INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Yajun Hou,Shanshan Wang,Baojuan Deng,Yun Ma,Xing Long,Chengrong Qin,Chen Liang,Caoxing Huang,Shuangquan Yao
As an environmentally friendly lignocellulosic biomass separation technology, hydrothermal pretreatment (HP) has a strong application prospect. However, the low separation efficiency is a main factor limiting its application. In this study, the poplar components were separated using HP with ferric chloride and pH buffer (HFB). The optimal conditions were ferric chloride concentration of 0.10 M, reaction temperature of 150 °C, reaction time of 15 min and pH 1.9. The separation of hemicellulose was increased 34.03 % to 77.02 %. The pH buffering resulted in the highest cellulose and lignin retention yields compared to ferric chloride pretreatment (FC). The high efficiency separation of hemicellulose via HFB pretreatment inhibited the degradation of xylose . The hydrolysate was effectively reused for five times. The fiber crystallinity index reached 60.05 %, and the highest C/O ratio was obtained. The results provide theoretical support for improving the efficiency of HP and promoting its application.
研究领域:
生物质能
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林业工程
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DOI
PubMed
高影响因子
ChemistrySelect
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2024
·Vol. 9
·期 42
·e202404909
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IF 1.9
Shephrah Olubusola Ogungbesan,Eduardo Buxaderas,Rosemary Anwuli Adedokun,Yanina Moglie,Santiago Grijalvo,María Teresa García,Cui Bingbing,David Díaz Díaz,Guodong Fu
Graphical The reduction of silver ion by chitosan slurry leads to the green synthesis of well-characterized silver nanoparticles (10 nm) stabilized within the chitosan–silver nanocomposite film with enhanced antibacterial activities. This study is aimed at the in situ preparation and antibacterial study of silver nanoparticles within the matrix of an eco-friendly, biocompatible, biodegradable, and bioavailable biopolymer (chitosan) to form Chi–AgNP film via multiple noncovalent interactions between the organic polymer and the nanoparticles. The film is fully characterized by infrared and ultraviolet spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The characterization confirms the successful incorporation of silver nanoparticles into the polymeric network. Infrared spectroscopy reveals peaks corresponding to the vibration of functional groups present in chitosan with enhanced intensity and blueshifts caused by the presence of silver nanoparticles. Well-monodispersed spherical silver nanoparticles with an average size of 10 nm are observed in the Chi–AgNP film. The surface plasmon resonance at 447 nm is consistent with a typical silver plasmon. Furthermore, the antibacterial effects on E. coli and S. aureus were determined and attributed to the release of AgNPs observed by UV absorption.
研究领域:
材料科学
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生物医学
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纳米技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Chengyi He,Tianyue Wu,Jing Li,Xingyu Zhang,Zirui Zheng,Yuxia Gao,Chenhui Zhang,Tingjun Zhong,Yunfei Zhang,Fengpei Du
Pesticides are important agricultural production materials to ensure global food security, but the low utilization rate during pesticide application has caused a large amount of waste and environmental pollution. The use of pesticide carriers to deliver pesticides can help to prevent rapid release, assist in targeted release, and improve pesticide utilization. However, after completing pesticide delivery, less part of pesticide carriers has more functions and may remain in the environment, leading to material waste and environmental burden. Here, we propose that the environment-friendly carrier materials for pesticide delivery can synergistically enhance control efficacy with pesticides. Based on the bio-stimulant polyglutamic acid, amphiphilic polymers (mPEG-b-PLG) were constructed, and they assembled into nano micelle. After encapsulating prothioconazole (PTC) into the nano micelle through hydrogen bonding, electrostatic interactions and hydrophobic interactions through co-assembly, mPEG-b-PLG-PTC nanospheres with a diameter of approximately 120 nm were prepared. The nanospheres exhibit pH responsiveness for targeted release of pesticides, as well as excellent retention capacity, droplet bounce inhibition ability, and deposition capacity. At the same time, compared with commercial formulations, it has long-term antifungal properties and lower EC 50 , while its acute toxicity to human cells is lower, which can reduce cell apoptosis by about 63 %. It is also gratifying that the main root length, plant height, and fresh weight of wheat seedlings treated with mPEG-b-PLG have significantly improved, effectively applying carrier materials for synergistic effects. In summary, this work proposes a promising strategy to synergize pesticide carrier materials as active ingredients, providing new ideas for the integration of pesticide and fertilizer, improving pesticide utilization efficiency, and reducing environmental pollution.
研究领域:
农业科学
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材料科学
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环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）