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Suflet DM, Popescu I, Stanciu MC, Rimbu CM. Antimicrobial Hydrogels Based on Cationic Curdlan Derivatives for Biomedical Applications. Gels 2024; 10:424. [PMID: 39057447 PMCID: PMC11276469 DOI: 10.3390/gels10070424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/20/2024] [Accepted: 06/24/2024] [Indexed: 07/28/2024] Open
Abstract
Hydrogels based on biocompatible polysaccharides with biological activity that can slowly release an active principle at the wound site represent promising alternatives to traditional wound dressing materials. In this respect, new hydrogels based on curdlan derivative with 2-hydroxypropyl dimethyl octyl ammonium groups (QCurd) and native curdlan (Curd) were obtained at room temperature by covalent cross-linking using a diepoxy cross-linking agent. The chemical structure of the QCurd/Curd hydrogels was investigated by Fourier transform infrared spectroscopy (FTIR) spectroscopy. Scanning electron microscopy (SEM) revealed well-defined regulated pores with an average diameter between 50 and 75 μm, and hydrophobic micro-domains of about 5 μm on the pore walls. The high swelling rate (21-24 gwater/ghydrogel) and low elastic modulus values (7-14 kPa) make them ideal for medical applications as wound dressings. To evaluate the possible use of the curdlan-based hydrogels as active dressings, the loading capacity and release kinetics of diclofenac, taken as a model drug, were studied under simulated physiological skin conditions. Several mathematical models have been applied to evaluate drug transport processes and to calculate the diffusion coefficients. The prepared QCurd/Curd hydrogels were found to have good antibacterial properties, showing a bacteriostatic effect after 48 h against S. aureus, MRSA, E. coli, and P. aeruginosa. The retarded drug delivery and antimicrobial properties of the new hydrogels support our hypothesis that they are candidates for the manufacture of wound dressings.
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Affiliation(s)
- Dana M. Suflet
- Petru Poni Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania; (I.P.); (M.-C.S.)
| | - Irina Popescu
- Petru Poni Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania; (I.P.); (M.-C.S.)
| | - Magdalena-Cristina Stanciu
- Petru Poni Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania; (I.P.); (M.-C.S.)
| | - Cristina Mihaela Rimbu
- Faculty of Veterinary Medicine, “Ion Ionescu de la Brad” University of Life Sciences, Mihail Sadoveanu Alley 8, 707027 Iasi, Romania;
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2
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Mao C, Chen Y, Liu T, Ye P, Wang Y, Chen X, Fu H, Wang Y, Wang K. Freezing pre-treatment improves radio frequency explosion puffing (RFEP) quality by altering the cellular structure of purple sweet potato [Ipomoea batatas (L) Lam.]. Food Res Int 2024; 184:114265. [PMID: 38609243 DOI: 10.1016/j.foodres.2024.114265] [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: 12/17/2023] [Revised: 03/16/2024] [Accepted: 03/19/2024] [Indexed: 04/14/2024]
Abstract
Radio frequency explosion puffing (RFEP) is a novel oil-free puffing technique used to produce crispy textured and nutritious puffed snacks. This study aimed to investigate the effects of freezing at different temperatures (-20 °C, -40 °C, -80 °C) for14 h and freezing times (1 and 2 times) on the cellular structure of purple sweet potato and the quality of RFEP chips. The analysis of cell microstructure, conductivity, and rheology revealed that higher freezing temperatures and more freezing times resulted in increased damage to the cellular structure, leading to greater cell membrane permeability and decreased cell wall stiffness. However, excessive damage to cellular structure caused tissue structure to collapse. Compared with the control group (4 °C), the RFEP sample pre-frozen once at -40 °C had a 47.13 % increase in puffing ratio and a 61.93 % increase in crispness, while hardness decreased by 23.44 % (p < 0.05). There was no significant change in anthocyanin retention or color difference. X-ray microtomography demonstrated that the RFEP sample pre-frozen once at -40 °C exhibited a more homogeneous morphology and uniform pore distribution, resulting in the highest overall acceptability. In conclusion, freezing pre-treatment before RFEP can significantly enhance the puffing quality, making this an effective method for preparing oil-free puffing products for fruits and vegetables.
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Affiliation(s)
- Chao Mao
- Northwest A&F University, College of Food Science and Engineering, Yangling, Shanxi 712100, China
| | - Yurui Chen
- Northwest A&F University, College of Food Science and Engineering, Yangling, Shanxi 712100, China
| | - Tong Liu
- Northwest A&F University, College of Food Science and Engineering, Yangling, Shanxi 712100, China
| | - Pengfei Ye
- Northwest A&F University, College of Food Science and Engineering, Yangling, Shanxi 712100, China
| | - Yequn Wang
- Northwest A&F University, College of Food Science and Engineering, Yangling, Shanxi 712100, China
| | - Xiangwei Chen
- Northwest A&F University, College of Food Science and Engineering, Yangling, Shanxi 712100, China
| | - Hongfei Fu
- Northwest A&F University, College of Food Science and Engineering, Yangling, Shanxi 712100, China
| | - Yunyang Wang
- Northwest A&F University, College of Food Science and Engineering, Yangling, Shanxi 712100, China.
| | - Ke Wang
- Northwest A&F University, College of Food Science and Engineering, Yangling, Shanxi 712100, China; School of Food Science, Henan Institute of Science and Technology, 90 Eastern Hualan Avenue, Xinxiang 453003, China.
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3
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Nsengiyumva EM, Heitz MP, Alexandridis P. Carboxymethyl hydroxypropyl guar gum physicochemical properties in dilute aqueous media. Int J Biol Macromol 2024; 262:129775. [PMID: 38423913 DOI: 10.1016/j.ijbiomac.2024.129775] [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: 09/06/2023] [Revised: 01/15/2024] [Accepted: 01/24/2024] [Indexed: 03/02/2024]
Abstract
We investigate carboxymethyl hydroxypropyl guar gum (CMHPG) solution properties in water and NaCl, KCl, and CaCl2 aqueous solutions. The Huggins, Kraemer, and Rao models were applied by fitting specific and relative viscosity of CMHPG/water and CMHPG/salt/water to determine the intrinsic viscosity [η]. The Rao models yielded better results (R2 = 0.779-0.999) than Huggins and Kraemer equations. [η] decreased up to 84% in salt solution over the range 0.9-100 mM compared to water. Salt effects screened the CMHPG charged side groups chains leading to a compacted structure. In 0.9 mM NaCl(aq), the hydrodynamic coil radius (Rcoil) was 28% smaller and 45% smaller in 100 mM NaCl solution relative to water. Similar decreases were seen in KCl and CaCl2 solutions. KCl and CaCl2 were more effective than NaCl. CMHPG is salt-tolerant and shows comparatively less viscosity change than native guar gum, with modest reduced viscosity increases with CMHPG dilution at all salt concentrations. The electrostatic interactions were effective up to 100 mM salt. The activation energy of viscous flow for CMHPG solutions was computed and compared to measured xanthan gum and several literature values. These data show that the barrier to CMHPG flow is higher than for xanthan gum.
