JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2021
·Vol. 97
·期 5
·1267-1274
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IF 3.174
Ganning Zeng,Chunxian Hong,Yuan Ma,Mingming Du,Yan Zhang,Hongwei Luo,Bing Chen,Xiangliang Pan
BACKGROUND During the past two decades, aquatic polycyclic aromatic hydrocarbon (PAH) contamination has gained more and more attention, because of carcinogenicity or mutagenicity, toxicity, persistence and bioaccumulation, and a huge threat posed to entire ecosystems. RESULTS Sargassum horneri ( SH )-based carbon was pretreated with ethanol and formaldehyde, and obtained after pre-carbonization using H 2 SO 4 . The SH carbon powder was used to immobilize nano-TiO 2 in aquatic environment by a facile sol–gel method. The resulting C/TiO 2 catalyst was applied to photocatalytic aquatic naphthalene degradation under sunlight and showed the best naphthalene degradation performance of 83.77% under simulated sunlight, which could be attributed to the shape and structure contribution originating from SH . C/TiO 2 served as both adsorbent and catalyst in the degradation process of naphthalene, and the photodegradation process conformed to a double-exponential kinetic model, indicating that there are physical and chemical processes involved in the degradation. The mechanism for enhanced photocatalytic activity was verified as a synergistic mechanism resulting from SH -based carbon and TiO 2 , and showed industrial potential for removal aquatic PAH pollutants. CONCLUSIONS This study verifies that the synergistic effect resulting from SH -based carbon and TiO 2 enhanced the photocatalytic performance. © 2021 Society of Chemical Industry (SCI).
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Waste and Biomass Valorization
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2019
·Vol. 11
·期 9
·4743-4755
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IF 2.358
Zeng Ganning,You Hanzhang,Wang Kun,Jiang Yuanyuan,Bao Haijun,Du Mingming,Chen Bing,Ai Ning,Gu Zhengrong
Abstract One of the fundamental goals of bio-ethanol production is to find the alternative of traditional land-relied feedstock. A kind of macroalgae, Sargassum horneri ( S. horneri ) was chosen as the bio-source for ethanol production in the present investigation. The bioethanol was achieved by acid-pretreated, hydrolysis, and semi-simultaneous saccharification and fermentation (S-SSF) at small pilot scale. Immobilization of Pichia stipites in calcium alginate was adapted in the S-SSF process. Furthermore, effects of pre-hydrolysis time, cellulase loading, fermentation temperature and fermentation time on the concentration, and yield of bio-ethanol were evaluated by using response surface methodology (RSM). A maximum bioethanol concentration (2.89 g/L), and maximum bioethanol yield (0.11 g/g raw material) at cellulase loading (10 IU/g raw material), pre-hydrolysis time (53 min), SSF temperature (32 °C) and SSF time (14 h) were observed. The optimized bioethanol production data series fit the Gompertz model and modified Logistic model with an R 2 value of 0.997. The obtained Gompertz and modified Logistic coefficients indicated that S. horneri can serve as an efficient substrate for bioethanol production. The fermentation residues were used for typical dyeing contamination adsorption, the existence of the residual lignin and exposure functional groups made it an effective adsorbent, which followed the pseudo-second-order kinetics. These results are helpful for the scale-up development of lignocellulosic macroalgae based bioethanol production and fermentation residue use. Graphic Abstract
研究领域:
生物工程
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环境科学
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DOI
高影响因子
Algal Research-Biomass Biofuels and Bioproducts
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2025
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IF 4.5
Yongqi Tian,Ding Deng,Haitao Luo,Mingfeng He,Shaoyun Wang
Phlorotannins, recognized for their efficacy and safety as natural tyrosinase in hibitors, have posed challenges due to their limited extraction efficiency and the elusive nature of their mechanism of action. Here, we developed an ultrasonic-assisted enzymatic extraction (UAEE) protocol that significantly enhanced phlorotannin recovery from Sargassum horneri, achieving a total phenolic content (TPC) of 21.51 mg PGE/g DW. Subsequent purification using solvent extraction and Sephadex LH-20 yielded high-purity alginate phlorotannins (SHP), exhibiting potent DPPH radical scavenging and tyrosinase inhibitory activities, with IC 50 values of 22.71 and 26.90 μg/mL, respectively. Structural elucidation based on NMR and MS data suggested that SHP predominantly comprises fucophloroethols, with a degree of polymerization ranging from 3 to 8. Reciprocal plot analysis indicated that SHP inhibits tyrosinase activity through a competitive inhibition mechanism, while fluorescence spectroscopy revealed a dynamic quenching effect of SHP on tyrosinase. Molecular docking studies further elucidated t hat van der Waals forces and hydrophobic interactions are the primary forces governing the interaction between SHP and tyrosinase. Cellular experiments demonstrated the significant inhibitory effects of SHP on both melanin production and tyrosinase activity in B16-F10 cells. This research presents promising lead compounds for the development of novel tyrosinase inhibitors, while also providing theoretical and methodological foundations for the comprehensive utilization of Sargassum horneri.
