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| 1 | Investigation of free amino acid, total phenolics,antioxidant activity and purine alkaloids to assess the health properties of non-Camellia tea显示文摘To find novel functional beverages from folk teas, 33 species of frequently used non-Camellia tea(plants other than Camellia) were collected and compared with Camellia tea(green tea, pu-erh tea and black tea) for the first time. Data are reported here on the quantities of 20 free amino acids(FAAs) and three purine alkaloids(measured by UHPLC), total polyphenols(measured by Folin-Ciocalteu assay), and antioxidant activity(DPPH). The total amounts of FAAs in non-Camellia tea(0.62–18.99 mg/g) are generally less than that of Camellia tea(16.55–24.99 mg/g). However, for certain FAAs, the quantities were much higher in some non-Camellia teas, such as γ-aminobutyric acid in teas from Ampelopsis grossedentata, Isodon serra and Hibiscus sabdariffa. Interestingly, theanine was detected in tea from Potentilla fruticosa(1.16±0.81 mg/g). Furthermore, the content of polyphenols in teas from A. grossedentata, Acer tataricum subsp. ginnala are significantly higher than those from Camellia tea;teas from I. serra, Pistacia chinensis and A. tataricum subsp. ginnala have remarkable antioxidant activities similar to the activities from green tea(44.23 μg/m L). Purine alkaloids(caffeine, theobromine and theophylline) were not detected in non-Camellia teas. The investigation suggest some non-Camellia teas may be great functional natural products with potential for prevention of chronic diseases and aging,by providing with abundant polyphenols, antioxidants and specific FAAs. | Wu Bi Chunnian He Yunyun Ma Jie Shen Linghua Harris Zhang Yong Peng Peigen Xiao | 2016 | Acta Pharmaceutica Sinica B2016，6，2： | 11 |
| 2 | Comparative Genome Analysis of Scutellaria baicalensis and Scutellaria barbata Reveals the Evolution of Active Flavonoid Biosynthesis显示文摘Scutellaria baicalensis(S.baicalensis)and Scutellaria barbata(S.barbata)are common medicinal plants of the Lamiaceae family.Both produce specific flavonoid compounds,including baicalein,scutellarein,norwogonin,and wogonin,as well as their glycosides,which exhibit antioxidant and antitumor activities.Here,we report chromosome-level genome assemblies of S.baicalensis and S.barbata with quantitative chromosomal variation(2 n=18 and 2 n=26,respectively).The divergence of S.baicalensis and S.barbata occurred far earlier than previously reported,and a whole-genome duplication(WGD)event was identified.The insertion of long terminal repeat elements after speciation might be responsible for the observed chromosomal expansion and rearrangement.Comparative genome analysis of the congeneric species revealed the species-specific evolution of chrysin and apigenin biosynthetic genes,such as the S.baicalensis-specific tandem duplication of genes encoding phenylalanine ammonia lyase and chalcone synthase,and the S.barbata-specific duplication of genes encoding 4-Co A ligase.In addition,the paralogous duplication,colinearity,and expression diversity of CYP82 D subfamily members revealed the functional divergence of genes encoding flavone hydroxylase between S.baicalensis and S.barbata.Analyzing these Scutellaria genomes reveals the common and species-specific evolution of flavone biosynthetic genes.Thus,these findings would facilitate the development of molecular breeding and studies of biosynthesis and regulation of bioactive compounds. | Zhichao Xu Ranran Gao Xiangdong Pu Rong Xu Jiyong Wang Sihao Zheng Yan Zeng Jun Chen Chunnian He Jingyuan Song | 2020 | Genomics, Proteomics & Bioinformatics2020，18，3： | 10 |