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Affiliation(s)
- Emmanuel M Nsengiyumva
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260-4200, USA; Department of Chemistry and Biochemistry, The State University of New York (SUNY) Brockport, Brockport, NY 14420, USA
| | - Mark P Heitz
- Department of Chemistry and Biochemistry, The State University of New York (SUNY) Brockport, Brockport, NY 14420, USA.
| | - Paschalis Alexandridis
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260-4200, USA.
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4
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Nsengiyumva EM, Heitz MP, Alexandridis P. Salt and Temperature Effects on Xanthan Gum Polysaccharide in Aqueous Solutions. Int J Mol Sci 2023; 25:490. [PMID: 38203659 PMCID: PMC10778890 DOI: 10.3390/ijms25010490] [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: 10/31/2023] [Revised: 12/20/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Xanthan gum (XG) is a carbohydrate polymer with anionic properties that is widely used as a rheology modifier in various applications, including foods and petroleum extraction. The aim was to investigate the effect of Na+, K+, and Ca2+ on the physicochemical properties of XG in an aqueous solution as a function of temperature. Huggins, Kraemer, and Rao models were applied to determine intrinsic viscosity, [η], by fitting the relative viscosity (ηrel) or specific viscosity (ηsp) of XG/water and XG/salt/water solutions. With increasing temperature in water, Rao 1 gave [η] the closest to the Huggins and Kraemer values. In water, [η] was more sensitive to temperature increase (~30% increase in [η], 20-50 °C) compared to salt solutions (~15-25% increase). At a constant temperature, salt counterions screened the XG side-chain-charged groups and decreased [η] by up to 60% over 0.05-100 mM salt. Overall, Ca2+ was much more effective than the monovalent cations in screening charge. As the salt valency and concentration increased, the XG coil radius decreased, making evident the effect of shielding the intramolecular and intermolecular XG anionic charge. The reduction in repulsive forces caused XG structural contraction. Further, higher temperatures led to chain expansion that facilitated increased intermolecular interactions, which worked against the salt effect.
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Affiliation(s)
- Emmanuel M. Nsengiyumva
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260, USA;
- Department of Chemistry and Biochemistry, The State University of New York (SUNY) Brockport, Brockport, NY 14420, USA
| | - Mark P. Heitz
- Department of Chemistry and Biochemistry, The State University of New York (SUNY) Brockport, Brockport, NY 14420, USA
| | - Paschalis Alexandridis
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260, USA;
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5
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Qi T, Ren J, Li X, An Q, Zhang N, Jia X, Pan S, Fan G, Zhang Z, Wu K. Structural characteristics and gel properties of pectin from citrus physiological premature fruit drop. Carbohydr Polym 2023; 309:120682. [PMID: 36906363 DOI: 10.1016/j.carbpol.2023.120682] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 02/05/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023]
Abstract
This study is the first to extract and characterize pectin from citrus physiological premature fruit drop. The extraction yield of pectin reached 4.4 % by acid hydrolysis method. The degree of methoxy-esterification (DM) of citrus physiological premature fruit drop pectin (CPDP) was 15.27 %, indicating it was low-methoxylated pectin (LMP). The monosaccharide composition and molar mass test results showed CPDP was a highly branched macromolecular polysaccharide (β: 0.02, Mw: 2.006 × 105 g/mol) with rich rhamnogalacturonan I domain (50.40 %) and long arabinose and galactose side chain (32.02 %). Based on the fact that CPDP is LMP, Ca2+ was used to induce CPDP to form gels. Textural and rheological tests showed that the gel strength and storage modulus of CPDP were higher than commercial citrus pectin (CP) used in this paper due to the lower DM and rich neutral sugar side chains of CPDP. Scanning electron microscope (SEM) results showed CPDP had stable gel network structure.
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Affiliation(s)
- Tingting Qi
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jingnan Ren
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiao Li
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qi An
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Nawei Zhang
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiao Jia
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Siyi Pan
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Gang Fan
- Key Laboratory of Environment Correlative Dietology, Ministry of Education; Hubei Province Key Laboratory of Fruit & Vegetable Processing & Quality Control, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Zhifeng Zhang
- Ningxia Huaxinda Health Technology Co., Ltd., Lingwu 751400, China
| | - Kangning Wu
- Ningxia Huaxinda Health Technology Co., Ltd., Lingwu 751400, China
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6
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Liu Y, Qu W, Feng Y, Ma H. Fine physicochemical, structural, rheological and gelling properties of tomato pectin under infrared peeling technique. INNOV FOOD SCI EMERG 2023. [DOI: 10.1016/j.ifset.2023.103343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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7
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Shi Q, Zou MY, Wang JH, Song MM, Xiong SQ, Liu Y. Ultrasonic effects on molecular weight degradation, physicochemical and rheological properties of pectin extracted from Premna microphylla Turcz. Int J Biol Macromol 2022; 221:1065-1076. [PMID: 36108745 DOI: 10.1016/j.ijbiomac.2022.09.082] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 08/29/2022] [Accepted: 09/08/2022] [Indexed: 11/24/2022]
Abstract
The high molecular weight and poor solubility of pectin extracted from Premna microphylla Turcz (PEP) limits its application. Therefore, in this paper, the degradation effects of PEP under ultrasound irradiation and the influences of ultrasonic on the PEP processing characteristics were investigated. The results indicated that the Mw of PEP decreased significantly with a narrow distribution after ultrasonic treatment. The degradation kinetics of PEP at different ultrasound intensities were sufficiently described by the 2nd-order kinetics eq. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis suggested that ultrasonic treatment destroyed the ordered structure inside the PEP, resulting in a looser microscopic morphology. Compared with the control, the thermal stability of PEP was significantly boosted after ultrasonic treatment. Rheological analysis illustrated that the sonicated PEP presented lower apparent viscosities than the original PEP. While the elasticity and thermal reversibility of the degraded products was enhanced. Ultrasonic treatment prominently weakened its shear thinning fluid behavior and thixotropy, thus improved its processing quality. Therefore, desirable PEP can be prepared by ultrasonic irradiation. The results can provide a reference for the development and application of PEP.
