TALANTA
·
2022
·
IF 6.556
Shuang Tan,Shunling Li,Congkui Tang,Xiongfei Bai,Xin Ran,Qing Qu,Lei Li,Long Yang
The conventional fluorescence analysis methods for disease identification are vulnerable to the restriction with false-positive. Here, a fluorescent switch with high efficiency and regeneration by the black phosphorus (BP) nanosheets-regulated was developed to overcome false-positive issue in the assay of β- amyloid 1−42 oligomers (A β ) process. The A β was rapidly recognized using the fluorescent emitter‐nitrogen-doped carbon nanodots (N-CDs) under the regulation of BP nanosheets , while the N-CDs alone cannot recognize A β without the introduction of BP. The fluorescence analysis methods exhibited a wide sensing range of 0.25–15.0 ng/mL and a low detection limit of 83 pg/mL for A β analysis, which was superior to the reported fluorescence analysis method. Further, BP nanosheets were recycled, demonstrating the fluorescent switch with highly efficient, stable, and regenerable. This provides a new idea for developing high-efficiency and high-precision fluorescence detection platform.
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DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 2.463
Weijie Liu,Liang Liu,Cong Liu,Yan Hao,Hao Yang,Bo Yuan,Jihong Jiang
Azo dyes are recalcitrant pollutants that constitute a significant burden to the environment. This study focused on decoloring azo dye Congo red using Shewanella oneidensis MR-1 and exploring methylene blue as electron shuttle to enhance its decolorization and detoxication efficiency. The effects of physicochemical parameters on anaerobic decolorization were investigated. The results showed that the suitable pH, temperature and NaCl concentration range for decolorization were 6.0–8.5, 28–40 °C and 0–20 g/L, respectively. Under the optimal conditions, 99.25% decolorization of up to 2 g/L Congo red was achieved within 24 h. Nitrite, nitrate and oxygen could significantly inhibit the decolorization. Riboflavin and methylene blue were found to be able to significantly accelerate decolorization capacity of S. oneidensis MR-1, however, block of Mtr respiratory pathway depressed the promotion effects of riboflavin and methylene blue, suggesting that the promotion effect was achieved by accelerating electron transfer between cells and dyes. Furthermore, the phytotoxicity analysis revealed that the toxicity of Congo red to Triticum aestivum , Pogostemon cablin and Isatis indigotica Fort was decreased during the decolorization process.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Qian Han,Cun Wang,Pingkun Liu,Gui Zhang,Li Song,Yingzi Fu
The excellent characteristics of porphyrins have inspired widespread interest in electrochemiluminescence (ECL). However, the limited ECL intensity and poor stability of porphyrins in aqueous solution are still severely restricted further biological application . Here, we subtly synthesized a functionalized europium and 5,10,15,20-tetrakis (4-carboxyphenyl) porphyrin (TCPP) coordination polymer (Eu-PCP) by a one-step solvothermal method . In sharp contrast to the pristine TCPP, Eu-PCP showed a higher and more stable ECL red-light emission (673 nm) at low potential (−1.1 V, vs Ag/AgCl), which was 7.7-fold higher ECL intensity and 4.6-fold efficiency. In view of the crucial role of mucin 1 (MUC1) in tumor overexpression , it was selected as the target molecule. Combined with exonuclease III (Exo III)-assisted recycling amplification strategy, a ternary ECL biosensor was constructed for the MUC1 detection based on Eu-PCP as a satisfied ECL emitter, gold nanoparticles capped CeO 2 (CeO 2 @Au) as the coreactant accelerator and peroxydisulfate as coreactant. Meanwhile, gold nanoparticles capped MnO 2 (MnO 2 @Au) was used as the quenching probe to achieve a highly sensitive detection of MUC1. The proposed biosensor exhibited a wide linear range from 1 fg mL −1 to 10 ng mL −1 with a low limit of detection (0.32 fg mL −1 ). By changing the corresponding target recognition DNA , this strategy could be expanded to detect other biomarkers.
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PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Junwei Yao,Jingxia Liu,Heng Zhi,Hongbing Tao,Xiaobao Xie,Qingshan Shi
The primary purpose of this study was to develop an innovative chitosan (CS) modified polylactic acid (PLA) nanospheres for enhancing the bioavailability of 1, 2-benzisothiazolin-3-one (BIT). The cellular uptake efficiency was corresponded positively to the quantity of CS coated on BIT-PLA nanospheres against E. coli and S. aureus . The membrane potentials of E.coli and S. aureus treated with BIT-PLA, BIT-PLA-0.1%CS and BIT-PLA-0.5%CS were reduced with the extension of incubation time and the ratio of coated CS. The enhancement of CS modified on BIT-PLA nanospheres was reduced antioxidase activities and generated excessive reactive oxygen species . The lowest EC 50 value of the modified BIT-PLA-0.5%CS suggested that its toxicity index was around 2.95-fold and 2.11-fold that of non-modified BIT-PLA against E. coli and S. aureus , respectively. These results revealed that the CS modified BIT-PLA nanospheres had a bright prospect in antibacterial formulation delivery system and improving the bioavailability.
