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Mohammad A, Srivastava M, Ahmad I, Singh R, Deen PR, Rai A, Lal B, Srivastava N, Gupta VK. Prospects of graphene quantum dots preparation using lignocellulosic wastes for application in photofermentative hydrogen production. CHEMOSPHERE 2024:142804. [PMID: 39029708 DOI: 10.1016/j.chemosphere.2024.142804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 06/06/2024] [Accepted: 07/06/2024] [Indexed: 07/21/2024]
Abstract
Graphene quantum dots (GQDs) are a novel carbon nanomaterial from the graphene family due to their unique physicochemical properties and diverse range of applications. However, in terms of the sustainable utility of GQDs, their synthesis methods are the main roadblock because of their high production costs and the release of toxic byproducts during the production processes. Thus, the search for sustainable and economical fabrication methods for preparing GQDs is one of the most essential areas of research for their practical applications. In this context, lignocellulosic biomass (LCB) wastes are a prime choice for the fabrication of GQDs due to their high carbon and cellulose content, which are favorable for being employed as precursors and reducing agents Additionally, LCBs are a prime source of potential bioenergy production, which is currently a key research hotspot to combat environmental pollution, global warming, and energy crises. Therefore, the present review provides feasibility for sustainable and environmentally friendly fabrication of GQDs using LCB wastes for their possible utility in cellulosic biofuel production technology improvement. Furthermore, the prospective of using these GQDs as catalysts in bioenergy production for the development of low-cost biomass-based biofuel production technology has been discussed along with the existing limitations and their sustainable recommendation.
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Affiliation(s)
- Akbar Mohammad
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Manish Srivastava
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Irfan Ahmad
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Rajeev Singh
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Prakash Ranjan Deen
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Ashutosh Rai
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Basant Lal
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Neha Srivastava
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Vijai Kumar Gupta
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom.
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da Cruz LF, Polizeli AG, Enzweiler H, Paulino AT. Stabilization of β-D-galactosidase in solution containing chitosan-based membrane: Central composite rotatable design. Int J Biol Macromol 2024; 273:132992. [PMID: 38857718 DOI: 10.1016/j.ijbiomac.2024.132992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 02/01/2024] [Accepted: 06/05/2024] [Indexed: 06/12/2024]
Abstract
β-D-galactosidase is a hydrolase enzyme capable of hydrolyzing lactose in milk-based foods. Its free form can be inactivated in solution during the production of low-dosage lactose foods. Then, it is important to study strategies for avoiding the free enzyme inactivation with the aim of circumventing this problem. The stabilization of β-D-galactosidase in aqueous solution after interactions with chitosan/eucalyptus sawdust composite membrane proved to be a potential strategy when optimized by central composite rotatable (CCR) design. In this case, the best experimental conditions for β-D-galactosidase partitioning and stability in an aqueous medium containing the chitosan-based composite membrane reinforced with eucalyptus sawdust were i) enzyme/buffer solution ratio of 0.0057, ii) pH 5.6, iii) membrane mass of 50 mg, and iv) temperature lower than 37 °C. Significance was found for the linear enzyme/buffer solution ratio, linear temperature, and quadratic pH (p < 0.05) in the interval between 0 and 60 min of study. In the interval between 60 and 120 min, there was significance (p < 0.12) for linear temperature, the temperature-enzyme/buffer solution ratio interaction and the interaction between linear pH and linear enzyme/buffer solution ratio. The Pareto charts and response surfaces clearly showed all the effects of the experimental variables on the stabilization of β-D-galactosidase in solution after interactions with the chitosan composite membrane. In this case, industrial food reactors covered with chitosan/eucalyptus sawdust composite membrane could be a strategy for the hydrolysis of lactose during milk-producing processes.
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Affiliation(s)
- Larissa Fernandes da Cruz
- Santa Catarina State University, Postgraduate Program in Food Science and Technology, Br 282, Km 574, Linha Santa Terezinha, 89870-000 Pinhalzinho, SC, Brazil
| | - Amanda Gentil Polizeli
- Santa Catarina State University, Postgraduate Program in Food Science and Technology, Br 282, Km 574, Linha Santa Terezinha, 89870-000 Pinhalzinho, SC, Brazil
| | - Heveline Enzweiler
- Santa Catarina State University, Department of Food and Chemical Engineering, Br 282, Km 574, Linha Santa Terezinha, 89870-000 Pinhalzinho, SC, Brazil
| | - Alexandre Tadeu Paulino
- Santa Catarina State University, Postgraduate Program in Food Science and Technology, Br 282, Km 574, Linha Santa Terezinha, 89870-000 Pinhalzinho, SC, Brazil; Santa Catarina State University, Department of Chemistry, Rua Paulo Malschitzki, 200, Zona Industrial Norte, 89219-710 Joinville, SC, Brazil.
