In vitro crystallization, characterization and growth-inhibition study of urinary type struvite crystals

Chauhan, Chetan; Joshi, Mayank

doi:10.1016/j.jcrysgro.2011.11.008

Cited by 90 publications

(44 citation statements)

References 35 publications

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“…[22] In the cases of ammonium struvite-like NH 4 MPO 4 ·6H 2 O (M = Mg, Co, Ni) the one-step dehydration of the six water molecules is concomitant with the simultaneous release of NH 3 resulting in the formation of intermediate acid phosphates, MHPO 4 . [23][24][25][26] At a higher temperature MHPO 4 undergoes an intermolecular dehydration producing the respective pyrophosphate salts, M 2 P 2 O 7 , as final products. [23][24][25][26] It is worth mentioning that the experimental mass loss observed for MgKAsO 4 ·6H 2 O (Figure 3) is slightly lower than the theoretical one (32.62 % versus 34.79 % for the release of six water molecules) and the calculation gives 5.4 water molecules instead of 6.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

“…[23][24][25][26] At a higher temperature MHPO 4 undergoes an intermolecular dehydration producing the respective pyrophosphate salts, M 2 P 2 O 7 , as final products. [23][24][25][26] It is worth mentioning that the experimental mass loss observed for MgKAsO 4 ·6H 2 O (Figure 3) is slightly lower than the theoretical one (32.62 % versus 34.79 % for the release of six water molecules) and the calculation gives 5.4 water molecules instead of 6. Similar findings have already been reported for other magnesium struvite-like MgKPO 4 ·6H 2 O [22] and MgNH 4 PO 4 ·6H 2 O.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

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Preparation, Structural, Thermogravimetric and Spectroscopic Study of Magnesium Potassium Arsenate Hexahydrate

Abdija¹,

Najdoski²,

Koleva³

et al. 2014

Zeitschrift anorg allge chemie

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The crystal structure of magnesium potassium arsenate hexahydrate, MgKAsO 4 ·6H 2 O, was refined from powder diffraction data. MgKAsO 4 ·6H 2 O crystallizes in the orthorhombic space group Pmn2 1 with Z = 2, as the biomineral struvite. Complete dehydration of MgKAsO 4 ·6H 2 O proceeds in a single step, with one endothermic * Prof. Dr. V. Stefov Fax: +389-23226-865 E-Mail: viktorst@pmf.ukim.mk [a]

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Section: Thermogravimetric Analysismentioning

confidence: 99%

Section: Thermogravimetric Analysismentioning

confidence: 99%

Preparation, Structural, Thermogravimetric and Spectroscopic Study of Magnesium Potassium Arsenate Hexahydrate

Abdija¹,

Najdoski²,

Koleva³

et al. 2014

Zeitschrift anorg allge chemie

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“…This method enables a continuous observation of the crystal growth (Chauhan and Joshi, 2013;Chauhan, 2011;Rajendran and Keefe, 2010).…”

Section: Methodsmentioning

confidence: 99%

Inhibition of Struvite Crystal Growth in the Presence of Herbal ExtractOrthosiphon AristatusBL.MIQ

Muryanto

Sutanti²,

Kasmiyatun

2016

MATEC Web of Conferences

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The formation of urinary stones is a serious problem worldwide. Struvite (MgNH4PO4.6H2O) is known as one of the main components of the stones. Traditionally, herbal extracts treatment is recommended. This paper discusses the effects of Orthosiphon aristatus Bl.Miq leaves extract (OA) on struvite crystals grown by diffusion gel method. After three weeks the crystals were separated from the gel, air dried and stored for characterisation. The crystals exhibit different morphologies depending upon the location of growth. It was found that OA caused the crystals to have noticeable surface defects, discolorisation and fragmentation. Also, OA (up to 5.0%) decreased the growth rate. XRD analysis confirms struvite crystallinity. Pure crystals and those grown with OA showed identical XRD pattern, indicating that the crystalline nature may be unaffected. For crystals with OA, FTIR spectrum shifted to higher wave numbers, implying that the various organic compounds in OA might be absorbed on the crystal surface. TG-DTA studies showed similar thermal behaviour for both pure crystals and those with OA. However, the later revealed lower endothermic temperature, indicating lower thermal stability. Fragmentation and lower thermal stability of struvite indicated that OA was a potent inhibitor of struvite and could be effective for urinary stone treatment.

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“…Urolithiasis is the formation of urinary calculi, known as renal kidney stone, which is one of the serious and debilitating problems in the world [1]. The formations of stones have high supersaturation characteristics, because supersaturation is the driving force for crystal formation and growth [2].…”

Section: Introductionmentioning

confidence: 99%

“…newberyite, is the common constituents of magnesium phosphates crystals. They are reported in vesicle as well as renal calculi of adults [1] [9] [10] and children [11]- [13]. Of these, newberyite is a very rare crystalline component of urinary calculi [14], while struvite is mostly found in urine [15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Struvite-k Crystals by Agar Gel

Suryawanshi¹,

Chaudhari²

2014

JCPT

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The phosphate mineral struvite is basically formed in urinary tracks and kidney. One of the analogous compounds of struvite is potassium magnesium phosphate hexahydrate (KMgPO 4 •6H 2 O), known as struvite-k crystal and found in animal urinary calculi. In the present investigation, struvite-k crystals were grown by single diffusion and double diffusion techniques in agar gelmedium. The grown crystals were analyzed by optical microscopy, scanning electron microscopy (SEM), fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), energy dispersive X-ray analysis (EDXA) and thermogravimetric analysis (TGA). Optical microscopy and SEM exhibited the different morphologies. The FTIR spectra revealed the presence of water molecules, stretching and bending vibrations of phosphate (PO4) ions. However the powder XRD results from the crystalline nature. Elemental composition in the crystal was obtained by EDXA, while 36.89% weight loss of water molecules is observed in TGA study.

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In vitro crystallization, characterization and growth-inhibition study of urinary type struvite crystals

Cited by 90 publications

References 35 publications

Preparation, Structural, Thermogravimetric and Spectroscopic Study of Magnesium Potassium Arsenate Hexahydrate

Preparation, Structural, Thermogravimetric and Spectroscopic Study of Magnesium Potassium Arsenate Hexahydrate

Inhibition of Struvite Crystal Growth in the Presence of Herbal ExtractOrthosiphon AristatusBL.MIQ

Synthesis and Characterization of Struvite-k Crystals by Agar Gel

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