INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Jiayi Lin,Peiyao Wen,Wenjun Ying,Juan Yu,Junhua Zhang
Xylan-type hemicellulose hydrolysis by an organic acid solution for the production of xylo-oligosaccharides (XOS) is efficient and eco-friendly, but the effects of different organic acids on XOS production from Toona sinensis branch (TB) biomass is limited. In this work, under the conditions of 170 °C for 60 min, 33.1 % and 38.7 % XOS yields were obtained from polysaccharides present in TB by 2 % lactic acid (LA) and 6 % propionic acid (PA), respectively. Then 77 % of the lignin was removed by hydrogen peroxide−acetic acid pretreatment system, and 39.5 % and 44.7 % XOS yield were obtained from polysaccharides in delignification TB by 2 % LA and 6 % PA, respectively. It was found that PA hydrolysis, especially from delignified TB, resulted in higher XOS yield and purity compared to LA hydrolysis. Moreover, the content of byproducts (xylose, hydroxymethyl-furfural and furfural) in PA hydrolysate was lower. Following the hydrolysis process, the simultaneous saccharification and fermentation of the TB solid residue achieved an ethanol yield of 71.5 %. This work proposed an integrated process to preferentially convert the TB hemicellulose into valuable XOS and then convert the cellulose into ethanol. This process had the advantages of eliminating the need for isolation and purification of xylan, and the potential to obtain multiple products from the same raw material.
研究领域:
生物化学
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可再生能源
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DOI
PubMed
高影响因子
Waste and Biomass Valorization
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2021
·Vol. 13
·期 3
·1547-1563
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IF 3.703
Li Chunying,Meng Xianming,Tian Mengfei,Li Shen,Tian Yao,Wang Tingting,Zhao Chunjian
Pruning of Juglans mandshurica produces many branches, which are potentially a rich source of juglone although they are usually discarded as waste. Herein, we describe a water-in-oil microemulsion-based microwave-assisted extraction (MBMAE) method to isolate the juglone found in waste branches from J. mandshurica . In our experiment, J. mandshurica waste branch powder was added to the MBMAE system. Using the optimized microemulsion system comprising Tween 80: n -propanol: n -hexane:water at 27:13.5:4.5:55 (w/w/w/w), and a pH of 5.6, at an operating temperature of 40 °C, operating time of 63 s, and operating power of 400 W, the juglone yield was 4.58 mg/g from a ratio of microemulsion to branch power of 20:1 (mL/g). The juglone extraction yield using the MBMAE method was 1.86- and 6.65-fold better than that obtained from microwave-assisted extraction by ethanol (Ethanol-MAE) and heat reflux extraction by ethanol (Ethanol-HRE), respectively. The MBMAE method may be useful as an alternative to traditional extraction methods to isolate juglone. Graphic Abstract
研究领域:
植物化学
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环境科学
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药用植物研究
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高影响因子
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
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2025
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IF 4
Zepeng Yang,Huangling Wang,Chen Huang,Cui Wang,Zimeng Geng,Fei Lyu
Asian longhorned beetle ( Anoplophora glabripennis ) has caused significant economic and ecological damage. However, environmentally friendly control strategies remain limited. Elucidating the adult's feeding preference is critical for developing effective and sustainable pest management approaches. Therefore, we firstly compared the feeding preference of adults on the Salix babylonica branch with diameters of 0.5-cm, 2-cm, 4-cm, 8-cm, 16-cm. The results showed that both female and male significantly preferred 2-cm branches over the others. Subsequently, we analyzed metabolites allocation patterns across these branch types, identifying a total of 2216 metabolites. Further analyses showed that 1500 differentially accumulated metabolites (DAMs) in branches with diameters of 0.5-cm, 4-cm, 8-cm, 16-cm compared to 2-cm samples. These DAMs were significantly enriched in flavonoid, flavone and flavonol biosynthesis pathways when comparing the 2-cm branches to others. The contents of 10 DAMs in flavonoid, flavone and flavonol biosynthesis pathways showed a significant negative correlation with feeding consumptions. To evaluate the antifeeding effects of flavonoid-related metabolites, four economically viable and practically flavonoid-related metabolites (+)-taxifolin, naringenin, kaempferol, and phlorizin were selected for feeding bioassays. They significantly inhibited feeding consumption, with (+)-taxifolin, naringenin, and phlorizin reducing by up to 70 %. Dose-response experiments confirmed varying concentrations of these compounds significantly suppressed feeding consumption. Our findings demonstrate that the allocation patterns of flavonoid compounds in branches of different diameters regulate the feeding preferences of A. glabripennis . This study explores a metabolomics-driven approach that centers on size-structured flavonoid reprogramming in S. babylonica branches, aiming to establish a sustainable strategy for disrupting A. glabripennis 's feeding preference.
