The Effect of Glycosaminoglycans on Calcium Oxalate Monohydrate Crystal Morphology

1994 ◽  
pp. 189-191
Author(s):  
Y. Shirane ◽  
A. Yamamoto ◽  
S. Kagawa
Keyword(s):  
Calcium Oxalate ◽  
Crystal Morphology ◽  
Calcium Oxalate Monohydrate

Raman Spectroscopy Study of Calcium Oxalate Extracted from Cacti Stems

2014 ◽  
Vol 68 (11) ◽  
pp. 1260-1265 ◽  
Author(s):  
Claudio Frausto-Reyes ◽  
Sofia Loza-Cornejo ◽  
Tania Terrazas ◽  
María de la Luz Miranda-Beltrán ◽  
Xóchitl Aparicio-Fernández ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Calcium Oxalate ◽  
Near Infrared ◽  
Crystal Morphology ◽  
Calcium Oxalate Monohydrate ◽  
Spectroscopic Technique ◽  
Spectroscopy Study ◽  
Natural Habitats ◽  
Calcium Oxalate Dihydrate ◽  
Opuntia Species

To find markers that distinguish the different Cactaceae species, by using near infrared Raman spectroscopy and scanning electron microscopy, we studied the occurrence, in the stem, of solid deposits in five Cactaceae species ( Coryphantha clavata, Ferocactus latispinus, Opuntia ficus-indica, O. robusta, and O. strepthacantha) collected from their natural habitats from a region of México. The deposits in the tissues usually occurred as spheroidal aggregates, druses, or prismatic crystals. From the Raman spectra, the crystals were identified either as calcium oxalate monohydrate (CaC2O4H2O) or calcium oxalate dihydrate (CaC2O4·2H2O) Opuntia species (subfamily Opuntioideae) showed the presence of CaC2O4·H2O, and the deposition of CaC2O4·2H2O was present in C. clavata and F. latispinus (subfamily Cactoideae, Cacteae tribe). As a punctual technique, Raman spectroscopy seems to be a useful tool to identify crystal composition. In addition to allowing the analysis of crystal morphology, this spectroscopic technique can be used to identify Cactaceae species and their chemotaxonomy.

scholarly journals Can stone composition be predicted by plain X-ray and/or non-contrast CT? A study validated by X-ray diffraction analysis

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Mohamed Gadelmoula ◽  
Ahmed M. Moeen ◽  
Ahmed Elderwy ◽  
Mohamed S. Abdel-Kader ◽  
Ayman Elqady ◽  
...  
Keyword(s):  
Calcium Oxalate ◽  
Diffraction Analysis ◽  
Great Influence ◽  
Calcium Oxalate Monohydrate ◽  
Categorical Variables ◽  
Stone Analysis ◽  
Stone Composition ◽  
Cutoff Value ◽  
X Ray ◽  
Contrast Ct

Abstract Background The stone composition has a great influence on the outcome of its treatment. There are several tests to predict the composition of stones preoperatively and stone analysis postoperatively. Herein, we want to evaluate if the stone composition could be predicted from plain X-ray KUB (PKUB) and/or non-contrast CT (NCCT) validated by in vitro X-ray powder diffraction analysis (XRD). Methods Between April 2014 and March 2016, 100 cases with urinary tract stones were included in the study. The radio-opacity of the stones in PKUB, stone density by NCCT, and after stone extraction, XRD were performed. Statistical analysis for the results was performed using Chi-square and Fisher exact tests for categorical variables and Mann–Whitney U and Kruskal–Wallis H for the nonparametric variables. The receiver operating characteristic curve was constructed to determine the best cutoff value. Results This study included 74 males and 26 females with a median age of 32 years (range 2–70). Regarding the radio-opacity by PKUB, there were 30 stones dense opaque, 44 opaque, 21 faint opaque, and 5 radiolucent. XRD revealed 97 mixed and 3 pure stones. The calcium oxalate monohydrate (COM) stone composition could be predicted in dense opaque stone by PKUB in 75.9% and urate composition in the radiolucent stone by 40%. The cutoff value of HU density by NCCT to the dense opaque stones in the PKUB was > 1020 and for radiolucent stones was < 590. Conclusion Stone radio-opacity by PKUB and its attenuation value by NCCT could successfully predict its calcium oxalate monohydrate, struvite, and urate composition. However, the chemical stone analysis is still required as most stones are mixed.

Surface effects in the crystal growth of calcium oxalate monohydrate

1987 ◽  
Vol 118 (2) ◽  
pp. 379-386 ◽  
Author(s):  
R.P. Singh ◽  
S.S. Gaur ◽  
D.J. White ◽  
G.H. Nancollas
Keyword(s):  
Crystal Growth ◽  
Calcium Oxalate ◽  
Surface Effects ◽  
Calcium Oxalate Monohydrate

scholarly journals Inhibition of calcium oxalate monohydrate by poly(acrylic acid)s with different end groups

2003 ◽  
Vol 91 (3) ◽  
pp. 2035-2041 ◽  
Author(s):  
W. O. S. Doherty ◽  
C. M. Fellows ◽  
S. Gorjian ◽  
E. Senogles ◽  
W. H. Cheung
Keyword(s):  
Acrylic Acid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
End Groups ◽  
Poly Acrylic Acid

Oxalic acid and calcium oxalate produced by Leucostoma cincta and L. persoonii in culture and in peach bark tissues

1987 ◽  
Vol 65 (9) ◽  
pp. 1952-1956 ◽  
Author(s):  
J. A. Traquair
Keyword(s):  
Oxalic Acid ◽  
Calcium Oxalate ◽  
Crystal Morphology ◽  
Culture Media ◽  
Positive Staining ◽  
Acid Solutions ◽  
Calcium Oxalate Crystals ◽  
Oxalate Crystals ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes

Oxalic acid and crystals of calcium oxalate were produced during growth of Leucostoma cincta and L. persoonii on potato dextrose agar and in peach bark tissues. The identification of calcium oxalate was based on solubility characteristics, the results of KMnO4 titration, positive staining with silver nitrate – dithiooxamide, and crystal morphology as observed with light and scanning electron microscopes. Oxalic acid was detected by gas chromatography. This is the first report of oxalic acid production by both Leucostoma species causing peach canker. Calcium oxalate crystals observed on or near hyphae in culture were similar to crystals in artificially inoculated peach bark tissues. Addition of oxalic acid solutions alone to inner bark tissues caused maceration and necrosis. These results indicate a role for oxalic acid in the early stages of pathogenesis by Leucostoma spp. Tetragonal (bipyramidal) and prismatic calcium oxalate crystals formed on bark wounds treated with oxalic acid solutions were similar to those observed in infected tissues and in culture media amended with oxalic acid.

Discriminating the formation origin of calcium oxalate monohydrate in kidney stones via synchrotron microdiffraction

The Analyst ◽  
2022 ◽  
Author(s):  
Iris H.Valido ◽  
Victor Fuentes-Cebrian ◽  
Roberto Boada ◽  
Oriol Vallcorba ◽  
Montserrat Resina-Gallego ◽  
...  
Keyword(s):  
Calcium Oxalate ◽  
Kidney Stones ◽  
Calcium Oxalate Monohydrate

Nephrolithiasis is a multifactor disease that produces nephrolites in the kidney. Calcium oxalate hydrates (dihydrated, COD, or monohydrated, COM) stones are the most common ones with more than sixty percent...

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