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Influence of physiological and environmental factors on the diurnal variation in emissions of biogenic volatile compounds from Pinus tabuliformis

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Journal of Environmental Sciences 2019年第7期31卷 102-118页

作者： Jungang Chen Huaxing Bi Xinxiao Yu Yanlin Fu Wenchao Liao College of Soil and Water Conservation Beijing Forestry University Institute of Ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University Ji County Station Chinese National Ecosystem Research Network (CNERN) Key Laboratory of State Forestry Administration on Soil and Water Conservation Beijing Forestry University Beijing Engineering Research Center of Soil and Water Conservation Beijing Forestry University Engineering Research Center of Forestry Ecological Engineering Ministry of Education Beijing Forestry University Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees Beijing Water Consulting Co. LTD

Biological volatile organic compounds(BVOCs) have a large influence on atmospheric environmental quality, climate change and the carbon cycle. This study assesses the composition and diurnal variation in emission rates of BVOCs from Pinus tabuliformis, using an enclosure technique. Environmental parameters(temperature and light intensity) and physiological parameters(net photosynthetic rate, P_n; stomatal conductance, g_s; intercellular CO_2 concentration, C_i; and transpiration rate, T_r) that may affect emission behavior were continuously monitored. The 10 most abundant compound groups emitted by P. tabuliformis were classified by gas chromatography–mass spectrometry. The dominant monoterpenoid compounds emitted were α-pinene, β-myrcene, α-farnesene and limonene. The diurnal emission rate of BVOCs changed with temperature and light intensity, with dynamic analysis of BVOCs emissions revealing that their emission rates were more affected by temperature than light. The variation in monoterpene emission rates was consistent with estimates of P_n, g_s and T_r. Basal emission rates(at 30 °C,) of the main BVOCs ranged from 0.006 to 0.273 μg^(-1)/(hr g),while the basal ER standardization coefficients ranged from 0.049 to 0.144 °C^(-1). Overall, these results provide a detailed reference for the effective selection and configuration of tree species to effectively prevent and control atmospheric pollution.

关键词： Biogenic volatile organic compounds Pinus tabuliformis Emission rate Monoterpenes

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Decolorization of azo dyes by a salt-tolerant Staphylococcus cohnii strain isolated from textile wastewater

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Frontiers of Environmental Science & Engineering 2012年第6期6卷 806-814页

作者： Bin YAN Cuihong DU Meilan XU Wenchao Liao Department of Environmental Engineering Xiamen University of TechnologyXiamen 361024China School of Biotechnology Engineering Jimei UniversityXiamen 361021China

The salt-tolerant Staphylococcus cohnii strain, isolated from textile wastewater, has been found effective on decolorizing several kinds of azo dyes with different structures. The optimal conditions for azo dye acid red B （ARB） decolorization by S. cohnii were determined to be pH= 7.0 and 30℃. The decolorization efficiency increased with the increase of the salinity concentration, and around 90% of ARB （100mg.L-1） could be decolorized in 24 h when the salinity concentration was up to 50 g-L 1. Moreover, the strain could still decolorize 19% of ARB in 24 h even when the NaC1 concentration was increased to 150 g. L1. Meanwhile, the dependence of the specific decolorization rate by S. cohnii on the ARB concentration could be described with Michaelis-Menten kinetics （Kin = 585.7mg·L-1, Vmax = t09.8mg-g cell ·h ^-1）. The addition of quinone redox mediator, named 2-hydroxy-l,4-naphthoquinone and anthraqui- none-2,6-disulfonate, significantly accelerated the deco- lorization performance ofS. cohnii. Furtherly, the activities of azoreductase （0.55 μmol.mg protein^-1.min-1） and Nicotineamide adenine dinucleotide-dichlorophenol indophenol （NADH-DCIP） reductase （8.9μmol.mg proteinl.min-1） have been observed in the crude cell extracts of S. cohnii. The decolorization products of ARB were analyzed by HPLC-MS, and the results indicated the reductive pathway was responsible for azo dye decoloriza- tion by S. cohnii.

关键词： Staphylococcus cohnii decolorization salt,azoreductase Nicotineamide adenine dinucleotide-dichlor-ophenol indophenol （NADH-DCIP） reductase

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Tailored architecture of composite electrolyte for all-solid-state sodium batteries with superior rate performance and cycle life

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Nano Research 2024年第5期17卷 4171-4180页

作者： Xiang Guan Zhenhua Jian Xingan liao Wenchao Liao Yanfei Huang Dazhu Chen Robert K.Y.Li Chen Liu Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518055China Department of Materials Science and Engineering City University of Hong KongHong KongChina

Seeking for composite electrolytes reinforced all-solid-state sodium ion batteries with superior long lifespan and rate performance remains a great challenge.Here,a unique strategy to tailor the architecture of composite electrolyte via inserting polymer chains into a small quantity of sulfate sodium grafted C_(48)0H_(28)O_(32)Zr_(6)(UIOSNa)is proposed.The intimate contact between polymer segments and UIOSNa with limited pore size facilitates the anion immobilization of sodium salts and reduction of polymer crystallinity,thereby providing rapid ion conduction and reducing the adverse effect caused by the immigration of anions.The tNa+grafting of-SO_(3)Na groups on fillers allows the free movement of more sodium ions to further improve and ionic conductivity.Consequently,even with the low content of UIOSNa fillers,a high ionic conductivity of 6.62×10^(-4) S·cm^(-1) at 60℃ and a transference number of 0.67 for the special designed composite electrolyte are achieved.The assembled all-solid-state sodium cell exhibits a remarkable rate performance for 500 cycles with 95.96%capacity retention at a high current rate of 4 C.The corresponding pouch cell can stably work for 1000 cycles with 97.03%capacity retention at 1 C,which is superior to most of the reported composite electrolytes in the literature.

