Results 21 to 30 of about 1,013,250 (360)
Frontiers in Microbiology, 2013 Ammonia serves as the source of energy and reductant and as a signaling molecule that regulates gene expression in obligate ammonia-oxidizing chemolithotrophic microorganisms. The gammaproteobacterium, Nitrosococcus oceani, was the first obligate ammonia-
Lisa Y Stein +2 more
doaj +1 more source
mSystems, 2022 Mineral nitrogen (N) is a major nutrient showing strong fluctuations in the environment due to anthropogenic activities. The acquisition and translocation of N to forest trees are achieved mainly by highly diverse ectomycorrhizal fungi (EMF) living in ...
Carmen Alicia Rivera Pérez +4 more
doaj +1 more source
Modeling Residence Time Distribution (RTD) Behavior in a Packed-Bed Electrochemical Reactor (PBER)
International Journal of Chemical Engineering, 2019 This paper focuses on understanding the electrolyte flow characteristics in a typical packed-bed electrochemical reactor using Residence Time Distribution (RTD) studies.
Sananth H. Menon, G. Madhu, Jojo Mathew
doaj +1 more source
Frontiers in Marine Science, 2021 Ammonium is a fundamental nutrient for phytoplankton growth in seawater and is a key component of the microbial loop. Ammonium measured in parallel with other nutrients is crucial in understanding the small temporal scale changes in oceanographic ecology.
Christine Rees +9 more
doaj +1 more source
Frontiers in Plant Science, 2021 Nitrate and ammonium are the main nitrogen sources in agricultural soils. In the last decade, ammonium (NH4+), a double-sided metabolite, has attracted considerable attention by researchers.
María Begoña González-Moro +8 more
doaj +1 more source
Endophytic Expression of nif Genes of Azoarcus sp. Strain BH72 in Rice Roots
Molecular Plant-Microbe Interactions, 1999 Transcriptional fusions of gusA and gfp to the nifH gene as well as immunogold labeling with antibodies against the iron protein of nitrogenase revealed high nitrogenase gene expression levels of the endophyte Azoarcus sp.
Tanja Egener +2 more
doaj +1 more source
DIFFERENT NITRATE AND AMMONIUM LEVELS MEDIA ON CHANGES OF NITROGEN ASSIMILATION ENZYMES IN RICE
Biovalentia: Biological Research Journal, 2021 Nitrogen (N) is an important nutrient for the growth and development of rice plants, required in large quantity and often limiting factor of rice yields.
Tri Handoyo +2 more
doaj +1 more source
THE TORSIONAL VIBRATIONS OF THE AMMONIUM IONS IN AMMONIUM IODIDE AND AMMONIUM BROMIDE [PDF]
Chemistry Letters, 1973 Abstract The far-infrared spectra of NH4I and NH4Br have been measured at temperatures of −223 to −53 °C. The torsional vibrations of the NH4+ ions in the phase III crystalline salts were observed at 301 cm−1 for NH4I at −223 °C and at 348 cm−1 for NH4Br at −166 °C.
openaire +2 more sources
Frontiers in Marine Science, 2018 Algal biofuel production requires an input of synthetic nitrogen fertilizer. Fertilizer synthesized via the Haber-Bosch process produces CO2 as a waste by-product and represents a substantial financial and energy investment.
Jacob Dums +6 more
doaj +1 more source
Ammonium perchlorate and ammonium perchlorate-binder sandwich combustion [PDF]
12th Aerospace Sciences Meeting, 1974 order of 300 \i in width. The deflagration of all three burners appeared laminar, with a definite temperature peak above the center of the burner. The PP-COMM AP had a scalloped surface which accounted for a more unsteady appearance of the gas flow above the deflagrating AP. A yellow-green zone was visible within the SC-UHP AP extending from the burner
Murphy, J. L., Netzer, David Willis
openaire +3 more sources