|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Characterization and cloning of a brittle culm mutant (bc88) in rice (Oryza sativa L.)显示文摘This study characterizes a brittle culm (bc88) mutant of rice (Oryza sativa L.) obtained by ethylene methylsulfonate (EMS)-induced mutagenesis of Wuyunjing 7. The bc88 mutant exhibits a diversity of pleiotropic phenotypes, including brittle culm at the whole-plant growth stages, withered leaf tips at the seedling stage, and 18-d delay in heading date at the mature stage. Genetic analysis indicates that the bc88 mutant is controlled by a single recessive nuclear gene. The mutated bc88 gene isolated by map-based cloning contains only one point mutation in the 5th exon relative to its wild-type BC88 (LOC_Os09g25490 and Os09g0422500), leading to an amino acid change from P to L in bc88 plants. Alignment of the putative protein sequence with its homologs indicates that the mutation is located in the conserved region of the sequence. Detection of the transcription level of BC88 in rice plants shows that the expression level of BC88 is higher in spikes and culms than in leaves, roots, and leaf sheaths. These contribute to understanding of the molecular mechanism of cellulose synthesis. The target gene BC88 can be a useful tool in molecular marker-assisted selection for rice culm trait breeding. | RAO YuChun YANG YaoLong XIN DeDong LI XiaoJing ZHAI KaiEn MA BoJun PAN JianWei QIAN Qian ZENG DaLi | 2013 | Chinese Science Bulletin2013，58，24： | 11 |
| 2 | Secondary Crystallization of Na_2CO_3-Modified HZSM-5 Zeolites with Tetrapropylammonium Hydroxide and Their Catalytic Performance in Thiophene Alkylation Reaction显示文摘The Na2CO3-modified HZSM-5 zeolites were further treated by tetrapropylammonium hydroxide(TPAOH) solution. The effect of TPAOH concentration on the secondary crystallization process was investigated. The resulting samples were characterized by a complementary combination of X-ray diffraction, N2 adsorption/desorption, scanning electron microscopy, X-ray fluorescence spectroscopy, XPS, 27 Al and 29 Si magic-angle spinning nuclear magnetic resonance spectroscopy, BET and temperature-programmed desorption techniques. The results showed that the secondary crystallization of the HZSM-5 zeolite could result in migration of non-framework species from the internal channels to the zeolite surface and their transformation into framework species. The catalytic activity of these modified samples for thiophene alkylation was evaluated. Both the activity and stability of the catalysts were improved after secondary crystallization. | Liu Dongmei Kong Feifei Zhai Yuchun Wang Haiyan | 2015 | China Petroleum Processing & Petrochemical Technology2015，17，3： | 10 |
| 3 | Solidification Behavior and Segregation of Re-containing Cast Ni-base Superalloy with Different Cr Content显示文摘The effect of chromium(Cr) on solidification and segregation behavior of Re-containing cast Ni-base superalloys was investigated by optical microscopy(OM),scanning electron microscopy(SEM) and electronic probe micro analysis(EPMA).The results show that Cr has significant effect on solidification and segregation behavior of Re-containing cast Ni-base superalloys.The liquidus and solidus of alloy decrease with increasing Cr in alloys.The segregation coefficient(K) of Mo increases and that of W and Re decreases gradually with increasing Cr element. | Xiurong Guan Enze Liu Zhi Zheng Yongsi Yu Jian Tong Yuchun Zhai | 2011 | Journal of Materials Science & Technology2011，27，2： | 9 |