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3
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Wahba MI. Grafted calcium pectinate-whey protein isolate covalent immobilizers: Optimization, kinetics, thermodynamics, and application. J Biotechnol 2024; 388:35-48. [PMID: 38641136 DOI: 10.1016/j.jbiotec.2024.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 03/01/2024] [Accepted: 04/15/2024] [Indexed: 04/21/2024]
Abstract
Whey protein isolate (WPI) was incorporated within calcium pectinate (CPT) beads in order to boost their anionic qualities and meliorate their glutaraldehyde (GA)-polyethyleneimine (PEI) grafting process. The Box-Behnken Design (BBD) verified that WPI inclusion significantly raised the GA-PEI-CPT-WPI beads immobilized β-D-galactosidase (iβ-GLD) activity. The BBD also revealed the optimal settings for WPI concentration, PEI pH, PEI concentration, and GA concentration, which were 2.91 %, 10.8, 3.5 %, and 2.24 %, respectively. The GA-PEI-CPT-WPI beads grafting process was scrutinized via FTIR, EDX, and SEM. The optimal GA-PEI-CPT-WPI immobilizers provided fine β-GLD immobilization efficiencies, which reached up to 65.28 %. The free and GA-PEI-CPT-WPI iβ-GLDs pH and temperature profiles were scrutinized. It was also unveiled that the thermal stability of the iβ-GLD surpassed that of its free compeer as it provided lesser kd and ΔS values and larger t1/2, D-values, Ed, ΔH, and ΔG values. Furthermore, the iβ-GLD provided 92.00±3.39 % activity after 42 storage days, which denoted its fine storage stability. The iβ-GLD short duration (15 min) operational stability was also inspected, and 82.70±0.78 % activity was provided during the fifteenth degradation run. Moreover, the iβ-GLD long duration (24 h) operational stability was inspected while degrading the lactose of buffered lactose solution (BLS) and cheese whey (CW). It was unveiled that 81.86±0.96 % and 73.58±2.24 % of the initial glucose were detected during the sixth degradation runs, respectively.
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Affiliation(s)
- Marwa I Wahba
- Department of Chemistry of Natural and Microbial Products, National Research Centre, El-Behooth St., Dokki, Giza, Egypt; Centre of Scientific Excellence-Group of Advanced Materials and Nanotechnology, National Research Centre, El-Behooth St., Dokki, Giza, Egypt.
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4
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Kumar A, Dutt R, Srivastava A, Kayastha AM. Immobilization of α-amylase onto functionalized molybdenum diselenide nanoflowers (MoSe 2-NFs) as scaffolds: Characterization, kinetics, and potential applications in starch-based industries. Food Chem 2024; 442:138431. [PMID: 38262279 DOI: 10.1016/j.foodchem.2024.138431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 01/01/2024] [Accepted: 01/11/2024] [Indexed: 01/25/2024]
Abstract
The current study presents the application of molybdenum diselenide nanoflowers (MoSe2-NFs) as an innovative substrate for immobilizing α-amylase by glutaraldehyde activation. This approach results in the development of a nanobiocatalyst that exhibits remarkable advantages compared to a standalone enzyme. Several physical methods, such as fluorescence microscopy, FT-IR, SEM, TEM, XRD, AFM, and Raman spectroscopy, were used to confirm that α-amylase was successfully attached to MoSe2-NFs. By employing the Box-Behnken design of the RSM, the parameters were optimized, resulting in an immobilization efficiency of roughly 87.33%. The immobilized variant of α-amylase demonstrated superior thermostability, pH stability, reusability, and storage stability in comparison to the soluble enzyme. The catalytic activity of α-amylase was highest when immobilized on MoSe2-NFs at the same pH and temperature as the soluble enzyme. However, there was an expansion in the range of parameters in which this activity was observed. Furthermore, the immobilized enzyme exhibited a retention of nearly 80% residual activity following 12 successive reuses. The immobilized enzyme exhibited around 82% residual activity after being stored for 120 days. It is possible that the immobilization process changed the Michaelis-Menten constant, which means that the substrate could no longer reach certain active sites on the enzyme because it had become longer. The study's findings suggest that the α-amylase-MoSe2-NFs system could be useful in industry because it can work in a wider range of temperature and pH conditions. Furthermore, the intrinsic non-toxic characteristics of the matrix, along with its ability to be kept for prolonged periods and recycled, render nano biocatalysts very well-suited for the effective synthesis of maltose in the food and pharmaceutical industries.
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Affiliation(s)
- Avinash Kumar
- School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi 221005, India; Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Ravi Dutt
- School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi 221005, India; Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Anchal Srivastava
- School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi 221005, India; Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
| | - Arvind M Kayastha
- School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi 221005, India; Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
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5
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Kaptan Usul S, Binay B, Soydan AM, Aslan A. A newly synthesized magnetic nanoparticle coated with glycidyl methacrylate monomer and 1,2,4-Triazole: Immobilization of α-Amylase from Bacillus licheniformis for more reuse, stability, and activity in the presence of H 2O 2. Bioorg Chem 2024; 143:107068. [PMID: 38181659 DOI: 10.1016/j.bioorg.2023.107068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/11/2023] [Accepted: 12/24/2023] [Indexed: 01/07/2024]
Abstract
α-Amylase is a secretory enzyme commonly found in nature. The α-Amylase enzyme catalyzes the hydrolysis of α-D-(1,4)-glucosidic bonds in starch, glycogen, and polysaccharides. The chemical characterization of the composite carrier and the immobilized enzyme was performed, and the accuracy of the immobilization was confirmed by FTIR, SEM, and EDS analyses. The X-ray diffraction (XRD) analysis indicates that the magnetic nanoparticle retained its magnetic properties following the modification process. Based on the Thermogravimetric Analysis (TGA) outcomes, it was evident that the structural integrity of the FPT nanocomposite remained unchanged at 200°C. The optimal pH was determined to be 5.5, and no alteration was observed following the immobilization process. Purified α-amylases usually lose their activity rapidly above 50°C. In this study, Bacillus licheniformis α-Amylase enzyme was covalently immobilized on the newly synthesized magnetic composite carrier having more azole functional group. For novelty-designed immobilized enzymes, while there is no change in the pH and optimum operating temperature of the enzyme with immobilization, two essential advantages are provided to reduce enzyme costs: the storage stability and reusability are increased. Furthermore, our immobilization technique enhanced enzyme stability when comparing our immobilized enzyme with the reference enzyme in industrial applications. The activity of the immobilized enzyme was higher in presence of 1-3% H2O2.
