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Journal of Oceanology and Limnology 2021年第4期39卷 1513-1522页

作者： pengcheng lin Huaming HU Fei LIU Mingzheng LI Huanzhang LIU Institute of Hydrobiology Chinese Academy of SciencesWuhan 430072China Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences Chinese Academy of SciencesWuhan 430072China

Psilorhynchus homaloptera mainly inhabits turbulent waters in the lower reach of the Yarlung Zangbo River,Tibet,China,and it is the only species of Psilorhynchus in ***,many important aspects of its biology remain poorly documented,which hinders the conservation eff ***,we studied its reproduction using 801 specimens from the Motuo sector of the lower Yarlung Zangbo River from December 2015 to November *** sex ratio was 0.68꞉1(male꞉female)for the overall *** reached a larger total length and weight(134 mm and 18.6 g)than males did(113 mm and 12.2 g).Lengths at maturity were estimated 80.0 mm for males and 93.1 mm for *** analyses of gonad development and the size distribution of oocytes suggest that *** is a single spawner with the peak spawning period between September and ***,the estimated mean absolute fecundity was 557±204 eggs per fish,and mean relative fecundity was 50.9±10.9 eggs per g of female *** fecundity of *** increased linearly with increasing total length,total weight,ovary weight,and *** study on the reproductive biology of *** demonstrates that the fish was in a vulnerable state due to the increasing anthropogenic activities in the lower Yarlung Zangbo River.

关键词： reproductive biology maturity spawning period fecundity environmental adaptation

Remediation performance and mechanisms of Cu and Cd contaminated water and soil using Mn/Al-layered double oxide-loaded biochar

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Journal of Environmental Sciences 2023年第3期125卷 593-602页

作者： pengcheng lin Hang Liu Hua Yin Minghan Zhu Haoyu Luo Zhi Dang School of Environment and Energy South China University of TechnologyGuangzhou 510006China Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters Guangzhou 510006China Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling Guangzhou 510006China

The combined pollution of heavy metals is ubiquitous ***/Al-layered double oxide-loaded crab shells biochar (LDO/BC) was prepared,so as to remediate the combined pollution of Cd and Cu in soil and *** pristine and used LDO/BC were characterized and the results revealed that the layered double oxide was successfully loaded on crab shells biochar (BC) and metal element Ca in crab shells was beneficial to the formation of more regular layered and flake *** maximal adsorption capacity (Qm) of LDO/BC for aqueous Cu^(2+)and Cd^(2+)was 66.23 and 73.47 mg/g,***/BC and BC were used to remediate e-waste-contaminated soil for the first time and exhibited highly efficient *** extraction amount of Cu and Cd in the contaminated soil by diethylene triamine penta-acetic acid (DTPA) after treating with 5% LDO/BC was significantly reduced from 819.84 to 205.95 mg/kg (with passivation rate 74.8%) and 8.46 to 4.16 mg/kg(with passivation rate 50.8%),respectively,inferring that the bioavailability of heavy metals declined *** experimental result also suggested that after remediation by LDO/BC the exchangeable and weak acid soluble Cu and Cd in soil translated to reducible,residual and oxidizable fraction which are more stable ***,complexation and ion exchange were proposed as the possible mechanisms for Cd and Cu *** general,these experiment results indicate that LDO/BC can be a potentially effective reagent for remediation of heavy metal contaminated water and soil.

