JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Yi Yang Xu,Lei Meng,Miao Miao Zhao,Chu Xin Peng,Fei Yen
While all of the polymorphs of pure NH 4 I and KI are non-polar, we identify that (NH 4 ) 0.95 K 0.05 I is ferroelectric and (NH 4 ) 0.87 K 0.13 I and (NH 4 ) 0.83 K 0.17 I are pyroelectric through measurements of their pyroelectric current and complex dielectric constant. The order to disorder phase transitions occur near 245 K. Magnetic susceptibility measurements indicate that the proton orbitals of the NH 4 + continue to become ordered in the ground state in the (NH 4 ) 1–x K x I system up to x ≤ 0.17. The polar phases are proposed to stem from K + ions disrupting the symmetry of proton-orbital-lattice interactions between the NH 4 + and I – ions. Our work introduces a new pathway for the ordered phases of ammonium-based compounds to potentially become ferroelectric.
研究领域:
材料科学
·
凝聚态物理
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
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IF 6.2
Yijie Li,Shun Zeng,Weinong Zhang,Junbo He,Jiangtao Feng
Peach brown rot, caused by Monilinia fructigena (M. fructigena), is a destructive disease that affects peaches during pre- and postharvest stages. In this study, two 1-O-alkylglycerols (AKGs), namely, AKG-2 (1-O-dodecylglycerol) and AKG-4 (3-(2-ethylhexyloxy)propane-1,2-diol), demonstrated significant in vitro antifungal activity against M. fructigena, with EC50 values of 102 and 103 μg/mL, respectively. At a concentration of 200 μg/mL, both compounds effectively suppressed brown rot symptoms in inoculated peaches, achieving a protective efficacy of 93.2%. Mechanistic investigations revealed that AKG-2 and AKG-4 disrupted the surface morphology and internal ultrastructure of fungal hyphae, compromised the integrity of the cell membrane and nucleus, and reduced mitochondrial membrane potential. Moreover, treatment with these compounds induced the accumulation of reactive oxygen species, leading to elevated malondialdehyde levels and decreased activities of key antioxidant enzymes including superoxide dismutase and catalase. These results suggest that AKG-2 and AKG-4 exhibit antifungal effects through multiple synergistic mechanisms including membrane and nuclear damage, mitochondrial dysfunction, and oxidative stress induction. This study, for the first time, provides valuable mechanistic insights into the antifungal effects of AKGs and supports their potential as naturally derived fungicidal agents for the protection of peach fruits.
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PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
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IF 6.364
Xiaomeng Li,Xian Xue,Qiyin Lin,Zeming Qi,Hong Wang,Yingying Zhao,Jing Guo
Temperature stable xLi 2 MoO 4 -(1-x)(LiBi) 0.5 MoO 4 (x = 0, 40, 50, 60, 70, 100 vol%) microwave dielectric ceramics obtained by cold sintering process (CSP) under a mild sintering condition (120 ℃/30 min/200 MPa) are introduced in this work. The XRD , SEM, and Raman analysis indicate the coexistence of Li 2 MoO 4 and (LiBi) 0.5 MoO 4 phases. Li 2 MoO 4 -(LiBi) 0.5 MoO 4 ceramics are compatible with Ag and Al electrode materials under cold sintering condition. The specimens exhibit high relative densities and good microwave dielectric properties (relative permittivities: 31.5–5.5; Q×f values: 1900 - 18,500 GHz; TCF values: from +144 ppm/℃ to −106 ppm/℃), in particular, TCF = +0.7 ppm/℃ can be obtained in the case of x = 50 vol%. The extrapolated microwave dielectric properties obtained by the fitted infrared reflectivity spectrum are close to the measured data, revealing that the dielectric responses of cold sintered Li 2 MoO 4 -(LiBi) 0.5 MoO 4 ceramics in the microwave range are dominated by the polar optical phonons.