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Affiliation(s)
- Sedef Kaptan Usul
- Department of Bioengineering, Gebze Technical University, Kocaeli, Turkey.
| | - Barış Binay
- Department of Bioengineering, Gebze Technical University, Kocaeli, Turkey; BAUZYME Biotechnology Co., Gebze Technical University Technopark, Gebze, 41400 Kocaeli, Turkey.
| | - Ali Murat Soydan
- Institute of Energy Technologies, Gebze Technical University, Kocaeli, Turkey.
| | - Ayşe Aslan
- Department of Bioengineering, Gebze Technical University, Kocaeli, Turkey; Institute of Energy Technologies, Gebze Technical University, Kocaeli, Turkey.
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Kyomuhimbo HD, Feleni U, Haneklaus NH, Brink H. Recent Advances in Applications of Oxidases and Peroxidases Polymer-Based Enzyme Biocatalysts in Sensing and Wastewater Treatment: A Review. Polymers (Basel) 2023; 15:3492. [PMID: 37631549 PMCID: PMC10460086 DOI: 10.3390/polym15163492] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/10/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
Oxidase and peroxidase enzymes have attracted attention in various biotechnological industries due to their ease of synthesis, wide range of applications, and operation under mild conditions. Their applicability, however, is limited by their poor stability in harsher conditions and their non-reusability. As a result, several approaches such as enzyme engineering, medium engineering, and enzyme immobilization have been used to improve the enzyme properties. Several materials have been used as supports for these enzymes to increase their stability and reusability. This review focusses on the immobilization of oxidase and peroxidase enzymes on metal and metal oxide nanoparticle-polymer composite supports and the different methods used to achieve the immobilization. The application of the enzyme-metal/metal oxide-polymer biocatalysts in biosensing of hydrogen peroxide, glucose, pesticides, and herbicides as well as blood components such as cholesterol, urea, dopamine, and xanthine have been extensively reviewed. The application of the biocatalysts in wastewater treatment through degradation of dyes, pesticides, and other organic compounds has also been discussed.
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Affiliation(s)
- Hilda Dinah Kyomuhimbo
- Department of Chemical Engineering, University of Pretoria, Pretoria 0028, South Africa;
| | - Usisipho Feleni
- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa, Florida Campus, Roodepoort, Johannesburg 1710, South Africa;
| | - Nils H. Haneklaus
- Transdisciplinarity Laboratory Sustainable Mineral Resources, University for Continuing Education Krems, 3500 Krems, Austria;
| | - Hendrik Brink
- Department of Chemical Engineering, University of Pretoria, Pretoria 0028, South Africa;
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Mandal D, Sarkar T, Chakraborty R. Critical Review on Nutritional, Bioactive, and Medicinal Potential of Spices and Herbs and Their Application in Food Fortification and Nanotechnology. Appl Biochem Biotechnol 2023; 195:1319-1513. [PMID: 36219334 PMCID: PMC9551254 DOI: 10.1007/s12010-022-04132-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2022] [Indexed: 01/24/2023]
Abstract
Medicinal or herbal spices are grown in tropical moist evergreen forestland, surrounding most of the tropical and subtropical regions of Eastern Himalayas in India (Sikkim, Darjeeling regions), Bhutan, Nepal, Pakistan, Iran, Afghanistan, a few Central Asian countries, Middle East, USA, Europe, South East Asia, Japan, Malaysia, and Indonesia. According to the cultivation region surrounded, economic value, and vogue, these spices can be classified into major, minor, and colored tropical spices. In total, 24 tropical spices and herbs (cardamom, black jeera, fennel, poppy, coriander, fenugreek, bay leaves, clove, chili, cassia bark, black pepper, nutmeg, black mustard, turmeric, saffron, star anise, onion, dill, asafoetida, celery, allspice, kokum, greater galangal, and sweet flag) are described in this review. These spices show many pharmacological activities like anti-inflammatory, antimicrobial, anti-diabetic, anti-obesity, cardiovascular, gastrointestinal, central nervous system, and antioxidant activities. Numerous bioactive compounds are present in these selected spices, such as 1,8-cineole, monoterpene hydrocarbons, γ-terpinene, cuminaldehyde, trans-anethole, fenchone, estragole, benzylisoquinoline alkaloids, eugenol, cinnamaldehyde, piperine, linalool, malabaricone C, safrole, myristicin, elemicin, sinigrin, curcumin, bidemethoxycurcumin, dimethoxycurcumin, crocin, picrocrocin, quercetin, quercetin 4'-O-β-glucoside, apiol, carvone, limonene, α-phellandrene, galactomannan, rosmarinic acid, limonene, capsaicinoids, eugenol, garcinol, and α-asarone. Other than that, various spices are used to synthesize different types of metal-based and polymer-based nanoparticles like zinc oxide, gold, silver, selenium, silica, and chitosan nanoparticles which provide beneficial health effects such as antioxidant, anti-carcinogenic, anti-diabetic, enzyme retardation effect, and antimicrobial activity. The nanoparticles can also be used in environmental pollution management like dye decolorization and in chemical industries to enhance the rate of reaction by the use of catalytic activity of the nanoparticles. The nutritional value, phytochemical properties, health advantages, and both traditional and modern applications of these spices, along with their functions in food fortification, have been thoroughly discussed in this review.
