SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Yanna Lin,Xueying Wang,Yuanling Sun,Yuxue Dai,Weiyan Sun,Xiaodong Zhu,Hao Liu,Rui Han,Dandan Gao,Chuannan Luo
In this work, target-responsive DNA hydrogel with high loading and good biocompatibility was used to construct chemiluminescent biosensor for specific detection of adenosine. Acrydite-modified adenosine aptamer (Acry-A-Apt), acrydite-modified single-strand DNA (Acry-ssDNA) and hemin aptamer (H-Apt) were used to prepared the DNA hydrogel, and the three single-strand DNA were partially complementary to each other. Thus, the DNA hydrogel only dissolved when adenosine and hemin were present simultaneously. HKUST-1 is a Cu-based MOFs with peroxidase-like activity. Au NPs were coated into cavities of HKUST-1 to obtain [email protected] , and the [email protected] had a stronger peroxidase-like activity than HKUST-1. [email protected] was coated in the DNA hydrogel. When only hemin was present, hemin bound to the H-Apt to form the G-quadruplex/hemin and the DNA hydrogel remained in the gel state. Therefore, the G-quadruplex/hemin was formed in the hydrogel and the excess hemin can be removed, avoiding background signal interference. Adenosine was then added and the preferential interaction between adenosine and adenosine aptamer resulted in complete dissolution of the DNA hydrogel. Subsequently, G-quadruplex/hemin and [email protected] were released simultaneously, enabling dual signal amplification of chemiluminescent biosensor, yielding a “signal on” readout. As a result, the biosensor could quantify adenosine from 4 × 10 −13 – 1.5 × 10 -10 mol/L with a detection limit as low as 1.04 × 10 −13 mol/L. The DNA hydrogel system provides a simple, sensitive and biocompatible method for the detection of adenosine which is useful in the field of biotechnology.
研究领域:
生物技术
·
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
Frontiers in Materials
·
2020
·
IF 2.705
Li Xinxi,Liu Long,Li Shumin,Guo Lin,Li Bin,Zhang Guoqing
Spinel lithium manganese oxide (LiMn2O4) based Li-ion battery (LIB) is attractive for hybrid/full electric vehicles because of its abundant resources and easy preparation. However, operation under an elevated temperature could cause severe capacity fading of the spinel cathodes. In this work, 1, 3-propane sultone (PS) is investigated as an electrolyte additive for improving the cyclability of the LiMn2O4/graphite LIB at elevated temperature. The charge and discharge measurement proves that PS can significantly enhance the cyclability of 053048-type LiMn2O4/graphite pouch cell at 60°C. Compared to the cell without additive, the capacity retention of the cell using electrolyte with 5% PS increases from 52 to 71% after 180 cycles. The improved cyclability is attributable to the modification of the solid electrolyte interface (SEI) on both positive and negative sides of the LiMn2O4/graphite cell by PS, which effectively prevents anode and cathode from structural breakdown and inhibits the electrolyte decomposition.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 32
·10630-10634
·
IF 4.029
Mei-Yan Gao,Shumei Chen,Lan-Xia Hu,Lei Zhang,Jian Zhang
Four titanium-oxo-clusters with cyclohex-3-ene-1-carboxylate (Cec) ligands, Ti6(μ2-O)2(μ3-O)2(Cec)4(OiPr)12 (PTC-91; HOiPr = isopropanol), Ti6(μ3-O)6(Cec)6(OiPr)6 (PTC-92 and PTC-93) and H2[Ti18(μ2-O)11(μ3-O)14(Cec)20(OiPr)4] (PTC-94), have been solvothermally synthesized under different conditions, respectively. These clusters with the same Cec ligand show totally different structures, and they are stable in water and other common solvents. The Ti6 clusters with different conformations are presented in PTC-91, PTC-92 and PTC-93, while PTC-94 is an unusual Ti18 cluster. The photocatalytic studies reveal that PTC-91 and PTC-94 have good H2 evolution ability.
