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Immobilization of Alpha Acetolactate Decarboxylase in Hybrid Gelatin/Alginate Support for Application to Reduce Diacetyl Off-Flavor in Beer. Catalysts 2023. [DOI: 10.3390/catal13030601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023] Open
Abstract
Beer production is the largest among alcoholic beverages. Its production process is complex and demands several steps. Lager beers commonly present an off-flavor of butter that is due to the presence of diacetyl, and to avoid such a problem, a long period of maturation (3–5 weeks) is required. Another way is the application of (α-acetolactate decarboxylase) ALDC to accelerate the process. The objectives of the present work were to develop a low-cost support using gelatin, a residue from capsules from the nutraceutical industry, to immobilize the ALDC enzyme. For this, the yield, efficiency and activity recovered, and the stability of free and immobilized enzymes at different temperatures and pH were evaluated. To evaluate the capacity of immobilized enzymes when applied directly to beer and their operational stability, three concentrations of glutaraldehyde (1%, 2.5% and 5%) were tested in distilled water as a cross-linking agent. The best results obtained were 95.6%, 27.0% and 23.6%, respectively, for yield, efficiency and activity recovery. Immobilization provided a high activity over a wide pH range. The immobilized enzyme showed greater stability at temperatures of 50 and 60 °C. The immobilized derivative showed adequate reuse capacity, and its dehydrated form had excellent activity after long periods of storage.
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2
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Carbohydrate microcapsules tailored and grafted for covalent immobilization of glucose isomerase for pharmaceutical and food industries. Biotechnol Lett 2023; 45:175-189. [PMID: 36482052 DOI: 10.1007/s10529-022-03323-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 10/31/2022] [Accepted: 11/15/2022] [Indexed: 12/14/2022]
Abstract
Carrageenan is one of the most common carbohydrates utilised in the entrapment industry to immobilise cells and enzymes. However, it lacks functionality. Carrageenan has been grafted to produce fructose by covalently immobilising glucose isomerase (GI). Fructose is one of the most widely used sweeteners in beverages, food production, and the pharmaceutical business. Up to 91.1 U g-1 gel beads are immobilised by the grafted beads. Immobilized GI has a Vmax of 13.8 times that of the free enzyme. pH of immobilized GI was improved from 6.5-7 to 6-7.5 that means more stability in wide pH range. Also, optimum temperature was improved and become 65-75 °C while it was at 70 °C for free enzyme. The immovability and tolerance of the gel beads immobilised with GI over 15 consecutive cycles were demonstrated in a reusability test, with 88 percent of the enzyme's original activity retained, compared to 60 percent by other authors. These findings are encouraging for high-fructose corn syrup producers.
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Optimization of Alpha-Amylase Production by a Local Bacillus paramycoides Isolate and Immobilization on Chitosan-Loaded Barium Ferrite Nanoparticles. FERMENTATION 2022. [DOI: 10.3390/fermentation8050241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We set out to isolate alpha-amylase producers from soil samples, optimize the production, and immobilize the enzyme on chitosan-loaded barium ferrite nanoparticles (CLBFNPs). Alpha-amylase producers were isolated on starch agar plates and confirmed by dinitrosalicylic acid assay. The potent isolate was identified by phenotypic methods, 16S-rRNA sequencing, and phylogenetic mapping. Sequential optimization of α-amylase production involved the use of Plackett–Burman (P–BD) and central composite designs (CCD), in addition to exposing the culture to different doses of gamma irradiation. Alpha-amylase was immobilized on CLBFNPs, and the nanocomposite was characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy, with energy-dispersive analysis of X-ray analysis. Forty-five α-amylase producers were isolated from 100 soil samples. The highest activity (177.12 ± 6.12 U/mg) was detected in the MS009 isolate, which was identified as Bacillus paramycoides. The activity increased to 222.3 ± 5.07 U/mg when using the optimal culture conditions identified by P–BD and CCD, and to 319.45 ± 4.91 U/mg after exposing the culture to 6 kGy. Immobilization of α-amylase on CLBFNPs resulted in higher activity (246.85 ± 6.76 U/mg) compared to free α-amylase (222.254 ± 4.89 U/mg), in addition to retaining activity for up to five cycles of usage. Gamma irradiation improved α-amylase production, while immobilization on CLBFNPs enhanced activity, facilitated enzyme recovery, and enabled its repetitive use.
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Deproteinization of Shrimp Shell Waste by Kurthia gibsonii Mb126 immobilized chitinase. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.2.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This work was aimed at immobilization, characterization, and utilization of chitinase from Kurthia gibsonii Mb126. Immobilization of Kurthia gibsonii Mb126 chitinase on glutaraldehyde treated chitosan was carried out with immobilization yield of 106%. The optimal factors of the immobilization technique such as concentration of glutaraldehyde, chitinase concentration, and immobilization time were evaluated. After optimizing process parameters of immobilization (Glutaraldehyde concentration 4%, chitinase conc. 60mg, immobilization time 30min.), the specific activity of immobilized chitinase improved to 4.3-fold compared to the free form of chitinase. Temperature and pH optima of the immobilized chitinase and free enzyme were same i.e., 7.5 and 40°C respectively. The relative activity of immobilized chitinase remained 90% at 40°C, at 50°C, and at 60°C for 120 min. In the pH range from 5.5 to 8, the immobilized chitinase retained 100% activity. The results confirmed that the pH stability and thermal stability of chitinase increased by immobilizing chitinase on chitosan. The immobilized enzyme system maintained 90% of its efficiency even after 16 successive reaction cycles. The immobilized chitinase maintained 78% of its activity even after 20 months. Fermentation of prawn shell waste with immobilized chitinase indicated a high level of deproteinization. Deproteinization experiments were carried out with 5mL (0.4 mg/mL ) of immobilized and free chitinase on 300 mg/mL of prawn shell waste for 20 days without any additional supplements at 40°C and 6.5 pH. Protein content was reduced from 38.4 to 0.8% with immobilized chitinase. Results suggests the possibility of using immobilized enzymes to remove the prawn shell waste from the environment. To the best of our knowledge there was no such study about the deproteinization of prawn shell waste using immobilized chitinase till the date.
