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JIA YuPing GUO LiWei LU Wei GUO Yu LIN JingJing ZHU KaiXing CHEN LianLian HUANG QingSong HUANG Jiao LI ZhiLin CHEN XiaoLong 《中国科学:物理学 力学 天文学(英文版)》2014,(5):1004
<正>Addendum to:Science China:Physics,MechanicsAstronomy,2013,56(12):2386–2394doi:10.1007/s11433-013-5348-2The legends of the following Figures should be as follows:Figure 3 AFM morphologies and Raman spectra of a EG on a 2 inch SiC(0001)measured at five representative regions.(a)AFM Morphology reproduced from ref.[14]with permission from Science China Press and Springer publishing,(b)Raman spectra.Figure 6 SEM images of the VAGS.(a)Cross-section image of the VAGS;(b)and(c)are the top view images of the as-grown VAGS and the VAGS after top graphene layer removed reproduced from ref.[16]with permission from Wiley-VCH publishing. 相似文献
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Haigang Li JingJing Huo Dan Sun Yong Guo Liang Jiang Haijuan Zhang Xiaowei Shi Zhilong Zhao Jinchuan Zhou Chunlan Hu Chun Zhang 《Electrophoresis》2021,42(6):693-699
Polyethylene glycol-modified canine uricase (PEG-UHC) was prepared by modifying the ε-amino group of lysine residues on the canine uricase (UHC) protein to near-saturation with 5 kDa monomethoxyl-polyethylene glycol succinimide (mPEG-SPA-5k). In order to accurately determine the PEGylation uniformity of PEG-UHC, CZE, 3–8% gradient gel SDS-PAGE, and imaging CIEF (iCIEF) analyses were compared. CZE could not effectively separate PEG-UHC proteins with different degrees of modification, 3–8% gradient gel SDS-PAGE could separate PEG-UHC into seven gel bands; however, most of the gel bands were smeared or blurred, and the separation of PEG-UHC samples by iCIEF was significantly better than that by 3–8% gradient gel SDS-PAGE. Under denatured conditions, iCIEF separated 12 pI peaks, and could also accurately quantify the relative monomer PEG-UHC content. More than 85% of the total monomeric PEG-UHC was conjugated with 7–12 PEG molecules; of this 85%, approximately 40% was conjugated with 9–10 PEG molecules. These results demonstrated that iCIEF exhibits good potential for determining the PEGylation homogeneity of PEGylated protein drugs. 相似文献
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JIA YuPing GUO LiWei LU Wei GUO Yu LIN JingJing ZHU KaiXing CHEN LianLian HUANG QingSong HUANG Jiao LI ZhiLin CHEN XiaoLong 《中国科学:物理学 力学 天文学(英文版)》2013,56(12):2386-2394
Using novel ideas for the fabrication of epitaxial graphene(EG)on SiC,two forms of graphene termed as vertical aligned graphene sheets(VAGS)and graphene covered SiC powder(GCSP)were derived,respectively,from SiC slices and SiC powder,aimed for applications in energy storage and photocatalysis.Herein,the fabrication procedures,morphology characteristics,some intrinsic physical properties and performances for applications in field effect transistor(FET)and cold cathode field emission source are revealed and analyzed based on the graphene materials.The EG on a 2-inch SiC(0001)showed an average sheet resistance about 720/with a non-uniformity 7.2%.The FETs fabricated on the EG possessed a cutoff frequency 80GHz.Based on the VAGS derived from a completely carbonized SiC slice,a magnetic phase diagram of graphene with irregular zigzag edges is also reported. 相似文献
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Jun Feng YanLin Ye Biao Yang ChengJian Lin HuiMin Jia DanYang Pang ZhiHuan Li JianLing Lou QiTe Li XiaoFei Yang Jing Li HongLiang Zang Qiang Liu Wei Jiang ChenGuang Li Yang Liu ZhiQiang Chen HongYi Wu ChunGuang Wang Wei Liu Xiang Wang JingJing Li DiWen Luo Ying Jiang ShiWei Bai JinYan Xu NanRu Ma LiJie Sun DongXi Wang 《中国科学:物理学 力学 天文学(英文版)》2019,(1)
