PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Xiaoqian Ji,Wan Zhang,Fangqing Ge,Chaoxia Wang,Yunjie Yin,Kunlin Chen
A novel “off-on” terminated polyurethane based on the rhodamine B modified dye RhEA was constructed with the polyethylene glycol (PEG) and 1,4-butanediol (BDO) as soft segment, isophorone diisocyanate (IPDI) as hard segment. The RhEA terminated polyurethane turned to red from colorless after 254 nm UV induction accompanying transformation of RhEA from a twisted spirolactam to a planarized ring-opened amide. The intensity of absorbance enhanced as UV induction time increased. And the color of the RhEA terminated polyurethane changed from red turned to light red (45 °C) and colorless (65 °C), reversibly. The RhEA terminated polyurethane showed good thermal stability. The thermochromic cotton fabric was obtained with RhEA terminated polyurethane via flat screen printing and it turned to red from white after 254 nm UV induction. The K/S values decreased nearly 65.8% at 45 °C compared to 40 °C suggesting the thermochromic cotton became light red and it turned to white completely at 65 °C. The lactam ring was still retained during the printing process and the thermochromic cotton fabric possessed thermochromic behavior after UV induction. They can be a promising candidate for developing a flexible sensor to monitor environmental changes.
研究领域:
材料科学
·
染料化学
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DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 236
·期 1
·1-15
·
IF 3.8
Li Xiao-fang,Ding Yue,Wang jing,Feng Xiao-qiang
Based on the excellent adsorption, photosensitization and electron transfer ability of biochar, the combination of photocatalyst and biochar is an effective method to improve the overall photocatalytic activity. Hence, a novel efficient CS-biochar/ZnO/TiO 2 photocatalyst with the different content of N-doped porous CS-biochar were constructed and characterized by a variety of testing methods, such as FT-IR, XRD, UV–vis DRS, SEM–EDS, PL, EIS, TPR, LSV. Photocatalytic experiments indicated that all the CS-biochar/ZnO/TiO 2 composites with different CS-biochar content exhibit excellent photocatalytic activity for Rh B degradation. Among them, 63%-CS/ZnO/TiO 2 composite has the best catalytic activity, which 94.5% of Rh B was degraded within 25 min, and the kinetic constant was 0.0993 min −1 , which is about 1.96 and 1.72 times that ZnO (0.0507 min −1 ) and TiO 2 (0.0576 min −1 ), respectively. Moreover, photoelectrochemical experiment results confirmed that CS-biochar/ZnO/TiO 2 greatly enhanced the charge separation process compare with ZnO and TiO 2 . Meanwhile, CS-biochar/ZnO/TiO 2 has excellent stability, and a possible photocatalytic mechanism was put forward.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Xiao-Di Zhao,Bin-Wu Zhang,Li-Jun Fu,Qi-Lin Li,Yi Lin,Xiao-Qiang Yu
Cry toxins produced by Bacillus thuringiensis are well known for their high insecticidal activities against Lepidoptera, Diptera, and Coleoptera; however, their activities against Aphididae are very low. Recently, it has been reported that a Cry41-related toxin exhibited moderate activity against the aphid Myzus persicae, and thus, it is highly desirable to uncover its unique mechanism. In this paper, we report that Cathepsin B, calcium-transporting ATPase, and symbiotic bacterial-associated protein ATP-dependent-6-phosphofructokinase were pulled down from the homogenate of M. persicae as unique proteins that possibly bound to Cry41-related toxin. Cathepsin B has been reported to cleave and inactivate antiapoptotic proteins and plays a role in caspase-initiated apoptotic cascades. In this study, Cathepsin B was expressed in Escherichia coli and purified, and in vitro interaction between recombinant Cathepsin B and Cry41-related toxin was demonstrated. Interestingly, we found that addition of Cry41-related toxin obviously enhanced Cathepsin B activity. We propose a model for the mechanism of Cry41-related toxin as follows: Cry41-related toxin enters the aphid cells and enhances Cathepsin B activity, resulting in acceleration of apoptosis of aphid cells.