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de Sousa Fonseca T, de Oliveira UMF, de Oliveira MDCF, de Lemos TLG, da Silva MR, Rios NS, Gonçalves LRB, de Mattos MC. Immobilization of Amano lipase AK from Pseudomonas fluorescens on different types of chitosan-containing supports: use in the kinetic resolution of rac-indanol. Bioprocess Biosyst Eng 2021; 44:785-792. [PMID: 33389170 DOI: 10.1007/s00449-020-02487-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 11/19/2020] [Indexed: 11/30/2022]
Abstract
Amano lipase AK from P. fluorescens was immobilized on different types of chitosan-containing supports. Chitosan lower molecular weight (2.5%), chitosan lower molecular weight/sodium alginate (2.5%/2.5%) and chitosan lower molecular weight/carrageenan (2.5%/2.5%) allowed the highest values of immobilization yields (IY) of 81, 81 and 83%, respectively. Best activity results were achieved using chitosan average molecular weight (5%) and chitosan lower molecular weight/sodium alginate (2.5%/2.5%) as support, with values of 1.40 and 1.30 UpNPB/ggel and with recovery activities of 45.75 and 35.6%, respectively. These derivatives were evaluated in the kinetic resolution of rac-indanol to obtain a key intermediate in the synthesis of a drug used in the treatment of Parkinson's disease. The most efficient derivatives in the kinetic resolution were lipase immobilized on chitosan average molecular weight (5.0%) and chitosan low molecular weight/sodium alginate, the latter leading to obtaining both (S)-indanol and (R)-indanyl acetate with > 99% ee and 50% conversion.
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Affiliation(s)
- Thiago de Sousa Fonseca
- Department of Organic and Inorganic Chemistry, Laboratory of Biotechnology and Organic Synthesis (LABS), Federal University of Ceará, Campus do Pici, Fortaleza, Ceará, 60455-970, Brazil.,Federal Institute of Education, Science and Technology of Ceará, Campus de Crateús, Avenida Geraldo Barbosa Marques, 567, Crateús, CE, 63708-260, Brazil
| | - Ulisses Marcondes Freire de Oliveira
- Department of Organic and Inorganic Chemistry, Laboratory of Biotechnology and Organic Synthesis (LABS), Federal University of Ceará, Campus do Pici, Fortaleza, Ceará, 60455-970, Brazil
| | - Maria da Conceição Ferreira de Oliveira
- Department of Organic and Inorganic Chemistry, Laboratory of Biotechnology and Organic Synthesis (LABS), Federal University of Ceará, Campus do Pici, Fortaleza, Ceará, 60455-970, Brazil
| | - Telma Leda Gomes de Lemos
- Department of Organic and Inorganic Chemistry, Laboratory of Biotechnology and Organic Synthesis (LABS), Federal University of Ceará, Campus do Pici, Fortaleza, Ceará, 60455-970, Brazil
| | | | - Nathalia Saraiva Rios
- Department of Chemical Engineering, Federal University of Ceará, Campus do Pici, Fortaleza, Ceará, 60455-760, Brazil
| | | | - Marcos Carlos de Mattos
- Department of Organic and Inorganic Chemistry, Laboratory of Biotechnology and Organic Synthesis (LABS), Federal University of Ceará, Campus do Pici, Fortaleza, Ceará, 60455-970, Brazil.
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6
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Elnashar M, Vaccarezza M, Al-Salami H. Cutting-edge biotechnological advancement in islet delivery using pancreatic and cellular approaches. Future Sci OA 2020; 7:FSO660. [PMID: 33552541 PMCID: PMC7849926 DOI: 10.2144/fsoa-2020-0105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
There are approximately 1 billion prediabetic people worldwide, and the global cost for diabetes mellitus (DM) is estimated to be $825 billion. In regard to Type 1 DM, transplanting a whole pancreas or its islets has gained the attention of researchers in the last few decades. Recent studies showed that islet transplantation (ILT) containing insulin-producing β cells is the most notable advancement cure for Type 1 DM. However, this procedure has been hindered by shortage and lack of sufficient islet donors and the need for long-term immunosuppression of any potential graft rejection. The strategy of encapsulation may avoid the rejection of stem-cell-derived allogeneic islets or xenogeneic islets. This review article describes various biotechnology features in encapsulation-of-islet-cell therapy for humans, including the use of bile acids.
