Results 91 to 100 of about 26,348 (308)

Experimental and modeling study of fluid pressure-driven fractures in Darley Dale sandstone

, 2004
We report measurements of acoustic emissions (AE) generated during formation and growth of pressure driven fractures in cylindrical samples of Darley Dale sandstone that were co-axially pre-drilled in order to allow an internal pressure to be applied.
Hazzard, J, Vinciguerra, S., Meredith, P. G., Vinciguerra, S, Meredith, PG, Hazzard, J.   +5 more
core   +1 more source

Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs

Deep Underground Science and Engineering, EarlyView.
A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao, Shuheng Du, Yuan Zhang, Jinghong Hu, Bo Zhou, Yun Wei   +5 more
wiley   +1 more source

Study on the promotion multiple of blood flow velocity on human epidermal microcirculation of volcanic rock polymer fiber seamless knitted fabric

AUTEX Research Journal
As a material that can release infrared rays, volcanic rock polymer fibers can be used in textiles to improve human microcirculation, which is helpful to relieve chronic inflammatory diseases such as perishoulder arthritis. In this article, there are two
Qian Shuxian, Jin Zimin, Zhang Yixing, Fang Chengxiao, Jin Jing, Sun Yuqiang, Zheng Cong   +6 more
doaj   +1 more source

Safety and efficacy of a feed additive consisting of natrolite-phonolite obtained from volcanic rock from Kaiserstuhl for all animal species (Hans G. Hauri Mineralstoffwerk GmbH). [PDF]

EFSA J, 2023
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Bampidis V, Azimonti G, Bastos ML, Christensen H, Dusemund B, Durjava M, Kouba M, López-Alonso M, López Puente S, Marcon F, Mayo B, Pechová A, Petkova M, Ramos F, Villa RE, Woutersen R, Galobart J, Holczknecht O, Innocenti M, Pizzo F, Vettori MV, Ortuño J.   +22 more
europepmc   +1 more source

Volcanic Rock in Russia [PDF]

Nature, 1967
Tufflavas and Ignimbrites A Survey of Soviet Studies. Edited by Earl F. Cook. Translated from the Russian by Miriam Carty. Pp. xii + 212. (New York: American Elsevier Publishing Company, Inc.; London: Elsevier Publishing Company, Ltd., 1966.) 60s.
openaire   +1 more source

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

Petrology and Geochemistry of Intrusive Rocks in the Tanjung Area, South Sulawesi, Indonesia: Implications for Magma Origin, Source Materials, and Geodynamic Setting

Iraqi Geological Journal
The origin of magma, source materials, and geodynamic setting of plutonic and volcanic rocks was elucidated by studying the characteristics of the rocks in the Tanjung area, South Sulawesi, Indonesia.
Hasbi Bakri, Imran Imran, Ulva Irvan, Adi Maulana   +3 more
doaj   +1 more source

Effective mechanisms of water purification for nitrogen-modified attapulgite, volcanic rock, and combined exogenous microorganisms. [PDF]

Front Microbiol, 2022
Zheng Y, Wang Y, Yang X, Gao J, Xu G, Yuan J.   +5 more
europepmc   +1 more source

Metal‐Free Halogen‐Engineered Carbon Nanotubes for Highly Efficient Oxygen Reduction Reaction

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
In work employs density functional theory screening to guide the halogen engineering of metal‐free, Cl‐mediated carbon nanotubes for a highly efficient oxygen reduction reaction (ORR). Cl‐mediation optimally tunes the electronic structure and binding energies of oxygen intermediates, delivering an ORR activity rivaling that of commercial Pt/C, high 4e−
Kai Zhao, Mengni Liu, Xia Zhang, Fucheng Wu, Linfeng Li, Yuxiao Liu, Muhammad Humayun, Hussein A. Younus, Xinying Xue, Sadegh Rostamnia, Jian Xia, Chundong Wang   +11 more
wiley   +1 more source

Asal-usul Pembentukan Gunung Batur di daerah Wediombo, Gunungkidul, Yogyakarta

Indonesian Journal on Geoscience, 2014
http://dx.doi.org/10.17014/ijog.vol2no3.20073Physiographically, the Gunung Sewu Subzone is predominantly composed of limestone of the Wonosari Formation, but in Wediombo area volcanic rocks of the Wuni Formation is exposed.
Gendoet Hartono, Sutikno Bronto
doaj   +1 more source