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| 1 | Geochemical and Pb-Sr-Nd isotopic compositions of Indosinian granitoids from the Bikou block,northwest of the Yangtze plate:Constraints on petrogenesis,nature of deep crust and geodynamics显示文摘This paper reports geochemical and Pb-Sr-Nd isotopic compositions of the Indosinian Yangba (215 Ma),Nanyili (225 Ma) and Mopi granitoids from the Bikou block of the northwestern margin of the Yangtze plate. These granitoids are enriched in Al (Al2O3:14.56%―16.48%) and Sr (352 μg/g―1047 μg/g),and depleted in Y (<16 μg/g) and HREE (e.g. Yb<1.61 μg/g),resulting in high Sr/Y (36.3―150) and (La/Yb)N (7.8―36.3) ratios and strongly fractionationed REE patterns. The Indosinian granotoids show initial Sr isotopic ratios (ISr) from 0.70419 to 70752,εNd(t) values from-3.1 to -8.5,and initial Pb isotopic ratios 206Pb/204Pb=17.891-18.250,207Pb/204Pb=15.494-15.575,and 208Pb/204Pb=37.788-38.335. Their geochemi-cal signatures indicate that the granitoids are adakitic. However,they are distinct from some adakites,generated by partial melting of subducted oceanic slab and/or underplated basaltic lower crust,be-cause they have high K (K2O: 1.49%―3.84%) and evolved Nd isotopic compositions,with older Nd iso-topic model ages (TDM=1.06―1.83 Ga). Geochemical and Sr-Nd isotopic compositions suggest that the magmas of the Insoninian adakitic rocks in the Bikou block were derived from partial melting of thick-ened basaltic lower crust. Combined with regional analyses,a lithospheric delamination model after collision between the North China and South China plates can account for the Indosinian adakitic magma generation. On the other hand,based on the Pb-Sr-Nd isotopic probing to the magma sources of the adakitic rocks,it is suggested that there is an unexposed continent-type basement under the exposed Bikou Group volcanic rocks. This can constrain on the Bikou Group volcanic rocks not to be MORB-or OIB-type. | ZHANG HongFei XIAO Long ZHANG Li YUAN HongLin JIN LanLan | 2007 | Science China Earth Sciences2007，50，7： | 38 |
| 2 | H6 Non-isolated Full Bridge Grid-connected PV Inverters With Low Leakage Currents显示文摘为满足非隔离光伏并网发电系统对共模漏电流的限制,提出一种六开关逆变器拓朴(H6拓扑)。所提出的H6拓扑在功率传输模态时,进网电流半个工频周期流过3支开关管,而另半个工频周期流过2支开关管,故相对于H5拓扑,降低了通态损耗,有利于热应力均衡,且仍满足续流阶段光伏电池输出端与电网脱离的要求。详细分析拓扑的工作原理,并推论给出H6非隔离光伏并网逆变器的其它3种拓扑结构;比较分析了H5拓扑、Heric拓扑和H6拓扑的损耗和成本。通过1kW通用样机平台对比验证了上述3种拓扑的效率和共模特性。实验结果表明,H6拓扑的变换效率高于H5拓扑、但略低于Heric拓扑,共模特性优于Heric拓扑、但略劣于H5拓扑。 | ZHANG Li SUN Kai FENG Lanlan XING Yan XU Ming | 2012 | 中国电机工程学报2012，32，15： | 29 |
| 3 | GC-MS, GC-O and OAV analyses of key aroma compounds in Jiaozi Steamed Bread显示文摘Jiaozi Steamed Bread(JSB)has a unique aroma as a traditional staple food in China.The volatile compounds in JSBwere extracted by simultaneous distillation and extraction(SDE)and headspace solid-phasemicroextraction(HS-SPME).These volatile substances were analyzed by gas chromatography-mass spectrometry(GC-MS)and gas chromatographyolfactometry-mass spectrometry(GC-O-MS).The results demonstrated that 61 volatile compounds were identified totally in samples,of which 15 were confirmed as potent aroma compounds with odor active values(OAVs)>1.The 15 potent aroma compounds were ethanol,1-butanol,1-pentanol,1-hexanol,heptanol,1-octen-3-ol,3-methyl-1-butanol,hexanal,heptanal,nonanal,(E)-2-heptenal,benzaldehyde,(E,E)-2,4-decadienal,2-pentylfuran and naphthalene.The SDEmethod had better linearity with coefficients of determination(R2)equal to or higher than 0.9991.Furthermore,the SDE method also achieved lower sensitivity and better repeatability and recovery than HS-SPME.This work provides reference method and parameters for future research on the flavor of JSB for commercial products. | Yuanhui Wang Jingwen Zhao Fei Xu Xiaoyun Wu Wenxuan Hu Yongfeng Chang Lanlan Zhang Jie Chen Changhong Liu | 2020 | Grain & Oil Science and Technology2020，3，1： | 17 |