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Affiliation(s)
- Qiang Shi
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Ming-Yue Zou
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Jun-Hui Wang
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China.
| | - Miao-Miao Song
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Shan-Qiang Xiong
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Yong Liu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China.
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8
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Structure, physicochemical characterisation and properties of pectic polysaccharide from Premma puberula pamp. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107550] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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9
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Cai W, Hu T, Cai W, Huang Q. Ultrasound-induced changes in rheological behavior and hydrophobic microdomains of Lignosus rhinocerotis polysaccharide. Int J Biol Macromol 2022; 213:565-573. [PMID: 35660043 DOI: 10.1016/j.ijbiomac.2022.05.182] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/11/2022] [Accepted: 05/28/2022] [Indexed: 11/26/2022]
Abstract
Ultrasound is increasingly applied to modify the structures and physicochemical properties of polysaccharides. Hence, this work investigated the ultrasound-induced changes in the rheological behavior and hydrophobic microdomains of Lignosus rhinocerotis polysaccharide (LRP). With an increase in ultrasonic time, the apparent viscosity, storage modulus, loss modulus, and the final percentage recovery of LRP/water system increased to reach the maximum after 10 min treatment and then decreased. These results indicated that short-term (10 min) ultrasound could increase the strength of the network structure of LRP/water system, while longer-term ultrasound (30 and 60 min) weakened the network structure. The self-healing properties of LRP/water system was not affected by ultrasound treatment according to repeated strain and time sweep data. The critical aggregation concentration of the LRP/water system decreased from 2.5 to 1.8 mg/mL after 10 min ultrasound and the number of hydrophobic microdomains increased, suggesting that ultrasound promoted the hydrophobic aggregation of LRP.
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Affiliation(s)
- Wudan Cai
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Ting Hu
- Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization, Huanggang Normal University, Huanggang 438000, China
| | - Wenfei Cai
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qilin Huang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
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10
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Zhang R, Cheng Z, Ding F, Hua L, Fang Y, Han Z, Shi J, Zou X, Xiao J. Improvements in chitosan-based slurry ice production and its application in precooling and storage of Pampus argenteus. Food Chem 2022; 393:133266. [PMID: 35653987 DOI: 10.1016/j.foodchem.2022.133266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 05/10/2022] [Accepted: 05/18/2022] [Indexed: 11/30/2022]
Abstract
The effects of microbubbles in chitosan-based slurry ice production were investigated, and the efficiency of chitosan-based slurry ice was evaluated for silver pomfret (Pampus argenteus) precooling and storage at 0 °C. Microbubbles generated though agitation accelerated slurry ice production by promoting ice nucleation and eliminating supercooling. Higher bubble counts improved freezing, but overly large bubbles reduced the performance. The rheological properties of chitosan solutions were also investigaed, and solutions with higher viscosity formed more bubbles. Experiments investigating precooling rates, microbial concentrations, pH, thiobarbituric-acid-reactive substances, and total volatile basic nitrogen all confirmed that chitosan-based slurry ice had higher performance than flake ice or conventional slurry ice. Chitosan-based slurry ice can be used for precooling in the fish industry to reduce energy consumption, accelerate precooling, reduce microbial growth, and improve shelf life.
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Affiliation(s)
- Roujia Zhang
- Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Zhiming Cheng
- National Research Center of Pumps and Pumping System Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
| | - Fuyuan Ding
- Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Linhui Hua
- School of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Yunrui Fang
- School of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Zhi Han
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
| | - Jiyong Shi
- Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
| | - Xiaobo Zou
- Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; International Joint Research Laboratory of Intelligent Agriculture and Agri-products Processing (Jiangsu University), Jiangsu Education Department, China.
| | - Jianbo Xiao
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang 212013, China; Department of Analytical Chemistry and Food Science, Faculty of Food Science and Technology, University of Vigo - Ourense Campus, E-32004 Ourense, Spain
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11
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Polysaccharide-based nanoparticles fabricated from oppositely charged curdlan derivatives for curcumin encapsulation. Int J Biol Macromol 2022; 213:923-933. [DOI: 10.1016/j.ijbiomac.2022.05.179] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 12/18/2022]
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12
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Liu J, Yu L, Wang C, Zhang Y, Xi H, Si J, Zhang L, Yan J. Preparation, Structural Features and in vitro Immunostimulatory Activity of a Glucomannan From Fresh Dendrobium catenatum Stems. Front Nutr 2022; 8:823803. [PMID: 35178419 PMCID: PMC8843939 DOI: 10.3389/fnut.2021.823803] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 12/30/2021] [Indexed: 02/02/2023] Open
Abstract
Dendrobium catenatum polysaccharides (DCPs) have attracted attention due to their multiple physiological activities and health benefits. In this study, a novel water-soluble DCP was obtained from fresh D. catenatum stems through three-phase partitioning and ethanol precipitation at room temperature. Its structural characteristics, rheological property, and in vitro immunostimulatory activity were evaluated. Results demonstrated that DCP was a homogenous polysaccharide with a carbohydrate content of 92.75% and a weight-average molecular weight of 2.21 × 105 Da. This polysaccharide is an O-acetylated glucomannan comprised by glucose, mannose, and galacturonic acid in a molar ratio of 30.2:69.5:0.3 and mainly comprises (1→4)-β-D-mannopyranosyl (Manp), 2-O-acetyl-(1→4)-β-D-Manp, (1→6)-α-D-glucopyranosyl (Glcp), and (1→4)-α-D-Glcp residues. DCP exhibits an extended rigid chain in an aqueous solution and favorable steady shear fluid and dynamic viscoelastic behaviors. In vitro immunostimulating assays indicated that DCP activates RAW264.7 cells, thus markedly promoting macrophage proliferation and phagocytosis and increasing the levels of nitric oxide, interferon-γ, interleukin-6, and interleukin-1β. Moreover, the presence of O-acetyl group and high Mw in DCP might be responsible for its potent immunostimulatory activity in vitro. Therefore, our data suggested that DCP could be developed as a promising immunostimulant in functional food and pharmaceutical industries.
