Nitrogen retention in soil organic matter (SOM) is a key process influencing the accumulation and loss of N in forest ecosystems, but the rates and mechanisms of inorganic N retention in soils are not well understood. The primary objectives of this study were to compare ammonium (NH4 1 ), nitrite (NO2 ), and nitrate (NO3 ) immobilization among soils developed under different tree species in the...

A rapid, senstive method for NO2 analysis utilizing the chemiluminescence reaction of NO and O3 is provided by the use of the Scott Model 125 Chemiluminescense NO/NOI, Analyzer. Measurement of NO2 in the air sample by reducing it to NO by passage tgrough a converter before it enters the reaction chamber. Thermal converter will also convert, partially or completly, NH3 (and other N-componds) dep...

Retrievals of tropospheric nitrogen dioxide (NO2) from the Ozone Monitoring Instrument (OMI) are subject to errors in the treatments of aerosols, surface reflectance anisotropy, and vertical profile of NO2. Here we quantify the influences over China via an improved retrieval process. We explicitly account for aerosol optical effects (simulated by nested GEOS-Chem at 0.667 long. × 0.5 lat. and c...

Dr Townsend graduated with Honours from the University of Queensland in 1989. During his anaesthesia training in Brisbane, he was awarded both the Renton and Cecil Grey Prizes. While a staff specialist anaesthetist at Prince Charles Hospital in Brisbane from 1999 to 2001 he gained experience working with cardiac surgical patients and aspects of managing shock states with circulatory assist devi...

Primary cultured monolayers of rat Type II pneumocytes were used to investigate the effects of NO2 on alveolar epithelial barrier properties. Such monlayers form fluid-filled domes which are thought to result from active solute transport from medium to substratum, with water following passively. Using dome formation as a transport marker, 5-day-old cultures were directly exposed to 30 ppm NO2 i...

Hans-Jacob Bangstada, Thomas Danneb, Larry Deebc, Przemyslawa Jarosz-Chobotd, Tatsuhiko Urakamie and Ragnar Hanasf aDepartment of Pediatrics, Oslo University Hospital, Ullevål, Norway bKinderkrankenhaus auf der Bult, Diabetes-Zentrum fur Kinder und Judendliche, Hannover, Germany cDepartment of Pediatrics, University of Florida College of Medicine, Tallahassee, FL, USA dDepartment of Pediatric E...

Dong Chen,1,2 Taizo Sasaki,1 Jie Tang,3 and Lu-Chang Qin4 1Computational Materials Science Center, National Institute for Materials Science, Tsukuba 305-0047, Japan 2Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China 31D Nanomaterials Research Group, National Institute for Materials Science, T...

a Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA b Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan c Department of Physics, Konan University, Kobe 568-8501, Japan d Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen, The Netherlands e Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578, Japan f ...

Surface-adsorbed organics can alter the chemistry of tropospheric aerosols thereby impacting photochemical cycles and altering aerosol properties. The nature of the surface can also influence the chemistry of the surface-adsorbed organic. We employed diffuse reflectance infrared spectroscopy (DRIFTS) to monitor the adsorption of gaseous catechol on several tropospheric aerosol surrogates and to...

We report on the development of a high-sensitivity detection system for measuring atmospheric NO2 using a laser-induced fluorescence (LIF) technique around 440 nm. A tunable broad-band optical parametric oscillator laser pumped by the third harmonic of a Nd:YAG laser is used as a fluorescence excitation source. The laser wavelength is tuned at peak and bottom wavelengths around 440 nm alternati...