JOURNAL OF STORED PRODUCTS RESEARCH
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2025
·
IF 2.8
Shengjun Wu,Ying Zhu,Chengxuan Li
Peanut seeds are highly susceptible to fungal contamination and insect infestation during ambient storage, leading to quality degradation, reduced germination, and hazardous aflatoxin B1 (AFB1) accumulation. This study evaluated the preservation efficacy of chitosan/cinnamaldehyde (CS/CA) composite coatings on peanut seeds during 12 months of storage. The synergistic action of CS (antimicrobial film-forming polymer) and CA (antifungal/antioxidant essential oil component) provided dual protection against biotic and oxidative damage. Compared to the untreated control, seeds coated with CS/0.5 % CA exhibited significantly reduced fungal proliferation (final count 2.0 log CFU/g versus 5.9 log CFU/g in control), diminished insect damage (1.9 % versus 4.6 %), and maintained enhanced germination capacity (82 % versus 61 %) over a 12-month storage period. Chitosan/cinnamaldehyde (CS/CA) composite coatings preserved peanut seeds for 12 months in this investigation. Antibiotic film-forming polymer CS and antifungal/antioxidant essential oil CA reduced biotic and oxidative damage. The controls had more fungal and insect damage than the CS/CA-treated seeds. CA formulations at 0.5 % and 1.0 % reduced Aspergillus flavus growth and AFB1 accumulation, resulting in final values of 7.0 and 6.0 μg/kg, much below the global regulatory limit of 20 μg/kg. CA also improved seed vigor measures, such as germination power and normal seedling rate The 1.0 % CA group had similar antifungal efficacy but reduced germination. The results indicate that the 0.5 % CS/CA coating is especially efficacious in extending seed viability, assuring safety, and preserving germination performance under ambient storage circumstances.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2025
·
IF 6.3
Yaoyao Huang,Ran Li,Junxuan Chen,Jinmei Deng,Zhenyi Leng,Fenglan Lu,Yuanfei Mei,Wei Fan,Liang Ao,Yongqiang Li,Huaili Zheng
Background Efficient lead extraction and recovery from wastewater are crucial for advancing sustainable metal recycling and reducing environmental pollution. Method Herein, a chitosan-TMA composite (CSTA) was synthesized via one-step cross-linking of chitosan with trimesic acid, exhibiting superior Pb(II) adsorption selectivity and capacity in aqueous solutions. Significant Findings The experimental results showed that the maximum adsorption capacity of CSTA for Pb(II) reached 98.59 mg/g at the optimal pH value of 6.0, which was much higher than that of unmodified chitosan (17.62 mg/g). Further investigation of the adsorption process revealed that the Pb(II) adsorption behavior on CSTA followed the pseudo-second-order kinetic model, suggesting a predominantly chemisorption-controlled process, and conformed to the Langmuir adsorption isotherm model with a theoretical maximum capacity of 104.17 mg/g at room temperature. Competitive adsorption experiments in a multi-cation solution (containing Zn 2+ , Cu 2+ , Ni 2+ , Co 2+ , Sr 2+ , Cd 2+ , and Ag + , pH 6.0) demonstrated CSTA's exceptional selectivity for lead, achieving a high adsorption capacity of 96.33 mg/g, significantly surpassing that of other metal ions. Combined experimental and characterization analyses revealed that Pb(II) removal primarily occurs via coordination with oxygen atoms from carboxylic acid groups in TMA. This work provides both an effective adsorbent for lead-contaminated wastewater treatment and mechanistic insights for designing biomass-based water purification materials.
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高影响因子
FUEL
·
2025
·
IF 7.5
Yu-Yang Cao,Yi Xiong,Xiao-Li Zhang,Xin-Xin Guan,Xiu-Cheng Zheng
Developing a convenient and environmental-friendly catalyst preparation method is of great significance, while the catalytic hydrolysis of ammonia borane (NH 3 BH 3 , AB) is an effective in-situ hydrogen production strategy but faces many challenges including the absence of practicable catalysts. In this study, Ru nanoparticles are tightly encapsulated into the framework of chitosan (CS)-derived carbon aerogel (CCA) through a facile ice-crystal template method combined with one-step direct calcination without using any additional chemical activators. The exciting coordination between Ru 3+ and the N/O-based functional groups of CS in aqueous solution, the hierarchical porous structure of CCA and the self-doped N/O favor the tight and high dispersion of Ru NPs, facilitate mass transfer, as well as improve the hydrophilicity of the resulting catalysts. Therefore, the resulting catalysts exhibit excellent activity and durability in the hydrolytic dehydrogenation of AB. Activated by the optimal [email protected] , the turnover frequency (TOF) and hydrogen generation rate (HGR) in the absence of any strong base are separately 136.6 min −1 and 30.3 × 10 3 mL min −1 g Ru −1 , and the apparent activation energy is 42.1 kJ mol −1 . Interestingly, the introduction of NaOH (2.0 M) can further significantly accelerate hydrogen release (TOF = 562.9 min −1 , HGR = 124.7 × 10 3 mL min −1 g Ru −1 ). Additionally, the kinetic isotope effect of 2.82 recommends that an O–H bond dissociation in water acts a dominant role in AB hydrolysis over [email protected] . This work develops a facile and environmentally friendly method for preparing supported metal-based nanocatalysts that can be effectively used in many reactions including AB hydrolysis.
