Study on the effect of organic phosphonic compounds on disulfide bonds in wool

Li, Bo; Yang, Jinbo; Niu, Jiarong; Liu, Jianyong; Wang, Le; Feng, Mang; Sun, Yanli

doi:10.1177/0040517518798652

Cited by 23 publications

(10 citation statements)

References 33 publications

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“…It is known that wool keratin is composed of 17 different amino acids, and the top five amino acids in the content are glutamic acid, proline, arginine, leucine, and serine. 28 Although the cystine content of wool keratin is affected by hydrochloric acid used for the hydrolysis of wool fibers, 54 the contents of other amino acids are in accordance with previous studies. 28 For the P-T-T composite, 17 amino acids remain, but the amount of each is significantly reduced in comparison with those in original wool fibers.…”

Section: Figures S3d−f and 5d−f Show The Photocatalytic Behaviors Of ...supporting

confidence: 88%

Selective Photocatalytic Activities of Amino Acids/Peptide-Ti₃C₂T_x-TiO₂ Composites Induced by Calcination: Adsorption Enhancement vs Charge Transfer Enhancement

et al. 2023

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A ternary component photocatalyst composed of amino acids/peptide, Ti 3 C 2 T x , and TiO 2 was created by incorporating peptide chains of wool keratin between T i 3 C 2 T x nanosheets and TiO 2 nanoparticles through the combination of both low-temperature vibration-assisted grinding process for making Ti 3 C 2 T x nanosheets and hydrothermal synthesis process for producing TiO 2 nanoparticles. The as-obtained amino acid/ peptide-Ti 3 C 2 T x -TiO 2 (P-T-T) composite was further calcined under nitrogen gas protection condition to produce calcined P-T-T composite photocatalysts (CP-T-T). The photocatalytic properties of the control Ti 3 C 2 T x -TiO 2 (T-T), P-T-T, and calcined P-T-T (CP-T-T) composites were evaluated by examining their performance in the photodegradation of C.I. Reactive Blue 194 dye, tetracycline hydrochloride, and levofloxacin antibiotics. First-principles calculations were performed to verify the experimental results. It was concluded that in comparison with the T-T and P-T-T composites, the CP-T-T composite showed a significantly better photocatalytic activity in the decomposition of C.I. Reactive Blue 194. This was ascribed to the large Brunauer−Emmett− Teller (BET) specific surface area, the presence of micropores and mesopores, the narrowed band gap with an internal electric field (IEF), and the intimate contacts among the peptide, Ti 3 C 2 T x , and TiO 2 , which resulted in the fast transfer and separation of charge carriers in the photocatalytic activity of the composite. The P-T-T and CP-T-T composite photocatalysts have shown different photodegradation pathways when degrading the C.I. Reactive Blue 194 dyes. The peptide chains of wool keratin led to the redistribution of the electron accumulation and depletion on the peptide, Ti 3 C 2 T x , and TiO 2 , which changed the direction of IEF in the composite. It is interestingly noted that, when degrading C.I. Reactive Blue 194, the P-T-T composite photocatalysts showed an adsorption-mediated photocatalytic degradation while CP-T-T composite photocatalysts showed an charge transfer-mediated photocatalytic degradation.

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Section: Figures S3d−f and 5d−f Show The Photocatalytic Behaviors Of ...supporting

confidence: 88%

Selective Photocatalytic Activities of Amino Acids/Peptide-Ti₃C₂T_x-TiO₂ Composites Induced by Calcination: Adsorption Enhancement vs Charge Transfer Enhancement

et al. 2023

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“…This finding could be interpreted as evidence of extensive destruction of cysteine in these archeological keratin fibers. Disulfide bonds are the main chemical cross-linkage maintaining the keratin fiber's secondary structure [30,31]. Cleavage of a large proportion of the disulfide bonds between its molecular chains causes a high degree of keratin degradation.…”