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Affiliation(s)
- Jingjing Liu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| | - Luyao Yu
- Department of Pharmaceutical Botany, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Chun Wang
- Key Laboratory of Healthy Food Development and Nutrition Regulation of China National Light Industry, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, China
| | - Yuefan Zhang
- Biomedical Innovation R&D Center, School of Medicine, Shanghai University, Shanghai, China
| | - Hangxian Xi
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| | - Jinping Si
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| | - Lei Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
- Department of Pharmaceutical Botany, School of Pharmacy, Second Military Medical University, Shanghai, China
- Biomedical Innovation R&D Center, School of Medicine, Shanghai University, Shanghai, China
- *Correspondence: Lei Zhang
| | - Jingkun Yan
- Key Laboratory of Healthy Food Development and Nutrition Regulation of China National Light Industry, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, China
- Jingkun Yan ;
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13
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Li G, Wang F, Wang MM, Tang MT, Zhou T, Gu Q. Physicochemical, structural and rheological properties of pectin isolated from citrus canning processing water. Int J Biol Macromol 2022; 195:12-21. [PMID: 34890634 DOI: 10.1016/j.ijbiomac.2021.11.203] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/28/2021] [Accepted: 11/29/2021] [Indexed: 12/27/2022]
Abstract
In order to better utilize the citrus pectin (CP) resource, the crude citrus pectin (CCP), obtained from the citrus fruit canning processing waste water, was purified by cellulose DEAE-52 column, providing neutral polysaccharide CP0 and two acidic polysaccharides (CP1 and CP3). CP1 had the highest yield among the three fractions, being 44.29%. The chemical composition, structure and morphology of these pectin components were analyzed. Monosaccharide composition analysis revealed that arabinose was the most abundant composition in these pectin samples. CCP, CP1 and CP3 were mainly composed of rhamnogalacturonan-I (RG-I) regions. Compared with CP3, CCP and CP1 had longer side chains, which are mainly consisted of arabinose. FT-IR and NMR analysis indicated that α-type glycosidic bonds are the main linkage in the four pectin components. These CP samples were found to possess different conformation, but no triple-helical conformation was observed in all these CP fractions. Scanning electron microscopy revealed that CCP, CP1 and CP3 all had irregular sheet-like structures and partly porous structures. The four pectin components showed the characteristics of non-Newtonian fluids and possessed good viscoelasticity. Due to these properties, the pectin might have potential application in food industry as food thickening agent.
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Affiliation(s)
- Gen Li
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Xiasha, Hangzhou, Zhejiang 310018, PR China
| | - Fan Wang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Xiasha, Hangzhou, Zhejiang 310018, PR China
| | - Miao-Miao Wang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Xiasha, Hangzhou, Zhejiang 310018, PR China
| | - Meng-Ting Tang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Xiasha, Hangzhou, Zhejiang 310018, PR China
| | - Tao Zhou
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Xiasha, Hangzhou, Zhejiang 310018, PR China.
| | - Qing Gu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Xiasha, Hangzhou, Zhejiang 310018, PR China.
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14
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Hydrodynamic alignment and self-assembly of cationic lignin polymers made of architecturally altered monomers. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Chaudhari V, Buttar HS, Bagwe-Parab S, Tuli HS, Vora A, Kaur G. Therapeutic and Industrial Applications of Curdlan With Overview on Its Recent Patents. Front Nutr 2021; 8:646988. [PMID: 34262922 PMCID: PMC8273257 DOI: 10.3389/fnut.2021.646988] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 05/27/2021] [Indexed: 01/01/2023] Open
Abstract
Curdlan is an exopolysaccharide, which is composed of glucose linked with β-(1,3)-glycosidic bond and is produced by bacteria, such as Alcaligenes spp., Agrobacterium spp., Paenibacillus spp., Rhizobium spp., Saccharomyces cerevisiae, Candida spp., and fungal sources like Aureobasidium pullulan, Poria cocos, etc. Curdlan has been utilized in the food and pharmaceutical industries for its prebiotic, viscosifying, and water-holding properties for decades. Recently, the usefulness of curdlan has been further explored by the pharmaceutical industry for its potential therapeutic applications. Curdlan has exhibited immunoregulatory and antitumor activity in preclinical settings. It was observed that curdlan can prevent the proliferation of malarial merozoites in vivo; therefore, it may be considered as a promising therapy for the treatment of end-stage malaria. In addition, curdlan has demonstrated potent antiviral effects against human immunodeficiency virus (HIV) and Aedes aegypti virus. It has been suggested that the virucidal properties of curdlans should be extended further for other deadly viruses, such as severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS), and the current severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2/COVID-19). The prebiotic property of curdlan would confer beneficial effects on the host by promoting the growth of healthy microbiota in the gut and consequently help to reduce gastrointestinal disorders. Therefore, curdlan can be employed in the manufacture of prebiotics for the management of various gastrointestinal dysbiosis problems. Studies on the mechanism of action of curdlan-induced suppression in microbial and tumor cells at the cellular and molecular levels would not only enhance our understanding regarding the therapeutic effectiveness of curdlan but also help in the discovery of new drugs and dietary supplements. The primary focus of this review is to highlight the therapeutic interventions of curdlan as an anticancer, anti-malaria, antiviral, and antibacterial agent in humans. In addition, our review provides the latest information about the chemistry and biosynthesis of curdlan and its applications for making novel dairy products, functional foods, and nutraceuticals and also details about the recent patents of curdlan and its derivatives.
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Affiliation(s)
- Vinay Chaudhari
- Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, Shri Vile Parle Kelavani Mandal's Narsee Monjee Institute of Management Studies, Mumbai, India
| | - Harpal Singh Buttar
- Department of Pathology and Laboratory Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Siddhi Bagwe-Parab
- Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, Shri Vile Parle Kelavani Mandal's Narsee Monjee Institute of Management Studies, Mumbai, India
| | - Hardeep Singh Tuli
- Department of Biotechnology, Maharishi Markandeshwar (Deemed to be University), Mullana, India
| | - Amisha Vora
- Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, Shri Vile Parle Kelavani Mandal's Narsee Monjee Institute of Management Studies, Mumbai, India
| | - Ginpreet Kaur
- Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, Shri Vile Parle Kelavani Mandal's Narsee Monjee Institute of Management Studies, Mumbai, India
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16
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Conformational and rheological properties of bacterial cellulose sulfate. Int J Biol Macromol 2021; 183:2326-2336. [PMID: 34089760 DOI: 10.1016/j.ijbiomac.2021.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/21/2021] [Accepted: 06/01/2021] [Indexed: 11/22/2022]
Abstract
In this study, a water-soluble bacterial cellulose sulfate (BCS) was prepared with sulfur trioxide pyridine complex (SO3· Py) in a lithium chloride (LiCl)/dimethylacetamide (DMAc) homogeneous solution system using bacterial cellulose (BC). The structural study showed that the value for the degrees of substitution of BCS was 1.23. After modification, the C-6 hydroxyl group of BC was completely substituted and the C-2 and C-3 hydroxyl groups were partially substituted. In an aqueous solution, the BCS existed as a linear polymer with irregular coil conformation, which was consistent with the findings observed using atomic force microscopy. The steady-state shear flow and dynamic viscoelasticity were systematically determined over a range of BCS concentrations (1 %-4 %, w/v) and temperature (5 °C-50 °C). Steady-state flow experiments revealed that BCS exhibited shear thinning behavior, which increased with an increase in concentration and a decrease in temperature. These observations were quantitatively demonstrated using the cross model. Moreover, based on the dynamical viscoelastic properties, we confirmed that BCS was a temperature-sensitive and weak elastic gel, which was somewhere between a dilute solution and an elastic gel. Therefore, considering the special synthetic strategy and rheological behavior, BCS might be used as a renewable material in the field of biological tissue engineering, especially in the manufacture of injectable hydrogels, cell scaffolds, and as a drug carrier.
