1
|
Baghbanbashi M, Shiran HS, Kakkar A, Pazuki G, Ristroph K. Recent advances in drug delivery applications of aqueous two-phase systems. PNAS NEXUS 2024; 3:pgae255. [PMID: 39006476 PMCID: PMC11245733 DOI: 10.1093/pnasnexus/pgae255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Accepted: 06/06/2024] [Indexed: 07/16/2024]
Abstract
Aqueous two-phase systems (ATPSs) are liquid-liquid equilibria between two aqueous phases that usually contain over 70% water content each, which results in a nontoxic organic solvent-free environment for biological compounds and biomolecules. ATPSs have attracted significant interest in applications for formulating carriers (microparticles, nanoparticles, hydrogels, and polymersomes) which can be prepared using the spontaneous phase separation of ATPSs as a driving force, and loaded with a wide range of bioactive materials, including small molecule drugs, proteins, and cells, for delivery applications. This review provides a detailed analysis of various ATPSs, including strategies employed for particle formation, polymerization of droplets in ATPSs, phase-guided block copolymer assemblies, and stimulus-responsive carriers. Processes for loading various bioactive payloads are discussed, and applications of these systems for drug delivery are summarized and discussed.
Collapse
Affiliation(s)
- Mojhdeh Baghbanbashi
- Department of Agricultural and Biological Engineering, Purdue University, 610 Purdue Mall, West Lafayette, IN 47907, USA
| | - Hadi Shaker Shiran
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran 1591634311, Iran
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St West, Montreal, QC H3A 0B8, Canada
| | - Gholamreza Pazuki
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran 1591634311, Iran
| | - Kurt Ristroph
- Department of Agricultural and Biological Engineering, Purdue University, 610 Purdue Mall, West Lafayette, IN 47907, USA
| |
Collapse
|
2
|
Jiang B, Yue H, Fu X, Wang J, Feng Y, Li D, Liu C, Feng Z. One-step high efficiency separation of prolyl endopeptidase from Aspergillus niger and its application. Int J Biol Macromol 2024; 271:132582. [PMID: 38801849 DOI: 10.1016/j.ijbiomac.2024.132582] [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: 12/20/2023] [Revised: 04/25/2024] [Accepted: 05/20/2024] [Indexed: 05/29/2024]
Abstract
Prolyl endopeptidase from Aspergillus niger (An-PEP) is an enzyme that recognizes C-terminal peptide bonds of amino acid chains and cleaves them by hydrolysis. An aqueous two-phase system (ATPS) was used to separate An-PEP from fermentation broth. Through single factor experiments, the ATPS containing 16 % (w/w) PEG2000 and 15 % (w/w) (NH4)2SO4 at pH 6.0 obtained the recovery of 79.74 ± 0.16 % and the purification coefficient of 7.64 ± 0.08. It was then used to produce soy protein isolate peptide (SPIP) by hydrolysis of soy protein isolate (SPI), and SPIP-Ferrous chelate (SPIP-Fe) was prepared with SPIP and Fe2+. The chelation conditions were optimized by RSM, as the chelation time was 30 min, chelation temperature was 25 °C, SPIP mass to VC mass was two to one and pH was 6.0. The obtained chelation rate was 82.56 ± 2.30 %. The change in the structures and functional features of SPIP before and after chelation were investigated. The FTIR and UV-Vis results indicated that the chelation of Fe2+ and SPIP depended mainly on the formation of amide bonds. The fluorescence, SEM and amino acid composition analysis results indicated that Fe2+ could induce and stabilize the surface conformation and change the amino acid distribution on the surfaces of SPIP. The chelation of SPIP and Fe2+ resulted in the enhancement of radical scavenging activities and ACE inhibitory activities. This work provided a new perspective for the further development of peptide-Fe chelates for iron supplement.
Collapse
Affiliation(s)
- Bin Jiang
- Department of Chemistry, Northeast Agricultural University, Harbin 150030, China
| | - Hongshen Yue
- Department of Chemistry, Northeast Agricultural University, Harbin 150030, China
| | - Xinhao Fu
- Department of Chemistry, Northeast Agricultural University, Harbin 150030, China
| | - Jiaming Wang
- Department of Chemistry, Northeast Agricultural University, Harbin 150030, China
| | - Yu Feng
- Department of Chemistry, Northeast Agricultural University, Harbin 150030, China
| | - Dongmei Li
- Department of Chemistry, Northeast Agricultural University, Harbin 150030, China
| | - Chunhong Liu
- Department of Chemistry, Northeast Agricultural University, Harbin 150030, China
| | - Zhibiao Feng
- Department of Chemistry, Northeast Agricultural University, Harbin 150030, China.