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高影响因子
VETERINARY RESEARCH
·
2025
·
IF 3.5
Su Kai,Ren Jing,Zhang Yanan,Yuan Chen,Wang Yawen,Yang Liu,Fu Lizhi,Fan Tingli,Song Qinye
Porcine epidemic diarrhea (PED), a highly contagious intestinal disease caused by PEDV, threatens newborn piglets and causes enormous losses in the swine industry. Intestinal mucosal immunity is vital for defense against PEDV. Chitosan (CS), a mucin-adhesive biodegradable polysaccharide, has emerged as a promising mucosal vaccine delivery vector and antigen adjuvant. To develop a PEDV mucosal vaccine, we prepared S1-CS nanoparticles (NPs) loaded with the S1 domain of the PEDV spike (S) protein. We evaluated their ability to induce mucosal immune responses in mice via different inoculation routes and to confer immune protection in piglets after oral inoculation. The results showed that S1-CS NPs exhibited no cytotoxicity and remained stable in simulated gastric fluid in vitro. Compared with oral administration, intramuscular inoculation of S1-CS NPs induced higher levels of PEDV-specific serum IgG in mice. However, PEDV-specific IgA was detected only in the serum and intestinal lavage fluid of orally vaccinated mice. Oral administration also elicited higher IFN-γ levels than intramuscular injection, suggesting stronger activation of cellular immunity. In piglets, oral S1-CS NPs induced serum neutralizing antibodies and IgA responses in both serum and intestinal mucosa, increased the number of IgA-secreting cells in the intestine, reduced viremia and virus shedding, and improved intestinal villus morphology. These findings indicate that the S1-CS NPs developed in this study represent promising candidates for an oral mucosal PEDV vaccine.
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DOI
PubMed
高影响因子
JOURNAL OF BIOACTIVE AND COMPATIBLE POLYMERS
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2015
·
IF 2.352
Quan Liu,Qinhua Zuo,Rui Guo,An Hong,Chenghua Li,Yi Zhang,Liumin He,Wei Xue
In this research, a novel drug delivery system consisting of alginate microspheres and carboxymethyl chitosan/poly(vinyl alcohol) hydrogel was developed for prolonged and sustained controlled drug release. The alginate microspheres and various volume ratios of carboxymethyl chitosan were incorporated physically into poly(vinyl alcohol) to form the composite system. Scanning electron microscope, rheometer, differential scanning calorimetry, and thermogravimetric analysis were used to investigate the morphological, rheological, and thermal properties. The adsorptivity and hydrogel content were evaluated by swelling ratio and gel fraction, respectively. Incorporation of alginate microspheres improved the swelling ratio and thermal stability of carboxymethyl chitosan/poly(vinyl alcohol) hydrogel. Carboxymethyl chitosan decreased gel fraction and elasticity while increased swelling and porosity of hydrogel. In vitro, the release profiles of bovine serum albumin from the composite gels were sustained for 2 weeks in phosphate buffered saline.
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2021
·Vol. 21
·期 10
·5057-5065
·
IF 0
Liang Bo,Chen Xu,Chen Chuansheng,Liu Zhengchun
The binder acts a pivotal part in determining the mechanical and electrochemical performances of lithium-ion battery electrodes. Herein, a series of water-soluble Si anode binders based on carboxymethyl chitosan (C-Cs) and styrene-butadiene rubber (SBR) is developed. Water-soluble C-Cs
and aqueous emulsion SBR solution are mixed to form C-Cs/SBR binders. The physical properties of the modified Si electrode are investigated through electrolyte swelling test, peeling test, and scanning electron microscopy. The mechanical strength provided to Cu foils and active substances
by the C-Cs/SBR binder is higher than that produced by C-Cs. This performance can effectively reduce the stress/strain caused by the drastic volume change of the Si anodes during repeated uses and improve the electrochemical property of lithium-ion batteries. The initial thicknesses of the
Si electrodes with polyvinylidene fluoride, C-Cs, and C-Cs/SBR20 binders are approximately 7.1, 7.2, and 6.9 µm, respectively. After 100 cycles, their initial thicknesses increase to 11.2, 12.4, and 7.2 µm and correspond to expansions of 57.8%, 72.2%, and 4.3%, respectively.
