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Identification of QTLs and Validation of qCd-2 Associated with Grain Cadmium Concentrations in Rice

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Rice science 2019年第1期26卷 42-49页

作者： liu Wenqiang PAN Xiaowu LI Yongchao DUAN Yonghong MIN jun liu sanxiong liu Licheng SHENG Xinnian LI Xiaoxiang Hunan Rice Research Institute Hunan Academy of Agricultural Sciences/Key Laboratory of Indica Rice Genetics and Breeding in the Middle and Lower Reaches of Yangtze River Valley Ministry of Agriculture

Cadmium(Cd) is one of heavy metals harmful to human health. As rice is the main staple food in Asia and Cd is easily contaminated in rice, the molecular regulation of Cd accumulation should be explored. In this study, a recombinant inbred population derived from Xiang 743/Katy was grown in Cd-polluted fields and used to map the quantitative trait loci(QTLs) for Cd accumulation in rice grains. We identified seven QTLs distributed on chromosomes 2, 3, 6, 7, 8 and 10. These QTLs displayed phenotypic variances of 58.50% and 40.59% in 2014 and 2015, respectively. Two QTLs, qCd-2 and qCd-7, were identified in both the two years. qCd-2 was detected on the interval of RM250–RM207 on chromosome 2, with an LOD of 2.51 and a phenotypic contribution of 13.75% in 2014, and an LOD of 3.35 and a phenotypic contribution of 14.16% in 2015. qCd-7 co-localized with the cloned qCdT7 on chromosome 7 and may represent the correct candidate. The other five QTLs were detected only in one year. To further confirm the effects of qCd-2, a residual heterozygous line designated as RHL945, with a heterozygous interval of RM263–RM207 on chromosome 2, was selected from the recombinant inbred population and used to develop an F2 population consisting of 155 individual plants. By incorporating further simple sequence repeat markers into the segmental linkage map of the target region, qCd-2 was delimited in the interval of RM5404–RM3774, with an LOD value of 4.38 and a phenotypic contribution of 15.52%. These results reflected the genetic regulation of grain Cd in rice and paved the way for the future cloning of qCd-2.

关键词： cadmium recombinant inbred line quantitative trait locus rice simple sequence repeat

Process Optimization and Reaction Mechanism of Removing Copper From an Fe-Rich Pyrite Cinder Using Chlorination Roasting

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Journal of Iron and Steel Research International 2013年第8期20卷 20-26页

作者： liu Jian WEN Shu-ming CHEN Yu liu Dan BAI Shao-jun WU Dan-dan Faculty of Land Resource Engineering Kunming University of Science and Technology Dongbao District Administration of Work Safety

The aim is to remove copper from a pyrite cinder by optimizing the chlorination roasting process using re-sponse surface methodology （RSM） and the reaction mechanism of chlorination roasting based on thermodynamic calculation was discussed. A quadratic model was suggested by RSM to correlate the key parameters, namely, dos-age of chlorinating agent, roasting temperature and roasting time to the copper volatilization ratio. The results indi- cate that the model is well consistent with the experimental data at a correlation coefficient （R2） of 0.95, and the dosage of chlorinating agent and roasting temperature both have significant effects on the copper volatilization ratio. However, a roasting temperature exceeding 1170 ~C decreases the volatilization ratio. The optimum conditions for removing copper from the cinder were identified as chlorinating agent dosage at 5%, roasting temperature at i155.10 ℃ and roasting time of 10 min; under Such a conditiom a copper volatilization ratid of 95.16% Was a- chieved from the cinder. Thermodynamic calculation shows that SiO2 in the pellet plays a key role in the chlorine re-lease from calcium chloride, and the chlorine release reactions cannot occur without it.

关键词： process optimization chlorination roasting pyrite cinder removing copper

Understanding the superior mechanical properties of Mg-3Al-Zn alloy sheets:Role of multi-type unique textures

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International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1104-1112页

作者： jun Xu jun Zhao Bin Jiang Wenjun liu Hong Yang Xintao Li Yuehua Kang Nan Zhou Kaihong Zheng Fusheng Pan Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China School of Mechanical and Electrical Engineering Hunan City UniversityYiyang 413002China National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China Chongqing Institute for Advanced Light Metals Chongqing 400030China College of Materials Science and Engineering Chongqing University of TechnologyChongqing 400054China

Mg-3Al-1Zn(AZ31)sheets were produced by transverse gradient extrusion(TGE)*** flow behavior and dynamic recrystallization during extrusion were systematically *** microstructures,textures,and mechanical behavior of extruded AZ31 sheet were also analyzed and compared with conventional extruded(CE)*** results showed that fine grain structure and multi-type unique textures were formed in TGE sheet because of the generation of extra flow velocity along transverse direction(TD)and flow velocity gradient along extrusion direction(ED)during *** basal poles gradually deviated away normal direction(ND)from edge to center of the TGE sheet along TD,and the largest inclination angle at center region reached around 65°.Furthermore,the basal poles inclined from ED to TD 40°-63°,except for the center region of TGE *** TGE sheet presented higher ductility and strain hardening exponent(n-value),but lower yield strength and Lankford value(r-value)in comparison with the CE *** the basalslip and tensile twins were easy to be activated during deformation,and the largest elongation of 41%and the lowest yield strength of 86.5 MPa were obtained for the ED-center sample in the TGE sheet.

