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Source apportionment of VOCs in a typical medium-sized city in North China Plain and implications on control policy

Journal of Environmental Sciences 2021年第9期33卷 26-37页

作者： Juanjuan qin Xiaobo Wang Yanrong Yang yuanyuan qin Shaoxuan Shi Peihua Xu Rongzhi Chen Xueming Zhou Jihua Tan Xinming Wang College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Faculty of Earth Resources China University of GeosciencesWuhan 430074China Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640China

Characteristics of atmospheric VOCs(volatile organic compounds) have been extensively studied in megacities in China, however, they are scarcely investigated in medium/smallsized cities in North China Plain(NCP).A comprehensive research on possible sources of VOCs was conducted in a medium-sized city of NCP, from May to September 2019.A total of 143 canister samples of 8 sites in Xuchang city were collected, and 57 VOC species were *** average VOC concentrations were 42.6 ± 31.6 μg/m3, with 53.7 ± 31.0 μg/m3 and 32.1 ± 27.8 μg/m^(3), in the morning and afternoon, *** and aromatics contributed 80% of the total ozone formation potential(OFP).Aromatics accounted for more than 95% of secondary organic aerosol potential(SOAP).VOCs were dominated by the local emission with significant transport from the southeast *** analysis extracted 6 sources, which were combustion(33.1%), LPG usage(19.3%), vehicular exhaust & fuel evaporation(15.8%), solvent usage(15.2%), industrial(9.11%) and biogenic(7.51%), respectively and they contributed 33.4%, 17.6%, 12.9%, 18.6%, 9.28% and 8.22% to the OFP, *** and LPG usage were the dominant VOC sources;and combustion, solvent usage and LPG usage were the main sources of OFP in Xuchang city, which were different to megacities in China with a high contribution from vehicular exhaust, solvent usage and industry,suggesting specific control strategies on VOCs need to be implemented in medium-sized city such as Xuchang city.

关键词： Volatile organic compounds Source apportionment Ozone Positive matrix factorization Medium-sized city

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On the 3-rank of tame kernels of certain pure cubic number fields

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Science China Mathematics 2010年第9期53卷 2381-2394页

作者： LI yuanyuan & qin HouRong Department of Mathematics,Nanjing University,Nanjing 210093,China Department of Mathematics Nanjing University Nanjing China

In this paper,we present some explicit formulas for the 3-rank of the tame kernels of certain pure cubic number fields,and give the density results concerning the 3-rank of the tame *** examples are given in Tables 1 ... 详细信息

关键词： the 3-rank of the tame kernels pure cubic fields density

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Identification of a new Hazelnut disease in Liaoning Province:Hazelnut husk brown rot

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BIOCELL 2022年第9期46卷 2145-2149页

作者： JUN SUN MING XIE JIACHEN HAO NAN MAO LIJING CHEN yuanyuan qin Liaoning Institute of Economic Forestry Dalian116031China Shenyang Agricultural University Shenyang110866China Southwest University Chongqing400700China

Hazelnut husk brown rot has been identified as a new disease in Liaoning Province in recent *** objective of this study as to identify the pathogen.[Method]In this study,a standard sample of hazelnut husk brown rot was collected from Songmudao Base in Dalian City,Liaoning *** pathogen was identified by the studies of the morphology,pathogenicity,and analyses of ITS and LSU *** pathogen was isolated and purified,which was confirmed by Koch’s *** symptoms after inoculation were the same as those collected directly from a diseased tree,which showed that it was the pathogenic *** cultural characteristics and conidia and the morphology of the pathogenic fungi were similar to those of Botrytis cinerea’*** ITS sequences and LSU sequences were compared to the associated strain sequences in GenBank,with 100%identity to Botrytis cinerea(GenBank accession number:MN589848.1)and Botrytis cinerea(GenBank accession number:KU140653.1),*** infection status of the pathogen on the hazelnut husks was also *** studies suggested that the pathogen leading to the hazelnut husk brown rot as a new disease in Liaoning Province was Botrytis cinerea.