关键词： Mn/Al-layered double oxide Biochar Cd and Cu combined pollution Adsorption Soil remediation

Long-term monitoring revealed fish assemblage zonation in the Three Gorges Reservoir

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Journal of Oceanology and Limnology 2019年第4期37卷 1258-1267页

作者： lin pengcheng GAO Xin LIU Fei LI Mingzheng LIU Huanzhang Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 China The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences Chinese Academy of Sciences Wuhan 430072 China

Reservoirs are important artificial ecosystems that modify the hydrological and ecological characteristics of a river. Knowledge of the basic characteristics of fish assemblages in reservoirs is a first step toward the development of effective conservation policies. We used the information collected over a 10-year period (2006-2015) to assess the structure of the fish assemblages in the Three Gorge Reservoir (TGR) in a river-dam gradient. Three fish zones were detected in TGR. Species richness was the highest in the upper zone and lowest in the lower zone. The riverine zones were dominated by rheophilic species Coreius guichenoti and Pelteobagrus vachelli. The transitional zones were dominated by Coreius heterodon and Rhinogobio cylindricus. The lacustrine zones were dominated by eurytopic species Hypophthalmichthys molitrix, Aristichthys nobilis, Hemiculter bleekeri and Cyprinus carpio. For the functional characteristics, fish assemblages in riverine and transitional zones were dominated by insectivorous species, equilibrium strategists and rheophilic species (e.g., Coreius heterodon and Coreius guichenoti). In lacustrine zones, the fish assemblage was dominated by habitat generalists common to lakes and reservoirs (e.g., Hemiculter bleekeri, Hypophthalmichthys molitrix, Aristichthys nobilis). Moreover, 18 exotic species (e.g., Protosalanx hyalocranius, Ictalurus punctatus, Megalobrama amblycephala, Tilapia) were collected in TGR, most of which only existed in the lacustrine zone. The results highlight the importance of freely flowing riverine reaches for conserving native fish in the upper Changjiang River and adaptive management strategies for fisheries in TGR.

关键词： longitudinal gradient impoundment functional groups exotic species dam effects

Continuous-flow synthesis of doped all-inorganic perovskite nanocrystals enabled by a microfluidic reactor for light-emitting diode application

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Science China Materials 2020年第8期63卷 1526-1536页

作者： pengcheng lin Hongbin Chen Zhan Wei Yingru lin Jinghui lin Ying Chen Zhengdong Cheng Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter School of Materials and EnergyGuangdong University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China Artie McFerrin Department of Chemical Engineering Texas A&M UniversityCollege StationTexas 77843-3122USA

All-inorganic perovskite nanocrystals(AIPNCs)possess the advantages of narrow emission spectrum,high quantum efficiency of luminescence and tunable luminescence position,which show a broad application prospect in the fields of optoelectronic materials and *** doping can tune their pristine crystal structures and luminescent properties or endow the AIPNCs with additional ***,a microfluidic reactor is designed to produce the Ce3+-doped AIPNCs based on the continuous-flow *** mechanism of the flow synthesis of Ce3+-doped AIPNCs is the efficient physical mixing of the precursor ions in the confined micro-channel,the reaction nucleation of crystal seeds in the poor solvent and the crystal growth of the doped AIPNCs along the flow *** synthesis process can be on-line monitored by an optical fiber absorption spectrometer and an optical fiber fluorescence *** doping concentration of Ce3+can be facilely controlled by changing the flow parameters in the microfluidic reactor,and the highest value reaches 1%.The Ce3+doping can improve the photoluminescence efficiency and the stability of the *** Ce3+-doped CsPbBr3AIPNCs can be used to manufacture green light-emitting diodes(LEDs)with a high color purity of93.3%and white LEDs with correlated color temperature(CCT)of 10,436 K,CIE color coordinates of(0.261,0.317)and color-rendering index(CRI)of *** continuous and controllable synthesis of AIPNCs by microfluidic reactor opens up new avenues for the application of the high-performance optoelectronic materials and devices.

