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Comparative Study on Antineoplastic Activity of Polysaccharide from Four Kinds of Sea Cucumber

Journal of Ocean University of China 2018年第6期17卷 1473-1478页

作者： ZHAO Ling LIU Qi YANG Xianqing cao rong Department of Food Engineering and Nutrition Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Key Laboratory of Aquatic Product Processing Ministry of AgricultureGuangzhou 510300China Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology Qingdao 266071China

The antineoplastic activity of polysaccharide was investigated in Stichopus chlorontus, Isostichopus badionotus, Stichopus horrens and Holothuria lessoni massin. Crude polysaccharide was prepared with enzyme hydrolyzation method and purified by anion exchange chromatography using DEAE-sepharose fast flow column. The effect of polysaccharide on cells apoptosis of SiHa and U87 was examined with cell counting kit-8 colorimetry method. Western blotting was used to analyze related proteins of cellular apoptosis including p53 and Bcl-2. Results showed that there were two main components in each sea cucumber polysaccharide, which could be eluted down by 1.0 mol/LNaCl solution. The four types of polysaccharide in the second component were named as SC-2, IB-2, HLM-2 and SH-2, respectively. They were used for comparing the antineoplastic activity. Results showed that SC-2, IB-2, HLM-2 and SH-2 could promote apoptosis of U87 and SiHa cells. SH-2 and HLM-2 were selected for the subsequent experiment to explore the additional effect of U87 and SiHa cells, The protein expressions of Bcl-2 and p53 decreased considerably with the increase of polysaccharide concentration in U87 cells. In SiHa cells, protein expressions of Bcl-2 and high dosage group of p53 decreased significantly, whereas no obvious decrease was observed in other groups. The polysaccharides are more effective in promoting apoptosis of U87 and SiHa cells from S. horrens and H. lessoni massin than from the rest species.

关键词： sea cucumber polysaccharide antineoplastic activity

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Hydrophobic long alkyl chain organic cations induced 2D/3D heterojunction for efficient and stable perovskite solar cells

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Journal of Materials Science & Technology 2022年第29期124卷 243-251页

作者： xiang He Min Wang Fengren cao Wei Tian Liang Li School of Physical Science and Technology Center for Energy Conversion Materials and PhysicsJiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006China

Designing post-formed two-dimensional(2D)perovskite on the surface of three-dimensional(3D)perovskite with matched energy levels and high stability is crucial for improving the performance and stability of perovskite solar cells(PSCs).Herein,a long alkyl chain dodecylammonium bromide(DABr)was applied to react with excessive lead iodide(PbI_(2))on the grain boundary of metal halide perovskite preferentially,forming DA_(2)PbI_(4)(n=1)to constitute a clear 2D/3D *** existence of heterojunction increases the intensity of the built-in electric field of the device to enhance carrier separation and extraction,and the amino group of dodecylammonium cation passivates defects,which jointly contribute to the improvement of the power conversion efficiency(PCE)from 20.35 to 21.81%.The long alkyl chain endows the 2D perovskite with good hydrophobic properties,improving the humidity and thermal stability of the *** unencapsulated device can maintain 64%of its initial efficiency after 1065 h storage in ambient air.

关键词： Hydrophobic 2D/3D perovskite Heterojunction Solar cell Stability

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NOMA-Based Cooperative Relaying Transmission for the Industrial Internet of Things

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Computers, Materials & Continua 2022年第12期73卷 6513-6534页

作者： Yinghua Zhang Rui cao Lixin Tian rong Dai Zhennan cao Jim Feng Dawning Information Industry Co. Ltd.Beijing100193China Dawning Information Industry Chengdu Co. Ltd.Chengdu610041China Amphenol Global Interconnect Systems San JoseCA95131US

With the continuous maturity of the fifth generation(5G)communications,industrial Internet of Things(IIoT)technology has been widely applied in fields such as smart *** smart factories,5G-based production line monitoring can improve production efficiency and reduce costs,but there are problems with limited monitoring coverage and insufficient wireless spectrum resources,which restricts the application of IIoT in the construction of smart *** response to these problems,we propose a hybrid spectrum access mechanism based on Non-Orthogonal Multiple Access(NOMA)cooperative relaying transmission to improve the monitoring coverage and spectrum *** there are a large number of production lines that need to be monitored in smart factories,it is difficult to realize real-time monitoring of all production lines due to insufficient wireless ***,we divide the production lines into high priority and low priority,and introduce cognitive radio technology to increase the number of monitoring production *** order to better describe the wireless fading channel environment in the factory,the two-wave with diffuse power(TWDP)channel is discussed to simulate the real factory environment and the outage probability of the secondary production line data transmission is derived in the proposed *** with the traditional mechanism,the proposed transmission mechanism can ensure the continuity of the secondary transmission,greatly reduce the outage probability of the secondary transmission,and improve the efficiency of the monitoring of the production lines.