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Chen ZL, Wang C, Ma H, Ma Y, Yan JK. Physicochemical and functional characteristics of polysaccharides from okra extracted by using ultrasound at different frequencies. Food Chem 2021; 361:130138. [PMID: 34062454 DOI: 10.1016/j.foodchem.2021.130138] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 05/07/2021] [Accepted: 05/16/2021] [Indexed: 11/27/2022]
Abstract
In this study, single- (SFU) and dual-frequency (DFU) ultrasounds were used to extract polysaccharides from okra (Abelmoschus esculentus (L.) Moench) pods (OPSs), and the physicochemical characteristics, functional properties, and in vitro biological activities of the OPSs were comparatively evaluated. Results showed that ultrasonic extractions at different frequencies led to remarkable variations in extraction yields, chemical components, monosaccharide compositions, molecular weights (MWs), surface morphologies, and rheological properties of the OPSs but hardly affected their preliminary structural features and thermal stabilities. The OPS obtained through DFU at 40/60 kHz with the lowest MWs (0.85-14.93 × 105 Da) and highest polyphenol content (7.38%) as well as loosest network structures showed superior antioxidant, cholesterol absorption and nitrite ion absorption capacities than the other OPSs, and the OPS extracted through SFU at 20 kHz with the highest carboxylate content (76.08%), MWs (7.28-32.83 × 105 Da) and degree of esterification (30.7%) exhibited higher bile acid-binding capacity than the other OPSs.
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Affiliation(s)
- Zhi-Ling Chen
- School of Food & Biological Engineering, Institute of Food Physical Processing, Jiangsu University, Zhenjiang 212013, China; Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210018, China
| | - Chun Wang
- School of Food & Biological Engineering, Institute of Food Physical Processing, Jiangsu University, Zhenjiang 212013, China
| | - Haile Ma
- School of Food & Biological Engineering, Institute of Food Physical Processing, Jiangsu University, Zhenjiang 212013, China
| | - Yanhong Ma
- Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210018, China
| | - Jing-Kun Yan
- School of Food & Biological Engineering, Institute of Food Physical Processing, Jiangsu University, Zhenjiang 212013, China.
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18
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Cai W, Hu T, Huang Q. A polysaccharide from Lignosus rhinocerotis sclerotia: Self-healing properties and the effect of temperature on its rheological behavior. Carbohydr Polym 2021; 267:118223. [PMID: 34119176 DOI: 10.1016/j.carbpol.2021.118223] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 05/06/2021] [Accepted: 05/15/2021] [Indexed: 12/19/2022]
Abstract
This work investigated the self-healing properties of Lignosus rhinocerotis polysaccharide (LRP) and the effect of temperature on its rheological behavior. Dynamic sweep tests (strain sweep, frequency sweep, and time sweep) showed that the LRP/water system possessed self-healing properties due to the entangled network formed by hyperbranched LRP molecular chains. The flow activation energy of LRP solution calculated by Arrhenius equation was shown to decrease with increasing LRP concentration, indicating that LRP solution at higher concentration was less sensitive to temperature. Temperature ramp test exhibited that LRP had a glass transition temperature (Tg) determined as 49.35 °C and the temperature effect was irreversible. Microrheological test revealed that the LRP aqueous solution can form a gel at room temperature with the concentration ≥ 20 mg/mL. This work provided a theoretical basis for the development of LRP-based self-healing materials and facilitated a deep understanding of the temperature effect on rheological behavior of LRP.
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Affiliation(s)
- Wudan Cai
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China
| | - Ting Hu
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; College of Biology and Agricultural Resources, Huanggang Normal College, Huanggang 438000, China
| | - Qilin Huang
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China.
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19
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Wang L, Li P, Ren Y, Bai F, Wang J, Zhang Y, Jin W, El-Seedi H, Gao R. A novel extraction approach and unique physicochemical properties of gelatin from the swim bladder of sturgeon. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:2912-2919. [PMID: 33155672 DOI: 10.1002/jsfa.10923] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/19/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Gelatin is traditionally produced from mammals and widely applied in the food industry. The production is tedious, time-consuming and environment-unfriendly, while the application is restricted because of zoonosis risk and religious sentiment. RESULTS Gelatin was extracted by hot water from sturgeon swim bladder after defatting with alcohol and hexane. The yield reached to 94.15% under the optimized conditions of 50 °C, 30 min and 10 mL g-1 . Its amino acid and subunit profiles were similar to type I collagen. Compared to commercial porcine, bovine and piscine gelatins, it exhibited higher whiteness (3.38), emulsion activity (171.76 m2 g-1 ), gel strength (853.23 g), water-holding capacity (92.37%) and viscoelasticity (0.03). But the transmittance (40.56% at 450 nm and 59.07% at 620 nm), emulsion stability (30.09 min), foam expansion (203.00) and stability (26.92), gelling (16.88 °C) and melting temperature (21.80 °C) were lower. While the pH (6.87) and viscosity (28.60 mPa s) were moderate. Moreover, it made better hydrogels and nanofibers. CONCLUSION Gelatin was extracted from sturgeon swim bladder using a clean and efficient approach, and exhibited unique properties and great potential for the food industry. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Lin Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Peiyu Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Yuhan Ren
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Fan Bai
- Quzhou Xunlong Aquatic Products Sci-tech Development Co., Ltd., Quzhou, China
| | - Jinlin Wang
- Quzhou Xunlong Aquatic Products Sci-tech Development Co., Ltd., Quzhou, China
| | - Yuhao Zhang
- College of Food Science, Southwest University, Chongqing, China
| | - Wengang Jin
- Bio-resources Key Laboratory of Shaanxi Province, School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, China
| | - Hesham El-Seedi
- Pharmacognosy Group, Department of Medicinal Chemistry, Uppsala University, Biomedical Center, Uppsala, Sweden
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang, China
| | - Ruichang Gao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Bio-resources Key Laboratory of Shaanxi Province, School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, China
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20
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Chen TT, Zhang ZH, Wang ZW, Chen ZL, Ma H, Yan JK. Effects of ultrasound modification at different frequency modes on physicochemical, structural, functional, and biological properties of citrus pectin. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106484] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Construction and characterization of antioxidative ferulic acid-grafted carboxylic curdlan conjugates and their contributions on β-carotene storage stability. Food Chem 2021; 349:129166. [PMID: 33550019 DOI: 10.1016/j.foodchem.2021.129166] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 01/18/2021] [Accepted: 01/19/2021] [Indexed: 11/22/2022]
Abstract
Grafting copolymerization of phenolic acids onto polysaccharides is an important strategy to improve their biological activities. In this study, ferulic acid (FA)-grafted carboxylic curdlan conjugates, namely, Cur-8-g-FA, Cur-24-g-FA, and Cur-48-g-FA, were synthesized by free radical-induced grafting. Results showed that FA was covalently grafted onto carboxylic curdlans via ester bonds. The grafting ratios of Cur-8-g-FA, Cur-24-g-FA, and Cur-48-g-FA were 223.03 ± 12.63, 115.63 ± 5.96, and 152.30 ± 4.57 mg FA/g, respectively, which were related with the carboxylate contents, molecular weights, and chain conformations of carboxylic curdlans. Compared with carboxylic curdlans, the FA-grafted carboxylic curdlan conjugates had lower thermal stability, molecular weight, and rheological property and looser surface morphology but had more prominent antioxidant benefits in vitro, which were proportional to their grafting ratios. Moreover, good storage stability against chemical degradation was exhibited by the β-carotene in Pickering emulsions stabilized by Cur-8-g-FA with a high grafting ratio and molecular weight.
