Results 51 to 60 of about 390,999 (162)

Damage due to salt crystallization in porous media [PDF]

arXiv, 2009
We investigate salt crystallization in porous media that can lead to their disintegration. For sodium sulfate we show for the first time experimentally that when anhydrous crystals are wetted with water, there is very rapid growth of the hydrated form of sulfate in clusters that nucleate on anhydrous salt micro crystals.
arxiv  

Large-time behavior of a two-scale semilinear reaction-diffusion system for concrete sulfatation [PDF]

arXiv, 2013
We study the large-time behavior of (weak) solutions to a two-scale reaction-diffusion system coupled with a nonlinear ordinary differential equations modeling the partly dissipative corrosion of concrete (/cement)-based materials with sulfates. We prove that as $t\to\infty$ the solution to the original two-scale system converges to the corresponding ...
arxiv  

Carboxyl Carbon Quantum Dots: a Novel Type of Environmental-Friendly Scale Inhibitor [PDF]

arXiv, 2018
In this work, we demonstrate high inhibition efficiency of carboxyl carbon quantum dots (CCQDs) for the first time. The as-prepared CCQDs have excellent scale inhibition performance for calcium sulfate and barium sulfate. With static test of scale inhibition within temperature below 80 degrees, the anti-scaling efficiency can reach 100 % with low ...
arxiv  

X-rays, body measurements, and uronic acid excretion of calves heterozygous and homozygous normal for Snorter dwarfism [PDF]

, 1962
Several types of dwarfism have been recognized In beef cattle but none has, to date proposed an economic problem to the beef cattle Industry with the exception of the Snorter type.
Leeman, John Thomas
core   +1 more source

Molecular Insights into Yb(III) Speciation in Sulfate-Bearing Hydrothermal Fluids from X-ray Absorption Spectra Informed by ab initio Molecular Dynamics [PDF]

arXiv
Rare earth elements (REEs) are critical for advanced technologies, yet in hydrothermal aqueous solutions the molecular level details of their interaction with ligands that control their geochemical transport and deposition remain poorly understood. This study elucidates the coordination behavior of Yb(III) in sulfate-rich hydrothermal fluids using in ...
arxiv  

Raman Detection Threshold Measurements for Acetic Acid in Martian Regolith Simulant JSC-1 in the Presence of Hydrated Metallic Sulfates [PDF]

arXiv, 2018
Several measurements, including the data from the laser spectrometer in the Sample Analysis at Mars instrument suite on the Curiosity Rover in Gale crater, have measured seasonal variations in atmospheric methane at the 0.7 ppbv (parts per billion volume) level. As a result, models have been proposed to understand the methane production including novel
arxiv  

Multiphase buffering by ammonia sustains sulfate production in atmospheric aerosols [PDF]

arXiv
Multiphase oxidation of sulfur dioxide (SO2) is an important source of sulfate in the atmosphere. There are, however, concerns that protons produced during SO2 oxidation may cause rapid acidification of aerosol water and thereby quickly shut down the fast reactions favored at high pH.
arxiv  

In-situ crystallographic mapping constrains sulfate deposition and timing in Jezero crater, Mars [PDF]

arXiv
Late-stage Ca-sulfate-filled fractures are common on Mars. Notably, the Shenandoah formation in the western edge of Jezero crater preserves a variety of Ca-sulfate minerals in the fine-grained siliciclastic rocks explored by the Perseverance rover. However, the depositional environment and timing of the formation of these sulfates is unknown.
arxiv  

遺伝性蓄積性疾患の肝組織における酸性ムコ多糖体に関する研究 [PDF]

, 1980
Acidic glycosaminoglycans (AGAGs) content, composition and molecular weight distribution were determined in liver from childhood, fetus and patients with genetic lysosomal storage diseases (Hurler syndrome, Hunter syndrome severe form, Morquio syndrome,
阿保 克之
core   +1 more source

Impact of surfactant polydispersity on the phase and flow behaviour in water: the case of Sodium Lauryl Ether Sulfate [PDF]

arXiv
This study delves into the impact of molecular polydispersity on the phase behaviour of Sodium Lauryl Ether Sulfate (SLES) surfactant, aiming to deepen understanding of its implications for fundamental science and industrial applications.
arxiv