关键词： Relay IIoT outage probability NOMA TWDP beam-forming

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Newπ-conjugated cyanostilbene derivatives:Synthesis,characterization and aggregation-induced emission

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Chinese Chemical Letters 2016年第10期27卷 1592-1596页

作者： Fang Wang Xue Li Sheng Wang Cheng-Peng Li Huan Dong xiang Ma Sung-Hoon Kim De-rong cao School of Chemistry and Chemical Engineering State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology.Cuangzhou 510641China Key Laboratory of Applied Chemistry and School of Chemistry and Chemical Engineering Development Center for New Materials Engineering&Technologyin Universities of GuangdongLingnan Normal UniversityZhanjiang 524048China Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and TechnologyShanghai 200237China Department of Advanced Organic Materials Science and Engineering Kyungpook National UniversityDaegu 702-701Republic of Korea

Two novel Jr-conjugated cyanostilbene derivatives, FLU-CNPH and TPE-CNPH, were designed aria synthesized by introducing the strong electron donor 1, 4-dihydropyrro[3,2-b]indole and AIE electron donor tetraphenylethylene （TPE） to the （3＇,5＇-bis（trifluoromethyl）-biphenyl-4-yl）-acetonitrile, respec- tively, Both of them were fully characterized and their AIE behaviors were investigated using fluorescence spectroscopy and FE-SEM images. Their optimized structures and frontier molecular orbitals were calculated with the DFT by using Materials Studio 7,0 software to study the relationship between the structure and properties.

关键词： π-Conjugated cyanostilbene derivatives1 4-Dihydropyrro[3 2-b]indoleTetraphenylethyleneAggregation-induced emissionMaterials Studio

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Influence of Endwall Air Injection with Discrete Holes on Corner Separation of a Compressor Cascade

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Journal of Thermal Science 2021年第5期30卷 1684-1704页

作者： cao Zhiyuan GAO Xi ZHANG xiang ZHANG Fei LIU Bo School of Power and Energy Northwestern Polytechnical UniversityXi’an710072China

The aim of this study is to reveal the influence mechanism of endwall air injection with distributed holes on the corner separation of a highly loaded compressor cascade,so as to promote the application of injection in ***-hole and double-hole endwall injection schemes featuring different axial locations,pitchwise locations,injection mass rates and injection directions,were designed and *** showed that the corner separation was eliminated by endwall injection;the optimal single-hole injection scheme achieved an endwall loss coefficient reduction of 29.7%,with injection coefficient as low as 0.48%.The optimal axial location of single-hole endwall injection was at 82%axial chord,being the center of corner ***,as injection hole was located at upstream of it,endwall injection resulted in severer corner *** mid-span flow field was deteriorated after endwall injection,which was due to 3D flow effects,i.e.,AVDR(axial velocity density ratio)effect and low-momentum fluid spanwise migration *** optimal injection was achieved at low injection angle and from close to the suction surface on ***-hole injection exhibited inferior performance compared with single-hole,which was due to the interaction of the two injection streams and mixing of injection streams with the bulk stream.

关键词： compressor cascade corner separation flow control air injection endwall discrete hole injection

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Efficient photoelectrodes based on two-dimensional transition metal dichalcogenides heterostructures:from design to construction

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Rare Metals 2022年第4期41卷 1142-1159页

作者： xiang-Chao Lu Yi-Zhen Lu Cong Wang Yang cao State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China

Hydrogen production by photoelectrochemical(PEC) water splitting converts the inexhaustible supply of solar radiation to storable H2 as clean energy and thus has received widespread *** efficiency of PEC water splitting is largely determined by the properties of the ***-dimensional(2 D) layered transition metal dichalcogenides(TMDs) are promising candidates for photoelectrodes due to their atomic layer thickness,tunable bandgap,large specific surface area,and high carrier ***,the construction of 2 D TMDs heterostructures provides freedom in material design,which facilitates the further improvement of PEC water *** review begins by describing the mechanism of PEC water splitting and the advantages of 2 D TMDbased heterostructures for photo ***,the design considerations of the heterostructures for enhanced PEC efficiency are comprehensively reviewed with a focus on material selection,band engineering,surface modification,and long-term ***,current challenges and future perspectives for the development of photoelectrodes based on 2 D TMDs heterostructures are addressed.

关键词： Two-dimensional transition metal van der Waals heterostructure Photoelectrode Photoelectrochemical cell Water splitting

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Downlink network-coded multiple access with diverse power

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Digital Communications and Networks 2024年第4期10卷 956-964页

作者： Bohao cao Zheng xiang Peng Ren Qiao Li Baoyi Xu School of Telecommunications Engineering Xidian UniversityXi'anShaanxi710071China

Normally,in the downlink Network-Coded Multiple Access(NCMA)system,the same power is allocated to different ***,equal power allocation is unsuitable for some scenarios,such as when user devices have different Quality of Service(QoS)***,we study the power allocation in the downlink NCMA system in this paper,and propose a downlink Network-Coded Multiple Access with Diverse Power(NCMA-DP),wherein different amounts of power are allocated to different *** terms of the Bit Error Rate(BER)of the multi-user decoder,and the number of packets required to correctly decode the message,the performance of the user with more allocated power is greatly improved compared to the Conventional NCMA(NCMA-C).Meanwhile,the performance of the user with less allocated power is still much better than ***,the overall throughput of NCMA-DP is greatly improved compared to that of *** simulation results demonstrate the remarkable performance of the proposed NCMA-DP.

