scholarly journals Lipid composition modulates ATP hydrolysis and calcium phosphate mineral propagation by TNAP-harboring proteoliposomes

2020 ◽  
Vol 691 ◽  
pp. 108482
Author(s):  
B.Z. Favarin ◽  
M. Bolean ◽  
A.P. Ramos ◽  
A. Magrini ◽  
N. Rosato ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Lipid Composition ◽  
Atp Hydrolysis ◽  
Phosphate Mineral

Precipitation SELEX: identification of DNA aptamers for calcium phosphate materials synthesis

2017 ◽  
Vol 53 (6) ◽  
pp. 1092-1095 ◽  
Author(s):  
K. R. Baillargeon ◽  
K. Meserve ◽  
S. Faulkner ◽  
S. Watson ◽  
H. Butts ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Dna Aptamers ◽  
Mineral Formation ◽  
Materials Synthesis ◽  
Phosphate Mineral

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

Intracellular mineralization of Bacterionema matruchotii

1981 ◽  
Vol 27 (3) ◽  
pp. 267-270 ◽  
Author(s):  
S. W. Ooi ◽  
A. C. Smillie ◽  
T. B. Kardos ◽  
M. G. Shepherd
Keyword(s):  
Crystal Growth ◽  
Calcium Phosphate ◽  
Intracellular Calcium ◽  
Electron Micrographs ◽  
Solid Phase ◽  
Calcium Hydroxyapatite ◽  
Mineral Formation ◽  
Phosphate Mineral ◽  
Calcium And Phosphorus ◽  
Phosphorus Levels

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.

scholarly journals MORE ON DEVELOPING FISH PASTE WITH IMPROVED BIOLOGICAL VALUE

2020 ◽  
Vol 2020 (3) ◽  
pp. 134-143
Author(s):  
Maria Evgenievna Tsibizova
Keyword(s):  
Chemical Composition ◽  
Calcium Phosphate ◽  
Grass Carp ◽  
Raw Materials ◽  
Food Additives ◽  
Experimental Studies ◽  
Mineral Supplement ◽  
Mineral Supplements ◽  
Phosphate Mineral ◽  
Physiological Group

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.

scholarly journals The Influences of Magnesium upon Calcium Phosphate Mineral Formation and Structure as Monitored by X-ray and Vibrational Spectroscopy

Soil Systems ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 8
Author(s):  
David M. Hilger ◽  
Jordan G. Hamilton ◽  
Derek Peak
Keyword(s):  
Calcium Phosphate ◽  
Calcareous Soils ◽  
X Ray Diffraction ◽  
Edge Structure ◽  
X Ray ◽  
Transmission Electron ◽  
Phosphate Mineral ◽  
Local Bonding ◽  
Wide Range ◽  
High Concentrations

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.

scholarly journals BIOCHEMICAL AND ULTRASTRUCTURAL ASPECTS OF CA2+ TRANSPORT BY MITOCHONDRIA OF THE HEPATOPANCREAS OF THE BLUE CRAB CALLINECTES SAPIDUS

1974 ◽  
Vol 61 (2) ◽  
pp. 301-315 ◽  
Author(s):  
Chung-Ho Chen ◽  
John W. Greenawalt ◽  
Albert L. Lehninger
Keyword(s):  
Calcium Phosphate ◽  
Blue Crab ◽  
Atp Hydrolysis ◽  
Callinectes Sapidus ◽  
Liver Mitochondria ◽  
Rat Liver Mitochondria ◽  
Molting Cycle ◽  
Hypertonic Medium ◽  
Dense Deposits ◽  
Crab Hepatopancreas

Mitochondria isolated from the hepatopancreas of the blue crab Callinectes sapidus show up to 12-fold stimulation of respiration on addition of Ca2+, which is accompanied by Ca2+ accumulation (Ca2+:site = 1.9) and H+ ejection (H+:Ca2+ = 0.85). Sr2+ and Mn2+ are also accumulated; Mg2+ is not. A strongly hypertonic medium (383 mosM), Mg2+, and phosphate are required for maximal Ca2+ uptake. Ca2+ uptake takes precedence over oxidative phosphorylation of ADP for respiratory energy. Once Ca2+ is accumulated by the crab mitochondria, it is stable and only very slowly released, even by uncoupling agents. ATP hydrolysis also supports Ca2+ uptake. Respiration-inhibited crab hepatopancreas mitochondria show both high-affinity and low-affinity Ca2+-binding sites, which are inactive in the presence of uncoupling agents. Crab hepatopancreas mitochondria have an enormous capacity for accumulation of Ca2+, up to 5,500 ng-atoms Ca2+ per mg protein, with an equivalent amount of phosphate. Freshly isolated mitochondria contain very large amounts of Ca2+, Mg2+, phosphate, K+, and Na+; their high Ca2+ content is a reflection of the vary large amount of extra-mitochondrial Ca2+ in the whole tissue. Electron microscopy of crab mitochondria loaded with Ca2+ and phosphate showed large electron-dense deposits, presumably of precipitated calcium phosphate. They consisted of bundles of needle-like crystals, whereas Ca2+-loaded rat liver mitochondria show only amorphous deposits of calcium phosphate under similar conditions. The very pronounced capacity of crab hepatopancreas mitochondria for transport of Ca2+ appears to be adapted to a role in the storage and release of Ca2+ during the molting cycle of this crustacean.

Nonenzymatic Transformation of Amorphous CaCO3into Calcium Phosphate Mineral after Exposure to Sodium Phosphate in Vitro: Implications for in Vivo Hydroxyapatite Bone Formation

ChemBioChem ◽  
2015 ◽  
Vol 16 (9) ◽  
pp. 1323-1332 ◽  
Author(s):  
Werner E. G. Müller ◽  
Meik Neufurth ◽  
Jian Huang ◽  
Kui Wang ◽  
Qingling Feng ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Bone Formation ◽  
Sodium Phosphate ◽  
Phosphate Mineral
Sign in / Sign up

Export Citation Format

Share Document