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| 1 | Active corrosion protection of super-hydrophobic corrosion inhibitor intercalated Mg-Al layered double hydroxide coating on AZ31 magnesium alloy显示文摘Magnesium alloys,the advanced lightweight structural materials,have been successfully applied in the manufacturing field.Unfortunately,their poor corrosion resistance restrains the potential wide applications.In this work,anti-corrosion coatings were fabricated via the insitu growth of the corrosion inhibitors intercalated magnesium-aluminum layered double hydroxide(Mg-Al LDH)on AZ31 magnesium alloy and then post-sealing it by a super-hydrophobic coating.SEM,XRD,EDS,FTIR,XPS and contact angle test were conducted to analyze physical/chemical features of these coatings.Potentiodynamic polarization curves and electrochemical impedance spectroscopy were recorded to assess the anti-corrosion performance of prepared coatings.Surprisingly,Mg-Al LDH with molybdate intercalation and lauric acid modification achieves the excellent corrosion inhibition performance(99.99%)due to the multicomponent synergistic effect such as the physical protection of Mg-Al LDH,the corrosion inhibition of molybdate and super-hydrophobic properties of lauric acid.This work presents a scientific perspective and novel design philosophy to fabricate the efficient anti-corrosion coating to protect magnesium alloys and then expand their potential applications in other field. | Xin Wang Chuan Jing Yuxiang Chen Xiushuang Wang Gang Zhao Xing Zhang Liang Wu Xiaoying Liu Biqin Dong Yuxin Zhang | 2020 | Journal of Magnesium and Alloys2020，8，1： | 20 |
| 2 | Synthesis and mesomorphism of diacetylene-bridged triphenylene discotic liquid crystal dimers显示文摘Connecting two discotic mesogens via a spacer not only stabilizes the columnar mesophase but also leads to the formation of glass columnar phase, and therefore improves the physical properties of discotic liquid crystals as organic semiconductor. Here, we report the synthesis of eight diacetylene-bridged triphenylene discotic liquid crystal dimers, [C18H6(OCnH2n+1)4(OMe)O2C-C8H16-C≡≡ C-]2, 3(n), (n = 4-8), [C18H6(OC6H13)5O2C-C8H16-C≡≡ C-]2, 6 and [C18H6(OC6H13)5O-(CH2)m-C≡≡ C-]2, 8(m), (m = 1, 3) by Eglinton coupling reaction. The thermotropic liquid crystal properties were studied by differential scanning calorimetry and polarized optical microscopy. The results are showed as follows: the length of peripheral alkyl chains of triphenylene influenced properties of liquid crystal dimers; dimers 3(n) (n = 5-8) and 6 had glass columnar phase, and no crystallization was observed above -50℃ for all the triphenylene dimers; compared with 3(6), 6 showed higher molecular symmetry, more stable columnar mesophase and wider mesophase range. The connecting group, length and rigidity of spacer had important influence on the mesomorphism of diacetylene-bridged triphenylene discotic liquid crystal dimers. | JI Hong ZHAO KeQing YU WenHao WANG BiQin HU Pin | 2009 | Science China Chemistry2009，52，7： | 6 |
| 3 | Primary Establishment of the Tissue Culture Technique and Regeneration System for Ornamental Lupinns polyphyllus显示文摘The purpose of this paper is to develop a system for tissue culture and rapid propagation of two ornamental lupins,Minaretie and Russell Prize. In view of screening out the better explant regeneration and suitable culture medium,through adding hormone 6-BA,NAA and 2,4-D into MS and B5 basic culture medium,a series of experiments were carried out with the shoot tips,leaves,leaf petioles and stems from the asepsis seedling. The results showed that the shoot tips had favorableness on the rapidly propagation;MS+6-BA 0.5 mg · L-1 for f irst generation,the induction rate of Minaretie and Russell Prize was 90.5% and 95.86% respectivdy;Minaretie had the highest propagation index(6.35) on MS+6-BA 0.5 mg · L-1+NAA 0 mg · L-1+GA 30.8 mg · L-1+AC 2 g · L-1,but Russell Prize had the highest propagation index(7.24) on MS+6-BA 0.5 mg · L-1+NAA 0.15 mg · L-1+GA3 1.0 mg · L-1+AC 0.5 g · L-1;1/2 MS+NAA 0.25 mg · L-1 was the best rooting medium. The ratios of getting roots of Minaretie and Russell Prize were 94.78% and 96.32%,respectively. | WANG Xiaoling GAO Zhu LIU Tengyun YU Faxin WANG Biqin | 2009 | Journal of Northeast Agricultural University(English Edition)2009，16，3： | 5 |