关键词： solid state sodium battery composite electrolyte rate performance cycle life

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AUTOMATED ASSESSMENT OF EPIDERMAL THICKNESS AND VASCULAR DENSITY OF PORT WINE STAINS OCT IMAGE

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Journal of Innovative Optical Health Sciences 2014年第1期7卷 45-51页

作者： CHENGMING WANG TIANCHENG HUO JING-GAO ZHENG NING ZHANG TIANYUAN CHEN Wenchao Liao YING WANG YING GU PING XUE Department of Physics and State Key Laboratory of Low-dimensional Quantum Physics Tsinghua University Beijing 100084P.R.China Department of Laser Medicine Chinese PLA General Hospital Beijing 100853P.R.China

Optical coherence tomography(OCT)enables in vivo imaging of port wine stains(PWS)lesions.The knowledge of vascular struct ure and epidermal thickness(ET)of PWS may aid the objectivediagnosis and optimal treatment.To obtain the structural parameters more rapidly and avoiduser intervention,an automated algorithm of energy map is introduced based on intensity andedge information to extract the skin surface using dynamic programming method.Subsequently,an averaged A-scan analysis is performed to obtain the mean ET and the relative intensity ofdermis indicating the corresponding vascular density.This approach is currently successfullyapplied in clinical diagnosis and shows promising guidance and assessment of PDT treatment.

关键词： Optical coherence tomography port wine stains epidermal thickness image proces.sing photodynamic therapy

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Multi-frame speckle reduction in OCT using supercontinuum pumped by noise-like pulses

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Journal of Innovative Optical Health Sciences 2019年第2期12卷 86-92页

作者： Chengming Wang Yi-Jing You Shengnan Ai Wenxin Zhang Wenchao Liao Xiao Zhang Juicheng Hsieh Ning Zhang Bihua Tang Ci-Ling Pan Ping Xue State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics Tsinghua University Collaborative Innovation Center of Quantum Matter BeijingP.R.China Department of Physics National Tsing Hua University No.101Sec.2Kuang-Fu RdHsinchuTaiwan Department of Physics and Institute of Photonics Technologies National Tsing Hua University Taiwan School of Life Science Beijing Institute of Technology BeijingP.R.China Institute of Forensic Science Ministry of Public Security Beijing P.R.China Southwest Medical University Luzhou Sichuan ProvinceP.R.China Nuctech Company Limited BeijingP.R.China

In most coherent imaging modality,speckle noise is a major cause that blurs the boundary of tissues and degrades the image contrast.By utilizing the unique properties of supercontinuum(SC)generated by noise-like pulses(NLPs)and a simple multi-frame averaging technique,we achieved significant speckle reduction in spectral domain optical coherence tomography(SD-OCT).We quantitatively compared the speckle of our proposed method with those of conventional swept source OCT(SS-OCT)and SD-OCT based on commercial light sources.The experimental results show that SC pumped by NLPs combined with noncoherent averaging method achieves better denoising performance in terms of contrast to noise ratio(CNR).

关键词： Noise-like pulses supercontinuum generation speckle reduction optical coherence tomography

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Altitudinal Variation in Digestive Tract Length in Yunnan Pond Frog (Pelophylax pleuraden)

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Asian Herpetological Research 2013年第4期4卷 263-267页

作者： Shangling LOU Yanhong LI Long JIN Zhiping MI wenchao LIU Wenbo liao Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education) China West Normal University Institute of Rare Animals and Plants College of Life Sciences China West Normal University

The digestive tract plays an important role in digestion and the acquisition of food energy. Understanding the impact of abiotic environments on digestive tract morphology is especially important for evolution of digestive tract across different environments. Here, we investigated altitudinal variation in digestive tract length in the Yunnan Pond Frog （Pelophylaxpleuraden） across five populations ranging from 1413 m to 1935 m a.s.1, in Ningnan County, Sichuan province in western China. Frogs were collected during the breeding season, from 1-5 June 2012. Our results revealed that females had longer digestive tract and relative digestive tract （i.e. digestive tract length / body size） lengths in com- parison to males, on average, but the differences between them decreased with increasing altitude. Digestive tract and relative digestive tract lengths increased with increasing altitude suggesting that a higher proportion of indigestible ma- terials may be consumed at high-altitude sites and result in a relative increase in digestive tract dimensions.