| 3 | A bottom-up strategy toward metal nano-particles modified graphene nanoplates for fabricating aluminum matrix composites and interface study显示文摘To synthesize graphene economically and efficiently,as well as to improve the interface bonding between graphene and metal and to recede the aggregation issue of graphene,in this work,an easy and scalable bottom-up strategy for the mass production of metal nanoparticles modified graphene nanoplates(GNPs)was proposed.Cu nanoparticles modified GNPs(Cu-GNPs)and Ni nanoparticles modified GNPs(Ni-GNPs)were fabricated through this method,and then compounded with Al via ball milling technique.The asobtained Ni-GNPs/Al composite showed simultaneously improved strength and toughness compared with unreinforced Al,while the Cu-GNPs/Al composite presented a greater strengthening effect.The microstructure and interface of the two composites were carefully characterized and investigated to reveal the difference.First principle study was also adopted to explore the binding energy of different interface structures.This study could provide new insights into the fabrication of GNPs and the control of interface in GNPs/Al composites. | Tielong Han Enzuo Liu Jiajun Li Naiqin Zhao Chunnian He | 2020 | Journal of Materials Science & Technology2020，42，11： | 8 |
| 4 | Effect of Ni,Fe and Fe-Ni alloy catalysts on the synthesis of metal contained carbon nano-onions and studies of their electrochemical hydrogen storage properties显示文摘Three types of carbon nano-onions(CNOs) including Ni@CNOs.Fe_3C@CNOs and Fe_(0.64)Ni_(0.36)@CNOs nanoparticles have been synthesized by catalytic decomposition of methane at 850 ℃ using nickel,iron and iron-nickel alloy catalysts.Comparative and systematic studies have been carried out on the morphology,structural characteristics and graphitic crystallinity of these CNOs products.Furthermore,the electrochemical hydrogen storage properties of three types of CNOs have been investigated.Measurements show that the Ni@CNOs have the highest discharge capacity of 387.2 mAh/g,coiTesponding to a hydrogen storage of 1.42%.This comparison study shows the advantages of each catalyst in the growth of CNOs.enabling the controllable synthesis and tuning the properties of CNOs by mediating different metals and their alloy for using in the fuel cell system. | Chenguang Zhang Jiajun Li Chunsheng Shi Chunnian He Enzuo Liu Naiqin Zhao | 2014 | Journal of Energy Chemistry2014，23，3： | 5 |
| 5 | Fabrication of Graphene Nanoplates Modified with Nickel Nanoparticles for Reinforcing Copper Matrix Composites显示文摘In order to improve the interface wettability as well as the interfacial bonding between graphene and copper matrix,in this work,graphene nanoplates modified with nickel nanoparticles(Ni-GNPs)were synthesized using a one-step method based on spray-drying and chemical vapor deposition.Thereafter,0.33 wt%Ni-GNPs were introduced into copper matrix composite by the molecular-level mixing method,leading to further enhancement of 90%in yield strength.This is attributed to the presence of Ni-GNPs,which provided high resistance to matrix against deformation.In addition,with the modification of nickel at the interface,the wettability and interfacial bonding between graphene nanoplates and copper matrix were improved,which enhanced the load transfer then.Furthermore,the microstructures and strengthening mechanisms were investigated and discus sed meanwhile. | Tielong Han Jiajun Li Naiqin Zhao Chunnian He | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，5： | 3 |
| 6 | Simultaneously optimizing pore morphology and enhancing mechanical properties of Al-Si alloy composite foams by graphene nanosheets显示文摘The integrity and regularity of pore morphology play an important role in determining the mechanical properties of the metallic foam materials.The conventional methods on refining pore morphology are mainly focused on the optimization of fabrication techniques,however,they are usually inconvenient and complicated.Recently,incorporating nano reinforcement is considered to be a suitable way to fabricate metallic composite foams accompanied by optimized pore morphology and enhanced mechanical properties.In this work,through a facile and rapid powder metallurgy foaming method,the aluminum-silicon(Al-Si)alloy composite foams reinforced by graphene nanosheets(GNSs)are successfully fabricated.The microstructure analyses reveal that,for the Al-Si alloy foams incorporating the GNSs(GNSs/Al-Si composite