Modification of polyacrylonitrile fabric for antibacterial application by tetracycline immobilization

Akkaya, Alper; Ozseker, Emine Erdogan

doi:10.1016/j.polymertesting.2019.105959

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…In addition, the degree of ionization of the functional groups present in the laccase active site can also change with the change in the pH of the microenvironment. As a direct result, the affinity between the enzyme and the substrate may increase or decrease as the active site's ionization degree may change and new ionic interactions may occur 79 . The secondary interactions developed between the support matrix and the enzyme can be favorable regarding the amplitude in the pH range of the immobilized enzyme 80 …”

Section: Resultsmentioning

confidence: 99%

“…As a direct result, the affinity between the enzyme and the substrate may increase or decrease as the active site's ionization degree may change and new ionic interactions may occur. 79 The secondary interactions developed between the support matrix and the enzyme can be favorable regarding the amplitude in the pH range of the immobilized enzyme. 80 At pH 3, the improvement in enzyme performance after immobilization in PAN is clear, while for free laccase, the most relevant results occurred at pH 5.…”

Section: Stability Test Of Immobilized Laccase At Different Phsmentioning

confidence: 99%

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Functionalized polyacrylonitrile particles as a promising support for the immobilization of laccase fromTrametes versicolor

Vieira

Henriques

Gurgel

et al. 2023

J of Applied Polymer Sci

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This work evaluates the potential of polyacrylonitrile particles (PAN) as support for laccase from Trametes versicolor immobilization. The slurry polymerization method forms mesoporous particles with low surface area and low maximum pore volume in desorption. The particles were chemically modified by consecutive alkaline and acid hydrolysis, followed by amination and activation with glutaraldehyde to enzyme immobilization. The laccase immobilization yield was 99.48% and 14.29% using the functionalized and non-functionalized particles, respectively. The enzyme activity was measured by the oxidation of 2,2 0 -azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) at different pHs and temperatures. The PAN/laccase derivative was hyperactivated at pH 3, up to 3 times higher than the free enzyme, and performed better at 50 C after 6 h of incubation, with relative activity up to 33% higher than the free enzyme. However, both enzymes denatured when the conditions reached pH 8 and 70 C. The PAN/laccase retained 89% of the initial activity after 30 days of storage at 5 C. It was possible to reuse the enzymatic derivative for 5 cycles, with up to 50% residual activity, under 50 C and pH 3. These results show the potential of this new support for laccase immobilization and further applications of industrial interest.

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Section: Resultsmentioning

confidence: 99%

Section: Stability Test Of Immobilized Laccase At Different Phsmentioning

confidence: 99%

Functionalized polyacrylonitrile particles as a promising support for the immobilization of laccase fromTrametes versicolor

Vieira

Henriques

Gurgel

et al. 2023

J of Applied Polymer Sci

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“…The majority of the isolated nitrilases were composed of one polypeptide with a molecular weight of 3045 kDa, which under certain conditions would assemble to create the active holoenzyme [118]. The enzyme appears to exist most frequently as a big aggregate with 626 subunits, although increased levels of solvents which are organic in nature, temperature, pH, salt, or even the enzyme itself can cause subunit interaction and subsequently stimulation, whereas the majority of enzymes exhibit substrate-dependent activation [119]. The primary enzyme in the enzymatic process for converting nitriles to amides, which are then transformed by amidases to the appropriate acid, is nitrile hydratase (NHase).…”

Section: Nitrilases and Nitrile Hydratasesmentioning

confidence: 99%

Ecological Applications of Enzymes in Plants Based Textile Dyeing

Haddar,

Adeel,

Salman

et al. 2023

Dyes and Pigments - Insights and Applications

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Biotechnology has a foremost role in the textile industry by enhancing ecofriendly, cost-effective, and energy-efficient manufacturing processes. The use of enzymatic biotechnology is one of the sustainable newly developed state-of-the-art processes for textile processing. To reduce the use of toxic and hazardous chemicals, enzymes have been proposed as one of the finest promising alternatives. Many enzymes have been used widely in textile processes such as lipase, laccase, pectinase, cellulase, catalase, amylase, and protease. The enzymatic use in the textile industry is very promising because they produce top-class goods, and give way to the reduction of water, time, and energy. The increasing demand for natural dyes especially with the incorporation of enzymes makes process more sustainable and eco-friendlier to suppress the toxicity of synthetic dyes. In the first part of the chapter, particular attention has been given to the source and extraction of natural dyes. In the second part of the chapter, different enzymes and their possible roles in the textile industry have been discussed. It is expected that this chapter will provide an innovative direction to the academic researchers, the community of textile and traders as well as artisans who are working in the area of biotechnological applications for the betterment of textile processing.

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“…Both enzymes are produced under inducible or constitutive conditions, depending on the nutrients utilized during microbial cultivation (Yamada and Kobayashi 1996 ; Gong et al 2012 ), being an advantage for future studies on PAN waste biodegradation. The direct conversion of PAN into PAA by the action of nitrilases was demonstrated by incubating the polymer with commercial enzymes and measuring ammonia release (Matamá et al 2007 ) and analyzing the modifications in nitrilase-treated PAN by ATR-FTIR spectra (Akkaya and Ozseker 2019 ). The nitrile hydratase/amidase system produced by R .…”

Section: Enzymatic Activities and Pathways Involved In Microbial Ap Dmentioning

confidence: 99%

Current status on the biodegradability of acrylic polymers: microorganisms, enzymes and metabolic pathways involved

Gaytán

Burelo

Loza-Tavera

2021

Appl Microbiol Biotechnol

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Acrylic polymers (AP) are a diverse group of materials with broad applications, frequent use, and increasing demand. Some of the most used AP are polyacrylamide, polyacrylic acid, polymethyl methacrylates, and polyacrylonitrile. Although no information for the production of all AP types is published, data for the most used AP is around 9 MT/year, which gives an idea of the amount of waste that can be generated after products' lifecycles. After its lifecycle ends, the fate of an AP product will depend on its chemical structure, the environmental setting where it was used, and the regulations for plastic waste management existing in the different countries. Even though recycling is the best fate for plastic polymer wastes, few AP can be recycled, and most of them end up in landfills. Because of the pollution crisis the planet is immersed, setting regulations and developing technological strategies for plastic waste management are urgent. In this regard, biotechnological approaches, where microbial activity is involved, could be attractive eco-friendly strategies. This mini-review describes the broad AP diversity, their properties and uses, and the factors affecting their biodegradability, underlining the importance of standardizing biodegradation quantification techniques. We also describe the enzymes and metabolic pathways that microorganisms display to attack AP chemical structure and predict some biochemical reactions that could account for quaternary carbon-containing AP biodegradation. Finally, we analyze strategies to increase AP biodegradability and stress the need for more studies on AP biodegradation and developing stricter legislation for AP use and waste control. Key points• Acrylic polymers (AP) are a diverse and extensively used group of compounds.• The environmental fates and health effects of AP waste are not completely known.• Microorganisms and enzymes involved in AP degradation have been identified.• More biodegradation studies are needed to develop AP biotechnological treatments.

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Modification of polyacrylonitrile fabric for antibacterial application by tetracycline immobilization

Cited by 9 publications

References 25 publications

Functionalized polyacrylonitrile particles as a promising support for the immobilization of laccase fromTrametes versicolor

Functionalized polyacrylonitrile particles as a promising support for the immobilization of laccase fromTrametes versicolor

Ecological Applications of Enzymes in Plants Based Textile Dyeing

Current status on the biodegradability of acrylic polymers: microorganisms, enzymes and metabolic pathways involved

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