FOOD RESEARCH INTERNATIONAL
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2018
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IF 3.52
He Ren,Yongbo Lyu,Xinying Li,Shuxiao Zhang,Yusong Ye,Defu Li,Changdao Mu
Consumers demand more alternatives of riskless antibacterial agents to prevent microbial contamination in food industry. Oxidized carbohydrate may be a potential option as new antibacterial agent. However, the relatively weak antibacterial property of oxidized carbohydrate is not satisfactory. In this paper, dialdehyde β-cyclodextrins with different oxidation degree were prepared by periodate oxidation and their antibacterial properties were systematically studied. The results showed that multi-aldehyde groups were successfully introduced into β-cyclodextrin molecules by periodate oxidation. The aqueous solubility and stability of dialdehyde β-cyclodextrins were improved as expected. It is interesting that dialdehyde β-cyclodextrins possessed outstanding antibacterial activity against both Gram-positive and Gram-negative bacteria. The minimal inhibitory concentrations against E. coli, S. aureus and B. subtilis reached 0.63, 1.25 and 0.63 mg/mL, respectively. Moreover, dialdehyde β-cyclodextrins effectively inhibited bacterial growth on the surface of apples. The results demonstrated that oxidized oligosaccharide with multi-aldehyde groups and good dispersibility in aqueous solution possessed satisfactory antibacterial activity, which can be used as new antibacterial agent in food industry.
研究领域:
食品科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Jie Jiang,Jiaju Zhang,Ting Li,Xuhui Zhang,Yang Wang,Bihua Xia,Jing Huang,Yimin Fan,Weifu Dong
Chitin , a kind of polysaccharide mainly obtained from food waste, has emerged as an important biodegradable biopolymer in composite materials. The difficulty of aldehyde modification, which greatly limited the application of chitin nanocrystals , was addressed by applying a facile route of partial deacetylation followed by periodate oxidation in this study. Deacetylation occurred on the surface of both crystalline and amorphous regions, which were significantly degraded in the following periodate oxidation due to the inevitable cleavage of chitin chains, leading to an increase in the crystallinity index of obtained di-aldehyde chitin. The degree of deacetylation and periodate addition had limited improvement in the aldehyde content of di-aldehyde chitin with a maximum value of around 0.42 mmol/g. With further 2,2,6,6-tetramethylpiperidine-1-oxyl-mediated oxidation, the carboxyl content of tri-carboxyl chitin was improved to 1.58 mmol/g, which played a critical role in the dispersion efficiency and morphology of chitin nanocrystals. The obtained rod-like chitin nanocrystals with a ζ-potential value of −42 mV and an average size of 97 nm have potential application in dye-adsorption and emulsion stabilizers.
研究领域:
生物材料学
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化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
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2014
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IF 4.28
Jimin Guo,Liming Ge,Xinying Li,Changdao Mu,Defu Li
Oxidized xanthan gum with different aldehyde content is successfully prepared by periodate oxidization and used as a crosslinking agent for gelatin edible films . X-ray diffraction measurements and atomic force microscopy images demonstrate that degradation is concomitant with the oxidization process, leading to the decrease in crystallinity and the structure changes. Glycerol-plasticized gelatin–xanthan gum and gelatin–oxidized xanthan gum edible films are prepared using casting techniques. The optical properties studies show that all films are very transparent and have excellent barrier properties against UV light. Introducing aldehyde groups can improve the UV barrier properties, resulting from the increased C N groups by Schiff's base formation. Properties studies show that xanthan gum can drastically reduce the total soluble matter, moisture content and water vapor permeability and greatly improve the mechanical properties and thermal stability of gelatin films. With the increase of oxidization level of oxidized xanthan gum, the enhancement of water barrier properties, mechanical properties and thermal stability of gelatin–oxidized xanthan gum films is observed, which is mainly due to the covalently linking between the two polymers. Subsequently, the excessive degradation of xanthan gum will reduce the mechanical properties and thermal stability of gelatin films.