foams),the pore size is transformed to be smaller,the pore size distributions become more homogeneous and the pore shape is also refined to a regular and roundish state.Meanwhile,the shape of Si precipitates is found transforming from an irregular long strip(length of~20μm,width of~5μm)to a fine particle state(diameter of~5μm).Moreover,the compressive testing results show that,the 0.4wt%GNSs/Al-Si composite foams own the optimal compression stress of 11.7±0.5 MPa,plateau stress of 10.0±1.0 MPa and energy absorption capacity of 6.8±0.7 MJ/m^(3),which have improvement of 58.1%,53.8%and 51.1%in comparison with the Al-Si alloy foams counterpart,respectively.The present findings may pave a new way for developing new generation of metallic composite foams that with stable microstructure and excellent mechanical performance. | Weiting Li Xudong Yang Kunming Yang Chunnian He Junwei Sha Chunsheng Shi Yunhui Mei Jiajun Li Naiqin Zhao | 2022 | Journal of Materials Science & Technology2022，，6： | 3 |
| 7 | Copper-Coated Graphene Nanoplatelets-Reinforced Al–Si Alloy Matrix Composites Fabricated by Stir Casting Method显示文摘In this study,Cu nanoparticles-coated graphene nanoplatelets(Cu-NPs@GNPs)were synthesized by a simple in situ method with the assistance of Na Cl templates and used for reinforcing Al–10 Si composites through stir casting process.The experimental results showed that the coating of Cu-NPs on the GNPs could compromise the density mismatch between GNPs and metal matrix and eff ectively hinder the float of GNPs during stirring.The reaction of Cu-NPs and Al matrix could protect the structural integrity of GNPs as well as improve the interfacial wettability between GNPs and the matrix,thus promoting the uniform dispersion of GNPs in the composites.As a result,the as-prepared 0.5 wt%Cu-NPs@GNPs/Al–10 Si composite exhibited a tensile strength of 251 MPa(45%higher than the Al–10 Si)with a total elongation of 15%.The strengthening eff ects were mainly attributed to the following three reasons:Firstly,the Cu-NPs coating improved the interfacial bonding between GNPs and Al matrix which promoted the load transfer from the matrix to the GNPs.Secondly,the nanoscale Al 2 Cu formed by the reaction of Cu-NPs and Al matrix played a role in precipitation strengthening.Thirdly,GNPs refined the silicon phases and improved the monolithic performances of the composites. | Xiaoqi Han Lizhuang Yang Naiqin Zhao Chunnian He | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，1： | 2 |
| 8 | Car- bon onion growth enhanced by nitrogen incorporation 显示文摘 | He Chunnian Zhao Naiqin Shi Chunsheng | 2006 | Scripta Materialia2006，54，10： | 1 |
| 9 | Low-tem- perature synthesis of carbon onions by chemical vapor deposition using nickel catalyst supported on aluminum 显示文摘 | He Chunnian Zhao Naiqin Du Xiwen | 2006 | Scripta Materialia2006，54，4： | 1 |
| 10 | Fabrication and growth mechanism of carbon nanotubes by catalytic chemical vapor deposition显示文摘 | Naiqin Zhao Chunnian He | 2006 | MaterialLetters2006，60，： | 1 |
| 11 | Self-anchored catalysts for substrate-free synthesis of metal-encapsulated carbon nano-onions and study of their magnetic properties显示文摘我们表明包含阶段分离为碳 nanostructures 的没有底层的合成产生的 Fe-Ni 合金 nanosheet 的新奇自我抛锚的催化剂结构的合成。快 Fourier 变换分析被执行以便在减小和化学蒸汽免职(CVD ) 期间调查阶段和合金 nanosheet 的结构的进化生长。-Fe-Ni (Fe 0.64 Ni 0.36) 和 -Fe-Ni (铁镍合金) 分阶段执行在 NiFe 2 O 4 nanosheet 催化剂先锋在 H 2 减小期间,在一个 -Fe-Ni 矩阵上形成 selfanchored 单音分散 -Fe-Ni nanocrystals。Fe-Ni 合金 nanosheet 为种包含金属的碳 nano 洋葱(CNO ) 催化剂用作,并且作为对抛锚的支持这些 preformed nanoparticles,没有为 CVD 生长的另外的底层的要求的让步的单音分散催化剂 nanoparticles。这合成能够减轻结合并且 Ostwald 没有另外的底层的帮助,成熟。这结构允许尽管有聚集的制服大小的 CNO 的生长,弄碎,并且合金表叠。这研究在大规模向碳 nanostructures 的没有底层的合成由阶段分离为新奇催化剂结构提供一个有希望的图案。最后,铁磁性的 Fe 0.64 Ni 0.36@CNOs 粒子在磁性的存储和水纯化演示他们的应用程序,,无毒的水处理材料。 | Chenguang Zhang Jiajun Li Chunsheng Shi Chunnian He Enzuo Liu Naiqin Zhao | 2016 | Nano Research2016，9，4： | 1 |