| 4 | Mineral Transition of Calcium Aluminate Clinker during High-Temperature Sintering with Low-lime Dosage显示文摘The mineral transition mechanism and physicochemical property of calcium aluminate clinker sintered at 1350 ℃ were systematically studied using analytical reagent α-Al_2O_3,CaCO_3 and SiO_2 when the molar ratio of CaO to Al_2O_3 is 1.0.The results show that the formation of Ca_2SiO_4 accelerates the diffusion of CaO and Al_2O_3,which promotes the formation of CaAl_2O_4 determined by dilatometer,X-ray diffraction,Fourier transform infrared spectroscopy and scanning electron microscopy methods.CaAl_4O_7,Ca_3Al_2O_6,Ca_3SiO_5 and Ca_2Al_2SiO_7 only exist in the initial stage of reactions,the amounts of which decrease with the increase of sintering duration.Ca_3Al_2O_6 and Ca_(12)Al_(14)O_(33) react with Al_2O_3 and CaAl_4O_7 to form CaAl_2O_4,while Ca_2Al_2SiO_7 reacts with CaO and Ca_(12)Al_(14)O_(33) to form Ca_2SiO_4 and CaAl_2O_4.The sintered clinker contains CaAl_2O_4 and γ-Ca_2SiO_4 as well as some Ca_(12)Al_(14)O_(33) when the sintering duration is longer than 1.0 h.The differential scanning calorimetry results reveal that Ca_2SiO_4,Ca_2Al_2SiO_7 and CaAl_2O_4 are formed at985 ℃,1045℃ and 1339 ℃,respectively.Increasing the sintering duration contributes to the transition of β-Ca_2SiO_4 to γ-Ca_2SiO_4,which improves the pulverization and alumina leaching property of the sintered clinker. | Di Zhang Xiaolin Pan Haiyan Yu Yuchun Zhai | 2015 | Journal of Materials Science & Technology2015，31，12： | 7 |
| 5 | Preparation of Monodisperse Spherical SiO_2 by Microwave Hydrothermal Method and Kinetics of Dehydrated Hydroxyl显示文摘Monodisperse spherical SiO2 particles were successfully synthesized in 2-propanol-H2O-NH3 system by the microwave hydrothermal method using ammonia as catalyst. To investigate the influences on the size of spherical SiO2 particles, factors such as ammonia concentration, reaction temperature, stirring intensity and reactants mol ratio have been studied. The orthogonal experiments were carried out. The as-prepared SiO2 particles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and differential thermal analysis (DTA). The results indicated that the size of SiO2 particles increased greatly with the increase in ammonia concentration, temperature and reactants mol ratio, but increased slightly with the increase in stirring intensity. Monodisperse spherical SiO2 particles were amorphous with perfect sphere and uniform size. Hydroxyl was detected in SiO2. Kinetic parameters were calculated, and finally the reaction rate equation of dehydrated hydroxyl was obtained. | Xiaoyi Shen Yuchun Zhai Yang Sun Huimin Gu | 2010 | Journal of Materials Science & Technology2010，26，8： | 5 |
| 6 | Synthesis and photocatalytic performance of ZnO with flower-like structure from zinc oxide ore显示文摘Employing zinc sulfate solution obtained from zinc oxide ore as raw material,sodium hydroxide as precipitant and PEG20000 as dispersant,ultrafine ZnO powders with different morphologies were successfully synthesized through hydrothermal method.The influences of the dosage of PEG20000 solution,molar ratio of OH-/Zn2+,reaction temperature,reaction time and Zn2+concentration on the structures and morphologies of the ZnO powders were discussed in detail.The reaction conditions of synthesizing ZnO powders with flower-like structure were obtained as below:dosage of PEG20000 with 10%mass fraction 5 mL,molar ratio of OH-to Zn2+5,reaction temperature 150℃,reaction time 8 h at Zn2+concentration1 mol L-1.The growth mechanism of ZnO particles with different morphologies was proposed.The ZnO powder with flower-like structure are composed of multiple micro-rods with hexagon morphology and has good photocatalytic degradation ability to degrade Rh B.20 mL Rh B solution with 15 mgL-1 could be completely degraded over flower-like ZnO powder 300 mg within 3 h. | Xiaoyi Shen Hongmei Shao Yan Liu Yuchun Zhai | 2020 | Journal of Materials Science & Technology2020，47，16： | 5 |
| 7 | PREPARATION OF Al-Sc ALLOY IN CHLORIDE SYSTEM WITH MOLTEN SALT ELECTROLYSIS显示文摘INTRODUCTIONScandiumposesesexcelentphysicochemicalproperties.WhenalitleofScisaddedintoAlaloy,thestrengthandhardnesofAlaloyca... | Tian Yanwen, Sun Benliang and Zhai Yuchun School of Materials & Metallurgy, Northeastern University, Shenyang 110006, P.R.China | 1998 | 中国有色金属学会会刊:英文版1998，8，4： | 3 |