研究领域:
材料科学
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陶瓷
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微波工程
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固体物理
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DOI
高影响因子
JOURNAL OF ENTOMOLOGICAL SCIENCE
·
2024
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IF 0.7
Gao Wenjia,Dong Pei-Pei,Abduriyim Shamshidin,Wang Xiushuang
Licorice of the taxonomic genus Glycyrrhiza is a traditional Chinese medicinal plant. Its large-scale cultivation is threatened by insect pests, including the whitefly Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae). Our study (1) examined the preference of B. tabaci for G. uralensis Fischer ex de Candolle, G. glabra L., and G. inflata Batalin through caged trials; (2) identified the volatile organic compounds (VOCs) released by the three Glycyrrhiza species using headspace gas chromatography–mass spectrometry (HS-GC-MS); and (3) screened the olfactory behavior responses of B. tabaci to the key VOCs identified. The caged host preference trial showed that B. tabaci had a clear preference for G. uralensis over G. inflata and G. glabra . Through HS-GC-MS analysis, we identified 26, 33, and 31 VOCs from G. uralensis , G. glabra , and G. inflata , respectively. (3 Z )-Hexen-3-ene-1-yl acetate, trans -3-hexen-1-ol, cis -3-hexen-1-ol, 3-carene, and β-pinene were selected for further olfactory response assays on the basis of variable importance projection values and quantity differences. From these, we learned that cis -3-hexene-1-ol and trans -3-hexene-1-ol, abundant in G. uralensis , attract B. tabaci , whereas 3-carene and β-pinene, abundant in G. inflata , repel B. tabaci . The different VOCs from these three species of licorice may be primary factors affecting the preference for and feeding on cultivated licorice by B. tabaci . Our results will facilitate studies on the potential of using selected VOCs for managing B. tabaci , perhaps in push–pull strategies of their use against the pest.
研究领域:
植物学
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昆虫学
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农业科学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2020
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IF 4.495
Xiao-Juan He,Ling Li,Zhong-Shuai Xie,Yi-Chi Zhang,Ji Zhang,Zheng-Bin Gu,Haibo Zhang,Guoliang Yuan,Shan-Tao Zhang
Solid solution ceramics of (1- x )Sr 0.75 Ba 0.25 Nb 2 O 6 - x PbZr 0.52 Ti 0.48 O 3 ( x = 0−0.4) were prepared and investigated. The phase evolves from tungsten bronze for x = 0, coexisted tungsten bronze and pyrochlore at x = 0.3, to pyrochlore for x > 0.3. As the results, the ceramics show dramatically composition dependent microstructure and electrical property. The grain shape changes from anisotropic pillar-like with maximum length-diameter ratio of 3.3 at x = 0.2 to isotropic cubic-like for x > 0.2. At the same time, the maximum dielectric constant temperature tends to decrease with an exceptional increase at x = 0.3 due to the coexisted phases. Interestingly, the x = 0.3 ceramic endures ultrahigh breakdown strength of 340 kV/cm, which, together with enhanced polarization, results in maximum recoverable energy storage density of 3.0 J/cm 3 and energy storage efficiency of 81.5 % at room temperature.
研究领域:
材料科学
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电气工程
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DOI
高影响因子
Journal of Physical Chemistry C
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2018
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IF 4.484
Fengjiao Chen,Guoyong Fang,Zhipeng Yan,Yuexiao Pan,Jianbo Liu,Lin Wang
The cation structural changes of two 1-butyl-3-methylimidazolium halides, [BMIM]Cl and [BMIM]Br, are investigated by in situ Raman spectroscopy, infrared spectroscopy, and synchrotron X-ray diffraction as a function of hydrostatic pressure. The [BMIM]+ cations of [BMIM]Cl take the TT conformation under ambient conditions, undergo significant changes at 3.4 GPa, which is related to the potential formations of some new cation conformations, and take another conformation from 6.8 to 35.6 GPa. Correspondingly, crystalline [BMIM]Cl has a structure transition at 3.4 GPa, originating directly from the cation conformational changes. The [BMIM]+ cations totally transform into the GT conformer, if the diamond anvil cell-loaded sample is treated at 423 K for 12 h in a furnace before being cooled down to room temperature. It is the first time to observe the complete conformational transition from one conformer (TT) to another (GT) for the [BMIM]+ salts in experiments. The cations preserve the GT conformation as pressure reaches 44.6 GPa for heat-treated [BMIM]Cl. As a comparison, without and with the heat treatment, the [BMIM]+ cations of [BMIM]Br keep the GT conformation at high pressures up to 29.6 GPa, as it is a relatively stable state. Moreover, a notable photoluminescence emerges at high pressures over 20.0 GPa and is maintained in the decompression process, as a result of the pressure-induced polymerization of a small portion of the [BMIM]+ cations.
