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37篇 您的检索式:作者名="Zhao Shuchun"
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1Early evaluation of growth traits of Larix kaempferi clones显示文摘Early selection is an important method to shorten the breeding cycle for tree species, which may differ in the time for early selection.To evaluate the early selected time for Larix kaempferi, tree height and diameter at breast height of 57 L.kaempferi clones were measured over many different growth years.The results indicated that, except for age × clone interaction for diameter at breast height(P = 0.741), there were significant differences among all variation sources(P < 0.01).The coefficient of phenotypic variation ranged from 14.89 to 35.65%for height and from 19.17 to 23.86% for diameter at breast height in different growth years.The repeatability of height and of diameter at breast height among clones was high,ranging from 0.6181 to 0.8531(height) and from 0.8443 to0.8497(diameter at breast height), in different growth years.There were significant positive correlations between all pairs of growth traits except between height in the 2 nd growth year and height in the 30 th growth year; and between height in the 2 nd growth year × diameter at breast height in the 30 th growth year.With a comprehensive evaluation method and a selection ratio of 10%, L65,L1, L62, L9, L15, and L78 were selected as excellent clones in the 30 th growth year.Their average values of height and diameter at breast height were 9.81 and 16.57%higher than the overall average, representing genetic gains of 6.46 and 13.99%, respectively.This study provides a theoretical foundation for the genetic improvement of L.kaempferi.Yanyan Pan Shuchun Li Chenglu Wang Wenjun Ma Guiyou Xu Lili Shao Kailong Li Xiyang Zhao Tingbo Jiang 2018Journal of Forestry Research2018,29,4:10
2Effects of Nitrogen Rate and Split Application Ratio on Nitrogen Use and Soil Nitrogen Balance in Cotton Fields显示文摘The Yellow River valley is one of the three largest cotton production areas in China.An experiment was performed in cotton fields of Anyang,China from 2013 to 2014 to investigate the effects of nitrogen(N) application rate and the ratio between basal and topdressing N fertilizer on N balance in a soil-plant system,N use efficiency,and cotton yield.Five N application rates as treatments were applied with the same split application ratio.Half of the N(50% basal fertilizer) was applied at pre-planting and the other half(50% topdressing fertilizer) at the initial flowering stage.These treatments were:zero N(N0,control),90 kg N ha^(-1)(N90(5/5)),180 kg N ha^(-1)(N180(5/5)),270 kg N ha^(-1)(N270(5/5),a reduced N rate),and 360 kg N ha^(-1)(N360(5/5),a conventional N rate).Additional 2 split application ratios as treatments were applied with the same N rate of 270 kg N ha^(-1).The split application ratios between basal N and topdressing N were 30%:70%(N270(3/7)) and 70%:30%(N270(7/3)).Results demonstrated that soil NH_4-N content in the 0–60 cm layer and NO3-N content in the 0–20 cm layer increased with increased N rate at the squaring and boll-opening stages and then decreased to lower levels at the initial flowering and harvest stages.Soil NO_3-N content in the 20–60 cm layer after the initial flowering stage increased with the increase of topdressing N rate.Soil apparent N surplus varied at different growth stages,while the soil apparent N surplus over the entire growth period exhibited a positive relationship at N rates over 180 kg ha^(-1).Seed cotton yield of N270(3/7) was the highest of all treatments.Plant N uptake,N agronomic efficiency,and apparent N recovery efficiency of N270(3/7) were significantly higher than those of N270(5/5) and N270(7/3) in both growing seasons.These suggest both economic and ecological benefits in cotton production in the Yellow River valley could be created,by appropriately reducing total N application rate and increasing the ratio of topdressing to basal N fertilizer at the initial flowering stage.LI Pengcheng DONG Helin LIU Aizhong LIU Jingran SUN Miao LI Yabing LIU Shaodong ZHAO Xinhua MAO Shuchun 2017Pedosphere2017,27,4:7
