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| 1 | Preparation of SiO_2/TiO_2 Janus particles by electrostatic assembly,hydrolysis and calcination显示文摘This paper describes a novel chemical method for preparing SiO_2/TiO_2 Janus particles.First,polystyrene(PSt)/SiO_2 particles with a raspberry-like structure are prepared by electrostatic assembly.The influences of the reaction time of sulfonation and the treatment times of polyelectrolyte solutions(PDADMAC,PSS)on PSt and SiO_2 are investigated with respect to the surface charge density of the particles.SiO_2/TiO_2 Janus particles are then obtained by hydrolysis of butyl titanate on the surface of PSt/SiO_2 particles followed by a calcination process.Particle size analyzer,Zeta potential instrument,FTIR,TEM and SEM are used to characterize the particle size,the amount of charge on the surface of PSt and SiO_2 particles and the compositions and morphologies of PSt/SiO_2,SiO_2/TiO_2 and PSt/SiO_2/TiO_2.The diameters of the PSt,SiO_2,PSt/SiO_2 and SiO_2/TiO_2 particles are 2.0 μm,303 nm,2.7 μm and 330nm,respectively. | Baoliang Zhang Qiuyu Zhang Hepeng Zhang Xinlong Fan Dezhong Yin Xiangjie Li Wei Li | 2013 | Particuology2013，11，5： | 6 |
| 2 | Ultrasonic C-scan Detection for Stainless Steel Spot Welding Based on Wavelet Package Analysis显示文摘An ultrasonic test of spot welding for stainless steel is conducted. Based on wavelet packet decomposition, the ultrasonic echo signal has been analyzed deeply in time- frequency domain, which can easily distinguish the nugget from the corona bond. The 2D C-scan images produced by ultrasonic C scan which contribute to quantitatively calculate the nugget diameter for the computer are further analyzed. The spot welding nugget diameter can be automatically obtained by image enhancement, edge detection and equivalent diameter algorithm procedure. The ultrasonic detection values in this paper show good agreement with the metallographic measured values. The mean value of normal distribution curve is 0.006 67, and the standard deviation is 0.087 11. Ultrasonic C-scan test based on wavelet packet signal analysis is of high accuracy and stability. | 刘静 XU Guocheng 徐德生 ZHOU Guanghao FAN Qiuyue | 2015 | Journal of Wuhan University of Technology(Materials Science)2015，30，3： | 3 |
| 3 | Synthesis of PS/Ag asymmetric hybrid particles via phase separation and self-assembly显示文摘This article presents a facile approach to preparation of polystyrene/silver(PS/Ag) asymmetric hybrid particles.In this method,polystyrene/polyglycidyl methacrylate(PS/PGMA)Janus particles were synthesized via internal phase separation triggered by evaporation of dichloromethane(DCM) from PS/PGMA/DCMin water emulsion droplets.Then,the Janus particles were aminated and sequentially carboxylated to obtain PS/PCMA-NHO_2 and PS/PCMA-COOH particles.Ag*self-assembled on the surface of PGMA hemisphere of the functionalized PS/PCMA particles by coordinating with amine/carboxyl.PS/Ag asymmetric hybrid particles with 7.29 wt%of Ag were obtained by reduction of Ag^+.Scanning electron microscopy,energy-dispersive X-ray spectroscopy and transmission electron microscopy results confirmed that Ag was asymmetrically distributed on the surface of polymer particles. | Xinlong Fan Qiuyu Zhang Hepeng Zhang Baoliang Zhang Chunmei Li Xiangjie Li Xingfeng Lei | 2013 | Particuology2013，11，6： | 1 |
| 4 | Effect of spleen-invigorating, Qi-replenishing and blood-arresting formula on zebrafish models with simvastatin-induced hemorrhage caused by spleen failing to control blood, in terms of theory of Traditional Chinese Medicine显示文摘OBJECTIVE: To investigate the hemostasis effect of spleen-invigorating, Qi-replenishing and blood-arresting formula, on a zebrafish models with simvastatin-induced hemorrhage, and with symptom pattern caused by spleen failing to control blood, in terms of theory of Traditional Chinese Medicine(TCM).METHODS: In the first experiment, 60 AB strain wild type zebrafishes were randomly assigned into two groups: normal group and model group. The model group was treated with 50 μM simvastatinfor 24 h. The second experiment: The melanin allele mutated Albino strain zebrafishes were divided into normal, model, A group and B group. The observational parameters were as follows: blood flow, velocity of movement, hemorrhage ratio and improvement ratio of hemorrhage.RESULTS: Hemorrhage ratio: in the first experiment, brain hemorrhage ratio was 75%. In the second experiment, heart hemorrhage ratio was 65%.Blood flow: compared with the normal group,there was a significantly decrease in the model group(P < 0.001). Velocity of movement: in the first experimental, compared with the normal group,there was a significantly decrease in the model group(P < 0.001). Improvement ratio of hemorrhage: agents A had little effect in heart hemorrhage of the zebrafish; agents B could reduce heart hemorrhage ratio of the zebrafish, and increase the improvement ratio of hemorrhage.CONCLUSION: The manifestation of zebrafish model with simvastatin-induced hemorrhage is basically similar to that of the clinical symptom pattern caused by spleen's failure to control blood. The Spleen-invigorating, Qi-replenishing and Blood-arresting Formula can reduce the heart hemorrhage ratio of zebrafish induced by simvastatin, and increase the Improvement ratio of hemorrhage. | Gao Chong Wang Jun Wang Jia Zhu Xiaoyu Zhu Changle Guo Shengya Wang Chong Fan Qiuyue Zhang Jianuo Xia Bo Chen Xinyi | 2018 | Journal of Traditional Chinese Medicine2018，38，3： | 1 |