研究领域:
材料化学
·
光催化
✓ 已验证
DOI
高影响因子
Agronomy-Basel
·
2022
·Vol. 13
·期 1
·46
·
IF 3.949
Han Yan,Rui Wang,Ning Ji,Jiangkuo Li,Chao Ma,Jiqing Lei,Liangjie Ba,Guangzhong Wen,Xiaobo Long
In order to study a short-term and efficient technology by 1-methylcyclopropene (1-MCP) in blueberry, the fruit was treated with 0, 0.5, 1 and 3 μL/L 1-MCP for 2 h then stored at 25 ± 1 °C with 40–50% relative humidity (RH) for 9 d. The weight loss, decay incidence, respiration rate, firmness, soluble solid content (SSC), titratable acid (TA), Brix-acid ratio (BAR), sensory evaluation, content of cell wall polysaccharide, activities of cell wall composition-related enzymes and energy metabolism in blueberry were determined during shelf life. The results showed that the weight loss, decay incidence and respiration rate were reduced by 3 μL/L 1-MCP treatment. Compared to other groups, the firmness, the content of TA and anthocyanins were maintained in 3 μL/L 1-MCP-treated blueberry. In contrast, the SSC and BAR were lower compared to those untreated. However, the sensory evaluation of “taste” and “aroma” value showed no differences in all fruits. The content of protopectin, cellulose and hemicellulose was higher in 1-MCP-treated blueberry, accompanied by a decrease in polygalacturonase (PG) and pectin methyl esterase (PME) activity. The content of water-soluble pectin (WSP) was lower in 1-MCP-treated blueberry than untreated ones. The activity of phenylalanine ammonia lyase (PAL), peroxidase (POD), cinnamyl alcohol dehydrogenase (CAD) and 4-coumarate-CoA ligase (4CL) was higher in 1-MCP-treated blueberry than the untreated, which induced more serious lignification. The results of energy metabolism also showed that the 1-MCP treatment could ensure sufficient intracellular energy supply. The 3 μL/L 1-MCP treatment could maintain the shelf quality and retard decomposition of cell wall polysaccharide by ensuring sufficient intracellular energy supply and inhibiting cell wall-degrading enzymes activity. Taken together, this study highlighted an efficient and short-term 1-MCP treatment technique.Keywords:blueberry;1-MCP;cell wall polysaccharide;shelf life;karst fruit
研究领域:
植物生理学
·
食品科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2014
·
IF 1.552
Zhongkui Zhao,Renzhi Li,Yu Li
A clean and highly efficient synthesis of 1-amino-2-acetylanthraquinone via reductive isoxazole ring cleavage of 3-methylanthra[1,2- c ]isoxazole-6,11-dione catalyzed by trace copper using hydrazine hydrate as a clean reducing agent and water as a green reaction medium under mild reaction conditions was investigated. Various transition-metal catalysts were screened for the reductive ring-opening reaction, and Cu(NO 3 ) 2 was shown to be an excellent catalyst. A conversion of 97.2% and 1-amino-2-acetylanthraquinone selectivity greater than 95% were obtained in the presence of 2.6 mol% Cu(NO 3 ) 2 (turnover number 38) with 1.3 equiv. of hydrazine hydrate for 2 h in water. The structure of the product was confirmed by 1 H nuclear magnetic resonance spectroscopy and mass spectrometry ; the main byproduct was hydroxyl-substituted 1-amino-2-acetylanthraquinone. A possible reaction mechanism for the copper-catalyzed ring cleavage of 3-methylanthra[1,2- c ]isoxazole-6,11-dione with hydrazine hydrate was proposed.