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Affiliation(s)
- Debopriya Mandal
- Department of Food Technology and Biochemical Engineering, Jadavpur University, Kolkata, 700032, India
| | - Tanmay Sarkar
- Department of Food Processing Technology, Malda Polytechnic, West Bengal State Council of Technical Education, Govt. of West Bengal, Malda, 732102, India.
| | - Runu Chakraborty
- Department of Food Technology and Biochemical Engineering, Jadavpur University, Kolkata, 700032, India.
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Wahba MI. Boosting the stability of β-galactosidase immobilized onto soy-protein isolate-glutaraldehyde-functionalized carrageenan beads. 3 Biotech 2023; 13:32. [PMID: 36606138 PMCID: PMC9807714 DOI: 10.1007/s13205-022-03446-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 12/20/2022] [Indexed: 01/04/2023] Open
Abstract
Uncontrolled enzyme-immobilizer interactions were evident after immobilizing β-galactosidase onto soy-protein isolate-glutaraldehyde-functionalized carrageenan beads. Such interactions triggered shortcomings in the immobilized β-galactosidase (iβGL) thermal and storage stabilities. The thermal stability of the iβGL was somewhat lesser than that of the free βGL. Moreover, the iβGL suffered an initial sharp fall-off in its activity after storing it. Thus, approaches were adopted to prevent the occurrence of such uncontrolled enzyme-immobilizer interactions, and accordingly, boost the stability of the iβGL. These approaches involved neutralizing the covalently reactive GA entities via glycine and also altering the functionalizing GA concentrations. Nonetheless, no improvement was recorded in the iβGL thermal stability and this indicated that the uncontrolled enzyme-immobilizer interactions were not mediated via GA. Another approach was then attempted which involved treating the iβGL with lactose. The lactose-treated iβGL (LT-iβGL) presented superior thermal stability as was verified from its smaller k d and bigger t 1/2 and D-values. The LT-iβGL t 1/2 values were 5.60 and 3.53 fold higher than those presented by the free βGL at 62 and 65 °C, respectively. Moreover, the LT- iβGL presented loftier ΔG than did the free βGL. The storage stability of the LT- iβGL was also superior as it offered 100.41% of its commencing activity on its 43rd storage day. Thus, it could be concluded that lactose prevented the uncontrolled enzyme-immobilizer interactions. Finally, advantageous galacto-oligosaccharides (GOS) were prepared via the iβGL. The GOS were then analyzed with mass spectrometry, and it was shown that their degree of polymerization reached up to 7.
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Affiliation(s)
- Marwa I. Wahba
- grid.419725.c0000 0001 2151 8157Department of Chemistry of Natural and Microbial Products, National Research Center, El-Behooth St., Dokki, Giza, Egypt ,grid.419725.c0000 0001 2151 8157Centre of Scientific Excellence-Group of Advanced Materials and Nanotechnology, National Research Centre, El-Behooth St., Dokki, Giza, Egypt
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Anchoring lactase in pectin-based hydrogels for lactose hydrolysis reactions. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.08.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Immobilization of α-Amylase onto Quantum Dots Prepared from Hypericum perforatum L. Flowers and Hypericum capitatum Seeds: Its Physicochemical and Biochemical Characterization. Top Catal 2022. [DOI: 10.1007/s11244-022-01699-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Biochemical Insights into the functionality of a novel thermostable β-amylase from Dioclea reflexa. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Xie J, Zhang Y, Simpson B. Food enzymes immobilization: novel carriers, techniques and applications. Curr Opin Food Sci 2022. [DOI: 10.1016/j.cofs.2021.09.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Production and Partial Characterization of α-Amylase Enzyme from Marine Actinomycetes. BIOMED RESEARCH INTERNATIONAL 2021; 2021:5289848. [PMID: 34917683 PMCID: PMC8670945 DOI: 10.1155/2021/5289848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/20/2021] [Accepted: 10/30/2021] [Indexed: 01/05/2023]
Abstract
Amylase producing actinobacteria were isolated and characterized from terrestrial environment. There are a limited number of reports investigating the marine environment; hence, in the present study, four marine enzymes were tested for their amylase production ability. On starch agar plates, the Streptomyces rochei strain showed a higher hydrolytic zone (24 mm) than the other isolates. Growth under optimized culture conditions using Plackett-Burman's experimental design led to a 1.7, 9.8, 7.7, and 3.12-fold increase for the isolates S. griseorubens, S. rochei, S. parvus, and Streptomyces sp., respectively, in the specific activity measurement. When applying the Box-Behnken design on S. rochei using the most significant parameters (starch, K2HPO4, pH, and temperature), there was a 12.22-fold increase in the specific activity measurement 7.37 U/mg. The α-amylase was partially purified, and its molecular weight was determined using sodium dodecyl sulfate-polyacrylamide gel electrophoresis. α-Amylase was particularly active at pH 6 and 65°C. The purified enzyme was most active at 65°C and pH 6, thermal stability of 70°C for 40 min, and salt concentration of 1 M with Km and Vmax of 6.58 mg/ml and 21.93 μmol/ml/min, respectively. The α-amylase was improved by adding Cu+2, Zn+2, and Fe+2 (152.21%, 207.24%, and 111.89%). Increased production of α-amylase enzyme by S. rochei KR108310 leads to production of significant industrial products.
