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Neural Mechanism Underlying Task-Specific Enhancement of Motor Learning by Concurrent Transcranial Direct Current Stimulation

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Neuroscience Bulletin 2023年第1期39卷 69-82页

作者： Ying Wang Jixian Wang qing-fang zhang Ke-Wei Xiao Liang Wang qing-Ping Yu qing Xie Mu-Ming Poo Yunqing Wen Institute of Neuroscience State Key Laboratory of NeuroscienceKey Laboratory of Primate NeurobiologyCenter for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai200031China University of Chinese Academy of Sciences Beijing100049China School of Life Science and Technology ShanghaiTech UniversityShanghai201210China Department of Rehabilitation Medicine Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China Shanghai Center for Brain Science and Brain-Inspired Intelligence Technology Lingang LaboratoryShanghai201210China

The optimal protocol for neuromodulation by transcranial direct current stimulation(tDCS)remains *** the rotarod paradigm,we found that mouse motor learning was enhanced by anodal tDCS(3.2 mA/cm^(2))during but not before or after the performance of a ***-task experiments showed that motor learning enhancement was specific to the task accompanied by anodal *** using a mouse model of stroke induced by middle cerebral artery occlusion showed that concurrent anodal tDCS restored motor learning capability in a task-specific *** in vivo Ca^(2+)imaging further showed that anodal tDCS elevated and cathodal tDCS suppressed neuronal activity in the primary motor cortex(M1).Anodal tDCS specifically promoted the activity of task-related M1 neurons during task performance,suggesting that elevated Hebbian synaptic potentiation in task-activated circuits accounts for the motor learning ***,application of tDCS concurrent with the targeted behavioral dysfunction could be an effective approach to treating brain disorders.

关键词： Motor learning tDCS effect Neural mechanism of tDCS Neuronal excitability Stroke model mouse

A SSR Marker for Leaf Rust Resistance Gene Lr19 in Wheat

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Agricultural Sciences in China 2006年第2期5卷 111-115页

作者： LI Xing YANG Wen-xiang LI Ya-ning LIU Da-qun YAN Hong-fei MENG qing-fang zhang Ting Department of Plant Pathology College of Plant Protection Hebei Agricultural University/Biological Control Center of Plant Diseasesand Plant Pests of Hebei Province Baoding 071001 P.R.China

Microsatellite was carded out in Thatcher, six near-isogenic lines and F2 progeny of TcLr19xThatcher to develop molecular markers for leaf rust resistance gene Lr19. Thirteen primer pairs were screened, of which one primer pair Xgwm44 displayed polymorphsim in the population of TcLr 19, Thatcher, and their F2 generations. One marker closed linked to Lr19 resistance trait was obtained, and was named Xgwm44139bp with the genetic distance 0.9 cM. The research shows that Lr19 has more potential in marker-assisted breeding programs in wheat and provides a step stone for mapping genetic map, physical map and the eventual cloning.

关键词： wheat leaf rust Lr19 microsatellite

Identification of AFLP Markers Linked to Lr19 Resistance to Wheat Leaf Rust

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Agricultural Sciences in China 2007年第3期6卷 311-315页

作者： LI Xing YANG Wen-xiang LI Ya-ning LIU Da-qun YAN Hong-fei MENG qing-fang zhang Ting Department of Plant Pathology/Biological Control Center of Plant Diseases and Plant Pests of Hebei Province Agricultural University ofHebei Baoding 071001 P.R.China

AFLP analyses were carried out on Thatcher, 23 near-isogenic lines and F2 generation of TcLr19 × Thatcher, to develop molecular markers for gene Lr19 resistance to wheat leaf rust. Seven markers linked to Lr19 resistance trait were obtained, which were P-AGT/M-GAG289 bp （3.3 cM）, P-ACA/M-GGT102 bp （4.1 cM）, P-ACA/M-GGT106 bp （4.1 cM）, P-AAC/M-CAG123 bp （4.9 cM）, P-AAC/M-GGT203bp （5.0 cM）, P-ACA/M-GGT290bp （5.7 cM）, and P-ATC/M-GAG293bp （9.6 cM）. All of these specific fragments were isolated from the polyacrylamide gels, reamplified, cloned, and sequenced. The research may facilitate genetic mapping, physical mapping, and the eventual cloning of Lr19.

