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45篇 您的检索式:作者名="Chaoqi"
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1Marine Geohazards: Review and Future Perspective显示文摘With offshore resource exploration moving to the deep water, marine geohazards have been attracting attention from the academic and industry. Research achievements of marine geohazards were reviewed in this paper. We analyzed and discussed typical issues among marine geohazards, including coastal erosion, submarine slope failure, turbidity current and special hazards induced by gas hydrate dissociation, in terms of their definition, distribution, characteristics and case studies. Major international projects on marine geohazards headed by the United States, Europe, Japan and other international organizations are introduced as well. Three marine geohazard survey methods, including geophysical survey, geotechnical exploration and in-situ observation, were summarized with a brief description of each approach, respectively. Especially, the history of marine geohazard researches in China is briefly reviewed, showing the disparity between China and developed countries in the study of marine geohazards narrows gradually. The potential research tendency in future was suggested.JIA Yonggang ZHU Chaoqi LIU Liping WANG Dong 2016Acta Geologica Sinica(English Edition)2016,90,4:18
2Vertical Migration of Fine-Grained Sediments from Interior to Surface of Seabed Driven by Seepage Flows–‘Sub-Bottom Sediment Pump Action'显示文摘A scientific hypothesis is proposed and preliminarily verified in this paper: under the driving of seepage flows, there might be a vertical migration of fine-grained soil particles from interior to surface of seabed, which is defined as ‘sub-bottom sediment pump action' in this paper. Field experiments were performed twice on the intertidal flat of the Yellow River delta to study this process via both trapping the pumped materials and recording the pore pressures in the substrate. Experimental results are quite interesting as we did observe yellow slurry which is mainly composed of fine-grained soil particles appearing on the seabed surface; seepage gradients were also detected in the intertidal flat, under the action of tides and small wind waves. Preliminary conclusions are that ‘sediment pump' occurs when seepage force exceeds a certain threshold: firstly, it is big enough to disconnect the soil particles from the soil skeleton; secondly, the degree of seabed fluidization or bioturbation is big enough to provide preferred paths for the detached materials to migrate upwards. Then they would be firstly pumped from interior to the surface of seabed and then easily re-suspended into overlying water column. Influential factors of ‘sediment pump' are determined as hydrodynamics(wave energy), degree of consolidation, index of bioturbation(permeability) and content of fine-grained materials(sedimentary age). This new perspective of ‘sediment pump' may provide some implications for the mechanism interpretation of several unclear geological phenomena in the Yellow River delta area.ZHANG Shaotong JIA Yonggang WEN Mingzheng WANG Zhenhao Zhang Yaqi ZHU Chaoqi Li Bowen LIU Xiaolei 2017Journal of Ocean University of China2017,16,1:8
3Dynamics of Bottom Boundary Layers in the Yellow River Subaqueous Delta Based on Long-Term In-Situ Observations显示文摘Objective In geo-marine science,the generalized bottom boundary layer(BBL)represents a layer between sediments and seawater.The BBL plays an important role in geological,geobiochemical,geophysical and geotechnical research because it is the connection region of hydrosphere,ZHU Chaoqi JIA Yonggang WANG Zhenhao GUO Lei SHAN Hongxian LIU Xiaolei ZHANG Minsheng 2017Acta Geologica Sinica(English Edition)2017,91,1:8
4An individualized immune signature of pretreatment biopsies predicts pathological complete response to neoadjuvant chemoradiotherapy and outcomes in patients with esophageal squamous cell carcinoma显示文摘No clinically available biomarkers can predict pathological complete response(pCR)for esophageal squamous cell carcinomas(ESCCs)with neoadjuvant chemoradiotherapy(nCRT).Considering that antitumor immunity status is an important determinant for nCRT,we performed an integrative analysis of immune-related gene profiles from pretreatment biopsies and constructed the first individualized immune signature for pCR and outcome prediction of ESCCs through a multicenter analysis.During the discovery phase,14 differentially expressed immune-related genes(DEIGs)with greater than a twofold change between pCRs and less than pCRs(Chaoqi Zhang Guochao Zhang Nan Sun Zhen Zhang Liyan Xue Zhihui Zhang Haijun Yang Yuejun Luo Xiaoli Zheng Yonglei Zhang Yufen Yuan Ruixue Lei Zhaoyang Yang Bo Zheng Le Wang Yun Che Feng Wang Sihui Wang Shugeng Gao Qi Xue Yi Zhang Jie He 2020Signal Transduction and Targeted Therapy2020,5,1:7