研究领域:
海洋生物学
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天然产物化学
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药物开发
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2015
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IF 2.858
Ping Shao,Xiaoxiao Chen,Peilong Sun
In the previous study, we have found that polysaccharides isolated from Sargassum horneri exhibited bioactivities. The aim of this study was to investigate the antioxidant and moisture-preserving activities of molecular weight alteration of Sargassum horneri polysaccharide in vitro . For this purpose, the homogeneous active polysaccharide SHP was isolated from Sargassum horneri , and response surface methodology was employed to optimize the enzymatic degradation conditions to get SHP-derived fragments with different molecular weight. Results proved that the polysaccharide is capable of scavenging both ABTS and DPPH radicals in vitro . The study revealed that the polysaccharides had strong moisture-absorption and -retention capacities as compared to propanediol and glycerin. Furthermore, these data demonstrated that molecular weight had a certain effect on antioxidant activities and strong moisture-retention capacities of the polysaccharide from Sargassum horneri .
研究领域:
海洋生物学
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食品科学
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天然产物化学
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产品关联
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
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2020
·Vol. 231
·期 2
·1-12
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IF 1.9
Zeng Ganning,Hong Chunxian,Zhang Yan,You Hanzhang,Shi Wenyue,Du Mingming,Ai Ning,Chen Bing
A novel polymer/activated carbon composite was prepared in this study by one-step chemical activation of Sargassum horneri , followed by surface modification with chitosan, a widely abundant biopolymer. The prepared composite was used as adsorbent to remove one of the most toxic metal ions, Cr(VI), from aqueous solution. Surface characterization tests revealed the material to be predominantly mesoporous with the specific surface area of 293.4 m 2 ·g −1 and the average pore diameter of 6.27 nm. Enhanced uptake capacity of Cr(VI) by the prepared composite was obtained due to the presence of more metal-binding functional (amino and hydroxyl) groups on its surface. Extremely fast adsorption rate of Cr(VI) was also achieved due to the porous structure of the prepared composite. This study has clearly shown that Sargassum horneri can be a potential alternative precursor for carbon-based adsorbents and the proper designed polymer/AC composites can be tailor-made adsorbents for heavy metal removal.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
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2020
·Vol. 81
·期 6
·1114-1129
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IF 1.638
Wang Jun,Xie Qinglong,Li Ao,Liu Xuejun,Yu Fengwen,Ji Jianbing
In this study, an efficient route to synthesizing polyethyleneimine-modified ultrasonic-assisted acid hydrochar (PEI-USAH) is developed and reported. Ultrasonic irradiation technique was used as surface modification method to shorten the crosslinking reaction for hydrochar and polyethyleneimine (PEI). The PEI-USAH showed an excellent adsorption capacity for Cr(VI) from aqueous solution. The physicochemical properties of this PEI-modified adsorbent were comparatively characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller analysis and CNHS analysis. The effects of contact time, initial pH, and biosorbent dose on adsorption capacities were investigated. The batch adsorption experiments showed that PEI-USAH possessed the maximum adsorption capacities of 94.38 mg/g and 330.84 mg/g for initial Cr(VI) concentration of 100 mg/L and 500 mg/L, respectively. Furthermore, this adsorption process could be fitted to Langmuir adsorption and described by the pseudo second order kinetic model. Based on the above findings, PEI-USAH could be used as a potential adsorbent for removal of Cr(VI) from wastewater.