关键词： transverse gradient extrusion multi-type unique textures mechanical properties

基于超声特征的列线图模型鉴别诊断膀胱隆起样病变良恶性的价值

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中国医学影像学杂志 2024年第8期32卷 841-844页

作者：张静梁羽范尔兮胥桐李璇黄富洪宋军刘娟四川省医学科学院·四川省人民医院超声科四川成都610072 四川省医学科学院·四川省人民医院病理科四川成都610072

目的构建基于超声特征的列线图模型,探讨其鉴别诊断良、恶性膀胱隆起样病变的价值。资料与方法回顾性分析2016年1月—2022年1月四川省人民医院经手术病理证实的膀胱隆起样病变538例(良性84例,恶性454例)的超声资料,对膀胱病变超声特征(... 详细信息

目的构建基于超声特征的列线图模型,探讨其鉴别诊断良、恶性膀胱隆起样病变的价值。资料与方法回顾性分析2016年1月—2022年1月四川省人民医院经手术病理证实的膀胱隆起样病变538例(良性84例,恶性454例)的超声资料,对膀胱病变超声特征(病灶部位、数目、最大径线、回声、形态、基底、钙化、彩色多普勒血流显像信号)及患者简要临床指标(性别、年龄、泌尿系恶性肿瘤史、肉眼血尿)行Logistic单因素及多因素回归分析,筛选出独立预测因子,并构建预测模型。通过Bootstrap重抽样进行内部验证。绘制受试者工作特征曲线、校正曲线、临床决策曲线评估模型。结果单因素及多因素Logistic回归分析结果显示,性别(OR=1.822,P=0.038)、年龄(OR=1.044,P=0.000)、病灶部位(OR=0.359,P=0.000)、血流信号(OR=2.052,P=0.007)是预测恶性膀胱隆起样病变的独立因素,基于单因素结果构建的列线图预测模型的曲线下面积为0.780,敏感度为72.91%,特异度为71.43%,准确度为72.68%。校正曲线显示模型的一致性较好。临床决策曲线显示临床净获益良好。结论基于超声特征和简要临床指标构建的列线图模型鉴别诊断良、恶性膀胱隆起样病变具有较高的准确度和潜在的临床应用价值。

关键词：膀胱肿瘤超声检查列线图表诊断,鉴别预测

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Development of calcium coke for CaC2 production using calcium carbide slag and coking coal

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 76-87页

作者： Xu-zhong Gong jun-qiang Zhang Zhi Wang Dong Wang jun-hao liu Xiao-dong Jing Guo-yu Qian Chuan Wang Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Chemical Engineering School University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China Department of Process Metallurgy Swerim ABLulea 97125Sweden

A type of calcium coke was developed for use in the oxy-thermal process of calcium carbide *** calcium coke was prepared by the co-pyrolysis of coking coal and calcium carbide slag, which is a solid waste generated from the chlor-alkali *** characteristics of the calcium cokes under different conditions were analyzed experimentally and *** results show that the thermal strength of calcium coke increased with the increase in the coking coal proportion, and the waterproof property of calcium coke also increased with increased carbonation *** calcium coke can increase the contact area of calcium and carbon in the calcium carbide production ***, the pore structure of the calcium coke can enhance the diffusion of gas inside the furnace, thus improving the efficiency of the oxy-thermal technology.

关键词： calcium carbide slag calcium carbide production calcium coke thermal strength waterproof property

FoxO is required for optimal fitness of the migratory brown planthopper, Nilaparvata lugens (Hemiptera: Delphacidae)

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Insect Science 2023年第5期30卷 1352-1362页

作者： Jin-Li Zhang Ke-Liang liu Xin-Yu Cai Xin-Yang liu Hai-jun Xu State Key Laboratory of Rice Biology Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang ProvinceInstitute of Insect SciencesCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina

The forkhead box O(FoxO)protein is the main transcriptional effector downstream of the insulin/insulin-like signaling pathway and regulates many developmental and physiological *** insects with loss-of-function mutations in FoxO exhibit phenotypes distinct from those of hemimetabolous insects in which RNA interference was *** the functional importance of FoxO,whether hemimetabolous insects share an evolutionally conserved function of FoxO with holometabolous insects remains to be *** used the clustered regularly interspaced short palindromic repeats/CRISPR-associated 9(CRISPR/Cas9)genome editing-system to establish a homozygous FoxO-null mutant(NlFoxO^(4E))of the wing-dimorphic brown planthopper(BPH)Nilaparvata lugens,an economically important insect pest of rice *** phenotypes of NlFoxO^(4E) mutants included extended nymphal duration,shortened lifespan,reduced reproduction,and decreased stress *** addition,depletion of NlFoxO promoted cell proliferation in wing buds and led to 100%long-winged morphs,in stark contrast to short-winged wild-type *** findings indicate that NlFoxO is highly functionally conserved with its counterpart in holometabolous insects,and is required for optimal fitness of *** insights from FoxO studies may facilitate the identification of potential target genes for BPH control applications.

