Crystallization of calcium oxalate monohydrate at dipalmitoylphosphatidylcholine monolayers in the presence of chondroitin sulfate A

Ouyang, Jing; Deng, Sui‐Ping; Zhong, Jiuping; Tieke, Bernd; Yu, Shu‐Hong

doi:10.1016/j.jcrysgro.2004.06.058

Cited by 24 publications

(26 citation statements)

References 20 publications

(25 reference statements)

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“…Most of these crystals exhibit the morphology and structure that is typically described for COM crystals, i.e., hexagonal shape; size 5.0 × 2.0 µm; faces {100} and {010} that are wide and exposed; defined edges, among others [59]. Similar CaOx crystals have been obtained using membrane lipid rafts [15], phospholipid monolayers [60][61][62][63] and SAMs [21] as crystallization templates. We analysed our results considering three aminocompouds: aniline, 2-trifluoromethyl aniline, and 4 nitro-aniline as substances carrying non-polar, polar and acid moieties, respectively.…”

Section: Resultsmentioning

confidence: 69%

Effect of Diazotated Sulphonated Polystyrene Films on the Calcium Oxalate Crystallization

et al. 2017

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Pathological crystallization of calcium oxalate (CaOx) inside the urinary tract is called calculi or kidney stone (Urolithiasis). CaOx exhibits three crystalline types in nature: CaOx monohydrate COM, dihydrate COD and trihydrate COT. COD and COM are often found in urinary calculi, particularly COM. Langmuir monolayers, membrane vesicles, phospholipids' micelles, among others, have been adopted as simplified biomimetic template-models to study in vitro the urolithiasis through CaOx. The nucleation and crystal growth of COM on self-assembled lipid monolayers have revealed that the negatively charged phosphatidylserine interface is a strong promoter of COM. Herein, we describe the synthesis and physicochemical characterization of diazotated sulphonated polystyrene films (DSPFs), prepared from various aminocompounds varying their polarity degree i.e., polar, non-polar and acidic DSPF derivatives. We also used these DSPFs as polymeric templates in crystallization experiments of CaOx in vitro. Images obtained by optical microscopy and scanning electron microscopy confirmed the precipitation of COM crystals on the DSPF surface. The employment of functionalized polymeric films as templates for CaOx crystallization represents a viable approach for understanding inorganic mineralization.

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Section: Resultsmentioning

confidence: 69%

Effect of Diazotated Sulphonated Polystyrene Films on the Calcium Oxalate Crystallization

et al. 2017

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“…XRD result showed that these crystals were calcium oxalate monohydrate (COM). 6,9 That is, the injured LB films only induced the formation of COM crystals. The ring-shaped or solid circular patterns of COM crystals were formed on this film.…”

Section: Methodsmentioning

confidence: 99%

“…The supersaturated CaOxa subphase was prepared according to reference. 1,6 The final concentration of CaOxa was 0.30 mmol•L -1 . The DPPC monolayers were deposited by a dipping-withdrawing method at a speed of 10 mm/min onto two pieces of hydrophobic quartz or mica substrates at 10 mN/m at (20±1) ℃.…”

Section: Apparatusmentioning

confidence: 99%

“…After dipped in 0.60 mmol/L potassium oxalate solutions for 2 h, the substrates were taken out carefully and dried in a desiccator for 1 d. Then, one of the LB films was measured by the fluorescence microscope and the other one was placed horizontally at the air/water interface to induce crystal growth 5 and the headgroups of film molecules contacted the subsolutions. According to previous reference, 6 the final concentration of CaOxa solutions was c(Ca…”

Section: Apparatusmentioning

confidence: 99%

“…Especially, the phospholipid monolayers were used as models for domains of like lipids found at the outer surface of a membrane bilayer. 1,2,[6][7][8][9] Although the Langmuir-Blodgett (LB) technique has been used for decades, the applications of this method have been frustrated by the defects of LB films ranging from pinholes to larger scale reorganization of the layers. These defects can be induced by various factors.…”

Section: Introductionmentioning

confidence: 99%

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Induction of Ring‐Shaped Calcium Oxalate Patterns by Boundaries between Liquid Expanded Phase and Liquid Condensed Phase in Langmuir‐Blodgett Film

et al. 2008

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The formation of calcium oxalate kidney stones was related to injuries of renal epithelial membranes. The liquid condensed (LC) domains in Langmuir-Blodgett (LB) film of dipalmitoylphosphatidylcholine (DPPC) were used as a model system to induce crystal growth of urinary mineral calcium oxalate monohydrate (COM). The circular defective boundaries between the LC and liquid expanded (LE) phases of the DPPC monolayer could provide much more nucleating sites for crystallization of COM crystals. It induced ring-shaped or solid circular patterns of COM crystals on hydrophobic quartz substrates depending on the crystallization time.

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Aloe vera rind cellulose nanofibers‐reinforced films

Cheng

Panthapulakkal

Sain

et al. 2014

J of Applied Polymer Sci

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Aloe vera (AV) gel has been widely used in various medical, cosmetic, and nutraceutical applications. However, AV rind, the tougher outer layer of AV leaves where the cell wall components exists, is currently treated as a fertilizer or waste. This study aimed to investigate the potential of the AV rind as a resource for the production of cellulose nanofibers. Since a detailed analysis of the AV rind has been lacking, chemical composition of rind was analyzed before processing it into nanofibers. The results showed that AV rind has a high proportion of α‐cellulose (57.72% ± 2.18%). AV rind nanofibers (AVRNF) were prepared using chemi‐mechanical process. The morphological analyses showed that most of the isolated fibers were individual fibers under 20 nm. Crystallinity and degree of polymerization of the obtained AVRNF, and mechanical properties of the nanofibrous film were evaluated and compared with the wood nanofibers. Tensile strength of AVRNF film (102 MPa) was comparatively lower than the wood fibers (132 MPa), which was consistent with the lower crystallinity of AVRNF [crystallinity index (CI) = 0.66] as well as the lower degree of polymerization (DP = 396), compared with wood fibers (CI = 0.90, DP = 1297). © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40592.

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Crystallization of calcium oxalate monohydrate at dipalmitoylphosphatidylcholine monolayers in the presence of chondroitin sulfate A

Cited by 24 publications

References 20 publications

Effect of Diazotated Sulphonated Polystyrene Films on the Calcium Oxalate Crystallization

Effect of Diazotated Sulphonated Polystyrene Films on the Calcium Oxalate Crystallization

Induction of Ring‐Shaped Calcium Oxalate Patterns by Boundaries between Liquid Expanded Phase and Liquid Condensed Phase in Langmuir‐Blodgett Film

Aloe vera rind cellulose nanofibers‐reinforced films

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