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Jacob AG, Wahab RA, Misson M. Operational Stability, Regenerability, and Thermodynamics Studies on Biogenic Silica/Magnetite/Graphene Oxide Nanocomposite-Activated Candida rugosa Lipase. Polymers (Basel) 2021; 13:polym13213854. [PMID: 34771409 PMCID: PMC8587300 DOI: 10.3390/polym13213854] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/02/2021] [Accepted: 11/02/2021] [Indexed: 11/24/2022] Open
Abstract
Inorganic biopolymer-based nanocomposites are useful for stabilizing lipases for enhanced catalytic performance and easy separation. Herein, we report the operational stability, regenerability, and thermodynamics studies of the ternary biogenic silica/magnetite/graphene oxide nanocomposite (SiO2/Fe3O4/GO) as a support for Candida rugosa lipase (CRL). The X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), field-electron scanning electron microscopy (FESEM), vibrating sample magnetometry (VSM), and nitrogen adsorption/desorption data on the support and biocatalyst corroborated their successful fabrication. XPS revealed the Fe3O4 adopted Fe2+ and Fe3+ oxidation states, while XRD data of GO yielded a peak at 2θ = 11.67°, with the SiO2/Fe3O4/GO revealing a high surface area (≈261 m2/g). The fourier transform infrared (FTIR) spectra affirmed the successful fabricated supports and catalyst. The half-life and thermodynamic parameters of the superparamagnetic immobilized CRL (CRL/SiO2/Fe3O4/GO) improved over the free CRL. The microwave-regenerated CRL/SiO2/Fe3O4/GO (≈82%) exhibited higher catalytic activity than ultrasonic-regenerated (≈71%) ones. Lower activation (Ea) and higher deactivation energies (Ed) were also noted for the CRL/SiO2/Fe3O4/GO (13.87 kJ/mol, 32.32 kJ/mol) than free CRL (15.26 kJ/mol, 27.60 kJ/mol). A peak at 4.28 min in the gas chromatograph-flame ionization detection (GC-FID) chromatogram of the purified ethyl valerate supported the unique six types of 14 hydrogen atoms of the ester (CAS: 539-82-2) in the proton nuclear magnetic resonance (1H-NMR) data. The results collectively demonstrated the suitability of SiO2/Fe3O4/GO in stabilizing CRL for improved operational stability and thermodynamics and permitted biocatalyst regenerability.
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Affiliation(s)
- Adikwu Gowon Jacob
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Johor, Malaysia;
- Department of Applied Chemistry, Federal University Dutsin-Ma (FUDMA), Dutsin-Ma P.M.B. 5001, Katsina State, Nigeria
- Enzyme Technology and Green Synthesis Group, Faculty of Science, Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Johor, Malaysia
| | - Roswanira Abdul Wahab
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Johor, Malaysia;
- Enzyme Technology and Green Synthesis Group, Faculty of Science, Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Johor, Malaysia
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Johor, Malaysia
- Correspondence: or (R.A.W.); (M.M.)
| | - Mailin Misson
- Biotechnology Research Institute, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu 88400, Sabah, Malaysia
- Correspondence: or (R.A.W.); (M.M.)
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15
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Performance of Candida rugosa lipase supported on nanocellulose-silica-reinforced polyethersulfone membrane for the synthesis of pentyl valerate: Kinetic, thermodynamic and regenerability studies. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111852] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Wang J, Guo H, Huang J, Jiang S, Hou S, Chen X, Lv H, Bi X, Hou M, Lin H, Lu Y, Qiao J, Yang R, Liu S. L-Lactic acid production from fructose by chitosan film-coated sodium alginate-polyvinyl alcohol immobilized Lactobacillus pentosus cells and its kinetic analysis. BIORESOUR BIOPROCESS 2021; 8:27. [PMID: 38650211 PMCID: PMC10992738 DOI: 10.1186/s40643-021-00380-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/30/2021] [Indexed: 12/12/2022] Open
Abstract
Under the optimal conditions of immobilization and fermentation, the highest LA yield of 0.966 ± 0.006 g/g fructose and production rate of 2.426 ± 0.018 g/(L × h) with an error of -0.5% and -0.2% to the predicted results were obtained from batch fermentation by the CS film-coated SA-PVA immobilized L. pentosus cells. The LA yield and production rate of these immobilized cells were 2.7% and 10.1% higher than that of normal SA-PVA immobilized cells respectively, and they were 5.7% and 48.4% higher than that of free cells, respectively. The effect of temperature on different types of immobilized cells and free cells was significantly different, but the effect of pH on different types of cells was not much different. The kinetic models could effectively describe the different fermentation performances of three types of cells. The immobilized cells have excellent reusability to conduct 9 runs of repeated batch fermentation.