关键词： altitudinal gradient digestive tract Pelophylax pleuraden Ningnan county

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氨基磺酸溶液浸出废锂离子电池负极活性材料中的锂

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化工环保 2018年第2期38卷 236-241页

作者：程前廖文超厦门理工学院环境科学与工程学院福建厦门361024

随着锂离子电池的广泛应用,产生了大量废锂离子电池,其负极活性材料中积累了高品位的锂。锂作为一种稀有金属,对其进行回收利用很有意义。选取了无毒、稳定性好的氨基磺酸作为浸出剂,浸取废锂离子电池负极活性材料中的锂,考察了预处理... 详细信息

随着锂离子电池的广泛应用,产生了大量废锂离子电池,其负极活性材料中积累了高品位的锂。锂作为一种稀有金属,对其进行回收利用很有意义。选取了无毒、稳定性好的氨基磺酸作为浸出剂,浸取废锂离子电池负极活性材料中的锂,考察了预处理方式对负极活性材料成分和结构的影响以及浸出条件对锂浸出率的影响。结果表明:600℃下煅烧4 h,可完全去除附着在负极活性材料表面的有机物;在氨基磺酸浓度0.75 mol/L、固液比5 g/L、浸出温度40℃、浸出时间45 min的最佳浸出条件下,负极活性材料中锂浸出率达97.2%。

关键词：废锂离子电池负极活性材料氨基磺酸锂浸出

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步进电动机微步驱动技术进展研究

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微特电机 2022年第12期50卷 63-67页

作者：廖驹马文超中科芯集成电路有限公司无锡214072

混合式步进电动机通过微步驱动技术实现了更小的步进角度,转动时更加平稳,改善了动态响应能力,提高了系统的控制精度和稳定性。实现微步的驱动电路系统,需要解决高细分时正余弦电流控制、电流衰减控制以及步进速率控制等关键问题,不同... 详细信息

混合式步进电动机通过微步驱动技术实现了更小的步进角度,转动时更加平稳,改善了动态响应能力,提高了系统的控制精度和稳定性。实现微步的驱动电路系统,需要解决高细分时正余弦电流控制、电流衰减控制以及步进速率控制等关键问题,不同功能集成度的芯片给微步驱动系统的设计带来不一样的驱动性能和调优难度。对步进电动机的微步原理、驱动系统主要功能模块、典型技术实现方案以及更全功能集成芯片的分析研究,为开发更高性能和经济性的微步驱动系统提供参考。

关键词：混合式步进电动机微步驱动电流衰减步进速率控制

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左西孟旦治疗心力衰竭患者的研究进展

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药品评价 2021年第21期18卷 1342-1344页

作者：廖文超天津市西青医院天津300000

心力衰竭(CFR)是多种心血管疾病进展至终末期的表现,亦为大部分器质性心脏病发展到最后的表现,该病致死率常年居高不下,给患者生命安全造成威胁。CFR发病机制较繁杂,多与心肌损伤、心室重构、血流动力学异常等因素有关。目前,传统治疗... 详细信息

心力衰竭(CFR)是多种心血管疾病进展至终末期的表现,亦为大部分器质性心脏病发展到最后的表现,该病致死率常年居高不下,给患者生命安全造成威胁。CFR发病机制较繁杂,多与心肌损伤、心室重构、血流动力学异常等因素有关。目前,传统治疗中的正性肌力药物存有影响心肌扩张、增加心肌耗氧量等不良状况,在临床应用中较为受限。随着钙离子增敏剂——左西孟旦的出现,该药物满足临床急切改善心衰症状、不增加耗氧量、稳定血流动力学异常等相关需求,且已通过多项临床试验证明其安全性与疗效。现就左西孟旦治疗CFR患者的临床应用进行综述。

关键词：心力衰竭左西孟旦心室重构血流动力学

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Preparation of bilayer/three-layer PEO-carbon nanotube composite thin films and their toluene-sensing application

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Science China(Technological Sciences) 2013年第5期56卷 1124-1128页

作者： TAI HuiLing liao Jian DAN wenchao DUAN ChengLi LI Xian State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic InformationUniversity of Electronic Science and Technology of China(UESTC)

The bilayer poly(ethylene oxide)/multiple-walled carbon nanotubes(PEO/MWCNTs) and three-layer PEO/MWCNTs/PEO composite thin films were fabricated with the spraying process on the interdigitated transducers(IDTs) as gas sensors for toluene-sensing application.Compared with the bilayer thin film sensor,the sensor with three-layer thin films exhibited higher response values and better recovery property.The microstructures of sensing films were characterized by scanning electron microscopy(SEM) to indicate that the better sensing response of three-layer thin films might be ascribed to the sufficient adsorption of toluene molecules on the surfaces of upper and bottom PEO films.The selectivity of the three-layer film sensor was further investigated by comparing responses upon exposure to different interference vapors with the response to toluene exposure,and much higher response was observed in the case of toluene.Good repeatability of the three-layer film sensor was also observed.

关键词：多壁碳纳米管复合薄膜检测应用甲苯制备气体传感器薄膜传感器扫描电子显微镜

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