Results 81 to 90 of about 43,907 (278)

Selective Analytical Production of 1-Hydroxy-3,6-dioxabicyclo[3.2.1]octan-2-one from Catalytic Fast Pyrolysis of Cellulose with Zinc-Aluminium Layered Double Oxide Catalyst

BioResources, 2015
Zinc-aluminium layered double oxide (Zn-Al-LDO) catalysts derived from layered double hydroxides (LDHs) were prepared and used for the catalytic fast pyrolysis of cellulose to selectively produce 1-hydroxy-3,6-dioxabicyclo[3.2.1]octan-2-one (LAC), which ...
Zhi-Bo Zhang, Qiang Lu, Xiao-Ning Ye, Wen-Tao L, Bin Hu, Chang-Qing Dong   +5 more
doaj   +1 more source

Epoxy resin-based sealers modified with clay nanoparticles: Evaluation of their physicochemical and mechanical properties. [PDF]

Eur J Oral Sci
Abstract Epoxy resin‐based sealers are commonly used in endodontic treatment due to their superior physicochemical properties. Therefore, it is important to utilize these materials by enhancing their properties. Nonetheless, several of their properties remain suboptimal, including the relatively prolonged setting time, the moderate yet clinically ...
Dimopoulos F, Kodonas K, Nikolaidis AK, Koulaouzidou EA, Economides N, Gogos C.   +5 more
europepmc   +2 more sources

Reduced adsorption of caesium on clay minerals caused by various humic substances [PDF]

, 1999
The effect of the addition of various humic substances on the adsorption of caesium on two mineral clays has been studied. All measurements were carried out in dilute suspension under controlled conditions of temperature and ionic strength.
Dumat, Camille, Staunton, S.
core   +4 more sources

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

CARACTERISTICILE STRATULUI DUBLU ELECTRIC ÎN PROXIMITATEA SUPRAFEŢEI LATERALE A MONTMORILONITULUI

Studia Universitatis Moldaviae: Stiinte reale si ale naturii, 2016
Caracteristicile stratului dublu în proximitatea suprafeţei laterale a montmorilonitului au fost estimate aplicând mo­de­lul stratului dublu în viziunea conceptului Gouy-Chapman, modelul „formarea complecşilor-stratul difuz” şi modelul delimitării ...
Vasile RUSU
doaj  

Acylation of aromatic alcohols and phenols over InCl3/montmorillonite K-10 catalysts

Journal of Chemical Sciences, 2004
Montmorillonite K-10 clay supported InCl 3 is a highly active catalyst for the acylation of aromatic alcohols and phenols with different acyl chlorides. This catalyst can be reused in reactions a number of times without very significant loss of catalytic activity.
Vasant R. Choudhary, Kailash Y. Patil, Suman K. Jana   +2 more
openaire   +2 more sources

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Hydrophobic eutectic solvent‐engineered membranes for highly permeable, selective, and antifouling pharmaceutical removal from municipal wastewater

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Single‐step incorporation of a hydrophobic deep eutectic solvent (HDES) into polyethersulfone ultrafiltration membranes via non‐solvent induced phase separation creates selective, antifouling membranes for pharmaceutical removal. The HDES nanodomains enhance permeability, electrostatic interactions, and adsorption affinity, enabling efficient and ...
Anjali Goyal, Tarek Lemaoui, Mahendra Kumar, Ahmad S. Darwish, Ali Zerriouh, Fawzi Banat, Hassan A. Arafat, Shadi W. Hasan, Inas M. AlNashef   +8 more
wiley   +1 more source

The reaction of 1-tetralones with thallium trinitrate supported on clay: ring contraction vs a-oxidation

Journal of the Brazilian Chemical Society, 2001
The reaction of a series of 1-tetralones with thallium trinitrate supported on Montmorillonite K-10 clay led to products of ring contraction (methyl indan-1-carboxylates) and/or alpha-oxidation (2-methoxy-1-tetralones), in variable yields.
Ferraz Helena M. C., Silva Jr. Luiz F., Aguilar Andrea M., Vieira Tiago O.   +3 more
doaj  

Benzimidazolium Surfactants for Modification of Clays for Use with Styrenic Polymers [PDF]

, 2007
Nanocomposites of polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS) and high impact polystyrene (HIPS) were prepared with two new homologous benzimidazolium surfactants used as organic modifications for the clays.
Costache, Marius C., Gupta, Rakesh K., Heidecker, Matthew, Manias, Evangelos, Wilkie, Charles A.   +4 more
core   +1 more source