| |
Collapse
|
3
|
Almeida TCD, Santos SFDM, Santos ESD. Production of the prolyl endoprotease (PEP) from Aspergillus sp. FSDE 16 by solid-state fermentation (SSF) and use for producing a gluten-free beer. Biotechnol Appl Biochem 2024; 71:460-476. [PMID: 38212282 DOI: 10.1002/bab.2552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 11/10/2023] [Accepted: 12/21/2023] [Indexed: 01/13/2024]
Abstract
Beer is a beverage that contains gluten and cannot be consumed by people with celiac disease. In this context, the enzyme prolyl endoprotease (PEP) can be used to reduce the gluten content in beer. The present study aimed to produce the PEP from Aspergillus sp. FSDE 16 using solid-state fermentation with 5 conditions and comparing with a similar commercial enzyme produced from Aspergillus niger in the production of a gluten-free beer. The results of the performed cultures showed that during the culture, the most increased protease activity (54.46 U/mL) occurred on the 4th day. In contrast, for PEP, the highest activity (0.0356 U/mL) was obtained on the 3rd day of culture in condition. Regarding beer production, cell growth, pH, and total soluble solids showed similar behavior over the 7 days for beers produced without enzyme addition or with the addition of commercial enzyme and with the addition of the enzyme extract produced. The addition of the enzyme and the enzyme extract did not promote changes, and all the beers produced showed similar and satisfactory results, with acid pH between 4 and 5, total soluble solids ranging from 4.80 to 5.05, alcohol content ranging from 2.83% to 3.08%, and all beers having a dark character with deep amber and light copper color. Gluten removal was effectively using the commercial enzyme and the enzyme produced according to condition (v) reaching gluten concentrations equal to 17 ± 5.31 and 21.19 ± 11.28 ppm, respectively. In this way, the production of the enzyme by SSF and its application in the removal of gluten in beer was efficient.
Collapse
Affiliation(s)
- Thaís Cartaxo de Almeida
- Laboratory of Biochemical Engineering, Chemical Engineering Department, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte, Brazil
| | | | - Everaldo Silvino Dos Santos
- Laboratory of Biochemical Engineering, Chemical Engineering Department, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte, Brazil
| |
Collapse
|
4
|
Li D, Zhu L, Wu Q, Chen Y, Wu G, Zhang H. Tartary buckwheat protein-phenol conjugate prepared by alkaline-based environment: Identification of covalent binding sites of phenols and alterations in protein structural and functional characteristics. Int J Biol Macromol 2024; 257:127504. [PMID: 37858650 DOI: 10.1016/j.ijbiomac.2023.127504] [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: 07/04/2023] [Revised: 09/17/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023]
Abstract
Tartary buckwheat protein-rutin/quercetin covalent complex was synthesized in alkaline oxygen-containing environment, and its binding sites, conformational changes and functional properties were evaluated by multispectral technique and proteomics. The determination of total sulfhydryl and free amino groups showed that rutin/quercetin can form a covalent complex with BPI and could significantly reduce the group content. Ultraviolet-visible spectrum analysis showed that protein could form new characteristic peaks after binding with rutin/quercetin. Circular dichroism spectrum analysis showed that rutin and quercetin caused similar changes in the secondary structure of proteins, both promoting β-sheet to α-helix, β-ture and random coil transformation. The fluorescence spectrometry results showed that the combination of phenols can cause the fluorescence quenching, and the combination of rutin was stronger than the quercetin. Proteomics showed that there were multiple covalent binding sites between phenols and protein. Rutin had a high affinity for arginine, and quercetin and cysteine had high affinity. Meanwhile, the combination of rutin/quercetin and protein had reduced the surface hydrophobic ability of the protein, and improved the foaming, stability and antioxidant properties of the protein. This study expounded the mechanism of the combination of BPI and rutin/quercetin, and analysed the differences of the combination of protein and phenols in different structures. The findings can provide a theoretical basis for the development of complexes in the area of food.
Collapse
Affiliation(s)
- Dongze Li
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; National Engineering Research Center for Functional Food, Jiangnan University, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, China
| | - Ling Zhu
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; National Engineering Research Center for Functional Food, Jiangnan University, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, China
| | - Qiming Wu
- Nutrilite Health Institute, Shanghai, China
| | - Yiling Chen
- Amway (China) Botanical R&D Centre, Wuxi 214115, China
| | - Gangcheng Wu
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; National Engineering Research Center for Functional Food, Jiangnan University, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, China
| | - Hui Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; National Engineering Research Center for Functional Food, Jiangnan University, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, China.
| |
Collapse
|
5
|
Liu M, Hu M, Zhou H, Dong Z, Chen X. High-level production of Aspergillus niger prolyl endopeptidase from agricultural residue and its application in beer brewing. Microb Cell Fact 2023; 22:93. [PMID: 37143012 PMCID: PMC10161650 DOI: 10.1186/s12934-023-02087-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/10/2023] [Indexed: 05/06/2023] Open
Abstract
BACKGROUND Prolyl endopeptidase from Aspergillus niger (AN-PEP) is a prominent serine proteinase with various potential applications in the food and pharmaceutical industries. However, the availability of efficient and low-cost AN-PEP remains a challenge owing to its low yield and high fermentation cost. RESULTS Here, AN-PEP was recombinantly expressed in Trichoderma reesei (rAN-PEP) under the control of the cbh1 promoter and its secretion signal. After 4 days of shaking flask cultivation with the model cellulose Avicel PH101 as the sole carbon source, the extracellular prolyl endopeptidase activity reached up to 16.148 U/mL, which is the highest titer reported to date and the secretion of the enzyme is faster in T. reesei than in other eukaryotic expression systems including A. niger and Komagataella phaffii. Most importantly, when cultivated on the low-cost agricultural residue corn cob, the recombinant strain was found to secret a remarkable amount of rAN-PEP (37.125 U/mL) that is twice the activity under the pure cellulose condition. Furthermore, treatment with rAN-PEP during beer brewing lowered the content of gluten below the ELISA kit detection limit (< 10 mg/kg) and thereby, reduced turbidity, which would be beneficial for improving the non-biological stability of beer. CONCLUSION Our research provides a promising approach for industrial production of AN-PEP and other enzymes (proteins) from renewable lignocellulosic biomass, which provides a new idea with relevant researchers for the utilization of agricultural residues.