关键词： wheat Lr19 molecular marker AFLP

Global exponential stability of Cohen-Grossberg neural networks with time-varying delays and impulses

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Journal of Shanghai University(English Edition) 2009年第3期13卷 255-259页

作者：祝庆梁芳张青 Department of Mathematics Wuhan University of Technology

In this paper, the Cohen-Grossberg neural networks with time-varying delays and impulses are considered. New sufficient conditions for the existence and global exponential stability of a unique equilibrium point are established by using the fixed point theorem and Lyapunov functional. An example is given to demonstrate the effectiveness of our results.

关键词： Cohen-Grossberg neural networks exponential stability delays impulses

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MnBiDy(Sm)永磁膜的结构和磁性

物理学报 1995年第2期44卷 292-298页

作者：方庆清方瑞宜张胜戴道生安徽省六安师范专科学校北京大学物理系北京100871

报道了采用真空蒸镀的方法制备的MnBiDy(Sm)永磁膜的结构和磁性.Mn:Bi:Dy(Sm)的投料比为2:1:0.10.薄膜经过退出处理(350—425℃,保温4h)后,具有NiAs型hcp结构,C轴垂直膜面,剩余磁感应强度B=3.4-6.5kG,内禀矫顽力_MH_c≈3-8kOe,最大磁能... 详细信息

报道了采用真空蒸镀的方法制备的MnBiDy(Sm)永磁膜的结构和磁性.Mn:Bi:Dy(Sm)的投料比为2:1:0.10.薄膜经过退出处理(350—425℃,保温4h)后,具有NiAs型hcp结构,C轴垂直膜面,剩余磁感应强度B=3.4-6.5kG,内禀矫顽力_MH_c≈3-8kOe,最大磁能积(BH)_(max)=13.39MG·Oe.实验发现,薄膜厚度对MnBiDy(Sm)永磁膜的结构和磁性具有很大的影响.

关键词： MnBiDy(Sm) 永磁膜结构磁性

氢氧化钠替代氨水调节pH值对镍钨电镀的影响

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材料保护 2017年第3期50卷 51-53,84页

作者：张青芳张长科长沙医学院化学教研室湖南长沙410219 湖南纳菲尔新材料科技股份有限公司湖南长沙410200

为延长碱性镍钨合金电镀液的使用周期,在定时定量补加其他组分的前提下,采用氢氧化钠部分替代氨水补加来调节镀液pH值,与氨水补加方式进行比较,考察了2种补加方式下镀液的使用周期、试片硬度和耐盐水腐蚀性能。结果显示:前者可以使镀液... 详细信息

为延长碱性镍钨合金电镀液的使用周期,在定时定量补加其他组分的前提下,采用氢氧化钠部分替代氨水补加来调节镀液pH值,与氨水补加方式进行比较,考察了2种补加方式下镀液的使用周期、试片硬度和耐盐水腐蚀性能。结果显示:前者可以使镀液的使用周期延长约1倍。对2组试片的失重量、维氏硬度和镀速进行配对T检验,耐盐水腐蚀性能基本不变(P=0.549,>0.050,无显著差异),镀层硬度略有提高,镀速降低(P=0,<0.050,有显著差异),具有生产指导意义。

关键词：碱性镍钨电镀 pH值调节氨水氢氧化钠镀液使用周期镀层硬度耐盐水腐蚀性能

P(AA/AM/APEG)/纳米二氧化硅复合高吸水树脂的合成及性能

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精细化工 2017年第2期34卷 145-151页

作者：张太亮范开鑫刘婉琴张芳捷西南石油大学化学化工学院四川成都610550

以丙烯酸(AA)、丙烯酰胺(AM)、烯丙基聚氧乙烯醚(APEG)为单体,再引入纳米二氧化硅(nano-SiO_2),以过硫酸铵为引发剂,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,采用水溶液聚合法制备了P(AA/AM/APEG)/纳米二氧化硅有机/无机复合高吸水性树脂,... 详细信息