研究领域:
昆虫学
·
分子生物学
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DOI
PubMed
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2022
·Vol. 135
·期 2
·1099-1111
·
IF 1.843
Zhang Hewei,Duan Congcong,Xu Zhen,Yin Jiahang
Herein, the C 60 /Cd 0.5 Zn 0.5 S (C 60 /CZS) photocatalysts with excellent photocatalytic performance were prepared using facile one-pot hydrothermal method. The crystal structure, morphology, photoelectric performance and photocatalytic activity of the samples were characterized by XRD, XPS, UV–Vis and electrochemistry. The catalytic degradation of pollutants under the irradiation of visible light was simulated using Rhodamine B (Rh B). The content of C 60 was changed from 0.5 to 5 wt%, and the optimal value for the photocatalytic activity was determined to be 2 wt%. The apparent degradation rate and degradation efficiency of Rh B were 0.024 min −1 and 97.5% within 140 min, which is 3.4 times that of pure CZS. C 60 /CZS exhibited excellent catalytic performance, and its photocatalytic activity was sustained even after three cycles. Moreover, electrochemical test results demonstrated that the separation and transfer of photocarriers on CZS surface were effectively improved by C 60 , thus enhancing its activity. In this study, we innovatively prepared a novel photocatalyst by combining fullerenes with sulfide solid solution for the first time, which has rarely been studied in the past. The synthetic method is simple, efficient and pollution-free. Subsequently, the catalytic degradation of Rh B experiment confirmed that the catalyst has high catalytic efficiency and stability. This experiment has practical significance not only for the catalytic degradation of Rh B but also for the application of fullerene in photocatalysis.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 8
·1717
·
IF 4.6
Chenghong Ao,Mai Shan,Yue Zhang,Xiang Li,Ying Kong,Xinwei Dong,Yang Liu,Danping Wu
Biochar has attracted considerable interest owing to its high adsorption capacity; however, the mechanisms through which environmental factors influence the release of adsorbed pollutants remain unclear. This study investigates the adsorption and desorption dynamics of Rhodamine B (RhB) on biochars B2 and B6, which were pyrolyzed at temperatures of 200 °C and 600 °C, respectively, under varying conditions. The results indicated that there was no significant difference in removal efficiency at low RhB concentrations; however, at a concentration of 600 mg/L, biochar B2 had a higher removal efficiency than B6, likely attributable to more adsorption sites. Increased temperatures were found to enhance desorption from both B2 and B6, with B6 exhibiting a faster desorption rate. This phenomenon may be due to the stronger hydrogen bonding between B2 and RhB, which could inhibit desorption. In addition, elevated pH values facilitated desorption, presumably through electrostatic repulsion. Under alkaline conditions, B2 released a greater amount of dissolved organic matter (DOM), leading to increased RhB desorption relative to B6. This study offers a valuable reference for evaluating the environmental risk associated with the application of biochar in real-world settings.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2016
·
IF 2.725
Luanluan Zhang,Hejun Gao,Yunwen Liao
A series of functional cross-linked polymer (Poly(AMPS- co -DVB)) were synthesized by 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and divinylbenzene (DVB). The physicochemical properties of the Poly(AMPS- co -DVB) were characterized by FT-IR, TGA , SEM, XRD , Zeta potential and UV–Vis. Those results showed that the Poly(AMPS- co -DVB) could provide mounts of adsorption sites from its special structure. The effects of the initial pH, dosage, contact time, and temperature on the adsorption of Rhodamine B (RhB) onto the Poly(AMPS- co -DVB) were investigated. It was found that the initial pH was an important factor for the molecules form of RhB and the surface formation of Poly(AMPS- co -DVB). With increasing of molar ratio of AMPS/DVB, the adsorption efficiency increased gradually. In the adsorption process , both physical and chemical mechanism is presence to adsorb RhB. The maximum adsorption capacity could get 407.9 mg/g within 2 h at room temperature .