| 4 | Effects of metabolizable energy and crude protein levels on laying performance,egg quality and serum biochemical indices of Fengda-1 layers显示文摘This study was conducted to investigate the effects of dietary ME and CP levels on laying performance, egg quality and serum biochemical indices of Fengda-1 layers. In a 2 × 3 factorial arrangement, 2,400 Fengda-1 layers(32 wk of age) were randomly assigned to 6 experimental diets with 2,650 and 2,750 kcal of ME/kg of diet, each containing 14.50%, 15.00% and 15.50% CP, respectively. Each dietary treatment was replicated 5 times, and feed and water were provided ad libitum. The trial lasted for 10 wk, including a2-week acclimation period and an 8-week experimental period. Our results showed that ADFI decreased as the ME level of diet increased from 2,650 to 2,750 kcal/kg(P< 0.05). Layers fed diets with 2,750 kcal/kg ME exhibited higher mortality than those fed with 2,650 kcal/kg ME(P < 0.05). Birds fed with 14.50% and15.00% CP had higher egg production(EP) and egg mass(EM) than those fed with 15.50% CP(P < 0.05).Yolk color increased as the ME level of the diet increased from 2,650 to 2,750 kcal/kg, however, the eggshell thickness decreased(P < 0.05). Serum concentrations of uric acid and triglyceride in layers fed diets with 2,750 kcal/kg ME were higher than those fed diets with 2,650 kcal/kg ME(P < 0.05). There was no significant interaction between ME and CP on laying performance, egg quality, or serum biochemical indices(P > 0.05). Based on the data under the experimental conditions, the optimal dietary ME and CP levels of Fengda-1 layers are 2,650 kcal/kg and 15.00%(33 to 41 wk of age). | Yang Ding Xingchen Bu Nannan Zhang Lanlan Li Xiaoting Zou | 2016 | Animal Nutrition2016，，2： | 11 |
| 5 | Performance Evaluation of Two-Vector-Based Model Predictive Current Control of PMSM Drives显示文摘Conventional model predictive current control(MPCC)applies only one vector during one control period,which produces large torque and flux ripples and high current harmonics in permanent magnet synchronous motor(PMSM)drives.Recently MPCC with duty cycle control has been proposed to improve the steady state performance by applying one non-zero vector and one null vector during one control period.However,the prior method requires lots of calculations and predictions to find the optimal voltage vectors and calculate their respective duration.Different from prior enumeration-based MPCC,this paper proposes an efficient two-vector MPCC by applying two arbitrary voltage vectors during one control period.The reference voltage vector is firstly calculated based on the principle of deadbeat current control.Two optimal vectors and their duration are then obtained in a very efficient way,which does not require the calculation of current slopes in prior MPCC methods.The proposed method is compared to the state-of-the-art predictive control methods,including conventional MPCC,MPCC with duty cycle control,deadbeat control with space vector modulation(SVM)and modulated model predictive control(M2PC).Both simulation and experimental results prove that the proposed method achieves better steady state performance than conventional MPCC with or without duty cycle and the dynamic response is not degraded.Under the condition of insufficient dc bus voltage,the proposed method outperforms deadbeat control and M2PC by presenting even higher speed range and less torque ripples. | Yongchang Zhang Lanlan Huang Donglin Xu Jiali Liu Jialin Jin | 2018 | Chinese Journal of Electrical Engineering2018，4，2： | 9 |
| 6 | Phase Evolution of Holocene Paleoenvironmental Changes in the Southern Yellow Sea: Benthic Foraminiferal Evidence from Core CO2显示文摘Assemblages of benthic foraminifera in a sediment core(C02)near the western margin of the southern Yellow Sea Mud were studied to decipher the phase evolution of Holocene paleoenvironmental changes associated with the Holocene marine transgression.It appears that during the early Holocene(11.2 10.1 kyr BP),the faunal was dominated by low salinity and shallow water species Cribrononion subincertum,Buccella frigida and Ammonia beccarii,reflecting a near coast depositional environment.A