A vibrational spectroscopic study of the phosphate mineral whiteite CaMn++Mg2Al2(PO4)4(OH)2·8(H2O)

Frost, Ray L.; Scholz, Ricardo; López, Andrés; Xi, Yunfei

doi:10.1016/j.saa.2014.01.053

Cited by 31 publications

(15 citation statements)

References 20 publications

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“…The absorbance due to bands corresponding to carbonate (about 1415 cm −1 ; Wright and Schwarcz ), phosphate (O antisymmetric stretching, 940–1110 cm –1 ; Frost et al . ; Lebon et al . ) and amide I of collagen (C=O stretch, 1590–1710 cm –1 ; Lebon et al .…”

Section: Deamidation In Archaeological Bonesmentioning

confidence: 99%

Collagen deamidation in archaeological bone as an assessment for relative decay rates

et al. 2019

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Attempts to extend methods for dating archaeological bones beyond that of radiocarbon dating, such as amino acid racemization, have met with limited success owing to the dependence on multiple environmental factors and controls. Despite facing similar challenges, deamidation of glutamine has recently been investigated as a potential indicator of 'thermal age' in archaeological bones, as well as a measure of their preservation quality. In this study, we undertook a series of simulated diagenetic experiments to understand the various factors affecting deamidation. Further, we analysed bones from different Middle Palaeolithic layers from Grotte Mandrin (France), with the results suggesting potential use of deamidation for relative dating, but only in case of extremely well-preserved layers. The results also suggested the possible use of attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy as a screening test for soluble collagen before proteomic analysis.

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Section: Deamidation In Archaeological Bonesmentioning

confidence: 99%

Collagen deamidation in archaeological bone as an assessment for relative decay rates

et al. 2019

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“…Peak 1066.28 cm -1 belongs to PO4 3-antisymmetric stretching frequency [37][38][39][40][41][42][43], 117267 cm -1 and 1052.22 cm -1 were also assigned to PO4 3antisymmetric stretching movement [44]. According to literature, Breitinger and co-workers emphasized that the deceptively simple strong vibrations centered at 1059 cm -1 including minimum four components of inorganic phosphate (PO4), were produced by removal of the threefold degeneracy of PO4 and activation of the general mode of phosphate (PO4) [44]. Furthermore, 629.77 cm -1 was detected in the spectrum, because a series of infrared bands such as 620 cm -1 , 643 cm -1 and 673 cm -1 were assigned to out of vibrations of plane bending vibrational mode of the phosphate anion (PO4 3-) and peak 892 cm -1 was associated with water vibrational modes [44].…”

Section: Ftir Analysismentioning

confidence: 97%

“…According to literature, Breitinger and co-workers emphasized that the deceptively simple strong vibrations centered at 1059 cm -1 including minimum four components of inorganic phosphate (PO4), were produced by removal of the threefold degeneracy of PO4 and activation of the general mode of phosphate (PO4) [44]. Furthermore, 629.77 cm -1 was detected in the spectrum, because a series of infrared bands such as 620 cm -1 , 643 cm -1 and 673 cm -1 were assigned to out of vibrations of plane bending vibrational mode of the phosphate anion (PO4 3-) and peak 892 cm -1 was associated with water vibrational modes [44]. Because the vibrational frequencies around 1577 cm -1 could be an overtone/combination band, the observed peak 1585.82 cm -1 was also considered as overtone and combination [44].…”

Section: Ftir Analysismentioning

confidence: 99%

“…Furthermore, 629.77 cm -1 was detected in the spectrum, because a series of infrared bands such as 620 cm -1 , 643 cm -1 and 673 cm -1 were assigned to out of vibrations of plane bending vibrational mode of the phosphate anion (PO4 3-) and peak 892 cm -1 was associated with water vibrational modes [44]. Because the vibrational frequencies around 1577 cm -1 could be an overtone/combination band, the observed peak 1585.82 cm -1 was also considered as overtone and combination [44].…”

Section: Ftir Analysismentioning

confidence: 99%

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Design, synthesis, structural characterization and cell cytotoxicity of a new derivative poly(maleic anhydride-co-vinyl acetate)/miltefosine polymer/drug conjugate

Karakuş

Polat

Karahan

2019

BCC

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In recent years, polymeric systems are selected as biomaterials because of their desired biocompatible properties and easy design/preparation of a number of different structures with lower toxicity and good solubility. Nontoxic polymeric drug carrier, maleic anhydride-co-vinyl acetate copolymer (MAVA), was prepared via free-radical chain polymerization at 80±0.1 ºC. MEK (methyl ethyl ketone) and BPO (benzoyl peroxide) were used as the organic medium and radical initiator, respectively. Copolymer was conjugated with a broad-spectrum antimicrobial agent, miltefosine (MF, an oral drug in the treatment of leishmaniosis), Impavido® and Miltex®, 1:1 molar ratio of copolymer:drug for 48 h at 60 °C in aqueous medium in presence of N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride (EDAC). Fourier transform infrared (FTIR) and nuclear magnetic resonance (1H- and 31P-NMR) were used to characterize the structure of the copolymer and MAVA/MF conjugate. Molecular weights were measured via size-exclusion chromatography (SEC). Results, obtained from the spectroscopic and SEC analysis, verified that conjugation was successfully carried out with good water-solubility. WST-1 cytotoxicity tests, 24 h by quantitative analysis, were carried out for copolymer, miltefosine, and MAVA/MF. The cytotoxicity values, by comparing with control group, were found statistically significantly different (P<0.05). MAVA/MF copolymer/drug couple was successfully designed with lower cytotoxicity than the free drug (MF).

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“…The mineral pseudolaueite of formula Mn 2 Raman spectroscopy has proven very useful for the study of minerals, especially minerals containing oxyanions such as phosphate [7][8][9][10][11][12][13][14]. This paper is a part of systematic studies of vibrational spectra of minerals of secondary origin in the oxide supergene zone.…”

Section: Introductionmentioning

confidence: 99%

A Raman and Infrared Spectroscopic Study of the Phosphate Mineral Pseudolaueite and in Comparison with Strunzite and Ferrostrunzite

2015

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The Raman spectra of pseudolaueite, strunzite, ferrostrunzite and ferristrunzite have been obtained at 298 K using Raman microscopy. These spectra are compared with their infrared spectra. The vibrational spectra of the four minerals are different, in line with differences in crystal structure and composition. Some similarity in the Raman spectra of the hydroxyl-stretching region exists, particularly but characteristic differences in the OH deformation regions are observed. Differences are also observed in the phosphate stretching and deformation regions. Graphical Abstract This paper offers new knowledge and understanding of the mineral pseudolaueite of formula Mn 2? Fe 2 3? (PO 4 ) 2 (OH) 2 Á8H 2 O,a hydrated hydroxy phosphate of ferric iron and manganese.

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A vibrational spectroscopic study of the phosphate mineral whiteite CaMn++Mg2Al2(PO4)4(OH)2·8(H2O)

Cited by 31 publications

References 20 publications

Collagen deamidation in archaeological bone as an assessment for relative decay rates

Collagen deamidation in archaeological bone as an assessment for relative decay rates

Design, synthesis, structural characterization and cell cytotoxicity of a new derivative poly(maleic anhydride-co-vinyl acetate)/miltefosine polymer/drug conjugate

A Raman and Infrared Spectroscopic Study of the Phosphate Mineral Pseudolaueite and in Comparison with Strunzite and Ferrostrunzite

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