FTIR spectroscopic study of human urinary stones from El Bayadh district (Algeria)

Sekkoum, Khaled; Cheriti, Abdelkrim; Taleb, Safia; Belboukhari, Nasser

doi:10.1016/j.arabjc.2011.10.010

Cited by 43 publications

(37 citation statements)

References 17 publications

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“…The peak at 506 cm −1 indicates RuO stretching vibration of RuO 2 metal oxides inside RuO 2 /Fullerene nanocomposite. The peaks at 514, 557, and 563‐565 cm −1 are assigned to bending of plane, CO bonds and CCC plane bending stretching, respectively. The peak at 1166 cm −1 refer to CO stretching vibration .…”

Section: Resultsmentioning

confidence: 99%

Supercapacitor performances of RuO₂/MWCNT, RuO₂/Fullerene nanocomposites

et al. 2019

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In this study, RuO2/Fullerene and RuO2/MWCNT nanocomposites were synthesized to use as an electroactive materials in symmetric supercapacitor device performances. The materials were examined via Fourier transform infrared spectroscopy‐attenuated total reflectance (FTIR‐ATR), thermo‐gravimetric analysis (TGA‐DTA), scanning electron microscopy‐energy dispersive X‐ray analysis (SEM‐EDX), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The RuO2/MWCNT and RuO2/Fullerene nanocomposite electrodes show good electrochemical performances. For instance, the highest specific capacitance of RuO2/Fullerene and RuO2/MWCNT electrodes reaches Csp = 3895.11 and 1662.19 F/g at 1 mV/s within the potential range of 0.8 V in 1 M H2SO4 solution. RuO2/MWCNT and RuO2/Fullerene nanocomposites have good cycle stability ~100% specific capacitance at [RuO2]o/[MWCNT]o = 1:1; 2:1 and [RuO2]o/[Fullerene]o = 2:1, respectively. The different equivalent circuit models of LR1Q(C1R2) and LR1(Q1R2)(Q2R3) were used to interpret EIS data.

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Section: Resultsmentioning

confidence: 99%

Supercapacitor performances of RuO₂/MWCNT, RuO₂/Fullerene nanocomposites

et al. 2019

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“…The FTIR-ATR spectrometer has high sensitivity and simple analysis for the molecular composition of small samples. This tool is widely used to characterize kidney stones in powder samples [17][18][19][20][21][22][23][24]. Each point reviewed in the sample will provide specific information [27].…”

Section: Discussionmentioning

confidence: 99%

A Spatial Distribution Analysis on the Deposition Mechanism Complexity of the Organic Material of Kidney Stone

Warty

Haryanto

Fitri

et al. 2020

jape

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Background: Kidney stones in the urinary system are formed from complex minerals that can interfere with the function of the kidney. This formation occurs gradually and can be observed from the appearance of the kidney stones cross-section which are cut along its longitudinal axis resembling a tree cambium. A deeper study on the composition of these layers will provide etiological and pathophysiological information on the mechanism of the formation and development of kidney stones. In addition, an accurate analysis on the composition of the kidney stone can provide a scientific basis to determine the choice of medical treatment and efforts to prevent from forming of kidney stones in humans.Objective: This study aimed to analyze the organic material that makes up kidney stones in each layer. Material and Methods:In this analytical study, the components and morphological properties of five kidney stones in each layer were characterized using Fourier transform infrared-attenuated total reflection (FTIR-ATR) and Scanning Elecron Microscope-Element Distribution Analysis (SEM-EDS).Results: FTIR-ATR displayed the typical absorption peaks for each stone constituent component. The components of each layer showed the same peak value for each absorption peak which consisted of calcium oxalate monohydrate, struvite, ammonium ion calcium oxalate monohydrate, calcium oxalate monohydrate-calcium phosphate and uric acid. Meanwhile, the difference in the percentage and composition of the elements in each stone can be observed by SEM-EDS. Conclusion:From this study, it can be concluded that each layer of the kidney stones has a different percentage and composition of elements.

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“…The adjustment averaged 5 to 10 cm -1 . The mineral composition of the stone was evaluated based on the identification of the infrared absorption bands which were specific to certain chemical compounds ( 12 , 13 ). The intensity of the absorption bands, the characteristics of the maxima, and the transmission level were also determined.…”

Section: Methodsmentioning

confidence: 99%

Structure Types of Kidney Stones and Their Susceptibility to Shock Wave Fragmentation

Kolupayev¹,

Lesovoy²,

Bereznyak³

et al. 2021

Acta Inform Med

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Background: The modern approach in the treatment of urolithiasis involves the use of non-invasive and minimally invasive techniques based on the stone fragmentation, among which shock wave lithotripsy (SWL) is considered as the first-line treatment for kidney stones < 2 cm and proximal ureter stones. Objective: To study the microstructure and mineral composition of kidney stones and to evaluate their influence on the stones’ susceptibility to fragmentation by shock waves. Methods: The microstructure and mineral composition of kidney stone samples obtained from shock wave lithotripsy in 87 patients were studied using crystal optical analysis and infrared spectroscopy. The volume fraction of amorphous and crystalline phases of the stone composition, the quantitative and qualitative composition of mineral components were assessed. The fragmentation features of stones with different microstructure were retrospectively analyzed based on the total number of shock waves required for complete stone fragmentation. Results: Three kidney stone structure types were identified: amorphous-crystalline structure stones predominantly including the amorphous phase (type A); amorphous-crystalline structure stones predominantly including the crystalline phase (type B); fully crystalline structure stones (type C). Significant positive correlation between the total number of shock waves required for complete stone fragmentation and the volume fraction of crystalline phase was found. Conclusion: The structure type of kidney stones is determined by the volume ratio between the amorphous and crystalline phases of their composition. The amorphous-crystalline structure stones with the predominant content of the amorphous phase are more sensitive to shock-wave exposure. The increase in the volume fraction of crystalline phase in the stone structure reduces the stone’s susceptibility to fragmentation by shock waves.

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FTIR spectroscopic study of human urinary stones from El Bayadh district (Algeria)

Cited by 43 publications

References 17 publications

Supercapacitor performances of RuO₂/MWCNT, RuO₂/Fullerene nanocomposites

Supercapacitor performances of RuO₂/MWCNT, RuO₂/Fullerene nanocomposites

A Spatial Distribution Analysis on the Deposition Mechanism Complexity of the Organic Material of Kidney Stone

Structure Types of Kidney Stones and Their Susceptibility to Shock Wave Fragmentation

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FTIR spectroscopic study of human urinary stones from El Bayadh district (Algeria)

Cited by 43 publications

References 17 publications

Supercapacitor performances of RuO2/MWCNT, RuO2/Fullerene nanocomposites

Supercapacitor performances of RuO2/MWCNT, RuO2/Fullerene nanocomposites

A Spatial Distribution Analysis on the Deposition Mechanism Complexity of the Organic Material of Kidney Stone

Structure Types of Kidney Stones and Their Susceptibility to Shock Wave Fragmentation

Contact Info

Product

Resources

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Supercapacitor performances of RuO₂/MWCNT, RuO₂/Fullerene nanocomposites

Supercapacitor performances of RuO₂/MWCNT, RuO₂/Fullerene nanocomposites