5Occurrence of Different Forms and Implications of Compound Specific Sterols in Continental Sediments of the Northeast South China Sea显示文摘The South China Sea(SCS) is one of the most productive and accumulative marginal shelves of organic carbon in the world. To expound the transformation and preservation of organic carbon in the Northeast SCS, where abundant oil and gas resources have been reported, compound specific sterols in free(FR), base hydrolytic(BH), and acid hydrolytic(AH) forms were analyzed in surface and columnar sediments in May, 2016. The results showed that the total contents of sterols detected ranged from 0.15 to 3.74 ppm dry weight in the surface sediments, and gradually decreased from 3.41 to0.17 ppm dry weight from surface to deep sediments, in which cholesterol(27^(△5)) was the most abundant component. Sterols mainly existed in the BH form(54.51%-74.20%), followed by the FR form(25.50%-45.49%) and then the AH form(0-3.77%) in turn, in the surface sediments. BH and FR sterols accounted for 0-49.08% and 50.92%-100% in the columnar sediments, while AH sterols were undetectable. The contents of specific sterols indicated that, the primary source of marine organic carbon was about 5 times as much as that from terrestrial input. More and more FR sterols transformed into BH sterols with increasing sedimentary depth, and BH sterols absolutely dominated in sediment depths under 25 cm. The forms of Sterols C27 were maintained at a relative consistence state, but Sterols C28 to C30 degraded gradually during the sedimentation process. It was suggested that the stability of sterols, based on the chemical structures, might be the primary factor controlling their degradation and preservation in deeper sediments. These results would help to understand the organic carbon(OC) transformation in a hydrate formation area in a marginal sea.QIU Hong ZOU Li ZHANG Minsheng ZHU Chaoqi JIA Yonggang 2019Acta Geologica Sinica(English Edition)2019,93,2:6
6Ethylene and salicylic acid synergistically accelerate leaf senescence in Arabidopsis显示文摘The phytohormones ethylene and salicylic acid(SA) have long been known to promote senescence, but their interplay during this process remains elusive. Here we report the synergistic effects of ethylene and SA on promoting leaf senescence in Arabidopsis. EIN3, a key transcription factor of ethylene signaling, physically interacted with the core SA signaling regulator NPR1 in senescing leaves. EIN3 and NPR1 synergistically promoted the expression of the senescence-associated genes ORE1 and SAG29.The senescence phenotype was more delayed for the ein3 eil1 npr1 triple mutant than ein3 eil1 or npr1 with ethylene or/and SA treatment. NPR1-promoted leaf senescence may depend on functional EIN3/EIL1.Chaoqi Wang Shouyi Dai Zhong‐Lin Zhang Wenqing Lao Ruiying Wang Xianqing Meng Xin Zhou 2021Journal of Integrative Plant Biology2021,63,5:4
7Sacrificial microgel‑laden bioink‑enabled 3D bioprinting of mesoscale pore networks显示文摘Three-dimensional(3D)bioprinting is a powerful approach that enables the fabrication of 3D tissue constructs that retain complex biological functions.However,the dense hydrogel networks that form after the gelation of bioinks often restrict the migration and proliferation of encapsulated cells.Herein,a sacrificial microgel-laden bioink strategy was designed for directly bioprinting constructs with mesoscale pore networks(MPNs)for enhancing nutrient delivery and cell growth.The sacrificial microgel-laden bioink,which contains cell/gelatin methacryloyl(GelMA)mixture and gelled gelatin microgel,is first thermo-crosslinked to fabricate temporary predesigned cell-laden constructs by extrusion bioprinting onto a cold platform.Then,the construct is permanently stabilized through photo-crosslinking of GelMA.The MPNs inside the printed constructs are formed after subsequent dissolution of the gelatin microgel.These MPNs allowed for effective oxygen/nutrient diffusion,facilitating the generation of bioactive tissues.Specifically,osteoblast and human umbilical vein endothelial cells encapsulated in the bioprinted large-scale constructs(≥1 cm)with MPNs showed enhanced bioactivity during culture.The 3D bioprinting strategy based on the sacrificial microgel-laden bioink provided a facile method to facilitate formation of complex tissue constructs with MPNs and set a foundation for future optimization of MPN-based tissue constructs with applications in diverse areas of tissue engineering.Lei Shao Qing Gao Chaoqi Xie Jianzhong Fu Meixiang Xiang Zhenjie Liu Liulin Xiang Yong He 2020Bio-Design and Manufacturing2020,3,1:3
