Crystals
·
2023
·Vol. 13
·期 2
·342
·
IF 2.7
Yang Yu,Yuzhen Zhao,Yongsheng Mi,Fengmei Fang,Huimin Zhang,Zhun Guo,Yang Zhao,Dong Wang
A symmetrical pyrene derivative chemical structure was prepared by a classical synthetic method such as the Sonogashira cross-coupling reaction. The molecular structure of the product was characterised in detail by nuclear magnetic resonance (NMR), mass spectrometry (MS) and other methods. Furthermore, the optical properties of the novel products were studied by UV-vis and photoluminescence spectroscopy. The electrochemical properties of the molecules were fully characterised by comparison of electrochemical experiments and DFT simulation. Scanning electron microscope (SEM) observed that the product successfully formed a regular self-assembly structure. The product verifies the role of the molecular structure of the disc-mounted molecules on the optical and self-assembly properties, and is of reference value in the field of organic optoelectronic molecules
研究领域:
有机化学
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材料科学
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光电子学
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DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
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2012
·
IF 2.947
Liu Hao,Deng Huiping,Shi Jun
Pyrene and fluoranthene, typical polycyclic aromatic hydrocarbons, are very difficult to be removed from water due to their hydrophilic nature and relatively low reactivity towards ozone. In the study, Ce-loaded activated carbon (Ce-AC) is prepared and used as catalyst to promote pyrene and fluoranthene degradation by ozone. The catalytic activity of Ce-AC is investigated under various experiment conditions. Results indicate both of pyrene and fluoranthene removals are significantly enhanced in Ce-AC + O 3 due to effective generation of hydroxyl radicals ( OH), as compared to ozonation alone and AC + O 3 . The mineral matter present in the activated carbon positively contributes to remove fluoranthene and the optimized cerium loading of AC is 0.3% in ozonation process. Moreover, the toxicity of pyrene is more than that of fluoranthene and the reaction solution's toxicity is substantially reduced by catalytic ozonation with Ce-AC.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
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2017
·
IF 3.798
Jing Li,Qingxiang Zhou,Yongli Liu,Man Lei
In this study, nanoscale zero-valent iron nanoparticles (NZVIs) were coated with silica and polydopamine using a two-step process. The coated nanoparticles were applied as adsorbents for removal of two common polycyclic aromatic hydrocarbons pollutants, phenanthrene (PHE) and anthracene (ANT) from aqueous system. Adsorption kinetics followed a pseudo-second-order model. Isotherms and thermodynamics were investigated and the results indicated that the adsorption process fit best to the Freundlich model and exhibited the characteristics of an exothermal physical adsorption process. Owing to their superparamagnetic characteristics and stability, these adsorbents could be easily collected and recycled for reuse.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD PROTECTION
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2020
·
IF 1.581
Sijia Wang,Rongfa Guan,Haizhi Huang,Kai Yang,Ming Cai,Dandan Chen
ABSTRACT Larou is a traditional smoked meat product in China. In this experiment, larou was processed with different smoking materials and methods to determine whether differences in processing methods would affect the quality of the larou and the concentrations of carcinogens. Pork bellies were marinated, dried, and divided into four groups and then directly smoked with four different smoking materials for 40 min. The smoking material for larou that was most effective was then used with an indirect smoking device with an nano-activated carbon fiber filter and evaluated as a single-factor variable. The surface area of the nano-activated carbon filter was 978.00 m 2 /g, and this filter effectively adsorbed the ash particles from the smoke. For the group smoked with pomelo skins (PS), the highest concentrations and number of phenols were 4.48% and 11, respectively, which increased the smoke flavor significantly. The moisture was 32.64%, and the Staphylococcus, lactic acid bacteria, and yeast and mold levels were 0.98, 1.10, and 0.59 log CFU/g, indicating inhibition of harmful bacteria and a beneficial microbial environment for larou fermentation. The benzo[ a ]pyrene (B[ a ]P) concentration in PS smoke determined with the indirect smoking device was 1.82 μg/kg, whereas that determined with the direct smoking device was 36.1 μg/kg, a significant difference ( P < 0.01). These findings suggested that indirect smoking with PS could effectively maintain microbial quality and reduce the B[ a ]P[mc] concentrations in larou. This processing method can be used for the production of this meat product.
