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Electrospinning fabrication and ultra-wideband electromagnetic wave absorption properties of CeO_(2)/N-doped carbon nanofibers

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Nano Research 2022年第9期15卷 7788-7796页

作者： Pei-Yan Zhao Hui-Ya Wang Bo Cai Xiao-Bo Sun zhi-ling Hou Jun-Tao Wu Ming Bai Guang-sheng Wang School of Chemistry Beihang UniversityBeijing 100191China School of Electronics and Information Engineering Beihang UniversityBeijing 100191China College of Mathematics and Physics&Beijing Key Laboratory of Environmentally Harmful Chemical Analysis Beijing University of Chemical TechnologyBeijing 100029China

The impedance mismatch of carbon materials is a key factor limiting their widespread use in electromagnetic(EM)wave *** this work,the novel CeO_(2)/nitrogen-doped carbon(CeO_(2)/N-C)nanofiber was prepared to solve the problem by electrospinning and sintering.X-ray diffraction(XRD),Raman,X-ray photoelectron spectroscopy(XPS),and transmission electron microscopy(TEM)analyses demonstrated CeO_(2)was successfully loaded onto the surface of partially graphitized carbon *** sintering temperatures change the graphitization degree of material,and the oxygen vacancy structure of CeO_(2)and defects from N doping optimize the impedance matching of the *** the sintering temperature reaches 950℃,CeO_(2)/N-C fiber possesses the minimum reflection loss(RLmin)value of−42.59 dB at 2.5 mm with a filler loading of only 3 wt.%in polyvinylidene difluoride(PVDF).Meanwhile,the CeO_(2)/N-C fiber achieves a surprising wideband(8.48 GHz)at a thickness of 2.5 mm,covering the whole Ku-band as well as 63%of the X-band at the sintering temperature of 650℃.This work provides the research basis for widely commercial applications of carbon-based nanofiber absorbers.

关键词： electrospinning electromagnetic wave absorption CeO_(2)/N-doped carbon nanofiber wideband

Overexpression of ACL 1 （abaxially curled leaf 1） Increased Bulliform Cells and Induced Abaxial Curling of Leaf Blades in Rice

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Molecular Plant 2010年第5期3卷 807-817页

作者： ling Li Zhen-Ying Shi Lin Li Ge-zhi Shen Xin-Qi Wang Lin-sheng An Jing-Liu Zhang National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 300 Fenglin Road Shanghai 200032 China Graduate School of the Chinese Academy of Sciences 19 Yuquan Road Beijing 100039 China The Plant Breeding and Cultivation Research Institute Shanghai Academy of Agriculture Sciences 2900 Beidi Road Shanghai 201106 China

Understanding the genetic mechanism underlying rice leaf-shape development is crucial for optimizing rice configuration and achieving high yields; however, little is known about leaf abaxial curling. We isolated a rice transferred DNA （T-DNA） insertion mutant, BY240, which exhibited an abaxial leaf curling phenotype that co-segregated with the inserted T-DNA. The T-DNA was inserted in the promoter of a novel gene, ACL1 （Abaxially Curled Leaf 1）, and led to overexpression of this gene in BY240. Overexpression of ACL1 in wild-type rice also resulted in abaxial leaf curling. ACL1 encodes a protein of 116 amino acids with no known conserved functional domains. Overexpression of ACL2, the only homolog of ACL1 in rice, also induced abaxial leaf curling. RT-PCR analysis revealed high expressions of ACLs in leaf sheaths and leaf blades, suggesting a role for these genes in leaf development. In situ hybridization revealed non-tissue-specific expression of the ACLs in the shoot apical meristem, leaf primordium, and young leaf. Histological analysis showed increased number and exaggeration of bulliform cells and expansion of epidermal cells in the leaves of BY240, which caused developmental discoordination of the abaxial and adaxial sides, resulting in abaxially curled leaves. These results revealed an important mechanism in rice leaf development and provided the genetic basis for agricultural improvement.

关键词： Cell expansion leaf/vegetative development rice ACL1 ACL2 LRI T-DNA bulliform cells.