Collapse
Affiliation(s)
- Minglu Liu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Meng Hu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Hui Zhou
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhiyang Dong
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Xiuzhen Chen
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
| |
Collapse
|
6
|
Intensification of endo-1,4-Xylanase Extraction by Coupling Microextractors and Aqueous Two-Phase System. Processes (Basel) 2023. [DOI: 10.3390/pr11020447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The extraction of xylanase was performed using an aqueous two-phase system (ATPS) based on polyethylene glycol (PEG1540) and various salts. Preliminary studies in a batch extractor showed that the highest extraction efficiency, E = 79.63 ± 5.21%, and purification factor, PF = 1.26 ± 0.25, were obtained with sodium citrate dihydrate-H2O-PEG1540-based ATPS for an extraction time of 10 min. The process was optimized using the experimental Box-Behnken design at three levels with three factors: extraction time (t), xylanase concentration (γ), and mass fraction of PEG in the ATPS (wPEG). Under optimal process conditions (γ = 0.3 mg/mL, wPEG = 0.21 w/w, and t = 15 min), E = 99.13 ± 1.20% and PF = 6.49 ± 0.05 were achieved. In order to intensify the process, the extraction was performed continuously in microextractors at optimal process conditions. The influence of residence time, different feeding strategies, and channel diameter on extraction efficiency and purification factor was further examined. Similar results were obtained in the microextractor for a residence time of τ = 1.03 min (E = 99.59 ± 1.22% and PF = 6.61 ± 0.07) as in the experiment carried out under optimal conditions in the batch extractor. In addition, a batch extractor and a continuous microextractor were used for the extraction of raw xylanase produced by Thermomyces lanuginosus on solid supports.
Collapse
|
7
|
Aqueous biphasic systems as a key tool for food processing. Curr Opin Food Sci 2023. [DOI: 10.1016/j.cofs.2023.100991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
8
|
Brandelli A, Daroit DJ. Unconventional microbial proteases as promising tools for the production of bioactive protein hydrolysates. Crit Rev Food Sci Nutr 2022; 64:4714-4745. [PMID: 36377687 DOI: 10.1080/10408398.2022.2145262] [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] [Indexed: 11/16/2022]
Abstract
Enzymatic hydrolysis is the most prominent strategy to release bioactive peptides from different food proteins and protein-rich by-products. Unconventional microbial proteases (UMPs) have gaining increased attention for such purposes, particularly from the 2010s. In this review, we present and discuss aspects related to UMPs production, and their use to obtain bioactive protein hydrolysates. Antioxidant and anti-hypertensive potentials, commonly evaluated through in vitro testing, are mainly reported. The in vivo bioactivities of protein hydrolysates and peptides produced through UMPs action are highlighted. In addition to bioactivities, enzymatic hydrolysis acts by modulating the functional properties of proteins for potential food uses. The compiled literature indicates that UMPs are promising biocatalysts to generate bioactive protein hydrolysates, adding up to commercially available enzymes. From the recent interest on this topic, continuous and in-depth research is needed to advance toward the applicability and commercial utility of both UMPs and obtained hydrolysates.
Collapse
Affiliation(s)
- Adriano Brandelli
- Laboratório de Bioquímica e Microbiologia Aplicada, Instituto de Ciência e Tecnologia de Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Daniel Joner Daroit
- Programa de Pós-Graduação em Ambiente e Tecnologias Sustentáveis (PPGATS), Universidade Federal da Fronteira Sul (UFFS), Cerro Largo, Brazil
| |
Collapse
|
9
|
Jiang B, Zhong S, Yu H, Chen P, Li B, Li D, Liu C, Feng Z. Covalent and Noncovalent Complexation of Phosvitin and Gallic Acid: Effects on Protein Functionality and In Vitro Digestion Properties. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:11715-11726. [PMID: 36095172 DOI: 10.1021/acs.jafc.2c03990] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
To investigate the effects of different binding modes on the structure, function, and digestive properties of the phosvitin (Pv) and gallic acid (GA) complex, Pv was covalently and noncovalently combined with different concentrations of GA (0.5, 1.5, and 2.5 mM). The structural characterization of the two Pv-GA complexes was performed by Fourier transform infrared, circular dichroism, and LC-MS/MS to investigate the covalent and noncovalent binding of Pv and GA. In addition, the microstructure of the two Pv-GA complexes was investigated by super-resolution microscopy and transmission electron microscopy. The particle size and zeta potential results showed that the addition of GA increased the particle size and the absolute potential of Pv. The determination of protein digestibility, polyphenol content, SH and S-S group levels, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and antioxidant capacity of the digests indicated that noncovalent complexes had greater antioxidant and protective effects on polyphenols. Molecular docking revealed that GA was conjugated with Pv through hydrogen bond interactions.
