JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 13
·47291
·
IF 1.901
Zhen Jia,Jinggang Wang,Liyuan Sun,Fei Liu,Jin Zhu,Xiaoqing Liu
A series of poly(propylene- co -1,4-cyclohexanedimethylene 2,5-furandicarboxylate)s (PPCFs) with different compositions were synthesized from bio-based aromatic monomer 2,5-furandicarboxylic acid and 1,3-propanediol (PDO), along with 1,4-cyclohexanedimethylene (CHDM). The chemical structure, composition, and sequence distribution of PPCFs were determined by nuclear magnetic resonance ( 1 H NMR and 13 C NMR). Results showed that the compositions of copolyesters depended on the feed molar ratio of PDO and CHDM, and all the obtained PPCFs copolyesters had triad component in a random sequential structure. With the addition of CHDM, the gas barrier properties of poly(propylene 2,5-furandicarboxylate) (PPF) deteriorated. However, when the content of CHDM reached 79%, PPCF79 still showed the CO 2 and O 2 barrier improvement factor of 4.5 and 3.25, respectively, which were better than those of poly(ethylene naphthalate), a well-known polymer with barrier property. Besides, PPCF79 showed good performance on tensile modulus, tensile strength, elongation at break, and the crystallization enthalpy was improved from 3.2 J g −1 for PPF to 30.7 J g −1 for PPCF79. It has the potential to serve as a promising bio-based polymer with excellent comprehensive performance. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47291.
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高影响因子
CARBON
·
2019
·
IF 7.466
Weiguang Fang,Haibo Hu,Tongtong Jiang,Guang Li,Mingzai Wu
A novel 3D composites comprising in-situ formed Co Ni bimetallic sulfides particles (Co Ni S@NSPC) embedded in N, S-doped porous carbon was facilely constructed for the air cathode catalyst for Zn-air batteries. The synergistic interplay between N, S doped carbon matrix, the porous structure and the highly catalytic active cobalt nickel sulfides species contributes greatly to the excellent bifunctional catalytic activity both in the ORR and OER in 0.1 M KOH solution for the Co Ni S@NSPC catalyst. The ORR measurement results showed that the half-wave potential (0.82 V vs. RHE), current density (5.23 mA cm −2 at 0.2 V vs. RHE) of our sample were very close to that of Pt/C (0.82 V, 5.17 mA cm −2 ), meanwhile its stability and methanol tolerance were superior to Pt/C. The OER measurement results showed that the Co Ni S@NSPC catalyst exhibited a small overpotential (0.47 V vs. RHE) at 10 mA cm −2 , close to that of RuO 2 (0.39 V). Importantly, compared to the mixture of Pt/C and RuO 2 cathodes, the rechargeable Zn-air battery based on Co Ni S@NSPC cathode exhibits smaller discharge/charge overpotential (0.85 V), higher power density (51.6 mW cm −2 ), higher voltaic efficiency (58.5%) at 10 mA cm −2 and an improved cycling stability over 3600 min.
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ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY
·
2018
·Vol. 99
·期 4
·e21512
·
IF 1.316
Guang-Wei Li,Xiu-Lin Chen,Xiang-Li Xu,Jun-Xiang Wu
Insect antennae have a primary function of perceiving and discerning odorant molecules including sex pheromones and host plant volatiles. The assumption that genes highly expressed in the antennae may have an olfactory-related role associated with signal transduction. Here, one delta subfamily glutathione S -transferase (GST) gene (GmolGSTD1) was obtained from an antennal transcriptome of Grapholita molesta . Quantitative real-time polymerase chain reaction results revealed that GmolGSTD1 was mainly expressed in antennae and the expression levels were significantly higher in female antennae than in male antennae. The recombinant GmolGSTD1 (rGmolGSTD1) showed glutathione-conjugating activity toward 1-chloro-2,4-dinitrobenzene (CDNB) as substrates. The pH range for optimal rGmolGSTD1 enzyme activity was 6.0–6.5, and rGmolGSTD1 enzyme activity had maximal peaks at 35–40°C. Spectrophotometric analysis indicated that insecticides had weak inhibitory effects on the activity of rGmolGSTD1 with the inhibitory rates of 28.82% for chlorpyrifos, 22.27% for lambda-cyhalothrin, 18.07% for bifenthrin, 20.42% for acetamiprid, 17.57% for thiamethoxam, 25.67% for metaflumizone, 27.43% for abamectin, and 7.24% for chlorbenzuron. rGmolGSTD1 exhibited high degradation activity to the sex pheromone component (Z)-8-dodecenyl alcohol and the host plant volatile butyl hexanoate with the degradation efficiency of 75.01% and 48.54%, respectively. We speculate that GmolGSTD1 works in inactivating odorant molecules and maintaining sensitivity to olfactory communication of G. molesta .