rapid increase of the relative abundance of Ammonia compressiuscula between 10.1 9.3 kyr BP indicates that the sea level rose rapidly during that time period.From 9.3 7.7 kyr BP,the benthic foraminiferal assemblage was dominated by high percentage of A.compressiscula,suggesting that the sea level was relatively stable.An obvious transition of benthic foraminifera,from the A.compressiuscula-dominated assemblage to an Ammonia ketienziensis-dominated assemblage,occurred between 7.7 6.2 kyr BP,possibly corresponding to a second sea level rapid rise period in the Yellow Sea during the Holocene.This transition may correspond to the gradually strengthened Yellow Sea warm current(YSWC)and finally is established the modern-type circulation in the Yellow Sea.It may also mark the formation of the Yellow Sea cold bottom water(YSCBW)during that period.Since then,the benthic foraminiferal assemblage based on core C02 was dominated by typical YSCBW species,A.ketienziensis,Astrononion italicum and Hanzawaia nipponica,at 6.2 4 kyr BP.A non-deposition period occurred since 4 kyr BP,which possibly related to the hydrology changes caused by the East Asia monsoon.The two obvious benthic foraminiferal transitions recorded in core C02 during the early and middle Holocene provide evidence that the Yellow Sea has undergone a two-phase rapid sea level rise during the Holocene marine transgression. | FANG Li XIANG Rong ZHAO Meixun ZHOU Liping LIU Jianguo ZHANG Lanlan | 2013 | Journal of Ocean University of China2013，12，4： | 8 |
| 7 | Ultrahigh-Q silicon racetrack resonators显示文摘An ultrahigh-Q silicon racetrack resonator is proposed and demonstrated with uniform multimode silicon photonic waveguides.It consists of two multimode straight waveguides connected by two multimode waveguide bends(MWBs).In particular,the MWBs are based on modified Euler curves,and a bent directional coupler is used to achieve the selective mode coupling for the fundamental mode and not exciting the higher-order mode in the racetrack.In this way,the fundamental mode is excited and propagates in the multimode racetrack resonator with ultralow loss and low intermode coupling.Meanwhile,it helps achieve a compact 180°bend to make a compact resonator with a maximized free spectral range(FSR).In this paper,for the chosen 1.6μm wide silicon photonic waveguide,the effective radius Reffof the designed 180°bend is as small as 29μm.The corresponding FSR is about 0.9 nm when choosing 260μm long straight waveguides in the racetrack.The present high-Q resonator is realized with a simple standard single-etching process provided by a multiproject wafer foundry.The fabricated device,which has a measured intrinsic Q-factor as high as 2.3×10~6,is the smallest silicon resonator with a>106Q-factor. | LONG ZHANG LANLAN JIE MING ZHANG YI WANG YIWEI XIE YAOCHENG SHI DAOXIN DAI | 2020 | Photonics Research2020，8，5： | 7 |
| 8 | Express,on of the novel adipokine ClqTNF-related protein 4 (CTRP4) suppresses colitis and colitis- associated colorectal cancer in mice显示文摘 | Yang Luo Xiaotong Wu Zhuang Ma Weifeng Tan Lanlan Wang Daxiang Na Guoying Zhang Ang Yin He Huang Dan Xia Yingmei Zhang Xueying Shi Lu Wang | 2016 | Cellular & Molecular Immunology2016，13，5： | 6 |
| 9 | Distribution of living radiolarians in spring in the South China Sea and its responses to environmental factors显示文摘Using a planktonic net(62-?m mesh) and a Rose-Bengal staining method, we studied the spatial distribution of living radiolarians in spring along two sections of the South China Sea(SCS) in spring and discussed the responses of living radiolarian distribution to tropical environmental factors. Generally, the highest abundance of living radiolarians occurred at the depth range of 25–75 m, where the chlorophyll-a maximum and the highest primary productivity were. In contrast, the maximum living abundance occurred in the top 25 m in cold eddies in the open seas and the abundance decreased with depth. We found that the inhibition effect of changing salinity(due to runoffs) on living