期刊：
Progress in Organic Coatings,2019年127:408-418 ISSN：0300-9440
通讯作者：
Li, Xiangzhou
作者机构：
[Liu, Yanxin; Zhou, Jun; Li, Xiangzhou; Wu, Zhiping; Qian, Wei] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Qian, Wei] Guangdong Polytech Environm Protect Engn, Nanhai 528216, Foshan, Peoples R China.;[Li, Xiangzhou] State Key Lab Ecol Appl Technol Forest Area South, Changsha 410004, Hunan, Peoples R China.;[Liu, Yanxin] Changsha Univ Sci & Technol, Sch Chem & Bioengn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Li, Xiangzhou] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Tea saponin;CTS-IFRCs;Synergistic effects;Multi-stage gas phase flame-retardant mechanism;Pyrolysis kinetic performance
摘要：
Tea saponin intumescent flame-retardant coatings (TS-IFRCs) is a green and high-efficiency flame-retardant coating based on natural-based tea saponin (TS), and has been confirmed with superior flame retardancy. The present study determined and assessed the effects of TS on the flame-retardant mechanism in composite tea saponin intumescent flame-retardant coatings (CTS-IFRCs) through the analysis of TG-DSC, FT-IR, SEM-EDS and pyrolysis kinetics. It has been demonstrated from the results that TS, synergized with other components in CTS-IFRCs, has direct and significant impacts on the char layer microstructure, flame retardancy and pyrolysis performance, these influences contributed to the double effects of TS as a blowing agent in gas phase flame-retardant mechanism, and as a carbon agent in condensed phase flame-retardant mechanism. High synergistic effects of natural-based TS revealed in this study have provided effective theoretical basis for emerging environmentally friendly bio-based flame-retardant materials and explored a new way for the utilization of TS.
摘要：
A colorimetric and visual assay is described for the herbicide aminotriazole (ATZ). It is based on the etching of gold nanorods (AuNRs) by iodine which is formed on oxidation of iodide via H2O2. Longitudinal etching of the AuNRs occurs quickly and is accompanied by a color change from dark blue to red. In the absence of ATZ and the presence of active catalase (CAT), H2O2 is quickly decomposed into water, and the AuNRs will not be etched. In the presence of ATZ, CAT is partially deactivated, and this affects the amount of available H2O2 and, consequently, of the iodine. Hence, the color is significantly changed. The color changes can be easily detected with bare eyes. The assay has a linear response in the 5 to 70 μM concentration range, with a detection limit of 1.3 μM and high selectivity for ATZ. It was applied to the determination of ATZ in water and food samples. Graphical abstractA multicolor colorimetric method is developed for aminotriazole (ATZ) detection based on catalase (CAT) deactivation-dependent longitudinal etching of gold nanorods (AuNRs). The color signals can be visually identified. Good detection performances and capability for evaluating ATZ level in water and food samples is demonstrated.
关键词：
Change;Cold storage;Degradation;Grass carp;Muscle protein
摘要：
The aim of present study was to evaluate the influence of cold storage on composition and properties of grass carp protein. The results show that muscle proteins of grass carp were degraded and underwent conformational changes when stored at 4 °C, and significant changes of the proteins content, as shown by the SDS-PAGE fingerprint, was observed after 6 days of storage. Protein’s surface hydrophobicity and total SH content increased during the first 4 days and then decreased gradually up to 10 days. The Ca 2+ -ATPase activity of protein decreased gradually during the storage period. The high MW proteins easily degraded during the cold storage, and the proteins with low MW were relatively stable but still gradually degraded. So the key time point for cold storage of grass carp is approximately 4-6 days. Copyright 2019 Zoological Society of Pakistan.