The discharge capacity of Si electrodes containing C-Cs/SBR20 binder reaches to 1340 mAh·g−1 when the current density is 4 A·g−1, and reserves to be 1020 mAh·g−1 after undergoing 400 cycles of repeated use at
500 mA·g−1.
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PubMed
JOURNAL OF FOOD PROCESSING AND PRESERVATION
·
2019
·Vol. 43
·期 10
·e14116
·
IF 1.288
Xiaojie Zheng,Yue He,Huan Zhou,Chunhua Xiong
This study evaluated the effects of chitosan oligosaccharides (COS)–nisin conjugates (COS-N CON) on the quality changes of Collichthys niveatus during storage at 4°C. COS–N CON were prepared by heating the aqueous solution of COS and nisin together at 80°C for 24 hr. In order to control the degree of conjugation, the total concentration and pH of mixed solution were adjusted to 2% and 2.00, respectively. COS–N CON were identified by Fourier transform infrared (FT–IR) and X–ray diffraction analysis (XRD). During storage, COS–N CON treated samples showed retarded sensory and texture deterioration, with significantly slower increase rate of pH, total viable counts (TVC), and total volatile basic nitrogen (TVB–N). At the day 6, the TVC, TVB–N, and hardness of C. niveatus treated with distilled water reached 6 log 10 (CFU/g), 28 mg/100 g, and 15 g, respectively; while that in COS–N CON treated samples was 5.1 log 10 (CFU/g), 21 mg/100 g, and 18 g, respectively. Based on indicating parameters tested, it was revealed that the COS–N CON treatment could prolong the shelf life of C. niveatus by 2 days during chilled storage, compared to the chitosan oligosaccharides (COS)–nisin mixture (COS–N MIX). Practical applications The novel preservation agent we created in this study could be considered as safe and renewable, which could be a great advantage in practical application. It was formed by conjugating chitosan oligosaccharides (COS) with nisin via Maillard reaction. Both COS and nisin were considered as green and renewable antimicrobial agents. Maillard reaction is one of the main reactions taking place in food that does not need catalyst and organic solvent. COS–nisin conjugates had a better effect on preservation of Collichthys niveatus , compared with COS–nisin mixtures, which indicating Maillard reaction could be the effective way in modifying the preservation properties of natural antimicrobial agents.
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高影响因子
DESALINATION
·
2024
·
IF 8.3
Yiwen Xue,Xinhong Han,Dan Xu,Zihang Zhang,Lingjun Zhu,Shurong Wang
Solar-driven interfacial water evaporation is a promising technique for recovering clean fresh water and alleviating water scarcity . In this work, an all-in-one chitosan-based composite aerogel with a highly porous semi-clad structure was fabricated. In the process of interfacial water evaporation, the hydrophilic outer layer of the aerogel efficiently transported water to the upper surface through two-dimensional transport channels. Simultaneously, it rapidly converted absorbed sunlight into heat, demonstrating excellent photothermal conversion capabilities for efficient water evaporation. The hydrophobic inner core enabled the aerogel to float stably on the water surface , and had a low thermal conductivity to reduce heat dissipation into the water body. Under 1 sun illumination (1 kW m −2 ), the composite aerogel showed an evaporation rate of up to 1.547 kg m −2 h −1 , corresponding to an evaporation efficiency of 91.47 %. Notably, the composite aerogel demonstrated high stability and recyclability in desalination and heavy metal wastewater treatment , which had great potential in recovering both clean water and heavy metal salts. The evaporator with a semi-clad structure had practical applications in solar desalination and sewage treatment due to its stable and efficient evaporation performance and simple preparation method.