Collapse
Affiliation(s)
- Bin Jiang
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Shaojing Zhong
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Hongliang Yu
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Peifeng Chen
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Baoyun Li
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Dongmei Li
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Chunhong Liu
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Zhibiao Feng
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| |
Collapse
|
10
|
Shan P, Ho CT, Zhang L, Gao X, Lin H, Xu T, Wang B, Fu J, He R, Zhang Y. Degradation Mechanism of Soybean Protein B 3 Subunit Catalyzed by Prolyl Endopeptidase from Aspergillus niger during Soy Sauce Fermentation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:5869-5878. [PMID: 35511597 DOI: 10.1021/acs.jafc.2c01796] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Soy sauce secondary precipitate formed due to the B3 subunit seriously affects soy sauce's appearance quality. In this study, a prolyl endopeptidase (APE) from Aspergillus niger, which could degrade approximately 50% of the B3 subunit and increase proline content by 24% in soy sauce, was isolated and identified. The results showed that APE was an acidic salt-tolerant serine protease (62 kDa), which was optimally active at 40 °C and pH 4.0, and retained more than 69% activity in 3 M NaCl solution over 10 days. As a potential substrate of APE, the B3 subunit contains 10 proline residues. High salinity could not damage the hydrogen bonds, salt bridges, and interior hydrophobicity of APE; thus, the spatial structures and activity of APE in 3 M NaCl solution were stable within 3 days and decreased thereafter. High salinity made the B3 subunit more rigid and lowered the catalytic activity of APE on the B3 subunit, hindering complete hydrolysis of the B3 subunit. This was the first report about the APE capable of degrading the B3 subunit and reducing the secondary precipitate of soy sauce, providing a new possibility to solve the secondary precipitate of soy sauce.
Collapse
Affiliation(s)
- Pei Shan
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Chi-Tang Ho
- Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901, United States
| | - Lei Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Xianli Gao
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Hong Lin
- Guangdong Meiweixian Flavoring Foods Co., Ltd., 1 Chubang Road, Zhongshan 528437, China
| | - Ting Xu
- Guangdong Meiweixian Flavoring Foods Co., Ltd., 1 Chubang Road, Zhongshan 528437, China
| | - Bo Wang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Jiangyan Fu
- Guangdong Meiweixian Flavoring Foods Co., Ltd., 1 Chubang Road, Zhongshan 528437, China
| | - Ronghai He
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Yaqiong Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| |
Collapse
|
11
|
Hao X, Chen J, Xu M, Zheng H, Li X, Wang M, Liu T. Separation and purification of enveloped and non-enveloped viruses from water samples using an aqueous two-phase system. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.05.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
12
|
Cold Water Immersion Pretreatment of Post-Consuming Particleboards for Wood Chips Recovery by the Hydromechanical Process. JOURNAL OF COMPOSITES SCIENCE 2022. [DOI: 10.3390/jcs6040105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this research work, the effect of 20-day immersion of various types of reclaimed particleboards on thickness swelling and water absorption is investigated. This simple procedure has been chosen as the pretreatment to facilitate the chips’ recovery by the hydromechanical (water jet) method. Maximum swelling was achieved after 20-day immersion but the differences between 10 and 20-day immersion were small, indicating that the time of 10-day immersion can be chosen as the pretreatment time. It was found that the bond between wood chips’ particles was not completely failed since the permanent swelling after immersion and drying was lower than the maximum swelling. Hence, the proposed method needs to be improved by increasing the cross-section areas of particleboard samples after their breaking in order to create irregular pieces and facilitate the water action against the bond of wood particles.
Collapse
|
13
|
Preparation and evaluation of a novel high internal phase Pickering emulsion based on whey protein isolate nanofibrils derived by hydrothermal method. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107180] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
14
|
Silva FL, Pinheiro JC, Leite MJL, Proner MC, da Silva AFV, Freire DMG, Treichel H, Ambrosi A, Di Luccio M. Influence of different PEG/salt aqueous two-phase system on the extraction of 2,3-butanediol. Prep Biochem Biotechnol 2022; 52:1051-1059. [PMID: 35100517 DOI: 10.1080/10826068.2022.2028635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The production of 2,3-butanediol (2,3-BDO), a dialcohol of great interest for the food, chemical, and pharmaceutical industry, through the fermentation of biomass, is a sustainable process strategic position for countries with abundant biomass generated by the agribusiness. However, the downstream process of 2,3-BDO is onerous due to the complexity of fermentation broth and the physical-chemical characteristics of the 2,3-BDO. This study investigated the feasibility of 2,3-BDO extraction from model aqueous solutions using aqueous two-phase systems (ATPS). A central composite rotational design (CCRD) was employed to evaluate different ATPS compositions and the influences on the 2,3-BDO recovery and partition coefficient. The polyethylene glycol (PEG) and different concentrations of sodium citrate, ammonium sulfate, and potassium phosphate were investigated. The concentration of salt and PEG in the ATPS was identified as the most significant factors influencing the recovery and partition coefficient of 2,3-BDO. The recovery of 2,3-BDO reached 94.5% and was obtained when the system was composed of 36.22% (w/w) of PEG 4000 and 4.47% (w/w) of potassium phosphate. The results indicate that ATPS based on PEG-salt has a high potential for industrial application, using mild conditions and a simple process for recovering and purifying the 2,3-BDO produced from microbiological synthesis.
