Results 31 to 40 of about 730,264 (333)
Nitrogenase: A nucleotide-dependent molecular switch [PDF]
, 1994 In the simplest terms, the biological nitrogen cycle is the reduction of atmospheric dinitrogen (N2) to ammonia with the subsequent reoxidation ammonia to dinitrogen (1).
Howard, James B., Rees, Douglas C.
core +1 more source
Carbon dioxide electrochemical reduction by copper nanoparticles/ionic liquid-based catalytic inks
Frontiers in Environmental ChemistryThe development of copper nanoparticle (CuNP)-based catalysts for the electrochemical reduction of carbon dioxide (ECO2-R) offers a promising approach to enhance its transformation into other industrially significant compounds.
Valeria Gazzano +13 more
doaj +1 more source
EnergiesPhotocatalysis, a promising semiconductor-based technology activated by free and eternal solar energy, has great potential for addressing environmental remediation and energy conversion challenges.
Cheng Zhang, Na Li, Guangqi An
doaj +1 more source
Targeted metabolomics reveals novel diagnostic biomarkers for colorectal cancer
Molecular Oncology, EarlyView.This study employed targeted metabolomic profiling to identify 302 distinct metabolites present in platelet‐rich plasma (PRP), revealing aberrant metabolic profiles amongst individuals diagnosed with colorectal cancer (CRC). Compared to carcinoembryonic antigen (CEA) and cancer antigen 19‐9 (CA199), our metabolite panel showed improved sensitivity ...
Zuojian Hu +7 more
wiley +1 more source
Combined toxic effects of nitrite and ammonia on life history traits of Daphnia pulex
Frontiers in Environmental Science, 2022 Nitrite and ammonia are two of the most common toxic nitrogenous pollutants in aquatic ecosystem, which can pose a serious threat to the health of aquatic organisms.
Bo Yu +4 more
doaj +1 more source
On the robustness of the ammonia thermometer [PDF]
, 2009 Ammonia inversion lines are often used as probes of the physical conditions in the dense ISM. The excitation temperature between the first two para metastable (rotational) levels is an excellent probe of the gas kinetic temperature. However, the calibration of this ammonia thermometer depends on the accuracy of the collisional rates with H2.
arxiv +1 more source
An in situ XAS study of the cobalt rhenium catalyst for ammonia synthesis [PDF]
, 2018 A cobalt rhenium catalyst active for ammonia synthesis at 400 °C and ambient pressure was studied using in situ XAS to elucidate the reducibility and local environment of the two metals during reaction conditions.
Granlund Kirste, Karsten +6 more
core +3 more sources
β‐Catenin/c‐Myc Axis Modulates Autophagy Response to Different Ammonia Concentrations
Advanced Biology, Volume 9, Issue 3, March 2025.Ammonia, detoxified by the liver into urea and glutamine, impacts autophagy differently at varying levels. Low ammonia activates autophagy via c‐Myc and β‐catenin, while high levels suppress it. Using Huh7 cells and Spf‐ash mice, c‐Myc's role in cytoprotective autophagy is revealed, offering insights into hyperammonemia and potential therapeutic ...
S. Sergio +11 more
wiley +1 more source
Small StructuresTransition metal nitrides (TMNs) electrocatalysts experience rapid performance degradation during oxygen evolution reaction (OER) due to severe and irreversible electrochemical reconstruction, impeding their practical application in electrochemical water
Shihao Wang +4 more
doaj +1 more source
MATEC Web of Conferences, 2017 Ammonia has a very significant value in the fertilizer industry where it was being synthesized via Haber-Bosch process in the early 19th century. As the process utilize high operating conditions, it imposes high capital cost and is an energy-consuming ...
Rashidi Amirah +2 more
doaj +1 more source