| 8 | Al Preparation from Solid Al_2O_3 by Direct Electrochemical Deoxidation in Molten CaCl_2-NaCl at 550℃显示文摘Al was prepared by a new method in molten salt at low temperature.Sintered alumina pellets were used as cathode;graphite rod was employed as anode;and the molten CaCl2-NaCl was the electrolyte.A constant 3.2 V voltage was applied in this experiment,and oxygen in solid alumina cathode was reduced by direct electrochemical deoxidation at 550℃.In this process,the current gradually decreased with increasing time and the alumina pellets became grey and porous.The metallic particles were obtained and characterized by XRD(X-ray diffraction) and SEM(scanning electron microscopy). | Hongwei Xie He Zhang Yuchun Zhai Jinxia Wanga Chengde Li | 2009 | Journal of Materials Science & Technology2009，25，4： | 3 |
| 9 | Preparation of Al_3Sc Intermetallic Compound by FFC Method显示文摘The FFC Cambridge process is a direct electrodeoxidation process used to reduce metal oxides for metals or alloys in molten salts.Al-Sc compound oxides are used as a precursor which formed upon blending and sintering Al2O3,Sc2O3 and Al powders and are successfully reduced by using the FFC Cambridge process at 973 K with a constant cell voltage of-3.2 V.This method is applied to the preparation of fine Al3Sc particles, which can give another new view for aluminum industry. | Xianjie Liao Hongwei Xie Yuchun Zhai Yi Zhang | 2009 | Journal of Materials Science & Technology2009，25，5： | 2 |
| 10 | Shape-controllable Synthesis of Ultrafine ZnO Powders of Different Morphologies显示文摘By employing zinc acetate and sodium hydroxide as raw materials, ultrafine ZnO powders with different morphologies were successfully synthesized through hydrothermal method. The influences of the reaction temperature, the OH-/Zn2+ mol ratio and the reaction time on the morphologies of the ZnO powders were discussed. The reaction conditions were obtained, under which the ZnO of flower-like particles, micro-rods and flake particles was synthesized, respectively. The crystal structures and morphologies of those ZnO particles were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The ZnO with flower-like structures was composed of lots of micro-rods with hexagon morphology. The XRD patterns indicated that the ZnO powders were hexagonal wurtzite structures with high purity. Finally, the growth mechanism of the ZnO particles was discussed. | Xiaoyi Shen Yuan Liang Yuchun Zhai Zhiqiang Ning | 2013 | Journal of Materials Science & Technology2013，29，1： | 2 |
| 11 | Preparation of chain copper oxide nanoparticles by microwave显示文摘Cu(OH)2 nano-fibers were prepared by chemical precipitation with CuSO4·5H2O and NaOH as raw materials. The Cu(OH)2 nano-fibers have a diameter of 10-30 nm and a length of 1-6 μm. The reaction conditions were as follows: the concentration of CuSO4 solution was 0.1 mol·L-1,NaOH solution 4 mol·L-1,the dropping rate of the NaOH solution 50 mL·min-1,the reaction temperature 20°C,the pH value of the reaction terminal 13,and the stirring rate 1200 r·min-1. The chain nano-CuO grains were obtained through the microwave radiation of the Cu(OH)2 nano-fibers. | LI Zaiyuan LIU Yan GONG Panwei ZHAI Yuchun | 2007 | Rare Metals2007，26，5： | 2 |
| 12 | Study on experiment and mechanism of thermal dissolved sulfuration of low grade lead-zinc oxide ore in lanpin显示文摘The thermal dissolved sulfuration technology is brought forward and performed based on the characteristic of low grade lead-zinc oxide ore in lanpin.Using sulfur as the sulphidizing agent in the experiment,the oxides in the sandstone and ignimbrite are changed into sulfides.The disproportionation reaction of sulfur in a solution is confirmed as 4S+3H2O=2S2-+S2O32-+6H+.The dynamics process is studied and the first-order reaction rate equation-1n(1-α)=ktt is obtained.The effects of the reactive products,stirring speed,dosage of sulfuration agent,value of pH and sulphidizing temperature on the sulfuration of oxide ore are investigated.The results indicate that the reactive apparent activation energy is 100.8 kJ/mol and the sulfu-ration ratio of lead-zinc oxide ore reaches 60% under the conditions of pH 5.9-7.5,the sulfuration temperature of 130 °C,sulfuration time of 180 min and the stirring speed of 800 r/min. | Minghua JIANG Bin YANG Jijun WU Yuchun ZHAI Yang ZHOU | 2009 | Acta Metallurgica Sinica(English Letters)2009，22，4： | 2 |