32-Gy whole-body irradiation significantly alters the balance of CD4^(+)CD25^(-) T effector cells and CD4^(+)CD25^(+)Foxp3^(+) T regulatory cells in mice显示文摘CD4^(+)CD25^(+) T regulatory(Treg)cells are critical in inducing and maintaining immunological self-tolerance as well as transplant tolerance.The effect of low doses of whole-body irradiation(WBI)on CD41CD251Foxp31 Treg cells has not been determined.The proportion,phenotypes and function of CD4^(+)CD25^(+) Treg cells were investigated 0.5,5 and 15 days after euthymic,thymectomized or allogeneic bone marrow transplanted C57BL/6 mice received 2-Gy c-rays of WBI.The 2-Gy WBI significantly enhanced the ratios of CD41CD251 Treg cells and CD4^(+)CD25^(+)Foxp3^(+) Treg cells to CD41 T cells in peripheral blood,lymph nodes,spleens and thymi of mice.The CD41CD251 Treg cells of the WBI-treated mice showed immunosuppressive activities on the immune response of CD4^(+)CD25^(+) T effector cells to alloantigens or mitogens as efficiently as the control mice.Furthermore,2-Gy c-ray WBI significantly increased the percentage of CD4^(+)CD25^(+)Foxp3^(+) Treg cells in the periphery of either thymectomized mice or allogeneic bone marrow transplanted mice.The in vitro assay showed that ionizing irradiation induced less cell death in CD4^(+)CD25^(+)Foxp3^(+) Treg cells than in CD4^(+)CD25^(+) T cells.Thus,a low dose of WBI could significantly enhance the level of functional CD41CD251Foxp31 Treg cells in the periphery of naive or immunized mice.The enhanced proportion of CD41CD251Foxp31 Treg cells in the periphery by a low dose of WBI may make hosts more susceptible to immune tolerance induction.Yanyan Qu Baojun Zhang Shuchun Liu Aijun Zhang Tingting Wu Yong Zhao 2010Cellular & Molecular Immunology2010,7,6:7
4Variation analyses of growth and wood properties of Larix olgensis clones in China显示文摘The growth traits(tree height, diameter at breast height, and stem straightness degree) and wood properties[wood density(WD), fiber length, fiber width, ash content(AC), lignin content, cellulose content, hemicellulose content(HEC), and holocellulose content] of 208 26-yearold Larix olgensis clones were analyzed. Except for WD and AC, there were significant differences(p \ 0.01) for all traits among clones. The phenotypic coefficient of variation and repeatability of all traits were 9.34–35.33%and 0.218–0.930, respectively. Tree height and diameter at breast height showed significant positive correlation;however, the correlation coefficients among growth characteristics and wood properties were mostly not significant.Ten clones(L70, L56, L82, L90, L59, L91, L61, L92, L86,and L64) were selected as excellent clones under a selection rate of 5%, using tree height, diameter at breast height,and stem straightness degree as evaluation indexes, providing genetic gains of 28.69, 17.96, and 0.67%, respectively. Ten clones(L88, L305, L59, L66, L253, L304,L277, L298, L248, and L293) were selected as excellent clones using wood properties as an evaluation index, with a selection rate of 5%, providing genetic gains in WD, fiber length, fiber width, cellulose content, and HEC of 4.14,3.64, 9.28, 6.77, and 9.61%, respectively. This study provides a theoretical basis for selecting excellent L. olgensis clones.Shaopeng Yin Zhenhai Xiao Guohui Zhao Xin Zhao Xiaoyang Sun Ying Zhang Fuwei Wang Shuchun Li Xiyang Zhao Guan-Zheng Qu 2017Journal of Forestry Research2017,28,4:6
5Genetic variation and selection of introduced provenances of Siberian Pine(Pinus sibirica) in frigid regions of the Greater Xing'an Range,Northeast China显示文摘Siberian Pine(Pinus sibirica) is an ecologically and economically important species in pristine forests throughout northern Russia. Four provenances of P. sibirica were introduced from Mongolia and Russia to the Greater Xing'an Range(the Daxing'anling), northeast China in 1993. The aim of this research was to study genetic variation and selection of the introduced four Pinus sibirica provenances. Heights(H), basal diameters(BD), survival rates(SR) and crown lengths(CL) of different families were measured as primary outcomes in different growth years. Results of data analyses demonstrated high coefficients of phenotypic variation(PCV) and heritability(H2) for H, BD and CL at 18 years after introduction. PCV and H2 increased with age. Correlations of growth traits between any two growth years were all significantly positive, but the correlation coefficient was smaller when the growth year interval was larger. Correlations between H and the original environment factors decreased gradually, indicating that with long-term subsistence in the new environment, the influence of the source environment declined. Colligation of multiple traits to estimate provenances showed that Novosibirsk, Tomsk, and Altai Mountains had higher survival rates and biomass, and proved more suitable for introduction and plantation in the Greater Xing'an Range in China.Xiyang Zhao Cheng Wang Shuchun Li Wei Hou Shiqing Zhang Guijie Han Deng Pan Ping Wang Yufei Cheng Guifeng Liu 2014Journal of Forestry Research2014,25,3:6