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Affiliation(s)
- Magdy Elnashar
- Biotechnology & Drug Development Research Laboratory, School of Pharmacy & Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia.,Centre of Excellence, Department of Polymers, National Research Centre, Cairo, Egypt
| | - Mauro Vaccarezza
- School of Pharmacy & Biomedical Science, Faculty of Health Sciences, Curtin University, Bentley, Perth, WA 6102, Australia
| | - Hani Al-Salami
- Biotechnology & Drug Development Research Laboratory, School of Pharmacy & Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia
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7
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Awad GE, Ghanem AF, Abdel Wahab WA, Wahba MI. Functionalized κ-carrageenan/hyperbranched poly(amidoamine)for protease immobilization: Thermodynamics and stability studies. Int J Biol Macromol 2020; 148:1140-1155. [DOI: 10.1016/j.ijbiomac.2020.01.122] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 01/12/2020] [Accepted: 01/12/2020] [Indexed: 12/23/2022]
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8
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Immobilization of xylanase on modified grafted alginate polyethyleneimine bead based on impact of sodium cation effect. Int J Biol Macromol 2019; 140:1284-1295. [DOI: 10.1016/j.ijbiomac.2019.08.211] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 08/23/2019] [Accepted: 08/24/2019] [Indexed: 12/18/2022]
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9
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Ismail SA, Hassan ME, Hashem AM. Single step hydrolysis of chitin using thermophilic immobilized exochitinase on carrageenan-guar gum gel beads. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101281] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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10
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Mohammadi M, Khakbaz Heshmati M, Sarabandi K, Fathi M, Lim LT, Hamishehkar H. Activated alginate-montmorillonite beads as an efficient carrier for pectinase immobilization. Int J Biol Macromol 2019; 137:253-260. [DOI: 10.1016/j.ijbiomac.2019.06.236] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/27/2019] [Accepted: 06/28/2019] [Indexed: 01/03/2023]
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11
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Temkov M, Petrovski A, Gjorgieva E, Popovski E, Lazarova M, Boev I, Paunovic P, Grozdanov A, Dimitrov A, Baidak A, Krastanov A. Inulinase immobilization on polyethylene glycol/polypyrrole multiwall carbon nanotubes producing a catalyst with enhanced thermal and operational stability. Eng Life Sci 2019; 19:617-630. [PMID: 32625037 DOI: 10.1002/elsc.201900021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 06/11/2019] [Accepted: 07/01/2019] [Indexed: 11/12/2022] Open
Abstract
This paper describes the development of a simple method for mixed non-covalent and covalent bonding of partially purified inulinase on functionalized multiwall carbon nanotubes (f-MWCNTs) with polypyrrole (PPy). The pyrrole (Py) was electrochemically polymerized on MWCNTs in order to fabricate MWCNTs/PPy nanocomposite. Two multiple forms of enzyme were bound to N-H functional groups from PPy and -COO- from activated MWCNTs to yield a stable MWCNTs/PPy/PEG immobilized preparation with increased thermal stability. Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) were used to confirm functionalization of nanoparticles and immobilization of the enzyme. The immobilization yield of 85% and optimal enzyme load of 345 μg protein onto MWCNTs was obtained. The optimum reaction conditions and kinetic parameters were established using the UV-Vis analytical assay. The best functional performance for prepared heterogeneous catalyst has been observed at pH 3.6 and 10, and at the temperatures of 60 and 80ºC. The half-life (t 1/2) of the immobilized inulinase at 60 and 80ºC was found to be 231 and 99 min, respectively. The reusability of the immobilized formulation was evaluated based on a method in which the enzyme retained 50% of its initial activity, which occurred after the eighteenth operation cycle.
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Affiliation(s)
- Mishela Temkov
- Faculty of Technology and Metallurgy Ss. Cyril and Methodius University in Skopje Skopje Republic of Macedonia.,Faculty of Technology University of Food Technologies Plovdiv Bulgaria
| | - Aleksandar Petrovski
- Faculty of Technology and Metallurgy Ss. Cyril and Methodius University in Skopje Skopje Republic of Macedonia
| | - Emilija Gjorgieva
- Institute of Chemistry Faculty of Natural Science and Mathematics Ss. Cyril and Methodius University in Skopje Skopje Republic of Macedonia
| | - Emil Popovski
- Institute of Chemistry Faculty of Natural Science and Mathematics Ss. Cyril and Methodius University in Skopje Skopje Republic of Macedonia
| | - Maja Lazarova
- Technological Technical Faculty University Goce Delcev Shtip Republic of Macedonia
| | - Ivan Boev
- Technological Technical Faculty University Goce Delcev Shtip Republic of Macedonia
| | - Perica Paunovic
- Faculty of Technology and Metallurgy Ss. Cyril and Methodius University in Skopje Skopje Republic of Macedonia
| | - Anita Grozdanov
- Faculty of Technology and Metallurgy Ss. Cyril and Methodius University in Skopje Skopje Republic of Macedonia
| | - Aleksandar Dimitrov
- Faculty of Technology and Metallurgy Ss. Cyril and Methodius University in Skopje Skopje Republic of Macedonia
| | - Aliaksandr Baidak
- Dalton Cumbrian Facility University of Manchester West Lakes United Kingdom.,School of Chemistry University of Manchester Manchester United Kingdom
| | - Albert Krastanov
- Faculty of Technology University of Food Technologies Plovdiv Bulgaria
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12
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Singh RS, Chauhan K, Pandey A, Larroche C. Biocatalytic strategies for the production of high fructose syrup from inulin. BIORESOURCE TECHNOLOGY 2018; 260:395-403. [PMID: 29636277 DOI: 10.1016/j.biortech.2018.03.127] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 03/27/2018] [Accepted: 03/29/2018] [Indexed: 06/08/2023]
Abstract
The consumption of natural and low calorie sugars has increased enormously from the past few decades. To fulfil the demands, the production of healthy sweeteners as an alternative to sucrose has recently received considerable interest. Fructose is the most health beneficial and safest sugar amongst them. It is generally recognised as safe (GRAS) and has become an important food ingredient due its sweetening and various health promising functional properties. Commercially, high fructose syrup is prepared from starch by multienzymatic process. Single-step enzymatic hydrolysis of inulin using inulinase has emerged as an alternate to the conventional approach to reduce complexity, time and cost. The present review, outlines the enzymatic strategies used for the preparation of high fructose syrup from inulin/inulin-rich plant materials in batch and continuous systems, and its conclusions.
