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狼尾草对铬的积累及其抗氧化特性研究

河南农业大学学报 2017年第3期51卷 330-334页

作者：朱秀红侯国栋茹广欣张龙冲吴晓娜刘国强河南农业大学河南郑州450002

以狼尾草为材料,采用盆栽试验,在不同质量分数Cr^(6+)胁迫强度下(0,300,600,900,1 200,1 500 mg·kg^(-1)),以POD,SOD,CAT活性作为观测指标,对狼尾草富集Cr^(6+)的富集系数和转运系数进行测定,从而研究Cr^(6+)胁迫下狼尾草部分生理生化... 详细信息

以狼尾草为材料,采用盆栽试验,在不同质量分数Cr^(6+)胁迫强度下(0,300,600,900,1 200,1 500 mg·kg^(-1)),以POD,SOD,CAT活性作为观测指标,对狼尾草富集Cr^(6+)的富集系数和转运系数进行测定,从而研究Cr^(6+)胁迫下狼尾草部分生理生化指标的变化趋势和机制。结果表明,随着Cr^(6+)胁迫质量分数的增加,狼尾草POD活性呈上升趋势,SOD和CAT活性呈先升后降的变化趋势,且在Cr^(6+)质量分数为300 mg·kg^(-1)时达到最高。在不同质量分数Cr^(6+)的胁迫下,狼尾草对Cr^(6+)的富集系数均>0.8,转运系数均>0.6,体现了狼尾草对Cr^(6+)有着良好的富集和转运能力。在过高质量分数水平的影响下,酶活性普遍受到抑制,狼尾草生长会出现明显受胁迫症状,甚至死亡。

关键词：狼尾草 Cr^6+胁迫酶活性转运系数富集系数

基于便携式漫反射叶绿素仪测定葡萄叶绿素含量方法的探究

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河南科学 2015年第11期33卷 1927-1929页

作者：魏凯朱秀红胡小宁杨张青侯国栋河南农业大学林学院郑州450002 河南农业大学农业测试与仪器技术研究中心郑州450002

以葡萄叶为材料,使用新研发的便携式漫反射叶绿素仪快速测定叶片中的叶绿素迅捷指数(XJI).将所得的结果与传统的丙酮-乙醇混合法测得的叶片中的叶绿素含量进行对比,结果表明XJI与传统方法测定的叶绿素含量有极好的线性关系:y=0.017 6x+9... 详细信息

以葡萄叶为材料,使用新研发的便携式漫反射叶绿素仪快速测定叶片中的叶绿素迅捷指数(XJI).将所得的结果与传统的丙酮-乙醇混合法测得的叶片中的叶绿素含量进行对比,结果表明XJI与传统方法测定的叶绿素含量有极好的线性关系:y=0.017 6x+9.558 9(R2=0.903 0),而且叶绿素含量与叶片全氮含量也呈现显著正相关的关系:y=2.720 4x+249.69(R2=0.903 4).因此,便携式漫反射叶绿素仪能够正确快速测定植株的叶绿素含量,反映植株的全氮营养水平,对简化植物叶片叶绿素的测定方法,提高工作效率具有重要的科学意义.

关键词：叶绿素 XJI指数漫反射叶绿素仪全氮

Coalbed methane enrichment model of low-rank coals in multi-coals superimposed regions: a case study in the middle section of southern Junggar Basin

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Frontiers of Earth Science 2021年第2期15卷 256-271页

作者： Haihai hou guodong LIANG Longyi SHAO Yue TANG Guangyuan MU College of Mining Liaoning Technical UniversityFuxin 123000China College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing 100083China Oil&Gas Resource Survey Center China Geological SurveyMinistry of Land and ResourceBeijing 100029China