以丙烯酸(AA)、丙烯酰胺(AM)、烯丙基聚氧乙烯醚(APEG)为单体,再引入纳米二氧化硅(nano-SiO_2),以过硫酸铵为引发剂,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,采用水溶液聚合法制备了P(AA/AM/APEG)/纳米二氧化硅有机/无机复合高吸水性树脂,考察了交联剂加量、引发剂加量、纳米二氧化硅加量对树脂吸水倍率的影响,并用红外光谱和扫描电镜对产物进行了表征。结果表明:合成最佳条件加入纳米二氧化硅能提高树脂的吸水性能,粒径在80~120目时,复合树脂吸水倍率达到1 865 g/g,P(AA/AM/APEG)树脂吸水倍率为1 681g/g;温度在20~60℃时,复合吸水树脂吸水倍率变化幅度不大;pH在6~8时,其吸水性能最好,吸水倍率为1 865~1 444 g/g;此外,复合树脂具有较好的保水性能,树脂常温下保存15 d,其保水率达到83.2%。红外光谱和扫描电镜分析表明,纳米二氧化硅成功接枝到聚合物上并形成海绵状结构。

关键词：高吸水树脂纳米二氧化硅吸水倍率保水性能功能材料

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山橙属植物生物碱类成分研究进展

中国实验方剂学杂志 2017年第22期23卷 218-225页

作者：方忠莹杜思雨蔡晓青方磊张永清山东中医药大学药学院济南250100 济南大学生物科学与技术学院济南250100 广西师范大学药用资源化学与药物分子工程实验室广西桂林541004

夹竹桃科(Apocynaceae)山橙属(Melodinus)植物在我国民间应用的历史悠久,常用于治疗小儿疝气、小儿疳疾、消化不良、腹痛、小儿脑膜炎、骨折和风湿性心脏病等,其化学成分及生物活性备受国内外学者的关注。生物碱类成分是该属植物重要的... 详细信息

夹竹桃科(Apocynaceae)山橙属(Melodinus)植物在我国民间应用的历史悠久,常用于治疗小儿疝气、小儿疳疾、消化不良、腹痛、小儿脑膜炎、骨折和风湿性心脏病等,其化学成分及生物活性备受国内外学者的关注。生物碱类成分是该属植物重要的活性成分,现已从该属植物中分离到近200个构型新颖、结构复杂的生物碱类化合物。现代药理研究表明,山橙属植物具有抗肿瘤、抗菌、抗生育等生物活性,尤其对人白血病细胞(HL-60),肺癌细胞(A549),肝癌细胞(SMMC-7721),乳腺癌细胞(MCF-7)和结肠癌细胞(SW480)的抑制作用较明显,具有较高的研究价值。其化学成分和生物活性为当前研究的热点所在,但研究较为分散,缺少整体的综合归纳。该文结合近30年来的国内外文献,综合阐述了夹竹桃科山橙属植物中生物碱类成分的研究进展,分别对川山橙、薄叶山橙、尖山橙、思茅山橙、腋花山橙、景东山橙、雷打果和山橙等山橙属植物中吲哚生物碱和喹啉生物碱成分及其活性进行了综述,以期为山橙属植物的进一步开发利用提供参考。

关键词：夹竹桃科山橙属生物碱

Effect of pyrite content on chalcopyrite flotation under different regrinding conditions

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 49-57页

作者： Zejun Wang qing Shi Guofan zhang Yuxuan Zhu Binbin Li School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha 410083China

This study aimed to investigate the effect of varying pyrite(Py)content on copper(Cu)in the presence of different regrinding conditions,which were altered using different types of grinding media:iron,ceramic balls,and their mixture,followed by flotation in the cleaner *** flotation performance of rough Cu concentrate can be improved by changing the regrinding conditions based on the Py *** electron microscopy,X-ray spectrometry,ethylenediaminetetraacetic acid disodium salt extraction,and X-ray photoelectron spectroscopy studies illustrated that when the Py content was high,the use of iron media in regrinding promoted the generation of hydrophilic Fe OOH on the surface of Py and improved the Cu *** ceramic medium with a low Py content prevented excessive Fe OOH from covering the surface of chalcopyrite(Cpy).Electrochemical studies further showed that the galvanic corrosion current of Cpy-Py increased with the addition of Py and became stronger with the participation of iron media.

关键词： chalcopyrite regrinding media pyrite galvanic corrosion flotation