| 5 | Trends and Uncertainties in Surface Air Temperature over the Tibetan Plateau,1951–2013显示文摘Trends and uncertainties of surface air temperature over the Tibetan Plateau(TP)are evaluated by using observations at 100 meteorological stations during the period 1951–2013.The sampling error variances of gridded monthly data are estimated for every month and every grid box of data.The gridded data and their sampling error variances are used to calculate TP averages,their trends,and associated uncertainties.It is shown that large sampling error variances dominate northern and western TP,while small variances appear over southern and eastern TP.Every month from January to December has a positive linear trend during the study period.February has the largest trend of 0.34±0.18°C(10 yr)^(–1),and April the smallest at 0.15±0.11°C(10 yr)^(–1).The uncertainties decrease steadily with time,implying that they are not large enough to alter the TP warming trend. | Wei HUA Guangzhou FAN Yiwei ZHANG Lihua ZHU Xiaohang WEN Yongli ZHANG Xin LAI Binyun WANG Mingjun ZHANG Yao HU Qiuyue WU | 2017 | Journal of Meteorological Research2017，31，2： | 1 |
| 6 | A series of nanoparticles with phase-separated structures by 1,1-diphenylethene controlled one-step soap-free emulsion copolymerization and their application in drug release显示文摘A facile one-step approach to synthesize various phase-separated porous,raspberry-like, flower-like, core-shell and anomalous nanoparticles andnanocapsules via 1,1-diphenylethene (DPE) controlled soap-free emulsioncopolymerization of styrene (S) with glycidyl methacrylate (GMA), or acrylicacid (AA) is reported. By regulating the mass ratio of S/GMA, transparentpolymer solution, porous and anomalous P(S-GMA) particles could be produced.The P(S-GMA) particles turn from flower-like to raspberry-like and then toanomalous structures with smooth surface as the increase of divinylbenzene(DVB) crosslinker. Transparent polymer solution, nanocapsules and core-shellP(S-AA) particles could be obtained by altering the mole ratio of S/AA; anomalousand raspberry-like P(S-AA) particles are produced by adding DVB. Theunpolymerized S resulted from the low monomer conversion in the presence ofDPE aggregates to form nano-sized droplets, and migrates towards the externalsurfaces of the GMA-enriched P(S-GMA) particles and the internal bulk of theAA-enriched P(S-AA) particles. The nano-sized droplets function as in situporogen, porous P(S-GMA) particles and P(S-AA) nanocapsules are producedwhen the porogen is removed. This novel facile, one-step method with excellentcontrollability and reproducibility will inspire new strategies for creatinghierarchical phase-separated polymeric particles with various structures by simplyaltering the species and ratio of comonomers. The drug loading and releaseexperiments on the porous particles and nanocapsules demonstrate that therelease of doxorubicin hydrochloride is very slow in weakly basic environmentand quick in weakly acidic environment, which enables the porous particlesand nanocapsules with promising potential in drug delivery applications. | Xinlong Fan Jin Liu Xiangkun Jia Yin Liu Hao Zhang Shenqiang Wang Baoliang Zhang Hepeng Zhang Qiuyu Zhang | 2017 | Nano Research2017，10，9： | 0 |
| 7 | Self-assembly of metal-cholesterol oxidase hybrid nanostructures and application in bioconversion of steroids derivatives显示文摘A cholesterol oxidase(COD)was hybridized with Ca^(2+),Zn^(2+),Al^(3+),Fe^(2+) and Mn^(2+).After precipitation with PO_(4)^(3-) at 4℃ for 72 h,the resulting pellets were freeze-dried.In scanning electron microscopy assays,the metal-COD complexes revealed flower-like or granular structures after hybridization.Fourier transform infrared spectroscopy assay revealed the characteristic peaks of both the enzyme and metal materials.X-ray diffraction analysis indicated that COD was encapsulated in CaHPO_(4)·2H_(2)O-,Zn_(3)(PO_(4))_(2)·4H_(2)O-,AlPO_(4-),FeP_(4-) and Mn_(3)(PO_(4))_(2)·3H_(2)O-based nanostructures,respectively.Differential scanning calorimetry assay indicated significant increases in thermo-denaturation temperatures from 60.5℃ to 167.02℃,167.02℃,137.70℃,172.85℃ and 160.99℃,respectively.Using steroid derivatives as substrates,this enzyme could convert cholesterol,pregnenolone,dehydroepiandrosterone,ergosterol,b-sitosterol and stigmasterol to related single products.Hybridization in metal-based nanostructures could significantly enhance the initial conversion ratio and reaction stability of the enzyme.In addition,substrate selectivity could be affected by various metal materials.Briefly,using Ca^(2+),Zn^(2+),Al^(3+),Fe^(2+) and Mn^(2+) as hybrid raw materials could help to encapsulate COD in related metal-enzyme nanostructures,and could help to promote the stability and tolerant properties of the enzyme,while also enhancing its catalytic characteristics. | Yu Xin Qiuyue Gao Yu Gu Mengyao Hao Guangming Fan Liang Zhang | 2021 | Frontiers of Chemical Science and Engineering2021，15，3： | 0 |
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