关键词：
Rice;Semidry-milling;Hot air treatment;Fissures;Qualities
摘要：
To investigate the effects of hot air treatment (HAT) on the quality attributes of Indica rice semidry-milling, HAT was applied at various temperatures (45-120 degrees C) and processing times (0-240 min). The changes in grain-surface cracking, moisture absorption rate, damaged starch, rheological properties, microbial decontamination, and texture qualities were evaluated. HAT induced many cracks in the rice grains, shortening the soaking time to reach maximum water content (28%) to 8 min. However, at high temperatures, extending the HAT time slowed the water absorption rate. Under the optimum HAT conditions and soaking time, the total viable counts in the rice flour were similar to those of dry-milled rice flour (10(2)-10(3) cfu/g), with no conforms and few yeasts and molds. The damaged starch content, rheological and texture properties were similar to those of wet-milling. Therefore, an appropriate HAT can shorten the soaking time of the rice and clean it during the milling process. (C) 2017 Elsevier Ltd. All rights reserved.
摘要：
An effective method has been developed for Rh(III)-catalyzed direct vinylation of arenes to give functionalized styrenes, using vinyltriethoxysilane as a convenient and inexpensive vinyl source. A wide variety of substrates, including 1-aryl-2-pyrrolidinones, anilines, benzamides and ketones, were compatible with this reaction. Moreover, this method can be applied to the two-step synthesis of functionalized indoles. Mechanistic investigation reveals that the reaction probably proceeds through an oxidative Heck/desilylation pathway.
摘要：
In the present work, we synthesis glycerol ether by the biomass glycerol. Then the blended fuel was prepared with ethanol, gasolines and glycerol ether. In addition, for the oxygen-containing materials, the distance matrix D based on molecular was modified by the sum of the molecular relative bond intensity matrix R-i and the branching parameter g(i). Then the single topological index X and the mixed topological index A were established. The quantitative structure-property relationship (QSPR) of the mixture topological index A and the physicochemical properties of the glycerol ether blended fuels such as density, kinematic viscosity, calorific value and cetane number was studied by linear regression method. The mixed topological index A can be fitted well with the physicochemical properties of biomass blended fuels, and the changes of the physical and chemical properties of the blended fuels can be well reflected by the four QSPR models.
摘要：
A ratiometric two-photon fluorescent probe for SO2 derivatives was first proposed based on acedan-merocyanine dyads via a TP-FRET strategy. It was successfully applied to visualization of the fluctuations of enzymatically generated SO2 derivatives in the mitochondria of HepG2 cells and rat liver tissues using two-photon fluorescence microscopy imaging.
期刊：
Journal of Power Sources,2016年329(Oct.15):553-557 ISSN：0378-7753
通讯作者：
Wang, Jiexi;Shih, Kaimin
作者机构：
[Peng, Wenjie; Liu, Zhaomeng; Yan, Guochun; Li, Xinhai; Wang, Jiexi] Cent S Univ, Sch Met & Environm, 932 Lushan South Rd, Changsha 410083, Hunan, Peoples R China.;[Li, Hangkong; Shih, Kaimin; Wang, Jiexi] Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China.;[Song, Liubin] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wang, Jiexi] C;[Wang, JX; Shih, K] U;Cent S Univ, Sch Met & Environm, 932 Lushan South Rd, Changsha 410083, Hunan, Peoples R China.;Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China.
关键词：
Lithium vanadium fluorophosphates;Cathode material;Lithium ion battery;Lithium phosphate coating;Interfacial stability
摘要：
To improve the stability of LiVPO4F electrode/electrolyte interface, Li3PO4 is used to modify LiVPO4F composite (P-LVPF) for the first time. Morphological characterization shows that LiVPO4F particles are wrapped by amorphous carbon and lithium ionic conductor Li3PO4 as the interlayer and outer layer, respectively. Compared to the pristine sample, the resultant P-LVPF exhibits greatly improved rate capability and elevated-temperature cycle performance when applied as the cathode material for lithium ion batteries. Specifically, the Li3PO4 modified sample specific capacity maintains 77.6% at 1 C after 100 cycles under 55 degrees C. Such improvement is attributed to the fact that the Li3PO4 coating layer not only acts as a good ionic conductor for LiVPO4F, but also serves as a physical barrier between electrode and electrolyte which can build a stable interface. (C) 2016 Elsevier B.V. All rights reserved.