radiolarians was much stronger than the promotion effect of mesoscale cold eddies. We observed that large variation of temperature was unfavorable for living radiolarians. The dominant species composition consisted of tropical-subtropical warm species. We identified some indicator species for tropical environments. Living Didymocyrtis tetrathalamus tetrathalamus could be an indicator for tropical surface water or mixed-layer water, and even for tropical oligotrophic water. Living Tetrapyle octacantha could be used to indicate tropical thermocline and eutrophic environment. Living Acanthodesmia vinculata could indicate tropical surface and subsurface waters. T. octacantha and A. vinculata should only be used as indicators for upwelling in the open seas, i.e., far away from river mouths. Living Siphonosphaera polysiphonia preferred to form colonies, which might be related to the effect of warm eddies. Living Cyrtopera laguncula and living Cornutella profunda occurred in the tropical upper layer, even in the surface layer, which suggests that they should not be used as indicators for intermediate and deep waters. | HU WeiFen ZHANG LanLan CHEN MuHong ZENG LiLi ZHOU WeiHua XIANG Rong ZHANG Qiang LIU ShiHao | 2015 | Science China Earth Sciences2015，58，2： | 4 |
| 10 | Magnetic granulometry of recent sediments from the Huguang Maar and its implication for provenience显示文摘To understand the origin and its climatic implications of the Huguang Maar sediments, we conducted laser grain size analysis and rock mangtic measurement for the recent deposits from the Huguang Maar and for the volcanic rocks of the caldera for comparison. The grain size distributions are dominated by clayey silts for both the bulk sediments and magnetic separates. Acquisition of isothermal remanent magnetization (IRM) and thermal demagnetization of IRM suggest (titano) magnetite as the dominating magnetic mineral in the sediments; high coercivity minerals are not detected. Therefore, the ratio of the susceptibility of anhysteretic remanent magnetization (kARM) to the weak field magnetic susceptibility (k), kARM/k can be used to estimate the grain size of magnetite. The sediments and volcanic rocks yield values of 13.7 and 11.8 for the kARM/k, respectively, corresponding to grain size values of ~0.03 μm and ~0.05 μm. The magnetic granulometry of lake sediments is distinctive from one of the Chinese loess, in which published data suggest a value of 6.0 for kARM/k, and grain size of ~0.1 μm, but is akin to the nearby volcanic rocks. Although a Loess Plateau source of the lake sediments cannot be fully ruled out, the catchment is most probably the main source. We explain the slightly finer magnetite grain size in sediments than in the volcanic rocks as being disintegrated of particles during erosion and transportation. We conclude that there is no evidence for aeolian input of the Loess Plateau dusts into the Huguang Maar, and the relationship between magnetic parameters of the lake sediments and winter monsoon intensity is probably more complicated than previously thought. | HAN YuLin TAN XiaoDong CHEN Zhong XIANG Rong ZHANG LanLan | 2010 | Chinese Science Bulletin2010，55，4： | 4 |
| 11 | Introduction of pokeweed antiviral protein cDNA into Brassica napus and acquisition of transgenic plants resistant to viruses显示文摘Using cotyledonary petioles as explants, the PAP cDNA controlled by wound-in-ducible promoter has been introduced into Brassica napus by coculture with Agrobacterium tumefaciens and laser microbeam puncture respectively. Regenerated plants resistant to gen-tamycin have been selected out. PCR amplification and Southern blotting analysis indicated that PAP cDNA together with wound-inducible promoter had been integrated into Brassica genome with transformation frequencies of 2.0% and 1.7% for two transformation methods respectively. The test of virus challenge showed that these transgenic Brassica plants were resistant in different degrees to mechanically inoculated TuMV. | ZHANG Haiyan , TIAN Yingchuan , ZHOU Yihua , DANG Benyuan LAN Haiyan , SONG Guiying , WANG Lanlan , LIU Guizhen , ZHANG Lihua and CHEN ZhenghuaInstitute of Genetics , Chinese Academy of Sciences , Beijing 100101, China Institute of Microbiology , Chinese Academy of Sciences , Beijing 100080, China | 1999 | Chinese Science Bulletin1999，44，8： | 3 |