| 13 | Strategies for CO2 capture from different CO2 emission sources by vacuum swing adsorption technology显示文摘Different VSA(Vacuum Swing Adsorption) cycles and process schemes have been evaluated to find suitable process configurations for effectively separating CO2 from flue gases from different industrial sectors. The cycles were studied using an adsorption simulator developed in our research group, which has been successfully used to predict experimental results over several years. Commercial zeolite APGIII and granular activated carbon were used as the adsorbents. Three-bed VSA cycles with- and without-product purge and 2-stage VSA systems have been investigated. It was found that for a feed gas containing 15% CO2(representing flue gas from power plants), high CO2 purities and recoveries could be obtained using a three-bed zeolite APGIII VSA unit for one stage capture, but with more stringent conditions such as deeper vacuum pressures of 1–3 k Pa. 2-stage VSA process operated in series allowed us to use simple process steps and operate at more realistic vacuum pressures. With a vacuum pressure of 10 k Pa, final CO2 purity of 95.3% with a recovery of 98.2% were obtained at specific power consumption of 0.55 MJ·(kg CO2)-1from feed gas containing15% CO2. These numbers compare very well with those obtained from a single stage process operating at1 k Pa vacuum pressure. The feed CO2 concentration was very influential in determining the desorption pressure necessary to achieve high separation efficiency. For feed gases containing N 30% CO2, a singlestage VSA capture process operating at moderate vacuum pressure and without a product purge, can achieve very high product purities and recoveries. | Jianghua Ling Penny Xiao Augustine Ntiamoah Dong Xu Paul Webley Yuchun Zhai | 2016 | Chinese Journal of Chemical Engineering2016，24，4： | 2 |
| 14 | Experiment on iron scrap reduction by adding waste plastics into scrap column显示文摘 | Shuwen Chen Chongmon Zhang Yuchun Zhai | 2004 | JMST2004，，： | 1 |
| 15 | Synthesis and character of spinel LiMn2O4显示文摘 | Xu Chaqing Tian Yanwen Zhai Yuchun | | 0，，： | 1 |
| 16 | Reaction kinetics of roasting high-titanium slag with concentrated sulfuric acid 显示文摘 | Sui Lili Zhai Yuchun | 2014 | Transactions of Nonferrous Metals Society of China2014，24，： | 1 |
| 17 | 显示文摘 | Mao Jing Dai Kehua Zhai Yuchun | 2012 | Electrochimica Acta2012，63，2： | 1 |
| 18 | Tribological Behaviors of Ni_3Al Intermetallics with MoO_3 Multilayer Ribbon Crystal Prepared by Spark Plasma Sintering显示文摘This study reports that small amounts of MoO_3 multilayer ribbon crystal(MoO_3MLRC) in Ni_3Al intermetallics showed the decreased friction coefficients and improved wear resistance at different contact loads. Specifically, the friction coefficients(0.32–0.34) and wear rates [(2–4) × 10^(-5)mm3N^(-1)m^(-1)] are significantly reduced for Ni_3Al at 2–8 N. A possible explanation for the friction and wear reduction is that MoO_3 MLRC as a multilayer material shears easily in the tribo-layer during the sliding contact, and provides low friction. In addition, this MoO_3 MLRC with excellent bending strength is found to dissipate shear stress and suppress severe plastic deformation under a cyclic stress, thus drastically improving wear resistance of Ni_3Al. | Wenzheng Zhai Xiaoliang Shi Kang Yang Yuchun Huang Liping Zhou Wenlong Lu | 2017 | Acta Metallurgica Sinica(English Letters)2017，30，6： | 1 |
| 19 | A Green Process for Recovering Nickel From Nickeliferous Laterite Ores显示文摘 | Zhai Yuchun Mu Wenning Liu Yan | | 0，，1： | 1 |
| 20 | Performance of SBR-Modified Asphalt Yufeng Cong显示文摘 | Yufeng Cong Kejian Liao Wei Huang Yuchun Zhai | 2006 | Petroleum Science and Technology2006，，10： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员