研究领域:
食品科学
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材料科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Yanhong Feng,Guangliang Liu,Yong Liang,Bo Lei
The exploitation and utilization of natural fibers still face many challenges due to their high crystallinity and extensive hydrogen bond network. Therefore, sustainable and effective modification strategies are currently essential. In this work, we investigate the processing and mechanical performances of natural fibers modified by combining sodium periodate oxidation and subsequent Schiff base reaction. Steam-exploded hemp fibers (HFs) were firstly oxidized with sodium periodate, and subsequently grafted with 1,10-diaminodecane. A decrease in the glass transition temperature of oxidized-aminated HFs (OAHFs) from 225 to 150°C was achieved as the dosage of periodate increased. Admirable mechanical properties were achieved despite a lower dosage of periodate due to melt bonding and chemical cross-linking between the fibers during heat processing. Particularly, dynamic compression molding was applied to heat processes and effectively improved the melt bonding and the chemical crosslinking, which increased flexural strength from 58.2 to 69.9 MPa. This strategy was moderate and low cost. The resulted material has good processing performance and excellent mechanical properties, which have large industrial application prospects and potential in the field of biodegradable environment-friendly materials.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Cleaner Production
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2020
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IF 7.246
Bo Lei,Yanhong Feng
Thermoplastic bio-based materials from lignocellulosic fibers are of great importance in a sustainable society. To enhance their preparation to an industrial scale, a facile strategy is proposed that combines continuous steam explosion (CSE) with periodate oxidation/borohydride reduction to modify sisal fibers . In the CSE pretreatment , the aldehyde content of oxidized products was increased by a maximum of ∼17%, and the yield of oxidized/reduced products was increased by a maximum of 25%. Furthermore, the tensile strength of hot-pressed sheets was increased to 42.2 MPa, representing a 175% improvement compared with sheets without CSE pretreatment, and a decreased glass transition temperature of ∼132 °C. Results indicated that CSE pretreatment was favorable for improving the modification efficiency and uniformity of sisal fibers, simultaneously achieving much better mechanical properties and thermoplasticity . Appropriate oxidation level of sisal fibers also achieved the better performances. The combined strategy was facile and scalable, and might significantly impact the widespread preparation and utilization of thermoplastic bio-based materials.
研究领域:
材料科学
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生物质能
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化学工程
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Yidong Zhang,Wangfang Deng,Chao Liu,Fei Yan,Meiyan Wu,Qiu Cui,Stefan Willför,Chunlin Xu,Bin Li
Dialdehyde nanocellulose (DANC), obtained via periodate oxidation, has been widely used in foods, cosmetics, and biomedical fields due to its unique characteristics. However, the high-crystallinity and tight structure of cellulose retards the efficiency of periodate oxidation for producing DANC. Herein, a novel sustainable and clean approach with less energy consumption and low cost was developed through LiBr·3H2O (LBTH) non-dissolving pretreatment, which can shorten the oxidation time of the followed periodate oxidation and reduce the oxidant consumption. It was shown that the cellulose Iβ structure of hardwood dissolving pulp (HDP) was largely transformed into an amorphous structure after LBTH non-dissolving pretreatment for 30 min, and the corresponding crystallinity of HDP was reduced from 83.2 to 48.7%. After pretreatment for 60 min, the aldehyde group content of the obtained DANC increased by around 30% compared to the control without pretreatment while the operational cost was reduced by 45%. Moreover, the fabricated DANC showed strong antibacterial activity against both Escherichia coli and Bacillus subtilis. LBTH was recovered and reused, and the pretreatment effectiveness was also maintained. This study provides a sustainable, cost-effective, and clean approach for the preparation of DANC and will promote the application of cellulose nanomaterials.
研究领域:
材料科学
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化学工程
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生物医学工程
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纳米技术
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2024
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IF 10.8
Bao-Jun Xu,Yao Lu,Nan Liu,Ying Chen,Min Liu,Qian-Yuan Wu,Ye Du
Periodate (PI) shows promising potential as an oxidant for wastewater treatment; however, its impact on the toxicity of wastewater remains unknown. Here, we found that with 100 μM PI addition, the cytotoxicity of wastewater increased from 4.8 to 7.6 mg-Phenol/L to 9.5 to 12.8 mg-Phenol/L, and genotoxicity increased from 0.3 to 0.9 μg-4-NQO/L. Interestingly, hypoiodous acid (HOI) was not detected during the reaction, and there was no observed increase in the concentration of total organic iodine (TOI). CHON components in dissolved organic matter changed most obviously in PI oxidation, which might serve as primary precursors for toxic byproducts. Cytotoxicity of typical nitrogen-containing precursors of tryptophan, lysine, phenylalanine, and tyrosine after PI oxidation increased from not detected to 14.7, 2.4, 4.1, and 3.2 mg-Phenol/L, respectively. Here, four nonhalogenated aromatic nitrogenous byproducts (N-DBPs) of 3-hydroxyquinoline, 4-hydroxyquinoline, benzopyridine, and benzopyrrole were confirmed using standards, and four byproducts such as 2-formylbenzonitrile were tentatively proposed. The cytotoxicity of the four confirmed byproducts was comparable to those known N-DBPs such as nitrosamines, suggesting attention should be given to these nonhalogenated but nitrogenous byproducts. The four confirmed byproducts were detected in two PI-treated wastewater samples with concentrations of 0.8, 0.98, 0.52, and 0.0038, and 18.28, 1.50, 0.57, and 0.0074 μg/L, respectively, with contributions less than 1.5% to the overall cytotoxicity. Further investigations are warranted to elucidate the primary drivers of toxicity in PI-treated wastewater.
研究领域:
环境科学
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水处理
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毒理学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）