Preparation and application of poly(N,N-dimethylacrylamide-co-acrylamide) and poly(N-isopropylacrylamide-co-acrylamide)/κ-Carrageenan hydrogels for immobilization of lipase

Tümtürk, Hayrettin; Karaca, Nurcan; Demirel, Gökhan; Şahin, Ferat

doi:10.1016/j.ijbiomac.2006.07.004

Cited by 77 publications

(28 citation statements)

References 18 publications

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“…The copolymerization of j-carrageenan with acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid led to the development of biodegradable hydrogels with potential use for novel drug delivery systems (Pourjavadi, Barzegar, & Zeidabadi, 2007). These carrageenan hydrogels are very promising for industrial immobilization of enzymes since the immobilization procedures result in increases of the storage and thermal stability of the enzymes necessary for use in continuous systems (Tumturk, Karaca, Demirel, & Sahin, 2007).…”

Section: Chemical Modificationsmentioning

confidence: 99%

Carrageenans: Biological properties, chemical modifications and structural analysis – A review

Campo

Kawano

Silva

et al. 2009

Carbohydrate Polymers

1,101

558

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Section: Chemical Modificationsmentioning

confidence: 99%

Carrageenans: Biological properties, chemical modifications and structural analysis – A review

Campo

Kawano

Silva

et al. 2009

Carbohydrate Polymers

1,101

558

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“…The viscosity of the carrageenan solution decreases reversibly with an increase in temperature (Anderson, 1968). Thus, carrageenan hydrogels are very promising, nontoxic natural polymers for the industrial immobilization of enzymes (Tumturk et al, 2007). Much research is anticipated in this field in order to design a robust immobilized lipase for biodiesel production.…”

Section: Enzymatic Transesterification Of J Curcas Oilmentioning

confidence: 99%

Biodiesel production fromJatropha curcas: a critical review

Abdulla

Chan

Ravindra

2010

Critical Reviews in Biotechnology

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The fuel crisis and environmental concerns, mainly due to global warming, have led researchers to consider the importance of biofuels such as biodiesel. Vegetable oils, which are too viscous to be used directly in engines, are converted into their corresponding methyl or ethyl esters by a process called transesterification. With the recent debates on "food versus fuel," non-edible oils, such as Jatropha curcas, are emerging as one of the main contenders for biodiesel production. Much research is still needed to explore and realize the full potential of a green fuel from J. curcas. Upcoming projects and plantations of Jatropha in countries such as India, Malaysia, and Indonesia suggest a promising future for this plant as a potential biodiesel feedstock. Many of the drawbacks associated with chemical catalysts can be overcome by using lipases for enzymatic transesterification. The high cost of lipases can be overcome, to a certain extent, by immobilization techniques. This article reviews the importance of the J. curcas plant and describes existing research conducted on Jatropha biodiesel production. The article highlights areas where further research is required and relevance of designing an immobilized lipase for biodiesel production is discussed.

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“…[1][2][3][4][5][6][7] Environmentally sensitive gels have great potential in several technologically important areas such as drug delivery, articial muscles, separation techniques, sensor construction, swing absorbers, and molecular recognition. [8][9][10][11][12][13][14][15][16][17][18][19][20] Additionally, their attachment to the surface of an object widens their usefulness, for instance in the construction of switchable sensors/biosensors, switchable electrochemical systems, signal-responsive interfaces, and surface patterning. [21][22][23][24][25][26][27][28] The environmentally sensitive gels that are most oen investigated are thermo sensitive gels based on N-isopropylacrylamide.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of ferrocenemethanol grafted to a hydrogel network through cysteine for triggering volume phase transition

2013

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New gels based on N-isopropylacrylamide and cysteine were prepared by free radical polymerization in aqueous solutions. To attach the amino acid to the polymer chain, its a-amino group was modified with acryloyl chloride and N,N 0 -bisacryloylcystine was obtained. Next, the disulfide bridges were reduced to thiol groups and the attachment of ferrocenemethanol to the chains was performed. The influence of the amount of electroactive groups and their degree of oxidation on the temperature of volume phase transition was investigated. The gel formed from the polymerization solution containing 2% N,N 0 -bisacryloylcystine could undergo the volume phase transition triggered by changing the ferrocene state of oxidation. The temperature window of the gel sensitivity to the oxidation state of its ferrocene component was 35-40 C. During the transition the volume of the gel could be changed even by more than an order of magnitude. Thin layers of the electroactive and thermoresponsive gel could be anchored on the surface of a glassy carbon electrode. This was achieved by electroformation of radicals at the electrode surface. The influence of the volume phase transition triggered by a temperature change on redox processes of ferrocene moieties bound to the network was examined voltammetrically.

show abstract

Preparation and application of poly(N,N-dimethylacrylamide-co-acrylamide) and poly(N-isopropylacrylamide-co-acrylamide)/κ-Carrageenan hydrogels for immobilization of lipase

Cited by 77 publications

References 18 publications

Carrageenans: Biological properties, chemical modifications and structural analysis – A review

Carrageenans: Biological properties, chemical modifications and structural analysis – A review

Biodiesel production fromJatropha curcas: a critical review

Oxidation of ferrocenemethanol grafted to a hydrogel network through cysteine for triggering volume phase transition

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