关键词： Network-coded multiple access Physical-layer network coding Multi-user decoder Power allocation Throughput Downlink network

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In-situ growth of porous Cu_(3)(BTC)_(2) on cellulose nanofibrils for ultra-low dielectric films with high flexibility

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Journal of Materials Science & Technology 2022年第17期112卷 202-211页

作者： Rui Liu xiang He Miao Miao Shaomei cao Xin Feng Department of Chemistry College of SciencesShanghai UniversityShanghai 200444China Research Center of Nano Science and Technology College of SciencesShanghai UniversityShanghai 200444China

The design of flexible polymeric films with internal porous structures has received increasing attention in low dielectric *** highly porous metal-organic frameworks(MOFs)of[Cu_(3)(BTC)_(2)]_(n)(BTC=benzene-1,3,5-tricarboxylate)were introduced into aramid nanofibers(ANF)matrix by using carboxylated cellulose nanofibrils(CNF)as carriers to obtain strong,flexible,and ultra-low dielectric *** well-dispersed“flowers-branch”like CNF@CuBTC through in-situ growth of CuBTC on CNF surface endowed the ANF/CNF@Cu BTC films with excellent thermal stability,mechanical integrity and low dielectric ***,the flexible dielectric films exhibited superior ultraviolet(UV)resistance,lower coefficient of thermal expansion(4.28×10^(-5)℃^(-1))and increased water contact angle(83.81°).More interestingly,the removal of guest molecules from the ANF/CNF@CuBTC films according to the vacuum heat treatment(VHT)process significantly improved their dielectric *** specific surface areas of the composite films after VHT increased obviously,and the dielectric constant and dielectric loss tangent decreased to the expected 1.8-2.2 and 0.001-0.03 at 100 MHz,***,such designable ultra-low dielectric films with high flexibility play an incredible significance in applications of microelectronics under large deformation conditions,especially in flexible/wearable devices at the arrival of 5 G era.

关键词： Aramid nanofibers Carboxylated cellulose nanofibrils Vacuum heat treatment Dielectric properties Metal-organic frameworks

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Effect of protrusion amount on gas ingestion of radial rim seal

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Chinese Journal of Aeronautics 2020年第3期33卷 893-901页

作者： Zeyu WU xiang LUO Nan cao Xue LI Hang CHEN School of Energy and Power Engineering Beihang UniversityBeijing 100083China National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics Beihang UniversityBeijing 100083China

In this paper, the effect of different amount of protrusion on various parameters in rotor–stator system was experimentally studied by measuring CO_2 concentration and pressure, in order to obtain the optimal protrusion *** parameters of different dimensionless sealing flow were measured under the condition that the annulus Reynolds number was 4.39 × 10~5 and the rotating Reynolds number was 1.05 × 10~*** results show that the change of the amount of protrusions has little effect on the static pressure in the cavity, and the static pressure change near the sealing ring is almost *** the total pressure and sealing efficiency increase first and then decrease with the increase of the amount of *** variation of power consumption is the same.A complex vortex structure will appear at the high radius region when the protrusion is *** the other hand, the protrusion can effectively reduce the minimum sealing flow of the rotor–stator ***, considering the sealing efficiency and power consumption,the best range of the protrusion amount is about *** ratio near this range can optimally balance the alleviation of the gas ingestion and the reduction of the power consumption.

关键词： Gas ingestion Protrusion amount Radial seal Rotor–stator cavity Sealing efficiency Turbine

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计吏、“贡士”与东汉贡献秩序的演变——以“举计吏”为线索

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古代文明（中英文） 2025年第1期19卷 94-105,M0006页

作者：曹天江中央民族大学历史文化学院北京100081

东汉时期流行起来的“举计吏”一语,将上计与察举相联系,为观察东汉上计事务与贡献秩序的关系及其意义提供了视点。细考史料所见郡国上计案例,可知上计与察举的前途相似,但当时并未将计吏设为正式的察举科目。与西汉相比,东汉上计对计... 详细信息

东汉时期流行起来的“举计吏”一语,将上计与察举相联系,为观察东汉上计事务与贡献秩序的关系及其意义提供了视点。细考史料所见郡国上计案例,可知上计与察举的前途相似,但当时并未将计吏设为正式的察举科目。与西汉相比,东汉上计对计吏的能力要求不再突出,计吏与长官的亲厚程度及其才学声望等成为更重要的因素,其人选也转向高级郡吏与布衣名士,并被赋予了地方“人才”的色彩。进而,郡国不再将上计之事推托给小吏,而是主动推荐计吏。加上察举诸生“与计偕”规定的长期执行及东汉贡献礼仪的日益完备,上计与察举在事务与观念上逐渐合流,最终,计吏被纳为“贡士”之选,统合贡献秩序中,彰显郡国对朝廷的属从关系,象征王朝国家对全国上下人、事、物全面的掌控。

关键词：上计贡士贡献秩序举计吏察举

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