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Photometric Monitoring of ROSAT-Selected Weak line T Tauri Stars

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Chinese Journal of Astronomy and Astrophysics 2006年第6期6卷 716-722页

作者： li-feng xing Xiao-Bin Zhang Jian-Yan Wei National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Department of Technology and Physics Zhengzhou University of Light Industry Zhengzhou 450002

We monitored the light curves of 22 weak-line T Tauri stars （WTTSs） discovered among the X-ray sources in the field of the Taurus-Auriga cloud. For 12 of the 22 WTTSs photometric periodic variability is confirmed and their rational periods are determined using Phase Dispersion Minimization （PDM） and Fourier analysis. Most of them are found to have periods shorter than one day. This gives further evidence for the spin up of solar-type stars predicted by the models of angular momentum evolution of pre-main sequence stars.

关键词： stars late-type- stars pre-main sequence- stars rotation

Genetic dissection of the sensory and textural properties of Chinese white noodles using a specific RIL population

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Journal of Integrative Agriculture 2017年第2期16卷 454-463页

作者： li Wen-jing DENG Zhi-ying CHEN Guang-feng CHEN Fang li xing-feng TIAN Ji-chun State Key Laboratory of Crop Biology Ministry of Science and Technology/Key Laboratory of Crop Biology of Shandong Province/Agronomy CollegeShandong Agricultural University College of Ecology and Garden Architecture Dezhou University

To dissect the genetic control of the sensory and textural quality traits of Chinese white noodles, a population of recom- binant inbred lines （RILs）, derived from the cross of waxy wheat Nuomai 1 （NM1） and Gaocheng 8901 （Gc8901）, was used. The RILs were tested in three different environments to determine the role of environmental effects on quantitative trait loci （QTL） analysis. A total of 45 QTLs with additive effects for 17 noodle sensory and textural properties under three environments were mapped on 15 chromosomes. These QTLs showed 4.23-42.68% of the phenotypic variance explained （PVE）. Nineteen major QTLs were distributed on chromosomes 1 B, 1 D, 2A, 3B, 3D, 4A, and 6A, explaining more than 10% of the phenotypic variance （PV）. Clusters were detected on chromosomes 2B （3 QTLs）, 3B （11 QTLs） and 4A （5 QTLs）. The cluster detected on chromosome 4A was close to the Wx-B1 marker. Five co-located QTLs with additive effects were identified on chromosomes 2B, 3D, 4A, 6A, and 7B. The two major QTLs, ***-3B. 1 and ***-3B. 1, in cluster wPt666008-wPt5870 on chromosome 3B were detected in three different environments, which perhaps can be directly applied to improve the textural properties of noodles. These findings could offer evidence for the selection or development of new wheat varieties with noodle quality using molecular marker-assisted selection （MAS）.

关键词： wheat (Triticum aestivum L.) noodle sensory quality textural property QTL

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改性双基推进剂压伸成型工艺安全的数值模拟

火炸药学报 2024年第9期47卷 822-829,I0003页

作者：仇友圣叶宝云张致源王润馨邓文文李鑫丰安崇伟王晶禹中北大学环境与安全工程学院山西太原030051 山西省超细粉体工程技术研究中心山西太原030051

为了深入研究压伸工艺参数对改性双基推进剂成型过程安全性能的影响,对压缩熔融段、熔体输送段和口模成型段进行整体建模,对改性双基推进剂物料的密度、流变特性等物料参数进行了测定;基于Polyflow软件,对流体域网格无关性进行了验证,... 详细信息

为了深入研究压伸工艺参数对改性双基推进剂成型过程安全性能的影响,对压缩熔融段、熔体输送段和口模成型段进行整体建模,对改性双基推进剂物料的密度、流变特性等物料参数进行了测定;基于Polyflow软件,对流体域网格无关性进行了验证,研究了改性双基推进剂物料在非等温条件下压伸过程的安全特性。结果表明,螺杆转速的增加会使物料温度、压力、剪切速率升高,存在燃爆风险,为保证安全性,压伸成型过程中适宜的螺杆转速为10 r/min;螺杆温度增加,剪切速率降低,物料的塑化程度会变差,温度升高易使物料分解,结合改性双基推进剂敏感物料成分特性考虑,螺杆温度为85℃时相对安全;相较于螺杆温度,套筒温度的变化对物料流场的影响较小,结合改性双基推进剂实际生产条件考虑,70℃套筒保温温度适合改性双基推进剂生产。结合模拟结果,得出在推进剂生产过程中需注意压力和温度快速变化带来的影响。