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Affiliation(s)
- Jianfei Wang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Huanyu Guo
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Jiaqi Huang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
- The Center for Biotechnology and Interdisciplinary Studies (CBIS) at Rensselaer Polytechnic Institute, Troy, NY12180, USA
| | - Shaoming Jiang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Shibo Hou
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Xingyu Chen
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Hujie Lv
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Xudong Bi
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
- California State University, Los Angeles (CSULA), Los Angeles, CA, 90032, USA
| | - Maolin Hou
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Hebei Lin
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Yuming Lu
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Jinyue Qiao
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Ruiyi Yang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA
| | - Shijie Liu
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY13210, USA.
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17
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Ghasemi S, Yousefi M, Nikseresht A, Omidi H. Covalent binding and in-situ immobilization of lipases on a flexible nanoporous material. Process Biochem 2021. [DOI: 10.1016/j.procbio.2020.12.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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18
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Zhong L, Li J, Tian D, Cai J, Wang H, Ma Q. Immobilization of polyphenol oxidase on chitosan/organic rectorite composites for phenolic compounds removal. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:906-921. [PMID: 33617497 DOI: 10.2166/wst.2021.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Chitosan/organic rectorite (CTS/OREC) composites were prepared and characterized by Fourier transform infrared spectrometry and X-ray diffraction. Polyphenol oxidase (PPO) was immobilized on CTS/OREC by physical adsorption (APPO) and covalent binding (CPPO). Taguchi method was applied in the optimization of immobilization conditions resulting in the highest enzyme activity of 16.37 × 103 and 8.92 × 103U/g for APPO and CPPO, respectively. APPO enzyme activity was higher than that of CPPO, while CPPO showed the higher enzyme loading capacity than that of APPO. The removal percentage of phenolic compound, including phenol (PH), 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP), by immobilized PPO was also explored. The results indicated that APPO was more efficient in phenolic compounds removal than CPPO. APPO contributed to a quick removal in the first hour, and the removal percentage of PH, 4-CP and 2,4-DCP could reach 69.3 ± 4.2%, 89.8 ± 2.5% and 93.8 ± 1.7% within 2 h, respectively. The order of removal percentage of phenolic compounds for both immobilized PPO was 2,4-DCP > 4-CP > PH. After 10 consecutive operations, the removal percentage of 2,4-DCP reached 73.2 ± 2.6% and 60.3 ± 1.5% for APPO and CPPO, respectively. The results introduced a novel support for PPO immobilization, and the immobilized PPO had great potential in wastewater treatment.
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Affiliation(s)
- Lian Zhong
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Jin Li
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China E-mail: ; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Dawei Tian
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Jun Cai
- Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China
| | - Han Wang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Qimin Ma
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China E-mail: ; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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19
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Wang J, Jiang S, Huang J, Guo H, Bi X, Hou M, Chen X, Hou S, Lin H, Lu Y, Lv H, Qiao J, Yang R, Liu S. Optimization of Initial Cation Concentrations for L-Lactic Acid Production from Fructose by Lactobacillus pentosus Cells. Appl Biochem Biotechnol 2021; 193:1496-1512. [PMID: 33484444 DOI: 10.1007/s12010-021-03492-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Accepted: 01/07/2021] [Indexed: 11/29/2022]
Abstract
In this study, Box-Behnken design was applied to optimize the initial concentrations of 4 cations for L-lactic acid production from fructose by homologous batch fermentation of Lactobacillus pentosus cells. The optimum initial cation concentrations were obtained as 6.542 mM Mg2+, 3.765 mM Mn2+, 2.397 mM Cu2+, and 3.912 mM Fe2+, respectively. The highest L-lactic acid yield and productivity were obtained as 0.935 ± 0.005 g/g fructose and 1.363 ± 0.021 g/(L × h), respectively, with a maximum biomass concentration of 7.97 ± 0.17 g/L. The effectiveness of the optimization by Box-Behnken design was confirmed based on the small errors between predicted results and experimental results shown as 0.3%, - 0.2%, and - 1.2%, respectively. The quadratic models with high accuracy and reliability can be applied to mathematically forecasted the fermentation performance. After the optimization, the lactic acid yield and productivity were significantly improved by 3.7% and 21.0%, respectively.
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Affiliation(s)
- Jianfei Wang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Shaoming Jiang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Jiaqi Huang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA.,The Center for Biotechnology & Interdisciplinary Studies (CBIS) at Rensselaer Polytechnic Institute, Troy, NY, 12180, USA
| | - Huanyu Guo
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Xudong Bi
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA.,California State University, Los Angeles (CSULA), Los Angeles, CA, 90032, USA
| | - Maolin Hou
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA.,Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Xingyu Chen
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Shibo Hou
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Hebei Lin
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Yuming Lu
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Hujie Lv
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Jinyue Qiao
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Ruiyi Yang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Shijie Liu
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA.
