JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2024
·
IF 5.7
Jinye Huang,Xuan Xuan,Dongmei Xu,Yuezhong Wen
The regulation solutions and mechanisms of reducing pesticide phytotoxicity to nontarget plants are not well-defined and detailed. Here, we have proposed a new detoxification strategy to control the toxic effects of herbicide imazethapyr (IM) induced in wheat seedlings from the perspective of the plasma membrane (PM) H+-ATPase. We found that the changes in PM H+-ATPase activity have a regulatory effect on the phytotoxic effects induced by IM in plants. Treatment with PM H+-ATPase activators restored the reduced auxin content and photosynthetic efficiency caused by IM, thereby promoting plant growth. Application of a PM H+-ATPase inhibitor further reduced phosphorus content and significantly increased 2,4-dihydroxy-7-methoxy-2H,1,4-benzoxazin-3(4H)one (DIMBOA) and jasmonic acid levels. These effects indicate that auxin and DIMBOA may regulate plant growth trends and detoxification effects mediated by PM H+-ATPase. This work opens a new strategy for regulating herbicide toxicity to nontarget plants from the PM H+-ATPase.
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高影响因子
MACROMOLECULES
·
2024
·
IF 5.1
Liwei Lu,Jianben Xu,Jiongchao Li,Yuedong Xing,Zhongqun Zhou,Faai Zhang
High-performance elastomers that possess a combination of high mechanical toughness and fast healability have garnered extensive interest because of their diverse application potential. Inspired by the unique multiple hydrogen bond (H-bond) structure of spider silk and the rapid dynamic exchange of hindered urea bonds (HUBs), a self-healing polyurea elastomer with ultrahigh toughness was designed by incorporating dynamic sextuple H-bonds and HUBs into the polymer chain. Such a design affords high stretchability (1586%), excellent toughness (45.53 MJ m–3), good self-healing efficiency (91.6%), fracture energy (39.68 kJ m–2), and recyclability. The high mechanical performance and good healability are attributed to the presence of reversibly cross-linked noncovalent sextuple H-bonds and dynamically covalent HUBs, which have been validated by stress relaxation tests. Meanwhile, by substituting the chain extender adipic dihydrazide with hexamethylenediamine, which possesses a comparable structure but fewer amide bonds, the effect of sextuple H-bonds on elastomers was confirmed. More importantly, when a conductive layer of graphene oxide was applied to the surface of the resulting elastomer, the elastomers exhibited potential applications in strain sensors.
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Bioresources and Bioprocessing
·
2024
·Vol. 11
·期 1
·1-10
·
IF 4.3
Wang Cong,Chang Dongdong,Zhang Qi,Yu Zhisheng
Lignocellulose pretreated using pyrolysis can yield clean energy (such as bioethanol) via microbial fermentation, which can significantly contribute to waste recycling, environmental protection, and energy security. However, the acids, aldehydes, and phenols present in bio-oil with inhibitory effects on microorganisms compromise the downstream utilization and conversion of lignocellulosic pyrolysates. In this study, we constructed a microbial electrolysis cell system for bio-oil detoxification and efficient ethanol production using evolved Escherichia coli to overcome the bioethanol production and utilization challenges highlighted in previous studies. In electrically treated bio-oil media, the E. coli-H strain exhibited significantly higher levoglucosan consumption and ethanol production capacities compared with the control. In undetoxified bio-oil media containing 1.0% (w/v) levoglucosan, E. coli-H produced 0.54 g ethanol/g levoglucosan, reaching 94% of the theoretical yield. Our findings will contribute to developing a practical method for bioethanol production from lignocellulosic substrates, and provide a scientific basis and technical demonstration for its industrialized application.
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JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2011
·Vol. 49
·期 12
·2755-2760
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IF 3.894
Jing Xu,Yuhong Ma,Jingyi Xie,F.J. Xu,Wantai Yang
A universal photoassisted pathway to functionalize polymeric surfaces is presented by transferring the inert surface sp 3 C H bonds into reactive groups, such as SO 3 H, NH 2 , SH, and COOH. The proposed method uses acetone as photoinitiator and different phenols with a para substituent XR as the reactants. Acetone excited by UV irradiation acts as a pair of scissors cutting both the surface C H bonds of the polymer substrate and the O H bonds of phenol, leading to the formation of carbon-centered surface chain free radicals and oxygen-centered phenoxy free radicals. By coupling of these two radicals, a variety of functional X groups with an R spacer from XR species of different phenol reactants were readily bonded to the polymeric surfaces, where phenol reactants included 4-hydroxylbenzene sulfonic acid for SO 3 H, p -aminophenol and tyramine for NH 2 , 4-hydroxythiophenol for SH, and tyrosine for COOH. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 47
·e56255
·
IF 2.7
Jin Yang,Yixuan Hou,Yingzheng Hong,Yingbang Yao
Since thermally conductive fillers easily aggregate when introduced into polymer matrix, it is essential to apply a modifier to enhance the dispersion of the filler. In current study, the surface of boron nitride (h-BN) is firstly modified by employing a double modification process and then added into sulfonated polyetheretherketone (SPEEK) to form the composite materials. Four different kinds of samples of double-modified h-BN were obtained. Ultimately, the XXX@h-BN/SPEEK (XXX denoted as modifier, i.e. PDA, VTMS, TEOS, and APS) flexible film with the horizontally oriented XXX@h-BN was produced by heating the mixture under an external electric field. The test results indicate that the thermally conductive filler PDA@h-BN (PDA: polydopamine), which was prepared by modifying OH@h-BN with PDA, loaded into SPEEK, and electrically oriented, shows the best overall performances. With a high tensile strength of 43.24 MPa and good flexibility, PDA@h-BN/SPEEK flexible film exhibits an in-plane thermal conductivity of 2.3 Wm −1 K −1 at a filling ratio of 10 wt%. The sample may be bent at a steep angle without breaking down and can recover to original shape bearing its high degree of flexibility.
