Effect of Serine and Arginine on the Phase Transition from Amorphous CaCO&lt;sub&gt;3&lt;/sub&gt; and CaCO&lt;sub&gt;3&lt;/sub&gt;&amp;middot;6H&lt;sub&gt;2&lt;/sub&gt;O to Calcite Film

The influence of amino acids of different nature (L-aspartic acid (L-asp) and L-arginine (L-arg)) on the morphology and size of calcium oxalate monohydrate crystals (COM), one of the main components of pathogenic organomineral aggregates in the human organism, is studied. Addition of L-asp and L-arg is found to inhibit the processes of COM crystal growth, thereby decreasing the crystal size by more than twice compared to pure COM crystals. The increase in the concentration of L-asp and L-arg amino acids in the reaction mixture to 4 × 10 −3 m and higher leads to the appearance of individual COM crystal. At 20 × 10 −3 m concentration of the amino acid, individual crystals of size between 3 to 5 µm are mainly formed. L-asp and L-arg amino acids can block the growth of the {121} face due to the formation of hydrogen bonds, and the growth of the {100} and {010} faces by electrostatic interaction.

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“…Lee et al . reported the influence of serine and arginine amino acids on the formation of calcite phase from amorphous calcium carbonate.…”

Section: Resultsmentioning

confidence: 99%

Effect of Charge State of L‐Aspartic and L‐Arginine Amino Acids on Morphology of Calcium Oxalate Monohydrate Crystals

Taranets

Притула

Bezkrovnaya

et al. 2018

Crystal Research and Technology

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“…Some iron-compounds were apparently below the detection limit (5%) [28]. Furthermore, in comparison with the unaltered stone (LY3), it is clear that the d-space values of the weathered stone objects (LY1) have a slight shift of ( 012), ( 202), ( 104) and ( 0012) peaks, and the structure change is always associated with acid corrosion [29,30].…”

Section: Resultsmentioning

confidence: 97%

Weathering mechanism of red discolorations on Limestone object: a case study from Lingyan Temple, Jinan, Shandong Province, China

et al. 2020

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Red discolorations are an effloresce phenomenon detect on the surface of stone objects and considered as damage factor in both esthetic and conservation points of view. It is very difficult to remove and seldom report about their weathering mechanism. Recently, numerous of red discolorations have affected the limestone objects of Lingyan Temple in Shandong province, one of the most important building materials in China. In order to set up the appropriate conservation remedy, it is essential to identify the origin, characteristics, composition, and the formation process of red discolorations. Several analytical and investigation techniques, such as X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), Micro-Raman spectroscopy (Raman), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS) were used to better understand the red discolorations. The results demonstrated that the discolorations on limestone surface have been caused by carbonic acid weathering process. The red discolorations consisted mainly of kutnohorite (Ca(Fe,Mg,Mn)CO3) and iron oxides. They showed tabular, lamellar, and granular morphologies, which originated from the in situ carbonic acid weathering of kutnohorite. After rainfall, the Ca, Mg, Mn ions with relatively high solubility were primarily leached from carbonatite phases. It was resulting in the sedimentation of red iron oxides through a chemical reaction and physical adhesion. Based on those analyses, a chelating agent (ethylenediamine tetraacetic acid disodium salt) was chosen to remove theses red discolorations on the stone object.

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“…However, a main broad peak at the vicinity of 2θ ! − 20-24° ( Figure 9b) showed an amorphous form (least stable form of calcium carbonate) [27] for calcium carbonates existing in the plant extract. This discrepancy shows that the crystals on the steel electrode surface in electrochemical experiments have a chemical, not plant, origin.…”

Section: Inhibition Of Scale Formation On Steel Surface By G Aretioimentioning

confidence: 99%

Assessment of aqueous extract of Gypsophila aretioides for inhibitory effects on calcium carbonate formation

Hajizadeh

Lotfabad

Bahmaei

2019

Green Processing and Synthesis

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The aqueous extract of Gypsophila aretioides roots as a “green” or eco-friendly inhibitor of carbonate calcium formation was investigated. The presence of chelating factors such as polyphenol compounds and foaming agents in the plant extract was assessed. Atomic absorption spectroscopy (AAS) demonstrated the ability of G. aretioides extract for dissolution of the carbonate calcium precipitates. Moreover, conductivity measurements revealed that the G. aretioides extract could efficiently retard sedimentation of carbonate calcium from a brine solution of calcium ions exposed to carbonate ions by adding Na2CO3 to the system solution. In addition, chronoamperometry was performed for a period of 3 h by polarizing the steel electrode to -0.9 V (vs. SCE) at 40°C. The presence of G. aretioides extract at a concentration of 10% (w/v) in chronoamperometry prevented the precipitation of CaCO3 on the steel electrode surface. This was confirmed by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analyses which showed an absence of precipitates and lack of calcium ions on the steel electrode after 3 h chronoamperometry, respectively. However, further studies are required in order to amend the characteristics of G. aretioides extract to render it more applicable as an eco-friendly, cost-effective, anti-scale agent for a wide range of industrial applications.

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Effect of Serine and Arginine on the Phase Transition from Amorphous CaCO<sub>3</sub> and CaCO<sub>3</sub>·6H<sub>2</sub>O to Calcite Film

Cited by 6 publications

References 29 publications

Effect of Charge State of L‐Aspartic and L‐Arginine Amino Acids on Morphology of Calcium Oxalate Monohydrate Crystals

Effect of Charge State of L‐Aspartic and L‐Arginine Amino Acids on Morphology of Calcium Oxalate Monohydrate Crystals

Weathering mechanism of red discolorations on Limestone object: a case study from Lingyan Temple, Jinan, Shandong Province, China

Assessment of aqueous extract of Gypsophila aretioides for inhibitory effects on calcium carbonate formation

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