6Crystallined Hybrid Carbon Synthesized by Catalytic Carbonization of Biomass and in-situ Growth of Carbon Nanofibers显示文摘Crystallined hybrid carbon was synthesized by the catalytic carbonization of biomass(Pinus kesiya sawdust)at1100℃and in-situ growth of carbon nanofibers(CNFs)at 750℃from acetylene.The microstructure of the composite was characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),transmission electron microscopy(TEM)and high-resolution transmission electron microscopy(HRTEM).It was found that highly crystallined carbon composed of well-aligned graphene layers with interlayer spacing of 0.34 nm can be formed by catalytic carbonization of biomass.However,the structure of the in-situ growing CNFs is lessaligned.Based on the results of the investigation,the formation mechanism of the crystallined hybrid carbon was discussed.Owning to synergistic effect of the highly crystallined carbon and the conductive network formed by CNFs,the crystallined hybrid carbon shows 32.6%lower electrical resistivity than biocarbon.When being used as anode material of lithium-ion batteries(LIBs),the crystallined hybrid carbon and the biocarbon have nearly the same first coulombic efficiencies(CEs),however,the former has a discharge capacity of 67%higher than the latter since the second cycle.Shuhe Liu Shuchun Zhao Yaochun Yao Peng Dong Chao Yang 2014Journal of Materials Science & Technology2014,30,5:4
76 - 20 Primary Design of a C-band Traveling-wave Cell显示文摘Wang Yanru Zhang Zimin Cao Shuchun Shen Xiaokang Zhao Quantang Jing Yi Zong Yang 2013IMP & HIRFL Annual Report2013,,1:2
8The influence of organic sources and environments on source rock deposition during the periods of Cretaceous–Eocene and Oligocene–Miocene,northern Kalimantan显示文摘The sedimentary system of Kalimantan has undergone significant development since the Oligocene.Previous research have largely ignored the capacity of the Cretaceous–Eocene sediments to produce hydrocarbons,focusing instead primarily on the Oligocene–Miocene coal as the principal source rocks.Shales and coals from the outcrops in the northern margin of Kalimantan were analyzed with palynological and geochemical methods to characterize the palaeoenvironmental and palaeoecological differences between the Cretaceous–Eocene and the Oligocene–Miocene samples.The high proportion of Cheirolepidoaceae,Schizaeoisporites and Ephedripites in the pollen assemblage from the Cretaceous–Eocene outcrops reflects an arid tropical/subtropical climate.The relatively low abundances of gymnosperm-derived biomarkers including isopimarane,β-phyllocladane,β-kaurane,suggest the gymnosperm features in flora.High C_(27)/C_(29)ααα20R sterane ratios,(C_(19)–C_(29))tricyclic terpanes/C_(30)αβhopane and extremely low oleanane/C_(30)αβhopane,bicadinane T/C_(30)αβhopane,and diterpenoid abundance indicate that there was a dominance of algae relative to higher plants in the organic matter.The gymnosperm-derived biomarkers,including isopimarane,β-phyllocladane,β-kaurane,suggest that palaeovegetation during this period was dominated by gymnosperms.The saline and reducing conditions in the bathyal and abysmal sea,evidenced by rather low Pr/Ph and high Gammarerane index,are beneficial for the preservation of hydrogen-rich organic matter.It is presumed that the Cretaceous–Eocene shales had great hydrocarbon generation potential in the southern South China Sea.During the period of Oligocene to Miocene in the Zengmu Basin and the Baram-Sabah Basin,the climate changed to a dominant humid and warm condition,which is corroborated by abundant pollen of Florschuetzia and Magnastriatites hawardi.Low C_(27)/C_(29)ααα20R sterane ratios,(C_(19)–C_(29))tricyclic terpanes/C_(30)αβhopane,and high oleanane/C_(30)αβhopane,bicadinane T/C_(30)αβhopane suggest that the palaeovegetation was dominated by angiosperms including the mangrove plants.The extremely abundant higher plants provide ample terrigenous organic matter for the formation of coal-measures in delta facies.The low gammacerane index and high Pr/Ph indicate the fresh and sub-oxic water in delta-neriticabysmal faces,which is not beneficial for the accumulation of hydrogen-rich organic matter.Thus,the Oligocene–Miocene marine argillaceous rocks can be potential sources of natural gas.Lei Lan Youchuan Li Zhigang Zhao Shuchun Yang Qing Lin Weilai Zhang 2023Acta Oceanologica Sinica2023,42,3:2