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Journal of the American Chemical Society
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2024
·
IF 14.4
Liu Lin,Yunming Xu,Yiting Han,Ruikun Xu,Tongyue Wang,Zemin Sun,Zhenhua Yan
A deep understanding of the mechanism for the spin-magnetic effect on O–H cleavage is crucial for the development of new catalysts for water oxidation. Herein, we designed and synthesized the crystalline Fe-DABDT and Co-DABDT (DABDT = 2,5-diaminobenzene-1,4-dithiol) and optimized an effective magnetic moment to explore the role of the spin-magnetic effect in the regulation of water oxidation activity. It can be found that the OER activity of the catalyst is positively correlated with its effective magnetic moment. Under the external magnetic field, Fe-DABDT with more spin single electrons has a stronger spin-magnetic response to water oxidation than Fe/Co-DABDT and Co-DABDT. The increase in OER current of Fe-DABDT is nearly 2 times higher than that of Co-DABDT. Experimental and density functional theory studies show that magnetized Fe sites could realize nucleophilic reaction, accelerate the polarization of electron spin states, and promote the polar decomposition of O–H and the formation of the O–O bond. This study provides mechanistic insight into the spin-magnetic effect of oxygen evolution reaction and further understanding of the spin origin of catalytic activity, which is expected to improve the energy efficiency of hydrogen production.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 8
·3573-3580
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IF 2.7
Ruidong Li,Bo Zhao,Ganggang Chang,Shanchao Ke,Minjie Chen,Didi Dong,Chun Pu,Xiaoyu Yang
In the current investigation, the base-metal hollow multifunctional catalyst, Pd–IL@H-UiO-66-NH2, was fabricated utilizing a hydrothermal method followed by etching and supporting processes. The results of the effort demonstrate that Pd–IL@H-UiO-66-NH2 displays significantly enhanced activity and product selectivity in catalysis of the one-pot Knoevenagel condensation–hydrogenation reaction, as well as a high level of generality in promoting hydrogenation reactions of unsaturated hydrocarbons. The excellent properties of Pd–IL@H-UiO-66-NH2 are ascribed to its rationally designed spatial distribution of catalytically active sites within its hierarchical structure, which is comprised of surface wrinkles that increase hydrophobicity and exposure of the active sites, and hollow structures that serve as nanoreactors to enrich substrate interactions and improve mass transfer. Furthermore, the catalytic stability of Pd–IL@H-UiO-66-NH2 was shown to be largely maintained after its use in five successive catalytic cycles. The stability of the new tandem catalyst benefits from strong confinement effects associated with its hollow structure and electronic interactions between the Pd and ILs that effectively restrict leaching and aggregation of Pd nanoparticles (NPs).