关键词： Hazelnut husk brown rot Pathogen identification Botrytis cinerea Infection process

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Choline acetyltransferase expressed by radial neuroglia cells in the development of telencephalon: A validated study

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Neural Regeneration Research 2007年第2期2卷 70-73页

作者： Li Zhou Lingling Ding Zhisuo Xiao yuanyuan qin Guibin Li Department of Histology and Embryology Basic Medical College of Jilin University Changchun 130021 Jilin Province China

BACKGROUND： Cholinergic neuron directly participants in human motion, learning and memory and is a target cell for multiple degenerative diseases of central nervous system. OBJECTIVE： To investigate whether the mitotic cell is the radial glial cell expressing choline acetyltransferase （CHAT） in ventricle zone （VZ） of telencephalon and whether cholinergic neuron is derived from radial glial cell in ventricle zone of telencephalon. DESIGN： Observational study. SETTING： Department of Histology and Embryology, Basic Medical College of Jilin University. MATERIALS： Nine healthy Wistar rats included 6 females and 3 male. Male and female rats were mated routinely, and the day when spermatozoa or vaginal plug were found was regarded as embryonic 0 （E0）. Primary monoclonal antibodies ChAT and vimentin were provided respectively by Wuhan Boster Company, and Biogenex Company, USA. METHODS： The experiment was carried out in the Laboratory of Cell Culture and Immunohistochemistry, Department of Histology and Embryology from march 2002 to January 2003. Firstly, fluorescence-activated cell sorting （FACS） was used to confirm the time of generation of cholinergic neuron; secondly, telencephalons of rats at embryonic 14 days （E14） were performed coronary sections, then immunohistochemistry double staining for vimentin （a protein marker of radial neuroglia cell） and ChAT （a protein marker of cholinergic neuron） were used to test whether ChAT was expressed in the radial neuroglia cells. MAIN OUTCOME MEASURES：（1） Fluorescence-activated cell numbers of ChAT in telencephalon; （2） results of immunohistochemistry double staining. RESULTS： It is confirmed using by flow cytometer that embryogenesis time of cholinergic neuron was at E12, and shown the population of cells in VZ of dorsal telencephalon of E14 rat co-expressed vimentin and ChAT through immunohistochemistry double staining. A lot of vimentin-positive cells and ChAT-positive cells respectively were observed in VZ of later

关键词： telencephalon choline o-acetyltransferase vimentin immunohistochemistry

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Evidence for a therapeutic effect of Braintone on ischemic brain damage

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Neural Regeneration Research 2013年第19期8卷 1743-1755页

作者： yuanyuan qin Yu Luo Weiwei Gu Lei Yang Xikun Shen Zhenlun Gu Huiling Zhang Xiumei Gao Department of Pharmacology and Laboratory of Cerebrovascular Pharmacology College of Pharmaceutical Science Suzhou Institute of Chinese Meteria Medica Soochow University Department of Pharmacy Suzhou Hospital of Traditional Chinese Medicine Department of Anesthesiology Xiyuan Hospital China Academy of Chinese Medical Sciences

This study used a novel combination of in vivo and in vitro experiments to show that Braintone had neuroprotective effects and clarified the molecular mechanisms underlying its efficacy. The Chinese herbal extract Braintone is composed of Radix Rhodiolase Essence, Radix Notoginseng Essence, Fofium Ginkgo Essence and Rhizoma Chuanxiong. In vivo experiments showed that cerebral infarction volume was reduced, hemispheric water content decreased, and neurological deficits were alleviated in a rat model of permanent middle cerebral artery occlusion after administration of 87.5, 175 or 350 mg/kg Braintone for 7 consecutive days. Western blot analysis showed that Braintone enhanced the expression of hypoxia-inducible factor la, heme oxygenase-1 and vascular endothe- lial growth factor in the ischemic cortex of these rats. The 350 mg/kg dose of Braintone produced the most dramatic effects. For the in vitro experiments, prior to oxygen-glucose deprivation, rats were intragastrically injected with 440, 880 or 1 760 mg/kg Braintone to prepare a Braintone-co ntaining serum, which was used to pre-treat human umbilical vein endothelial cells for 24 hours. Human umbilical vein endothelial cell injury was alleviated with this pre-treatment. Western blot and real-time PCR analysis showed that the Braintone-containing serum increased the levels of hy- poxia-inducible factor la mRNA and protein, heine oxygenase-1 protein and vascular endothelial growth factor mRNA in oxygen-glucose deprived human umbilical vein endothelial cells. The 1 760 mg/kg dose produced the greatest increases in expression. Collectively, these experimental findings suggest that Braintone has neuroprotective effects on ischemia-induced brain damage via the up-regulation of hypoxia-inducible factor la, heme oxygenase-1 and vascular endothelial growth factor expression in vascular endothelial cells.