研究领域:
环境科学
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化学工程
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材料科学
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分析化学
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水处理技术
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DOI
高影响因子
Food Bioscience
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2025
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IF 5.9
Fanghang Li,Jing Tian,Yezhu Xu,Wenting Yi,Qiang Chen,Jiteng Wang,Su Jiang,Yunping Tang,Tao Han
In this study, soluble dietary fiber (SDF) was extracted from Sargassum horneri via enzymatic hydrolysis and evaluated for therapeutic efficacy in male ICR mice (5–6 weeks, 17–18 g) with intestinal injury induced by cyclophosphamide (CTX; 80 mg/kg/day intraperitoneal injection for 5 days). Animals received daily intragastric gavage of SDF at low- (250 mg/kg), medium- (500 mg/kg), or high-dose (1000 mg/kg) concentrations for 7 days. Biochemical assays demonstrated that SDF enhances antioxidant capacity in colon tissues and reduces serum lipopolysaccharide (LPS) levels ( P < 0.05). The up-regulation of tight junction proteins (Claudin-1, Zonula Occludens-1, P < 0.05) further confirmed the reinforcement of the intestinal barrier. Untargeted metabolomics revealed that SDF restores CTX-induced metabolic disorders by modulating the kynurenine pathway, optimizing histidine metabolism, and restoring glycerophospholipid homeostasis. Notably, 16S rRNA sequencing indicated that SDF induces significant shifts in microbial ecology, characterized by increased probiotics ( norank_f__Muribaculaceae , P < 0.05; Bacteroides , P < 0.05; Alloprevotella , P < 0.01). These findings highlight the intricate interplay between microbiota and metabolome in SDF-mediated intestinal protection, offering novel insights for developing functional foods to combat chemotherapy-associated gut toxicity.
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产品关联
DOI
高影响因子
Russian Journal of Marine Biology
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2021
·Vol. 47
·期 5
·380-387
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IF 0.621
Caijiao Chen,Leshan Han,Mengke Yao,Lei Shi,Miansong Zhang,Yaping Shi,Changheng Liu,Xinfeng Bai,Xue Liu,Xin Liu,Airong Jia
Abstract Two important brown algae, Sargassum horneri and Sargassum thunbergii are widely distributed along the coastal line of China. In this study, antioxidant, angiotensin-converting enzyme (ACE) inhibitory effects, and anticoagulant activities of the methanol extracts of S. horneri and S. thunbergii were investigated and compared. Total phenolic compounds and the fucoxanthin content were determined by the spectrophotometric and HPLC analyses, respectively, to relate phytochemical content to bioactivities of two Sargassum species. The phenolic compounds of S. horneri and S. thunbergii were also analyzed by LC-MS/MS. The results showed that S. horneri displayed higher antioxidant activities compared to S. thunbergii in all antioxidant bioassays evaluated, except the DPPH radical scavenging assay. Moreover, S. horneri showed a stronger ACE inhibitory effect (IC 50 = 0.44 mg/mL) compared to S. thunbergii (IC 50 = 1.81 mg/mL). Both S. horneri and S. thunbergii significantly prolonged the activated partial thromboplastin time (APTT) in blood plasma, and the APTT-prolonging effect of S. horneri was stronger than that of S. thunbergii . Salicylic acid was identified as the main phenolic compound in S. horneri , followed by m-coumaric acid, ferulic acid, and p -coumaric acid. Furthermore, S. thunbergii contained carnosic acid and salicylic acid. The total phenolic and fucoxanthin contents are positively correlated with antioxidant, ACE inhibitory and anticoagulant activities. These results indicated that S. horneri and S. thunbergii can be used as natural sources of functional foods because of their abundant bioactive compounds.
研究领域:
海洋生物学
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食品科学
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药理学
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DOI
高影响因子
危险品化学品经营许可证（带存储）