نتایج جستجو برای: elemental sulfur

تعداد نتایج: 52144  

Journal: :Physical Review B 2021

We use Density Functional Theory (DFT) and structure searching methods to show that the ground state of elemental sulfur is a Barium-IVa type incommensurate host-guest (HG) phase between $386$-$679$ GPa, becoming first group-VI element predicted possess such structure. Within HG phase, undergoes series transitions in which adjacent guest chains are not aligned but rather offset by different amo...

Journal: :تحقیقات آب و خاک ایران 0
حسین بشارتی سیداحمد سادات نوری امیربردیا نیکنیایی حمید ایران نژاد علی اکبری علیرضا فلاح نصرت آبادی

application of sulfur as a means of lowering soil ph (even if at micro sites) is one way to increase the availability of insoluble nutrients/ effectiveness of elemental sulfur in lowering soil ph depends on the activity of sulfur oxidizing bacteria especially, thiobacillus genus/ to evaluate the possibility of partially substituting sulfur along thiobacillus inoculum for phosphorus and micronut...

Journal: :Alternative medicine review : a journal of clinical therapeutic 2002
Stephen Parcell

Because the role of elemental sulfur in human nutrition has not been studied extensively, it is the purpose of this article to emphasize the importance of this element in humans and discuss the therapeutic applications of sulfur compounds in medicine. Sulfur is the sixth most abundant macromineral in breast milk and the third most abundant mineral based on percentage of total body weight. The s...

2011
Simón Beard Alberto Paradela Juan P. Albar Carlos A. Jerez

Production of sulfur globules during sulfide or thiosulfate oxidation is a characteristic feature of some sulfur bacteria. Although their generation has been reported in Acidithiobacillus ferrooxidans, its mechanism of formation and deposition, as well as the physiological significance of these globules during sulfur compounds oxidation, are currently unknown. Under oxygen-sufficient conditions...

2002
F. M. Miller G. L. Young M. von Seebach

This report presents the chemical and physical factors governing the generation of sulfur dioxide (SO2), its transformation into other sulfur compounds, and the removal of sulfur oxides within the cement kiln system. Sulfur in cement kilns is derived from both kiln feed and from the kiln fuel. The form of the sulfur dictates the location in the kiln where the SO2 generation takes place. Sulfur ...

2015
Samrat Roy Choudhury Arunava Goswami

The antifungal effects of orthorhombic (~10 nm; spherical) and monoclinic (~50 nm; tetrapod) sulfur nanoparticles (SNPs) were studied against the NADPH-dependent glutathione reductase (GR) mediated xenobiotic detoxification system (GSH-GSSG) in filamentous fungi (Aspergillus niger as a model organism). Both the SNPs induced significant reduction in fungal growth and spore formation, and also in...

2013
Gianfranco Carotenuto Valentina Romeo Sergio De Nicola Luigi Nicolais

Graphite nanoplatelets (GNPs) react with elemental sulfur to provide a mechanically stable, spongy material characterized by good electrical conductivity and high surface development; such unique property combination makes these novel nanostructured materials very useful for applications in different technological fields. The carbon-sulfur reaction can be accurately investigated by thermal anal...

Journal: :Applied and environmental microbiology 1999
Otte Kuenen Nielsen Paerl Zopfi Schulz Teske Strotmann Gallardo Jorgensen

Filamentous sulfur bacteria of the genus Thioploca occur as dense mats on the continental shelf off the coast of Chile and Peru. Since little is known about their nitrogen, sulfur, and carbon metabolism, this study was undertaken to investigate their (eco)physiology. Thioploca is able to store internally high concentrations of sulfur globules and nitrate. It has been previously hypothesized tha...

2014
N. Rademacher L. Bayarjargal W. Morgenroth J. D. Bauer V. Milman B. Winkler

The decomposition of SF6 in the presence of glassy carbon was induced in laser heated diamond anvil cells at 10 to 11GPa and 2000 to 2500K. The reaction products were characterised by synchrotron X-ray diffraction, including high pressure pair distribution function analysis, and micro-Raman spectroscopy combined with atomistic model calculations. The decomposition leads to elemental amorphous h...

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