Chemical process to separate iron oxides particles in pottery sample for EPR dating

Watanabe, Shigueo; Farias, T.M.B.; Gennari, Roseli Fernandes; Ferraz, Gilberto M.; Künzli, Ruth; Chubaci, J.F.D.

doi:10.1016/j.saa.2008.03.034

Cited by 16 publications

(5 citation statements)

References 4 publications

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“…Gelatin mineral analysis was determined by inductively coupled mass spectroscopy (ICP-MS) following the method from [45,46]. Samples with diameter smaller than 0.08 m were homogenized (ultrasound strainer) and digested in a mixture of 5:2 nitric and hydrofluoric acid in a microwave oven (100 plus DGT model-Provecto Analytic) and analyzed in a quadrupole ICP-MS system (PerkinElmer ELAN 6100).…”

Section: Determination Of Mineral Contents By the Icp-ms Techniquementioning

confidence: 99%

Valorization of Chicken Feet By-Product of the Poultry Industry: High Qualities of Gelatin and Biofilm from Extraction of Collagen

Santana

Gardim²,

Almeida

et al. 2020

Polymers

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In this research, products with high quality were obtained from natural sources. The sensorial qualities, chemical characterization, and physical properties of gelatin extracted from chicken feet were compared with commercial gelatins. The extraction process was performed using acetic acid on a concentration ranging from 0.318% to 3.682%, processing time between 1.0 h and 8.4 h and extraction temperature between 43.3 °C and 76.8 °C. After the end of each assay, the yield was measured. Results showed that, under the best conditions, the collagen extraction yield was above 8%, and comprised 78.525 g/100 g of protein. Collagen analyzed by ICP-MS was composed of 99.44% of macro-minerals that are of great importance to human health. ATR-FTIR analysis showed that approximately 70.90% of the total protein from chicken feet is collagen, whereas, in commercial gelatin, only 30.31% is collagen. When comparing chicken gelatin with commercial gelatin, most sensory attributes were similar and chicken gelatin gained acceptance by more than 80% of the consumers. Additionally, the collagen films obtained from chicken feet and swine showed water absorption, odors, and texture characteristics similar to commercial material, such as latex and celofane. Consequently, due to its similarity to human skin, it is possible to apply it as a biocurative.

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Section: Determination Of Mineral Contents By the Icp-ms Techniquementioning

confidence: 99%

Valorization of Chicken Feet By-Product of the Poultry Industry: High Qualities of Gelatin and Biofilm from Extraction of Collagen

Santana

Gardim²,

Almeida

et al. 2020

Polymers

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“…Clays have been used since ancient times as raw materials for ceramics [12], and they are composed of layered silicate minerals such as Si-O 4 , Al-O, and Mg-O arranged in a planar octahedron configuration. The nanoclays used in this study, Si-O 4 and Al-O, are montmorillonites that form a continuous sheet-like conformation.…”

Section: Introductionmentioning

confidence: 99%

Hepatotoxicity and Drug/Chemical Interaction Toxicity of Nanoclay Particles in Mice

et al. 2017

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Nanomaterials are relatively new and unconventional materials with many useful properties, but their effects on biological systems are poorly understood. Nanoclay is a general term for layered mineral silicate nanoparticles that are ideally suited for use in clay-based nanocomposites. The potential biological hazards of nanoclays have not been addressed, however. Therefore, we investigated the in vivo effects and drug interactions of nanoclays. In mice, administration of nanoclay particles via the tail vein led to acute liver injury. Co-administration of nanoclay and carbon tetrachloride, paraquat, or cisplatin resulted in both liver and kidney injury. Our findings thus indicate that nanoclay particles are potentially hepato- and nephrotoxic.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-017-1956-5) contains supplementary material, which is available to authorized users.

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“…The spectra are dominated by a strong positive peak below 1,000 gauss and a negative peak between 2,000 and 4,000 gauss. We attribute these features to the paramagnetic resonance of iron minerals, notably the Fe 3+ dipolar interaction, and indeed, these spectra bear resemblance to similar scans of iron-rich potteries similarly dominated by the Fe 3+ dipolar interaction (Watanabe et al 2008).…”

Section: Resultsmentioning

confidence: 66%

Micro- to nano-scale investigation of Precambrian metasediments: biogenicity and preservation in the 3.22 Ga Moodies Group (Barberton Greenstone Belt, S. Africa) and the 2.46 Ga Brockman Iron Formation (Hamersley Basin, W. Australia)

Bellón

Gieraltowski

Michaud

et al. 2023

Preprint

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Precambrian metasediments provide a unique archive for understanding Earth's earliest biosphere, however traces of microbial life preserved in ancient rocks are often controversial. In this study we leveraged several micro- to nano-scale techniques to study filamentous structures previously reported in clastic sediments of the 3.22 Ga Moodies Group, Barberton Greenstone Belt, S. Africa. We performed petrographic, mineralogical, electron microprobe, confocal fluorescence and electron microscopy analyses of these structures in order to evaluate their biogenicity and syngenecity. We also examined drill core samples of deep-water iron formations from the 2.46 Ga Joffre member of the Brockman Iron Formation (Hamersley Basin, W. Australia) to better understand their potential biogenicity. In both cases, we aimed to resolve primary vs. secondary mineral assemblages and their relation to filamentous or sedimentary structures. In the Moodies Group samples, filamentous structures were resolved by confocal imaging and revealed to be crosscut by later metamorphic phases, highlighting their syngenetic nature. Three-dimensional imaging reveals that while the filamentous structures are not necessarily associated with grain boundaries (e.g., as organic coatings), they form both sheets and filaments, complicating their interpretation but not ruling out a biological origin. No organic microstructures appeared to be preserved in our Dales Gorge samples. We also examined the possible application of electron paramagnetic resonance spectroscopy (EPR) to carbonaceous matter in ancient silica-rich matrices, similar to Bourbin et al. (2013), using samples from the Brockman iron formation. While resonance associated with organic matter was largely unresolvable in the Brockman iron formation samples due to their low organic matter contents, large effects on the EPR spectra were apparent stemming from the presence of magnetic iron minerals, highlighting the need to carefully consider sample composition in EPR analyses targeting ancient organic matter. Collectively, this study highlights the added value of micro- to nano-scale techniques as applied to Precambrian metasediments containing traces of ancient life, for example in revealing the pre-metamorphic emplacement and three-dimensional structure of filaments in the Moodies Group, but also the potential drawbacks and pitfalls, such as the case of strong magnetic mineral interference in EPR analysis of organic matter in trace abundance in the Dales Gorge.

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Chemical process to separate iron oxides particles in pottery sample for EPR dating

Cited by 16 publications

References 4 publications

Valorization of Chicken Feet By-Product of the Poultry Industry: High Qualities of Gelatin and Biofilm from Extraction of Collagen

Valorization of Chicken Feet By-Product of the Poultry Industry: High Qualities of Gelatin and Biofilm from Extraction of Collagen

Hepatotoxicity and Drug/Chemical Interaction Toxicity of Nanoclay Particles in Mice

Micro- to nano-scale investigation of Precambrian metasediments: biogenicity and preservation in the 3.22 Ga Moodies Group (Barberton Greenstone Belt, S. Africa) and the 2.46 Ga Brockman Iron Formation (Hamersley Basin, W. Australia)

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