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DOI
PubMed
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2023
·
IF 5.7
Yongdi He,Jinou Song,Jiuzhong Yang,Yuan Zhuang,Liang Qiu,Zhijun Li,Shubao Song,Yongfeng Liu,Jibiao Xie
In order to investigate the species pool and primary channels of initiated pyrolysis of n- hexane, the low-pressure (30 Torr, 4.0 kPa) flow reactor pyrolysis of n- hexane initiated by 5% 1- nitropropane ( 1- NP) was studied experimentally in a wide range of temperature from 623 K to 1223 K. Combined with synchrotron vacuum ultraviolet (SVUV) photoionization mass spectra scanned at photon energies ranging from 9.0 to 14.7 eV and near-threshold photoionization efficiency (PIE) spectra, 29 pyrolysis species, covering C 1 –C 6 hydrocarbons and several pyrolysis species containing O or N atoms, were identified. Based on the ion signal intensities of the visible peaks in the mass spectra, the mole fraction profiles of all the experimental species were evaluated. The experimental results suggested that the initial pyrolysis temperature of n- hexane was reduced by approximately 275–325 K. On the basis of the mole fraction profiles and the initial formation temperatures reported in this work and rate coefficients proposed in previous studies, the 1- NP-initiated pyrolysis mechanisms of n- hexane were discussed. It was suggested that n- hexane was dominantly consumed by the H-abstraction reactions by the attack of OH radical in this work. The 1- NP-initiated pyrolysis of n- hexane mainly proceeded via reactions to produce C 3 H 6 + C 3 H 7 , or 1- C 4 H 8 + C 2 H 5 , or 1- C 5 H 10 + CH 3 .
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高影响因子
Frontiers in Nutrition
·
2022
·
IF 6.59
Chen Haiyan,Li Rongji,Zhao Feng,Luan Li,Han Tiantian,Li Zhong
Numerous studies reported that betulinic acid (BA), a natural product extracted from birch bark, exhibited various beneficial effects in vitro. However, its pharmacological activities in aging are rarely understood. In this study, Caenorhabditis elegans was deployed as a whole animal model to investigate the impacts of BA on lifespan and stress resistance. Wild-type C. elegans were fed in the presence or absence of BA and tested for a series of phenotypes, including longevity, mobility, reproductive capacity, pharyngeal pumping, heat stress, and oxidative stress. BA at the optimal dose (50 μg/mL) extended the lifespan, improved the healthspan, and significantly evoked the increased oxidative stress resistance in C. elegans. Incorporating the genetic analysis with different types of longevity mutants, DAF-16, the downstream effector of the Insulin/IGF-1 receptor signaling, was revealed to mediate the protective effects of BA on lifespan and antioxidant activity. Together, these data showcased the potential of BA in promoting healthy aging, which shall facilitate its further development in the food and pharmaceutical industries.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 42
·22619-22623
·
IF 5.968
Yuhan Lin,Fang Zhang,Daocheng Pan
A series of (ZnS)x(CuInS2)1−x hierarchical micro/nano-structured solid solutions with precisely controlled chemical composition were synthesized via a facile one-pot solvothermal method. ZnO, Cu2O, and In(OH)3 are used as the starting materials and dissolved in ethanol dithiocarbamic acid which is formed from CS2 and ethanolamine in situ. The ethanol dithiocarbamic acid not only serves as a thermally-degradable ligand, but also acts as sulfur source during synthesis, and can be completely removed by a simple calcination process. As-prepared (ZnS)x(CuInS2)1−x microspheres have a hierarchical micro/nano structure composed of around 7 nm nanoparticles. These samples show excellent photocatalytic H2 evolution activity under visible-light irradiation without any noble metal loading owing to their high surface area (as high as 101.6 m2 g−1) and unique hierarchical structure.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Jiuli Han,Lu Bai,Haiyan Jiang,Shaojuan Zeng,Bingbing Yang,Yinge Bai,Xiangping Zhang
Ionic liquids (ILs) have become attractive in membranes for CO2 separation because of the designable structure, high CO2 affinity, and good compatibility and stability. Modification of metal–organic frameworks with ILs is an effective strategy to improve the gas separation performance of mixed matrix membranes (MMMs). In this work, task-specific ionic liquids (TSILs) were incorporated to prepare TSIL@ZIF-67/PIM-1 MMMs and improve CO2 separation performance because of the high CO2 solubility and great compatibility toward ZIF-67 and PIM-1. The TSILs (TMGHIM and TMGHPhO) selectively and reversibly interact with CO2 and improve the interfacial compatibility between ZIF-67 and PIM-1, leading to higher CO2/CH4 and CO2/N2 selectivities than that of the ZIF-67/PIM-1 MMM and the directly blended membrane (TSIL/ZIF-67/PIM-1). The 10 wt % TMGHIM@ZIF-67/PIM-1 MMM shows enhanced CO2/N2 and CO2/CH4 selectivities of 13.7 and 10.5, respectively; meanwhile, the CO2 permeability reaches 12,848.5 Barrer and is 2.5 times that of the pure PIM-1 membrane. The TSIL@ZIF-67/PIM-1 MMMs also show good stability against physical aging.