“因地制宜”改建“蜗居”实验动物设施的实践探索

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中国医药生物技术 2024年第3期19卷 272-274页

作者：王姗姗汪凯生安志田广昂田聆上海市胸科医院/上海交通大学医学院附属胸科医院中心实验室 200030

推进研究型医院建设、创建“基础研究-临床研究-成果转化及产业化-临床应用”产学研医的创新体系,是国家既定的医疗战略[1-2],也是我院坚定不移的发展蓝图。建设研究型医院,其中高质量的实验动物中心是必不可少的基础性科研平台。然而,... 详细信息

推进研究型医院建设、创建“基础研究-临床研究-成果转化及产业化-临床应用”产学研医的创新体系,是国家既定的医疗战略[1-2],也是我院坚定不移的发展蓝图。建设研究型医院,其中高质量的实验动物中心是必不可少的基础性科研平台。然而,由于我院地处市中心,建筑面积有限、空间资源高度紧张,仅在院区内西南角有一个面积还不到120 m^(2),配备有192个实验大小鼠IVC饲养笼位的老旧实验动物设施,严重落后于医院日益增长的科研需求,也与全新的国家有关实验动物设施的管理标准相距甚远。因此,我院于2021年底开始对旧实验动物设施进行一系列“因地制宜”的升级、改造和重建。这期间的实践探索过程异常艰辛、曲折,但坚持“因地制宜”的灵活策略,改建“蜗居”实验动物设施是可行的,也是行之有效的。

关键词：实践探索成果转化实验动物设施产学研科研平台研究型医院创新体系因地制宜

饵料种类及浓度对翡翠贻贝(Perna viridis)生理代谢及碳氮收支的影响

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海洋与湖沼 2024年第4期55卷 979-987页

作者：任鹏刘敬灿鲍凌翔胡青松张兴志彭金霞王爱民刘春胜海南大学海洋生物与水产学院海南海口570228 广西壮族自治区水产科学研究院、广西水产遗传育种与健康养殖重点实验室广西南宁530021 海南国际蓝碳研究中心海南海口571126

为了探究饵料种类及浓度对翡翠贻贝生理代谢和碳氮收支的影响,在实验室条件下测量了3种微藻饵料(球等鞭金藻、牟氏角毛藻和亚心形扁藻)及3个饵料浓度(2.2、4.4和6.6 mg/L,干重)交互作用下翡翠贻贝的摄食率、呼吸率、排泄率、排粪率及钙... 详细信息

为了探究饵料种类及浓度对翡翠贻贝生理代谢和碳氮收支的影响,在实验室条件下测量了3种微藻饵料(球等鞭金藻、牟氏角毛藻和亚心形扁藻)及3个饵料浓度(2.2、4.4和6.6 mg/L,干重)交互作用下翡翠贻贝的摄食率、呼吸率、排泄率、排粪率及钙化率,继而对翡翠贻贝在相应条件下的碳氮收支进行了计算。研究结果表明:翡翠贻贝摄食率受微藻种类影响不明显,但随饵料浓度的增加而显著增加;呼吸率和排泄率主要受饵料种类影响,且饵料种类和浓度之间存在显著的交互作用,在高饵料浓度条件下牟氏角毛藻组呼吸率高于亚心形扁藻组和球等鞭金藻组;饵料种类和浓度显著影响翡翠贻贝排粪率,在相同饵料浓度下,牟氏角毛藻处理组排粪率高于其他两种微藻组;同种微藻条件下,排粪率随饵料浓度的增加而升高;翡翠贻贝钙化率受饵料种类及浓度影响不显著。碳收支方面,排粪碳与生长碳占翡翠贻贝所摄食碳量的78.37%~96.22%。各饵料组生长碳占比随饵料浓度增加而升高,投喂高浓度(4.4和6.6 mg/L)球等鞭金藻和牟氏角毛藻的翡翠贻贝生长碳占比较高(71.75%~74.49%)。氮收支方面,球等鞭金藻组和亚心形扁藻组翡翠贻贝生长氮随饵料浓度增加而增加,而排泄氮呈相反趋势。低饵料浓度条件下,牟氏角毛藻组生长氮和排粪氮最高,而排泄氮最低。

关键词：翡翠贻贝微藻种类饵料浓度碳氮收支

同时鉴别诊断H7亚型和5种NA亚型禽流感病毒GeXP检测方法的建立

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中国人兽共患病学报 2024年第7期40卷 670-677页