研究领域:
食品科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2018
·
IF 6.434
Shanshan Sun,Haizhen Wang,Yuanzhi Chen,Jun Lou,Laosheng Wu,Jianming Xu
Mycobacterium sp. WY10 was a highly effective PAHs-degrading bacterium that can degrade phenanthrene (PHE, 100 mg L −1 ) completely within 60 h and 83% of pyrene (PYR, 50 mg L -1 ) in 72 h. In this study, ten and eleven metabolites, respectively, were identified in PHE and PYR degradation cultures, and a detailed PHE and PYR metabolism maps were constructed based on the metabolic results. The strain WY10 degraded PHE and PYR with initial dioxygenation mainly on 3,4- and 4,5-carbon positions, respectively. Thereafter, PYR degradation entered the PHE degradation pathway via the ortho -cleavage. It was observed that the “lower pathway” of PHE and PYR degradations were different. Based on the kinetics of residual metabolites, PHE was degraded in a dominant phthalate pathway and a minor salicylate pathway. However, both phthalate and salicylate pathways played important roles on PYR degradation. The WY10 genome revealed there were fifty-three genes related to PAHs degradations, including a complete gene set for PHE and PYR degradation via the phthalate pathway. The candidate gene/ORF, BOH72_19755, encoding salicylate synthase might contribute in the salicylate pathway.
研究领域:
环境微生物学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Xiang Li,Chang-Ling Sun,Yu Xu,Shi-Hui Shan,Han Zheng,Xiao-Lu Guo,Jiang-Ning Hu
A novel method for benzo(α)pyrene (Bαp) enrichment from an oil matrix was developed by using magnetic nanoparticles (Fe 3 O 4 @dopamine/graphene oxide, Fe 3 O 4 @DA/GO) as extraction absorbents, and the chemical properties of the synthesized nanoparticles were characterized. Various parameters were investigated to optimize the extraction of Bαp from oils. Under optimal conditions (pH, 4; extraction time, 0.5 min; elution solvent, 1 mL; absorbent weight, 20 mg; elution time, 0.5 min), these nanoparticles showed excellent abilities to enrich Bαp from the saponified oil solution and were easily separated by a magnet. High-performance liquid chromatography plus fluorescence detection (HPLC-FLD) was then applied to determine the Bαp content with excellent linearity (R 2 = 0.999). The detection limit was 0.13 µg/kg, while the limit of quantification was 0.42 µg/kg. The spiked recoveries of Bαp in oils ranged from 73.5% to 121%. Compared with previous reports, the proposed method displayed many advantages, including a high efficiency of oil matrix removal, short extraction time, and convenient extraction procedure.
研究领域:
分析化学
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食品安全
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环境科学
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产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2022
·
IF 7.926
Junyuan Guo,Jianying Jiang,Yihua Chen,Xiaoying Wen,Wenjing Chen,Yifan Wang,Lin Su,Jing Cao
In order to achieve efficient adsorptive and oxidative removal of pyrene, a persulfate oxidation system with composite nZVI-BC prepared by loading nano-zero-valent iron on coconut shell biochar as an activator was established and applied. The results of adsorption experiments showed that at pH 3, when the dosages of BC, nZVI and nZVI-BC were all 1.5 g/L, the removal efficiency of pyrene reached 64.9%, 19.0%, and 61.2%, respectively after 120 min of adsorption. The best performance of nZVI-BC-persulfate system was achieved at pH 3, nZVI-BC 1.2 g/L and persulfate concentration 6 mM, and after 60 min of degradation, the removal efficiency of pyrene reached 99.4%. The pre-adsorption process was a promoting-step for pyrene degradation. The conversion of nZVI to Fe 2+ and Fe 3+ played an important role in the activation of persulfate to produce SO 4 •− and • OH, both of which were responsible for non-selectively oxidization pyrene. The support of BC could improve the dispersibility and activity of nZVI and improve of the above conversion. The intermediates with relatively lower toxicity were identified during pyrene degradation, and they were successively oxidized into CO 2 and H 2 O finally. In summary, nZVI-BC can be a promising catalyst for persulfate activation to degrade PAHs in wastewater.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Jiangqiao Bao,Jibing Li,Longfei Jiang,Weiping Mei,Mengke Song,Deyin Huang,Chunling Luo,Gan Zhang
