Calcium oxalates grown in human urine under different batch conditions

Walton, Rachel C.; Kavanagh, John P.; Heywood, Brigid R.; Rao, P. N.

doi:10.1016/j.jcrysgro.2005.06.057

Cited by 18 publications

(21 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Each form of hydrate can be easily recognised because COM usually precipitates in the form of dendrites or boat/coffin morphology, COD shows a bipyramidal morphology and COT gives plate-like morphology [3,4]. Calcium oxalates were up to now frequently studied as chemicals involved in formation of urinary calculi [5,6], main attention is paid to finding the factors and conditions giving support to calcium oxalate and consequently to kidney stone formation [7,8]. The most frequently published data on calcium oxalate describe the crystal growth (conditions and kinetics) [3,[9][10][11][12][13][14][15][16][17][18] and dissolution of hydrates [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Kinetic study of dehydration of calcium oxalate trihydrate

Honcová

Svoboda

Pilný

et al. 2015

J Therm Anal Calorim

View full text Add to dashboard Cite

The dehydration of calcium oxalate trihydrate was studied using DSC method and open sample crucibles. The dehydration proceeds in two steps where first two molecules of water are released around 80 °C and consequently the last molecule of water is released at a temperature around 130 °C. The kinetic analysis of overlapping peaks was done and the apparent activation energy, pre-exponential factor and kinetic exponents of kinetic model (reaction order model) were evaluated for both effects.

show abstract

Section: Introductionmentioning

confidence: 99%

Kinetic study of dehydration of calcium oxalate trihydrate

Honcová

Svoboda

Pilný

et al. 2015

J Therm Anal Calorim

View full text Add to dashboard Cite

show abstract

“…Fig. 1a indicates that all CaOx particles were hexagonal and plate-like and hence were identified as COM 14,15 . The number of COM particles decreased but those of COD gradually increased with increasing small caltrops concentration.…”

Section: Resultsmentioning

confidence: 99%

“…The number of COM particles decreased but those of COD gradually increased with increasing small caltrops concentration. Most CaOx particles appeared as octahedral crystals of COD 8,14,15 and druses (Fig. 1e).…”

Section: Resultsmentioning

confidence: 99%

Untitled

Pachana¹,

Wattanakornsiri²,

Nanuam³

2010

ScienceAsia

View full text Add to dashboard Cite

Calcium oxalate (CaOx) can be crystallized in several forms and morphologies. Here we studied the crystallization of CaOx by the precipitation of calcium chloride and sodium oxalate in the absence and presence of small caltrops (Tribulus terrestris). ] affected the crystal morphologies that were mainly hexagonal, octahedral, and dendritic. Higher small caltrops concentration raised the formation of calcium oxalate dihydrate (COD) crystals in an octahedral shape. It was concluded that small caltrops acts as a good inhibitor for kidney stones since they induce COD crystals which are easily excreted in urine.

show abstract

“…In organisms, pathological mineralization can lead to severe issues in soft tissues, the formation of mineral stones in bodily fluids, or the uncontrolled growth of hard tissues [11][12][13][14]. Organisms employ specific proteins to inhibit unwanted mineralization, which range from the blood-protein family of fetuins [11] to statherin (saliva) [15].…”

Section: Introductionmentioning

confidence: 99%

Indications that Amorphous Calcium Carbonates Occur in Pathological Mineralisation—A Urinary Stone from a Guinea Pig

et al. 2018

View full text Add to dashboard Cite

Abstract:Calcium carbonate is an abundant biomineral that is of great importance in industrial or geological contexts. In recent years, many studies of the precipitation of CaCO 3 have shown that amorphous precursors and intermediates are widespread in the biomineralization processes and can also be exploited in bio-inspired materials chemistry. In this work, the thorough investigation of a urinary stone of a guinea pig suggests that amorphous calcium carbonate (ACC) can play a role in pathological mineralization. Importantly, certain analytical techniques that are often applied in the corresponding analyses are sensitive only to crystalline CaCO 3 and can misleadingly exclude the relevance of calcium carbonate during the formation of urinary stones. Our analyses suggest that ACC is the major constituent of the particular stone studied, which possibly precipitated on struvite nuclei. Minor amounts of urea, other stable inorganics, and minor organic inclusions are observed as well.

show abstract

Calcium oxalates grown in human urine under different batch conditions

Cited by 18 publications

References 46 publications

Kinetic study of dehydration of calcium oxalate trihydrate

Kinetic study of dehydration of calcium oxalate trihydrate

Untitled

Indications that Amorphous Calcium Carbonates Occur in Pathological Mineralisation—A Urinary Stone from a Guinea Pig

Contact Info

Product

Resources

About