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20
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Shahedi M, Habibi Z, Yousefi M, Brask J, Mohammadi M. Improvement of biodiesel production from palm oil by co-immobilization of Thermomyces lanuginosa lipase and Candida antarctica lipase B: Optimization using response surface methodology. Int J Biol Macromol 2020; 170:490-502. [PMID: 33383081 DOI: 10.1016/j.ijbiomac.2020.12.181] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/23/2020] [Accepted: 12/23/2020] [Indexed: 12/14/2022]
Abstract
Candida antarctica lipase B (CALB) and Thermomyces lanuginose lipase (TLL) were co-immobilized on epoxy functionalized silica gel via an isocyanide-based multicomponent reaction. The immobilization process was carried out in water (pH 7) at 25 °C, rapidly (3 h) resulting in high immobilization yields (100%) with a loading of 10 mg enzyme/g support. The immobilized preparations were used to produce biodiesel by transesterification of palm oil. In an optimization study, response surface methodology (RSM) and central composite rotatable design (CCRD) methods were used to study the effect of five independent factors including temperature, methanol to oil ratio, t-butanol concentration and CALB:TLL ratio on the yield of biodiesel production. The optimum combinations for the reaction were CALB:TLL ratio (2.1:1), t-butanol (45 wt%), temperature (47 °C), methanol: oil ratio (2.3). This resulted in a FAME yield of 94%, very close to the predicted value of 98%.
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Affiliation(s)
- Mansour Shahedi
- Department of Organic Chemistry and Oil, Faculty of Chemistry, Shahid Beheshti University, Tehran, Iran
| | - Zohreh Habibi
- Department of Organic Chemistry and Oil, Faculty of Chemistry, Shahid Beheshti University, Tehran, Iran.
| | - Maryam Yousefi
- Nanobiotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran.
| | - Jesper Brask
- Novozymes A/S, Krogshøjvej 36, 2880 Bagsværd, Copenhagen, Denmark
| | - Mehdi Mohammadi
- Bioprocess Engineering Department, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
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21
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Desai RP, Dave D, Suthar SA, Shah S, Ruparelia N, Kikani BA. Immobilization of α-amylase on GO-magnetite nanoparticles for the production of high maltose containing syrup. Int J Biol Macromol 2020; 169:228-238. [PMID: 33338531 DOI: 10.1016/j.ijbiomac.2020.12.101] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 12/11/2020] [Accepted: 12/13/2020] [Indexed: 11/28/2022]
Abstract
Robust amylases with stability and catalysis at multitude of extremities are the need of an hour. Enzyme immobilization may prove beneficial at commercial scale to achieve such attributes. In the present study, a commercially available amylase was immobilized on graphene oxide (GO) - magnetite (Fe3O4) nanoparticles through covalent bonding. The structural and morphological characterizations were conducted by XRD, SEM and TEM. Further, FTIR and TGA confirmed the interaction between amylase, GO and nanoparticles. The variables, such as concentrations of GO (1.3 mg), Fe3O4 (58 μg), and amylase (4.5 mg) were optimized by the response surface methodology using central composite design. High loading capacity of 77.58 μg amylase over 1 μg GO-magnetite nanoparticles was achieved under optimum conditions. Biochemically, the pH optimum remained unaltered, i.e., pH 7, whereas, the alkalitolerance was increased by ~20% in relative activities upon immobilization. The half-life of soluble amylase was 13 h, which enhanced to 20 h upon immobilization in 20 mM phosphate buffer, pH 7 at 50 °C. Besides, the thermodynamic parameters supported the stability trends. The immobilized amylase could be used for 11 subsequent cycles. The mentioned attributes and the dextrose equivalent values during the production of high maltose containing syrup highlighted its commercialization.
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Affiliation(s)
- Rucha P Desai
- Department of Physical Sciences, P.D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), Changa 388 421, Gujarat, India
| | - Dolly Dave
- Department of Biological Sciences, P.D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), Changa 388 421, Gujarat, India
| | - Sadikhusain A Suthar
- Department of Biological Sciences, P.D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), Changa 388 421, Gujarat, India
| | - Shivani Shah
- Department of Biological Sciences, P.D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), Changa 388 421, Gujarat, India
| | - Nidhi Ruparelia
- Department of Physical Sciences, P.D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), Changa 388 421, Gujarat, India
| | - Bhavtosh A Kikani
- Department of Biological Sciences, P.D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), Changa 388 421, Gujarat, India.
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22
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Paitaid P, H-Kittikun A. Enhancing immobilization of Aspergillus oryzae ST11 lipase on polyacrylonitrile nanofibrous membrane by bovine serum albumin and its application for biodiesel production. Prep Biochem Biotechnol 2020; 51:536-549. [DOI: 10.1080/10826068.2020.1836654] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Pattarapon Paitaid
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Songkhla, Thailand
| | - Aran H-Kittikun
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Songkhla, Thailand
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23
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Kong Z, Hu W, Jiao F, Zhang P, Shen J, Cui B, Wang H, Liang L. Theoretical Evaluation of DNA Genotoxicity of Graphene Quantum Dots: A Combination of Density Functional Theory and Molecular Dynamics Simulations. J Phys Chem B 2020; 124:9335-9342. [PMID: 32870004 DOI: 10.1021/acs.jpcb.0c05882] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Owing to their unique morphology, ultrasmall lateral sizes, and exceptional properties, graphene quantum dots (GQDs) hold great potential in many applications, especially in the fields of electrochemical biosensors, bioimaging, drug delivery, gene delivery, etc. Their biosafety and potential genotoxicity to human and animal cells have been a growing concern in recent years. Especially, the potential DNA damage caused by GQDs is very crucial but still unclear. In this study, the effect of GQDs on DNA damage has been evaluated by a combination of molecular dynamics (MD) simulations and density functional theory. Our results demonstrate that the DNA damaging mechanism of GQDs depends on the size of GQDs. The small GQDs (seven benzene rings) tend to enter into the interior of DNA molecules and cause a DNA base mismatch. The relatively large GQDs (61 benzene rings) tend to adsorb onto the two ends of a DNA molecule and cause DNA unwinding. Due to the strong interaction between guanine (G) and GQDs, the effect of GQDs is much larger on G than on the other three bases (A, C, and T). In addition, the concentration of GQDs could also affect the results of DNA damaging.