9Effect of Pore Structures on the Electrochemical Performance of Porous Silicon Synthesized from Magnesiothermic Reduction of Biosilica显示文摘Two kinds of porous silicon(PS) were synthesized by magnesiothermic reduction of rice husk silica(RHS) derived from the oxidization of rice husks(RHs). One was obtained from oxidization/reduction at 500 ℃ of the unleached RHs, the other was synthesized from oxidization/reduction at 650 ℃ of the acidleached RHs. The structural difference of the above PS was compared: the former had a high pore volume(PV, 0.31 cm3/g) and a large specific surface area(SSA, 45.2 m^2/g), 138 % and 17 % higher than the latter, respectively. As anode materials for lithium ion batteries, the former had reversible capacity of 1 400.7 m Ah/g, 987 m Ah/g lower than the latter; however, after 50 cycles, the former had 64.5 % capacity retention(907 m Ah/g), which was 41.2 % higher than the latter(555.7 m Ah/g). These results showed that the electrochemical performance of PS was significantly affected by its pore structures, and low reduction temperature played the key role in increasing its porosity, and therefore improving its cycling performance.刘树和 LIU Bin YAO Yaochun DONG Peng ZHAO Shuchun 2016Journal of Wuhan University of Technology(Materials Science)2016,31,5:1
10Novel carbon carbon bond formation from propargylic alcohols and olefin toward iCive membered heterocyclic rings catalyzed by AgSbF6 显示文摘Ji Kegong Shu Xingzhong Zhao Shuchun 2009Org Lett2009,11,15:1
116 - 30 Electric Field Measurement Results and Analysis of PLIA显示文摘Shen Xiaokang Zhang Zimin Cao Shuchun Zhao Hongwei Wang Bo Shen Xiaoli Zhao Quantang Liu Ming Jing Yi 2012IMP & HIRFL Annual Report2012,,1:1
12Comparison of genetic impact on growth and wood traits between seedlings and clones from the same plus trees of Pinus koraiensis显示文摘To evaluate the relationships among clones and open pollinated families from the same plus trees and to select elite breeding materials,growth,and wood characteristics of 33-year-old Pinus korainsis clones and families were measured and analyzed.The results show that growth and wood characters varied significantly.The variation due to clonal effects was higher than that of family effects.The ratio of genetic to phenotypic coefficient of variation of clones in growth and wood traits was above 90%,and the repeatability of these characteristics was more than 0.8,whereas the ratio of genetic to phenotypic coefficient of variation of families was above 90%.The broad-sense heritability of all characteristics exceeded 0.4,and the narrow-sense family heritability of growth traits was less than 0.3.Growth characteristics were positively correlated with each other,but most wood properties were weakly correlated in both clones and families.Fiber length and width were positively correlated between clones and families.Using the membership function method,eleven clones and four families were selected as superior material for improved diameter growth and wood production,and two families from clonal and open-pollinated trees showed consistently better performance.Generally,selection of the best clones is an effective alternative to deployment of families as the repeatability estimates from clonal trees were higher than narrow-sense heritability estimates from open pollinated families.The results provide valuable insight for improving P.koraiensis breeding programs and subsequent genetic improvement.Xiaoting Liu Zhimin Lu Jingui Wu Yuchun Yang Shuchun Li Lin Wu Qingshan Xu Qi Yu Li Zhao Jian Sun Wei Zheng Mulualem Tigabu Xiyang Zhao 2023Journal of Forestry Research2023,34,2:0