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Affiliation(s)
- R S Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India.
| | - Kanika Chauhan
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India
| | - Ashok Pandey
- CSIR-Indian Institute of Toxicology Research, 31 Marg, 226 001 Lucknow, India
| | - Christian Larroche
- Université Clermont Auvergne, Institut Pascal, UMR, CNRS 6602, and Labex, IMobS3, 4 Avenue Blaise Pascal, TSA 60026, CS 60026, F-63178 Aubiere Cedex, France
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13
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Optimization of pectinase immobilization on grafted alginate-agar gel beads by 2 4 full factorial CCD and thermodynamic profiling for evaluating of operational covalent immobilization. Int J Biol Macromol 2018; 113:159-170. [PMID: 29458101 DOI: 10.1016/j.ijbiomac.2018.02.086] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 02/11/2018] [Accepted: 02/13/2018] [Indexed: 01/14/2023]
Abstract
Pectinase produced by a honey derived from the fungus Aspergillus awamori KX943614 was covalently immobilized onto gel beads made of alginate and agar. Polyethyleneimine, glutaraldehyde, loading time and enzyme's units were optimized by 24 full factorial central composite design (CCD). The immobilization process increased the optimal working pH for the free pectinase from 5 to a broader range of pH4.5-5.5 and the optimum operational temperature from 55°C to a higher temperature, of 60°C, which is favored to reduce the enzyme's microbial contamination. The thermodynamics studies showed a thermal stability enhancement against high temperature for the immobilized formula. Moreover, an increase in half-lives and D-values was achieved. The thermodynamic studies proved that immobilization of pectinase made a remarkable increase in enthalpy and free energy because of enzyme stability enhancement. The reusability test revealed that 60% of pectinase's original activity was retained after 8 successive cycles. This gel formula may be convenient for immobilization of other industrial enzymes.
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14
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Inulin Hydrolysis by Immobilized Inulinase on Functionalized Magnetic Nanoparticles Using Soy Protein Isolate and Bovine Serum Albumin. J CHIN CHEM SOC-TAIP 2018. [DOI: 10.1002/jccs.201700364] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Neeraj G, Ravi S, Somdutt R, Ravi SK, Kumar VV. Immobilized inulinase: a new horizon of paramount importance driving the production of sweetener and prebiotics. Crit Rev Biotechnol 2017; 38:409-422. [DOI: 10.1080/07388551.2017.1359146] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Gerard Neeraj
- Bioprocess Engineering Laboratory, Department of Biotechnology, School of Bioengineering, SRM University, Chennai, India
| | - Shobana Ravi
- Bioprocess Engineering Laboratory, Department of Biotechnology, School of Bioengineering, SRM University, Chennai, India
| | - Ravindran Somdutt
- Bioprocess Engineering Laboratory, Department of Biotechnology, School of Bioengineering, SRM University, Chennai, India
| | - ShriAishvarya Kaliyur Ravi
- Bioprocess Engineering Laboratory, Department of Biotechnology, School of Bioengineering, SRM University, Chennai, India
| | - Vaidyanathan Vinoth Kumar
- Bioprocess Engineering Laboratory, Department of Biotechnology, School of Bioengineering, SRM University, Chennai, India
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16
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Awad GEA, Wehaidy HR, Abd El Aty AA, Hassan ME. A novel alginate–CMC gel beads for efficient covalent inulinase immobilization. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4024-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Reus MA, Krintiras GA, Stefanidis GD, ter Horst JH, van der Heijden AEDM. Immobilization of gluten in spherical matrices of food-grade hydrogels. J FOOD PROCESS ENG 2017. [DOI: 10.1111/jfpe.12534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Marloes A. Reus
- Process & Energy Department, Intensified Reaction & Separation Systems; Delft University of Technology; Leeghwaterstraat 39, 2628 CB, Delft The Netherlands
| | - Georgios A. Krintiras
- Process & Energy Department, Intensified Reaction & Separation Systems; Delft University of Technology; Leeghwaterstraat 39, 2628 CB, Delft The Netherlands
| | - Georgios. D. Stefanidis
- Process & Energy Department, Intensified Reaction & Separation Systems; Delft University of Technology; Leeghwaterstraat 39, 2628 CB, Delft The Netherlands
- Chemical Engineering Department; Katholieke Universiteit Leuven, Willem de Croylaan 46; Leuven 3001 Belgium
| | - Joop H. ter Horst
- EPSRC Centre for Innovative Manufacturing in Continuous Manufacturing and Crystallisation (CMAC), Technology and Innovation Centre; University of Strathclyde, Strathclyde Institute of Pharmacy and Biomedical Sciences, 99 George Street; Glasgow G1 1RD U.K
| | - Antoine E. D. M. van der Heijden
- Process & Energy Department, Intensified Reaction & Separation Systems; Delft University of Technology; Leeghwaterstraat 39, 2628 CB, Delft The Netherlands
- TNO Technical Sciences; Rijswijk P.O. Box 45, 2280 AA The Netherlands
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18
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Maltase entrapment approach as an efficient alternative to increase the stability and recycling efficiency of free enzyme within agarose matrix. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.04.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Esawy MA, Awad GEA, Wahab WAA, Elnashar MMM, El-Diwany A, Easa SMH, El-beih FM. Immobilization of halophilic Aspergillus awamori EM66 exochitinase on grafted k-carrageenan-alginate beads. 3 Biotech 2016; 6:29. [PMID: 28330097 PMCID: PMC4711283 DOI: 10.1007/s13205-015-0333-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 06/23/2015] [Indexed: 11/29/2022] Open
Abstract
A novel extreme halophilic exochitinase enzyme was produced by honey isolate Aspergillus awamori EM66. The enzyme was immobilized successfully on k-carrageenan-alginate gel carrier (CA) with 93 % immobilization yield. The immobilization process significantly improved the enzyme specific activity 2.6-fold compared to the free form. The significant factors influencing the immobilization process such as enzyme protein concentration and loading time were studied. Distinguishable characteristics of optimum pH and temperature, stability at different temperatures and NaCl tolerance for free and immobilized enzyme were studied. The immobilization process improved optimum temperature from 35 to 45 °C. The immobilized enzyme retained 76.70 % of its activity after 2 h at 75 °C compared to complete loss of activity for the free enzyme. The reusability test proved the durability of the CA gel beads for 28 cycles without losing its activity.
