Modulation of the calcium oxalate dihydrate to calcium oxalate monohydrate phase transition with citrate and zinc ions

CrystEngComm ◽  
2021 ◽  
Author(s):  
Jing Zhang ◽  
Wenjun Zhang ◽  
Christine V. Putnis ◽  
Lijun Wang
Keyword(s):  
Phase Transition ◽  
Calcium Oxalate ◽  
Protective Layer ◽  
Calcium Oxalate Monohydrate ◽  
Zinc Ions ◽  
Calcium Oxalate Dihydrate ◽  
Oxalate Dihydrate

Higher concentrations of Ca2+ and Ox2− can form COD which then transforms to COM. Citrate forms a protective layer to inhibit COD transition; whereas Zn2+ substitutes Ca2+ sites to generate a stable COD structure that retards COM formation.

Role of Magnesium in the Growth of Calcium Oxalate Monohydrate and Calcium Oxalate Dihydrate Crystals

1987 ◽  
Vol 42 (2) ◽  
pp. 89-93 ◽  
Author(s):  
Toshitsugu Oka ◽  
Toshiaki Yoshioka ◽  
Takuo Koide ◽  
Minato Takaha ◽  
Takao Sonoda
Keyword(s):  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Calcium Oxalate Dihydrate ◽  
Oxalate Dihydrate

Calcium Oxalate Dihydrate-Monohydrate Association in Grape (Vitis Vinifera) Endosperm

1982 ◽  
Vol 40 ◽  
pp. 154-155
Author(s):  
Mary Alice Webb ◽  
Howard J. Arnott
Keyword(s):  
Vitis Vinifera ◽  
Calcium Oxalate ◽  
Plant Species ◽  
Calcium Oxalate Monohydrate ◽  
Optical Methods ◽  
Calcium Oxalate Dihydrate ◽  
Characteristic Morphology ◽  
Oxalate Dihydrate

Calcium oxalate occurs in two forms, monohydrate (whewellite) and dihydrate (weddelite). Both forms occur intracellularly in plants, typically within vacuoles. In particular plant species a given tissue usually has crystals with specific and characteristic morphology. The occurrence of calcium oxalate monohydrate and dihydrate together in the same cell is thought to be extremely rare and has been reported only in Allium and Begonia. In vitro the dihydrate is unstable under certain conditions and may dissolve and reprecipitate as the monohydrate. In this paper we report observations of crystals isolated from grape (Vitis vinifera) endosperm. Using optical methods both calcium oxalate monohydrate and dihydrate, as well as dihydratemonohydrate associations, have been identified.

scholarly journals Identification of Calcium Oxalate Monohydrate Crystals by X-ray Diffraction in Urine of Ethylene Glycol-Intoxicated Dogs

1985 ◽  
Vol 22 (6) ◽  
pp. 625-628 ◽  
Author(s):  
M. A. Thrall ◽  
S. M. Dial ◽  
D. R. Winder
Keyword(s):  
Ethylene Glycol ◽  
Light Microscopy ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
X Ray Diffraction ◽  
Calcium Oxalate Dihydrate ◽  
X Ray ◽  
Oxalate Dihydrate ◽  
Ethylene Glycol Poisoning ◽  
Experimentally Induced

Urine sediments of dogs with experimentally induced ethylene glycol poisoning were examined by light microscopy and X-ray diffraction. Massive calcium oxalate crystalluria was observed in all poisoned dogs. By light microscopy, the frequency with which six-sided hippurate-like prisms and envelope forms of calcium oxalate dihydrate occurred was approximately equal. The hippurate-like crystals were shown to be calcium oxalate monohydrate by X-ray diffractometry.

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