研究领域:
有机化学
·
环境化学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 22
·期 5
·945-954
·
IF 3.382
Lanjian Xu,Yangyang Yuan,Jie Zhang,Yanfei Zhang,Xiaomin Zhang,Lei Chen,Lei Xu
A green, cost-effective and facile steam-assisted crystallization (SAC) strategy was developed to synthesize core–shell-structured zeolite composites with different frameworks between the core and shell. Chemical incompatibility from different structures has been circumvented by dip-coating Silicalite-1 seeds and an in situ transformation process. Beta@Silicalite-1 zeolites with a nanoscale polycrystal Silicalite-1 shell wrapped around the monocrystal Beta core was synthesized. The crystallization process and synthetic parameters, such as the composition of the core, crystallization temperature and gel composition of the seed solution, were investigated. The results revealed the importance of stability of the core and the crystallization rate of the Silicalite-1 shell. Interestingly, a trace amount of aluminum in the core zeolite could help resist corrosion during crystallization. Further investigation on alkylation and etherification reactions over Beta@Silicalite-1 demonstrated the advantage in selectivity control toward self-etherification versus alkylation.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
DOI
高影响因子
MONATSHEFTE FUR CHEMIE
·
2024
·Vol. 155
·期 7
·731-738
·
IF 1.7
Shi Huibing,Wang Peng,Yan Yaozong,Yang Guiai,Wu Haigang
Rh-catalyzed tandem hydroformylation/isomerization/hydrogenation of various 1-arylbutadienes toward the corresponding branched saturated aldehydes were performed in the presence of monodentate phosphine ligand PPh 3 . After investigating different reaction parameters such as P-ligands and solvents, the conversion of substrates (including electron withdrawing and electron donating groups on aromatic rings, up to 99%) and chemical/regioselectivity of the target products (up to 98% and 99/1 for B/L) were improved using DMF as solvent. The [Rh(cod)Cl] 2 /PPh 3 catalytic system had good substrate universality in terms of substituents on the phenyl ring and provided a simple synthesis method for branched saturated aldehydes. Graphical abstract
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 25
·1-13
·
IF 2.8
Yang Xiao-Yu,Yan Meng-Han,Zhang Ying,Zhang Zhi-Fei,Chen Xue-Shuai,Joshi Mahesh Kumar,Li Zi-Liang,Li Peng,Han Wei-Fang,Fu Peng
In this study, a series of perovskite-phase x LaCoO 3 -(1 − x )CaCu 3 Ti 4 O 12 [ x LC-(1 − x )CCTO, with x = 0.02, 0.04, 0.08, 0.15] negative temperature coefficient (NTC) ceramics were fabricated by a solid-state reaction method. XRD analysis indicated that the ceramics consisted of a body-centered cubic perovskite phase. The grain size of the prepared samples was greatly decreased by introducing LC. The decrease in resistivity of all samples as a function of temperature indicated the presence of NTC effect in all the fabricated x LC-(1 − x )CCTO ceramics. The electrical resistivity ρ 30 decreased within a relatively narrow range of 1.58 × 10 6 − 9.28 × 10 5 Ω cm with increasing LC content, whereas thermistor constant B 30/75 increased within a wide range of 2190–5232 K. Our outcomes confirmed that the combination of ρ 30 and B 30/75 could be adjusted to desired values by incorporating LC. In addition, in situ XPS and complex impedance analysis displayed a conduction mechanism based on electron hopping. Current research provided a feasible example to achieve the suitable coupling of high ρ and low B values for NTC thermistors.
✓ 已验证
产品关联
DOI
高影响因子
Communications Biology
·
2023
·Vol. 6
·期 1
·1-13
·
IF 5.9
Sun Weijia,Li Yuheng,Li Jianwei,Tan Yingjun,Yuan Xinxin,Meng Haoye,Ye Jianting,Zhong Guohui,Jin XiaoYan,Liu Zizhong,Du Ruikai,Xing Wenjuan,Zhao Dingsheng,Song Jinping,Li Youyou,Pan Junjie,Zhao Yunzhang,Li Qi,Wang Aiyuan,Ling Shukuan,Dai Rongji,Li Yingxian