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20
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Hashem AM, Gamal AA, Hassan ME, Hassanein NM, Esawy MA. Covalent immobilization of Enterococcus faecalis Esawy dextransucrase and dextran synthesis. Int J Biol Macromol 2015; 82:905-12. [PMID: 26434519 DOI: 10.1016/j.ijbiomac.2015.09.076] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 09/30/2015] [Indexed: 10/23/2022]
Abstract
Enterococcus faecalis Esawy dextransucrase was immobilized in Fe(3+)-cross-linked alginate/carboxymethyl cellulose (AC) beads. The gel beads were modified with polyethylenimine (PEI) followed by glutaraldehyde (GA) to form Fe(3+) (ACPG) beads. Fe(3+) (ACPG) was characterized using FTIR and DSC techniques. GA activated beads showed new two peaks. The first was at 1,717 cm(-1) which refers to (CO) group of a free aldehyde end of glutaraldehyde, and another peak was at 1,660 cm(-1) referring to (CN) group. The immobilization process improved the optimum temperature from 35 to 45°C. The immobilized enzyme showed its optimum activity in wide pH range (4.5-5.4) compared to pH 5.4 in case of free form. Also, the immobilization process improved the thermal and pH enzyme stability to great extent. Reusability test proved that the enzyme activity retained 60% after 15 batch reactions. Immobilized enzyme was applied successfully in the synthesis of oligosaccharides and different molecular weights of dextran.
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Affiliation(s)
- Amal M Hashem
- Department of Chemistry of Microbial and Natural Products, National Research Centre (NRC), Dokki, Cairo, Egypt
| | - Amira A Gamal
- Department of Chemistry of Microbial and Natural Products, National Research Centre (NRC), Dokki, Cairo, Egypt
| | - Mohamed E Hassan
- Center of Excellence, Encapsulation & Nanobiotechnology Group, National Research Center, Egypt
| | - Naziha M Hassanein
- Department of Microbiology, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Mona A Esawy
- Department of Chemistry of Microbial and Natural Products, National Research Centre (NRC), Dokki, Cairo, Egypt.
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I. Wahba M, E. Hassan M. Novel grafted agar disks for the covalent immobilization of β-D-galactosidase. Biopolymers 2015; 103:675-84. [DOI: 10.1002/bip.22693] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 05/31/2015] [Accepted: 06/01/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Marwa I. Wahba
- Department of Chemistry of Natural and Microbial Products; National Research Center; El-Behooth St. Dokki Giza Egypt
- Centre of Scientific Excellence-Group of Encapsulation and Nanobiotechnology; Cairo Egypt
| | - Mohamed E. Hassan
- Department of Chemistry of Natural and Microbial Products; National Research Center; El-Behooth St. Dokki Giza Egypt
- Centre of Scientific Excellence-Group of Encapsulation and Nanobiotechnology; Cairo Egypt
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22
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Falahati-Pour S, Lotfi A, Ahmadian G, Baghizadeh A. Covalent immobilization of recombinant organophosphorus hydrolase on spores of Bacillus subtilis. J Appl Microbiol 2015; 118:976-88. [DOI: 10.1111/jam.12744] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 12/10/2014] [Accepted: 12/22/2014] [Indexed: 11/29/2022]
Affiliation(s)
- S.K. Falahati-Pour
- Department of Industrial and Environmental Biotechnology; National Institute of Genetic Engineering and Biotechnology (NIGEB); Tehran Iran
| | - A.S. Lotfi
- Department of Clinical Biochemistry; Faculty of Medical Sciences; Tarbiat Modares University; Tehran Iran
| | - G. Ahmadian
- Department of Industrial and Environmental Biotechnology; National Institute of Genetic Engineering and Biotechnology (NIGEB); Tehran Iran
| | - A. Baghizadeh
- Department of Biotechnology; Institute of Science and High Technology and Environmental Sciences; Graduate University of Advanced Technology; Kerman Iran
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23
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24
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Garlet TB, Weber CT, Klaic R, Foletto EL, Jahn SL, Mazutti MA, Kuhn RC. Carbon nanotubes as supports for inulinase immobilization. Molecules 2014; 19:14615-24. [PMID: 25225722 PMCID: PMC6270940 DOI: 10.3390/molecules190914615] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 08/16/2014] [Accepted: 08/22/2014] [Indexed: 11/28/2022] Open
Abstract
The commercial inulinase obtained from Aspergillus niger was non-covalently immobilized on multiwalled carbon nanotubes (MWNT-COOH). The immobilization conditions for the carbon nanotubes were defined by the central composite rotational design (CCRD). The effects of enzyme concentration (0.8%–1.7% v/v) and adsorbent:adsorbate ratio (1:460–1:175) on the enzyme immobilization were studied. The adsorbent:adsorbate ratio variable has positive effect and the enzyme concentration has a negative effect on the inulinase immobilization (U/g) response at the 90% significance level. These results show that the lower the enzyme concentration and the higher the adsorbent:adsorbate ratio, better is the immobilization. According to the results, it is possible to observe that the carbon nanotubes present an effective inulinase adsorption. Fast adsorption in about six minutes and a loading capacity of 51,047 U/g support using a 1.3% (v/v) inulinase concentration and a 1:460 adsorbent:adsorbate ratio was observed. The effects of temperature on the immobilized enzyme activity were evaluated, showing better activity at 50 °C. The immobilized enzyme maintained 100% of its activity during five weeks at room temperature. The immobilization strategy with MWNT-COOH was defined by the experimental design, showing that inulinase immobilization is a promising biotechnological application of carbon nanotubes.
