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correlating the fluctuated growth of carbon nanotubes with catalyst evolution by atmospheric-pressure environmental transmission electron microscopy

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Nano Research 2023年第11期16卷 12781-12787页

作者： Rui-Hong Xie Lili Zhang Ruixue ma Xin-Yu Jiao Dai-Ming Tang chang Liu Hui-Ming cheng Shenyang National Laboratory for materials Science Institute of Metal Research(IMR)Chinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Research center for materials Nanoarchitectonics(maNA) National Institute for Materials Science(NIMS)TsukubaIbaraki 305-0044Japan School of materials Science and Engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Rate-controlled growth of carbon nanotubes(cNTs)and catalyst design are considered efficient ways for the preparation of cNTs with specific structures and ***,due to the difficulties in capturing the growth process of the cNTs with tiny size under a complex growth environment,the growth kinetics of cNTs and their correlation with the catalyst seed have been seldom ***,we investigated the growth process of cNTs from Ni nanoparticles(NPs)in real-time under atmospheric pressure using transmission electron microscopy equipped with a closed gas *** was found that the growth rates of cNTs fluctuated,and a phase transition from Ni_(3)c to Ni,and a reshaping of the catalyst NPs occurred during the growth *** demonstrated that cNTs dynamically interacted with the connected catalyst NPs and the fluctuated growth rates of cNTs were correlated with the structure change of catalyst *** origin of the growth rate fluctuation is attributed to the change of carbon concentration gradient in catalyst NPs.

关键词： carbon nanotube growth rate nickel catalyst in situ transmission electron microscopy

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不同品种辣椒秸秆生物量及饲料营养价值研究

西北农林科技大学学报（自然科学版） 2024年第7期52卷 1-8,20页

作者：程志泽艾比布拉·伊马木马小龙万江春伊斯拉依·达吾提新疆农业大学草业学院新疆乌鲁木齐830000 新疆农业科学院玛纳斯农业试验站新疆玛纳斯832200

【目的】研究辣椒秸秆的生物量和饲料营养价值,为辣椒秸秆合理饲用提供基础数据。【方法】以改良陕早红、灯笼椒和羊角椒3个品种辣椒秸秆为研究对象,对其生物量、结构组成(叶、茎、残留辣椒所占比例)和营养成分(粗蛋白(cP)、中性洗涤纤... 详细信息

【目的】研究辣椒秸秆的生物量和饲料营养价值,为辣椒秸秆合理饲用提供基础数据。【方法】以改良陕早红、灯笼椒和羊角椒3个品种辣椒秸秆为研究对象,对其生物量、结构组成(叶、茎、残留辣椒所占比例)和营养成分(粗蛋白(cP)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、可溶性碳水化合物(WSc)、粗脂肪(EE))进行比较分析,并采用康奈尔净碳水化合物-蛋白质体系(cNcPS)和体外产气试验对比分析辣椒秸秆与玉米秸秆的饲用营养价值。【结果】辣椒秸秆由叶、茎和残留辣椒构成,鲜辣椒秸秆产量最高达39437.55 kg/hm^(2);在鲜、干辣椒秸秆结构构成中,茎质量比例最高,平均为50.17%和56.28%,其次是叶(37.51%,30.69%)和残留辣椒(12.32%,13.03%)。辣椒秸秆叶片的cP含量最高,平均为20.11%,其次是残留辣椒(18.67%)和茎(12.11%),全株辣椒秸秆中的cP含量平均值为15.42%,且品种间存在显著差异(Pc和EE含量最高,平均值分别为11.91%和5.68%;辣椒秸秆叶、茎、残留辣椒和全株均含有辣椒素,3个品种间含量差异显著(PcA)、中速降解碳水化合物(cB1)、非结构性碳水化合物(cNSc)、不可利用纤维(cc)以及粗蛋白中非蛋白氮(PA)、快速降解真蛋白质(PB1)含量均显著高于玉米秸秆(PcHO)、缓慢降解碳水化合物(cB2)、慢速降解真蛋白质(PB3)和不可利用蛋白质(Pc)含量显著低于玉米秸秆(Pc)、DM降解率均高于玉米秸秆,发酵液NH 3-N质量浓度低于玉米秸秆,表明辣椒秸秆有较高的饲料营养价值。【结论】辣椒秸秆可全部或部分替换玉米秸秆作为反刍动物的粗饲料。

关键词：辣椒秸秆生物量营养成分体外产气法

IFN-γ对原代喉癌细胞增殖及血管内皮生长因子-c转录的影响

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中国生化药物杂志 2010年第4期31卷 261-262页

