Results 81 to 90 of about 53,703 (183)

Pore Fractal and Structure Analysis of Pore-Filling Chlorite in Continental Shales: A Case Study from the Qingshankou Formation in the Gulong Sag

Fractal and Fractional
The successful exploration and development of shale oil in the clay-rich Gulong shale have sparked increased research into the influence of clay minerals on shale reservoirs.
Yuan Kang, Rukai Zhu, Kouqi Liu, Jingya Zhang, Chang Liu   +4 more
doaj   +1 more source

Multivariate Statistical Analysis of Phyllite Samples Based on Chemical (XRF) and Mineralogical Data by XRD [PDF]

, 2012
It is presented the results obtained of a multivariate statistical analysis concerning the chemical and phase composition, as a characterization purpose, carried out with 52 rock phyllite samples selected from the provinces of Almería and Granada (SE ...
Garzón Garzón, Eduardo, Ruiz Conde, Antonio, Sánchez Soto, Pedro José   +2 more
core   +1 more source

New Magnetite Reference Material for SIMS δ18O Measurements and a Study of Precision and Accuracy Due to Crystal Orientation Effects

Geostandards and Geoanalytical Research, EarlyView.
Key Points A new magnetite reference material (PF21mt) is available for δ18O measurements by SIMS. Reproducibility of measurement results in two laboratories suggest orientation bias of ±2‰ (2s) at 20 keV. Repeatability improves to ±1‰ (2s) when using a 13 keV protocol, suggesting reduced orientation bias. In situ isotope ratio measurements provide the
Michelle Ulrich, Daniela Rubatto, Maria Rosa Scicchitano, Benita Putlitz, Thomas Bovay   +4 more
wiley   +1 more source

High-Temperature Mineral Formation after Firing Clay Materials Associated with Mined Coal in Teruel (Spain) [PDF]

, 2020
The production of porcelain stoneware has experienced a considerable increase. Therefore, it was necessary to undertake an investigation that would allow knowing the mineralogical evolution that porcelain stoneware undergoes during the firing process, as
Jordán Vidal, Manuel Miguel, Meseguer Costa, Sergio, Montero, María Adriana, Pardo Fabregat, Francisco   +3 more
core   +2 more sources

Commercial clays in cosmetic formulations for hair care: Characterization and application to improve the mechanical properties of hair fibre

International Journal of Cosmetic Science, EarlyView.
The shampoo and conditioner bar formulations enhanced hair gloss, promoting softness, improved cuticle alignment, and effective protection of hair shafts against external aggressors. Findings from mechanical properties measurements indicate that the clay‐containing formulations enhance the mechanical strength of hair, contributing to stronger and more ...
João Pedro Gonçalves de Souza Soares, Melânia Lopes Cornélio, Fausthon Fred da Silva   +2 more
wiley   +1 more source

Dynamical effects induced by long range activation in a nonequilibrium reaction-diffusion system

, 2002
We both show experimentally and numerically that the time scales separation introduced by long range activation can induce oscillations and excitability in nonequilibrium reaction-diffusion systems that would otherwise only exhibit bistability.
A.R. Gourlay, A.R. Gourlay, D. Horváth, D. Sníta, E. Dulos, E. Dulos, F. Gauffre, I. Lengyel, I. Nagypal, J. Boissonade, J. Boissonade, J. Boissonade, J.E. Pearson, K.J. Lee, K.J. Lee, M. Fuentes, M. Fuentes, M. N. Kuperman, P. Blanchedeau, P. Blanchedeau, P. De Kepper, P. De Kepper, P. Deuflhard, P. Kaps, Q. Ouyang, Q. Ouyang, V. Castets, V. Dufiet, Z. Noszticzius, Á. Tóth, Á. Tóth   +30 more
core   +1 more source

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

Meteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska, S. Alwmark, C. Alwmark, M. H. Poelchau, P. Lambert   +4 more
wiley   +1 more source

X‐ray computed tomography study of terrestrial analog cores in preparation for Mars sample return

Meteoritics &Planetary Science, EarlyView.
Abstract Mars Sample Return (MSR) is expected to transform planetary science by providing unprecedented access to pristine Martian material. Initial characterization in the sample receiving facility (SRF) will rely on nondestructive techniques such as X‐ray computed tomography (XCT) to document the condition, distribution, and internal features of ...
Sophie Benaroya, Christopher D. K. Herd, David T. Flannery, Nicolas Randazzo   +3 more
wiley   +1 more source

Production of paper from rose wastes

Turkish Journal of Forestry, 2019
The main ingredient of paper production is cellulose fibers. Usually produced from wood fibers and annual plants. In this study it was investigated usability of waste rose pulps (Rosa Damascena Mill.) which have environmental risk in Isparta province as
Fatma BEKDAŞ, Mustafa KARABOYACI
doaj   +1 more source

Microbially generated ferruginous crusts: A potential biosignature of continental input in coastal settings

Sedimentology, EarlyView.
ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder, Renata Guimarães Netto, Alisson Klayton Martins   +2 more
wiley   +1 more source