JOURNAL OF ORGANIC CHEMISTRY
·
2021
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IF 4.354
Ling Tang,Yangyi Zhang,Guisheng Deng
Ag(I)-catalyzed cascade reactions involving enynone cyclization and cross-coupling with phosphorus ylides have been achieved for the first time. Subsequent treatment of the reaction mixture with I2 afforded the corresponding (E)-α-alkenylfurans in 73–95% yields with excellent stereoselectively. A reasonable mechanism has been proposed.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zexiao Zheng,Juhua He,Chencheng Dong,Irene M.C. Lo
A new photoelectrochemical (PEC) system by means of adding sodium sulfite (Na 2 SO 3 ) was developed to treat sewage. The PEC system simultaneously promoted pharmaceuticals and personal care products (PPCPs) degradation, H 2 evolution and E. coli disinfection using an optimized, visible–light driven BiVO 4 photoanode. The PEC reactions were first carried out in 1.5 mM Na 2 SO 3 electrolyte. 92.3% of 2 ppm benzophenone-3 (BZP) was degraded, and 115.36 μmol of H 2 was produced in 90 min at 1.0 V vs. Ag/AgCl, which was a significant improvement over cases where the electrolyte was either Na 2 SO 4 or NaCl. The sulfite ions were first activated by holes and then converted into sulfate radicals, which played a dominant role in the degradation of BZP. As the holes were caught by the sulfite, charge separation was also enhanced, increasing H 2 evolution. The PEC reactions were also used to treat real sewage, in which case an 82% improvement in the rate constant of BZP degradation, 60% increase of H 2 evolution, and 0.78 log enhancement of E. coli disinfection were achieved by adding 1.5 mM Na 2 SO 3. The system was also feasible to degrade various PPCPs, and showed excellent reusability and stability, proving its great potential in sewage treatment.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yanjun Zheng,Rui Yin,Ye Zhao,Hu Liu,Dianbo Zhang,Xianzhang Shi,Bing Zhang,Chuntai Liu,Changyu Shen
Flexible wearable pressure sensors have attracted tremendous interest for applications in human health monitoring, electronic skin, artificial intelligence and so on. However, it is still a critical challenge for pressure sensors to simultaneously achieve high sensitivity and wide sensing range while performing well in response time, stability, reliability and wearing comfortability. Here, conductive MXene/cotton fabric was fabricated using the simple dip-coating technique and then sandwiched between polydimethylsiloxane film and an interdigitated electrode for flexible wearable piezoresistive pressure sensor. The abundant hydroxyl groups of cotton fabric and functional groups of MXene were beneficial for the good adhesion of conductive MXene nanosheets onto the entangled fiber networks, constructing effective conductive network. Taking advantage of the excellent flexibility and three-dimensional porous structure of cotton fabric and the special sandwich architecture of the sensor, the MXene/cotton fabric (MCF) based pressure sensor exhibited high sensitivity (5.30 kPa −1 in the pressure range of 0–1.30 kPa), broad sensing range (0–160 kPa), rapid response/recovery time (50 ms/20 ms), excellent stability and long-term durability. Moreover, the MCF based pressure sensor can be employed to detect and distinguish various human health signals, including finger motion, early stage Parkinson’s static tremor and wrist pulse. Importantly, E-skin was also designed based on the MCF based pressure sensor for the recognition of different tactile stimuli, exhibiting promising potential in next generation wearable electronics.
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CHEMOSPHERE
·
2023
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IF 8.8
Chengjie Xue,Long Zhou,Zhanqiang Fang
Hydrophobic organic compounds (HOCs) in e-waste disposal sites are difficult to remove effectively. There is little reported about zero valent iron (ZVI) coupled with persulfate (PS) to achieve the removal of decabromodiphenyl ether (BDE209) from soil. In this work, we have prepared the flake submicron zero valent iron by ball milling with boric acid (B-mZVI bm ) at a low cost. Sacrifice experiments results showed that 56.6% of BDE209 was removed in 72 h with PS/B-mZVI bm , which was 2.12 times than that of micron zero valent iron (mZVI). The morphology, crystal form, atomic valence, composition, and functional group of B-mZVI bm were determined by SEM, XRD, XPS, and FTIR, and the results indicated that the oxide layer on the surface of mZVI is replaced by borides . The results of EPR indicated that hydroxyl radical and sulfate radical played the dominant role in the degradation of BDE209. The degradation products of BDE209 were determined by gas chromatography-mass spectrometry (GC-MS), accordingly, the possible degradation pathway was further proposed. The research suggested that ball milling with mZVI and boric acid is a low-cost means of preparing highly active zero valent iron materials. And the mZVI bm has promising applications in improving the activation efficiency of PS and enhancing the removal of the contaminant.