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 18
·9016
·
IF 4.9
Xiulin Zhang,Yang He,Xiaolu Zhang,Ziyi Liang,Wendong Wang,Zhenyu Da,Jianyi Lv,Meng Guo,Xueyun Huo,Xin Liu,Jing Lu,Lixue Cao,Xiaoyan Du,Zhongming Ge,Zhenwen Chen,Xuancheng Lu,Jianzhong Zhang,Changlong Li
Helicobacter pylori(H. pylori) is a well-known pathogen associated with chronic gastric infection, progressing from gastritis to gastric adenocarcinoma, but the dynamic phenotypic and molecular characteristics of gastric epithelial cells during sustained infection remain unclear. We established a chronic infection model using the human gastric epithelial cell line GES-1, exposed toH. pylorior its lysate across 30 generations, dynamically assessing cell proliferation, migration, invasion, apoptosis, autophagy, and epithelial–mesenchymal transition (EMT) markers, with RNA sequencing for transcriptomic changes and a Mongolian gerbil model to validate chronic pathological progression. AcuteH. pyloriexposure induced pronounced morphological changes; suppressed proliferation, migration, and invasion; triggered apoptosis; and blocked autophagic flux, while long-term stimulation reversed these effects. EMT markers showed progressive loss of epithelial characteristics with chronic infection. RNA sequencing revealed a dynamic shift from inflammation-driven apoptosis to adaptive survival mechanisms. In vivo, prolonged infection induced dynamic TLR expression alongside progressive gastric pathology, including atrophy and dysplasia. Our study provides new molecular evidence for dynamic cellular and immunological adaptations of gastric epithelial cells under chronicH. pyloriinfection, highlighting critical intervention windows for preventing gastric carcinogenesis.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2014
·Vol. 28
·期 9
·673-677
·
IF 2.017
Limin Ren,Wenyi Chu,Dinghui Guan,Yanjun Hou,Man Wang,Xiaobin Yuan,Zhizhong Sun
A simple and efficient route for the preparation of terphenyl derivatives via palladium-catalyzed sequential directed C―H arylation/Suzuki–Miyaura cross-coupling in ‘one-pot’ has been developed. 4,4′-(Cyclohexane-1,1-diyl)diphenol is an essential ligand. This reaction can tolerate a series of functional groups and provides the terphenyl derivatives in moderate to good yield. Copyright © 2014 John Wiley & Sons, Ltd.
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高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yunzi Li,Fei Chen,Xiaoyu Li,Qiang Shen,Lianmeng Zhang
Ceramic/metal composites, as high-temperature structural materials, have limited applications because of their poor machinability . AlN/Mo/Mo 2 B machinable composites were fabricated by adding h-BN to AlN/Mo composites by plasma-activated sintering at various temperatures and at an axial pressure of 30 MPa under argon atmosphere. The sample sintered at 1500 °C exhibited excellent machinability for cemented carbide tools, with a bending strength of approximately 500 MPa and a Vickers hardness value of 9.34 GPa. The effects of sintering temperature on the microstructure, mechanical properties, and machinability were investigated, and the reactions introduced by adding h-BN were studied. These reactions reinforced the composite and newly introduced a Mo 2 B phase, which showed better ability to deflect cracks and prevent them from moving deep inside the composite, thus improving its machinability. This research provides a possible solution for improving the machinability of ceramic/metal composites without sacrificing the strength .
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Journal of Energy Chemistry
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2020
·
IF 7.216
Libin Wang,Ting Shu,Songtao Guo,Shi Chen,Yingjun Jiang,Xianluo Hu
ABSTRACT Owing to sluggish ionic mobility at low temperatures, supercapacitors , as well as other energy-storage devices, always suffer from severe capacity decay and even failure under extreme low-temperature circumstances. Solar-thermal-enabled self-heating promises an attractive approach to overcome this issue. Here, we report a unique H-bonding charge-transfer complex with a high photothermal conversion efficiency of 79.5% at 405 nm based on chloranilic acid and albendazole . Integrated with a microsupercapacitor, the chloranilic acid-albendazole complex (CAC) film prompts an apparent temperature increase of 22.7 °C under 1 sun illumination at −32.6 °C, effectively elevating the working temperature of devices. As a result, the rate capability of the microsupercapacitor has been significantly improved with a 17-fold increase in capacitance at a current density of 60 μA cm −2 , leading to outstanding low-temperature performances. Importantly, the integrated device is capable of working at a low temperature of −30 °C in the open air, which demonstrates the potential of CAC in practical applications for low-temperature ultracapacitive energy-storage devices.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Mengwei Han,Yuzhu Qian,Xinni Li,Nailiang Wang,Ting Song,Li Liu,Xianyou Wang,Xiongwei Wu,Man-Kay Law,Bei Long
Developing insertion-type anode is key to advancing “rocking chair” zinc-ion batteries, though there are few reported insertion-type anodes. Herein, the Bi 2 O 2 CO 3 is a high-potential anode, with a special layered structure. A one-step hydrothermal method was used to prepare Ni-doped Bi 2 O 2 CO 3 nanosheet , and also a free-standing electrode consisting of Ni-Bi 2 O 2 CO 3 and CNTs was designed. Both cross-linked CNTs conductive networks and Ni doping improve charge transfer. Ex situ tests (XRD, XPS, TEM, etc.) reveal the H + /Zn 2+ co-insertion mechanism of Bi 2 O 2 CO 3 and that Ni doping improves its electrochemical reversibility and structural stability. Therefore, this optimized electrode offers a high specific capacity of 159 mAh g −1 at 100 mA g −1 , a suitable average discharge voltage of ≈0.400 V, and a long-term cycling stability of 2200 cycles at 700 mA g −1 . Besides, the Ni-Bi 2 O 2 CO 3 //MnO 2 “rocking chair” zinc-ion battery (based on the total mass of cathode and anode) delivers a high capacity of ≈100 mAh g −1 at 50.0 mA g −1 . This work provides a reference for designing high-performance anode in zinc-ion batteries.
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