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Comparable water use of two contrasting riparian forests in the lower Heihe River basin, Northwest China

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Journal of Forestry Research 2018年第5期29卷 1215-1224页

作者： Tengfei Yu Qi Feng Jianhua Si Xiaoyou Zhang Haiyang Xi chunyan zhao Alxa Desert Eco-hydrology Experimental Research Station Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences Lanzhou 730000 China Key Laboratory of Eco-hydrology of Inland River Basin Chinese Academy of Sciences Lanzhou 730000 China Gansu Hydrology and Water Resources Engineering Research Center Lanzhou 730000 China

Understanding forest ecosystem evapotranspiration（ET） is crucial for water-limited environments,particularly those that lack adequate quantified data such as the lower Heihe River basin of northwest China which is primarily dominated by Tamarix ramosissima *** Populus euphratica ***,we selected the growing season for 2 years （2012 and 2014） of two such forests under similar meteorological conditions to compare ET using the eddy covariance（EC） *** the growing seasons,daily ET of *** ranged from 0.3 to 8.0 mm day^（-1） with a mean of 3.6 mm day^（-1）,and daily ET of *** ranged from 0.9 to 7.9 mm day^（-1） with a mean of 4.6 mm day^（-1） for a total of 548 and 707 mm,*** significantly higher ET of the *** stand was directly linked to high soil evaporation rates under sufficient water availability from *** the soil evaporation was disregarded,water use was comparable to two contrasting riparian forests,a *** forest with a total transpiration of 465 mm and a *** forest with 473 *** analysis demonstrated that climate factors accounted for at least 80% of ET variation in both forest *** conclusion,water use of the riparian forests was low and comparable in this arid region,that suggest the long-term plant adaptation to the local climate and conditions of water availability.

关键词： Eddy covariance Evapotranspiration Heihe River basin Riparian forest

Osteoblast Behavior on Hierarchical Micro-/Nano-Structured Titanium Surface

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Journal of Bionic Engineering 2011年第3期8卷 234-241页

作者： Weiyan Meng Yanmin Zhou Yanjing Zhang Qing Cai Liming Yang Jinghui zhao chunyan Li School of Stomatology Jilin University Changchun 130021 P. R. China

In the present work, osteoblast behavior on a hierarchical micro-/nano-structured titanium surface was investigated. A hi- erarchical hybrid micro-/nano-structured titanium surface topography was produced via Electrolytic Etching （EE）. MG-63 cells were cultured on disks for 2 h to 7 days. The osteoblast response to the hierarchical hybrid micro-/nano-structured titanium surface was evaluated through the osteoblast cell morphology, attachment and proliferation. For comparison, MG-63 cells were also cultured on Sandblasted and Acid-etched （SEA） as well as Machined （M） surfaces respectively. The results show signifi- cant differences in the adhesion rates and proliferation levels of MG-63 cells on EE, SLA, and M surfaces. Both adhesion rate and proliferation level on EE surface are higher than those on SLA and M surfaces. Therefore, we may expect that, comparing with SLA and M surfaces, bone growth on EE surface could be accelerated and bone formation could be promoted at an early stage, which could be applied in the clinical practices for immediate and early-stage loadings.

关键词： dental implant osteoblast hierarchical micro-/nano-structure surface treatment electrolytic etching

Nighttime transpiration of Populus euphratica during different phenophases

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Journal of Forestry Research 2019年第2期30卷 435-444页

作者： chunyan zhao Jianhua Si Qi Feng Tengfei Yu Peidu Li Michael A.Forster Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Ecohydrology of Inland River Basin Chinese Academy of Sciences School of Agriculture and Food Science The University of Queensland