Collapse
Affiliation(s)
- Fabiana Luisa Silva
- Laboratory of Membrane Processes, Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Jádina Carina Pinheiro
- Laboratory of Membrane Processes, Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Monique Juna Lopes Leite
- Laboratory of Membrane Processes, Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Mariane Carolina Proner
- Laboratory of Membrane Processes, Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Anderson Felipe Viana da Silva
- Laboratory of Membrane Processes, Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil
| | | | - Helen Treichel
- Laboratory of Microbiology and Bioprocess, Department of Environmental Science and Technology, Federal University of Fronteira Sul, Erechim, Brazil
| | - Alan Ambrosi
- Laboratory of Membrane Processes, Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Marco Di Luccio
- Laboratory of Membrane Processes, Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil
| |
Collapse
|
15
|
Enriquez-Ochoa D, Meléndez-Martínez D, Aguilar-Yáñez JM, Licona-Cassani C, Mayolo-Deloisa K. Development of aqueous two-phase systems-based approaches for the selective recovery of metalloproteases and phospholipases A 2 toxins from Crotalus molossus nigrescens venom. BIORESOUR BIOPROCESS 2021; 8:136. [PMID: 38650265 PMCID: PMC10992436 DOI: 10.1186/s40643-021-00487-y] [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: 10/05/2021] [Accepted: 12/12/2021] [Indexed: 11/10/2022] Open
Abstract
Snake venoms are rich sources of proteins with potential biotechnological and pharmaceutical applications. Among them, metalloproteases (MPs) and phospholipases A2 (PLA2) are the most abundant. Their isolation involves a multistep chromatographic approach, which has proven to be effective, however implies high operating costs and long processing times. In this study, a cost-effective and simple method based on aqueous two-phase systems (ATPS) was developed to recover MPs and PLA2 from Crotalus molossus nigrescens venom. A system with PEG 400 g mol-1, volume ratio (VR) 1, tie line length (TLL) 25% w/w and pH 7 showed the best performance for PLA2 recovery. In systems with PEG 400 g mol-1, VR 1, TLL 15% w/w, pH 7 and 1 and 3% w/w of NaCl, selective recovery of MP subtype P-III was achieved; whereas, in a system with PEG 400 g mol-1, VR 1, TLL 25% w/w and pH 8.5, MP subtypes P-I and P-III were recovered. Due to their low costs, ethanol-salt systems were also evaluated, however, failed to differentially partition PLA2 and MPs. The use of ATPS could contribute to the simplification and cost reduction of protein isolation processes from snake venoms and other toxin fluids, as well as potentially aid their biochemical, proteomic and biological analyses.
Collapse
Affiliation(s)
- Daniela Enriquez-Ochoa
- Tecnologico de Monterrey, School of Engineering and Sciences, Centro de Biotecnología-FEMSA, Av. Eugenio Garza Sada 2501 Sur, 64849, Monterrey, NL, Mexico
| | - David Meléndez-Martínez
- Tecnologico de Monterrey, School of Engineering and Sciences, Centro de Biotecnología-FEMSA, Av. Eugenio Garza Sada 2501 Sur, 64849, Monterrey, NL, Mexico
| | - José Manuel Aguilar-Yáñez
- Tecnologico de Monterrey, School of Engineering and Sciences, Centro de Biotecnología-FEMSA, Av. Eugenio Garza Sada 2501 Sur, 64849, Monterrey, NL, Mexico
| | - Cuauhtemoc Licona-Cassani
- Tecnologico de Monterrey, School of Engineering and Sciences, Centro de Biotecnología-FEMSA, Av. Eugenio Garza Sada 2501 Sur, 64849, Monterrey, NL, Mexico.
- Tecnologico de Monterrey The Institute for Obesity Research, Av. Eugenio Garza Sada 2501 Sur, 64849, Monterrey, NL, Mexico.
| | - Karla Mayolo-Deloisa
- Tecnologico de Monterrey, School of Engineering and Sciences, Centro de Biotecnología-FEMSA, Av. Eugenio Garza Sada 2501 Sur, 64849, Monterrey, NL, Mexico.
- Tecnologico de Monterrey The Institute for Obesity Research, Av. Eugenio Garza Sada 2501 Sur, 64849, Monterrey, NL, Mexico.
| |
Collapse
|
16
|
Aqueous Two-Phase System–Ion Chromatography for Determination of Thiocyanate in Raw Milk. SEPARATIONS 2021. [DOI: 10.3390/separations8110212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Thiocyanate could effectively inhibit bacteria in milk and extend the shelf life of milk. However, excessive addition will lead to health risks. Therefore, the determination of thiocyanate in raw milk has received a lot of attention, but the determination could be interfered with by other components in raw milk and the pre-treatment of raw milk is complex. In this study, a new pretreatment method combined with ion chromatography (IC) for rapid and sensitive determination of thiocyanate is proposed. An acetonitrile/(NH4)2SO4 aqueous two-phase system (ATPS) was developed for the separation and enrichment of thiocyanate in raw milk. Response surface methodology was performed to optimize the extraction conditions and an efficient pretreatment were obtained using ATPS composed of 42% acetonitrile (w/w) and 16% (NH4)2SO4 (w/w), with the pH 4.7, and the recovery of thiocyanate reached 107.24 ± 0.5%, and the enrichment ratio was 10.74 ± 0.03. IC was used to establish a thiocyanate enrichment method. The linear range was from 0.05 to 15 mg/L and R2 = 0.998, the limit of detection (LOD) was 0.2 μg/L, the limit of quantification (LQD) was 0.6 μg/L. Hence, it is feasible to combine ATPS with IC for the enrichment and determination of thiocyanate in raw milk.
Collapse
|
17
|
Initial Screening of Poly(ethylene glycol) Amino Ligands for Affinity Purification of Plasmid DNA in Aqueous Two-Phase Systems. Life (Basel) 2021; 11:life11111138. [PMID: 34833014 PMCID: PMC8619368 DOI: 10.3390/life11111138] [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] [Received: 09/24/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 12/12/2022] Open
Abstract
Gene therapy and DNA vaccination are among the most expected biotechnological and medical advances for the coming years. However, the lack of cost-effective large-scale production and purification of pharmaceutical-grade plasmid DNA (pDNA) still hampers their wide application. Downstream processing, which is mainly chromatography-based, of pDNA remains the key manufacturing step. Despite its high resolution, the scaling-up of chromatography is usually difficult and presents low capacity, resulting in low yields. Alternative methods that are based on aqueous two-phase systems (ATPSs) have been studied. Although higher yields may be obtained, its selectivity is often low. In this work, modified polymers based on poly(ethylene glycol) (PEG) derivatisation with amino groups (PEG–amine) or conjugation with positively charged amino acids (PEG–lysine, PEG–arginine, and PEG–histidine) were studied to increase the selectivity of PEG–dextran systems towards the partition of a model plasmid. A two-step strategy was employed to obtain suitable pure formulations of pDNA. In the first step, a PEG–dextran system with the addition of the affinity ligand was used with the recovery of the pDNA in the PEG-rich phase. Then, the pDNA was re-extracted to an ammonium-sulphate-rich phase in the second step. After removing the salt, this method yielded a purified preparation of pDNA without RNA and protein contamination.
