Results 121 to 130 of about 54,813 (368)

Petrogenesis of diachronous mixed siliciclastic-carbonate megafacies in the cool-water Oligocene Tikorangi Formation, Taranaki Basin, New Zealand [PDF]

, 2003
The Oligocene (Whaingaroan-Waitakian) Tikorangi Formation is a totally subsurface, lithostratigraphically complex, mixed siliciclastic-limestone-rich sequence forming an important fracture reservoir within Taranaki Basin, New Zealand.
Berggren W. A., Bernecker T., Driscoll N. W., Hood S. D., Hudson D. S., Hume T. R., Mauri S., Morgans H. E. G., Mullins H. T., Mullins H. T., Naish T. R., Nelson C. S., Nelson C. S., Palmer J. A., Rao C. P., Scott G. H., Simpson J., Tucker M., Westphal H., Young J.   +19 more
core   +2 more sources

Low‐Temperature Exsolution of Cobalt From Perovskite Nanoparticles via Bead Milling for Enhanced Electrocatalytic Oxygen Evolution Reaction

Advanced Functional Materials, EarlyView.
High‐temperature requirements and complex synthesis limit the practical use of perovskite‐based metal exsolution catalysts. This study addresses these limitations by employing bead milling, enabling efficient metal exsolution at a significantly lower temperature (300 °C) from La0.6Sr0.4CoO3‐δ nanoparticles. Consequently, the catalytic mass activity for
Sang‐Mun Jung, Youngkwang Kim, Dong‐Hwan Yang, Yoona Kim, Kyu‐Su Kim, Gogwon Choe, Jinhyeon Lee, Kyuwook Ihm, Si‐Young Choi, Junwoo Son, Yong‐Tae Kim   +10 more
wiley   +1 more source

Facile synthesis of ultrafine and high purity spherical strontium carbonate via gas-liquid reaction

Materials Research Express, 2020
In this work, a simple gas-liquid precipitation reaction was developed to fabricate spherical strontium carbonate (SrCO _3 ) particles using strontium hydroxide (Sr(OH) _2 ), carbon dioxide (CO _2 ) and ethylene diaminetetraacetic acid strontium salt ...
Xingwu Zou, Yanan Wang, Shudong Liang, Dongping Duan   +3 more
doaj   +1 more source

Natural calcium carbonate for biomedical applications [PDF]

arXiv, 2016
Sea shells are found to be a very rich natural resource for calcium carbonate. Sea shells are made up of CaCO3 mainly in the aragonite form, which are columnar or fibrous or microsphere structured crystals. The bioactivity of nanoparticles of sea shell has been studied in this work. The sea shells collected were thoroughly washed, dried and pulverized.
arxiv  

Highly Scalable, Raspberry‐Like Microbeads with Nano‐/Micro‐Confined Hybrid Hydrogel Desiccants for Rapid Atmospheric Water Harvesting

Advanced Functional Materials, EarlyView.
A scalable nano‐/micro‐confinement strategy is developed, where polyacrylamide (PAM)‐LiCl hybrid desiccants are confined within hollow nanoparticles (HNPs) and assembled into raspberry‐like microbeads. The beads have a hydrogel‐rich core and an NP‐rich shell for fast absorption and desorption, releasing water 13.6 L kg⁻¹ day⁻¹.
Yunchan Lee, So Hee Nah, Kun‐Yu Wang, Yinding Chi, Jong Bin Kim, Ziyun Zhang, Shu Yang   +6 more
wiley   +1 more source

Extremely metal-poor stars in classical dwarf spheroidal galaxies: Fornax, Sculptor and Sextans [PDF]

, 2010
We present the results of a dedicated search for extremely metal-poor stars in the Fornax, Sculptor and Sextans dSphs. Five stars were selected from two earlier VLT/Giraffe and HET/HRS surveys and subsequently followed up at high spectroscopic resolution with VLT/UVES.
arxiv   +1 more source

Calibration and Validation of Calcium Carbonate Precipitation Potential (CCPP) Model for Strontium Quantification in Cold Climate Aquatic Environments [PDF]

, 2022
Enisa Zanacic, Dena W. McMartin
openalex   +1 more source

Efficacy of the Biomaterials 3 wt%-nanostrontium-hydroxyapatite-enhanced Calcium Phosphate Cement (nanoSr-CPC) and nanoSr-CPC-incorporated Simvastatin-loaded Poly(lactic-co-glycolic-acid) Microspheres in Osteogenesis Improvement [PDF]

, 2016
Aims The purpose of this multi-phase explorative in vivo animal/surgical and in vitro multi-test experimental study was to (1) create a 3 wt%-nanostrontium hydroxyapatite-enhanced calcium phosphate cement (Sr-HA/CPC) for increasing bone formation and (2)
Masaeli, Reza, Jafarzadeh Kashi, Tahereh S., Dinarvand, Rassoul, Rakhshan, Vahid, Shahoon, Hossein, Hooshmand, Behzad, Abbas, Fatemeh Mashhadi, Raz, Majid, Rajabnejad, Alireza, Eslami, Hossein, Khoshroo, Kimia, Tahriri, Mohammadreza, Tayebi, Lobat   +12 more
core   +1 more source

Photocatalytic Versus Stoichiometric Hydrogen Generation Using Mesoporous Silicon Catalysts: The Complex Role of Sacrificial Reagents

Advanced Functional Materials, EarlyView.
This study highlights the importance of accounting for stoichiometric hydrogen produced when utilizing Si photocatalysts. The stoichiometric contribution is sacrificial reagent dependent and decreases with increasing sterics around the catalyst surface.
Sarrah H. Putwa, Sarah A. Martell, Berthold Reis, Simona Schwarz, Mita Dasog   +4 more
wiley   +1 more source

Chemical Composition of Carbonate Hardground Cements as Reconstructive Tools for Phanerozoic Pore Fluids

Geochemistry, Geophysics, Geosystems, 2020
In this study, we report the chemical composition of early carbonate cement precipitates in carbonate hardgrounds to understand the geochemical signature of near‐surface carbonate mineral precipitation.
Andrea M. Erhardt, Alexandra V. Turchyn, J. A. D. Dickson, Aleksey Y. Sadekov, Paul D. Taylor, Mark A. Wilson, Peter Scott, Daniel P. Schrag   +7 more
doaj   +1 more source