| 12 | Si-Assisted Solidification Path and Microstructure Control of 7075 Aluminum Alloy with Improved Mechanical Properties by Selective Laser Melting显示文摘The construction and application of traditional high-strength 7075 aluminum alloy(Al7075) through selective laser melting(SLM) are currently restricted by the serious hot cracking phenomenon. To address this critical issue, in this study, Si is employed to assist the SLM printing of high-strength Al7075. The laser energy density during SLM is optimized, and the eff ects of Si element on solidification path, relative density, microstructure and mechanical properties of Al7075 alloy are studied systematically. With the modified solidification path, laser energy density, and the dense microstructure with refined grain size and semi-continuous precipitates network at grain boundaries, which consists of fine Si, β-MgSi, Q-phase and θ-AlCu, the hot cracking phenomenon and mechanical properties are eff ectively improved. As a result, the tensile strength of the SLM-processed Si-modified Al7075 can reach 486 ± 3 MPa, with a high relative density of ~ 99.4%, a yield strength of 291 ± 8 MPa, fracture elongation of(6.4 ± 0.4)% and hardness of 162 ± 2(HV) at the laser energy density of 112.5 J/mm~3. The main strengthening mechanism with Si modification is demonstrated to be the synergetic enhancement of grain refinement, solution strengthening, load transfer, and dislocation strengthening. This work will inspire more new design of high-strength alloys through SLM. | Junwei Sha Meixian Li Lizhuang Yang Xudong Rong Bowen Pu Dongdong Zhao Simi Sui Xiang Zhang Chunnian He Jianglin Lan Naiqin Zhao | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，9： | 1 |
| 13 | Synthesis of carbon nanostructures with different morphologies by CVD of methane显示文摘 | Naiqin Zhao Qingran Cui Chunnian He | 2007 | Materials Science and Engineering A2007，，： | 1 |
| 14 | Synthesis of hollow carbon nano-onions and their use for electrochemical hydrogen storage显示文摘 | Chenguang Zhang Jiajun Li Enzuo Liu Chunnian He Chunsheng Shi Xiwen Du Robert H. Hauge Naiqin Zhao | 2012 | Carbon2012，，10： | 1 |
| 15 | Effect of amorphous FePOcoating on structure and electrochemical performance显示文摘 | Wang Zhiyuan Liu Enzuo He Chunnian | 2013 | Journal of Power Sources2013，236，： | 1 |
| 16 | An Approach to Obtaining Homogeneously Dispersed Carbon Nanotubes in A1 Powders for Preparing Reinforced A1-Matrix Composites显示文摘 | Chunnian He Naiqin Zhao Chunsheng Shi | 2007 | Advanced Materials2007，19，8： | 1 |
| 17 | Effect of amorphous FePO4coating on structure and electrochemical per- formanee 显示文摘 | Zhiyuan Wang Enzuo Liu Chunnian He | 2013 | Journal of Power Sources2013，236，： | 1 |
| 18 | Carbon nanotubes and onions from methane decomposition using Ni/Al catalysts显示文摘 | He Chunnian Zhao Naiqin Shi Chunsheng | 2006 | Material Chemistry and Physics2006，97，1： | 1 |
| 19 | Preparation of reduced graphene oxide/Fe 3 O 4 nanocomposite and its microwave electromagnetic properties显示文摘 | Erlong Ma Jiajun Li Naiqin Zhao Enzuo Liu Chunnian He Chunsheng Shi | 2013 | Materials Letters2013，，： | 1 |
| 20 | Effect of GNPs on microstructures and mechanical properties of GNPs/Al-Cu composites with different heat treatment status显示文摘Microstructural and mechanical behavior of heat treatable Al-4.6Cu binary alloy reinforced with graphene nanoplates(GNPs) in different heat treatment status were investigated in this paper.The addition of GNPs significantly enhanced the yield strength and tensile strength of Al-Cu alloy regardless of the heattreatment conditions.It was also found that GNPs accelerated the formation of precipitates,leading to a greatly shortened aging time for GNPs/Al-4.6Cu composite to reach the peak hardness.However,aging treatment enhanced the strength of GNPs/Al-Cu composite very little,which could be explained by the interaction between GNPs,precipitates and dislocations.This work inspires us that the heat treatment process of aluminum alloy matrix composites should be designed independently with the matrix in quest of an optimum performance. | Tielong Han Fucheng Wang Jiajun Li Chunnian He Naiqin Zhao | 2021 | Journal of Materials Science & Technology2021，，33： | 1 |
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