8In-situ Observations of Engineering Geological Environment during Hydrate Production Tests in Deepwater显示文摘Gas hydrates are ice-like combinations of methane and water.The global inventory of gas hydrates appears to be very large.Recent estimates of the total amount of methane contained in the world’s gas hydratesZHU Chaoqi JIA Yonggang 2017Acta Geologica Sinica(English Edition)2017,91,S1:3
9Unadulterated carbon as robust multifunctional electrocatalyst for overall water splitting and oxygen transformation显示文摘Developing the highly efficient and durable non-precious metal electrocatalysts by taking advantage of inexpensive and abundant resources is of paramount importance for the widespread application of energy conversion and storage techniques such as fuel cells and metal-air batteries.Herein,the sponge-like unadulterated carbontube-graphene complexes(D/G-CTs-1,000)with multifarious intrinsic defect active sites are fabricated by boric acid-hydrothermal and pyrolysis treatments.The close contact or juncture between open nanotubes and few-layer graphene in D/G-CTs-1,000 constructs the hierarchical networks with plentifuchannels,the larger surface area and outstanding conductivity.As a result,the as-prepared D/G-CTs-1,000 electrocatalyst exhibits an excellent trifunctional electrocatalytic performance for oxygen reduction reaction(ORR),oxygen evolution reactior(OER)and hydrogen evolution reaction(HER).The primary Zn-air batteries and overall water splitting system using D/G-CTs-1,000 as the electrode materials delivers higher power density outperforming the advanced Pt/C-based batteries and the overall watersplitting performance comparable to those using the non-precious metal/carbon-based materials as electrode.This work provides a universal and efficient synthetic strategy to produce the unadulterated carbons with high activity and long-time durability as trifunctional electrocatalysts and promote the widespread applications of metal-free electrocatalysts in sustainable energy conversior technology.Fantao Kong Yu Qiao Chaoqi Zhang Xiaohong Fan Aiguo Kong Yongkui Shan 2020Nano Research2020,13,2:3
10Surface strain-enhanced MoS_(2)as a high-performance cathode catalyst for lithium-sulfur batteries显示文摘Lithium-sulfur batteries(LSBs)are one of the main candidates for the next generation of energy storage systems.To improve the performance of LSBs,we herein propose the use of strained MoS_(2)(s-MoS_(2))as a catalytically active sulfur host.The introduction of strain in the MoS_(2)surface,which alters its atomic positions and expands the S-Mo-S angle,shifts the d-band center closer to the Fermi level and provides the surface with abundant and highly active catalytic sites;these enhance the catalyst's ability to adsorb lithium polysulfides(LiPS),accelerating its catalytic conversion and promoting lithium-ion transferability.Strain is generated through the synthesis of core-shell nanoparticles,using different metal sulfides as strain-inducing cores.s-MoS_(2)nanoparticles are supported on carbon nanofibers(CNF/s-MoS_(2)),and the resulting electrodes are characterized by capacities of 1290 and 657 mAh g−1 at 0.2 and 5 C,respectively,with a 0.05%capacity decay rate per cycle at 8 C during 700 cycles.Overall,this work not only provides an ingenious and effective strategy to regulate LiPS adsorption and conversion through strain engineering,but also indicates a path toward the application of strain engineering in other energy storage and conversion fields.Chao Yue Zhang Chaoqi Zhang Jiang Long Pan Guo Wen Sun Zude Shi Canhuang Li Xingqi Chang Geng Zhi Sun Jin Yuan Zhou Andreu Cabot 2022eScience2022,2,4:3