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Affiliation(s)
- Tais B Garlet
- Department of Chemical Engineering, Federal University of Santa Maria, 97105-900 Santa Maria, Brazil
| | - Caroline T Weber
- Department of Chemical Engineering, Federal University of Santa Maria, 97105-900 Santa Maria, Brazil
| | - Rodrigo Klaic
- Department of Chemical Engineering, Federal University of Santa Maria, 97105-900 Santa Maria, Brazil
| | - Edson L Foletto
- Department of Chemical Engineering, Federal University of Santa Maria, 97105-900 Santa Maria, Brazil
| | - Sergio L Jahn
- Department of Chemical Engineering, Federal University of Santa Maria, 97105-900 Santa Maria, Brazil
| | - Marcio A Mazutti
- Department of Chemical Engineering, Federal University of Santa Maria, 97105-900 Santa Maria, Brazil.
| | - Raquel C Kuhn
- Department of Chemical Engineering, Federal University of Santa Maria, 97105-900 Santa Maria, Brazil
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25
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Elnashar MMM, Kahil T. Biopolymeric formulations for biocatalysis and biomedical applications. BIOMED RESEARCH INTERNATIONAL 2014; 2014:418097. [PMID: 25028651 PMCID: PMC4083251 DOI: 10.1155/2014/418097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 05/14/2014] [Accepted: 05/15/2014] [Indexed: 11/18/2022]
Abstract
Three gel disks formulations prepared using chitosan (Chito) or polyethylenimine (PEI) followed by glutaraldehyde were prepared for biocatalysis and biomedical applications. The carriers have been used to immobilize lactase covalently and it was evaluated in terms of enzyme loading capacity and enzyme kinetics (km and Vmax). The Km of the Chito formulation was almost half that of the PEI formulations, which is favored in industries. On the other hand, the gel disks were evaluated in terms of their swelling kinetics and the gels' morphology using SEM. The mechanism of the three gels' swelling was also studied and it was found to be non-Fickian, where the mechanism of transport depends on both the diffusion and polymer relaxation, which are controlling the overall rate of water uptake. The Chito formulation was 2-5 folds and PEI formulations were 33-62 folds in terms of the swelling rate constant and the diffusion rate, respectively. These results were highly supported by the SEM. This study will help scientists to design the right polymer network for enzymes immobilization as well as control the surface area and the swelling power of the polymers for different applications such as drug delivery systems and tissue engineering.
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Affiliation(s)
- Magdy M. M. Elnashar
- Center of Excellence, Encapsulation & Nanobiotechnology Group, Polymers Department, National Research Center, El-Behouth Street, Cairo 12311, Egypt
- Biochemistry Department, Medical School, Taif University, Hawyia, Taif 5700, Saudi Arabia
| | - Tarek Kahil
- Microbial Chemistry Department, National Research Center, El-Behouth Street, Cairo 12311, Egypt
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26
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Novel epoxy activated hydrogels for solving lactose intolerance. BIOMED RESEARCH INTERNATIONAL 2014; 2014:817985. [PMID: 25013804 PMCID: PMC4072054 DOI: 10.1155/2014/817985] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 05/10/2014] [Accepted: 05/13/2014] [Indexed: 11/17/2022]
Abstract
“Lactose intolerance” is a medical problem for almost 70% of the world population. Milk and dairy products contain 5–10% w/v lactose. Hydrolysis of lactose by immobilized lactase is an industrial solution. In this work, we succeeded to increase the lactase loading capacity to more than 3-fold to 36.3 U/g gel using epoxy activated hydrogels compared to 11 U/g gel using aldehyde activated carrageenan. The hydrogel's mode of interaction was proven by FTIR, DSC, and TGA. The high activity of the epoxy group was regarded to its ability to attach to the enzyme's –SH, –NH, and –OH groups, whereas the aldehyde group could only bind to the enzyme's –NH2 group. The optimum conditions for immobilization such as epoxy chain length and enzyme concentration have been studied. Furthermore, the optimum enzyme conditions were also deliberated and showed better stability for the immobilized enzyme and the Michaelis constants, Km and Vmax, were doubled. Results revealed also that both free and immobilized enzymes reached their maximum rate of lactose conversion after 2 h, albeit, the aldehyde activated hydrogel could only reach 63% of the free enzyme. In brief, the epoxy activated hydrogels are more efficient in immobilizing more enzymes than the aldehyde activated hydrogel.