研究领域:
物理化学
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材料科学
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高压物理
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离子液体
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光谱学
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
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IF 5.876
Yi Zuo,Yu Chen,Tonghui Li,Jiaojiao Yu,Hong Yang,Min Liu,Xinwen Guo
A bulky composite material, CaCO 3 @TS-1, was synthesized in a tetrapropylammonium bromide hydrothermal system by adding nanosized CaCO 3 particles of 60–80 nm to a titanium silicalite-1 (TS-1) synthesis gel. The macroporous TS-1 free of extraframework Ti was then obtained by the posttreatment of the CaCO 3 @TS-1 in HCl solution to remove CaCO 3 and extraframework Ti simultaneously. This study demonstrates that this new synthesis route, the acidity posttreatment, can produce a bulky TS-1 with volume-controllable intracrystal macropores. The crystallization mechanism of the macroporous TS-1 was studied systematically. The addition of CaCO 3 accelerates the crystallization of silicon source, and leads to the similar crystallization rates of silicon and titanium sources. Therefore, the formation of extraframework Ti was inhibited, and more Ti ions were inserted into the TS-1 framework. The catalytic performance of macroporous TS-1 was evaluated in the hydroxylation of phenol . An outstanding catalytic activity was obtained due to their enhanced diffusion property and reduced extraframework Ti.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Xiuxiu Ren,Huan Yu,Meng Guo,Rong Xu,Jing Zhong
A long alkyl chain-containing organosilica layer obtained from 1, 8-bis(triethoxysilyl)octane (BTESO) was used to modify silicalite-1 membranes via a sol−gel method to obtain bi-layered BTESO/silicalite-1 composite membranes on macroporous α-Al 2 O 3 supports for the recovery of diluted ethanol by pervaporation . Silicalite-1 zeolite membranes were hydrothermally synthesized using two seeding methods: those prepared using wet−rubbing seeding method exhibited larger separation factors than those obtained using the dip−coating method in the pervaporation of ethanol/water due to the thinner seed layer in the former. After modified with BTESO, the surface became smoother and denser with higher hydrophobicity , and the thickness of BTESO layer was approximately 300 nm on both types of membranes. In pervaporation, two types of silicalite-1 membranes unexpectedly showed similar performances after BTESO modification. Ethanol flux increased or was maintained while water flux decreased greatly for silicalite-1 membranes after BTESO coating with increasing sol concentrations, and a higher separation factor was attained without sacrificing ethanol flux. The long alkyl chains in BTESO and silanols reacted with hydroxyl groups in silicalite-1 provided flexibility and hydrophobicity for ethanol transport with minor resistance. The optimized 2.0% BTESO/silicalite-1 membranes synthesized using wet−rubbing method showed a maximum flux of 6.84 kg m −2 h −1 and separation factor of 24.6 with overall pervaporation separation index of 161 in the pervaporation of 5.0 wt% ethanol/water mixture at 60 °C.
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DOI
高影响因子
ACS Earth and Space Chemistry
·
2022
·
IF 3.556
Shangying Li,Hongping He,Qi Tao,Peixin Du,Aiqing Chen,Yilin He,Jianxi Zhu
2:1 type layered aluminosilicates (LAs) such as beidellite, montmorillonite, and paragonite distribute widely in the various environments of the Earth, and they form commonly through the transformation of other minerals under hydrothermal or weathering conditions. Understanding the growth mechanisms of 2:1 type LAs during mineral transformation is of great importance for profoundly revealing their formation processes in the geological environments and a better understanding of the formation of crystal defects within minerals, however, which is not thoroughly revealed. In this study, the transformation of boehmite into 2:1 type LAs was successfully realized under hydrothermal conditions, and the growth mechanisms of 2:1 type LAs during such a mineral transformation were explored using spectroscopic and microscopic characterizations. The results indicated that layers of 2:1 type LAs preferentially extend in the a–b plane at the initial transformation stage and stack along the c-axis with the transformation proceeding. Additionally, some small primary nanoparticles of 2:1 type LAs occasionally attached to each other along the c-axis or in the a–b plane. This revealed that 2:1 type LAs that formed at the interfaces between precursor boehmite and additional amorphous Si mainly grew through the layer growth mechanism occasionally accompanied by the oriented attachment.