| 12 | A predicted NEDD8 conjugating enzyme gene identified as a Capsicum candidate Rf gene using bulk segregant RNA sequencing显示文摘Cytoplasmic male sterility(CMS)is an important tool for producing F1 hybrids,which can exhibit heterosis.The companion system,restorer-of-fertility(Rf),is poorly understood at the molecular level and would be valuable in producing restorer lines for hybrid seed production.The identity of the Rf gene in Capsicum(pepper)is currently unclear.In this study,using bulked segregant RNA sequencing(BSR-seq),a strong candidate Rf gene,Capana06g002866,which is annotated as a NEDD8 conjugating enzyme E2,was identified.Capana06g002866 has an ORF of 555 bp in length encoding 184 amino acids;it can be cloned from F1 plants from the hybridization of the CMS line 8A and restorer line R1 but is not found in CMS line 8A.With qRT-PCR validation,Capana06g002866 was found to be upregulated in restorer accessions compared to sterile accessions.The relative expression in flower buds increased with the developmental stage in F1 plants,while the expression was very low in all flower bud stages of the CMS lines.These results provide new insights into the Rf gene in pepper and will be useful for other crops utilizing the CMS system. | Bingqiang Wei Paul W.Bosland Zhenghai Zhang Yongfu Wang Gaoyuan Zhang Lanlan Wang Jihua Yu | 2020 | Horticulture Research2020，7，1： | 3 |
| 13 | Radiolarian biostratigraphy in the Southern Bering Sea since Pliocene显示文摘Detailed radiolarian biostratigraphy in the Plio-Pleistocene was analyzed by using samples from IODP Site U1340 that was drilled to a core depth of 604 m in the southern Bering Sea.A total of 227 species belonging to 102 genera were identified.Based on the distributions of the radiolarian index species at Site U1340,five radiolarian zones since the Pliocene were established in the southern Bering Sea for the first time,and 25 radiolarian bioevents were recognized.Their ages were estimated on the basis of the age-depth plot that was constructed by the synthetical datum of the effective biostratigraphic and magnetostratigraphic events.The radiolarian zones at Site U1340 were systematically compared with those in its adjacent regions since the late Early Pliocene,which further improved and interpreted the biostratigraphic datum as well as their correlations in the middle-high latitude of the North Pacific.In addition,the comparative results of radiolarian zones show that Botryostrobus aquilonaris Zone emended in this paper is equivalent to the upper part of the same zone defined by Hays,1970,and Druppatractus irregularis-Dorydruppa bensoni Zone as well as Spongodiscus sp.Zone,newly proposed in this paper,are well correlated with Cycladophora sakaii Zone and Stylatractus universus Zone in the subarctic North Pacific,respectively. | ZHANG Qiang CHEN MuHong ZHANG LanLan WANG RuJian XIANG Rong HU WeiFen | 2014 | Science China Earth Sciences2014，57，4： | 3 |
| 14 | Radiolarian biogeography in surface sediments of the Northwest Pacific marginal seas显示文摘Overall abundance and species composition of radiolarian faunas were analyzed in surface sediment samples from representative areas of South China Sea,East China Sea,Sea of Japan,Sea of Okhotsk,Bering Sea,Philippine Sea,and the western boundary current regions of the NorthPacific,in order to understand the biogeographic distribution of radiolarians in the Northwest Pacific and explore its relationship with the main environmental factors and the North Pacific circulation.The results showed that radiolarians in the Northwest Pacific surface sediments can be divided into two large biogeographic provinces—cluster A and cluster B.Cluster A is characterized by the dominance of warm-water