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27
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Missau J, Scheid AJ, Foletto EL, Jahn SL, Mazutti MA, Kuhn RC. Immobilization of commercial inulinase on alginate–chitosan beads. ACTA ACUST UNITED AC 2014. [DOI: 10.1186/2043-7129-2-13] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
The commercial inulinase obtained from Aspergillus niger was effectively immobilized on alginate-chitosan beads which were hardened with glutaraldehyde. The immobilization conditions were studied using Plackett & Burmann experimental design and central composite rotational design (CCRD). The effects of chitosan, glutaraldehyde, sodium alginate and calcium chloride concentrations in order to obtain a better immobilization yield were optimized. In the Plackett & Burman experimental design, the sodium alginate and calcium chloride had a significant effect (p < 0.1), but only the calcium chloride showed a positive effect, indicating that as higher the concentration, better is the immobilization yield. In the central composite rotational design (CCRD), the best results were obtained in the central point, using sodium alginate (1% w/v) and calcium chloride (4% w/v) as conditions for inulinase immobilization. By the CCRD, the optimal immobilization strategy was: chitosan (0.1% w/v), glutaraldehyde (0.1% v/v), sodium alginate (1% w/v) and calcium chloride (4% w/v). In this condition, the enzyme loading capacity was 668 U/g gel beads and the effect of temperature on the immobilized enzyme activity was also evaluated, showing better activity at 50°C. The immobilized enzyme maintained 76% of its activity in six days at room temperature.
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28
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Optimal immobilization of β-galactosidase onto κ-carrageenan gel beads using response surface methodology and its applications. ScientificWorldJournal 2014; 2014:571682. [PMID: 24672334 PMCID: PMC3929382 DOI: 10.1155/2014/571682] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 11/10/2013] [Indexed: 11/18/2022] Open
Abstract
β-Galactosidase (β-gal) was immobilized by covalent binding on novel κ-carrageenan gel beads activated by two-step method; the gel beads were soaked in polyethyleneimine followed by glutaraldehyde. 22 full-factorial central composite experiment designs were employed to optimize the conditions for the maximum enzyme loading efficiency. 11.443 U of enzyme/g gel beads was achieved by soaking 40 units of enzyme with the gel beads for eight hours. Immobilization process increased the pH from 4.5 to 5.5 and operational temperature from 50 to 55°C compared to the free enzyme. The apparent Km after immobilization was 61.6 mM compared to 22.9 mM for free enzyme. Maximum velocity Vmax was 131.2 μmol·min−1 while it was 177.1 μmol·min−1 for free enzyme. The full conversion experiment showed that the immobilized enzyme form is active as that of the free enzyme as both of them reached their maximum 100% relative hydrolysis at 4 h. The reusability test proved the durability of the κ-carrageenan beads loaded with β-galactosidase for 20 cycles with retention of 60% of the immobilized enzyme activity to be more convenient for industrial uses.
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29
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Elnashar MMM, Wahba MI, Amin MA, Eldiwany AI. Application of Plackett-Burman screening design to the modeling of grafted alginate-carrageenan beads for the immobilization of penicillin G acylase. J Appl Polym Sci 2013. [DOI: 10.1002/app.40295] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Magdy M. M. Elnashar
- Polymers Department; National Research Center; El-Behooth Street Dokki Cairo Egypt
- Centre of Scientific Excellence, Group of Biopolymers and Nanobiotechnology; National Research Center; Cairo Egypt
- College of Medicine; Taif University; Hawiya Taif Kingdom of Saudi Arabia
| | - Marwa I. Wahba
- Centre of Scientific Excellence, Group of Biopolymers and Nanobiotechnology; National Research Center; Cairo Egypt
- Department of Natural and Microbial Chemistry; National Research Center; El-Behooth Street Dokki Cairo Egypt
| | - Magdy A. Amin
- Microbiology Department; Faculty of Pharmacy; Cairo University
| | - Ahmed I. Eldiwany
- Department of Natural and Microbial Chemistry; National Research Center; El-Behooth Street Dokki Cairo Egypt
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30
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Dorati R, Genta I, Modena T, Conti B. Microencapsulation of a hydrophilic model molecule through vibration nozzle and emulsion phase inversion technologies. J Microencapsul 2013; 30:559-70. [DOI: 10.3109/02652048.2013.764938] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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31
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Production optimization of invertase by Lactobacillus brevis Mm-6 and its immobilization on alginate beads. Carbohydr Polym 2013; 93:740-6. [DOI: 10.1016/j.carbpol.2012.12.039] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 12/13/2012] [Indexed: 01/06/2023]
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32
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Stabilization of anthocyanin extract from jabuticaba skins by encapsulation using supercritical CO2 as solvent. Food Res Int 2013. [DOI: 10.1016/j.foodres.2011.04.019] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Figueira JA, Sato HH, Fernandes P. Establishing the feasibility of using β-glucosidase entrapped in Lentikats and in sol-gel supports for cellobiose hydrolysis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:626-34. [PMID: 23294439 DOI: 10.1021/jf304594s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
β-Glucosidases represent an important group of enzymes due to their pivotal role in various biotechnological processes. One of the most prominent is biomass degradation for the production of fuel ethanol from cellulosic agricultural residues and wastes, where the use of immobilized biocatalysts may prove advantageous. Within such scope, the present work aimed to evaluate the feasibility of entrapping β-glucosidase in either sol-gel or in Lentikats supports for application in cellobiose hydrolysis, and to perform the characterization of the resulting bioconversion systems. The activity and stability of the immobilized biocatalyst over given ranges of temperature and pH values were assessed, as well as kinetic data, and compared to the free form, and the operational stability was evaluated. Immobilization increased the thermal stability of the enzyme, with a 10 °C shift to an optimal temperature in the case of sol-gel support. Mass transfer hindrances as a result of immobilization were not significant, for sol-gel support. Lentikats-entrapped glucosidase was used in 19 consecutive batch runs for cellobiose hydrolysis, without noticeable decrease in product yield. Moreover, encouraging results were obtained for continuous operation. In the overall, the feasibility of using immobilized biocatalysts for cellobiose hydrolysis was established.