关键词：安全科学改性双基推进剂螺压工艺工艺安全压伸成型工艺数值模拟

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Rotation Periods of Nine ROSAT Selected Solar-Type Stars

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Chinese Journal of Astronomy and Astrophysics 2007年第4期7卷 551-557页

作者： li-feng xing Shuang-Yi Zhao Wei Su Yan Shen Xiao-Bin Zhang Jian-Yan Wei Department of Technology and Physics Zhengzhou Unversity of Light Industry Zhengzhou 450002 National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Department of Physics Xingtai University Xingtai 054001

We monitored 16 X-ray selected young solar-type stars for light variation and found appreciable periodic light variability with amplitudes of a few hundredths of a magni- tude in nine of the objects. Using the method of Phase Dispersion Minimization （PDM） and Fourier analysis （software PERIOD04）, the rotation periods of these stars were determined from the photometric data. The rotation periods of all nine stars are shorter than about 3 days. It is suggested that, as with the Pleiades cluster, small amplitude light variations are quite common among young solar-type stars with rotation periods around 3 days or less. This gives further evidence for the spin up of solar-type stars predicted by models of angular momentum evolution of pre-main sequence stars.

关键词： stars: late-type - stars: pre-main sequence - stars: rotation

Advancement in research of anti-cancer effects of toad venom(ChanSu) and perspectives

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World Journal of Traditional Chinese Medicine 2015年第2期1卷 12-23页

作者： Miao liu li-xing feng li-Hong Hu Xuan liu De-An Guo Shanghai Research Center for Modernization of TCM Shanghai Institute of Materia Medica Chinese Academy of Sciences

Toad venom, called as Chan Su in China, is a widely used traditional Chinese medicine(TCM) whose active components are mainly bufadienolides. Chan Su could exhibit cardiotonic, anti-microbial, anti-inflammatory and, most importantly, anti-cancer effects. In the present review, reports about the in vitro, in vivo and clinical anti-cancer effects of Chan Su or its representative component, bufalin, were ***, reported anti-cancer mechanisms of cardenolides, structure analogues of bufadienolides, were also introduced. Based on the results got from research of Chan Su/bufalin and the results from cardenolides, possible signal network related to the anti-cancer effects of Chan Su/bufalin was predicted. Furthermore, future potential use of Chan Su in anti-cancer therapy was discussed.

关键词： Chan Su Anti-cancer Bufadienolides Bufalin Cardenolides

Challenges in li-ion battery high-voltage technology and recent advances in high-voltage electrolytes

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Journal of Energy Chemistry 2024年第4期91卷 73-98页

作者： Jianguo liu Baohui li Jinghang Cao Xiao xing Gan Cui Shandong Key Laboratory of Oil&Gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of Petroleum(East China)Qingdao 266580ShandongChina

The electrolyte directly contacts the essential parts of a lithium-ion battery,and as a result,the electrochemical properties of the electrolyte have a significant impact on the voltage platform,charge discharge capacity,energy density,service life,and rate discharge *** raising the voltage at the charge/discharge plateau,the energy density of the battery is ***,this causes transition metal dissolution,irreversible phase changes of the cathode active material,and parasitic electrolyte oxidation *** article presents an overview of these concerns to provide a clear explanation of the issues involved in the development of electrolytes for high-voltage lithium-ion ***,solidstate electrolytes enable various applications and will likely have an impact on the development of batteries with high energy *** is necessary to improve the high-voltage performance of electrolytes by creating solvents with high thermal stabilities and high voltage resistance and additives with superior film forming performance,multifunctional capabilities,and stable lithium *** offer suggestions for the future development of high-energy lithium-ion batteries,we conclude by offering our own opinions and insights on the current development of lithium-ion batteries.

关键词： lithium-ion battery High voltage Electrolyte additive Solid electrolyte

The Complete Classification of Graphs whose Second Largest Eigenvalue of the Eccentricity Matrix is Less Than 1

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Acta Mathematica Sinica,English Series 2024年第7期40卷 1741-1766页

作者： Jian feng WANG xing Yu LEI Shu Chao li Zoran STANIC School of Mathematics and Statistics Shandong University of TechnologyZibo255049P.R.China Faculty of Mathematics and Statistics Central China Normal UniversityWuhan430079P.R.China Faculty of Mathematics University of BelgradeStudentski trg 1611000BelgradeSerbia

The eccentricity matrix of a graph is obtained from the distance matrix by keeping the entries that are largest in their row or column,and replacing the remaining entries by *** matrix can be interpreted as an opposite to the adjacency matrix,which is on the contrary obtained from the distance matrix by keeping only the entries equal to *** the paper,we determine graphs having the second largest eigenvalue of eccentricity matrix less than 1.