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高影响因子
MOLECULAR PHYSICS
·
2019
·
IF 1.571
Wei-jie Ren,Jing-jing Bai,Yan-liang Zhao,Yu-long Wang,Fei Liu,Zhen-zhong Li
Fluorescent carbon-based nanoparticles, called chronically as carbon dots (CDs), were synthesised from citric acid (CA) and 2-Aminothiophenol (2AT) via an N and S co-doped hydrothermal method. After a series of micro-structural characterisation, N and S elements could be sufficiently doped by means of the heteroatom in the CDs solution. The as-prepared CDs solution showed blue colour fluorescence with the highest QY of 78.6%, and study on the UV–visible and PL spectra further revealed that the outstanding fluorescence of as-prepared CDs mainly originates from the generated molecular fluorophores instead of the surface state. Owing to the strong fluorescence, the as-prepared CDs can be used as a sensing probe for the detection of Ag+ with high sensitivity and selectivity. However, the changes of fluorescence intensity exhibited the complex nature of the quenching mechanism due to the –SH and –NH2 groups on the fringes of carbonaceous cores or molecular fluorophores to aggregate into another fluorescent cores with the assistance of Ag+ ions, which promises a new approach for efficient detection of Ag+ for the application in industrial pollutants.This figure shows citric acid (CA) and 2-Aminothiophenol (2AT) via an N and S co-doped hydrothermal method to prepare CDs with blue colour fluorescence and the highest QY of 78.6%. Owing to the excellent fluorescence, the as-prepared CDs can be used as a sensing probe for the detection of Ag+ with high sensitivity and selectivity, and the changes of fluorescence intensity exhibited the complex nature of the quenching mechanism due to the –SH and –NH2 groups on the fringes of carbonaceous cores or molecular fluorophores to aggregate into another fluorescent cores with the assistance of Ag+ ions, which promises a new approach for efficient detection of Ag+ for the application in industrial pollutants.
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高影响因子
Food & Function
·
2019
·Vol. 10
·期 9
·5656-5668
·
IF 3.241
Mengying Wei,Zhongying Liu,Yuanyuan Liu,Shizhe Li,Mingxin Hu,Kexin Yue,Tianshu Liu,Yang He,Zifeng Pi,Zhiqiang Liu,Fengrui Song
Schisandra chinensis (Turcz.) Baill (S. chinensis), a functional food, is used as a tonic and sedative agent in traditional Chinese medicine. Modern pharmacological research has proved that S. chinensis could prevent and treat age-related neurodegenerative diseases. The presence of bioactive lignans in S. chinensis is the main reason for its neuroprotective and cognitive enhancement effects. This study aimed to clarify the mechanism of lignans in S. chinensis in ameliorating learning and memory deficits in Alzheimer's disease (AD) animals. The step-down test and Morris water maze (MWM) test were used to verify the effects of lignans in S. chinensis on learning and memory in AD animals. Then, metabolomics approaches based on ultraperformance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS) were used to clarify the mechanism of lignans in S. chinensis in treating AD. Finally, quantitative analysis of AD-related neurotransmitters in the brain was conducted after treatment with lignans in S. chinensis. In the MWM and step-down tests, lignans in S. chinensis showed a clear ability to ameliorate the impaired learning and memory of AD animals. A total of 31 endogenous metabolites were identified after treatment with lignans in S. chinensis, which were associated with lignans ameliorating learning and memory. These biomarkers were mainly associated with polyunsaturated fatty acid metabolism and amino acid and vitamin metabolism. Moreover, lignans in S. chinensis upregulated the levels of γ-aminobutyric acid (GABA), 5-hydroxytryptamine (5-HT), acetylcholine (Ach), norepinephrine (NE) and glycine (Gly) and downregulate the level of aspartic acid (Asp). Lignans in S. chinensis might alleviate the neurotoxic effects of neurological inflammation and oxidative stress, Aβ deposition, and tau phosphorylation via the regulation of multiple endogenous metabolic pathways during pathological AD. The research might provide useful support for the further study of pharmacology and new drug development of lignans in S. chinensis.