Collapse
|
18
|
de Oliveira RL, Bernardino MIDS, Silva TBS, Converti A, Porto CS, Porto TS. Extraction and purification of Aspergillus tamarii β-fructofuranosidase with transfructosylating activity using aqueous biphasic systems (PEG/phosphate) and magnetic field. Prep Biochem Biotechnol 2021; 52:478-486. [PMID: 34428129 DOI: 10.1080/10826068.2021.1964085] [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] [Indexed: 10/20/2022]
Abstract
β-fructofuranosidases (FFases) are enzymes involved in sucrose hydrolysis and fructo-oligosaccharides' production which are of great interest for the food industry. FFase from Aspergillus tamarii URM4634 was extracted using PEG/Phosphate Aqueous Biphasic Systems (ABS), and the impact of magnetic field on the extraction behavior was evaluated. A 24-full experimental design was employed to study the influence of molar mass of PEG, concentrations of PEG and phosphate and pH on the selected response variables, i.e., partition coefficient (K), purification factor (PF), activity yield (Y) and selectivity (S). The influence of magnetic field during partition and NaCl concentration on the same responses was also studied. The best results of FFase extraction without magnetic field (K = 0.50, PF = 4.05, Y = 72.66% and S = 0.06) were observed at pH 8.0 using 12.5% (w/w) PEG 400 and 25% (w/w) NaH2PO4/K2HPO4. Application of the magnetic field allowed improving the performance, with the best results being obtained at the longest distance between magnets (lowest magnetic field) and absence of NaCl (K = 0.93, PF = 4.22, Y = 83.79% and S = 0.09). The outcomes obtained demonstrate that ABS combination with low intensity magnetic field can be used as an efficient FFase pre-purification method.
Collapse
Affiliation(s)
| | | | | | - Attilio Converti
- Department Civil, Chemical and Environmental Engineering, University of Genoa, Genoa, Italy
| | | | - Tatiana Souza Porto
- Department of Morphology and Animal Physiology, Federal Rural University of Pernambuco, Recife, Brazil
| |
Collapse
|
19
|
Jiang B, Wang L, Wang M, Wu S, Wang X, Li D, Liu C, Feng Z, Chi Y. Direct separation and purification of α-lactalbumin from cow milk whey by aqueous two-phase flotation of thermo-sensitive polymer/phosphate. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:4173-4182. [PMID: 33420726 DOI: 10.1002/jsfa.11055] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 11/30/2020] [Accepted: 01/08/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND α-lactalbumin (α-La) is of great interest to the industry as a result of its excellent functional properties and nutritional value. Aqueous two-phase flotation (ATPF) of thermo-sensitive polymer poly (ethylene glycol-ran-propylene glycol) monobutyl ether (UCON) and KH2 PO4 was applied to directly separate and purify α-La from milk whey, which was purposed to simplify the production process and reduced cost of production. RESULTS The effect of ATPF composition and operating parameters on the flotation efficiency (E) and purity of α-La were investigated. The optimal conditions included 2 min of premixing time, 30 mL min-1 flow velocity and 20 min of flotation time, whereas the composition conditions comprised 35.0 mL 0.18 g mL-1 phosphate solution (containing 10% (cow milk whey/salt solution, v/v) cow milk whey, 50 ppm defoamer and 2 g NaCl) and 5.0 mL of 40% (w/w) UCON solution. Under the optimal conditions, E of α-La was 95.67 ± 1.04% and purity of α-La was 98.78 ± 1.19%. UCON was recovered by a thermally-induced phase separation and reused in next ATPF process without reducing E of α-La. Purified α-La was characterized by several key technologies. The results indicated that α-La in cow milk whey could be directly separated and purified by the ATPF and the purity was satisfactory. Moreover, it was suggested there was no obvious structure difference between the α-La separated by ATPF and the α-La standard. CONCLUSION The present study enabled the recycling of UCON, providing an effective, economically viable and environmentally friendly approach for the separation and purification of protein. © 2021 Society of Chemical Industry.