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF NATURAL PRODUCTS
·
2025
·
IF 3.6
Zhenzhen Zhang,Wei Li,Miaomiao Chai,Bing Wang,Xiaomin Zhang,Dehai Li,Xueqian He,Zhenhui Wang
The first total synthesis of (±)-talaroenamine B was achieved through a concise four-step procedure. The key feature of this synthetic strategy lies in a one-pot reaction involving I (III)-mediated oxidative dearomatization to construct a racemic cyclohexanedione unit, followed by imination using a chiral auxiliary to afford a separable mixture of diastereoisomers. A further acid-catalyzed substitution reaction of aniline with the diastereoisomers led to the natural product (−)-talaroenamine B and its enantiomer (+)-talaroenamine B. Additionally, virtual screening was utilized to expand the chemo-diversity of talaroenamines, and (±)-talaroenamine B diphenylene derivatives 6–11 were obtained by replacing aniline with selected aniline derivatives in the final step of synthesis. The structures of the synthetic compounds were elucidated using NMR, HRESIMS, and electronic circular dichroism (ECD) data. Compound 6b displayed an acetylcholinesterase (AChE) inhibitory effect with an IC50 value of 4.5 μM, as well as cytotoxicity against the K562 cell line with an IC50 value of 5.6 μM.
研究领域:
有机化学
·
药物化学
·
生物化学
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DOI
PubMed
高影响因子
SENSORS
·
2025
·Vol. 25
·期 2
·569
·
IF 3.5
Sisi Ke,Ningrui Wang,Xingyu Chen,Jiangwei Tian,Jiwei Li,Boyang Yu
Flavokavain B (FKB), a hepatotoxic chalcone fromPiper methysticum(kava), has raised safety concerns due to its role in disrupting redox homeostasis and inducing apoptosis in hepatocytes. Conventional chromatographic methods for FKB detection, while sensitive, are costly and impractical for field applications. In this work, DNA aptamers were selected using the library-immobilized method and high-throughput sequencing. Three families of aptamers were obtained, and the best one named FKB-S showed a dissociation constant (KD) of 280 nM using microscale thermophoresis. To demonstrate its practical utility, a rapid and label-free colorimetric aptasensor was developed based on aptamer-induced gold nanoparticle aggregation. This assay achieved a detection limit of 150 nM (43.46 ng/mL) and provided results within 10 min. Compared to traditional chromatographic methods, the aptasensor offers a simple, cost-effective, and equipment-free approach for on-site FKB detection, making it a promising tool for the quality control and safety monitoring of kava-based products in diverse environments.
研究领域:
分析化学
·
毒理学
·
食品安全
·
分子生物学
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DOI
PubMed
高影响因子
Russian Journal of Physical Chemistry A
·
2014
·Vol. 89
·期 2
·291-296
·
IF 0.488
Sun C. H.,Wang M. L.,Feng Q.,Liu W.,Xu C. X.
The SERS signals of Rhodamine B (RhB) adsorbed on Ag, ZnO, and Ag-capped ZnO (ZnO/Ag) substrates were studied. Comparative analysis indicated no significant difference in the positions of the peaks, but the intensities of SERS signals are different. However, abnormal Raman spectrum of RhB (10 −4 M) adsorbed on ZnO was observed, which was different from the normal Raman spectrum distinctly. By assignment of the vibrational bands of abnormal Raman spectrum, it is suggested that the nitrogen atom is primarily adsorbed on the ZnO substrate instead of the xanthene ring.
