Results 121 to 130 of about 30,580 (243)

Precipitation mechanism of anhydrite cement in lacustrine tight sandstone: Implications for fluid activity, mass transfer and pore origin of open diagenetic system in tight sandstone

The Depositional Record, Volume 12, Issue 1, February 2026.
This paper discusses a new model concerning the precipitation mechanismand significance of anhydrite cement in tight sandstone. Anhydrite cement ismainly formed by the dissolution and reprecipitation of early‐diageneticcalcite cements, feldspars and volcanic rock fragments at the mesodiageneticstage.
Long Luo, Meng Li, Shanzheng Tan, Xianfeng Tan, Xin Yu, Jon Gluyas, Jia Wang, Wei Jiang, Xuejiao Qu, Kangjun Wu, Yiting Gu   +10 more
wiley   +1 more source

Effects of Micropore Size Distribution in Carbonate Apatite Honeycomb Granules on Bone Replacement

Journal of Biomedical Materials Research Part A, Volume 114, Issue 2, February 2026.
Bone regeneration capacity of two carbonate apatite honeycombs with identical porosity but different pore size distributions. ABSTRACT Successful bone defect repair requires understanding both the role of micropores smaller than 10 μm and that of macropores.
Koichiro Hayashi, Ryo Kishida, Kunio Ishikawa   +2 more
wiley   +1 more source

Disappearance of peculiarly large atomic displacement in the high‐temperature phase of magnetite with substitution of Fe2+ by Ni2+ and Mn2+

Acta Crystallographica Section B, Volume 82, Issue 1, Page 98-107, February 2026.
Structures of Fe2.992O4 (magnetite), Fe3–x–yMnx□yO4 (x ≤ 0.980) and Fe3–x–yNix□yO4 (x ≤ 0.513, □ denotes point defects) are examined at room temperature. The observed disappearance of peculiarly large mean‐square displacement at the B site along the 3 axis in [111] is interpreted as a disappearance of phonons interact with electrons in the high ...
Takumi Kitamura, Takahiro Niimi, Hiroki Okudera   +2 more
wiley   +1 more source

Thermal, Structural and Morphological Characterisation of Freeze-dried Copper(II) Acetate Monohydrate and its Solid Decomposition Products

Materials Research, 2002
In the present study the thermal decomposition of a freeze-dried copper(II) acetate monohydrate powder, (CH3COO)2Cu.H2O, (FDCuAcH2O), was analysed by a combination of high-temperature X-ray diffractometry; differential scanning calorimetry and ...
Bellini J.V., Machado R., Morelli M.R., Kiminami R.H.G.A.   +3 more
doaj  

MINERALOGY OF THE OVERBURDEN ROCKS OF THE KOKLAN W-MO DEPOSIT (SOUTH URALS) [PDF]

Минералогия, 2015
The Koklan W-Mo deposit is overlapped by Mesozoic-Cenozoic rocks 120–140 m thick, which may be subdivided in four members on the basis of variable proportions of the rock-forming minerals (quartz, hydromica (with glauconite), smectites and X-ray ...
E.V. Belogub, K.А. Novoselov, E.E. Palenova, P.V. Khvorov   +3 more
doaj  

Spatial distribution of 6s2 lone electron pair in Pb4Na(PO4)3 and stereochemical activity of the 6s2 electron cloud in lead‐bearing apatites

Acta Crystallographica Section B, Volume 82, Issue 1, Page 68-77, February 2026.
In lacunary apatite structure‐type Pb4Na(PO4)3, residual density attributable to the deformed 6s2 electron cloud is found in the vicinity of A2‐site Pb2+ on regular A2 triangle normal to c. Systematic comparison on the size of the A2 triangle with other apatite‐type compounds indicates limited stereochemical activity of the orbital.Single crystals of ...
Kotomi Hirano, Hiroki Okudera
wiley   +1 more source

Investigating Tribological Processes in Polymeric Composites

The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2011
The paper presents some results on investigation of the superficial layers of several polymeric composites intended for tribological applications. The evaluation of the tribological behavior is done with the help of SEM images, virtual images obtained by
Lorena DELEANU, Constantin GEORGESCU, Constantin GHEORGHIEŞ   +2 more
doaj  

Effects of Nanosilica Powder from Rice Hull Ash on Seed Germination of Tomato (Lycopersicon esculentum) [PDF]

, 2015
open5noNanosilica powders were synthesized from rice hull ash (RHA) and their effects on seed germination of tomato plants were investigated. Synthesized nanosilica powder was subjected to various characterization studies for identification of the size ...
De Silva, Diana Marie, Engelbert, Peralta, Fajardo, Alvin., Maria Morissa Lu,, Milagros, Peralta   +4 more
core  

A Test for Rapid Tribological Characterization of Bearing Steels

The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2012
In this paper is a study the influence of the material and heat treatment on the changes of the fine structure parameters of the superficial layer of triboelements during the first cycles of rolling contact process.
Constantin GHEORGHIES, Mihaela BUCIUMEANU, Dan SCARPETE, Livia GHEORGHIES, Dorian BOLD   +4 more
doaj  

Theoretical and material studies on thin-film electroluminescent devices [PDF]

The effect of surface nucleation processes on the quality of ZnS layers grown on (001) GaAs substrates by molecular beam epitaxy is reported. Reflection high energy electron diffraction indicated that nucleation at high temperatures produced more planar ...
Benz, R., II, Summers, C. J.
core   +1 more source