Results 31 to 40 of about 21,174 (168)

Characterization of a complex carbonate-silicate apatite ore and its concentration by a two-stage anionic flotation method

REM: International Engineering Journal, 2022
A carbonate-silicate low weathering phosphate ore from an igneous origin deposit in Southeastern Brazil presents a challenge mainly for apatite flotation from its gangue minerals, calcite and dolomite, plus the presence of phlogopite, diopside, magnetite,
Isabel de Sousa Batista Carvalho, Paulo Roberto Gomes Brandao, Andreia Bicalho Henriques, Eliomar Evaristo Ferreira   +3 more
doaj   +1 more source

Calcium Carbonate Pendants as a Record of Climate Change in Semiarid Soils of Rashkan Region, Urmia, Iran

Почвознание, агрохимия и екология, 2010
Accumulation of secondary calcium carbonates in arid and semiarid regions is а valuable tool in evaluating thе degree of soil evolution, soil age, paleoenvironmental reconstruction, soil classification and land use.
SHAHRAM МАNAFI
doaj  

3D Chitin Scaffolds of Marine Demosponge Origin for Biomimetic Mollusk Hemolymph-Associated Biomineralization Ex-Vivo

Marine Drugs, 2020
Structure-based tissue engineering requires large-scale 3D cell/tissue manufacture technologies, to produce biologically active scaffolds. Special attention is currently paid to naturally pre-designed scaffolds found in skeletons of marine sponges, which
Marcin Wysokowski, Tomasz Machałowski, Iaroslav Petrenko, Christian Schimpf, David Rafaja, Roberta Galli, Jerzy Ziętek, Snežana Pantović, Alona Voronkina, Valentine Kovalchuk, Viatcheslav N. Ivanenko, Bert W. Hoeksema, Cristina Diaz, Yuliya Khrunyk, Allison L. Stelling, Marco Giovine, Teofil Jesionowski, Hermann Ehrlich   +17 more
doaj   +1 more source

Effect of Fe3+ on Flotation Separation of Fluorite and Calcite in Sodium Silicate System

Kuangchan zonghe liyong, 2023
This is an essay in the field of mineral processing engineering. Fluorite and calcite are calcium-bearing minerals with similar physical and chemical properties.
Jiangfeng Ning, Hanbing Xu, Liang Geng, Jianhong Zeng, Wei Yao, Hao Sun   +5 more
doaj   +1 more source

Hydrophobic Carbonate Coatings on Pure Biodegradable Mg by Immersion in Carbonated Water: Formation Mechanism

Applied Sciences, 2022
Mg is one of the few materials of choice for biodegradable implants, despite its rapid degradation when used without surface protection treatment. This study presents the effect of carbonation time on the formation of hydrophobic carbonate coatings grown
Monica Popa, Mihai Anastasescu, Ioana Catalina Gifu, Jose M. Calderon Moreno   +3 more
doaj   +1 more source

Isotopic-geochemical features of thermal water of the Kyndyg deposit (Republic of Abkhazia)

Литосфера, 2020
Subject. The aim of the work is to study the mechanism and sources of water formation, as well as the peculiarities of carbonate mineralization in the aquifer of the Kyndyg thermal water deposit. Materials and methods.
S. S. Potapov, D. V. Kiseleva, O. Ya. Chervyatsova, N. V. Parshina, M. V. Chervyakovskaya, S. V. Karpova, N. V. Cherednichenko, R. S. Dbar   +7 more
doaj   +1 more source

Pengaruh Ion Karbonat dalam Proses Presipitasi Senyawa Kalsium Fosfat [PDF]

Makara Seri Sains, 2002
An experiment has been conducted to fi nd out the effect of ion carbonate in the calcium phosphate precipitation process. It was conducted by adding CaCl2.2H2O 8 mM into Na2HPO4.2H2O 8 mM and NaHCO3.
Siti Ahmiatri, Djarwani S. Soejoko
doaj  

Morphological characteristic and causes of color for the crystals of calcite from Liboje

Geologija, 2014
The crystals of calcite from the quarry Liboje were investigated and compared with calcite crystals from other quarries in the surrounding area of Celje.
Maja Plaskan, Sabina Kramar, Miha Jeršek   +2 more
doaj   +1 more source

Effects of temperature, pressure, and hydration on the microstructural characteristics and mechanical properties of calcite

Frontiers in Chemistry
Geotechnical geological disasters occur frequently in China. Especially under complex environmental conditions, the failure mode of rock and the change mechanism of its mechanical properties are not clear.
Xiaoyi Zhou, Qiuqi Chen, Xin Tang, Xin Tang, Ruiyu He, Zhangping Yan, Junjie Xiong, Yuhang Zhou, Linyan Li   +8 more
doaj   +1 more source

Electrochemical and biomimetic deposition of calcium phosphates on titanium alloys

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов
The presence of impurities of other metals in titanium alloys affects the composition of the oxide film after heat treatment: in addition to rutile, the VT 00 alloy contains Ti6O oxide, which in the VT 1-0 and VT 6 alloys is transformed into Ti3O oxide ...
A.E. Doroshenko, V.K. Krut’ko, O.N. Musskaya, A.I. Kulak   +3 more
doaj   +1 more source