13A numerical study of mixing intensification for highly viscous fluids in multistage rotor-stator mixers显示文摘How to achieve uniform mixing of highly viscous fluids with low energy consumption is a major industry demand and one of the hot spots of mixing research.A typical multistage rotor-stator mixer(MRSM)equipped with a distributor was investigated to disclose the effects on the mixing performance and power consumption for highly viscous fluids via numerical simulation,considering the influence factors associated with different geometric parameters of both MRSM and the distributor.The mixing index and power consumption are used to evaluate the performance of the mixers.The dimensionless correlations for the mixing index and the power consumption are established considering the factors including the flow rate,rotor speed,the number of mixing units.Adopting the optimized mixer with the distributor(X1-T1),the mixing index increases to 0.85(obviously higher than 0.46 for the mixer T1 without a distributor),meanwhile the corresponding power consumption is about 1/5 of that of T1 achieving the same mixing effect.It illustrates that the distributor can significantly improve the mixing of highly viscous fluids in the MRSM without the cost of large power consumption.These results would provide a guidance on the design and optimization of multistage rotor-stator mixers in industrial applications.Liying Chen Junheng Guo Wenpeng Li Shuchun Zhao Wei Li Jinli Zhang 2022Chinese Journal of Chemical Engineering2022,35,7:0
146-45 Brief Introduction of IMP Electron Linear Accelerator Development and Its Applications显示文摘An electron linear accelerator (e-LINAC) is under designing and constructing in IMP for various imaging diagnostics application. The primary layout design is shown in Fig. 1. The e-LINAC is based on two kinds of electron guns, thermionic radio frequency (RF) gun for high average current and photocathode RF gun for ultra-short bunch length, which are able to provide various beam parameters and can satisfy requirement of the beam parameters from many applications.Zhang Zimin Zhao Quantang Cao Shuchun Shen Xiaokan Zong Yang Zhu Yunliang Zhou Youwei Gai Wei 2015IMP & HIRFL Annual Report2015,,1:0
156-46 Research Progress of a 100 MeV Electron Linac for High Energy Electron Radiography显示文摘High Energy Electron Radiography (HEER) is a new method suitable for High Energy Density Physics (HEDP) research that uses a high energy electron beam as a probe for time resolved imaging measurements of high energy density processes in materials[1]. A high energy electron imaging research platform based on a 100 MeV Electron Linac (e-Linac) which was designed for experimental research of HEER has been proposed by Electron Accelerator Group in IMP. This e-Linac has two injection beam lines. One is a thermionic RF gun with Alpha magnet and quadrupole magnets, and the other is a photo-cathode RF gun with emittance compensation solenoid(Fig. 1), and parameters details is shown in Table 1. The experimental terminals of this e-linac have been designed for HEER and the Thick Target X-ray imaging.Cao Shuchun Zhang Zimin Shen Xiaokang Liu Ming Zong Yang Zhu Yunliang Zhou Youwei Wang Yanru Zhang Xiaoming Li Zhongping Zhao Quantang Xiao Rongqing Jing Yi Gai Wei 2015IMP & HIRFL Annual Report2015,,1:0
166-47 Primary Research of ILC Positron Source Target Cooling显示文摘In recent years, the idea for undulator based Positron source had become a current design for international linear Collider (ILC). This design is that the beam from the electron main linac passes through a long helical undulator to generate a highly polarized and multi-Mev photon beam which hits a thin metal rotating target to generate showers of Positron[1]. During this procedure, the multi-Kev energy Positron will heat target and then damage the rotating target system[2].Zhang Xiaoming Zhang Zimin Cao Shuchun Shen Xiaokang Zhao Quantang Zong Yang Wang Yanru 2015IMP & HIRFL Annual Report2015,,1:0
176-49 Primary Design and Simulation of LEBT for High Energy Electron Radiography显示文摘At the beginning of 2013, the Institute of Modern Physics proposed to develop electron radiography technique based on high-energy and short-pulsed electron accelerator, which is applied to high energy density state/thick target diagnostics[1]. A low energy beam transport system (LEBT) was designed to matching the transmission between the gun and the LINAC.Zhu Yunliang Zhang Zimin Cao Shuchun Liu Ming Shen Xiaokang Zong Yang Zhang Xiaoming Wang Yanru Zhou Youwei Li Zhongping Zhao Quantang Xiao Rongqing Jing Yi 2015IMP & HIRFL Annual Report2015,,1:0