作者：罗思思谢芝勋李孟李丹谢丽基王盛张民秀黄娇玲谢志勤曾婷婷张艳芳广西壮族自治区兽医研究所/广西兽医生物技术重点实验室/农业农村部中国(广西)—东盟跨境动物疫病防控重点实验室南宁530001

目的旨在建立同时鉴别诊断H7亚型及其5种NA亚型(N2、N3、N4、N7和N9)AIV的检测方法。方法针对H7亚型HA基因、5种NA亚型NA基因和所有亚型AIV M基因的保守序列,分别设计了6对亚型特异性引物和1对AIV亚型通用检测引物,利用GeXP多基因表达... 详细信息

目的旨在建立同时鉴别诊断H7亚型及其5种NA亚型(N2、N3、N4、N7和N9)AIV的检测方法。方法针对H7亚型HA基因、5种NA亚型NA基因和所有亚型AIV M基因的保守序列,分别设计了6对亚型特异性引物和1对AIV亚型通用检测引物,利用GeXP多基因表达和毛细管电泳分析技术,建立同时检测H7亚型和5种NA亚型AIV的GeXP高通量分型鉴别诊断方法,对其进行特异性、敏感性和临床样品检测。结果特异性结果显示该法单管可同时检测H7、N2、N3、N4、N7和N9亚型AIV,均能检出对应的亚型AIV,通用检测引物检出所有亚型AIV,与其它常见禽病病原体不存在交叉反应。敏感性结果显示该法对7种AIV目的基因(含H7、N2、N3、N4、N7、N9基因)浓度均为100拷贝/μL时,仍可同时检测出。该法对150份临床样品的检测结果与病毒分离鉴定一致。结论本研究建立的同时鉴别诊断H7亚型和5种亚型AIV GeXP高通量检测方法具有特异性强、敏感性高、快速和简便等优点,为防控AIV提供新型检测方法。

关键词： H7亚型 NA亚型禽流感病毒 GeXP 高通量

Preparation,Characterization and Thermal Decomposition Kinetics of the Complexes [Dy(p-NBA)_3Phen]_2·3H_2O and [Dy(m-NBA)_3Phen]_2·4H_2O

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Chemical Research in Chinese Universities 2009年第5期25卷 719-725页

作者： XU Su-ling ZHU zhi-jia Ren Ning LIU Hong-mei ZHANG Jian-jun TIAN Liang HU Rui-sheng Experimental Center Hebei Normal University Shoiazhuang 050016 P R. China Department of Engineering Shijiazhuang Foreign Economy and Trade Vocational College Shijiazhuang 050061 P. R. China College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 13. R. China Department of Chemistry Handan College Handan 056005 P R. China College of Chemistry and Pharmacy Engineering Hebei University of Science and Technology Shijiazhuang 050018 P R. China School of Chemical Engineering Sho＇iazhuang College Shoiazhuang 050035 P. R. China

The title complexes [Dy（p-NBA）3Phen]2-3H2O（Ⅰ） and [Dy（m-NBA）3Phen]2·4H2O（Ⅱ） were synthesized, in the two molecular formulas of which NBA is nitrobenzoate and Phen is 1,10-phenanthroline. The characterizations of the complexes were carried out by means of elemental analysis, UV, IR, XRD and molar conductivity. The thermal decomposition of the two complexes were studied under the non-isothermal condition by DSC, TG-DTG and IR methods in detail. The kinetic parameters of the dehydration process were also obtained by the analysis of DSC curves of the two complexes with Popescu and Vyazovkin methods, respectively.

关键词： Dysprosium(Ⅲ) complex Nitrobenzoate Non-isothermal kinetics 1,10-Phenanthroline Thermal decomposition

Unveiling stability of multiple filamentation caused by axial symmetry breaking of polarization

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Photonics Research 2016年第5期4卷 29-34页

作者： Si-Min Li zhi-Cheng Ren ling-Jun Kong sheng-Xia Qian Chenghou Tu Yongnan Li Hui-Tian Wang MOE Key Laboratory of Weak Light Nonlinear Photonics and School of Physics Nankai University National Laboratory of Solid State Microstructures and School of Physics Nanjing University Collaborative Innovation Center of Advanced Microstructures Nanjing University

