Article: NH^sub 4^^sup +^ Currents across the Peribacteroid Membrane of Soybean. Macroscopic and Microscopic Properties, Inhibition by Mg^sup 2+^, and Temperature Dependence Indicate a SubpicoSiemens Channel Finely Regulated by Divalent Cations1

Article: Detailed Mechanism for AmtB Conducting NH^sup ...
Biophysical Journal;  February 1, 2007 ;     700+ words ... ... conducts NH^sup +^^sub 4^/NH^sub 3^ into the cytoplasm was investigated ... revealed that the neutral molecule, NH^sub 3^, passes automatically through ... as a one-way valve for passage of NH^sub 3^ is not determined by the cytoplasmic ...

Article: Gated Cardiac ^sup 13^N-NH^sub 3^ PET for ...
The Journal of Nuclear Medicine;  December 1, 2005 ;     700+ words ... ... sup 13^N-ammonia (^sup 13^N-NH^sub 3^) PET for the assessment of cardiac ... Methods: ECG-gated ^sup 13^N-NH^sub 3^ and ^sup 18^F-FDG scans were ... viability. For both ^sup 13^N-NH^sub 3^ and ^sup 18^F-FDG studies ...

Article: Tonoplast Intrinsic Proteins AtTIP2;1 and AtTIP2;3 Facilitate ...
Plant Physiology;  February 1, 2005 ;     700+ words ... ... ammonium. (The term ammonium is used to denote both NH^sub 3^ and NH^sub 4^^sup +^ and chemical symbols are used when specificity ... can mediate the extracytosolic transport of methyl-NH^sub 2^ and NH^sub 3^ across the tonoplast membrane ...

Article: POLYHEDRAL MONOCARBABORANE CHEMISTRY. FUNCTIONALITY AND ...
Collection of Czechoslovak Chemical Communications;  November 1, 2005 ;     700+ words ... ... Reaction of NC^sub 5^H^sub 4^-2-NH^sub 2^ with the [6-Ph-nido-6 ... NC^sub 5^H^sub 4^-2-NH^sub 2^)-arachno-6-CB^sub 9 ... NC^sub 5^H^sub 4^-2-NH^sub 2^)-closo-1-CB^sub 9^H ...

Article: Regulation of NH^sub 4^^sup +^ Transport by ...
Plant Physiology;  April 1, 2007 ;     700+ words ... ... function directly in the high-affinity NH^sub 4^^sup +^ acquisition from soil ... functions as a comparatively low-affinity NH^sub 4^^sup +^ transporter. Mutations ... putative phosphorylation site, impair NH^sub 4^^sup +^ transport activity ...

Article: Monitoring NH^sub 3^, N^sub 2^O, CO2 and ...
Compost Science & Utilization;  October 1, 2008 ;     700+ words ... ... aim of this study was to quantify the NH^sub 3^, N^sub 2^O, CO2 and CH ... 0, 11 and 27. Gaseous emissions (NH^sub 3^, N^sub 2^O, CH^sub 4 ... nitrogen loss (mainly in the form of NH^sub 3^) of 10.5 % and 9 % of the initial ...

Article: Reproducibility of Measurements of Regional Myocardial Blood Flow ...
The Journal of Nuclear Medicine;  July 1, 2006 ;     700+ words ... ... sub 2^^sup 15^O and ^sup 13^NH^sub 3^ are widely used in clinical and ... sup 15^O MBF and PET ^sup 13^NH^sub 3^ MBF in an animal model of chronic ... 2^^sup 15^O and PET ^sup 13^NH^sub 3^. Attenuation-corrected images ...