关键词： Eccentricity matrix eigenvalue diameter principal submatrix forbidden subgraph

Heterosis and Combining Ability for Major Yield Traits of a New Wheat Germplasm Shannong 0095 Derived from Thinopyrum intermedium

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Agricultural Sciences in China 2009年第6期8卷 753-760页

作者： BAO Yin-guang WANG Sen WANG Xiu-qin WANG Yu-hai li xing-feng WANG lin WANG Hong-gang Agronomy College Shandong Agricultural University/Tai＇an Subcentre of National Wheat Improvement Centre Tai＇an 271018 P.R. China State Key Laboratory of Crop Biology Shandong Agricultural University Tai＇an 271018 P.R.China Agronomy College Nanjing Agricultural University Nanjing 210095 P.R. China Jining Institute of Agricultural Sciences Jining 272031 P.R.China Zaozhuang University Zaozhuang 277100 P.R.China

The wheatgrass, Thinopyrum intermedium （Host） Barkworth ＆ DR Dewey, shows many beneficial characteristics, such as big spikes and high resistance to many diseases. To transfer the beneficial genes of this species, many wheat- Thinopyrum intermedium alien chromosome lines were developed. Of them, Shannong 0095 （SN0095）, a disomic substitution, has long spikes and flag-leaves, and thus may be an important genetic resource for wheat yield improvement. In order to realize its heterosis and combining ability on major yield traits, a 7 ×7 complete diallel design was made according to Griffing＇s Method-1. The results showed that heterosis for spike length （SPL）, flag-leaf area （FLA）, number of spikes per plant （NSP）, number of spikelets per spike （NSL）, kernels per spike （KPS）, 1 000-kernel weight （TKW） and grain yield per plant （GYP） existed in all the crosses by SN0095, but heterobeltiosis occurred only for KPS, TKW, and GYP. The relative mid-parent heterosis （RMH） and relative high-parent heterosis （RHH） for GYP, which valued as high as 35.32 and 29.92% respectively, were the highest among all the traits mearsured. Though additive and non-additive gene effects and cytoplasmic effects （or cytoplasmic-nuclear interaction effects） were found in governing all the traits measured above, additive gene action played a predominant role. The results also showed that SN0095 was the best-general combiner for SPL and FLA, and high-general combiner for NSP amongst all the parents. Estimates of specific combining ability （SCA） showed that SN0095 could also make high-SCA combinations for GYP, such as SN0095 × Jimai 19 （JMI9）. SN0095 could be a unique and important parent in hybrid wheat breeding programs.

关键词： Triticum aestivum Thinopyrum intermedium diallel cross combining ability heterosis

Nitrogen-doped titanium dioxide/schwertmannite nanocomposites as heterogeneous photo-Fenton catalysts with enhanced efficiency for the degradation of bisphenol A

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Journal of Environmental Sciences 2024年第9期143卷 1-11页

作者： xing-xing Qiao Yu-Hang Xu Xiang-Ji liu Sai-Le Chen Zhou Zhong Ya-feng li Jian Lü Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350116China

Potential health risks related to environmental endocrine disruptors(EEDs)have aroused research hotspots at the forefront of water treatment ***,nitrogen-doped titanium dioxide/schwertmannite nanocomposites(N-TiO_(2)/SCH)have been successfully developed as heterogeneous catalysts for the degradation of typical EEDs via photo-Fenton *** to the sustainable Fe(Ⅲ)/Fe(Ⅱ)conversion induced by photoelectrons,as-prepared N-TiO_(2)/SCH nanocomposites exhibit much enhanced efficiency for the degradation of bisphenol A(BPA;ca.100% within 60 min under visible irradiation)in a wide pH range of 3.0-7.8,which is significantly higher than that of the pristine schwertmannite(ca.74.5%)or N-TiO_(2)(ca.10.8%).In this photo-Fenton system,the efficient degradation of BPA is mainly attributed to the oxidation by hydroxyl radical(·OH)and singlet oxygen(^(1)O_(2)).Moreover,the possible catalytic mechanisms and reaction pathway of BPA degradation are systematically investigated based on analytical and photoelectrochemical *** work not only provides a feasible means for the development of novel heterogeneous photo-Fenton catalysts,but also lays a theoretical foundation for the potential application of mineral-based materials in wastewater treatment.

关键词： Titanium dioxide Schwertmannite Fenton reaction Environmental endocrine disruptors Photocatalysis