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高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Jinqiang Sun,Mengge Shang,Minna Zhang,Shimo Yu,Zhipeng Yuan,Xibin Yi,Serguei Filatov,Jing Zhang
Biomass aerogels are attractive in various applications owing to their inherent advantages of renewability, biodegradability and eco-friendly. Herein, a novel composite aerogel of konjac glucomannan (KGM)/TEMPO-oxidized cellulose nanofibers (TOCNF)@HKUST-1 (KTA@HKUST-1) is prepared through a facile vacuum impregnation method combined with the directional freeze-drying process, which using KGM and TOCNF as raw materials. The structural analyses disclose that the KTA@HKUST-1 has a hierarchical porosity, in which HKUST-1 can provide micropores for adsorption, while the meso -/macropores from KTA act as high-speed channels to improve diffusion and mass transfer rate to transport CO 2 components into the micropores of HKUST-1. The experiment results of KTA@HKUST-1-10 (KTA@H10) show that the CO 2 adsorption capacity can reach 3.50 mmol·g −1 at 1 bar and 298 K, and the adsorption capacity retention rate as high as 91.43% after 7 cycles. In addition, the CO 2 /N 2 adsorption selectivity of KTA@H10 can reach 18.42, which has an excellent potential for selective CO 2 adsorption.
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DOI
PubMed
高影响因子
FREE RADICAL BIOLOGY AND MEDICINE
·
2022
·
IF 8.101
Yangyang Tian,Zehe Ge,Miao Xu,Xin Ge,Mengjie Zhao,Fangshu Ding,Jianxing Yin,Xiuxing Wang,Yongping You,Zhumei Shi,Xu Qian
Radiotherapy is a standard-of-care treatment approach for glioblastoma (GBM) patients , but therapeutic resistance to radiotherapy remains a major challenge. Here we demonstrate that diallyl trisulfide (DATS) directly conjugates with cysteine (C) 32 and C35 (C32/35) residues of thioredoxin 1 (Trx1) through Michael addition reactions . Due to localizing in activity center of Trx1, the conjugation between DATS and C32/35 results in inhibition of Trx1 activity, therefore disturbing thioredoxin system and leading to accumulated levels of reactive oxygen species (ROS). High levels of Trx1 expression are correlated with poor prognosis of glioma patients. Notably, we reveal that DATS synergistically enhances irradiation (IR)-induced ROS accumulation, apoptosis , DNA damage, as well as inhibition of tumor growth of GBM cells. These findings highlight the potential benefits of DATS in sensitizing radiotherapy of GBM patients.
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DOI
PubMed
高影响因子
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2021
·
IF 3.575
Yongxin Li,Hua Huang,Xinshuai Zhang
1-Deoxy-D-sorbitol, the 1-deoxy analogue of D-sorbitol, has been detected in human urine as well as in natural herbs and spices. Although there are sporadic reports about 1-deoxy-D-sorbitol dehydrogenase, the complete catabolic pathway of 1-deoxy-D-sorbitol remains unsolved. Informed by the promiscuous activities of fructose-6-phosphate aldolase (FSA) which is involved in the sorbitol (glucitol) utilization ( gut ) operon and guided by the large scale bioinformatics analysis, we predicted and then experimentally verified the gut operon encoded by Bacillus licheniformis ATCC14580 is responsible for the catabolism of both D-sorbitol and 1-deoxy-D-sorbitol by in vitro activity assays of pathway enzymes , in vivo growth phenotypes, and transcriptomic studies. Moreover, the phylogenetic distribution analysis suggests that the D-sorbitol and 1-deoxy-D-sorbitol catabolic gene cluster is mostly conserved in members of Firmicutes phylum.
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产品关联
DOI
PubMed
高影响因子
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