Results 111 to 120 of about 6,709 (223)

Mineralogical analyses in Peştera Polovragi (Olteţului Gorges) and Peştera Muierii (Galbenului Gorges), Gorj county

open access: yesTravaux de l'Institut de Speologie Emile Racovitza, 2009
Following a series of cave mineralogy researches in Peştera Polovragi and Peştera Muierii, Gorj County, we evidence an association made up of hydroxylapatite, taranakite, calcite and secondarily of quartz and illite and respectively, of hydroxylapatite ...
GABRIEL DIACONU   +2 more
doaj  

Dual-energy computed tomography for the differentiation of uric acid stones: ex vivo performance evaluation [PDF]

open access: yes, 2018
We assessed the potential of dual-energy computed tomography (CT) for the differentiation between uric acid (UA)-containing and non-UA-containing urinary stones. Forty urinary stones of 16 different compositions in two sizes (
Alkadhi, Hatem   +8 more
core  

Mineralogical researches in "Peștera cu Lilieci din satul Peștera", Bran-Rucăr Passage

open access: yesTravaux de l'Institut de Speologie Emile Racovitza, 2008
By means of X-rays diphractometric analyses on powders, we evidence an association of minerals in “Peştera cu Lilieci din satul Peştera”, made up of hydroxylapatite(carbonate-hydroxylapatite), brushite, taranakite, calcite, quartz, illite and ...
GABRIEL DIACONU   +2 more
doaj  

fabrication of electrospun dicalcium phosphate anhydrous and chitosan based scaffolds [PDF]

open access: yes, 2014
Dicalcium phosphate anhydrous (DCPA) powder was synthesized in the size range between 200- 750 nm using calcium carbonate and phosphoric acid in ethanol solution.
Lipsita, S
core  

Influence of Humic Acid and Gypsum on Phosphorus Dynamics and Rice Yield in an Acidic Paddy Soil of Thailand

open access: yesSoil Systems
Managing phosphorus (P) in acidic paddy soils is crucial for sustaining rice yields. However, the effects of combined humic acid (HA) and flue gas desulfurization gypsum (FG), a by-product of coal-fired power plants, on P forms remain poorly understood ...
Hartina   +4 more
doaj   +1 more source

Morphology-Dependent Transformation of Dicalcium Phosphate Dihydrate (DCPD) to Octacalcium Phosphate (OCP) and Its Stability in Simulated Physiological Fluids

open access: yesMolecules
Calcium phosphate (CaP) materials are biocompatible and non-toxic to the body. However, they lack biointegration, exhibit a low resorption rate and can cause fibrous encapsulation throughout the implant material.
Daniela Chávez-Herrera   +7 more
doaj   +1 more source

Оценка биосовместимости и биорезорбируемости кальций-фосфатного материала для восстановления дефектов костной ткани - "Клипдент-цен" : Часть II. Доклинические исследования [PDF]

open access: yes, 2012
Дается оценка эффективности использования кальций-фосфатного материала для восстановления дефектов костной тканиyesБелгородский ...
Надеждин, С. В.   +4 more
core  

Electrochemical and biomimetic deposition of calcium phosphates on titanium alloys

open access: yesФизико-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   +3 more
doaj   +1 more source

Inhibition of Acid Phosphatase Enzyme Activity in the Presence of Noncrystalline Calcium Phosphate and Nanocrystalline Calcium Apatite: a Preliminary Study [PDF]

open access: yes, 2009
*Background* Our bones are remodelled repeatedly during life. A new and “healthy” bone tissue replaces the old one. Accordingly, the bone degrading cells, the osteoclasts, prefer old and fatigued bone.
Yassen Pekounov
core   +2 more sources

Compositions et propriétés de nouveaux ciments biomédicaux à base de carbonate de calcium [PDF]

open access: yes, 2006
Les ciments ioniques sont une voie d’avenir des biomatériaux de substitution osseuse et dentaire. Des compositions originales de ciments biorésorbables et biocompatibles incluant une proportion importante de carbonate de calcium synthétique (de 40 % à ...
Combes, Christèle, Rey, Christian
core  

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