| 4 | Phosphate limitation increases coenzyme Q10 production in industrial Rhodobacter sphaeroides HY01显示文摘Coenzyme Q10(CoQ10)is an important component of the respiratory chain in humans and some bacteria.As a high-value-added nutraceutical antioxidant,CoQ10 has excellent capacity to prevent cardiovascular disease.The content of CoQ10 in the industrial Rhodobacter sphaeroides HY01 is hundreds of folds higher than normal physiological levels.In this study,we found that overexpression or optimization of the synthetic pathway failed CoQ10 overproduction in the HY01 strain.Moreover,under phosphate-limited conditions(decreased phosphate or in the absence of inorganic phosphate addition),CoQ10 production increased significantly by 12%to220 mg/L,biomass decreased by 12%,and the CoQ10 productivity of unit cells increased by 27%.In subsequent fed-batch fermentation,CoQ10 production reached 272 mg/L in the shake-flask fermentation and 1.95 g/L in a 100-L bioreactor under phosphate limitation.Furthermore,to understand the mechanism associated with CoQ10 overproduction under phosphate-limited conditions,the comparatve transcriptome analysis was performed.These results indicated that phosphate limitation combined with glucose fed-batch fermentation represented an effective strategy for CoQ10 production in the HY01.Phosphate limitation induced a pleiotropic effect on cell metabolism,and that improved CoQ10 biosynthesis efficiency was possibly related to the disturbance of energy metabolism and redox potential. | Lu Zhang Leshi Liu Ke-Feng Wang Lan Xu Liming Zhou Weishan Wang Chuan Li Zheng Xu Tong Shi Haihong Chen Yuanhang Li Hui Xu XiuLiang Yang Zhichun Zhu Biqin Chen Dan Li Guanghuang Zhan Si-Liang Zhang Li-Xin Zhang Gao-Yi Tan | 2019 | Synthetic and Systems Biotechnology2019，4，4： | 2 |
| 5 | Synthesis of unsymmetric triphenylene discotic liquid crystals with a semi-fluorinated chain and the influence of fluorophobic effect on mesogenic behavior显示文摘The fluorophobic effect of the semi-fluorinated chain of discotic molecules efficiently improves the stability of columnar mesophase.Low symmetric discogens exhibit decreased melting points and wide mesophase ranges.A series of triphenylene derivatives 1,C18H6(OCnH2n+1)4(OMe)(O2CC2H4C6F13),and their hydrocarbon analogues 2,C18H6(OCnH2n+1)4(OMe)(O2CC8H17),n = 4―8,were synthesized for the investigation of the influence of semi-fluorinated peripheral chain and molecular symmetry on mesomorphism.The structures were characterized with 1H NMR and MS.The mesomorphism was studied with differential scanning calorimetry(DSC) and polarizing optical microscopy(POM).The results showed that all triphenylene derivatives exhibited enantiotropic columnar mesophase.The semifluorinated triphenylenes 1a―1e displayed higher melting points and clearing points than their hydrocarbon analogies 2a―2e.Most of them were in columnar mesophase at room temperature. | YANG GaoFan ZHAO KeQing YU WenHao HU Ping WANG BiQin | 2009 | Science China Chemistry2009，52，8： | 2 |
| 6 | Electrochemical impedance study on steel corrosion in the simulated concrete system with a novel self-healing microcapsule显示文摘 | Biqin Dong Yanshuai Wang Weijian Ding Shuting Li Ningxu Han Feng Xing Youyuan Lu | 2014 | Construction and Building Materials2014，，： | 1 |
| 7 | Preparation of microcellular poly(ethylene terephthalate)and its properties显示文摘 | Rong Guan Biqin Wang De ping Lu | 2003 | Journal of Applied Polymer Science2003，88，： | 1 |
| 8 | Microcellular thin PET sheet foam preparation by compression molding显示文摘 | Rong Guan Biqin Wang Deping Lu | 2004 | Journal of Applied Polymer Science2004，93，： | 1 |
| 9 | Preparation of Microcellular Poly (ethylene terephthalate) and Its Properties显示文摘 | Prong Guan Biqin Wang Deping Lu | 2003 | Journal of Applied Polymer Science2003，88，： | 1 |
| 10 | Synthesis of disk-rod-disk liquid crystal trimers by using click chemistry显示文摘A series of disk-rod-disk liquid crystal trimers were synthesized.CuI-NEt3 catalyzed alkyne azide cycloaddition in toluene at room temperature connected two triphenylene discogens to a biphenyl rod-shaped mesogen.The trimers were characterized by using 1H NMR,IR,and high resolution mass spectrometry.The mesomorphic properties were investigated using polarized optical microscopy(POM) ,differential scanning calorimetry(DSC) ,and wide-angle X-ray diffraction.The results showed that the trimers exhibited rectangular columnar mesophase(Colr) .The length of the flexible spacer connecting the three segments has prominent influence on the phase transition temperatures of the trimers. | Yu, WenHao Nie, ShiChang Bai, YueFeng Jing, Yang Wang, BiQin Hu, Ping Zhao, KeQing | 2010 | Science China Chemistry2010，53，5： | 1 |