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Affiliation(s)
- Joelise A Figueira
- Department of Food Science, School of Food Engineering, University of Campinas-UNICAMP, Campinas, SP, Brazil
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34
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Zemolin GP, Gazoni M, Zabot GL, Golunski SM, Astolfi V, Prá VD, Foletto EL, Meili L, Rosa MBD, Rosa CD, Mossi AJ, Treichel H, Mazutti MA. Immobilization of inulinase obtained by solid-state fermentation using spray-drying technology. BIOCATAL BIOTRANSFOR 2012. [DOI: 10.3109/10242422.2012.715635] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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35
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Zhou H, Yang L, Li W, Shou Q, Xu P, Li W, Wang F, Yu P, Liu H. Improving the Stability of Immobilized Penicillin G Acylase via the Modification of Supports With Ionic Liquids. Ind Eng Chem Res 2012. [DOI: 10.1021/ie202745c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huacong Zhou
- State Key
Laboratory of Biochemical Engineering, Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Graduate School of Chinese Academy of Sciences, Beijing, 100039, China
| | - Liangrong Yang
- State Key
Laboratory of Biochemical Engineering, Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei Li
- State Key
Laboratory of Biochemical Engineering, Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Qinghui Shou
- State Key
Laboratory of Biochemical Engineering, Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Graduate School of Chinese Academy of Sciences, Beijing, 100039, China
| | - Peng Xu
- State Key
Laboratory of Biochemical Engineering, Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Graduate School of Chinese Academy of Sciences, Beijing, 100039, China
| | - Wensong Li
- State Key
Laboratory of Biochemical Engineering, Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Graduate School of Chinese Academy of Sciences, Beijing, 100039, China
| | - Fuchun Wang
- State Key
Laboratory of Biochemical Engineering, Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Graduate School of Chinese Academy of Sciences, Beijing, 100039, China
| | - Pinhua Yu
- State Key
Laboratory of Biochemical Engineering, Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Graduate School of Chinese Academy of Sciences, Beijing, 100039, China
| | - Huizhou Liu
- State Key
Laboratory of Biochemical Engineering, Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
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36
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Canli O, Kurbanoglu EB. Application of low magnetic field on inulinase production by Geotrichum candidum under solid state fermentation using leek as substrate. Toxicol Ind Health 2011; 28:894-900. [DOI: 10.1177/0748233711425079] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study evaluates the application of low magnetic field (LMF) on inulinase enzyme production by Geotrichum candidum under solid state fermentation (SSF) using leek as potential carbon source. First, the fermentation conditions were optimized using normal magnetic field grown microorganism. Among eight G. candidum isolates, the most effective strain called G. candidum OC-7 was selected to use in further experiments. In the second part of the study, SSF was carried out under different LMFs (4 and 7 mT). The results showed that inulinase activity was strongly affected by LMF application. The highest enzyme activity was obtained as 535.2 U/g of dry substrate (gds) by 7 mT magnetic field grown G. candidum OC-7. On the contrary, the control had only 412.1 U/gds. Consequently, the use of leek presents a great potential as an alternative carbon source for inulinase production and magnetic field treatment could effectively be used in order to enhance the enzyme production.
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Affiliation(s)
- Ozden Canli
- Department of Biology, Ataturk University, Erzurum, Turkey
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37
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Santa GLM, Bernardino SMSA, Magalhães S, Mendes V, Marques MPC, Fonseca LP, Fernandes P. From inulin to fructose syrups using sol-gel immobilized inulinase. Appl Biochem Biotechnol 2011; 165:1-12. [PMID: 21445597 DOI: 10.1007/s12010-011-9228-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Accepted: 03/08/2011] [Indexed: 11/25/2022]
Abstract
The present work aims to provide the basic characterization of sol-gel immobilized inulinase, a biocatalyst configuration yet unexploited, using as model system the hydrolysis of inulin to fructose. Porous xerogel particles with dimensions in slight excess of 10 μm were obtained, yielding an immobilization efficiency of roughly 80%. The temperature- and pH-activity profiles displayed a broader bell-shaped pattern as a result of immobilization. In the latter case, a shift of the optimal pH of 0.5 pH units was observed towards a less acidic environment. The kinetic parameters estimated from the typical Michaelis-Menten kinetics suggest that immobilization in sol-gel did not tamper with the native enzyme conformation, but on the other hand, entrapment brought along mass transfer limitations. The sol-gel biocatalyst displayed a promising operational stability, since it was used in more than 20 consecutive 24-hour batch runs without noticeable decay in product yield. The performance of sol-gel biocatalyst particles doped with magnetite roughly matched the performance of simple sol-gel particles in a single batch run. However, the operational stability of the former proved poorer, since activity decay was evident after four consecutive 24-hour batch runs.
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Affiliation(s)
- Gonçalo L M Santa
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior Técnico, 1049-001, Lisbon, Portugal
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