11Differentially expressed genes analysis and target genes prediction of miR-22 in breast cancer显示文摘Objective miR-22 is highly active in breast cancer, especially in the luminal B and HER2 subtypes.However, the detailed potential of the use of target genes for miR-22 in breast cancer are still unclear. Inthis study, we aimed to discover potential genes and the miRNA-DEGs network of miR-22 in breast cancerusing bioinformatics approaches.Methods Analysis of microarray data GSE17508 (including 3 miR-22 knockout samples and 3 controls)obtained from the Gene Expression Omnibus (GEO) database was performed. Differentially expressedgenes (DEGs) between the miR-22 knockout samples and the three control samples were detected usingGEO2R. The gene ontology (GO) functional enrichment analysis and protein-protein interaction (PPI)network of DEGs were performed using the online tool Metascape and STRING database, separately. ThemiR-22 and DEG networks were obtained from the miRNet database. Cytoscape software was used toconstruct and analyze a merged miRNA-DEG network. The online tools database, mirDIP 4.1, was used topredict miR-22 target genes.Results Certain DEGs and miRNAs may be potential targets for predicting and treating miR-22 expressedbreast cancer.Conclusion We constructed a prognostic model of rectal adenocarcinomas based on four immunerelatedlncRNAs by analyzing the data based on TCGA database, with high prediction accuracy. We alsoidentified two biomarkers with poor prognosis (PXN-AS1 and AL158152.2) and one biomarker with goodprognosis (LINC01871).Tao Fan Chaoqi Wang Kun Zhang Hong Yang Juan Zhang Wanyan Wu Yingjie Song 2021Oncology and Translational Medicine2021,7,2:2
12The observations of seabed sediment erosion and resuspension processes in the Jiaozhou Bay in China显示文摘In estuarine and coastal areas, the seabed is in a constant process of dynamic change under marine conditions.Seabed sediment erosion and resuspension are important processes that safely control the geological environment. Field tripod observations conducted in the Jiaozhou Bay in China are reported, to investigate the effects of hydrodynamic conditions on the erosion and resuspension processes of the seabed. The observational results show that the maximum shear stress created by tidal currents can reach 0.35 N/m^2, which is higher than the wave-induced shear stress during fair weather conditions. A seabed erosion frequently occurs during the flood tide, whereas a seabed deposition occurs during ebb tide. Waves can produce a bottom shear stress approximately equivalent to that induced by currents when the local wind reaches Force 4 with a speed of 5 m/s.When the wind reaches 7 m/s and the significant wave height reaches 26 cm, waves play a more significant role than currents in the dynamic processes of the seabed sediment resuspension and lead to a high value of turbidity that is approximately two to eight times higher than that in fair weather. These analyses clearly illustrate that periodic current-induced sediment erosion and resuspension are dominant in fair weather, whereas episodic high waves are responsible for significant sediment resuspension. Additional work is needed to establish a more thorough understanding of the mechanisms of sediment dynamics in the Jiaozhou Bay.LIU Xiaolei ZHU Chaoqi ZHENG Jiewen GUO Lei YIN Ping JIA Yonggang 2017Acta Oceanologica Sinica2017,36,11:2
13Core antigen tests for hepatitis C virus: a meta-analysis显示文摘Shuijun Gu Jun Liu Huijun Zhang Baoluo Gu Hanjiang Lai Hongliang Zhou Chaoqi He Yingying Chen 2012Molecular Biology Reports2012,,8:2
14Comparative Analysis of Pollutant Characteristics during a Fog,Haze and Sandstorm显示文摘Characteristics of air pollutants during three types of low-visibility weather in west-central Inner Mongolia were analyzed.The results showed that in the three processes,air pollution was slight during the heavy fog and serious during the haze and sandstorm.PM 10 concentration had the biggest difference among the six pollutants.During the heavy fog,the hourly concentration of PM 2.5 in Hohhot City varied from tens to 100 μg/m^3,while that of PM10 ranged from tens to 200 μg/m^3,and that of O3,NO2,SO2 and CO was low.During the haze,the hourly concentration of PM2.5 and PM10 in Hohhot City ranged from tens to 600 μg/m^3.The heavy atmospheric pollution was caused by both PM2.5 and PM10 .The O3 concentration during the haze was lower than that during the heavy fog.The accumulation of NO2,SO2 and CO had a significant effect on the aggravation of atmospheric pollution.During the sandstorm,the hourly concentration of PM 10 in