The inelastic excitations and cluster decay of ~(13)C have been measured using the reaction,9Be(~(13)C, ~(13)C* →~9Be + α)~9Be. We observe strong excitation to the 14.3-MeV(1/2-) resonant state from the cluster-decay channel, leading to an enhanced monopole matrix element of(6.3 ± 0.6) fm~2. This large cluster-related monopole strength is a clear indication of the cluster-structure domination of this state and is consistent with the recent prediction of the orthogonality condition model(OCM). It would be interesting to further explore the three-center molecular rotational band that is initiated from the observed band-head. 相似文献
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Organophosphates (OPs) have been widely used as pesticides,insecticides or even chemical warfare agents.Acetylcholinesterase (ACHE) inhibition has been employed to develop verious assay methods for detection of pesticides with the advantages of low cost,simple procedure and quick assay time.The study of acetylcholinesterase (ACHE) activity and OPs inhibition in the solution containing organic solvent is extremely important owing to poor solubility of Ops in water and a higher solubility in organic solvents. 相似文献
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TUNG ChenHo 《中国科学B辑(英文版)》2009,(6)
Imine-bridged TTF-π-pyridine derivatives, 2NTTF, 3NTTF and 4NTTF, were synthesized and the cation-binding study was performed. It is noted that with the addition of the micromolar concentration of Pb2+ to the solution, these compounds display remarkable changes in solution color, 1H NMR spectra and electrochemical properties. The nitrogen atom of the imine-bridge in 2NTTF not only serves as a π-conjugated spacer but also participates in the sensing and coordinating properties. 相似文献
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ZHOU JingJing ZHOU WeiWei GUAN ChunMei SHEN JingQin OUYANG ChuYing LEI MinSheng SHI SiQi & TANG WeiHua 《中国科学:物理学 力学 天文学(英文版)》2012,(8):1376-1382
Lithium intercalated bilayer graphene has been investigated using first-principles density functional theory calculations. Results show that there exist AB and AA stacking sequences for bilayer graphene in which the latter is more favorable for the Li storage and the former will evolve into the latter with the intercalation of Li ions. The relationship between the interlayer distance of two graphene sheets and the intercalated capacity of Li ions is discussed. It is found that structural defect is identified to store Li ions more favorably than pristine bilayer graphene and an isolated C atom vacancy in bilayer graphene can capture three Li ions between two graphene sheets. 相似文献
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本文报道了有机分子BBOT(2,5-bis(5′-tert-butyl-2-benzoxazoyl)thiophene)与α-、β-、γ-环糊精(cyclodextrins,CDs)的相互作用.BBOT可以与这3种环糊精进行不同方式的组装:BBOT与α-CD形成1:2(客体:主体)包合物;当BBOT浓度较低时与β-CD形成1:1包合物,浓度较高时则与β-CD形成纳米管及二次组装体;对于γ-CD而言,在我们所研究的BBOT浓度范围内都可与其形成纳米管及二次组装体.研究发现,BBOT-β-CD纳米管和BBOT-γ-CD纳米管的结构存在一定差异. 相似文献
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A highly soluble poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid)/Au (PEDOT-PSS/Au) nanocomposite was prepared via one-step chemical synthesis and the matrix was characterized by UV-vis spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM) and transmission electron microscope (TEM). Due to the excellent aqueous compatibility and biocompatibility, the PEDOT/PSS-Au nanocomposite can be used as biomaterial for enzymes immobilization. In this system, redox enzyme, horseradish peroxidase (HRP) was integrated with PEDOT/PSS-Au nanocomposite and the direct electron transfer of HRP was observed. Moreover, we find that the HRP/PEDOT-PSS/Au modified electrode shows excellent electrocatalytic ability for H2O2 and the formal Michaelis-Menten constant was 0.78 mmol/L. The response currents have good linear relation with the concentrations of H2O2 with a linear range from 2.0 × 10−7 to 3.8 × 10−4 mol/L. 相似文献