EVIDENCE FOR AN ORGANIC NUCLEATIONAL AGENT OF CALCIUM PHOSPHATE MINERAL FORMS IN ENDOCHRONDAL PLATES

Author(s):  
D.S. Howell ◽  
J. Madruga ◽  
J.C. Pita
2020 ◽  
Vol 691 ◽  
pp. 108482
Author(s):  
B.Z. Favarin ◽  
M. Bolean ◽  
A.P. Ramos ◽  
A. Magrini ◽  
N. Rosato ◽  
...  

2017 ◽  
Vol 53 (6) ◽  
pp. 1092-1095 ◽  
Author(s):  
K. R. Baillargeon ◽  
K. Meserve ◽  
S. Faulkner ◽  
S. Watson ◽  
H. Butts ◽  
...  

DNA aptamers that enhance calcium phosphate mineral formation were identified using a novel precipitation SELEX method.


1981 ◽  
Vol 27 (3) ◽  
pp. 267-270 ◽  
Author(s):  
S. W. Ooi ◽  
A. C. Smillie ◽  
T. B. Kardos ◽  
M. G. Shepherd

Intracellular calcium phosphate mineral formation in Bacterionema matruchotii has been examined relative to two established points: the product of calcium and phosphorus levels at which spontaneous precipitation occurs (Ca × P), 50 (mg %)2, and the product at which calcium hydroxyapatite itself induces crystal growth, 35 (mg %)2. The extent of intracellular mineralization in the defined calcifying medium was determined analytically after washing the cells. Electron micrographs of B. matruchotii cells revealed needlelike crystals of mineral, typical of calcium hydroxyapatite. Bacterionema matruchotii was found to be an efficient nucleator and can bring about the formation of solid phase at a Ca × P product as low as 35 (mg %)2.


Author(s):  
Maria Evgenievna Tsibizova

In the context of the organization of proper nutrition of the population of Russia, regardless of belonging to any physiological group, taking into account the eating behavior of a modern person, the research has been carried out to expand the range of fish pastes by modifying their recipes. The goal has been achieved by combining raw materials of different origins and reducing the mass fraction of table salt. Experimental studies were carried out to substantiate the recipe compositions of pastes based on grass carp meat, the optimal proportion of calcium-phosphate mineral supplements was defined, a comparative analysis of organoleptic indicators of quality, chemical composition and energy value of the obtained products was conducted. It has been stated that the introduction of 2.5% of phosphate-calcium food additives into paste recipes No. 4 and 5 did not adversely affect the organoleptic quality indicators. The pastes produced according to recipes No. 4 and No. 5, which include grass carp meat (48%), chicken liver (10%), vegetable components (17%), calcium-phosphate mineral supplement (2,5%) and flavoring substances, can be recommended for mass nutrition of the population of Russia. The ratio of these components provides the high organoleptic properties and improved nutritional value. The inclusion of fish pastes enriched with vegetable components, chicken by-products, phosphate-calcium mineral supplements, differing in chemical composition, in the diet allows balancing the diet for proteins, fats, amino acids, vitamins, macro- and micronutrients and preventing from eating disorders and, in the result, reducing morbidity of population in the Russian Federation.


Soil Systems ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 8
Author(s):  
David M. Hilger ◽  
Jordan G. Hamilton ◽  
Derek Peak

Calcium phosphate minerals are typically the solubility-limiting phase for phosphate in calcareous soils. Magnesium (Mg), despite being present in high concentrations in calcareous soils, has been largely neglected in the study of formation and stabilization of soil phosphate minerals due to the high solubility of pure Mg phosphate phases. In this study, a series of four common calcium and magnesium phosphate minerals, hydroxyapatite/bobierrite and brushite/newberyite were synthesized in the presence of widely varying Mg concentrations to examine the effects of Mg substitution upon the local bonding environment and overall structure of the precipitates. Phosphorus K-edge X-Ray absorption near edge structure (XANES) and attenuated total reflectance Fourier transform infrared (ATR-FTIR) provide insight into the local coordination environment, whereas synchrotron powder X-Ray diffraction (SP-XRD) and transmission electron microscopy (TEM) were used for structural analysis. In acidic to neutral pH, Mg-bearing brushite phases formed over a wide range of Ca:Mg ratios. In neutral to high pH systems, a short-range order amorphous calcium phosphate (ACP) with a local structure analogous with hydroxyapatite precipitated for a wide range of Ca to Mg ratios. It can be inferred that the presence of Mg in soils leads to stabilization of metastable phases: via cation substitution in brushite and via poisoning of crystal growth propagation for hydroxyapatite.


ChemBioChem ◽  
2015 ◽  
Vol 16 (9) ◽  
pp. 1323-1332 ◽  
Author(s):  
Werner E. G. Müller ◽  
Meik Neufurth ◽  
Jian Huang ◽  
Kui Wang ◽  
Qingling Feng ◽  
...  

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