The Middle Jurassic Xishanyao Formation in the central section of the southern Junggar Basin has substantial amounts of low-ranked coalbed methane(CBM)recourses and is typically characterized by multi superimposed coal *** establish the CBM enrichment model,a series of experimental and testing methods were adopted,including coal maceral observation,proximate analysis,low temperature nitrogen adsorption(LTNA),methane carbon isotope determination,porosity/permeability simulation caused by overburden,and gas content *** controlling effect of sedimentary environment,geological tectonic,and hydrogeological condition on gas content was analyzed in *** results demonstrate that the areas with higher gas content(an average of 8.57 m3/t)are mainly located in the Urumqi River-Santun River(eastern study area),whereas gas content(an average of 3.92 m3/t)in the Manasi River-Taxi River(western study area)is relatively *** of the combined effects of strata temperature and pressure,the gas content in coal seam first increases and then decreases with increasing buried depth,and the critical depth of the inflection point ranges from 600 m to 850 *** by the changes in topography and water head height,the direction of groundwater migration is predicted from south to north and from west to *** on the gas content variation,the lower and middle parts of the Xishanyao Formation can be divided into three independent coalbearing gas *** a single gas-bearing system,there is a positive correlation between gas content and strata pressure,and the key mudstone layers separating each gas-bearing system are usually developed at the end of each highstand system *** new CBM accumulation model of the multi-coals mixed genetic gas shows that both biological and thermal origins are found in a buried depth interval between 600 m and 850 m,suggesting that the coals with those depths are the CBM enrichment horizons and favorable exploration regions

关键词： Xishanyao Formation multi-coal seams superimposed region low rank coal main controlling factors enrichment model

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霍林河露天煤矿火煤防治

露天采矿技术 2016年第12期31卷 83-85页

作者：董俊厅李伟王莫舒杨鹏飞侯国栋内蒙古霍林河露天煤业股份有限公司南露天煤矿内蒙古霍林郭勒市029200

结合霍林河某露天煤矿火煤治理经验措施,对该矿多年总结的几种火煤治理方法进行了分析对比,确定了实施效果最好的方法,并阐述了该矿火煤自燃预防措施,确定了该矿煤炭自燃防治技术处于国内先进水平。

关键词：露天煤矿煤炭自燃火煤治理

Repeated Wildfires in the Middle Jurassic Xishanyao Formation(Aalenian and Bajocian Ages) in Northwestern China

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Acta Geologica Sinica(English Edition) 2022年第5期96卷 1752-1763页

作者： hou Haihai SHAO Longyi LIANG guodong TANG Yue ZHANG Huajie ZHANG Jiaqiang College of Mining Liaoning Technical UniversityFuxinLiaoning 123000China College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing 100083China Oil&Gas Resource Survey Center China Geological SurveyMinistry of Land and ResourceBeijing 100029China

The coal-bearing strata in the southern Junggar Basin in northwestern China have recently attracted the attention of coal geologists. Its abundance of coal resources is of great interest as there is a potential of unlocking details about the palaeoclimatic information. Coal deposits have the capacity to record wildfire events, even those with inefficient combustions. To characterize wildfire events and palaeoclimatic history of the Middle Jurassic Xishanyao Formation(Aalenian and Bajocian ages), 22 coal samples from borehole cores and coal mines in the southern Junggar Basin were collected and their macerals were analyzed. The results indicated that fusinite and semi-fusinite were the dominant components of inertinite with proportions of 35.27% and 54.67%, respectively. The presence of inertinite is an indicator that wildfires occurred at the time of peat land development, and the widespread occurrence suggests large scale wildfires during the Middle Jurassic. This study proposes a new parameter for the evaluation of wildfire features by combining burning frequency and burning temperature. The comprehensive evaluation index(CEI) was influenced by the lacustrine basin level and ancient plant types from a sequence framework. During the Middle Jurassic, most wildfires were surface fires with low level and ground fire with high level. High oxygen levels were estimated in the lower, middle, and upper members of the Xishanyao Formation with corresponding to 26.78%, 24.55%, and 23.55%, respectively. The high oxygen levels would be the primary cause of repeated wildfires in the Middle Jurassic. These results are helpful for understanding palaeoclimatic changes in the Middle Jurassic.