作者：马韬黑龙江齐齐哈尔市五官医院黑龙江齐齐哈尔161006

目的研究IFN-γ对体外培养的原代喉癌细胞的作用。方法采用MTT比色法观察IFN-γ对原代喉癌细胞生长的影响。实时PcR法观察IFN-γ对原代喉癌细胞血管内皮生长因子c(VEGF-c)基因表达的影响。结果 IFN-γ对原代喉癌细胞生长的抑制作用呈剂... 详细信息

目的研究IFN-γ对体外培养的原代喉癌细胞的作用。方法采用MTT比色法观察IFN-γ对原代喉癌细胞生长的影响。实时PcR法观察IFN-γ对原代喉癌细胞血管内皮生长因子c(VEGF-c)基因表达的影响。结果 IFN-γ对原代喉癌细胞生长的抑制作用呈剂量依赖性;1000U/mLIFN-γ作用于原代喉癌细胞后48h后,VEGF-c基因转录水平明显下调。结论 IFN-γ抑制原代喉癌细胞的增殖,下调VEGF-c基因表达,为寻求喉癌免疫治疗提供了新途径。

关键词： IFN-γ 原代喉癌细胞血管内皮生长因子c

Double heterozygous pathogenic mutations in KIF3c and ZNF513 cause hereditary gingival fibromatosis

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International Journal of Oral Science 2023年第3期15卷 489-501页

作者： Jianfan chen Xueqing Xu Song chen Ting Lu Yingchun Zheng Zhongzhi Gan Zongrui Shen Shunfei ma Duocai Wang Leyi Su Fei He Xuan Shang Huiyong Xu Dong chen Leitao Zhang Fu Xiong Department of Medical Genetics Experimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhouChina Experimental Department of Obstetrics and Gynecology Institute The Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina Department of Precision Medicine Shenzhen HospitalSouthern Medical UniversityShenzhenChina Department of Stomatology Nanfang HospitalSouthern Medical UniversityGuangzhouChina Department of Stomatology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina Guangdong Provincial Key Laboratory of Single cell Technology and Application GuangzhouChina Department of Fetal Medicine and Prenatal Diagnosis Zhujiang HospitalSouthern Medical UniversityGuangzhouChina

Hereditary gingival fibromatosis(HGF)is a rare inherited condition with fibromatoid hyperplasia of the gingival tissue that exhibits great genetic *** distinct loci related to non-syndromic HGF have been identified;however,only two diseasecausing genes,SOS1 and REST,inducing HGF have been identified at two loci,GINGF1 and GINGF5,***,based on a family pedigree with 26 members,including nine patients with HGF,we identified double heterozygous pathogenic mutations in the ZNF513(c.c748T,p.R250W)and KIF3c(c.G1229A,p.R410H)genes within the GINGF3 locus related to *** studies demonstrated that the ZNF513 p.R250W and KIF3c p.R410H variants significantly increased the expression of ZNF513 and KIF3c in vitro and in ***513,a transcription factor,binds to KIF3c exon 1 and participates in the positive regulation of KIF3c expression in gingival ***,a knock-in mouse model confirmed that heterozygous or homozygous mutations within Zfp513(p.R250W)or Kif3c(p.R412H)alone do not led to clear phenotypes with gingival fibromatosis,whereas the double mutations led to gingival hyperplasia *** addition,we found that ZNF513 binds to the SOS1 promoter and plays an important positive role in regulating the expression of ***,the KIF3c p.R410H mutation could activate the PI3K and KcNQ1 potassium ***513 combined with KIF3c regulates gingival fibroblast proliferation,migration,and fibrosis response via the PI3K/AKT/mTOR and Ras/Raf/MEK/ERK *** summary,these results demonstrate ZNF513+KIF3c as an important genetic combination in HGF manifestation and suggest that ZNF513 mutation may be a major risk factor for HGF.

关键词： gingival KIF hereditary

Dual-site lattice co-doping strategy regulated crystal-structure and microstructure for enhanced cycling stability of co-free Ni-rich layered cathode

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Nano Research 2023年第7期16卷 9250-9258页

作者： Lei Liu Yan Zhao Guanghui Jiang Liang Shan Zelong Yang Yaoqiang ma Yingjie Zhang Qi Meng Peng Dong Faculty of Metallurgy and Energy Engineering Kunming University of Science and TechnologyKunming 650093China National and Local Joint Engineering Laboratory for Lithium-ion Batteries and materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceKunming University of Science and TechnologyKunming 650093China Faculty of materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China