Biochar has been widely used for the remediation of polycyclic aromatic hydrocarbon (PAH)-contaminated soil, but its mechanism of influencing PAH biodegradation remains unclear. Here, DNA-stable isotope probing coupled with high-throughput sequencing was employed to assess its influence on phenanthrene (PHE) degradation, the active PHE-degrading microbial community and PAH-degradation genes (PAH-RHD α ). Our results show that both Low-BC and High-BC (soils amended with 1 % and 4 % w/w biochar, respectively) treatments significantly decreased PHE biodegradation and bioavailable concentrations with a dose-dependent effect compared to Non-BC treatment (soils without biochar). This result could be attributed to the immobilisation of PHE and alteration of the composition and abundance of the PHE-degrading microbial consortium by biochar. Active PHE degraders were identified, and those in the Non-BC, Low-BC and High-BC microcosms differed taxonomically. Sphaerobacter , unclassified Diplorickettsiaceae , Pseudonocardia , and Planctomyces were firstly linked with PHE biodegradation. Most importantly, the abundances of PHE degraders and PAH-RHD α genes in the 13 C-enriched DNA fractions of biochar-amended soils were greatly attenuated, and were significantly positively correlated with PHE biodegradation. Our findings provide a novel perspective on PAH biodegradation mechanisms in biochar-treated soils, and expand the understanding of the biodiversity of microbes involved in PAH biodegradation in the natural environment.
研究领域:
环境科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
·
2022
·
IF 6.652
Xiao-min Zhang,Chao-yang Xu,Teng Hui,Ke-zhou Cai,Hui Zhou,Cong-gui Chen,Bao-cai Xu
Benzo[a]pyrene (BaP) is a polycyclic aromatic hydrocarbon (PAH) that has been found in barbecued meat products and has shown carcinogenic properties in humans. The purpose of this study was to investigate the effect of vinegar (fermented vinegars and distilled vinegar) on the generation of BaP in barbecued pork sausages. The results showed that fermented vinegars and distilled vinegar could significantly ( P < 0.05) inhibit the formation of BaP (26.8%–82.3%) in barbecued pork sausages. Furthermore, fermented vinegar could enhance the sensory evaluation of barbecued pork sausages(tenderness, flavor, juiciness and overall acceptability). Additionally, an intermediate of the Maillard reaction (hydroxymethylfurfural) (0.14–2.34 mg/kg), which is possibly associated with BaP generation, was inhibited because of the decrease in pH. The fermented vinegars, which were rich in phenols (1787.09–3089.60 mg GRE/L) and flavonoid (622.54–2167.97 mg RE/L) compounds, inhibited the formation of BaP by scavenging reactive oxide species (1,1-diphenyl-2-picrylhydrazine (DPPH) radical (85.50–96.73%) and hydroxy free radical (34.56–66.30%) scavenging activities) in pork sausages. Therefore, the vinegars inhibited the content of BaP in barbecued pork sausages by decreasing the pH and scavenging free radicals. In addition, ten phenolic compounds in sun vinegar were confirmed to be critical in inhibiting the content of BaP in barbecued pork sausages. This study provides a more affordable and feasible strategy for the inhibition of BaP in meat processing.
研究领域:
食品科学
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毒理学
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化学
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产品关联
DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2023
·Vol. 103
·期 6
·2838-2847
·
IF 4.1
Xiaomin Zhang,Gaofeng Hu,Chaoyang Xu,Wen Nie,Kezhou Cai,Hongmei Fang,Baocai Xu
BACKGROUND Ginger and its extracts have been frequently used in food processing and pharmaceuticals. However, the influence of ginger and its key compounds on benzo[a]pyrene (BaP) production in meat processing has not been investigated. The purpose of this study was to explore the effect of application of ginger and its important active ingredients on BaP formation and the mechanism of inhibiting BaP formation in charcoal-grilled pork sausages. RESULTS The DPPH scavenging (23.59–59.67%) activity and the inhibition rate of BaP (42.1–68.9%) were significantly increased ( P < 0.05) with increasing ginger addition. The active components extracted by supercritical carbon dioxide from ginger were identified by gas chromatography–mass spectrometry and 14 representative compounds (four terpenes, two alcohols, two aldehydes, four phenols and two other compounds, totaling 77.57% of the detected compounds) were selected. The phenolic compounds (eugenol, 6-gingerol, 6-paradol and 6-shogaol, accounting for 29.73% of the total composition) in ginger played a key role and had the strongest inhibitory effect on BaP (61.2–68.2%), whereas four other kinds of compound showed obviously feeble inhibitory activity (6.47–17.9%). Charcoal-grilled sausages with phenolic substances had lower values of thiobarbituric acid-reactive substances, carbonyl and diene (three classic indicators of lipid oxidation) ( P < 0.05). CONCLUSION Ginger and its key compounds could effectively inhibit the formation of BaP in charcoal-grilled pork sausages. Phenolic compounds make the strongest contribution to the inhibition of Bap formation, and the inhibitory mechanism was related to the inhibition of lipid oxidation. © 2023 Society of Chemical Industry.