Evidence exists of nighttime transpiration and its potential impact on plant/water relations for species in a diversity of ecosystems. However, relevant data related to typical desert riparian forest species remains limited Accordingly, we measured sap flow velocity of Populus euphratica using the heat ratio method between 2012 and2014. Nocturnal stem sap flow was separated into nighttime and stem refilling using the ‘‘forecasted refilling''method. Nighttime transpiration was observed for each phenophase. The highest value was during the full foliation period but lowest during leaf expansion and defoliation periods. The contribution of nighttime transpiration to daytime transpiration was an average of 15% but this was comparatively higher during the defoliation period. Relationships between nighttime transpiration, vapor pressure deficits, and air temperatures were more closely associated than with wind speed in all phenophases. Moreover, we found that nighttime transpiration linearly correlated to vapour pressure deficit during the first and the full foliation periods, but nighttime transpiration showed exponential correlations to air temperatures during the same phenophases. Additionally, environmental drivers of transpiration were significantly different between nighttime and daytime(P \ 0.05). Driving forces behind nighttime transpiration were characterized by many factors, and integrated impacts between these multiple environmental factors were complex. Future studies should focus on these integrated impacts on nighttime transpiration, and the physiological mechanisms of nighttime transpiration should be investigated, given that this could also influence its occurrence and magnitude during different phenophases.

关键词： Sap flow Nighttime transpiration Phenophase Heat ratio method Populus euphratica

Printable SnO2 cathode interlayer with up to 500 nm thickness-tolerance for high-performance and large-area organic solar cells

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Science China Chemistry 2020年第7期63卷 957-965页

作者： Yiming Bai chunyan zhao Shuai Zhang Shaoqing Zhang Runnan Yu Jianhui Hou Zhan’ao Tan Yongfang Li State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China

The printable electrode interlayer with excellent thickness tolerance is crucial for mass production of organic solar cells(OSCs)by solution-based print techniques. Herein, high-quality printable SnO2 films are simply fabricated by spin-coating or bladecoating the chemical precipitated SnO2 colloid precursor with post thermal annealing treatment. The SnO2 films possess outstanding optical and electrical properties, especially extreme thickness-insensitivity. The interfacial electron trap density of SnO2 cathode interlayers(CILs) are very low and show negligible increase as the thicknesses increase from 10 to 160 nm,resulting in slight change of the power conversion efficiencies(PCEs) of the PM6:Y6 based OSCs from 16.10% to 13.07%. For blade-coated SnO2 CIL, the PCE remains high up to 12.08% even the thickness of SnO2 CIL is high up to 530 nm. More strikingly, the large-area OSCs of 100 mm2 with printed SnO2 CILs obtain a high efficiency of 12.74%. To the best of our knowledge, this work presents the first example for the high-performance and large-area OSCs with the thickness-insensitive SnO2 CIL.

关键词： organic solar cells printable Sn02 cathode interlayer thickness-insensitivity large-area

The thermal transformation mechanism of chlorinated paraffins:An experimental and density functional theory study

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Journal of Environmental Sciences 2019年第1期31卷 378-387页

作者： Shanzhi Xin Wei Gao DANDan Cao Kun Lv Yaquan Liu chunyan zhao Yawei Wang Guibin Jiang State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Hubei Key Laboratory of Industrial Fume and Dust Pollution Control Jianghan University University of Chinese Academy of Sciences Environment Research Institute Shandong University School of Pharmacy Lanzhou University Institute of Environment and Health Jianghan University

The increasing production and usage of chlorinated paraffins(CPs) correspondently increase the amount of CPs that experience thermal processes. Our previous study revealed that a significant amount of medium-chain chlorinated paraffins(MCCPs), short-chain chlorinated paraffins(SCCPs) as well as aromatic and chlorinated polycyclic aromatic hydrocarbons(Cl-PAHs) were formed synergistically during the thermal decomposition of CP-52(a class of CP products).However, the transformation mechanisms of CP-52 to these compounds are still not very *** article presents a mechanistic analysis on the decomposition of CP-52 experimentally and theoretically. It was found that CP-52 initially undergoes dehydrochlorination and carbon chain cleavage and it transformed into chlorinated and unsaturated hydrocarbons. Cyclization and aromatization were the most accessible pathways at low temperatures(200–400°C), both of which produce mostly aromatic hydrocarbons. As the temperature exceeds 400°C, the hydrocarbons could decompose into small molecules, and the subsequent radical-induced reactions become the predominant pathways, leading to the formation of Cl-PAHs. The decomposition of CP-52 was investigated by using density functional theory and calculations demonstrating the feasibility and rationality of PCB and PCN formation from chlorobenzene. The results improve the understanding of the transformation processes from CP-52 to SCCPs and Cl-PAHs as well as provide data for reducing their emissions during thermal-related processes.

