Search Results - "Hoffmann, M. R."

A Paramagnetic Bonding Mechanism for Diatomics in Strong Magnetic Fields by Lange, Kai K., Tellgren, E. I., Hoffmann, M. R., Helgaker, T.

“…Elementary chemistry distinguishes two kinds of strong bonds between atoms in molecules: the covalent bond, where bonding arises from valence electron pairs…”
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Electrohydraulic Discharge and Nonthermal Plasma for Water Treatment by Locke, B. R, Sato, M, Sunka, P, Hoffmann, M. R, Chang, J.-S

“…The application of strong electric fields in water and organic liquids has been studied for several years, because of its importance in electrical transmission…”
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Acid Dissociation versus Molecular Association of Perfluoroalkyl Oxoacids: Environmental Implications by Cheng, Jie, Psillakis, Elefteria, Hoffmann, M. R, Colussi, A. J

“…Perfluorooctanoate (PFO) and perfluorooctanesulfonate (PFOS) surfactant anions, once released, may rapidly reach remote regions. This phenomenon is puzzling…”
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Experimental Anion Affinities for the Air/Water Interface by Cheng, Jie, Vecitis, Chad D, Hoffmann, M. R, Colussi, A. J

“…Anion affinities, γ X − , for the aerial interface of aqueous (Br- + NO3 - + I- + SCN- + BF4 - + ClO4 -) solutions are determined by electrospray ionization…”
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Simultaneous Detection of Cysteine Sulfenate, Sulfinate, and Sulfonate during Cysteine Interfacial Ozonolysis by Enami, Shinichi, Hoffmann, M. R, Colussi, A. J

“…Sulfenic acids (RSOH) are reactive intermediates in the oxidation of protein cysteines. Among cysteine oxoforms, RSOH represent redox-reversible species that…”
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Acidity enhances the formation of a persistent ozonide at aqueous ascorbate/ozone gas interfaces by Enami, Shinichi, Hoffmann, M.R, Colussi, A.J

“…The pulmonary epithelium, like most aerial biosurfaces, is naturally protected against atmospheric ozone (O₃) by fluid films that contain ascorbic acid (AH₂)…”
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Optical Absorptivity versus Molecular Composition of Model Organic Aerosol Matter by Rincón, Angela G, Guzmán, Marcelo I, Hoffmann, M. R, Colussi, A. J

“…Aerosol particles affect the Earth’s energy balance by absorbing and scattering radiation according to their chemical composition, size, and shape. It is…”
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OH Radical-Initiated Chemistry of Isoprene in Aqueous Media. Atmospheric Implications by Kameel, F. Rifkha, Hoffmann, M. R, Colussi, A. J

“…The fate of isoprene (2-methyl-1,3-butadiene, ISO) emissions into the atmosphere is not fully understood. Increasing awareness that ISO is only partially…”
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Photoinduced Oligomerization of Aqueous Pyruvic Acid by Guzmán, M. I, Colussi, A. J, Hoffmann, M. R

“…The 320 nm-band photodecarboxylation of aqueous pyruvic acid (PA), a representative of the α-oxocarboxylic acids widely found in the atmospheric aerosol,…”
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Fenton Oxidation of Gaseous Isoprene on Aqueous Surfaces by Kameel, F. Rifkha, Riboni, F, Hoffmann, M. R, Enami, Shinichi, Colussi, A. J

“…We report that gaseous isoprene ISO(g) is oxidized into soluble species on the surface of aqueous acidic FeCl2 solutions simultaneously exposed to H2O2(g). In…”
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Homogeneous Reduction of CO2 by Photogenerated Pyridinyl Radicals by Riboni, Francesca, Selli, Elena, Hoffmann, M. R, Colussi, A. J

“…We report that 1-hydropyridinyl radicals (1-PyH•) photogenerated in solution react with dissolved CO2 en route to its 2e– reduction into carboxylic acids. The…”
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Enrichment Factors of Perfluoroalkyl Oxoanions at the Air/Water Interface by Psillakis, Elefteria, Cheng, Jie, Hoffmann, M. R, Colussi, A. J

“…The refractory, water-bound perfluoro-n-alkyl carboxylate F(CF2) n CO2 − and sulfonate F(CF2) n SO3 − surfactant anions reach remote locations by mechanisms…”
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Global Inorganic Source of Atmospheric Bromine by Enami, S, Vecitis, C. D, Cheng, J, Hoffmann, M. R, Colussi, A. J

“…A few bromine molecules per trillion (ppt) causes the complete destruction of ozone in the lower troposphere during polar spring and about half of the losses…”
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Anion-Catalyzed Dissolution of NO2 on Aqueous Microdroplets by Yabushita, A, Enami, S, Sakamoto, Y, Kawasaki, M, Hoffmann, M. R, Colussi, A. J

“…Fifty-seven years after NO x (NO + NO2) were identified as essential components of photochemical smog, atmospheric chemical models fail to correctly predict…”
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Ozonolysis of Uric Acid at the Air/Water Interface by Enami, Shinichi, Hoffmann, M. R, Colussi, A. J

“…Uric acid (UA) epoxide, peroxide, and ozonide species produced in aqueous UA microdroplets exposed to O3(g) are detected by online mass spectrometry within ∼1…”
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Molecular Control of Reactive Gas Uptake “on Water” by Enami, Shinichi, Hoffmann, M. R, Colussi, A. J

“…Reactive gas uptake on environmentally realistic aqueous surfaces is expected to be affected by a combination of multiple interactions. This issue is herein…”
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Ozone Oxidizes Glutathione to a Sulfonic Acid by Enami, Shinichi, Hoffmann, M. R, Colussi, A. J

“…Biosurfaces are universally covered with fluid microfilms containing reduced glutathione (GSH) and other antioxidants whose putative roles include the…”
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Electrospray Mass Spectrometric Detection of Products and Short-Lived Intermediates in Aqueous Aerosol Microdroplets Exposed to a Reactive Gas by Enami, S, Vecitis, C. D, Cheng, J, Hoffmann, M. R, Colussi, A. J

“…The intermediates ISO3 - (m/z = 207) and IS2O3 - (m/z = 239) generated in aqueous (NaI/Na2S2O3) microdroplets traversing dilute O3 gas plumes are detected via…”
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Acidity of Frozen Electrolyte Solutions by Robinson, Carmen, Boxe, C. S, Guzmán, M. I, Colussi, A. J, Hoffmann, M. R

“…Ice is selectively intolerant to impurities. A preponderance of implanted anions or cations generates electrical imbalances in ice grown from electrolyte…”
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Photolysis of pyruvic acid in ice: Possible relevance to CO and CO2 ice core record anomalies by Guzmán, M. I., Hoffmann, M. R., Colussi, A. J.

“…The abnormal spikes detected in some CO and CO2 polar ice core records indicate persistent chemical activity in glacial ice. Since CO and CO2 spikes are…”
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