Collapse
Affiliation(s)
- Bin Jiang
- Department of Applied Chemistry, Northeast Agricultural University, Harbin, China
| | - Linlin Wang
- Department of Applied Chemistry, Northeast Agricultural University, Harbin, China
| | - Meichan Wang
- Department of Applied Chemistry, Northeast Agricultural University, Harbin, China
| | - Shuang Wu
- Heilongjiang Eco-meteorology Center, Harbin, China
| | - Xiaojing Wang
- Department of Applied Chemistry, Northeast Agricultural University, Harbin, China
| | - Dongmei Li
- Department of Applied Chemistry, Northeast Agricultural University, Harbin, China
| | - Chunhong Liu
- Department of Applied Chemistry, Northeast Agricultural University, Harbin, China
| | - Zhibiao Feng
- Department of Applied Chemistry, Northeast Agricultural University, Harbin, China
| | - Yujie Chi
- College of Food Science, Northeast Agricultural University, Harbin, China
| |
Collapse
|
20
|
Jiao Q, Liu Z, Li B, Tian B, Zhang N, Liu C, Feng Z, Jiang B. Development of Antioxidant and Stable Conjugated Linoleic Acid Pickering Emulsion with Protein Nanofibers by Microwave-Assisted Self-Assembly. Foods 2021; 10:foods10081892. [PMID: 34441669 PMCID: PMC8391289 DOI: 10.3390/foods10081892] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/05/2021] [Accepted: 08/11/2021] [Indexed: 12/26/2022] Open
Abstract
Whey protein isolate nanofibrils (WPNFs) can be used as a novel stabilizer in the Pickering emulsion system to improve the water solubility, stability and bioavailability of lipophilic bioactive ingredients. In this study, conjugated linoleic acid (CLA) and WPNFs were used to prepare a stable Pickering emulsion. We used a transmission electron microscope, low-temperature scanning electron micrographs and other methods to evaluate the micromorphology, surface hydrophobicity and structural units of the obtained WPNFs. Compared with whey protein isolate/CLA Pickering emulsion, the WPNFs/CLA Pickering emulsion has greater ability to remove 2,2-Diphenyl-1-picrylhydrazyl and 2,2′-amino-di(2-ethyl-benzothiazoline sulphonic acid-6) ammonium salt free radicals. Furthermore, the WPNFs/CLA Pickering emulsion has a more stable effect in terms of droplet size and zeta potential over a wider range of ionic strength and temperature conditions. These findings indicate that Pickering emulsion stabilized by WPNFs is more suitable as a carrier of CLA, as it increases the solubility of CLA and has better active applications in biology and food.
Collapse
Affiliation(s)
- Qiyang Jiao
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China; (Q.J.); (Z.L.); (B.L.); (C.L.)
| | - Ziyuan Liu
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China; (Q.J.); (Z.L.); (B.L.); (C.L.)
| | - Baoyun Li
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China; (Q.J.); (Z.L.); (B.L.); (C.L.)
| | - Bo Tian
- College of Food Science, Northeast Agricultural University, Harbin 150030, China;
| | - Ning Zhang
- Key Laboratory of Mineral Resources and Ecological Environment Monitoring, Baoding 071051, China;
| | - Chunhong Liu
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China; (Q.J.); (Z.L.); (B.L.); (C.L.)
| | - Zhibiao Feng
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China; (Q.J.); (Z.L.); (B.L.); (C.L.)
- Correspondence: (Z.F.); (B.J.)
| | - Bin Jiang
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China; (Q.J.); (Z.L.); (B.L.); (C.L.)
- Correspondence: (Z.F.); (B.J.)
| |
Collapse
|
21
|
Separation, structural characteristics and biological activity of lactic acid bacteria exopolysaccharides separated by aqueous two-phase system. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111617] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
22
|
Zannini D, Dal Poggetto G, Malinconico M, Santagata G, Immirzi B. Citrus Pomace Biomass as a Source of Pectin and Lignocellulose Fibers: From Waste to Upgraded Biocomposites for Mulching Applications. Polymers (Basel) 2021; 13:1280. [PMID: 33919976 PMCID: PMC8070950 DOI: 10.3390/polym13081280] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 01/30/2023] Open
Abstract
Citrus pomace derived from the industrial processing of juice and essential oils mostly consists of pectin, cellulose, hemicellulose, and simple sugars. In this work, citrus pomace waste from an agricultural company in South Italy was used as source of pectin. The extraction conditions of the polysaccharide were optimized using a suitable combination of time and a concentration of a mild organic solvent, such as acetic acid; thus recovering high Mw pectin and bioactive molecules (flavonoids and polyphenols). The pectin was structurally (GPC, FTIR), morphologically (SEM), thermally (TGA/DTG), and mechanically characterized, while bioactive molecules were separated and the total phenolic content (TPC) and total flavonoids content (TFC) were evaluated. With the aim to develop novel biocomposite-based materials, the pectin extracted from citrus waste was reinforced with different amounts of lignocellulose fractions also recovered from citrus waste after polysaccharide extraction, according to a "zero waste" circular economy approach. The prepared biocomposites were morphologically and mechanically characterized to be used as biodegradable mulching systems for crop protection. Thus, the citrus waste biomass was recovered, fractionated into its main raw materials, and these were recombined to develop novel upgraded biocomposites for mulching applications, by means of a cost-effective and eco-sustainable approach.
Collapse
Affiliation(s)
| | | | | | | | - Barbara Immirzi
- Institute of Polymers, Composites and Biomaterials, National Research Council, Via Campi Flegrei 34, 80078 Pozzuoli, Italy; (D.Z.); (G.D.P.); (M.M.); (G.S.)
