Results 31 to 40 of about 140,930 (300)

Effect of Zn/Co initial preparation ratio in the activity of Double Metal Cyanide catalysts for propylene oxide and CO2 copolymerization [PDF]

, 2017
Zn-Co double metal cyanide (DMC) catalysts were prepared by varying the initial amounts of ZnCl2 to analyze the influence of method of preparation on the different copolymerization parameters.
Andrés Iglesias, Cristina, Fernández, Adrian, Galdámez Peña, José Román, García Serna, Juan, Pinilla de Dios, María, Salmi, Tapio   +5 more
core   +2 more sources

Elemental composition of atmospheric particulate matter during 2006 wet season at a rural background site in Tanzania [PDF]

, 2010
The elemental composition of PM10 was studied during 2006 wet season in a rural background site of Morogoro, Tanzania. A Gent PM10 stacked filter unit sampler with coarse and fine Nuclepore polycarbonate filters, providing fine (0.4 μm) and coarse (8 μm)
Maenhaut, Willy, Mkoma, SL, Raes, Niko
core   +3 more sources

Analytical studies on medieval lead ingots from Wrocław and Kraków (Poland): a step towards understanding bulk trade of lead from Kraków and Silesia Upland Pb–Zn deposits

Heritage Science, 2022
Origins of medieval lead artefacts are hard to establish due to re-smelting and mixing. One can obtain conclusive evidence from ingots that served for bulk trade and originated directly from the mines.
Beata Miazga, Paweł Duma, Paweł Cembrzyński, Milena Matyszczak, Jerzy Piekalski   +4 more
doaj   +1 more source

Environmentally benign copper nanoparticles supported on walnut shell as a highly durable nanocatalyst for the synthesis of propargylamines [PDF]

Journal of the Serbian Chemical Society, 2017
This study was an attempt to prepare copper nanoparticles and to determine their catalytic activity employing walnut shell (WS) residue as a green support and a reusable material.
Saadati Fariba, Leghaei Vahid, Zamani Asghar   +2 more
doaj   +1 more source

Cationic vacancy induced room-temperature ferromagnetism in transparent conducting anatase Ti_{1-x}Ta_xO_2 (x~0.05) thin films

, 2012
We report room-temperature ferromagnetism in highly conducting transparent anatase Ti1-xTaxO2 (x~0.05) thin films grown by pulsed laser deposition on LaAlO3 substrates. Rutherford backscattering spectrometry (RBS), x-ray diffraction (XRD), proton induced
Ariando, Barman, A. Roy, Breese, M. B. H., Dai, Y., Dhar, S., Ding, J., Feng, Y. P., Hilgenkamp, H., Motapothula, M., Neuber, G., Qi, D. -C., Ruebhausen, M., Rusydi, A., Santoso, I., Venkatesan, T., Wee, A. T. S., Yakovlev, N. L., Yang, K., Yi, J. B.   +18 more
core   +1 more source

alpha - HgS Nanocrystals: Synthesis, Structure and Optical Properties

, 2011
Well-separated mercury sulfide (HgS) nanocrystals are synthesized by a wet chemical route. Transmission electron microscopy studies show that nanocrystals are nearly spherical in shape with average size of 9 nm.
A.K. Dash, A.K. Mahapatra, Bond, Bruchez, Campbell, Colvin, Dabbousi, Klein, Kreingol’d, Lamber, Ma, Mews, Qadri, Roberts, Sapriel, Wang, Wu, Xu, Yeh, Yu, Zallen   +20 more
core   +1 more source

Effect of Metal Oxides on Reaction Route and Product Distribution of Catalytic Cellulose Hydrogenolysis

BioResources, 2023
The effects of CeO2, ZrO2, Nb2O5, and ZnO catalysts supported on carbon nanotubes (CNT) relative to cellulose hydrothermal hydrogenolysis in the presence of Ni/CNT and pressured H2 was studied in this work. The catalysts were characterized by inductively
Guifang Fan, De Chen, Shizhong Li, Mingde Yang, Yulong Wu   +4 more
doaj   +2 more sources

Structural Plasticity and Noncovalent Substrate Binding in the GroEL Apical Domain. A study using electrospray ionization mass spectrometry and fluorescence binding studies [PDF]

, 2002
Advances in understanding how GroEL binds to non-native proteins are reported. Conformational flexibility in the GroEL apical domain, which could account for the variety of substrates that GroEL binds, is illustrated by comparison of several independent ...
Adams, Boisvert, Braig, Braig, Brinker, Brocchierei, Brunger, Brunger, Buckle, Bukau, Chatellier, Chatellier, Chatellier, Chen, Collaborative Computational Project, N., Coyle, Dessauer, Ewalt, Feltham, Fenton, Ferrige, Grallert, Hartl, Hartl, HayerHartl, Hemmingsen, Hlodan, Houry, Hunt, Hutchinson, Jancarik, Jones, Jones, Kobayashi, Konermann, Kraunsoe, Kusmierczyk, Landry, Landry, Leslie, Loo, Ma, Murshudov, Navaza, Pace, Pflugrath, Ploegman, Raftery, Ranson, Robinson, Romano, Roseman, Rye, Sigler, Smith, Smote, Tanaka, Wang, Weber, Weber, Weissman, Xu, Zahn   +62 more
core   +1 more source

Thermal Stability of Azurite and Malachite in Relation to the Formation of Mediaeval Glass and Glazes [PDF]

, 2002
Azurite and malachite have been extensively used as pigments in ancient and medieval manuscripts, glasses and glazes. The thermal stability of naturally occurring azurite and malachite was determined using a combination of controlled rate thermal ...
Ding, Zhe, Frost, Raymond, Kloprogge, Jacob, Martens, Wayde   +3 more
core   +2 more sources

Modern X-ray Spectroscopy I. X-ray Emission Spectrometry

Journal of the Spectroscopical Society of Japan, 2008
X-ray fluorescence spectrometry enables non-destructive elemental analysis at ambient air pressure. In this article, after short description of interaction between x-rays and solid matter, mechanism of emission of x-ray fluorescence are explained, recent developments of x-ray source, x-ray optics, especially x-ray polycapillary focusing optics and x ...
openaire   +2 more sources