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Frontiers in Sustainable Food Systems
·
2024
·
IF 3.7
Wang Qiwei,Shi Daliang,Hu Jiajing,Tang Jiahao,Zhou Xianxiu,Wang Lilei,Xie Jialing,Jiang Yongwen,Yuan Haibo,Yang Yanqin
Rolling plays an important role in shaping the characteristic quality of black tea. However, the dynamic alterations in volatile compounds during the rolling process remain unclear, which hampers the quality control of black tea. In this study, the dynamic changes of volatile compounds in Congou black tea throughout the rolling process were explored by a combination of GC-E-Nose and GC–MS analysis. The results of PCA and PLS-DA by GC-E-Nose revealed significant alterations in the volatile profiles, particularly at the 15-min rolling stage. A total of 82 volatile compounds including eight categories were identified in Congou black tea during the rolling process. The most abundant volatiles were aldehydes, alcohols, and esters. Through the integration of variable importance in the projection >1 and p < 0.05, 21 volatile compounds were pinpointed as pivotal volatiles responsible for distinguishing diverse rolling processes. According to their pathways, glycoside-derived volatiles (GDVs) (such as linalool and geraniol) and fatty acid-derived volatiles (FADVs) (such as (Z)-2-hexen-1-ol and hexanal) highlighted the pivotal role in the formation of the aroma of black tea during rolling process. GDVs, characterized by floral, honeyed, and fruity aromas, reached the lowest point at 35-min rolling and subsequently rebounded. FADVs exhibited an ascending trajectory during the initial 15-min rolling, followed by a downward trend. These findings provide invaluable insights into the aroma evolution during the rolling stage, offering strategies for enhancing the aroma quality of Congou black tea.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·
IF 6.7
Liangman Shi,Lunhui Zhu,Jialing Cao,Xiaoyan Xu,Xiaoshu Tang,Shuang Zhang,Lianfu Zhang,Cheng Yang
A rapid method for producing cis-(Z)-lutein esters from all-E-lutein esters was developed using I2, AlCl3, and sulfides as catalysts. Z-Isomer-rich lutein (38.6%) and Z-isomer-rich lutein esters (34.8%) by I2 were obtained. The antioxidant activities of Z-isomer-rich lutein and Z-isomer-rich lutein esters were higher than those of their all-E-isomers by Ferric Reducing Antioxidant Power, ORAC-L, and ABTS assays. The UV-A and UV-B blocking activities of Z-isomer-rich lutein esters were higher than those of all-E-lutein esters. After short-term ingestion by rats, the in vivo absorption concentration of Z-isomer-rich lutein (222.3 pmol/mL) in a high dose was higher than those of other forms of lutein (<125.6 pmol/mL). Enrichment of Z-lutein (Z-ratio: 59.5%) and Z-lutein esters (Z-ratio: 44.4%) was achieved in hexane and ethanol, respectively. We conclude, for the first time, that Z-isomer-rich lutein esters play a more important role than all-E-lutein esters in preventing oxidation and UV-blocking activity and are estimated to exhibit higher bioavailability than all-E-lutein esters and all-E-lutein.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Jinxing Xu,Zhouyu Jiang,Mingliang Wang
A CT cocrystal FPTC of donor FPHD and acceptor TCNB was formed via self-assembly. • Donor-acceptor stacking mode and π⋯π interactions were quantified by SCXRD. • CT effect was analyzed through detailed DFT calculation. • Band-gap and optical modulation were induced by CT via the incorporation of TCNB. Investigation of the structure and optical property of charge transfer (CT) cocrystals comprising electron donors and acceptors is indispensable to clarify intrinsic relationships between donors and acceptors and construct new organic fluorescent materials. Herein, the electron donor ( E )-N’-(9-phenanthrylmethylene) benzohydrazide (FPHD), and acceptor 1,2,4,5-benzenetetracarbonitrile (TCNB) formed cocrystal FPTC (FPHD-TCNB) through supramolecular self-assembly. The crystal structure and π⋯π stacking mode of cocrystal FPTC were identified through single-crystal X-ray diffraction. The variation of C ≡ N stretch wavenumbers of TCNB and FPTC in Fourier-transform infrared spectra and the 75 nm red-shift in