关键词： all-inorganic perovskite nanocrystals microfluidics ion doping light-emitting diode

Colletodiphenol A,a new phenol derivative isolated from the endophytic fungus Colletotrichum capsici

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Asian Journal of Traditional Medicines 2021年第4期16卷 210-215页

作者： Guiyang Xia Yanbin Sun Yuzhuo Wu Huan Xia pengcheng lin Sheng lin Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing Dongzhimen HospitalBeijing University of Chinese MedicineBeijing 100700China State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China College of Pharmaceutical Sciences Qinghai university for nationalitiesXining 810000People’s Republic of China

A new C_(6)-C_(2)dimer phenol derivative,colletodiphenol A(1),along with two known C_(6)-C_(2)phenol derivatives(2,3)were isolated from the endophytic fungus Colletotrichum capsici related to the traditional Chinese medicine Paeonia *** structures were elucidated based on extensive spectroscopic data analysis,including HRESIMS,UV,IR,1D and 2D *** antioxidant and anti-inflammatory activities of the isolated compounds were evaluated,but none of them displayed significant activity.

关键词： Endophytic fungi Colletotrichum capsici Paeonia lactiflora Pall. phenols secondary metabolites

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热冲击下轴向运动FGM梁的自由振动分析

振动与冲击 2020年第12期39卷 249-256页

作者：林鹏程滕兆春兰州理工大学理学院兰州730050

基于Timoshenko梁理论研究两端夹紧、一端夹紧一端简支、两端简支三种不同边界条件下的轴向运动功能梯度材料(FGM)梁在热冲击载荷作用下的自由振动响应。利用Hamilton原理推导热冲击下轴向运动FGM梁的自由振动控制微分方程,并采用分离... 详细信息

基于Timoshenko梁理论研究两端夹紧、一端夹紧一端简支、两端简支三种不同边界条件下的轴向运动功能梯度材料(FGM)梁在热冲击载荷作用下的自由振动响应。利用Hamilton原理推导热冲击下轴向运动FGM梁的自由振动控制微分方程,并采用分离变量法求解一维热传导方程。通过微分求积法(DQM)在梁的长度方向进行离散,将原方程转化为四阶广义特征值问题,求解FGM梁自由振动的无量纲固有频率并进行特性分析。考虑了不同热冲击载荷,不同梯度指数和不同轴向运动无量纲速度对FGM梁自振频率的影响。结果表明:热冲击载荷越大,对降低FGM梁的固有频率的效果越明显;在轴向运动速度和热流输入不改变的情况下,逐渐增大材料梯度指数会使FGM梁的固有频率随之减小;FGM梁对热冲击短时间内有减缓作用,相对于均匀材料一阶失稳所需时间更长,受到热冲击的FGM梁在轴向运动时也更快达到失稳状态。

关键词：轴向运动功能梯度材料 Timoshenko梁热冲击自由振动微分求积法(DQM)

Narrow-bandgap light-absorbing conjugated polybenzobisthiazole:Massive interfacial synthesis,robust solar-thermal evaporation and thermoelectric power generation

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Science China Materials 2022年第9期65卷 2491-2501页

作者： Xi Zhao Zhifeng He Wentao Ou pengcheng lin Yingying Chen Ying Chen Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China

Exploiting advanced light-absorbing conjugated polymers is of great significance to achieve the blue dream of low-energy solar steam generation and clean water ***,an interfacial chemistry strategy is developed to massively synthetize conjugated polybenzobisthiazole(CP)microspheres with a narrow bandgap of 0.274 eV and high solar absorbance of 94.0%.The CP microspheres are combined with the polyvinyl alcohol(PVA)hydrogel to form a Janus *** evaporation rate and energy efficiency of the CP@PVA solar evaporator reach 2.96 kg m^(-2) h^(-1) and 98.8%with a low coating content of 5 mg cm^(-2).The evaporation performance of the Janus CP@PVA evaporator is applicable to seawater,sewage,and acid/alkali *** efficient evaporator with portable collector can be simply assembled to produce drinking water from real seawater and ***,the Janus evaporator is also equipped with a thermoelectric module to generate the steam and electricity *** power output achieves 1.04 W m^(-2 )in real seawater while the evaporation rate remains 2.23 kg m^(-2) h^(-1) under 1 sun,demonstrating the remarkable capacity to utilize the solar energy.