Femtosecond laser filamentation is generally initialized from unpredictable symmetry breaking caused by random noise, causing it to be barely controlled. However, it is always anticipated for stable and controllable *** present and demonstrate the idea that hybridly polarized vector fields with axial symmetry broken polarization, associated with a pair of orthogonally linearly polarized vortices carrying the opposite-handed orbital angular momenta, could achieve controllable and robust multiple filamentation. Here, our motivation is to unveil the underlying physics behind such controllable and robust multiple filamentation. The symmetry breaking should first be actively controllable and then be able to effectively inhibit random noise. Robust multiple filamentation is inseparable from the fact that the phases between the multiple filaments are always locked. In contrast, uncontrollable multiple filamentation is always accompanied with loss of phase, i.e., the multiple filaments become incoherent to each other. Our results may offer a suggestion for achieving controllable and robust multiple filamentation in other systems.

关键词： AV HP

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基于蒙特卡洛模拟的虚拟测试场景生成方法

计算机仿真 2024年第2期41卷 473-476,481页

作者：姚明菊李志远羊雪玲马军生吉利学院智能科技学院四川成都610000 国防科技大学信息通信学院湖北武汉430000

为了提高用户在虚拟测试场景中的体验感,提高虚拟测试场景的真实度,提出基于蒙特卡洛模拟的虚拟测试场景生成方法。采用Meanshift分割方法分割输入图像,并对分割后的图像块实施融合,标记图像区域,获取对应的深度图,融合上述深度图获得... 详细信息

为了提高用户在虚拟测试场景中的体验感,提高虚拟测试场景的真实度,提出基于蒙特卡洛模拟的虚拟测试场景生成方法。采用Meanshift分割方法分割输入图像,并对分割后的图像块实施融合,标记图像区域,获取对应的深度图,融合上述深度图获得虚拟测试场景的深度图。采用透射率估计方法融合虚拟测试场景的深度图,通过梯度融合方法融合归一化处理低照度图像,将支持向量机学习方法引入场景生成过程中,控制场景生成过程。采用蒙特卡洛模拟方法消除场景中存在的噪声斑点,优化生成的虚拟测试场景。实验结果表明,研究方法的场景生成误差较小,生成的虚拟测试场景具有较高的逼真度和真实感。

关键词：蒙特卡洛模拟透射率估计方法梯度融合方法虚拟测试场景生成

Partial improvement in performance of patients with severe Alzheimer's disease at an early stage of fornix deep brain stimulation

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Neural Regeneration Research 2018年第12期13卷 2164-2172页

作者： zhi-Qi Mao Xin Wang Xin Xu zhi-Qiang Cui Long-sheng Pan Xiao-Jing Ning Bai-Xuan Xu Lin Ma zhi-Pei ling Jian-Jun Jia Xin-Guang Yu Department of Neurosurgery Chinese PLA General Hospital School of Medicine Nankai University Department of Nuclear Medicine Chinese PLA General Hospital Department of Radiology Chinese PLA General Hospital Department of Neurology Chinese PLA General Hospital

Deep brain stimulation is a therapy for Alzheimer＇s disease（AD） that has previously been used for mainly mild to moderate cases. This study provides the first evidence of early alterations in performance induced by stimulation targeted at the fornix in severe AD patients. The performance of the five cases enrolled in this study was scored with specialized assessments including the Mini-Mental State Examination and Clinical Dementia Rating, both before and at an early stage after deep brain stimulation. The burden of caregivers was also evaluated using the Zarit Caregiver Burden Interview. As a whole, the cognitive performance of patients remained stable or improved to varying degrees, and caregiver burden was decreased. Individually, an improved mental state or social performance was observed in three patients, and one of these three patients showed remarkable improvement in long-term memory. The conditions of another patient deteriorated because of inappropriate antipsychotic medications that were administered by his caregivers. Taken together, deep brain stimulation was capable of improving some cognitive aspects in patients with severe AD, and of ameliorating their emotional and social performance, at least at an early stage. However, long-term effects induced by deep brain stimulation in patients with severe AD need to be further validated. More research should focus on clarifying the mechanism of deep brain stimulation. This study was registered with ***（NCT03115814） on April 14, 2017.

关键词： Alzheimer's disease deep brain stimulation fornix cognition memory mood performance early stage functional neurosurgery dementia