 John Wiley & Sons, Ltd.

Isotopomeric characterization of N(2)O produced, consumed, and emitted by automobiles. Publishing Authors By Initials

S Toyoda,S Yamamoto,S Arai,H Nara,N Yoshida,K Kashiwakura,K Akiyama,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Isotopomeric characterization of N(2)O produced, consumed, and emitted by automobiles. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Rapid communications in mass spectrometry : RCM

VOLUME: 22

Page Numbers: 603-12

Journal Abbreviation: Rapid Commun. Mass Spectrom.

ISSN: 0951-4198

DAY: 18

MONTH: 02

YEAR: 2008

Isotopomeric characterization of N(2)O produced, consumed, and emitted by automobiles. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 8802365

Isotopomeric characterization of N(2)O produced, consumed, and emitted by automobiles. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: Isotopomeric characterization of N(2)O produced, consumed, and emitted by automobiles. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Isotopomeric characterization of N(2)O produced, consumed, and emitted by automobiles.

AFFILIATION: Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan.

Country: England

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Rapid Commun Mass Spectrom

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Isotopomeric characterization of N2O produced, consumed, and emitted by automobiles Related Publications

• A real-time quantitative PCR detection method for pork, chicken, beef, mutton, and horseflesh in foods.
• Annual reproductive cycle of a bitterling, Tanakia tanago, reared in an outdoor tank.
• C--C Coupling Reactions of Superstrong CF(3) Groups with C(sp(2))-H Bonds: Reactivity and Synthetic Utility of Zero-Valent Niobium Catalyst.
• Coexistence of amyotrophic lateral sclerosis and argyrophilic grain disease: A non-demented autopsy case showing circumscribed temporal atrophy and involvement of the amygdala.
• Development of a quantitative bio/chemiluminescence spectrometer determining quantum yields: re-examination of the aqueous luminol chemiluminescence standard.
• Developmental stage-dependent collaboration between the TNF receptor-associated factor 6 and lymphotoxin pathways for B cell follicle organization in secondary lymphoid organs.
• Distribution of cerebello-olivary degeneration in idiopathic late cortical cerebellar atrophy: Clinicopathological study of four autopsy cases.
• Ductal carcinoma in situ: correlations between high-resolution magnetic resonance imaging and histopathology.
• Electric field-induced cubic phase in 4'-n-docosyloxy-3'-nitrobiphenyl-4-carboxylic acid.
• Enhancement of antigen-specific immunoglobulin g production in mice by co-administration of (L)-cystine and (L)-theanine.
• Identification and characterization of Asef2, a guanine-nucleotide exchange factor specific for Rac1 and Cdc42.
• Influence of bone osteocalcin levels on bone loss induced by ovariectomy in rats.
• Isolation and characterization of arsenite-resistant human epidermoid carcinoma KB cells.
• Low-valent niobium-mediated double activation of C-F/C-H bonds: fluorene synthesis from o-arylated alpha,alpha,alpha-trifluorotoluene derivatives.
• Ossification of the ligamentum flavum of the cervical spine.
• Purification of fibronectin.
• Purification of vitronectin.
• Risk Management and Measuring Productivity with POAS - Point of Act System. A Medical Information System as ERP (Enterprise Resource Planning) for Hospital Management.
• Stronger brønsted acids.
• Three-person game facilitates indirect reciprocity under image scoring.
• Thymidine phosphorylase activity associated with platelet-derived endothelial cell growth factor.
• [Acute Lymphoblastic Leukemia (ALL).]
• [Depth psychology and significance of religious symbols]
• [Management of adverse drug reaction on the patients with allergic diseases]
• [One point message of jgl2006 -the topics in the revised edition of the chapter of "risk factors"]
• [Prescription of rectangular contact lenses having two foci]
• [Results of survey conducted on perioperative chemotherapy and supportive care in primary breast cancer (JBCRG01)]
• [Studies in the restraining effect of sexual education on youthful criminals.]
• [Studies on the therapy of amblyopia by contact lenses. 3. Results of the prescription of contact lenses in children, with special reference to its application in amblyopia]
• [Vitamin K and bone quality]