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高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 11
·1-10
·
IF 5.705
Zhu Xiang,Wang Jianying,Zhu Yuhua,Jiang Honghao,Tan Di,Xu Ziqiang,Mei Tao,Li Jinhua,Xue Longjian,Wang Xianbao
N,S-co-doped carbon dots (N,S-CDs) were synthesized via a single-step solvothermal process by using sodium lignosulfonate and p-phenylenediamine as carbon/nitrogen/sulfur sources. The N,S-CDs have an average diameter of 2.02 ± 1 nm and display green fluorescence, with excitation/emission peak wavelengths at 380/540 nm for optimal fluorescence. Fluorescence is excitation wavelength-dependent and stable in aqueous salt solutions. The fluorescence of the N,S-CDs is selectively quenched by Fe(III) and Ag(I) ions. These ions can be quantified by fluorometry with a limit of detection of 1.7 μM for Fe(III) ions and 11.6 μM for Ag(I) ions. The N,S-CDs also undergo solvatochromism in that emission is green in water solution but blue in polar organic solvents such as ethanol or N,N-dimethylformamide. The color of fluorescence gradually shifts from green to blue when continuously increasing the fraction of organic solvent in water.
N,S-co-doped carbon dots (N,S-CDs) are synthesized by using sodium lignosulfonate and p-phenylenediamine as C/N/S sources. The N,S-CDs can sensitively detect Fe(III) and Ag(I) ions based on fluorometry, and can be used as a solvatochromic probe.
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高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Wenqiang Yang,Junrong Zeng,Yixin Hua,Cunying Xu,Samarjeet Singh Siwal,Qibo Zhang
Herein, we perform a facile one-step deep eutectic solvent electrodeposition approach to fabricate a series of S-doping highly porous Co-S films by in situ grown on Ni foam (Co-S/NF), which exhibits a superior catalytic activity and robust nature for both oxygen and hydrogen evolution reaction (OER and HER) in alkaline media . The doping of S is evidenced to induce a structural and size transition on the Co deposited layer, which leads to a significant increase on the electrochemical surface area and more accessible active sites for enhancing the catalytic activity. The formation of oxygen deficiencies-rich Co-O/OH species with a phase transformation from Co-S species is noticed during OER. Benefiting from the merits of in situ growth, the Co-S films obtained at an optimal S doping level (denoted as Co-S-50/NF) can robustly drive high current densities of 100 and 500 mA cm −2 with low overpotentials of 322 and 368 mV for OER, and 124 and 155 mV for HER . The water electrolyzer assembled with Co-S-50/NF requires only 1.79 and 2.08 V to reach 100 and 500 mA cm −2 in 1.0 M KOH, and 1.72 V to achieve 500 mA cm −2 in 30 wt% KOH at 353 K for over 150 h.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 25
·6687-6695
·
IF 3.286
Dong Wenjuan,Wang Ruiping,Gong Xiaojuan,Dong Chuan
Fluorescence resonance energy transfer (FRET) is a kind of energy transfer mechanism depending on the distance between donor and acceptor, which exhibited potential application in biosensors. In this study, an efficient fluorescence “turn-on” strategy for the detection of glutathione (GSH) has been established based on FRET between nitrogen and sulfur dual-doped carbon dots (N,S-CDs) and gold nanoparticles (Au NPs). A novel N,S-CDs was synthesized by a one-pot hydrothermal treatment of 3-aminothiophenol, which possessed excellent fluorescence property with the maximum emission wavelength of 530 nm. Then, the as-prepared N,S-CDs served as energy donor to transfer energy to Au NPs via FRET process, resulting in fluorescence quenching of N,S-CDs. However, the fluorescence of N,S-CDs was recovered efficiently by adding GSH into the mixture solution of N,S-CDs and Au NPs. Therefore, the FRET assembly of N,S-CDs and Au NPs was used as a fluorescence probe for the “turn-on” sensing GSH with the linear range from 3.8 to 415.1 μM and the limit detection of 0.21 μM. This nanosensor platform was employed to monitor GSH in serum samples with satisfying results.