研究领域:
昆虫学
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植物生理学
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化学生态学
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次生代谢
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林业害虫管理
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分子生态学
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DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
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2025
·
IF 8
Jinqian Pang,Wenli Zhao,Yu Wang,Yan Li,Hong Wang,Weimin Zhang,Wenjuan Liang
Nephelium lappaceum L. is a tropical fruit with a characteristic hairy appearance, whose peel is used to reduce fever and diarrhea, while its leaves are employed to mitigate headaches. These advantages are mostly attributed to the accumulation of phenolic-related compounds in N. lappaceum . To investigate phenols accumulation and transformation in N. lappaceum peel, leaves and branches, this study investigated the major metabolites and their antioxidant and xanthine oxidase (XO) inhibitory activities. The results showed that the characteristic metabolites in peel, leaves and branches reflected a conversion process from simple phenols (C 6 ) to phenylpropanoids (C 9 ), and then to flavonoids (C 12 ). The peel extract exhibited the highest antioxidant activity, driven by its predominant simple phenols, gallic acid ( Ph7 ). The branch extracts displayed the strongest XO inhibitory activity, primarily attributed to the flavonoids: kaempferol 7- O - α - L -rhamnopyranoside ( Fl9 ), miquelianin ( Fl34 ) and procyanidin B2 ( Fl8 ). This study provides new directions for precisely utilization of N. lappaceum by-products.
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高影响因子
Forests
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2025
·Vol. 16
·期 1
·119
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IF 2.5
Xinqi Gao,Yafang Lei,Teng Sun,Yuanze Ma,Hao Guan,Li Yan
Enhancing the decay resistance ofPopulus tomentosawood through environmentally friendly methods is crucial for improving its durability and market competitiveness. Lignified twigs (LT), typically unsuitable as timber due to their small diameter, are rich in lignin, which degrades during thermal induction to produce antifungal organic compounds. In this context, the objective of this study was to develop a lignified twig preservative (LTP) by thermal induction from the LT ofActinidia chinensisvar.Jinyang. The antifungal activity of LTP under varying thermal conditions was analyzed, along with its chemical composition. Enzyme activity, cell membrane integrity, and respiratory metabolism in fungi treated with LTP were examined to elucidate antifungal mechanisms. Additionally, the decay resistance of LTP-treated wood was evaluated. Results revealed that LTP produced under N2at 220 °C exhibited robust antifungal activity againstTrametes versicolorandGloeophyllum trabeum, attributed to phenolic compounds such as syringaldehyde, syringone, vanillin, and vanillone. LTP inhibited fungal cellulases, hemicellulases, and ligninases by 30%–60%, disrupted cell membrane functionality, and suppressed respiratory metabolism. Poplar wood treated with LTP demonstrated significantly enhanced decay resistance (mass loss < 10%). This thermal-induced feedback pattern shows great potential for LT in wood preservation.
研究领域:
植物学
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材料科学
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环境科学
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微生物学
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高影响因子
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