关键词： wildfire charcoal Middle Jurassic comprehensive evaluation index northwestern China

Microstructure, Mechanical Properties and Corrosion Resistance of the Mo_(0.5)V_(0.5)NbTiZr_(x) High-Entropy Alloys with Low Thermal Neutron Sections

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Acta Metallurgica Sinica(English Letters) 2024年第10期37卷 1643-1656页

作者： Chao Xiang En-hou Han Zhiming Zhang Huameng Fu Haifeng Zhang Jianqiu Wang guodong Hu Institute of Corrosion Science and Technology Guangzhou510530China CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of Sciences(CAS)Shenyang110016China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

High-entropy alloys exhibit significant potential for application in the nuclear industry owing to their exceptional resistance to irradiation,excellent mechanical properties,and corrosion *** this work,the Mo_(0.5)V_(0.5)NbTiZr_(x)(x=0-2.0)high-entropy alloys containing alloying elements with low thermal neutron absorption cross section were designed and *** crystal structure,microstructure,mechanical properties and corrosion resistance of the studied alloys were *** the alloys possess a body-centered cubic crystal structure,which is consistent with the CALPHAD(acronym of CALculation of PHAse Diagram)modeling *** addition of Zr does not alter the crystal structure of the Mo_(0.5)V_(0.5)NbTiZr_(x) alloys;however,it leads to an increase in the lattice constant as Zr content *** addition of Zr initially enhances the yield strength,but subsequently leads to a decline as the Zr content increases ***,the corrosion resistance of the Mo_(0.5)V_(0.5)NbTiZr_(x) alloys in superheated steam at 400℃ and 10.3 MPa decreases with the increase of Zr *** effect of Zr content on the phase formation,mechanical properties and corrosion resistance of the Mo_(0.5)V_(0.5)NbTiZr_(x) high-entropy alloys are *** study has successfully developed a novel Mo_(0.5)V_(0.5)NbTiZr_(0.25) high-entropy alloy,which demonstrates exceptional properties including high yield strength,excellent ductility,and superior anti-corrosion *** findings of this research have significant implications for the design of high-entropy alloys in nuclear applications.

关键词： High-entropy alloys Phase formation Mechanical properties Corrosion resistance

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高速钢M42喷射成形余粉组织性能分析

河北冶金 2024年第7期 51-54页

作者：辛栋梅侯国栋杜文华张海军默雄河冶科技股份有限公司河北石家庄052165

喷射成形工艺不可避免会产生喷射余粉,对喷射成形高速钢M42喷射余粉进行了成分、气体含量、形貌以及组织性能研究。结果表明,M42喷射余粉氧含量为267×10^(-6)、氮含量为374×10^(-6),大部分粉末呈球形,尺寸为140μm;喷射余粉为树枝晶组... 详细信息

喷射成形工艺不可避免会产生喷射余粉,对喷射成形高速钢M42喷射余粉进行了成分、气体含量、形貌以及组织性能研究。结果表明,M42喷射余粉氧含量为267×10^(-6)、氮含量为374×10^(-6),大部分粉末呈球形,尺寸为140μm;喷射余粉为树枝晶组织,内部组织为基体+网状碳化物,碳化物类型大部分为M2C类型碳化物,尺寸为0.4~0.6μm,存在少量的M6C类型碳化物,尺寸为2μm。M42喷射余粉粒度呈正态分布,具有较好的流动性且松装密度、振实密度较高,分别达到了理论密度的62%和68%,粉末在后续热等静压包套制备过程中具备良好填充性和均匀性。

关键词：高速钢 M42 喷射成形喷射余粉组织粒度分布

Coal Seam Correlation in Terrestrial Basins by Sequence Stratigraphy and Its Implications for Paleoclimate and Paleoenvironment Evolution

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Journal of Earth Science 2023年第2期34卷 556-570页