Mechanical force loading is essential for maintaining bone homeostasis, and unloading exposure can lead to bone loss. Osteoclasts are the only bone resorbing cells and play a crucial role in bone remodeling. The molecular mechanisms underlying mechanical stimulation-induced changes in osteoclast function remain to be fully elucidated. Our previous research found Ca 2+ -activated Cl − channel Anoctamin 1 (Ano1) was an essential regulator for osteoclast function. Here, we report that Ano1 mediates osteoclast responses to mechanical stimulation. In vitro, osteoclast activities are obviously affected by mechanical stress, which is accompanied by the changes of Ano1 levels, intracellular Cl − concentration and Ca 2+ downstream signaling. Ano1 knockout or calcium binding mutants blunts the response of osteoclast to mechanical stimulation. In vivo, Ano1 knockout in osteoclast blunts loading induced osteoclast inhibition and unloading induced bone loss and. These results demonstrate that Ano1 plays an important role in mechanical stimulation induced osteoclast activity changes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2024
·
IF 2.3
Yin Pengyu,Nie Jiayuan,Wen Xiangyu,Li Zhihui,Zhang Dongsheng,Zhao Xinqiang,Wang Yanji
ε-Caprolactam (CPL) is an important organic chemical raw material used as a monomer in the production of nylon 6. The traditional production process employs fuming sulfuric acid as a catalyst, leading to serious equipment corrosion and environmental pollution. While vapor-phase Beckman rearrangement reaction offers a solution to these issues. Unfortunately, the catalyst used is susceptible to carbon deposition and deactivation during the vapor-phase Beckman rearrangement process. Herein, a kind of mixed acid-modified hollow TS-1 zeolite was prepared in this study. It is a hollow structure of TS-1 zeolite formed by secondary crystallization, which is conducive to the shortening of the reaction path and the improvement of the anti-carbon accumulation performance. Further investigation revealed that modification of the hollow TS-1 zeolite with mixed acids facilitates the removal of non-skeletal titanium, and reduces the amount of Lewis acid in the catalyst, thereby improving its catalytic performance. Under optimal conditions, the cyclohexanone oxime (CHO) conversion rate reached 100%, with a caprolactam selectivity exceeding 98%. Notably, the catalytic activity of the catalyst remained stable after 500 h of continuous operation. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 52
·27259-27266
·
IF 3.708
Libin Yang,Feng Xin,Junzhong Lin,Zhuang Zhuang,Rui Sun
In this study, a hydrothermal synthesis was developed to prepare a thin titanium silicalite-1 catalyst layer in the internal channels of the honeycomb cordierite support, which was used in a continuous heterogeneous reaction. The as-prepared thin TS-1 catalyst layer was characterized by SEM, XRD, UV-vis and ATR-FTIR methods. Multiple hydrothermal syntheses were used for controlling the crystalline growth to optimize catalytic activity and lifetime. Moreover, a monolithic TS-1/cordierite reactor with external looping was utilized to investigate the characteristics of the continuous heterogeneous ammoximation reaction without the organic solvent tert-butanol (TBA). The reaction results showed that the conversion of cyclohexanone and selectivity of oxime approached more than 0.96 and 0.98, respectively. When compared with the reaction using TBA as the reaction solvent, the activity of the monolithic TS-1/cordierite showed no differences except for a longer lifetime.
研究领域:
化学工程
·
催化化学
·
材料科学
·
工业化学
·
绿色化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Huanxu Teng,Meihua Zhu,Yixuan Shao,Siqi Shao,Qingsheng Wu,Ziming Li,Xiangshu Chen,Hidetoshi Kita
Supported TS-1 zeolites were successfully synthesized on α-Al 2 O 3 microsphere by secondary hydrothermal synthesis, which were placed in the fixed-bed reactor and catalyzed the oxidation of isopropanol(IPA) with hydrogen peroxide. Effects of synthesis parameters on the morphology and catalytic activity of the supported TS-1 zeolites were systematically studied in this work. Size of α-Al 2 O 3 microsphere, and crystallization temperature could determine the coverage, titanium coordination, and titanium content of the supported TS-1 zeolites. When the crystallization temperature and H 2 O/SiO 2 molar ratio of the initial synthesis solution were 150 °C and 120, the titanium-rich and anatase-free supported TS-1 zeolites were prepared on the ca. 1 mm α-Al 2 O 3 microsphere support. The supported TS-1 zeolites showed an excellent catalytic performance and stability for isopropanol oxidation, the isopropanol conversion and acetone selectivity reached 100 % within 2 h. Kinetic studies showed that the reaction conformed to the Langmuir-Hinshelwood mechanism and that the apparent activation energy was only 4.57 kJ/mol.
研究领域:
催化化学
·
材料化学
·
化学工程
·
多相催化
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）