solid-state ultraviolet visible diffuse reflectance spectra confirmed the formation of cocrystal FPTC. Additionally, the 119 nm red-shift in solid-state fluorescence emission spectra indicated enhanced fluorescence, prolonged average fluorescence lifetime and elevated quantum yield of cocrystal FPTC. Through density functional theory (DFT), the weak interactions in cocrystal FPTC were analyzed, confirming the CT effect in FPTC. Furthermore, the narrowed band gap due to CT effect resulted in the change of transition dipole moment under excited state in cocrystal FPTC, directly leading to improved optical property of FPTC. This study illustrated CT effect on the structure and optical property of cocrystal FPTC via experimental exploration and theoretical analysis, providing a new strategy for novel organic fluorescent materials and endowing the cocrystal with promising research value for optoelectronic applications. Download: Download high-res image (235KB) Download: Download full-size image
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Advanced Healthcare Materials
·
2026
·
IF 11
Zhong Cheng,Zhanyuan Qu,Jiaxin Sun,Zhihua Duan,Yong An,Yan Zhang,Jun Yang
Renal fibrosis lacks experimentally tractable human-relevant models that integrate defined stromal programming with spatially controlled profibrotic cues. Here, we developed a dual E-/VE-cadherin-Fc (EVE) interface to condition human mesenchymal stem cells (MSCs) under CTGF/TGF-β stimulation. Cells showed increased expression of Gli-1, NG2, PDGFRβ, and FAP and activated transcription of extracellular matrix remodeling. These changes were consistent with the acquisition of a Gli-1 + perivascular-like profibrotic stromal phenotype, and were accompanied by reorganization of cadherin-catenin complexes, actin cytoskeletal rearrangement, and increased YAP nuclear localization. Cell-sized PLGA/chitosan-heparin microparticles were subsequently functionalized with E-/VE-cadherin-Fc and loaded with CTGF/TGF-β. Co-assembly of these microparticles with the conditioned stromal cells (gMSCs) and renal epithelial cells (HK-2) generated 3D renal fibrotic microtissues that combined cadherin-mediated adhesive presentation with localized cytokine delivery. The resulting microtissues exhibited a broader distribution of α-SMA, Collagen I, and Fibronectin, together with reciprocal epithelial-stromal signaling and spatially organized fibrotic activation. As a proof of concept for pharmacological evaluation, the microtissues responded to pirfenidone (PFD) in a dose-dependent manner, with 100 µM PFD reducing α-SMA expression by ∼73% while preserving microtissue viability. Together, these findings establish a material-enabled, cadherin-guided strategy for constructing disease-relevant stromal organization and spatially controlled profibrotic signaling in human renal fibrosis models.
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Nutrients
·
2026
·Vol. 18
·期 2
·310
·
IF 5
Xin Zhang,Di Wang,Yang Wang,Meimei Wang,Juncheng Wang,Yue Sun,Siman Chen,Xinting Qu,Antong Xia,Hongxin Liu,Jihui Wang,Meng Liu
(E)-Flavokawain A (FKA), the primary chalcone constituent of Piper methysticum , exhibits diverse pharmacological properties and holds significant potential for therapeutic development. Objectives : This study aims to investigate the anti-colorectal cancer effects and mechanisms of FKA. Methods : Using AOM/DSS-induced colorectal cancer models in C57 mice, the research examines the impact of different FKA doses, employing 16S rRNA and metabolomics to explore the potential mechanism. Results : The findings indicated that FKA significantly inhibited the progression of colorectal cancer in C57 mice by modulating the composition of the gut microbiota. This modulation involved the suppression of endotoxin secretion by pathogenic bacteria and the concurrent augmentation of beneficial bacteria. Furthermore, in the context of metabolic pathways, FKA regulates lipid metabolism and arachidonic acid metabolism, thereby mitigating the inflammatory transformation associated with colorectal cancer. Conclusions : These findings provide valuable insights supporting the potential of FKA as a viable preventive strategy against CRC.