研究领域:
光谱学
·
材料科学
·
化学
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DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Xiaoping Chen,Yuansong Wei,Bohong Chen,Jiaqi Fu
In this study, a Ti foam-based photocatalytic membrane reactor (PMR) was constructed for rhodamine B (RhB) wastewater decolorization. Ti foam was chosen as a membrane and visible-light-driven C3N4 was chosen as a photocatalyst. The results showed that the decolorization efficiency could be up to 100% with a flow rate of 6.93 mL/min when the PMR was applied in the treatment of a 30 mg/L RhB solution and the concentration of C3N4 was 1 g/L. pH played an important role in the decolorization performance of the PMR. Alkalinity was not conducive to the decolorization of RhB in the PMR, which was mainly due to the property that RhB was difficult to dissolve in an alkaline solution. Membrane fouling was mainly caused by a C3N4 photocatalyst, while the effect of RhB on membrane fouling was negligible. Membrane fouling could be retarded when the PMR was applied for RhB treatment under visible-light irradiation, which was because of photoinduced hydrophilicity of C3N4. The membrane flux could be restored to its initial values after simple ultrasonic cleaning and backwashing. This was due to the large difference between the pore size of Ti foam and the particle size of C3N4 and the super hydrophilicity of Ti foam and C3N4.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
·
2019
·
IF 3.119
Liting Wu,Enxu Zhou,Along Gao,Linghe Kong,Siwei Wu,Xia Bian,Yuan Li,Bingxi Li,Shengli Fu,Zheng Guo,Jianmin Ye
B lymphocyte-induced maturation protein 1 (Blimp-1), a transcription factor containing zinc finger , is required and sufficient to trigger terminal differentiation of B cells in mammals. The Blimp-1 ( OnBlimp-1 ) from Nile tilapia ( Oreochromis niloticus ) was identified and characterized its expression pattern during B cell activation and maturation. The cDNA of OnBlimp-1 open reading frame is 2547 bp encoding a protein of 848 amino acids and the predicted molecular weight is 93.36 kDa. OnBlimp-1 contains a SET domain and five ZnF_C2H2 domains, which shares high homology with that of other species. OnBlimp-1 transcription was detected in all examined tissues with high expression in the spleen (SPL). Analysis of sorted lymphocyte populations , including IgM + and IgM − cells from peripheral blood (PBL), SPL and anterior kidney (AK), indicated that the OnBlimp-1 transcription was highly expressed in the IgM + B cells. Upon LPS stimulation, OnBlimp-1 expression was up-regulated in tissues of PBL, SPL and AK significantly. The expression of OnBlimp-1 , as well as the secreted IgM , was significantly up-regulated in the SPL and AK leukocytes stimulated with anti-OnIgM monoclonal antibody and LPS in vitro , respectively. Above results suggest that OnBlimp-1, a cytokine regulating the terminal differentiation of activated B cells to antibody-secreting cells, is likely to play important roles in B cell activation and maturation in Nile tilapia.
研究领域:
免疫学
·
分子生物学
·
鱼类生理学
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DOI
PubMed
高影响因子
International Journal of Environmental Research and Public Health
·
2023
·Vol. 20
·期 5
·4571
·
IF 4.614
Shuyan Yu,Huiying Zhang,Congju Li
In this study, MIL-53(Fe) was innovatively incorporated into carbon felt (CF) by growing in-situ using the solvothermal method. MIL-53(Fe)@carbon felt (MIL-53(Fe)@CF) was prepared and used for the degradation of rhodamine B (RhB). As a new photocatalytic membrane, MIL-53(Fe)@CF photocatalytic membrane has the characteristics of high degradation efficiency and recyclability. Influence of various parameters including MIL-53(Fe)@CF loading, light, electron trapper type, and starting pH on RhB degradation were investigated. The morphology, structure, and degradation properties of MIL-53(Fe)@CF photocatalytic membrane were characterized. Corresponding reaction mechanisms were explored. The results indicated that pH at 4.5 and 1 mmol/L H2O2, 150 mg MIL-53(Fe)@CF could photocatalytically degrade 1 mg/L RhB by 98.8% within 120 min, and the reaction rate constant (k) could reach 0.03635 min−1. The clearance rate of RhB decreased by only 2.8% after three operations. MIL-53(Fe)@CF photocatalytic membrane was found to be stable.Keywords:MIL-53(Fe)@carbon felt;photocatalytic;degradation;rhodamine B
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）