关键词： interfacial chemistry conjugated polymer solarthermal evaporation clean water production salt resistance

HPLC测定藏药麻花艽地上部位5种有效成分的含量

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中国中药杂志 2010年第10期35卷 1276-1279页

作者：聂颖杰林鹏程青海民族大学化学与生命科学学院青海西宁810000

目的:建立藏药麻花艽地上部位5种有效成分的含量测定方法。方法:采用Hypersil ODS柱(4.6 mm×250 mm,5μm),流动相以甲醇(A)-0.02%磷酸水溶液(B)梯度洗脱。0～10 min,以20%A洗脱,10～30 min,从20%A线性变化至50%A。流速1 ***-1,柱温35℃... 详细信息

目的:建立藏药麻花艽地上部位5种有效成分的含量测定方法。方法:采用Hypersil ODS柱(4.6 mm×250 mm,5μm),流动相以甲醇(A)-0.02%磷酸水溶液(B)梯度洗脱。0～10 min,以20%A洗脱,10～30 min,从20%A线性变化至50%A。流速1 ***-1,柱温35℃,检测波长254 nm。结果:5种有效成分均达到基线分离,各成分相关系数及范围分别是落干酸r=0.999 9,0.364～2.18μg;獐牙菜苦苷r=0.999 9,0.275～1.65μg;龙胆苦苷r=0.999 9,0.614～3.68μg;獐牙菜苷r=0.999 9,0.065 6～0.394μg;异荭草素r=0.999 9,0.089 9～0.539μg。5种有效成分中落干酸和龙胆苦苷远较其他3种成分的含量高,达到总含量的60%以上。结论:方法快速、灵敏、准确,可靠,重复性好,可用于藏药麻花艽地上部位药材的质量控制。

关键词：麻花艽落干酸獐芽菜苦苷龙胆苦苷獐芽菜苷异荭草素 HPLC

NPCl-CDs/Fe^(3+)荧光探针的制备及对L-Cys的传感检测

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高等学校化学学报 2024年第9期45卷 36-45页

作者：徐小花王莉林鹏程马天锋石琳王欢芦永昌青海省现代藏医药创制工程技术研究中心青海民族大学药学院西宁810007

以葡萄糖、乙二胺、浓盐酸和浓磷酸作为反应前体,采用一步水热法合成了一种蓝绿色的荧光碳点NPCl-CDs,并以此构建了NPCl-CDs/Fe^(3+)荧光探针用于实际样品中L-半胱氨酸(L-Cys)的定量检测.实验结果表明,在NPCl-CDs中加入Fe^(3+)可使NPCl-... 详细信息

以葡萄糖、乙二胺、浓盐酸和浓磷酸作为反应前体,采用一步水热法合成了一种蓝绿色的荧光碳点NPCl-CDs,并以此构建了NPCl-CDs/Fe^(3+)荧光探针用于实际样品中L-半胱氨酸(L-Cys)的定量检测.实验结果表明,在NPCl-CDs中加入Fe^(3+)可使NPCl-CDs的荧光猝灭,当向NPCl-CDs/Fe^(3+)猝灭体系中引入L-Cys时,体系的荧光强度得以恢复.由此构建了一种用于L-Cys定量检测的新型“开-关-开”NPCl-CDs/Fe^(3+)-L-Cys荧光传感系统.该方法在5.8~60.0μmol/L浓度范围内呈现较宽的线性区域,检出限为0.052μmol/L.该荧光传感系统对L-Cys表现出良好的选择性,对实际样品中L-Cys的检测具有潜在的应用价值.

关键词： NPCl-CDs Fe^(3+) L-半胱氨酸荧光传感

Comparison of EGFR Mutation Status in Tissue and Plasma Cell-free DNA Detected by ARMS in Advanced Lung Adenocarcinoma Patients

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Comparison of EGFR Mutation Status in Tissue and Plasma Cell...