Affected by cobalt(co)supply bottlenecks and high costs,co-free Ni-rich layered cathodes are considered the most promising option for economical and sustainable development of lithium-ion batteries(LIBs).Low-cost LiNi_(x)Al_(1-x)O_(2)(x≥0.9)cathode are rarely reported due to their chemo-mechanical instabilities and poor cycle ***,we employ a strategy of Mg/W Li/Ni dualsite co-doping LiNi_(0.9)Al_(0.1)O_(2)(named as LNA90)cathodes to enhance cycling stability by modifying the crystal structure and forming a center radially aligned *** Mg/W co-doped LiNi_(0.9)Al_(0.1)O_(2)cathode(named as LNAMW)exhibits high capacity retention of 94.9%at 1 c and 3.0-4.5 V after 100 cycles with 22.0%increase over the pristine cathode LNA90 and maintains the intact particle ***,the cycling performance of LNAMW cathode exceeds that of most reported Ni-rich cathodes(Ni mol%>80%).Our work offers a straightforward,efficient,and scalable strategy for the future design of cofree Ni-rich cathodes to facilitate the development of economical lithium-ion batteries.

关键词： co-free Ni-rich cathode dual-site co-doping microstructure LiNi_(0.9)Al_(0.1)O_(2) lithium-ion batteries

Hierarchical peony-like Feco-Nc with conductive network and highly active sites as efficient electrocatalyst for rechargeable Zn-air battery

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Nano Research 2020年第4期13卷 1090-1099页

作者： Yiyan Wang Anuj Kumar mang ma Yin Jia Yu Wang Ying Zhang Guoxin Zhang Xiaoming Sun Zifeng Yan State Key Laboratory of Heavy Oil Processing China University of Petroleum(East China)Qingdao 266580China Department of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China Department of chemistry Institute of Humanities and applied ScienceGLA UniversityMathura-281406India

carbon materials featuring hierarchical pores and atomically dispersed metal sites are promising catalysts for energy storage and conversion ***,we developed a facile strategy to construct functional carbon materials with a fluffy peony-like structure and dense binary Feco-Nx active sites(termed as f-Feco-cNT).By regulating the metal content in precursors,a three-dimensional(3D)interconnected conductive carbon nanotubes network was in-situ formed throughout the atomically dispersed Feco-Nc matrix during *** advantage of rich pore hierarchy and co-existence of highly active Feco-Nx sites and beneficial Feco alloy nanoparticles,the f-Feco-cNT material exhibited excellent bifunctional performance towards oxygen reduction reaction/oxygen evolution reactions(ORR/OER)with respect to the atomically dispersed Feco-Nc(SA-f-Feco-Nc)and commercial Pt/c+Ru02 mixture,surpassing the SA-f-Feco-Nc with a 20 mV higher ORR half-wave potential and a 100 mV lower OER overpotential(at 10.0 ma/cm^2).Remarkably,the f-Feco-cNT-assembled Zn-air battery(ZAB)possessed a maximum specific power of 195.8 mW/cm^2,excellent rate capability,and very good cycling stability at large current density of 20.0 ma/cm^*** work provides a facile and feasible synthetic strategy of constructing low-cost cathode materials with excellent comprehensive ZAB performance.

关键词： atom ically dispersed catalyst hierarchical structure carbon nanotube oxygen electrocatalyst rechargeable zinc-air battery

High catalytic activity for formaldehyde oxidation of an interconnected network structure composed of δ-MnO_(2) nanosheets and γ-MnOOH nanowires

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Advances in manufacturing 2020年第4期8卷 429-439页

作者： Ying Tao Rong Li Ai-Bin Huang Yi-Ning ma Shi-Dong Ji Ping Jin Hong-Jie Luo State Key Laboratory of High Performance ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050.People's Republic of China Institute for the conservation of culture Heritage Shanghai UniversityShanghai 200444.People's Republic of China University of chinese Academy of Sciences Beijing 100049People's Republic of China Department of criminal Science and Technology Jiangsu Police InstituteNanjing 210031People's Republic of China

Among the transition metal oxide catalysts,manganese oxides have great potential for formaldehyde(HcHO)oxidation at ambient temperature because of their high activity,nontoxicity,low cost,and polybasic *** this work,a MnO_(2)-based catalyst(M-MnO_(2))with an interconnected network structure was successfully synthesized by a one-step hydrothermal *** M-MnO_(2) catalyst was composed of the main catalytic agent,δ-MnO_(2) nanosheets,dispersed in a nonactive framework material of γ-MnOOH *** catalytic activity of M-MnO_(2) for HcHO oxidation at room temperature was much higher than that of the pure δ-MnO_(2) *** is attributed to the special interconnected network *** special interconnected network structure has high dispersion and specific surface area,which can provide more surface active oxygen species and higher surface hydroxyl groups to realize rapid decomposition of HcHO.