摘要：
In present study, phase separation of soluble rice protein (SRP) and different polysaccharides were used to create specific structures with various structural and textural properties. The phase behavior and phase separation mechanism of mixtures of SRP and kappa-carrageen/dextran (25 degrees C, pH 7.0 and 0.1 mol/L NaCl) were investigated by means of phase diagram construction, confocal laser scanning microscopy (CLSM) and stress-controlled rheometry. Phase diagrams combined with CLSM indicated that entropic effects of depletion interaction were the main driving force behind the phase separation of soluble rice protein and polysaccharides. Results also demonstrated that electrostatic interaction played an important role in the observed phase separation. CLSM and frequency sweeps revealed the effective association among rice proteins and formation of network-like structures in the mixed systems. These findings suggest that controlled phase separation and gelation of mixed SRP/polysaccharide systems have potential to create rice protein foods with novel textural characteristics. (C) 2015 Elsevier Ltd. All rights reserved.
期刊：
Journal of Power Sources,2016年315(May 31):294-301 ISSN：0378-7753
通讯作者：
Wang, Jiexi
作者机构：
[Peng, Wenjie; Guo, Huajun; Liu, Zhaomeng; Wang, Zhixing; Yan, Guochun; Li, Xinhai; Wang, Jiexi] Cent S Univ, Sch Met & Environm, 932 Lushan South Rd, Changsha 410083, Peoples R China.;[Shih, Kaimin; Wang, Jiexi] Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China.;[Song, Liubin] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wang, Jiexi] C;Cent S Univ, Sch Met & Environm, 932 Lushan South Rd, Changsha 410083, Peoples R China.
关键词：
Molybdenum disulfide;Coating;Lithium vanadium fluorphosphate;Cathode material;Lithium ion battery
摘要：
To improve the electrochemical performance of LiVPO4F at room and elevated temperature focusing on the stability of LiVPO4F electrode/electrolyte interface, for the first time, MoS2 nanosheets are introduced to modify LiVPO4F/C composites. The coating of MoS2 layers on the surface of LiVPO4F/C nanoparticles is realized via a solution method followed by low-temperature calcination. Morphological observations present that the MoS2 sheets are homogeneously wrapped around the LiVPO4F/C particles. When employed as cathode materials for lithium ion batteries, the MoS2-modified LiVPO4F/C composites exhibit superior high-rate capability and greatly improved cycle ability compared to bare one, and the sample coated with 1.75 wt% MoS2 (2M-LVPF) delivers the best electrochemical performance. In particular, it maintains the capacity retention of 91.7% in 100 cycles at 2.0C and delivers a reversible specific capacity of 112 mAh g(-1) at a high rate of 8.0C under room temperature. More importantly, it shows greatly improved cycling stability at elevated temperature (55 degrees C), maintaining 88.1% of its initial capacity at 0.5C after 50 cycles. The reasons for such improvement lie in the MoS2 coating layer acting as a physical barrier between electrode and electrolyte, as well as electronic/ionic conducting framework for LiVPO4F particles. (C) 2016 Elsevier B.V. All rights reserved.
摘要：
Flash point is a primary property used to determine the fire and explosion hazards of a liquid. New group contribution-based models were presented for estimation of the flash point of alkanes by the use of multiple linear regression (MLR) and artificial neural network (ANN). This simple linear model shows a low average relative deviation (AARD) of 2.8% for a data set including 50 (40 for training set and 10 for validation set) flash points. Furthermore, the predictive ability of the model was evaluated using LOO cross validation. The results demonstrate ANN model is clearly superior both in fitness and in prediction performance. ANN model has only the average absolute deviation of 2.9 K and the average relative deviation of 0.72%.