18Fluorine Substitution Tunes the Nanofiber Chirality of Supramolecular Hydrogels to Promote Cell Adhesion and Proliferation显示文摘Fluorine atoms confer desirable biophysical,chemical,and biological properties to peptides/proteins by participating in various intermolecular interactions with their environment,but they are rarely used to control supramolecular chirality and functional.Herein,to identify the effects of fluorine substitution on the chirality and function of supramolecular assem-blies,C2-symmetric benzene-paradicarboxamide-based phenylalanine(phe)derivatives and three monofluorinated variants that had a single fluorine atom on their benzyl side chain in either the ortho,meta,or para position were synthesized.The experimental and theoretical results clearly show that the resulting assembled fibrils were supported by multiple interactions,including hydrogen bonding,π–πstacking and C/O–H…F–CAr interactions.Compared to nonfluorinated analogs,fluorine and its ring position on the aromatic side chain dictated the type and strength of the F···H interaction and then induced changes in supramolecular chirality and fiber morphology.Further studies on cell behavior showed that the order of positive interac-tion between high-order supramolecular chirality(M,P)and molecular chirality(L,D)on cell proliferation and viability is LM>DM>LP>DP.These findings provide a protocol for leveraging fluorine atoms and their positional dependence on directing chiral nanostructures with desirable handedness and creating fluorinated supramolecular hydrogels as extracellular matrix-mimetic scaffolds for cell culture and regenerative medicine.Huijie Lu Yu Zhao Shuchun Qin Yanyan Zhang Jinying Liu Jian Zhang Chuanliang Feng Weili Zhao 2023Advanced Fiber Materials2023,5,1:0
194-23 An Initiative Design of High Energy Electron Radiography with Ultrahigh Spatial and Temporal Resolution显示文摘In general, high energy density matter can only be transiently produced in the laboratory on a time scale ofnanoseconds. In addition, the pressure in a high energy density sample exceeds 1 Mbar, thus the hydro-dynamicresponse of the sample is a high expansion velocity in the range of km/s (or m/ns). Therefore diagnostics whichare capable of high time resolution (< ns) and high space resolution (< 10 m) are needed. Here, we present ascheme that uses a high energy electron beam as a probe for dynamic imaging measurements of high energy densityprocesses in materials with spatial, temporal resolution and frame rate in the order of 1 m, 1 ps and 1010 FPS,respectively.The device uses an e-LINAC (electron Linear Accelerator), which can produce electron beams with bunchintensity ranging from a few pC to 100 nC, bunch length and bunch interval of 1 and 100 ps in minimum, respectively.The beam energy can be increased easily from a few MeV to GeV by adding more accelerating sections. Detailscan be found in Ref. [1].Zhao Yongtao Zhang Zimin Gai Wei Du Yingchao Cheng Rui Cao Shuchun Zhao Quantang Zhou Xianming Tang Chuanxiang Zhan Wenlong 2014IMP & HIRFL Annual Report2014,,1:0
204-29 Step-target Design for High Energy Electron Radiography Research显示文摘High energy proton beam has the long penetration length in solid matter and it could produce the radiographsand indicate the tomography and material properties inside of the specimen. Considering the expensive coststo construct a high energy proton accelerator, the other candidate of high energy electron beam becomes moreacceptable[1??3]. Due to the high spatial and temperal resolution of high energy electron beam. It is a power tool todiagnose the inner structure change during the high energy density matter production and the inertial confinementfusion process. In order to study the density resolution of the high energy electron beam radiography, a step-targetwas designed and produced. The structure and the target pictures are shown in Fig. 1 and the Si targets withdifferent slot-width were produced by using the microetch technics.Cheng Rui Zhao Yongtao Zhang Ziming Gai Wei Du Yingchao Cao Shuchun Zhou Xianming Zhao Quantang Shen Xiaokang Zong Yang Wang Yangru Xiao Jiahao Li Haixia 2014IMP & HIRFL Annual Report2014,,1:0
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