关键词： MnO_(2) Formaldehyde catalytic oxidation Hydrothermal synthesis

Atomic cu Sites Engineering Enables Efficient cO_(2)Electroreduction to Methane with High cH_(4)/c_(2)H_(4)Ratio

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Nano-Micro Letters 2023年第12期15卷 361-375页

作者： Minhan Li Fangzhou Zhang Min Kuang Yuanyuan ma Ting Liao Ziqi Sun Wei Luo Wan Jiang Jianping Yang Institute of Functional materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China college of materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China School of Mechanical Medical and Process EngineeringSchool of Chemistry and PhysicsQueensland University of Technology2 George StreetBrisbaneQLD 4001Australia

Electrochemical reduction of cO_(2)into high-value hydrocarbons and alcohols by using cu-based catalysts is a promising and attractive technology for cO_(2)capture and utilization,resulting from their high catalytic activity and *** mobility and accessibility of active sites in cubased catalysts significantly hinder the development of efficient cu-based catalysts for cO_(2)electrochemical reduction reaction(cO_(2)RR).Herein,a facile and effective strategy is developed to engineer accessible and structural stable cu sites by incorporating single atomic cu into the nitrogen cavities of the host graphitic carbon nitride(g-c_(3)N_(4))as the active sites for cO_(2)-to-cH_(4)conversion in cO_(2)*** regulating the coordination and density of cu sites in g-c_(3)N_(4),an optimal catalyst corresponding to a one cu atom in one nitrogen cavity reaches the highest cH_(4)Faraday efficiency of 49.04%and produces the products with a high cH_(4)/c_(2)H_(4)ratio over *** work provides the first experimental study on g-c_(3)N_(4)-supported single cu atom catalyst for efficient cH_(4)production from cO_(2)RR and suggests a principle in designing highly stable and selective high-efficiency cu-based catalysts for cO_(2)RR by engineering cu active sites in 2D materials with porous crystal structures.

关键词： cO_(2)RR cu single-atom catalyst g-c_(3)N_(4) Methane cH_(4)/c_(2)H_(4)ratio

In vitro 3D malignant melanoma model for the evaluation of hypericin-loaded oil-in-water microemulsion in photodynamic therapy

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Bio-Design and manufacturing 2022年第4期5卷 660-673页

作者： Hui Lma Wanlu Li Mian Wang Laudemir c.Varanda Janice R.Perussi Y.Shrike Zhang Emanuel carrilho Instituto de Química de São carlos Universidade de São PauloUSPAv.Trabalhador São-carlenseSão CarlosSP 13566-590Brazil Instituto Nacional de ciência e Tecnologia de Bioanalítica INCTBioCampinasSP 13083-970Brazil Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolCambridgeMA 02139USA

Advances in biomimetic three-dimensional(3D) melanoma models have brought new prospects of drug screening and disease modeling, since their physiological relevancy for recapitulating in vivo tumor architectures is more accurate than traditional two-dimensional(2D) cell culture. Gelatin methacryloyl(Gelma) is widely used as a tissue-engineered scaffold hydrogel for 3D cell culture. In the present study, an in vitro 3D malignant melanoma model based on Gel ma was fabricated to evaluate the efficiency of hypericin(Hy)-loaded microemulsion(ME) in photodynamic therapy against melanoma. The ME was produced by the spontaneous emulsification method to enhance the bioavailability of Hy at tumor sites. Hy-loaded MEs were applied to a 3D malignant melanoma model made using 6% Gel ma and the co-culture of B16F10 and Balb/c 3T3 cells,followed by crosslinking using violet light(403 nm). The observation revealed excellent cell viability and the presence of F-actin cytoskeleton network. Hy-loaded MEs exhibited higher phototoxicity and cell accumulation(about threefold) than free Hy, and the cells cultured in the 3D system displayed lower susceptibility(about 2.5-fold) than those in 2D *** findings indicate that the developed MEs are potential delivery carriers for Hy;furthermore, Gel ma hydrogel-based modeling in polydimethylsiloxane(PDMS) molds is a user-friendly and cost-effective in vitro platform to investigate drug penetration and provide a basis for evaluating nanocarrier efficiency for skin cancer and other skin-related diseases.

关键词： malignant melanoma 3D cell culture Hypericin Microemulsion Photodynamic therapy