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INDUSTRIAL CROPS AND PRODUCTS
·
2026
·
IF 6.2
Qian Lin,Yupeng Fan,Yanliang Guo,Li Niu,Hanlin Guan,Wenhao Li,Huijun Zhang
Melon seed husk is an agricultural waste rich in lignocellulose, and its high-value utilization is of great significance for sustainable development. However, the recalcitrant structure of lignocellulose poses a major bottleneck to achieving efficient bioconversion. This study aims to elucidate the mechanism of efficient deconstruction of melon seed husk cellulose via synergistic pretreatment with electron beam irradiation (EBI) and a deep eutectic solvent (DES), and to develop a green biorefinery process. We applied synergistic pretreatment of melon seed husk using varying doses of EBI and choline chloride/urea DES. The structural evolution of the pretreated material was analyzed at multiple scales, and its saccharification efficiency was evaluated via enzymatic hydrolysis. The results revealed that EBI dose-dependently disrupted the hydrogen-bonding network and the crystalline structure of cellulose, reducing its crystallinity by 0.95 %–11.54 % and forming a porous network. The synergistic pretreatment exhibited a significant dose-threshold effect. At the optimized dose of 150 kGy, the cellulose-binding rate was significantly enhanced, resulting in a saccharification yield of 48.29 %. This study provides a theoretical foundation and a feasible strategy for the industrialization of green biomass refining.
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FOOD HYDROCOLLOIDS
·
2022
·
IF 11.504
Wei Liang,Wenqing Zhao,Xinyue Liu,Jiayu Zheng,Zhuangzhuang Sun,Xiangzhen Ge,Huishan Shen,Gulnazym Ospankulova,Marat Muratkhan,Wenhao Li
Aiming to investigate the role and mechanism of the effect of water on the structural, physicochemical, and in vitro digestible properties of starch during irradiation processing. This work used water pretreatment of sweet potato starch (12%, 25%, 50%, 75% and 100% water content) and then modification by E-beam (6, 12 and 24 kGy). The results showed that E-beam treatment preserved the polarization cross, growth rings, crystal types and FT-IR patterns of sweet potato starch. Also, E-beam induced the water molecule activation and free radical production, thus promoting starch degradation. Moreover, the short-range ordered structure, relative crystallinity, molecular weight, long-chain proportion, ΔH, viscosity and swelling power of starch decreased with increasing E-beam irradiation dose. In contrast, the short-chain proportion, solubility, and resistant starch content were improved. In addition, a synergistic effect was found between the water pretreatment and E-beam, i.e., the higher the water content of the starch, the deeper the modification by E-beam. Results obtained in this study can partially elucidate the role of water content in E-beam-modified starch and provide a basis for E-beam treatment of starch-based foods under different water levels.
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Molecular Catalysis
·
2023
·
IF 4.6
Shiwei Feng,Chengping Zhang,Hengdao Quan
As an environmentally friendly cleaning agent, Z -1-chloro-3,3,3-trifluoropropene (HCFO-1233zd( Z )) can realize industrial production by the isomerization of HCFO-1233zd( E ). Herein, various isomerization catalysts with different structures, compositions and acid properties were prepared through the fluorination of γ-Al 2 O 3 with CHF 3 by controlling the activation conditions. For the first time, the catalysts for HCFO-1233zd( E ) isomerization were systematically studied by XRD, N 2 physisorption, XPS, SEM, MAS NMR spectroscopy, NH 3 -TPD and py-IR. The active site of this reaction was revealed and the catalyst deactivation mechanism was proposed. It turned out that HCFO-1233zd( E ) isomerization prefers to occur at Lewis acid sites with moderate density and strength. The amorphous particles composed of γ-Al 2 O 3 , Al 2 O 3 (F) and α-AlF 3 ( R 3 ¯ c ) at 450 °C exhibit highly catalytic activity for HCFO-1233zd( E ) isomerization. After 100 h evaluation, it was found that residual γ-Al 2 O 3 can be fluorinated by HCFO-1233zd( E ) to form needle-like structures which could induce the amorphous Al 2 O 3 (F) particles to reorganize and give cubic structures, where the Lewis acid properties were enhanced, leading to catalyst deactivation.
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