scholarly journals Chemical and Physiological Change from Calcium Carbonate to Calcium Phosphate in Skeletal Structures

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Wu Dee H. ◽  
Preskitt Caroline ◽  
Gresham-Fiegel Carolyn
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate ◽  
Physiological Change ◽  
Skeletal Structures

scholarly journals Pure hydroxyapatite synthesis originating from amorphous calcium carbonate

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Michika Sawada ◽  
Kandi Sridhar ◽  
Yasuharu Kanda ◽  
Shinya Yamanaka
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate ◽  
Room Temperature ◽  
Molar Ratio ◽  
Final Phase ◽  
Amorphous Calcium Carbonate ◽  
Phosphate Compound ◽  
Synthesis Strategy ◽  
Phosphorylation Reaction ◽  
Subsequent Calcination

AbstractWe report a synthesis strategy for pure hydroxyapatite (HAp) using an amorphous calcium carbonate (ACC) colloid as the starting source. Room-temperature phosphorylation and subsequent calcination produce pure HAp via intermediate amorphous calcium phosphate (ACP). The pre-calcined sample undergoes a competitive transformation from ACC to ACP and crystalline calcium carbonate. The water content, ACC concentration, Ca/P molar ratio, and pH during the phosphorylation reaction play crucial roles in the final phase of the crystalline phosphate compound. Pure HAp is formed after ACP is transformed from ACC at a low concentration (1 wt%) of ACC colloid (1.71 < Ca/P < 1.88), whereas Ca/P = 1.51 leads to pure β-tricalcium phosphate. The ACP phases are precursors for calcium phosphate compounds and may determine the final crystalline phase.

Synthesis, Characterization and Properties of the IA / SAS Copolymer

2013 ◽  
Vol 423-426 ◽  
pp. 404-407
Author(s):  
Zhen Fa Liu ◽  
Hao Lin Fu ◽  
Li Hui Zhang ◽  
Yan He Zhang ◽  
Xuan Liu
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate ◽  
Itaconic Acid ◽  
Inhibition Rate ◽  
Biodegradation Rate ◽  
Scale Inhibition ◽  
Good Scale

A copolymer was prepared from itaconic acid (IA) and sodium allysulfonate (SAS). The structure of the IA/SAS copolymer was characterized by the means of FTIR. The performances of scale inhibition, dispersion and biodegradability of the IA/SAS copolymer were studied. The results showed that the IA/SAS copolymer had good scale inhibition and dispersing performance. The scale inhibition rate on calcium carbonate was 93% when the copolymer was 20 mg·L-1. The scale inhibition rate on calcium phosphate was 92% when the copolymer was 24 mg·L-1. The copolymer had good biodegradation performance and biodegradation rate could reach 69.5% after 28 days.

Preparation and Application of Polymers as Inhibitors for Calcium Carbonate and Calcium Phosphate Scales

2013 ◽  
Vol 62 (6) ◽  
pp. 323-329 ◽  
Author(s):  
Xiaoxian Gu ◽  
Fengxian Qiu ◽  
Xin Zhou ◽  
Jing Qi ◽  
Yang Zhou ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate

Effect of calcium carbonate on the compliance of an apatitic calcium phosphate bone cement

Biomaterials ◽  
1997 ◽  
Vol 18 (23) ◽  
pp. 1535-1539 ◽  
Author(s):  
I. Khairoun ◽  
M.G. Boltong ◽  
F.C.M. Driessens ◽  
J.A. Planell
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate ◽  
Bone Cement ◽  
Calcium Phosphate Bone Cement

Geometrically structured implants for cranial reconstruction made of biodegradable polyesters and calcium phosphate/calcium carbonate

Biomaterials ◽  
2004 ◽  
Vol 25 (7-8) ◽  
pp. 1239-1247 ◽  
Author(s):  
Carsten Schiller ◽  
Christian Rasche ◽  
Michael Wehmöller ◽  
Felix Beckmann ◽  
Harald Eufinger ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate ◽  
Biodegradable Polyesters

scholarly journals A Case of Hydrocele Stone with Its Composition Analysis

2010 ◽  
Vol 2010 ◽  
pp. 1-2
Author(s):  
Masayoshi Zaitsu ◽  
Koji Mikami ◽  
Yuta Takeshima ◽  
Takumi Takeuchi
Keyword(s):  
Prostate Cancer ◽  
Calcium Carbonate ◽  
Calcium Phosphate ◽  
Prostate Specific Antigen ◽  
Specific Antigen ◽  
Endocrine Treatment ◽  
Composition Analysis ◽  
Tunica Vaginalis ◽  
Infrared Spectrophotometer ◽  
The Right

Hydrocele stones are freely mobile calcified bodies lying between the tunica vaginalis layers, and they are relatively rare. We present here another case of hydrocele stone incidentally discovered when castration was being undergone for the endocrine treatment of prostate cancer. A 71-year-old man was diagnosed as stage D2 prostate cancer with his prostate-specific antigen 387 ng/ml. A white smooth stone of 11 mm in diameter was incidentally found moving freely in the right hydrocele space during castration. The hydrocele stone was of yellow hard center with white materials around it. Crystallographical analysis of the hydrocele stone by a infrared spectrophotometer showed that the center was composed of 64% calcium carbonate and 36% calcium phosphate, while the outer portion was protein. Our case is the fourth where crystallographical analysis was reported for hydrocele stones.

Colonic intussusception secondary to a calcium phosphate bezoar in a child receiving calcium carbonate for hyperphosphatemia

1989 ◽  
Vol 24 (11) ◽  
pp. 1195-1197 ◽  
Author(s):  
Robert D. Fildes ◽  
James E. Springate ◽  
Theodore Jewett ◽  
Mary M. O'Shea ◽  
Leonard G. Feld
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate
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