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22
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Wang C, Cai WD, Yao J, Wu LX, Li L, Zhu J, Yan JK. Conjugation of ferulic acid onto pectin affected the physicochemical, functional and antioxidant properties. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:5352-5362. [PMID: 32542712 DOI: 10.1002/jsfa.10583] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 06/03/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Pectin, as a functional ingredient, is best known as a gelling and thickening agent, stabilizer, and fat substitute in processed foods. The synthesis of pectin graft copolymers is considered one of the most fascinating ways to improve its physicochemical and functional properties. In this study, therefore, water-soluble pectin or ultrasound-treated pectins (UP30 and UP60) grafted with ferulic acid (FA) conjugates, pectin-g-FA, UP30-g-FA and UP60-g-FA, were synthesized via a free radical-mediated grafting procedure, and their physicochemical, structural, and functional characteristics were investigated. Moreover, 2,2-diphenyl-1-picryl-hydrazyl (DPPH)-radical scavenging activity, Trolox equivalent antioxidant capacity (TEAC) assay and ferric-reducing ability of plasma (FRAP) assay were used to evaluate their antioxidant activities in vitro. RESULTS Results showed that FA was covalently grafted onto pectin or ultrasound-treated pectins, and the grafting ratios of pectin-g-FA, UP30-g-FA and UP60-g-FA were 65.43 ± 1.30, 82.55 ± 1.71 and 75.82 ± 0.89 mg FA/g, respectively. Although the molecular weights, apparent viscosities, and thermal stabilities of the three FA-grafted pectin conjugates decreased and their surface morphologies were different from those of native pectin and ultrasound-treated pectins, they possessed prominent DPPH-radical scavenging ability [half maximal inhibitory concentration (IC50 ) of 0.32 to 0.89 mg mL-1 ) and antioxidant capacity (TEAC of 100.02 to 153.42 μmol Trolox/g sample; FRAP: 166.41 to 270.27 μmol FeSO4 /g sample). Their antioxidant potentials were positively correlated with the grafting ratio. CONCLUSION This study provided a promising strategy for the functionalization of pectin, and the prepared FA-grafted pectin conjugates could be explored as functional ingredients that showed potential for applications in food and agriculture systems. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Chun Wang
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Wu-Dan Cai
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Jing Yao
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Li-Xia Wu
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Lin Li
- Engineering Research Center of Health Food Design & Nutrition Regulation, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, China
| | - Jie Zhu
- Engineering Research Center of Health Food Design & Nutrition Regulation, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, China
| | - Jing-Kun Yan
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, China
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23
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Yan JK, Wang C, Qiu WY, Chen TT, Yang Y, Wang WH, Zhang HN. Ultrasonic treatment at different pH values affects the macromolecular, structural, and rheological characteristics of citrus pectin. Food Chem 2020; 341:128216. [PMID: 33032253 DOI: 10.1016/j.foodchem.2020.128216] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 08/10/2020] [Accepted: 09/23/2020] [Indexed: 01/06/2023]
Abstract
Ultrasonic degradation has become a promising strategy for producing modified pectin (MP). In this study, the impact of ultrasonic treatment at various pH values (4.0, 7.0, and 10.0) on the macromolecular, structural and rheological characteristics of citrus pectin was investigated. Results demonstrated that ultrasonic irradiation at the higher pH led to larger reductions in the intrinsic viscosity and weight-average molecular weight of pectin. The degradation kinetics of pectin at different pH values under ultrasound well fitted to a second-order reaction kinetics model. Acoustic cavitation, β-elimination, and demethylation led to the breakage of glycosidic linkages of side chains and methoxyl groups of pectin, but did not have noticeable influences on the main chain of pectin. The ultrasonic treatment at a high pH led to an apparent change in the rheological characteristics of pectin. Therefore, ultrasonic treatment at various pH values can be developed as a viable means to prepare desirable MP.
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Affiliation(s)
- Jing-Kun Yan
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Chun Wang
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Wen-Yi Qiu
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Ting-Ting Chen
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yan Yang
- National Engineering Research Center of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, China; Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Wen-Han Wang
- National Engineering Research Center of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, China; Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - He-Nan Zhang
- National Engineering Research Center of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, China; Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China.