Graphical abstract
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高影响因子
Comparative Biochemistry and Physiology D-Genomics & Proteomics
·
2019
·
IF 2.573
Xiao-rui Zhang,Jia-qi Zhang,Ying-ying Shao,Xiao-rong Xing,Jiao Wang,Zhi-xiang Liu,Yi-jiangcheng Li,Andrews Danso Ofori,Qing-bo Tu,Jun Wang,Sheng Sheng,Fu-an Wu
Meteorus pulchricornis (Wesmael) (Hymenoptera: Braconidae) is a preponderant endoparasitoid wasp, attacking the larvae of many lepidopteran pests. We present the first body transcriptome dataset for M. pulchricornis . In total, 50,781,796 clean reads were obtained and 33,144 unigenes were assembled; 15,458 unigenes showed a significant similarity (E value < 10 −5 ) to known proteins in the NCBI non-redundant protein database . Gene ontology and cluster of orthologous group analyses were performed to classify the functions of genes. To better understand the role of glutathione-S-transferases (GSTs) in detoxification mechanism in M. pulchricornis , we identified seventeen GST genes ( MpulGSTs ) from the body transcriptome. Among these, fifteen MpulGSTs belonged to cytosolic GSTs and the other two belonged to microsomal classes. The cytosolic GSTs were classified into four different clades: four in delta, three in omega, seven in sigma, and one in zeta. The expression levels of these MpulGSTs after exposure to sub-lethal concentrations of phoxim and cypermethrin were determined using real-time quantitative polymerase chain reaction: seven MpulGSTs ( MpulGSTD3 , MpulGSTS1 , MpulGSTS2 , MpulGSTS4 , MpulGSTS6 MpulGSTO3 , and MpulGSTmic1 ) and 11 MpulGSTs ( MpulGSTD1 , MpulGSTD2 , MpulGSTD3 , MpulGSTO2 , MpulGSTS1 , MpulGSTS2 , MpulGSTS3 , MpulGSTS4 , MpulGSTS5 , MpulGSTS7 , and MpulGSTmic1 ) were highly expressed, respectively. These results suggested that GST genes may play a pivotal role in detoxification process in M. pulchricornis . Our findings would provide a theoretical base for elucidating insecticide susceptibility and should promote functional research on specific GST genes in parasitoid wasps.