| 11 | Pore structure analysis on hardened paste of CaO-Al2O3-P2O5cement显示文摘 | Wang Xiaodong Ding Zhu Dong Biqin | 2014 | Key Engineering Materials2014，591，： | 1 |
| 12 | Synthesis of functionalized triphenylene discotic liquid crystals and the influence of unsaturated periphery on mesomorphism显示文摘Twelve triphenylene discogens with unsaturated periphery (abbreviated as C18H6(OC5H11)6-x(OR)x(x=1,2,3), R=-C3H6CH==CH2(a),-C3H6C≡CH(b),-C2H4OCH==CH2(c)) were synthesized and characterized. The thermotropic liquid crystal prop-erties were studied by using polarized optical microscopy, differential scanning calorimetry and X-ray diffractometry. The results showed that all triphenylenes exhibited hexagonal columnar mesophase. The thermotropic studies showed that series a (alkene periphery) exhibited higher clearing points than the corresponding series b (alkyne periphery), while series c (vinyloxy periphery) exhibited highest clearing points and widest mesophase temperature ranges. We also found that the symmetric discogens sym-C18H6(OC5H11)3(OR)3 displayed higher melting points and clearing points than the asymmetric ones asym-C18H6(OC5H11)3(OR)3. | ZHAO KeQing ZHOU Hui YU WenHao HU Ping WANG BiQin MONOBE Hirosato SHIMIZU Yo | 2011 | Science China Chemistry2011，54，10： | 1 |
| 13 | Preparation of Microcelhdar Poly ( ethylene terephthalate ) and Its Properties 显示文摘 | Guan Rong Wang Biqin Lu Deping | 2003 | Journal of Applied Polymer Science2003，88，： | 1 |
| 14 | Microcellular thin PET sheet foam preparation by compression molding 显示文摘 | GUAN Rong WANG Biqin LU Deping | 2004 | J Appl Polym Sci2004，93，4： | 1 |
| 15 | Synthesis of naphthalene derivatives through inexpensive BF_3·Et_2O-catalyzed annulation reaction of arylacetaldehydes with arylalkynes显示文摘An inexpensive BF3·Et2O-catalyzed annulation reaction of arylacetaldehydes with arylalkynes has been developed. Various substituted phenylacetaldehydes and phenylacetylenes can undergo this reaction, producing corresponding α-aryl substituted naphthalene derivatives. Use of inexpensive and readily available BF3 ·Et2O catalyst constitutes the most attractive advantage of this transformation. | XIANG ShiKai HU Hao MA Jing LI YuanZhuo WANG BiQin FENG Chun ZHAO KeQing HU Ping CHEN XiaoZhen | 2013 | Science China Chemistry2013，56，7： | 0 |
| 16 | Screening and engineering of high-activity promoter elements through transcriptomics and red fluorescent protein visualization in Rhodobacter sphaeroides显示文摘The versatile photosyntheticα-proteobacterium Rhodobacter sphaeroides,has recently been extensively engineered as a novel microbial cell factory(MCF)to produce pharmaceuticals,nutraceuticals,commodity chemicals and even hydrogen.However,there are no well-characterized high-activity promoters to modulate gene transcription during the engineering of R.sphaeroides.In this study,several native promoters from R.sphaeroides JDW-710(JDW-710),an industrial strain producing high levels of co-enzyme Q10(Q10)were selected on the basis of transcriptomic analysis.These candidate promoters were then characterized by using gusA as a reporter gene.Two native promoters,Prsp_7571 and Prsp_6124,showed 620%and 800%higher activity,respectively,than the tac promoter,which has previously been used for gene overexpression in R.sphaeroides.In addition,a Prsp_7571-derived synthetic promoter library with strengths ranging from 54%to 3200%of that of the tac promoter,was created on the basis of visualization of red fluorescent protein(RFP)expression in R.sphaeroides.Finally,as a demonstration,the synthetic pathway of Q10 was modulated by the selected promoter T334*in JDW-710;the Q10 yield in shake-flasks increased 28%and the production reached 226 mg/L.These well-characterized promoters should be highly useful in current synthetic biology platforms for refactoring the biosynthetic pathway in R.sphaeroides-derived MCFs. | Tong Shi Lu Zhang Mindong Liang Weishan Wang Kefeng Wang Yue Jiang Jing Liu Xinwei He Zhiheng Yang Haihong Chen Chuan Li Dongyuan Lv Liming Zhou Biqin Chen Dan Li Li-Xin Zhang Gao-Yi Tan | 2021 | Synthetic and Systems Biotechnology2021，6，4： | 0 |
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