species and distributed primarily in tropical and subtropical seas with high radiolarian abundance and diversity;whereas cluster B is predominated by cold water species and distributed mainly in the Arctic and subarctic seas with comparably low abundance and diversity.Cluster A is further divided into five subclusters,Al to A5,which correspond to East China Sea,Philippine Sea,South China Sea,Sea of Japan,and Kuroshio Current,respectively;cluster B is divided into three subclusters,B1 to B3,which correspond to Sea of Okhotsk,Bering Sea,and subarctic gyre area,respectively.Based on the relationships between radiolarian faunas and major environment parameters in different biogeographic provinces,we suggest that the sea surface temperature(SST) and sea surface salinity(SSS) are primary factors that influence productivity,composition,and distribution pattern of the radiolarian fauna in the Northwest Pacific regions,while water depth is likely responsible for regional differences in the radiolarian fauna in each marginal sea.In addition,according to the distribution and abundance patterns of common radiolarian species in different areas,we identified five special radiolarian assemblages,which may be used as indicators for main Kuroshio Current,Kuroshio-East China Sea Branch,Kuroshio-South China Sea Branch,Tsushima Current,and Oyashio Current water masses. | LIU Ling ZHANG Qiang CHEN MuHong ZHANG LanLan XIANG Rong | 2017 | Science China Earth Sciences2017，60，3： | 3 |
| 15 | Recent advances in the understanding of the molecular mechanisms regulating platelet integrin αIIbβ3 activation显示文摘Integrins are allosteric cell adhesion receptors that cycle from a low to a high affinity ligand binding state,a complex process of receptor activation that is of particular importance in blood cells such as platelets or leukocytes.Here we highlight recent progress in the understanding of the molecular pathways that regulate integrin activation in platelets and leukocytes,with a special focus on the structural changes in platelet integrinαIIbβ3 brought about by key intracellular proteins,namely talin and kindlins,that are of crucial importance in the regulation of integrin function.Evidence that the small GTPase Rap1 and its guanine exchange factor CalDAG-GEF1,together with RIAM,a Rap1GTP adaptor protein,promote the interaction of talin with the integrinβsubunit,has greatly contributed to fill the gap in our understanding of the signaling pathway from G-coupled agonist receptors and their phospholipase C-dependant second messengers,to integrin activation.Studies of patients with the rare blood cell disorder LAD-III have contributed to the identification of kindlins as new co-regulators of the talin-dependent integrin activation process in platelets and leukocytes,underlining the relevance for the in-depth investigation of patients with rare genetic blood cell disorders. | Lanlan Tao Yue Zhang Xiaodong Xi Nelly Kieffer | 2010 | Protein & Cell2010，1，7： | 3 |
| 16 | Construction of trace silver modified core@shell structured Pt-Ni nanoframe@CeO2 for semihydrogenation of phenylacetylene显示文摘The Pt-Ni nanoframe catalysts have attracted great interest owing to their unique electronic structure and excellent catalytic performance. However, the stability of the tenu ous edges of nano frame-structures is dissatisfactory and their un iversal applicati ons in catalytic market beyond electrocatalytic reactions are yet to be tapped and explored. Herein, we developed a new core@ shell structured Pt-Ni nanoframe@CeO2 (Pt-Ni NF@CeO2) composite via etching the Ni from inhomogeneous Pt-Ni rhombic dodecahedra (Pt-Ni RD) by cerium(lll) acetate hydrate (Ce(OAc)3). In this path, Pt-Ni RD was used as self-sacrificial 怕mplate, while the Ce(OAc)3 serves as the provider of the Ce3* source and OH' for the formation of CeO2 shell, etchant of Pt-Ni RD, and the surface modification agent. By this way, the etching of Pt-Ni RD and the formation of the CeO2 shell are simultaneously proceeded to form the final Pt-Ni NF@CeO2 in one