关键词： Decomposition mechanism Chlorinated paraffins Chlorinated aromatic hydrocarbons Density functional theory (DFT)

Changes of melatonin and its receptors in synchronizing turbot(Scophthalmus maximus)seasonal reproduction and maturation rhythm

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Acta Oceanologica Sinica 2022年第1期41卷 84-98页

作者： chunyan zhao Shihong Xu Yifan Liu Chengcheng Feng Yongshuang Xiao Yanfeng Wang Qinghua Liu Jun Li School of Marine Science and Engineering Qingdao Agricultural UniversityQingdao 266109China Key Laboratory of Experimental Marine Biology Centre for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Marine Biology and Biotechnology Laboratory Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

In most fish,reproduction is seasonal or periodic under the suitable *** turbot(Scophthalmus maximus)farms,one of the most economically important marine flatfish species,changes in daylength could cause changes in the spawning *** this study,to characterize the regulation of reproductive physiology following light signals,three melatonin receptors(Mtnr)investigated in turbot were named sm Mtnr1,sm Mtnr2,and sm Mtnr1 *** expression profiles demonstrated that Mtnr m RNAs were concentrated in the brain(as detected in the hypothalamus(Hy)and mesencephalon(Me)),gonad and *** most abundant Mtnr1 and Mtnr2 m RNA expression levels were detected in the central nervous system at the beginning of the breeding season,suggesting that Mtnr1 and Mtnr2 may play vital roles in the regulation of turbot gonadal *** addition,the melatonin profiles gradually increased and reached to the highest level at the spawning stage,indicating that melatonin is a potent hormone in the regulation of fish oocyte growth and *** results of this study suggested that melatonin is the primary factor that transduces the light signal and regulates the physiological functions of turbot seasonal ***,the results of this study may establish a foundation for further research seeking to identify fish melatonin receptors involved in the gonadal development and gamete maturation.

关键词： turbot brain melatonin melatonin receptors seasonal reproductive development

Morphological and histological changes in the brains of turbot(Scophthalmus maximus)with gonadal development

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Acta Oceanologica Sinica 2022年第12期41卷 115-122页

作者： chunyan zhao Liang Chi Yongshuang Xiao Bing Li Yunliang Lu Yanting Cui Wenqi Wang Jun Li School of Marine Science and Engineering Qingdao Agricultural UniversityQingdao 266109China College of Veterinary Medicine Qingdao Agricultural UniversityQingdao 266109China CAS Key Laboratory of Experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Marine Biology and Biotechnology Laboratory Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

The brain plays a critical role in controlling reproduction through the hypothalamus-pituitary-gonadal(HPG)axis in ***(Scophthalmus maximus)has become an economically important marine fish in Europe and North *** research investigating turbot reproduction has focused on the role of the HPG axis in regulating egg and sperm ***,the morphology and histology of the organs in the HPG axis have not been *** this study,we investigated the morphology and histology of brains in female and male turbot at different stages of gonadal *** results showed that the brains of both female and male turbot were composed of seven parts that are typical of advanced teleosts:the telencephalon,diencephalon,cerebellum,hypothalamus,pituitary gland,myelencephalon,and olfactory *** telencephalon was well-developed and contained five distinct lobes,with the contiguous diencephalon at the caudal *** torus longitudinales and rostral torus semicircularis of the mesencephalon flattened along the dorsal surface,and the rostral corpus cerebellum was located in the dorsal *** actual total brain volume in mature males was significantly greater(p<0.05)than that of females with gonadal ***,the pituitary volume in male turbot significantly increased(p<0.05)from immature to mature stage,but this difference did not occur in *** data together illustrate a distinct sex difference in the turbot brain during gonadal development,providing insight into their HPG axes.

