Changes in the characteristics of acid-treated clay after the inclusion of proteins

Rangel-Porras, Gustavo; Rangel-Rivera, P.; Pfeiffer, Heriberto; González-Muñoz, Pilar

doi:10.1002/sia.5685

Cited by 8 publications

(2 citation statements)

References 40 publications

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“…We successfully applied the combined FTIR and TG approach to study the interaction of proteins with inorganic salts [24,27,43] and in the literature, these techniques have been applied to study protein-clay interactions [48]. Various spectroscopic techniques (NMR, fluorescence, and circular dichroism) are currently used to study protein structural conformations in solution.…”

Section: β-mentioning

confidence: 99%

Loading of halloysite nanotubes with BSA,α-Lac andβ-Lg: a Fourier transform infrared spectroscopic and thermogravimetric study

et al. 2016

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Halloysite nanotubes (HNTs) are considered as ideal materials for biotechnological and medical applications. An important feature of halloysite is that it has a different surface chemistry on the inner and outer sides of the tubes. This property means that negatively-charged molecules can be selectively loaded inside the halloysite nanoscale its lumen. Loaded HNTs can be used for the controlled or sustained release of proteins, drugs, bioactive molecules and other agents. We studied the interaction between HNTs and bovine serum albumin, α lactalbumin and β -lactoglobulin loaded into HTNs using Fourier transform infrared spectroscopy and thermogravimetry. These techniques enabled us to study the protein conformation and thermal stability, respectively, and to estimate the amount of protein loaded into the HNTs. TEM images confirmed the loading of proteins into HTNs.

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Section: β-mentioning

confidence: 99%

Loading of halloysite nanotubes with BSA,α-Lac andβ-Lg: a Fourier transform infrared spectroscopic and thermogravimetric study

et al. 2016

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“…В сельском хозяйстве их применяют для снижения уровня токсичного воздействия металлов-поллютантов и радионуклидов на организм животных [4]. Зарубежные исследователи активно изучают сорбционную способность природных минералов, главным образом, монтмориллонитов и вермикулитов [5][6][7][8][9][10].…”

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Sorption of metals on glauconite in conditions of gastrointestinal tract of calves

Filippova

Kiiko

Maslova

2019

Rossiiskaia selskokhoziaistvennaia nauka

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The ion-exchange properties of the enterosorbent prepared on the basis of a modified concentrate (50%) of glauconite from the Bondar deposit were studied under conditions of passage of calves through the gastrointestinal tract.Chemical modification of the mineral was carried out by transfer to the Na-form.Experienced calves daily for 6 and 9 days fed enterosorbent in the amount of 0.2 g/kg body weight. The character of excretion with excrement of metal ions accumulated on the active surface of glauconite was studied. The results of the assessment of its sorption capacity in relation to Ni (toxicant), Cu (micronutrient) and Ca (macronutrient) are presented.The sorbent showed high efficiency against nickel - up to 60% of the total amount is excreted from animals. With respect to copper, average efficiency (13%). The sorbent accumulates in the digestive tract of animals for 3-4 days.Under the conditions of copper deficiency in the ration feed, this contributes to its better assimilation from inorganic forms. Feeding animals with an enterosorbent at the indicated dose does not affect the excretion of calcium from their bodies.

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Effects of the Inclusion of Ce and Ni Species on Ti for Modification of K10-Clay by Sol-Gel and their Use as Catalysts in the Liquid-Phase Esterification Systems

Rangel-Porras

Quiroga-Almaguer

Ramírez-Hernández

et al. 2023

Clays and clay miner.

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The modification of montmorillonite with metallic species affects directly its crystalline structure, texture, porosity, and surface. The interaction of the metallic molecules with the clay matrix, derived from the modification pathway and the characteristics of the adsorbate, modifies the physicochemical properties of montmorillonite, enabling the creation of materials with varied characteristics to be used both as catalysts and adsorbents. Small amounts of metallic species can confer various structural and physicochemical characteristics on the same montmorillonite matrix, depending on the metal incorporated. The objective of the present study was to create an acid-base catalyst based on montmorillonite K10 (K10 Mnt), modified with Ti, Ce, and Ni, for the catalytic esterification of acetic acid and penta-1-ol. K10-Mnt was modified using particles of Ti and of Ti modified with Ce and Ni. The effect of the inclusion of Ti and modified Ti species on the transformation of the physicochemical properties of the K10 Mnt and their contributions to the catalytic esterification syntheses were investigated. Samples were characterized by scanning electron microscopy coupled to an energy-dispersive X-ray spectroscopy system (SEM-EDS), powder X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), physisorption of N2 at 77 K (BET and BJH), and thermogravimetric analysis (TGA-DTGA). Finally, the original and modified K10 Mnt samples were tested for their catalytic esterification of acetic acid and penta-1-ol in the liquid phase.

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Changes in the characteristics of acid-treated clay after the inclusion of proteins

Cited by 8 publications

References 40 publications

Loading of halloysite nanotubes with BSA,α-Lac andβ-Lg: a Fourier transform infrared spectroscopic and thermogravimetric study

Loading of halloysite nanotubes with BSA,α-Lac andβ-Lg: a Fourier transform infrared spectroscopic and thermogravimetric study

Sorption of metals on glauconite in conditions of gastrointestinal tract of calves

Effects of the Inclusion of Ce and Ni Species on Ti for Modification of K10-Clay by Sol-Gel and their Use as Catalysts in the Liquid-Phase Esterification Systems

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