| |
Collapse
|
23
|
Antov P, Krišt’ák L, Réh R, Savov V, Papadopoulos AN. Eco-Friendly Fiberboard Panels from Recycled Fibers Bonded with Calcium Lignosulfonate. Polymers (Basel) 2021; 13:polym13040639. [PMID: 33669944 PMCID: PMC7924858 DOI: 10.3390/polym13040639] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 02/19/2021] [Accepted: 02/19/2021] [Indexed: 01/05/2023] Open
Abstract
The potential of using residual softwood fibers from the pulp and paper industry for producing eco-friendly, zero-formaldehyde fiberboard panels, bonded with calcium lignosulfonate (CLS) as a lignin-based, formaldehyde free adhesive, was investigated in this work. Fiberboard panels were manufactured in the laboratory by applying CLS addition content ranging from 8% to 14% (on the dry fibers). The physical and mechanical properties of the developed composites, i.e., water absorption (WA), thickness swelling (TS), modulus of elasticity (MOE), bending strength (MOR), as well as the free formaldehyde emission, were evaluated according to the European norms. In general, only the composites, developed with 14% CLS content, exhibited MOE and MOR values, comparable with the standard requirements for medium-density fiberboards (MDF) for use in dry conditions. All laboratory-produced composites demonstrated significantly deteriorated moisture-related properties, i.e., WA (24 h) and TS (24 h), which is a major drawback. Noticeably, the fiberboards produced had a close-to-zero formaldehyde content, reaching the super E0 class (≤1.5 mg/100 g), with values, ranging from 0.8 mg/100 g to 1.1 mg/100 g, i.e., equivalent to formaldehyde emission of natural wood. The amount of CLS adhesive had no significant effect on formaldehyde content.
Collapse
Affiliation(s)
- Petar Antov
- Faculty of Forest Industry, University of Forestry, 1797 Sofia, Bulgaria;
- Correspondence: (P.A.); (A.N.P.)
| | - L’uboš Krišt’ák
- Faculty of Wood Sciences and Technology, Technical University in Zvolen, 96001 Zvolen, Slovakia; (L.K.); (R.R.)
| | - Roman Réh
- Faculty of Wood Sciences and Technology, Technical University in Zvolen, 96001 Zvolen, Slovakia; (L.K.); (R.R.)
| | - Viktor Savov
- Faculty of Forest Industry, University of Forestry, 1797 Sofia, Bulgaria;
| | - Antonios N. Papadopoulos
- Laboratory of Wood Chemistry and Technology, Department of Forestry and Natural Environment, International Hellenic University, GR-661 00 Drama, Greece
- Correspondence: (P.A.); (A.N.P.)
| |
Collapse
|
24
|
Ghodake GS, Shinde SK, Saratale GD, Saratale RG, Kim M, Jee SC, Kim DY, Sung JS, Kadam AA. α-Cellulose Fibers of Paper-Waste Origin Surface-Modified with Fe 3O 4 and Thiolated-Chitosan for Efficacious Immobilization of Laccase. Polymers (Basel) 2021; 13:581. [PMID: 33672000 PMCID: PMC7919293 DOI: 10.3390/polym13040581] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/10/2021] [Accepted: 02/11/2021] [Indexed: 02/06/2023] Open
Abstract
The utilization of waste-paper-biomass for extraction of important α-cellulose biopolymer, and modification of extracted α-cellulose for application in enzyme immobilization can be extremely vital for green circular bio-economy. Thus, in this study, α-cellulose fibers were super-magnetized (Fe3O4), grafted with chitosan (CTNs), and thiol (-SH) modified for laccase immobilization. The developed material was characterized by high-resolution transmission electron microscopy (HR-TEM), HR-TEM energy dispersive X-ray spectroscopy (HR-TEM-EDS), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FT-IR) analyses. Laccase immobilized on α-Cellulose-Fe3O4-CTNs (α-Cellulose-Fe3O4-CTNs-Laccase) gave significant activity recovery (99.16%) and laccase loading potential (169.36 mg/g). The α-Cellulose-Fe3O4-CTNs-Laccase displayed excellent stabilities for temperature, pH, and storage time. The α-Cellulose-Fe3O4-CTNs-Laccase applied in repeated cycles shown remarkable consistency of activity retention for 10 cycles. After the 10th cycle, α-Cellulose-Fe3O4-CTNs possessed 80.65% relative activity. Furthermore, α-Cellulose-Fe3O4-CTNs-Laccase shown excellent degradation of pharmaceutical contaminant sulfamethoxazole (SMX). The SMX degradation by α-Cellulose-Fe3O4-CTNs-Laccase was found optimum at incubation time (20 h), pH (3), temperatures (30 °C), and shaking conditions (200 rpm). Finally, α-Cellulose-Fe3O4-CTNs-Laccase gave repeated degradation of SMX. Thus, this study presents a novel, waste-derived, highly capable, and super-magnetic nanocomposite for enzyme immobilization applications.
Collapse
Affiliation(s)
- Gajanan S. Ghodake
- Department of Biological and Environmental Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggido, Seoul 10326, Korea; (G.S.G.); (S.K.S.); (D.-Y.K.)
| | - Surendra K. Shinde
- Department of Biological and Environmental Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggido, Seoul 10326, Korea; (G.S.G.); (S.K.S.); (D.-Y.K.)
| | - Ganesh D. Saratale
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggi-do, Seoul 10326, Korea;
| | - Rijuta G. Saratale
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggi-do, Seoul 10326, Korea;
| | - Min Kim
- Department of Life Science, College of Life Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggido, Seoul 10326, Korea; (M.K.); (S.-C.J.); (J.-S.S.)
| | - Seung-Cheol Jee
- Department of Life Science, College of Life Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggido, Seoul 10326, Korea; (M.K.); (S.-C.J.); (J.-S.S.)
| | - Dae-Young Kim
- Department of Biological and Environmental Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggido, Seoul 10326, Korea; (G.S.G.); (S.K.S.); (D.-Y.K.)
| | - Jung-Suk Sung
- Department of Life Science, College of Life Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggido, Seoul 10326, Korea; (M.K.); (S.-C.J.); (J.-S.S.)
| | - Avinash A. Kadam
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggi-do, Seoul 10326, Korea;
| |
Collapse
|