关键词： turbot brain pituitary gonadal development morphology histology

Ecophysiological responses to drought stress in Populus euphratica

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Research in Cold and Arid Regions 2021年第4期13卷 326-336页

作者： chunyan zhao JianHua Si Qi Feng TengFei Yu Huan Luo Jie Qin Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhouGansu 730000China Key Laboratory of Ecohydrology of Inland River Basin Chinese Academy of SciencesLanzhou Gansu 730000China University of Chinese Academy of Sciences Beijing 100049China

Ecophysiological responses to drought stress of Populus euphratica in Alashan Desert Eco-hydrology Experimental Research Station were *** show that under mild and moderate drought stress,stomatal length,aperture,area and density is likely to decrease in the early days,but afterwards this is likely to recovery with treatment over the pas‐sage of treatment *** severe drought stress,these properties appear to decline ***,after 45 days of drought-stress treatment,the decline is not as noticeable as before,indicating that Populus euphratica could possibly reduce water evaporation by shutting down the stoma,leading to an improvement in its water use efficiency with better survival under drought stress *** leaf area first decreases,and then increases under mild and moderate drought stress conditions,with the average values under different degree of stress found to be approximately 129.52,120.08,116.63 and 107.28 cm2,*** moderate stress conditions,the leaf water potential appears to show a continuous decline where the average values under different degree of stress are found to be-1.27,-1.85,-4.29 and-4.80 MPa,*** terms of proline content,the results demonstrate that this factor appears to increase significant‐ly under moderate and severe drought stress *** under severe drought stress condition,the content is found to be more than 700μg/*** over average values of 14.64 and 15.90 nmol/g under moderate and severe drought stress,respectively,Malondialdehyde content is found to increase quite rapidly under moderate and severe drought stress conditions at first,which then appears to decrease gradually with the treatment over time.

关键词： stomatal morphology drought stress Malondialdehyde proline Populus euphratica

Evaluation of the physiochemical and metabolite of different region coffee beans by using UHPLC-QE-MS untargeted-metabonomics approaches

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Food Bioscience 2022年第2期46卷 413-422页

作者： Yue Miao Qingfei Zou Qiuping Wang Jiashun Gong Chao Tan Chunxiu Peng chunyan zhao Zelin Li College of Food Science and Technology Yunnan Agricultural UniversityKunmingYunnan650201China College of Horticulture and Landscape Yunnan Agricultural UniversityKunming650201China Yunnan Yunce Quality Testing Co. LtdKunming650217China

Coffee is one of the most important agricultural commodities and has the unique organoleptic characteristics such as strong but not bitter taste,fragrant,oily,and *** this study,an untargeted metabolomics approach based on UHPLC-QE-MS was used to investigate the differences in terms of components of precursor metabolites in coffee beans from 18 producing regions *** analysis,principal component analysis and hierarchical clustering analysis revealed a neat separation among coffee *** with high relevance to variance in the projection values in supervised multivariate analysis were selected as important metabolites for the discrimination of coffee *** total,10 different families of compounds were considered as potential markers of the coffee beans:3-hydroxycoumarin,4,5-di-O-caffeoylquinic,cryptochlorogenic acid,palmitic amide,linoleamide,arachidic acid,petroselinic acid,trehalose,L-glutamic acid,L-malic *** findings presented herein serve as a suitable framework for the design of novel discrimination strategies in food origin tracing.

关键词： Fingerprint analysis OPLS-DA PCA Green coffee beans Characteristic metabolites