关键词： cell proliferation CRISPR/Cas9 FoxO longevity planthopper reproduction

面向暗光场景的目标偏振/可见光融合检测方法

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计算机测量与控制 2024年第4期32卷 46-53页

作者：马如钺王晨光曹慧亮申冲唐军刘俊中北大学信息与通信工程学院太原030051 中北大学仪器与电子学院太原030051

为解决偏振暗光场景下常见目标识别结果准确性不高的问题,提出了基于卷积神经网络的偏振度图像与可见光图像融合算法,设计了新的损失函数以形成无监督学习过程,引入拉普拉斯算子提高融合图像的质量,最终将被测目标的偏振信息与可见光信... 详细信息

为解决偏振暗光场景下常见目标识别结果准确性不高的问题,提出了基于卷积神经网络的偏振度图像与可见光图像融合算法,设计了新的损失函数以形成无监督学习过程,引入拉普拉斯算子提高融合图像的质量,最终将被测目标的偏振信息与可见光信息有效结合;提出了基于改进的YOLOv5算法对融合后的目标进行目标检测,在网络框架中加入CA注意力机制,将通道注意力机制与空间注意力机制相结合;在自制的数据集上对提出的网络进行训练测试,结果表明,融合图像在主客观上都达到了较好的视觉效果,将改进的YOLOv5算法相比最优的YOLOv5s模型,精确率和召回率分别达到了89.3%和82.5%,均值平均精度分别提高了2.6%和1.8%。

关键词：偏振成像目标检测图像融合 YOLOv5 图像增强注意力机制

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Pressure infiltration of molten aluminum for densification of environmental barrier coatings

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Journal of Advanced Ceramics 2022年第1期11卷 145-157页

作者： Lin DONG Mei-jun liu Xiao-Feng ZHANG Xue-Shi ZHUO Jia-Feng FAN Guan-jun YANG Ke-Song ZHOU State Key Laboratory for Mechanical Behavior ofMaterials School ofMaterials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China National Engineering Laboratory for Modern Materials Surface Engineering Technology Institute of New MaterialsGuangdong Academy of ScienceGuangzhou 510650China

Environmental barrier coatings(EBCs)effectively protect the ceramic matrix composites(CMCs)from harsh engine environments,especially steam and molten ***,open pores inevitably formed during the deposition process provide the transport channels for oxidants and corrosives,and lead to premature failure of *** research work proposed a method of pressure infiltration densification which blocked these open pores in the *** results showed that it was difficult for aluminum to infiltrate spontaneously,but with the increase of external gas pressure and internal vacuum simultaneously,the molten aluminum obviously moved forward,and finally stopped infiltrating at a depth of a specific *** on the wrinkled zigzag pore model,a mathematical relationship between the critical pressure with the infiltration depth and the pore intrinsic geometry was *** infiltration results confirmed this relationship,indicating that for a given coating,a dense thick film can be obtained by adjusting the internal and external gas pressures to drive a melt infiltration.

关键词： infiltration process channel pore densification pressure assistant environmental barrier coating(EBC)

纳米抗菌三聚氰胺浸渍胶膜纸饰面板的制备及性能研究

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林产工业 2024年第9期61卷 13-19页

作者：陈学山张军华李川川郭洪武刘毅山东东宇鸿翔装饰材料有限公司山东寿光262700 木质材料科学与应用教育部重点实验室(北京林业大学) 北京100083

研发了具有抗菌功能的三聚氰胺浸渍胶膜纸饰面板(三聚氰胺板),并对其相关性能进行了测试。结果表明:改性后纳米抗菌剂Ag/TiO_(2)和ZnO依然保持良好的抗菌性能,其大肠杆菌抑菌圈直径分别减小1.47%和3.31%,金黄色葡萄球菌抑菌圈直径分别减... 详细信息

研发了具有抗菌功能的三聚氰胺浸渍胶膜纸饰面板(三聚氰胺板),并对其相关性能进行了测试。结果表明:改性后纳米抗菌剂Ag/TiO_(2)和ZnO依然保持良好的抗菌性能,其大肠杆菌抑菌圈直径分别减小1.47%和3.31%,金黄色葡萄球菌抑菌圈直径分别减小2.47%和0.99%。硅烷偶联剂KH560和KH570成功接枝在纳米抗菌剂Ag/TiO_(2)和ZnO表面。表面有机改性未改变纳米抗菌剂的化学结构和晶体结构,通过形成空间位阻效应提高了纳米粒子表面张力,降低了粉体团聚现象。复配纳米抗菌剂(Ag/TiO_(2)&ZnO)添加比例为1%时,对大肠杆菌和金黄色葡萄球菌的抗菌率分别为99.2%和99.5%。三聚氰胺板各项物理力学指标均满足GB/T 15102—2017《浸渍胶膜纸饰面纤维板和刨花板》标准的质量要求。

关键词：三聚氰胺浸渍胶膜纸三聚氰胺浸渍胶膜纸饰面板纳米抗菌剂表面改性抗菌性能

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