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24
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Effects of structural and conformational characteristics of citrus pectin on its functional properties. Food Chem 2020; 339:128064. [PMID: 32950902 DOI: 10.1016/j.foodchem.2020.128064] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 09/02/2020] [Accepted: 09/08/2020] [Indexed: 12/17/2022]
Abstract
Ultrasonic degradation has become a fascinating strategy for preparing modified pectin, contributing to the improvement of pectin's functional characteristics. In this study, the impacts of structural and conformational characteristics of original and ultrasound-treated citrus pectins on their functional properties were examined. The results showed that compared with ultrasound-treated pectins, untreated pectin presented higher rheological and gelling properties primarily attributed to its larger weight-average molecular weight (Mw), degree of methoxylation, amount of neutral sugar side chains, and z-average radius of gyration, as well as the more extended flexible-chain conformation. However, the ultrasound-treated pectins had better emulsifying properties than untreated pectin in an oil-in-water emulsion system. These properties, visually suggested by morphology analysis, including enhanced emulsifying capacity, emulsifying stability, reduced mean droplet size and negatively charged zeta potential. Moreover, the Mw and chain conformation of untreated and ultrasound-treated pectins played more decisive roles in their functional properties than the others.
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25
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Yan JK, Cai WD, Wang C, Yu YB, Zhang HN, Yang Y, Wang WH. Macromolecular behavior, structural characteristics and rheological properties of alkali-neutralization curdlan at different concentrations. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105785] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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26
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Wang C, Yu YB, Chen TT, Wang ZW, Yan JK. Innovative preparation, physicochemical characteristics and functional properties of bioactive polysaccharides from fresh okra (Abelmoschus esculentus (L.) Moench). Food Chem 2020; 320:126647. [DOI: 10.1016/j.foodchem.2020.126647] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 03/18/2020] [Accepted: 03/18/2020] [Indexed: 10/24/2022]
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27
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Wang Y, Xiao F, Jin G. Structural basis of quinolone derivatives, inhibition of type I and II topoisomerases and inquiry into the relevance of bioactivity in odd or even branches with molecular docking study. J Mol Struct 2020; 1221:128869. [PMID: 32834112 PMCID: PMC7347330 DOI: 10.1016/j.molstruc.2020.128869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 12/11/2022]
Abstract
The structural modification of quinolone derivatives has been a hot spot in recent years, especially the modification of the N-1 position, which is the part that this article focuses on. In this paper, series of synthesized quinoline quaternary ammonium salts with odd and even carbon number alkyl groups in N-1 position were used to explain the influence of the alkyl side chain on activity. With respect to all the recently synthesized twenty products, the biological activity results exhibited significant antitumor and antibacterial activity with obvious differences in the target alkyliodine substituted compounds and the antibacterial activities apparently had the prominent odd-carbon number predominance. Compound 8-((4-(benzyloxy)phenyl)amino)-7-(ethoxycarbonyl)-5-propyl-[1,3]dioxolo[4,5-g]quinolin-5-ium (4d) was found to be the most potent derivative with IC50 values of 4 ± 0.88, 4 ± 0.42, 14±1.96, and 32±3.66 against A-549, Hela, SGC-7901, and L-02 cells, respectively, stronger than the positive control 5-FU and MTX. Furthermore, it had the most potent bacterial inhibitory activity of MIC value against E. coli (ATCC 29213) and Staphylococcus aureus (ATCC 8739) at 3.125 nmol mL−1. With respect to molecular simulations, in order to illustrate the possible mechanism of the difference between the series of compounds in the even or odd carbon chain alkyliodine substitution, this paper simulated the conceivable mode and explained the main interactions. Finally, we could find that the position and proportion of hydrogen bonds and other interactions in each series were regarded as the main reasons for this difference in activity.
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Affiliation(s)
- Yilin Wang
- The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, Zhenjiang, 212300, PR China
| | - Fuyan Xiao
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Guofan Jin
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
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28
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Jia RB, Li ZR, Wu J, Ou ZR, Zhu Q, Sun B, Lin L, Zhao M. Physicochemical properties of polysaccharide fractions from Sargassum fusiforme and their hypoglycemic and hypolipidemic activities in type 2 diabetic rats. Int J Biol Macromol 2020; 147:428-438. [PMID: 31899245 DOI: 10.1016/j.ijbiomac.2019.12.243] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 12/16/2019] [Accepted: 12/27/2019] [Indexed: 12/16/2022]
Abstract
Two polysaccharide fractions (SFPs, designated as respectively SFP-1 and SFP-2) were acquired from Sargassum fusiforme by ultrasound-assisted enzymatic extraction, and their physicochemical properties and hypoglycemic and hypolipidemic effects were investigated. Structural analysis indicated that SFPs were obvious different in the zeta potential, molecular weight distribution, characteristic organic group, microstructure and the contents of total sugar, uronic acid, sulfate and moisture. SFPs consisted of fucose, mannose, rhamnose, glucose, galactose and glucuronic acid with different molar ratios. Congo red test explained that SFPs had no triple-helix structure. SFP-1 exhibited lower viscosity due to its lower molecular weight. Regarding to hypoglycemic and hypolipidemic effects, oral administration of SFPs prominently restrained loss of body weight and increase of water intake, and also significantly controlled the increase of levels of fasting blood glucose, triglyceride (TG), total cholesterol (TC), low density lipoprotein cholesterol (LDL-C), uric acid (UA), urea nitrogen (BUN), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) of diabetic rats, and SFP-2 showed better effects in controlling fasting blood glucose, ALT, UA and BUN levels. Intervention of SFP-2 reduced the levels of insulin, FFA and TBA of diabetic rats. Histomorphological observation further demonstrated that SFPs could attenuate liver and kidney damage caused by hyperglycemia and hyperlipidemia. Data indicated that SFPs, especially SFP-2, significantly improved hyperglycemia, hyperlipidemia and liver and kidney function of diabetic rats.
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Affiliation(s)
- Rui-Bo Jia
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China
| | - Zhao-Rong Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China
| | - Juan Wu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China
| | - Zhi-Rong Ou
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Qiyuan Zhu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China
| | - Baoguo Sun
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China
| | - Lianzhu Lin
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China.
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510640, China.
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29
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Chemistry and microbial sources of curdlan with potential application and safety regulations as prebiotic in food and health. Food Res Int 2020; 133:109136. [PMID: 32466929 DOI: 10.1016/j.foodres.2020.109136] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 02/28/2020] [Accepted: 02/29/2020] [Indexed: 12/24/2022]
Abstract
Curdlan - a homopolysaccharide is comprised of glucose using β-1,3-glycosidic bond and produced by different types of microorganisms as exopolysaccharide. Curdlan gel is stable during freezing and thawing processes which find several applications in food and pharmaceutical industries. It acts as a prebiotic, stabilizer and water-holding, viscosifying and texturing agent. Additionally, curdlan gel is used as a food factor to develop the new products e.g. milk fat substitute, non-fat whipped cream, retorting (freeze-drying) process of Tofu, low-fat sausage, and low-fat hamburger. However, a great variation exists among different countries regarding the regulatory aspects of curdlan as food additives, dietary components or prebiotic substances. Therefore, the present review paper aims to discuss safety issues and the establishment of common guidelines and legislation globally, focusing on the use the applications of curdlan in the food sector including the development of noodles, meat-based products, and fat-free dairy products. This review analyzes and describes in detail the potential of curdlan as a sustainable alternative additive in health and food industries, emphasizing on the chemical composition, production, properties, and potential applications.