作者： Haihai hou Longyi Shao Yue Tang Yanan Li guodong Liang Yilin Xin Jiaqiang Zhang College of Mining Liaoning Technical UniversityFuxin 123000China College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing 100083China Oil&Gas Resource Survey Centre China Geological SurveyMinistry of Land and ResourcesBeijing100029China

Coal correlation cannot only guide coal and coalbed methane exploitation,but may also provide valuable information for the evolution of the paleoclimate and paleoenvironment during coalaccumulation *** is difficult to undertake coal correlation in a terrestrial basin due to multiple superimposed coal seams and a lack of effective marker *** this study,based on the analyses of coal-bearing sedimentary environments and the observations of field outcrops and drilling cores,three key sequence surfaces of the Middle Jurassic Xishanyao Formation were identified in the middle part of the southern Junggar *** third-order sequences(S.Ⅲ1,S.Ⅲ2 and S.Ⅲ3)and ten fourth-order sequences were divided within the Xishanyao *** coal correlation was finally identified,combined with the layered vertical pattern coal and its interval thickness,coal maceral,and coal quality *** terms of the coal correlation within a specific sequence set,the interval of the B2–B3 coals was approximately three times thicker than that of the B3–B5 coals,which was the main marker for regional coal correlation in the Lower Xishanyao ***,the phenomena of steadily developed B4 coal seam(2–3 m in thickness)across the Liuhuanggou coal mining area(eastern study region)and the large-small-large variation for intervals between the B8 and B9,B9 and B10,and B10 and B11 coal seams in the Manasi coal mining(western study region)were also an effective means for local coal *** vitrinite and sulphur content and decreasing inertinite content in a third-order sequence were found,which were likely to be closely related to lake level *** on the variation of coal macerals,the wildfire frequency gradually decreased from the bottom to the top of the Xishanyao *** predicted O2level of the S.Ⅲ1,S.Ⅲ2,and S.Ⅲ3 of the Xishanyao Formation was 26.36%,24.22%,and 22.51%,*** for global paleoclimate effects,the provenance dire

关键词： southern Junggar Basin low ranked coal coalbed methane coal seam correlation sequence stratigraphy sedimentology

Zinc finger transcription factor Sp7/Osterix acts on bone formation and regulates col10a1a expression in zebrafish

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Science Bulletin 2017年第3期62卷 174-184页

作者： Pengfei Niu Zhaomin Zhong Mingyong Wang guodong Huang Shuhao Xu Yi hou Yilin Yan Han Wang Center for Circadian Clocks Soochow University Suzhou 215123 China School of Biology ＆ Basic Medical Sciences Medical College Soochow University Suzhou 215123 China Institute of Neuroscience University of Oregon Eugene OR 97403-1254 USA

Sp7/Osterix as a zinc finger transcription factor is expressed specifically in osteoblasts. Embryonic lethality of Sp7 knockout mice, however, has prevented from examining the functions of Sp7 in osteoblast and bone formation in live animals. Here we used TALEN, a versatile genome-editing tool, to generate one zebrafish sp7 mutant line. Homozygous sp7-/- mutant zebrafish are able to survive to adulthood. Alizarin Red staining and Micro-CT analysis showed that sp7-/- larvae and adult fish fail to develop normal opercula, and display curved tail fins and severe craniofacial malformation, while Alcian Blue staining showed no obvious cartilage defects in sp7-/- fish. Quantitative RT-PCR showed that a number of osteoblast markers including sppl, phex, collala, and collalb are significantly down-regulated in sp7-/- fish. Furthermore, col10a1a, whose ortholog is the cartilage marker in mice, was shown to be a novel downstream gene of Sp7 as an osteoblast marker in zebrafish. Together, these results suggest that Sp7 is required for zebrafish bone development and zebrafish sp7 mutants provide animal models for investigating novel aspects of bone development.

关键词： Sp7/Osterix col10a1a Osteoblast Opercula TALEN Zebrafish