step. The obtained Pt-Ni NF@CeO2 exhibits strong in terfacial charge tran sfer interactio n betwee n Pt-Ni NF core and CeO2 shell eve n without reductio n treatment, leading to enhan ced catalytic activity in the hydrogenation of phenylacetylene. After introduction of trace silver, the Pt-Ni-Ag4.9 NF@CeO2 achieves remarkable catalytic performa nee for the selective con versi on of phe ny lacetyle ne to styrene: high con version (100%), styre ne selectivity (86.5%), and good stability. It reveals that enc apsulatio n n oble metal nano frames into metal oxide to form core @ shell structured hybrids will in deed enhance their stability and catalytic properties. Particularly, this work expends the application of noble metal nanoframes materials to hydrogenation reacti ons. | Yan Long Jian Li Lanlan Wu Qishun Wang Yu Liu Xiao Wang Shuyan Song Hongjie Zhang | 2019 | Nano Research2019，12，4： | 3 |
| 17 | Progress of Fabrication and Applications of Electrospun Hierarchically Porous Nanofibers显示文摘In recent years,electrospun nanofibers have attracted great attention for their facile adjustable structure,morphology feature and chemical composition.Especially,significant interest has been devoted to the development of electrospun nanofibers with multiscale pores from micropores and mesopores to macropores,owing to their large specific surface area,hierarchical pore structures,abundant active sites and many other unique properties and applications.This review presents an overview on the design strategies,preparation methods,physical properties and applications of electrospun hierarchical porous nanofibers.At first,electrospinning fabrication of nanofibers with different types of pores including micropores,mesopores,macropores and hierarchical pores are introduced.Then the structures,properties of electrospun porous nanofibers and their applications in several important areas,such as catalysis,energy storage,adsorption and separation,heat insulation and flame retardant,sound absorption and wave absorption,sensor and biomedical are summarized.At last,challenges and potential opportunities of electrospun porous nanofibers in the future are highlighted. | Ranran Liu Lanlan Hou Guichu Yue Huaike Li Jiesan Zhang Jing Liu Beibei Miao Nü Wang Jie Bai Zhimin Cui Tianxi Liu Yong Zhao | 2022 | Advanced Fiber Materials2022，4，4： | 3 |
| 18 | Accessible chromatin regions and their functional interrelations with gene transcription and epigenetic modifications in sorghum genome显示文摘Accessible chromatin regions(ACRs)provide physical scaffolds to recruit transcriptional co-regulators and displace their nearby nucleosomes in multiple plant species.Characterization of ACRs and investigation of their biological effects in Sorghum bicolor has lagged behind.Regulation of gene expression relies on the transcriptional co-regulators that are recruited to ACRs to affect epigenomic modifications of surrounding nucleosomes.In this study,we employed transposase-accessible chromatin sequencing to identify ACRs and decipher how the presence of ACRs affects gene expression and epigenetic signatures in the Sorghum genome.As a result,21077 ACRs,which are mapped to 22.9%of genes and 2.7%of repeats,were identified.The profiling of ACRs on gene structures reveals a narrow and sharp peak around the transcription start site,with relatively weak and broad signals covering the entire gene body and an explicit but wide peak from the transcription termination site to its downstream regions.We discovered that the correlations between gene expression levels and profiled ACR densities are dependent on the positions of ACRs.The occurrence of genic ACRs cumulatively enhances the transcriptional activity of intergenic ACR-associated genes.In addition,an intricate crosstalk among ACRs,gene expression,and epigenetic marks has been unveiled by integrating multiple-omics analyses of whole-genome bisulfite sequencing,6mA immunoprecipitation followed by sequencing,RNA sequencing,chromatin immunoprecipitation sequencing,and DNase I hypersensitive sites sequencing datasets.Our study provides a genome-wide landscape of ACRs in sorghum,decrypts their interrelations with various epigenetic marks,and sheds new light on their roles in transcriptional regulation. | Chao Zhou Zhu Yuan Xueping Ma Huilan Yang Ping Wang Lanlan Zheng Yonghong Zhang Xiaoyun Liu | 2021 | Plant Communications2021，2，1： | 2 |