Hohhot City varied from about 100 to 5 000 μg/m^3.It had a hysteresis effect on the position and intensity of sandstorm,and there was no obvious daily change.The stronger the sandstorm was,the larger the hourly concentration of PM10 was.The hourly concentration of PM2.5 ranged from tens to 500 μg/m^3,and there was no obvious daily variation.When the sandstorm was the strongest,PM10 was the main contributor to air pollution,but the air pollution caused by PM2.5 was also serious.The atmospheric pollution from O3 was considerable.The hourly concentration of NO2,SO2 and CO during the sandstorm was obviously lower than that during the heavy fog and haze,and there was no obvious daily change.Dang Chaoqi Song Guiying Jiang Jing Hou Ting Ren Yuanzhe 2019Meteorological and Environmental Research2019,10,3:1
15Ultrathin flexible InGaZnO transistor for implementing multiple functions with a very small circuit footprint显示文摘There is a continuous demand to reduce the size of the devices that form a unit circuit,such as logic gates and memory,to reduce their footprint and increase device integration.In order to achieve a highly efficient circuit architecture,optimizations need to be made in terms of device processing.However,the time involved in the current reduction of device sizes according to Moore's Law has slowed down.Here,we propose a flexible transistor with ultra-thin IGZO(InGaZnO,indium-gallium-zinc-oxide)as the channel material,which not only scales down the footprints of multi-transistor logic gates but also combines the functions of the logic gates,memory,and sensors into a single cell.The transistor proposed here has an ultrathin semiconductor layer and can implement the typical functions of logic gates that conventionally have 2-6 transistors.Furthermore,it demonstrates the memory effect with a programming time as low as 5 ns.This design can also display various artificial synaptic behaviors.This new device design and structure can be adopted for the development of next-generation flexible electronics that require higher integration.Chaoqi Dai Peiqin Chen Shaocheng Qi Yongbin Hu Zhitang Song Mingzhi Dai 2021Nano Research2021,14,1:1
16Validation and Analysis of Detailed Kinetic Models for Ethylene Combustion显示文摘Xu Chaoqi Konnov A A 2012Energy2012,43,1:1
17Nano-sized spinel LiMn204 powder fabricated vla modified dynamic hydrothermal synthesis显示文摘Yao Jinhan Lv Longteng Shen Chaoqi 2013Ceramics International2013,39,3:1
18Mesoporous resin nanobowls with optimized donor-acceptor conjugation for highly efficient photocatalytic hydrogen peroxide production显示文摘Design of metal-free photocatalysts with customized chemical structure and nano-architecture is promising for photocatalytic hydrogen peroxide(H2O_(2))production.Herein,for the first time,mesoporous resorcinol-formaldehyde(MRF)nanobowls with optimized benzenoid-quinoid donor-acceptor(D-A)couples have been synthesized via an assembly-hydrothermal-etching process as high-performance photocatalysts for H2O_(2) production in a sacrificial agent-free system.At the hydrothermal temperature of-250℃,MRF-250 exhibits optimized structural features including a large surface area,suitable D-A couple ratio,enhanced light absorption,charge-hole separation and mass transfer.Thus,MRF-250 shows an unexpected H2O_(2) yield of 19.4 mM·g^(-1)·h^(-1) in pure water,outperforming other RF samples prepared under different conditions and superior to most reported metal-free photocatalysts without the aid of sacrificial agents.Our work paves the way towards the elaborate design of highly effective metal-free photocatalysts for H2O_(2) production.Ling Yuan Chaoqi Zhang Jing Wang Chao Liu Chengzhong Yu 2021Nano Research2021,14,9:1
19Surface Sediment Density and Moisture Content in North slope of South China Sea显示文摘Marine engineering geology is mainly based on the actual project to study the seabed.This provides a variety of engineering geological parameters for the development of marine engineering(Zhu et al.,2016).This is anZHANG Bowen ZHU Chaoqi JIA Yonggang ZHANG Xiatao DAI Xinnan SHEN Zhicong JIANG Jun WANG Xinquan 2017Acta Geologica Sinica(English Edition)2017,91,S1:1
20Synthesis and properties of Li 3 V 2? x Ce x (PO 4 ) 3 /C cathode materials for Li-ion batteries显示文摘Jinhan Yao Shuoshuo Wei Pinjie Zhang Chaoqi Shen Kondo-Francois Aguey-Zinsou Lianbang Wang 2012Journal of Alloys and Compounds2012,,:1
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