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2020
·Vol. 126
·期 11
·1-14
·
IF 1.81
Shi Feng,Xiao En-Cai,Chen Guohua,Chen Ying
Non-stoichiometric Nd[Mg 0.5 Sn 0.5(1+ x ) ]O 3 (− 0.04 ≤ x ≤ + 0.04)—type samples were prepared using a traditional two-step solid-state sintering process. Their crystal structures, phase compositions, dielectric properties and lattice vibrational characteristics were identified in detail. The double perovskite Nd(Mg 0.5 Sn 0.5 )O 3 with a monoclinic structure was distinguished as the main crystalline phase, and pure phase was obtained when x < 0. The sample [Nd(Mg 0.5 Sn 0.49 )O 3 ] at x = − 0.02 shows the excellent dielectric properties: ε r = 18.74, Q × f = 47,979 GHz. The lattice vibrational characteristics were clarified with Raman and infrared active mode spectroscopy. The intrinsic properties were fitted by four-parameter semi-quantum model, which show that the low-frequency infrared modes yield a more significant contribution to permittivity and dielectric loss. Raman shifts of modes F 2g (A) and F 2g (B) correlate with dielectric constants negatively, which implies that the bond length has a positive correlation with permittivity. Full widths at half maximum of vibrational modes A 1g (O) correlate with dielectric loss values positively and correlate with the degree of order ( S ) negatively.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 21
·18634-18639
·
IF 2.324
Li Yu-nan,Yuan Shifeng,An Shaobo,Niu Shuting,Jiang Juan,Gan Lin,Zhang Tianjin
The x(Ca 0.8 Na 0.1 Sm 0.1 )TiO 3 –(1 − x)(Sm 0.5 Nd 0.5 )AlO 3 (CNST–SNA, 0.60 ≤ x ≤ 0.75) ceramic materials were prepared by a conventional two-step solid-state reaction route. The effects of the sintering temperature and composition on the phases, microstructures, and microwave dielectric properties were investigated. The optimal sintering temperature of the CNST–SNA ceramics was found at 1475 °C. The optimal microwave dielectric properties were achieved at x = 0.69 with ε r = 43.8, Q × f = 34303 GHz (at 5.968 GHz), and τ f = − 1.64 ppm/°C.
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高影响因子
JOM
·
2020
·Vol. 72
·期 11
·3806-3811
·
IF 2.054
Li Min,Li Ying
In this work, we report an electrochemical route to directly reduce solid lead oxide (PbO) to lead in an acetamide-1-methylimidazolium trifluoromethylsulfonate (acetamide-MIMTfO) low-temperature molten salt. A cyclic voltammogram recorded using a graphite cavity electrode filled with PbO powder reveals that solid PbO can be directly electrochemically reduced to lead. Constant voltage electrolysis experiments with a PbO pellet cathode and a high-purity graphite anode were performed under different constant voltages (2.2–2.8 V) and at 343 K for different durations (2–6 h). XRD patterns of the electrolysis products confirm that the PbO pellet can be thoroughly reduced to lead after 6 h electrolysis. The present electrochemical route and acetamide-MIMTfO low-temperature molten salt can be used for extracting metals from their oxides at room temperature.
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 315
·期 3
·581-593
·
IF 1.181
Jie Fengping,Bai Zhishan,Yang Xiaoyong
A microemulsion consisting of sodium laurate, n -pentanol, n -heptane and NaCl solution was investigated for Co(II) extraction. The dilution method and conductivity method were used for the determination of structural parameters of sodium laurate/pentan-1-ol/heptane/NaCl microemulsion system. Co(II) was found to be extracted into the microemulsion phase due to the compound formation of [CoCl] + [R 11 COO] − , which was confirmed by the continuous variation of R 11 COONa concentration. Moreover, the effects of cosurfactant, the contact time, the phase ratios, PH and the NaCl concentration in feed solutions on the cobalt extraction yield were investigated. Under the optimum conditions, the extraction percentage of Co(II) could reach 98.9%.
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高影响因子
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