| 19 | Dual-metal atoms embedded into two-dimensional covalent organic framework as efficient electrocatalysts for oxygen evolution reaction:A DFT study显示文摘The electrochemical oxygen evolution reaction(OER)is a half-reaction of water-splitting for hydrogen generation,yet suffers from its sluggish kinetics and large overpotential.It is highly desirable to develop efficient and stable OER electrocatalysts for the advancement of water-splitting.Herein,by means of density functional theory(DFT)calculations,we systematically investigated a series of two-dimensional(2D)dual-atom catalysts(DACs)on a novel synthesized covalent organic framework(COF)material as potential efficient catalysts toward the OER.The designed 6 homonuclear(2TM-COF)and 15 heteronuclear(TM1TM2-COF)DACs all exhibit good stability.There is a strong scaling relationship between the adsorption Gibbs free energies of HO*and HOO*intermediates,and the OER overpotential(η^(OER))volcano curve can be plotted as a function ofΔGO*−ΔGHO*.RhIr-COF shows the best OER catalytic activity with aη^(OER)value of 0.29 V,followed by CoNi-COF(0.33 V),RuRh-COF(0.34 V),and NiIrCOF(0.37 V).These four OER DACs exhibit lower onset potential and higher current density than that of the IrO2(110)benchmark catalyst.Aided by the descriptor identification study,the Bader charge that correlated with the Pauling electronegativity of the embedded dual-metal atoms was found to be the most important factor governing the catalytic activity of the OER.Our work highlights a potentially efficient class of 2D COF-based DACs toward the OER. | Yanan Zhou Lanlan Chen Li Sheng Qiquan Luo Wenhua Zhang Jinlong Yang | 2022 | Nano Research2022，15，9： | 2 |
| 20 | Adsorption isotherms and kinetic characteristics of methane on block anthracite over a wide pressure range显示文摘It is important to quantitatively understand the methane adsorption and transport mechanism in coal for an evaluation of the reserves and for its production forecast. In this work, a block coal sample was chosen to perform the CH4 adsorption experiments using the gravimetric method at temperatures of 293.60 K, 311.26 K, 332.98 K and 352.55 K and pressures up to 19 MPa. The excess adsorption capacity of CH4 in dry block anthracite increased, followed by a sequence decrease with the increasing pressure. High temperature restrained the growth of the excess adsorption due to that the adsorption is an intrinsically physical and exothermic process. The excess adsorption peak decreased slowly with the increase of temperature and intersected at a pressure of more than 18 MPa; meanwhile, the pressure at the excess adsorption peak increased.The existing correlations were examined in terms of density rather than pressure. The DR+k correlation, with an average relative deviation of ±0.51%, fitted our data better than the others, with an average relative deviation of up to 2.29%. The transportation characteristics of CH4 adsorption was also investigated in this study, including the adsorption rate and diffusion in block coal. The kinetic data could be described by a modified unipore model. The adsorption rates were found to exhibit dependence on pressure and temperature at low pressures, while the calculated diffusivities exhibited little temperature dependence. In addition, the kinetic characteristics were compared between CH4 and CO2 adsorption on the block coal. The excess adsorption ratios of CO2 to CH4obtained from the DR+k model decreased with the increasing pressure. | Wanli Xing Yongchen Song Yi Zhang Weiguo Liu Lanlan Jiang Yanghui Li Yuechao Zhao | 2015 | Journal of Energy Chemistry2015，24，2： | 2 |
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