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高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 6
·期 4
·1551-1560
·
IF 8.867
M. Y. Gao,J. R. Zeng,Q. B. Zhang,C. Yang,X. T. Li,Y. X. Hua,C. Y. Xu
The rational design of noble metal-free electrocatalysts that are highly active, robustly stable, and capable of delivering large current densities (>500 mA cm−2) at low applied potentials (<300 mV), in particular for oxygen evolution reaction (OER), is critical for practical use in electro-driven water-splitting devices. Herein, we report a facile scalable and one-step electrochemical deposition approach for the development of a self-supported 3D nanoporous S-doped amorphous NiFe2O4/Ni3Fe composite electrode with outstanding OER electrocatalytic activity and robust durability in alkaline media. Benefiting from the 3D nanoporous architectures and their in situ growth on a highly conductive substrate, the novel S-doped NiFe2O4/Ni3Fe composite electrode offers an ideal platform for fast electron transport and efficient mass transport. It also provides abundant active surface area as well as accessible active sites for a catalytic reaction. Impressively, the S-doped composite electrode displays superior OER activity in 1.0 M KOH that compares favorably with the state-of-the-art RuO2 catalyst. Low overpotentials of 260 and 285 mV (iR corrected) are required to reach long-term stable current densities of 100 and 500 mA cm−2 for OER, respectively. The electrolyzer cell obtained by pairing this S-doped composite electrode as an anode with a Ni–Mo based cathode for overall water-splitting works efficiently in both 1.0 M (1.52 V for 10 mA cm−2 and 1.79 V for 100 mA cm−2) and 30 wt% KOH (1.69 V for 100 mA cm−2) solutions, with long durability for over 220 h. Such catalyst couple exhibits superior catalytic performance and holds great promise for potential application in electrochemical water splitting.
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高影响因子
CELLULOSE
·
2017
·Vol. 25
·期 1
·167-177
·
IF 3.417
Wu Yongli,Gao Jianping,Hao Chaoyue,Mei Shunkang,Yang Jiangbing,Wang Xiaoxue,Zhao Ruiru,Zhai Xiangang,Liu Yu
A photocatalyst consisting of a cellulose hydrogel loaded with Cd
x
Zn 1− x
S (Cd
x
Zn 1− x
S-Gel) was prepared, and its photocatalytic water splitting activity was studied. At room temperature, the Cd
x
Zn 1− x
S particles with an average size of about 3 nm were loaded in carboxymethyl cellulose hydrogel by an in situ chemical reaction. This synthesis method was simple and repeatable. Diffuse reflectance UV–vis results showed that it is possible to adjust the optical properties of the synthesized photocatalysts by adjusting their composition. Under visible light irradiation, the hydrogen production rate of the photocatalysts was greatly improved. In the absence of a co-catalyst,
Cd 0.2 Zn 0.8 S-Gel obtained the highest hydrogen production rate of 1762.5 μmol g −1 h −1 , which is almost 104 times of that of the pure CdS. Moreover, after four hydrogen production cycles, the hydrogen production rate did not decrease significantly, showing excellent stability. It is noteworthy that the Cd
x
Zn 1− x
S-Gel can easily be removed from the aqueous solution after hydrogen production. This is a new approach for manufacturing easy recoverable visible-light-driven photocatalysts, which is vital for hydrogen production through a “green” process.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Shanpeng Li,Yuling Zhuo,Dong Liu,Hui Pan,Zhenbo Wang
Improving the Pt atoms utilization efficiency on self-supported electrodes is crucial for industrial seawater hydrogen production , but effective strategies are still lacking. Herein, we reported a novel strategy to anchor highly surface-exposed Pt single atoms on Ni 3 S 2 /Co 9 S 8 with abundant S vacancies (Pt–Ni 3 S 2 /Co 9 S 8 –Sv) as a self-supported electrode. Physical characterizations and theoretical calculations confirm that the strong Pt–S electron bridges with the coordinating role of surface S vacancies triggers the d -orbital electron rearrangements and regulates the local electron structures between the Co/Ni and Pt sites. Notably, the Pt–Ni 3 S 2 /Co 9 S 8 –Sv electrode displays an ultralow overpotential of 18 mV at 10 mA cm −2 in alkaline seawater . More importantly, our Pt–Ni 3 S 2 /Co 9 S 8 –Sv electrode assembled into an alkaline electrolysis cell can work continuously for 50 h under alkaline seawater @ 60 °C. This work provides a promising strategy for designing highly surface-exposed single-atomic catalyst for large-scale hydrogen evolution through seawater electrolysis.
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高影响因子
危险品化学品经营许可证（带存储）