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Affiliation(s)
- Zhe Kong
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China.,Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Wei Hu
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
| | - Fangfang Jiao
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
| | - Pengzhen Zhang
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China
| | - Jiawei Shen
- School of Medicine, Hangzhou Normal University, Hangzhou 311121, People's Republic of China
| | - Bo Cui
- Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Hongbo Wang
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China
| | - Lijun Liang
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China.,College of Automation, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China
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24
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Mechanically stable egg white protein based immobilization carrier for β-D-galactosidase: Thermodynamics and application in whey lactose hydrolysis. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104696] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Wang H, Li S, Li J, Zhong L, Cheng H, Ma Q. Immobilized polyphenol oxidase: Preparation, optimization and oxidation of phenolic compounds. Int J Biol Macromol 2020; 160:233-244. [DOI: 10.1016/j.ijbiomac.2020.05.079] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 05/12/2020] [Accepted: 05/12/2020] [Indexed: 02/08/2023]
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26
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Wang J, Huang J, Jiang S, Zhang J, Zhang Q, Ning Y, Fang M, Liu S. Parametric optimization and kinetic study of l-lactic acid production by homologous batch fermentation of Lactobacillus pentosus cells. Biotechnol Appl Biochem 2020; 68:809-822. [PMID: 32738151 DOI: 10.1002/bab.1994] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 06/25/2020] [Indexed: 11/10/2022]
Abstract
Parametric optimization always plays important roles in bioengineering systems to obtain a high product yield under the proper conditions. The parametric conditions of lactic acid production by homologous batch fermentation of Lactobacillus pentosus cells was optimized by the Box-Behnken design. The highest l-lactic acid yield was obtained as 0.836 ± 0.003 g/g glucose with the productivity of 0.906 ± 0.003 g/(L × H) under the optimum conditions of 34.7 °C, pH 6.2, 148 rpm agitation speed, and 9.3 g/L nitrogen source concentration determined by quadratic response surface with high accuracy. The adequate kinetic models of cell growth rate, lactic production rate, and glucose consumption rate were also established to describe the fermentation behavior of L. pentosus cells with the correlation coefficients of 09985, 0.9990, and 0.9989, respectively.
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Affiliation(s)
- Jianfei Wang
- Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, Syracuse, USA
| | - Jiaqi Huang
- Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, Syracuse, USA.,The Center for Biotechnology & Interdisciplinary Studies (CBIS) at Rensselaer Polytechnic Institute, Troy, USA
| | - Shaoming Jiang
- Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, Syracuse, USA
| | - Jing Zhang
- Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, Syracuse, USA
| | - Quanquan Zhang
- Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, Syracuse, USA
| | - Yuchen Ning
- Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, Syracuse, USA
| | - Mudannan Fang
- Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, Syracuse, USA
| | - Shijie Liu
- Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, Syracuse, USA
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27
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Facile preparation of pH-sensitive chitosan microspheres for delivery of curcumin; characterization, drug release kinetics and evaluation of anticancer activity. Int J Biol Macromol 2020; 162:501-511. [PMID: 32574741 DOI: 10.1016/j.ijbiomac.2020.06.183] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/17/2020] [Accepted: 06/18/2020] [Indexed: 12/17/2022]
Abstract
Curcumin (CUR) is a lowly water-soluble natural polyphenol with chemopreventive and chemotherapeutic activities. Hence, to achieve the system with good CUR loading ability, porous MIL-88 (Fe) was prepared in the presence of the presynthesized graphene quantum dots (GQDs) (GQDs@MIL-88 (Fe)). In the following, CUR loaded in the fabricated GQDs@MIL-88 (Fe) nanohybrid. The characterization techniques; Fourier transform infrared (FT-IR), X-ray powder diffraction (XRD), scanning electron microscope (SEM), photoluminescence (PL), and Brunauer-Emmett-Teller (BET) analysis showed success in the synthesis of GQDs@MIL-88 (Fe). Moreover, the FT-IR analysis displayed the loading of CUR and the formation of CUR@GQDs@MIL-88(Fe). Chitosan (CS) was used as a green coating to enhance the biocompatibility of the prepared system (CS/CUR@GQDs@MIL-88(Fe). The fabricated microspheres showed pH-sensitive swelling behavior and released 38.3% of CUR in pH 5.0 which is better fitted with the First-order kinetic model (R2 = 0.9726). In comparison with CUR@GQDs@MIL-88(Fe), the MTT and DAPI assay exhibited less toxic effect for CS/CUR@GQDs@MIL-88(Fe) against MDA-MB 231 cells. Moreover, the safety of the CS/CUR@GQDs@MIL-88(Fe) confirmed after incubation against MCF 10A as a model of the normal cell line. The results conveyed a new concept that the CS/CUR@GQDs@MIL-88(Fe) is a potential candidate for using as a biocompatible carrier with controlled drug delivery ability.
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