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Cai WD, Zhu J, Wu LX, Qiao ZR, Li L, Yan JK. Preparation, characterization, rheological and antioxidant properties of ferulic acid-grafted curdlan conjugates. Food Chem 2019; 300:125221. [DOI: 10.1016/j.foodchem.2019.125221] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 07/17/2019] [Accepted: 07/21/2019] [Indexed: 12/15/2022]
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Ye J, Hua X, Zhao Q, Zhao W, Chu G, Zhang W, Yang R. Chain conformation and rheological properties of an acid-extracted polysaccharide from peanut sediment of aqueous extraction process. Carbohydr Polym 2019; 228:115410. [PMID: 31635751 DOI: 10.1016/j.carbpol.2019.115410] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 09/21/2019] [Accepted: 09/29/2019] [Indexed: 12/20/2022]
Abstract
A polysaccharide (PPS) in peanut sediment of aqueous extraction process was obtained at pH4.0, purified via anion-exchange chromatography. The composition, chain conformation and rheological properties were investigated. PPS mainly consisted of arabinose, galacturonic acid, xylose, and rhamnose. The intrinsic viscosity [η] was 0.71 dL/g in 0.1 M NaNO3 solution. The weight-average molar mass Mw and polydispersity index were 3.77 × 105 g/mol and 1.25, suggesting high homogeneity. The average radius of gyration (Rg), hydrodynamic radius (Rh), Rg/Rh ratio and conformation parameter v were 25.5, 18.2, 1.40 and 0.21, respectively, indicating compact coil chain conformation with branched structure. Molecular morphology revealed that PPS displayed chain shape comprised of spheres with a diameter range of 15-50 nm and apparent length of chains mainly ranged from 100 to 300 nm. The aggregation caused by molecular self-association enhanced with concentration increasing. Additionally, Newtonian behavior was observed at various concentrations. Increase in temperature effectively broke this behavior. 10.0 wt.% PPS possessed activation energy of 21.7 KJ/mol, was structured liquid and almost fitted Cox-Merz rule. These closely related with its conformation and molecular self-association behavior.
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Affiliation(s)
- Jianfen Ye
- State Key Laboratory of Food Science & Technology, School of Food Science and Technology, Jiangnan University, 214122, Wuxi, China
| | - Xiao Hua
- State Key Laboratory of Food Science & Technology, School of Food Science and Technology, Jiangnan University, 214122, Wuxi, China
| | - Qiyan Zhao
- State Key Laboratory of Food Science & Technology, School of Food Science and Technology, Jiangnan University, 214122, Wuxi, China
| | - Wei Zhao
- State Key Laboratory of Food Science & Technology, School of Food Science and Technology, Jiangnan University, 214122, Wuxi, China
| | - Guanhe Chu
- State Key Laboratory of Food Science & Technology, School of Food Science and Technology, Jiangnan University, 214122, Wuxi, China
| | - Wenbin Zhang
- State Key Laboratory of Food Science & Technology, School of Food Science and Technology, Jiangnan University, 214122, Wuxi, China
| | - Ruijin Yang
- State Key Laboratory of Food Science & Technology, School of Food Science and Technology, Jiangnan University, 214122, Wuxi, China.
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Yan JK, Wu LX, Cai WD, Xiao GS, Duan Y, Zhang H. Subcritical water extraction-based methods affect the physicochemical and functional properties of soluble dietary fibers from wheat bran. Food Chem 2019; 298:124987. [PMID: 31260962 DOI: 10.1016/j.foodchem.2019.124987] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 06/04/2019] [Accepted: 06/10/2019] [Indexed: 01/20/2023]
Abstract
In this study, subcritical water extraction (SWE), SWE in aqueous citric acid (pH 5.0) (SWEC), and ultrasound-assisted SWEC (USWEC) were used to extract soluble dietary fiber (SDF) from wheat bran. Results showed that SWE-based methods significantly influenced the physicochemical, functional, and biological properties of the SDF. The fraction SDF-III attained via USWEC had higher SDF yield (46.30%) and carbohydrate content (82.91%), and lower weight-average molecular weight (65.2 kDa) and particle size (1.17 μm), and looser and more porous surface structure, compared with the SDF-I and SDF-II obtained by SWE and SWEC, respectively. USWEC increased the thermal stability and homogeneity of SDF-III but decreased its apparent viscosity and dynamic viscoelasticity. Moreover, the SDF-III exhibited more significant antioxidant and α-amylase inhibitory activities in vitro than SDF-I and SDF-II. Therefore, the USWEC technique had a greater potential for the highly-efficient production of SDF from wheat bran.
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Affiliation(s)
- Jing-Kun Yan
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Li-Xia Wu
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Wu-Dan Cai
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | | | - Yuqing Duan
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Haihui Zhang
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China
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33
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Effect of ultrasonic intensity on the conformational changes in citrus pectin under ultrasonic processing. Food Chem 2019; 297:125021. [PMID: 31253338 DOI: 10.1016/j.foodchem.2019.125021] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/13/2019] [Accepted: 06/15/2019] [Indexed: 11/22/2022]
Abstract
In this study, the effects of ultrasonic intensity on conformational changes in aqueous citrus pectin solution under ultrasonic processing and its possible transition mechanism were investigated. The results demonstrated that higher ultrasonic intensity (104.7 W/cm2) caused larger alterations in the molecular and conformational parameters of the semiflexible pectin (Mark-Houwink relation exponent a: 0.820, conformational parameter α: 0.607, structural parameter ρ: 2.22) in aqueous solution. Meanwhile, the semiflexible chain of pectin became more flexible (a: 0.804, α: 0.601, ρ: 1.75) at higher ultrasonic intensity in aqueous solution, as was verified by atomic force microscopy. Moreover, conformational changes in pectin from semiflexible chains to flexible chains or even flexible coils (a: 0.791, α: 0.597, ρ: 1.70) could be attributed to the decreased degree of methoxylation and neutral sugars in side chains and the destruction of inter- and intramolecular hydrogen bonds under ultrasonic processing. Therefore, these results have important implications for understanding the ultrasonic modification of pectin.
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