Results 71 to 80 of about 154,019 (297)

Novel method for minimizing reactant in the synthesis of sodium silicate solution from mixed-phase quartz-amorphous SIO2

Case Studies in Chemical and Environmental Engineering
In this research, sodium silicate solution was synthesized by reacting silica from inorganic materials with NaOH. The determination of the amount of NaOH used in the reaction is calculated by considering the quantity of the crystalline (quartz) and ...
Eni Febriana, Wahyu Mayangsari, Sigit Dwi Yudanto, Eko Sulistiyono, Murni Handayani, Florentinus Firdiyono, Ahmad Maksum, Agus Budi Prasetyo, J.W. Soedarsono   +8 more
doaj   +1 more source

Dust evolution in protoplanetary disks around Herbig Ae/Be stars - The Spitzer view

, 2010
In this paper we present mid-infrared spectra of a comprehensive set of Herbig Ae/Be stars observed with the Spitzer Space Telescope. The signal-to-noise ratio of these spectra is very high, ranging between about a hundred and several hundreds.
Acke, B., Ancker, M. E. van den, Bouwman, J., Dominik, C., Henning, Th., Juhasz, A., Meeus, G., Min, M., Tielens, A. G. G. M., Waters, L. B. F. M.   +9 more
core   +2 more sources

Davis-Beirut reaction: route to thiazolo-, thiazino-, and thiazepino-2H-indazoles. [PDF]

, 2014
Methods for the construction of thiazolo-, thiazino-, and thiazepino-2H-indazoles from o-nitrobenzaldehydes or o-nitrobenzyl bromides and S-trityl-protected 1°-aminothioalkanes are reported.
Farber, Kelli M, Haddadin, Makhluf J, Kurth, Mark J   +2 more
core   +2 more sources

Disordered Carbon Shells Enable Shape Dependent Fluorescence Enhancement in Nanodiamond Quantum Sensors Revealed by Correlative TEM–Fluorescence Microscopy

Advanced Functional Materials, EarlyView.
Molten KNO2 treatment induces a lowrefractive index disordered carbon shell on fluorescent nanodiamonds, enhancing fluorescence emission while preserving spin coherence. Machine learningassisted correlative TEMPL enables direct single‐particle resolution of this enhancement relative to air‐oxidized nanodiamonds of similar morphology, establishing a ...
Parkarsh Kumar, Tom Vaillant, Mehran Kianinia, Haotian Wen, Adam Stewart, Peter J. Reece, Hugues A. Girard, Jean‐Charles Arnault, Huan‐Cheng Chang, Igor Aharonovich, Shery L. Y. Chang   +10 more
wiley   +1 more source

Nanoporous smartPearls for dermal application – Identification of optimal silica types and a scalable production process as prerequisites for marketed products

Beilstein Journal of Nanotechnology, 2019
smartPearls are a dermal delivery system for poorly soluble active agents, consisting of nanoporous silica particles loaded with a long-term stable, amorphous active agent in its mesopores (2–50 nm).
David Hespeler, Sanaa El Nomeiri, Jonas Kaltenbach, Rainer H. Müller   +3 more
doaj   +1 more source

Direct Experimental Evidence for Differing Reactivity Alterations of Minerals following Irradiation: The Case of Calcite and Quartz [PDF]

, 2015
Concrete, a mixture formed by mixing cement, water, and fine and coarse mineral aggregates is used in the construction of nuclear power plants (NPPs), e.g., to construct the reactor cavity concrete that encases the reactor pressure vessel, etc.
Bauchy, Mathieu, Field, Kevin G., Kumar, Aditya, Pape, Yann Le, Pignatelli, Isabella, Sant, Gaurav, Wang, Bu, Yu, Yingtian   +7 more
core   +3 more sources

Elucidating the Role of Surface Ligands on the Oxidative Etching of Au Bipyramids During Photothermia Using Liquid Cell Transmission Electron Microscopy

Advanced Functional Materials, EarlyView.
Gold bipyramids can act as efficient plasmonic nanoheaters, but they often reshape during laser heating. This study shows that oxygen nanobubbles drive oxidative etching and that surface ligands control stability. CTAB‐ and citrate‐coated particles blunt and lose optical performance, whereas polystyrene sulfonate preserves shape and heating by ...
Irene López‐Sicilia, Valentina Girelli Consolaro, Sophie Marbach, Nancy Rahbany, Grégoire Petit, Ovidiu Ersen, Juan J. Giner‐Casares, Ali Abou‐Hassan   +7 more
wiley   +1 more source

Phase Transformation of Silicon and Silica During Ball Milling

Journal of Advanced Materials in Engineering, 2010
In the present study phase transformation of silicon and silica during milling in different atmospheres was investigated. The silicon powder was subjected to high energy ball milling in ammonia (25%) atmosphere.
M. Babashahi, M.H.Enayati, M. Salehi, A. Monshi   +3 more
doaj  

Synthesis of Hierarchical Zeolites with Morphology Control: Plain and Hollow Spherical Beads of Silicalite-1 Nanosheets

Molecules, 2020
Binderless pure silica zeolites (zeosils) spheres and hollow spheres with a diameter of 20 µm composed of silicalite-1 nanosheets particles were prepared by pseudomorphic transformation of spherical silica beads using different temperatures (110, 130 ...
Kassem Moukahhal, Bénédicte Lebeau, Ludovic Josien, Anne Galarneau, Joumana Toufaily, Tayssir Hamieh, T. Jean Daou   +6 more
doaj   +1 more source

Evolution of the structure of amorphous ice - from low-density amorphous (LDA) through high-density amorphous (HDA) to very high-density amorphous (VHDA) ice

, 2005
We report results of molecular dynamics simulations of amorphous ice for pressures up to 22.5 kbar. The high-density amorphous ice (HDA) as prepared by pressure-induced amorphization of Ih ice at T=80 K is annealed to T=170 K at various pressures to ...
D. Donadio, Lindahl E., M. Parrinello, R. Martoňák   +3 more
core   +1 more source