研究领域:
食品科学
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毒理学
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化学
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产品关联
DOI
PubMed
高影响因子
ARCHIVES OF MICROBIOLOGY
·
2021
·Vol. 203
·期 7
·4259-4272
·
IF 2.552
Ahmad Manzoor,Ling Juan,Zhang Yanying,Sajjad Wasim,Yang Qingsong,Zhou Weiguo,Dong Junde
Polycyclic aromatic hydrocarbons (PAHs), originating from anthropogenic and natural sources, are highly concerned environmental pollutants. This study investigated the impact of two model PAHs (pyrene and phenanthrene) on bacterial community succession in the seagrass meadows sediment in a lab-scale microcosm. Halophila ovalis sediment slurry microcosms were established, one group was placed as a control, and the other two were treated with pyrene and phenanthrene. Bacterial community succession in response to respective PAHs was investigated by 16S rRNA amplicon sequencing. The results demonstrated that bacterial diversity decrease in each microcosm during the incubation process; however, the composition of bacterial communities in each microcosm was significantly different. Proteobacteria (37–89%), Firmicutes (9–41%), and Bacteroides (7–21%) were the predominant group at the phylum levels. Their abundance varies during the incubation process. Several previously reported hydrocarbon-degrading genera, such as Pseudomonas , Spinghobium , Sphingobacterium , Mycobacterium , Pseudoxanthomonas , Idiomarina , Stenotrophomonas , were detected in higher abundance in pyrene- and phenanthrene-treated microcosms. However, these genera were distinctly distributed in the pyrene and phenanthrene treatments, suggesting that certain bacterial groups favorably degrade different PAHs. Statistical analyses, such as ANOSIM and PERMANOVA, also revealed that significant differences existed among the treatments' bacterial consortia ( P < 0.05). This work showed that polycyclic aromatic hydrocarbon significantly affects bacterial community succession, and different PAHs might influence the bacterial community succession differently.
研究领域:
环境科学
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微生物学
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生态学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
·
2024
·
IF 1.9
Gege Zhao,Haoyu Xu,Hai Zhang,Hong Zhang,Yanlan Bi,Xuebing Xu
Crude coconut oil often contains high levels of polycyclic aromatic hydrocarbons (PAHs), which are commonly carcinogenic. The present work demonstrated that PAHs in coconut oil were significantly removed by ionic liquids (ILs). The relationship between the removal efficiency and the structures of ILs was investigated, using 12 different types ILs. Among these, 1-butyl-3-methylimidazolium tosylate ([Bmim][TOS]) showed the highest efficiency in removing benzo(a)pyrene (BaP). The optimal process conditions for the removal of PAHs using [Bmim][TOS] were explored, and the removal efficiency for benzo(a)anthracene (BaA), chrysene (CHR), benzo(b)fluoranthene (BbF), and BaP under the optimal conditions were 42.7 ± 1.0, 33.3 ± 1.4, 88.8 ± 0.9, and 73.8 ± 1.0%, respectively. Importantly, [Bmim][TOS] could be recycled up to five times without a significant decrease in PAHs removal. The quantum chemistry calculations and spectrum analyses were conducted to study the interactions between ILs and PAHs, using BaP as a model compound. The ability of [Bmim][TOS] to remove PAHs originate its high hydrogen bond accepting ability and the collaborative hydrogen bond interactions between the PAHs and ILs.
研究领域:
食品科学
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环境化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）