Results 51 to 60 of about 1,206,922 (429)
Sulfur phase and sulfur removal in high sulfur-containing bauxite [PDF]
Transactions of Nonferrous Metals Society of China, 2011 Abstract The sulfur phase in high sulfur-containing bauxite was studied by an X-ray diffraction analysis and a chemistry quantitative analysis. The methods for the removal of different shaped sulfur were also discussed. The results show that sulfur phases in high sulfur-containing bauxites exist in the main form of sulfide sulfur (pyrite) or sulfate ...
Qiao-ling Xie +3 more
openaire +1 more source
Известия Томского политехнического университета: Инжиниринг георесурсов, 2019 The relevance of the research is determined by the necessity of reproduction and expansion of oilfields area resource base in the Krasnoyarsk region by involving in the development of oils and condensates of complex chemical composition containing ...
Alexander K. Bitner +3 more
doaj +1 more source
Boundaries of photosynthesis: adaptations of carbon fixation in extreme environments
FEBS Open Bio, EarlyView.Photosynthesis faces challenges from environmental extremes of temperature, pH, and salinity, limiting gas diffusion, modifying membrane fluidity, and destabilizing photochemical and biochemical reactions. Photosynthetic organisms have evolved unique adaptations overcoming these stresses and maintaining their photosynthetic activity.
Pere Aguiló‐Nicolau +3 more
wiley +1 more source
Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system [PDF]
Nature, 2015 A superconductor is a material that can conduct electricity without resistance below a superconducting transition temperature, Tc. The highest Tc that has been achieved to date is in the copper oxide system: 133 kelvin at ambient pressure and 164 kelvin ...
A. Drozdov +4 more
semanticscholar +1 more source
Stabilization of S3O4 at High Pressure-Implications for the Sulfur Excess Paradox [PDF]
arXiv, 2021 The geological conundrum of sulfur excess refers to the finding that predicted amounts of sulfur, in the form of SO2, discharged in volcanic eruptions much exceeds the sulfur available for degassing from the erupted magma. Exploring the source of the excess sulfur has been the subject of considerable interest.
arxiv
Analysis of Sulfur Poisoning on a PEM Fuel Cell Electrode [PDF]
Electrochimica Acta, 55(20), 5683-5694, 2010, 2011 The extent of irreversible deactivation of Pt towards hydrogen oxidation reaction (HOR) due to sulfur adsorption and subsequent electrochemical oxidation is quantified in a functional PEM fuel cell. At 70 {\deg}C, sequential hydrogen sulfide (H2S) exposure and electrochemical oxidation experiments indicate that as much as 6% of total Pt sites are ...
arxiv +1 more source
Regulation of dissimilatory sulfur oxidation in the purple sulfur bacterium Allochromatium vinosum [PDF]
, 2011 In the purple sulfur bacterium Allochromatium vinosum, thiosulfate oxidation is strictly dependent on the presence of three periplasmic Sox proteins encoded by the soxBXAK and soxYZ genes.
Dahl, Christiane +2 more
core +3 more sources
HPDL Variant Type Correlates With Clinical Disease Onset and Severity
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Recently, a mitochondrial encephalopathy due to biallelic HPDL variants was described, associated with a broad range of clinical manifestations ranging from severe, infantile‐onset neurodegeneration to adolescence‐onset hereditary spastic paraplegia. HPDL converts 4‐hydroxyphenylpyruvate acid (4‐HPPA) into 4‐hydroxymandelate (4‐HMA),
Eun Hye Lee +19 more
wiley +1 more source
Ensuring Nutritious Food Under Elevated CO2 Conditions: A Case for Improved C4 Crops
Frontiers in Plant Science, 2020 Global climate change is a challenge for efforts to ensure food security for future generations. It will affect crop yields through changes in temperature and precipitation, as well as the nutritional quality of crops.
Timothy O. Jobe +3 more
doaj +1 more source
On the sulfur doping of gamma-graphdiyne: A Molecular Dynamics and DFT study [PDF]
arXiv, 2020 Recently, an experimental study developed an efficient way to obtain sulfur-doped gamma-graphdiyne. This study has shown that this new material could have promising applications in lithium-ion batteries, but the complete understanding of how the sulfur atoms are incorporated into the graphdiyne network is still missing.
arxiv