Effects of strontium on the absorption of calcium, magnesium and phosphate ions from the ovine reticulo-rumen

2000 ◽  
Vol 170 (3) ◽  
pp. 225-229 ◽  
Author(s):  
D. R. Wadhwa ◽  
A. D. Care
Keyword(s):  
Phosphate Ions ◽  
Calcium Magnesium

scholarly journals Resorbable Mg2+-Containing Phosphates for Bone Tissue Repair

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4857
Author(s):  
Gilyana Kazakova ◽  
Tatiana Safronova ◽  
Daniil Golubchikov ◽  
Olga Shevtsova ◽  
Julietta V. Rau
Keyword(s):  
Bone Tissue ◽  
Tissue Repair ◽  
Early Stage ◽  
Biological Properties ◽  
Magnesium Ions ◽  
Comprehensive Overview ◽  
Phosphate Ions ◽  
Calcium Magnesium ◽  
Great Relevance

Materials based on Mg2+-containing phosphates are gaining great relevance in the field of bone tissue repair via regenerative medicine methods. Magnesium ions, together with condensed phosphate ions, play substantial roles in the process of bone remodeling, affecting the early stage of bone regeneration through active participation in the process of osteosynthesis. In this paper we provide a comprehensive overview of the usage of biomaterials based on magnesium phosphate and magnesium calcium phosphate in bone reconstruction. We consider the role of magnesium ions in angiogenesis, which is an important process associated with osteogenesis. Finally, we summarize the biological properties of calcium magnesium phosphates for regeneration of bone.

Studies on the Chemical Composition of Muscle Tissue

1960 ◽  
Vol 37 (4) ◽  
pp. 879-888
Author(s):  
JAMES D. ROBERTSON
Keyword(s):  
Blood Serum ◽  
Water Content ◽  
Sea Water ◽  
Inorganic Ions ◽  
Osmotic Concentration ◽  
Trichloracetic Acid ◽  
Bicarbonate Ions ◽  
Phosphate Ions ◽  
Muscle Concentration ◽  
Calcium Magnesium

1. Methods of analysis of muscle are discussed, particularly in regard to ashing and extraction procedures for inorganic ions and the determination of chloride. 2. Simultaneous analyses have been made of blood and muscle for the following ions: Na, K, Ca, Mg, Cl, SO4, inorganic and total trichloracetic acid soluble P (inorganic and organic phosphates). 3. In Myxine muscle the ions analysed make up 39-47% (average 42%) of the total osmotic concentration, assuming it to be that of the blood-serum: 491 mg. ions/kg. water content compared with 1181 mg. ions/kg. water in the serum. The latter is practically isosmotic with the surrounding sea water of 1208 mg. ions. Potassium and phosphate are the only ions higher in concentration in the muscle than in the serum, but the muscle concentration of sodium exceeds that of potassium. Low calcium concentrations of 1.8-2.2 mg. ions/kg. water in the muscle and 5.5-7.1 mg. ions in the blood serum, compared with 11.1 mg. ions in the sea water, are correlated with the absence of a calcified skeleton. 4. Muscle ions in Muraena come to 308 mg. ions/kg. water content, about 72% of the osmotic concentration of the plasma; the latter is about one-third that of the surrounding sea water. Potassium, calcium, magnesium and phosphate ions in muscle exceed their respective concentrations in the plasma, while the remaining sodium, chloride and sulphate ions are below the plasma values. 5. Cation-anion balance of the analysed constituents of Myxine muscle is satisfactory, but there is a considerable anion deficit in Muraena muscle, probably made up in part by lactate and bicarbonate ions.

Formation of water chemistry in the Modonkul river under the action of mine drainage effluent

2020 ◽  
pp. 56-66
Author(s):  
Z. I. Khazheeva ◽  
S. S. Sanzhanova
Keyword(s):  
Water Chemistry ◽  
Mine Drainage ◽  
High Concentration ◽  
Catchment Basin ◽  
Sulfate Anion ◽  
Concentrated Flow ◽  
Sodium Calcium ◽  
Calcium Cation ◽  
Calcium Magnesium ◽  
The Town

The Dzhida ore field in the Zakamensk district of Buryatia features high concentration of mineralization within a small area. The Dzhida deposit is composed of complex ore. The ore field contains commercial-value primary deposits: Pervomai stockwork of molybdenum, Kholtoson tungsten lode and Inkur stockwork of tungsten. The Modonkul river catchment basin lies inside the Dzhida ore field. A real threat to the town of Zakamensk is created by manmade sand-bulk (old) tailings and slurry dump. By now, the concentrated flow of natural and man-made sand enters the low terrace and floodplain of the Modonkul river in the form of a talus train. This study is focused on the influence of the mine drainage effluent and the Inkur tributary on the water chemistry in the Modonkul river. 80 water samples were taken from the surface layer 0-0.5 m thick at five stations. Physicochemical indices of water were measured at the water sampling points, and the water chemistry was analyzed in a laboratory. In the background conditions, cations and anions in the Modonkul water chemistry range in decreasing order as follows: Са2+ > Mg2+ > Na++К+ и HCO - > SO 2- > Cl-. In the zone of mixture of natural and mine process water, the chemistry changes: from hydrocarbonate to sulfate (anion), from calcium-magnesium to sodium-calcium (cation). Downstream the natural chemistry changes to the hydrocabonate-sulfate composition, with prevailing content of calcium in cations. Iron content of water lowers 3-4 times after influx of mine effluents, while the contents of Mn, Zn, Co and Cd grow and then decrease downstream.

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