Section: Element Content (%)mentioning

confidence: 99%

Pre-Columbian Archeological Textiles: A Source of Pseudomonas aeruginosa with Virulence Attributes

et al. 2019

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Pseudomonas aeruginosa is an opportunistic pathogen associated with a broad spectrum of infections in humans. However, the pathogenicity of environmental P. aeruginosa strains, especially isolates from museums and conservation laboratories, is not widely recognized. In this study, the virulence attributes of P. aeruginosa isolated from pre-Columbian textiles were compared to those of a clinical strain. Both genetically identified environmental strains (KP842564 and KP842565) exhibited a high ability to form biofilms on abiotic surfaces and high hemolytic activity. In addition, strain KP842564 was a moderate pyocyanin producer and showed proteolytic properties toward bovine serum albumin, fibrinogen, mucin, and casein. In contrast to the clinical isolate, the environmental strains were susceptible to all the tested antimicrobial agents. The strains also showed high bioadhesion and colonization capacity on archeological textile samples, in which wool fibers were the only source of nutrients, as confirmed by scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX) analysis. This study highlights the need to identify microorganisms which inhabit historic objects, in order to avoid exposure to occupational hazards. Although the strain KP842565 exhibited only some of the examined virulence-related features, given that the production of pyocyanin and hemolysins as well as the formation of biofilm are important virulence factors of P. aeruginosa, the results indicate that these strains may present a potential health risk for humans.

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“…In general, the performance of the organic reducing agents is superior to that of the inorganic ones. Particularly, 9.62 wt % of cysteine is detected from the keratin dissolved in the SDS/ DTT system, which is very close to the cystine content in natural wool (10.1 wt %), 47 indicating that almost all cystine in the wool waste has been converted to cysteine. The finding agrees with the results of small molecule simulation reaction (Table S1).…”

Section: ■ Results and Discussionmentioning

confidence: 55%

Continuous High-Content Keratin Fibers with Balanced Properties Derived from Wool Waste

Cao

Rong

Zhang

2020

ACS Sustainable Chem. Eng.

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The full utilization of discarded wool for the preparation of continuous recycled keratin fibers has been a challenging subject. The key issue lies in how to utilize wool keratin as much as possible without damaging the main chain structure of the protein molecules. Based on small molecule simulation reactions, the authors find out that disulfide bonds, the only cross-linking bonds in keratin, can be effectively broken by starch-derived dithiothreitol, and the resultant keratin can be well separated by the cosmetic ingredient sodium dodecyl sulfate, which forms micelles that stabilize the keratin solution. Accordingly, the traditional strong hydrogen-bond breakers like urea and LiBr can no longer be used, which helps to protect the integrity of keratin. The resultant fully dissolved, highly concentrated keratin solution (keratin content = 18 wt %) is directly applied for wet spinning. To toughen and strengthen the envisaged keratin fibers, a few hydroxypropyl cellulose and glutaraldehyde and 4,4′methylenebis(phenyl isocyanate) are incorporated. Eventually, the regenerated continuous fibers with keratin content as high as 90 wt % offer a combination of properties similar to natural wool.

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Study on the effect of organic phosphonic compounds on disulfide bonds in wool

Cited by 23 publications

References 33 publications

Selective Photocatalytic Activities of Amino Acids/Peptide-Ti₃C₂T_x-TiO₂ Composites Induced by Calcination: Adsorption Enhancement vs Charge Transfer Enhancement

Selective Photocatalytic Activities of Amino Acids/Peptide-Ti₃C₂T_x-TiO₂ Composites Induced by Calcination: Adsorption Enhancement vs Charge Transfer Enhancement

Pre-Columbian Archeological Textiles: A Source of Pseudomonas aeruginosa with Virulence Attributes

Continuous High-Content Keratin Fibers with Balanced Properties Derived from Wool Waste

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Study on the effect of organic phosphonic compounds on disulfide bonds in wool

Cited by 23 publications

References 33 publications

Selective Photocatalytic Activities of Amino Acids/Peptide-Ti3C2Tx-TiO2 Composites Induced by Calcination: Adsorption Enhancement vs Charge Transfer Enhancement

Selective Photocatalytic Activities of Amino Acids/Peptide-Ti3C2Tx-TiO2 Composites Induced by Calcination: Adsorption Enhancement vs Charge Transfer Enhancement

Pre-Columbian Archeological Textiles: A Source of Pseudomonas aeruginosa with Virulence Attributes

Continuous High-Content Keratin Fibers with Balanced Properties Derived from Wool Waste

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Product

Resources

About

Selective Photocatalytic Activities of Amino Acids/Peptide-Ti₃C₂T_x-TiO₂ Composites Induced by Calcination: Adsorption Enhancement vs Charge Transfer Enhancement

Selective Photocatalytic Activities of Amino Acids/Peptide-Ti₃C₂T_x-TiO₂ Composites Induced by Calcination: Adsorption Enhancement vs Charge Transfer Enhancement