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高影响因子
Analytical Methods
·
2014
·Vol. 7
·期 5
·2050-2054
·
IF 1.938
Lei Zhang,Zhichao Xiong,Lingyi Zhang,Bohao Yu,Weibing Zhang
A magnetic solid-phase extraction method for detection of trace copper(II) was developed by graphite furnace atomic absorption spectrometry. A novel adsorbent, consisting of magnetic nanoparticles coated with dithizone (DZ)-modified chitosan, was prepared. The adsorbent was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and energy dispersive spectrometry (EDS). Effects of pH, amount of adsorbent, adsorption time, elution condition, interference ions and adsorption capacity on the detection of trace copper ion were studied. Under the optimized conditions, the detection limit of the developed method was 0.18 μg L−1 and the adsorption capacity was 210 mg g−1. This adsorbent was successfully applied to the analysis of environmental water samples and certified reference materials.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2013
·Vol. 25
·期 3
·723-731
·
IF 2.141
Shi Zhonggen,Guo Rui,Li Weichang,Zhang Yi,Xue Wei,Tang Yu,Zhang Yuanming
Chitosan (CS) was first modified hydrophobically with deoxycholic acid (DCA) and then with polyethylene glycol (PEG) to obtain a novel amphiphilic polymer (CS–DCA–PEG). This was covalently bound to folic acid (FA) to develop nanoparticles (CS–DCA–PEG–FA) with tumor cell targeting property. The structure of the conjugates was characterised using Fourier transform infrared and 1 H nuclear magnetic resonance spectroscopy and X-ray diffraction. Based on self-aggregation, the conjugates formed nanoparticles with a low critical aggregation concentration of 0.035 mg/ml. The anti-cancer drug doxorubicin (DOX) was encapsulated into the nanoparticles with a drug-loading capacity of 30.2 wt%. The mean diameter of the DOX-loaded nanoparticles was about 200 nm, with a narrow size distribution. Transmission electron microscopy images showed that the DOX-loaded nanoparticles were spherical. The drug release was studied under different conditions. Furthermore, the cytotoxic activities of DOX in CS–DCA–PEG–FA nanoparticles against folate receptor (FR)-positive HeLa cells and FR-negative fibroblast 3T3 cells were evaluated. These results suggested that the CS–DCA–PEG–FA nanoparticles may be a promising vehicle for the targeting anticancer drug to tumor cells.
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PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Hui Yun Zhou,Pei Yan Hao,Shuai Qiang Jiang,Wan Hui Zhang,Li Jun Ren,Hui Jie Zheng,Ya Wei Chen,Jun Liang Chen,Hyun Jin Park
In this paper, cyclodextrin-grafted-chitosan (CD-g-CS) with different degrees of substitution (DS) was synthesized successfully by the reaction of O -p-toluenesulfonyl-β-cyclodextrin (TCD) and chitosan (CS), and a novel injectable thermosensitive hydrogel with rapid gelation was developed by physical cross-linking using dual gelling agents of αβ-glycerophosphate-sodium and hydrogen carbonate (GP-SHC). The results of 1 H-NMR showed that the DS of CD-g-CS increased with the increase of TCD/CS (w/w). The influence of CD-g-CS with different DS, the concentration of SHC, and the ratio of CD-g-CS/GP-SHC (v/v) on gel time, swelling, drug release, degradation, and antibacterial activity of hydrogels prepared were studied. The results of FTIR indicated that the intermolecular interaction occurred in the hydrogel. And the hydrogel had a three-dimensional porous structure seen from SEM images. Compared with CS/GP hydrogel, the gel time of prepared hydrogel was shorter, which was less than 6 min, and the shortest gel time was 0.5 min. The prepared hydrogels had a good swelling ratio and degradable behavior. Berberine hydrochloride (BBH) was used as a model drug, and the gel showed a sustained drug release profile. In addition, the hydrogel had excellent antibacterial activity against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) . Therefore the BBH@CD-g-CS/GP-SHC hydrogels had great potential in the development of biomedical drug delivery systems and antibacterial materials.
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高影响因子
Current Analytical Chemistry
·
2022
·Vol. 18
·期 4
·495-503
·
IF 2.374
Bai Xiaopeng,Wu Ying,Deng Lili,Gong Li,Xu Tianchi,Song Wenbo,Feng Xun
As a vital amino acid in the human body, tyrosine is indispensable in various biological processes, and therefore its accurate and simple determination is of crucial importance. In this work, a facile approach was developed to construct a molecularly imprinted sensor for tyrosine via
co-electrodeposition of chitosan, β-cyclodextrin and tyrosine on the surface of indium tin oxide that was pre-coated with multi-walled carbon nanotubes (MWNTs). Methods: Benefitting from the excellent film-forming ability and the rich functional groups to form a hydrogen bond with
target molecules, chitosan was utilized to form a recognition matrix. MWNTs and β-cyclodextrin were then introduced to enhance the selectivity and sensitivity to tyrosine, due to the subtle electronic, catalytic properties and possible π-π interaction of MWNTs with tyrosine, as
well as recognition ability of β-cyclodextrin. The morphology of the imprinted films was characterized by a scanning electron microscope. The electrochemistry and tyrosine sensing performance were investigated in detail by cyclic voltammetry and chronoamperometry. Results: Amperometry
results showed that the imprinted sensor exhibited a linear range of 1.0×10−6 to 1.0×10−4 M and 1.0×10−4 to 1.0×10−3 M for tyrosine determination, with a detection limit of 6.0 × 10−7 M (S/N=3). Moreover, a satisfactory recovery in
the range of 99.0% to 105.1% was obtained with the application of the imprinted sensor in artificial urine samples analysis. Conclusion: The imprinted electrode is reusable with satisfactory reproducibility and stability in tyrosine determination.
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