关键词： neural regeneration traditional Chinese medicine Braintone ischemic brain damage oxygen-glucosedeprivation endothelial cells hypoxia inducible factor la heme oxygenase-1 vascular endothelial growthfactor grants-supported paper neuroregeneration

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The pyramid representation of the functional network using resting-state fMRI

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Psychoradiology 2022年第3期2卷 100-112页

作者： Zhipeng Yang Luying Li Yaxi Peng yuanyuan qin Muwei Li College of Electronic Engineering Chengdu University of Information TechnologyChengduSichuan 610225China Department of Radiology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430000China Vanderbilt University Institute of Imaging Science Vanderbilt UniversityNashvilleTN 37232USA

Background Resting-state functional magnetic resonance imaging(RS-fMRI)has been proved to be a useful tool to study the brain mechanism in the quest to probe the distinct pattern of inter-region interactions in the *** an important application of RSfMRI,the graph-based approach characterizes the brain as a complex ***,the network is susceptible to its scale that determines the trade-off between sensitivity and anatomical *** To balance sensitivity and anatomical variability,a pyramid representation of the functional network is proposed,which is composed of five individual networks reconstructed at multiple *** The pyramid representation of the functional network was applied to two groups of participants,including patients with Alzheimer’s disease(AD)and normal elderly(NC)individuals,as a *** were extracted from the multi-scale networks andwere evaluated with their inter-group differences between AD andNC,aswell as the discriminative power in recognizing ***,the proposed method was also validated by another dataset from people with *** The different features reflect the highest sensitivity to distinguish AD at different *** addition,the combined features have higher accuracy than any single scale-based *** findings highlight the potential use ofmulti-scale features asmarkers of the disrupted topological organization in AD *** We believe that multi-scale metrics could provide a more comprehensive characterization of the functional network and thus provide a promising solution for representing the underlying functional mechanism in the human brain on a multi-scale basis.

关键词： multi-scale functional network graph theory resting-state fMRI support vector machine Alzheimer’s disease

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Synthesis and properties of binaphthyl chiral thermally activated delayed fluorescence molecules using thioxanthone as acceptor

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Chinese Chemical Letters 2023年第12期34卷 446-451页

作者： Xiangyu Dong Shaogang Shen yuanyuan qin Xiaoxiao Hu Honglei Gao Guanhao Liu Teng Ga Zhi Pang Pengfei Wang Ying Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Chemistry and Chemical Engineering Suzhou UniversitySuzhou 234000China

The currently reported axial chiral molecules based on the 3,3'-substitution of the binaphthyl skeleton are limited by intrinsic fluorescence properties,resulting in generally low device efficiencies(EQE<5%)of related organic light emitting diodes(OLEDs).Herein,we designed and synthesized four pair of chiral binaphthyl enantiomers(R/S-1-R/S-4)adopting acceptor-donor-donor-acceptor(ADDA)structure by introducing different thioxanthone modification groups on the 3,3'-position of 2,2'-dimethoxy-1,1'-*** them,emitter R/S-2 and R/S-4 obtained by enhancing intramolecular charge transfer exhibited TADF characteristics due to relatively small Est of 0.12eV and 0.17eV,and relatively moderate SOC matrix elements of 0.28 cm^(-1)and 0.10 cm^(-1)between the 1CT and 3LE *** CD spectra of these enantiomers in diluted solutions showed perfect mirror images and reasonable gabs for small organic molecules(10^(-4)-10^(-3)).And the external quantum eficiencies(EQE)of 10.9%and 8.32%for device A and B based on emitter S-2 and S-4 were highest compared with currently reported axial chiral molecules based on the 3,3'-position substitution of binaphthyl skeleton,providing simple molecular design strategies to construct efficient CP-OLED device.

关键词： Thermally activated delayed fluorescence Organic light emitting diodes Binaphthyl skeleton Electronic circular dichroism Circularly polarized luminescence Thioxanthone

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Orchestrated cellular,biochemical,and biomechanical optimizations endow platelet-rich plasma-based engineered cartilage with structural and biomechanical recovery

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Bioactive Materials 2021年第11期6卷 3824-3838页

作者： Ketao Wang Ji Li Yuxing Wang Yaqiang Wang yuanyuan qin Fei Yang Mingzhu Zhang Heng Zhu Zhongli Li Department of Orthopedics Chinese PLA General HospitalHaidianBeijing100853China Beijing Institute of Radiation Medicine/Beijing Institute of Basic Medical Sciences HaidianBeijing100850China Department of Foot and Ankle Beijing Tongren HospitalCapital Medical UniversityBeijing100730China Beijing National Laboratory for Molecular Sciences Institute of ChemistryChinese Academy of SciencesBeijing100190China Department of Orthopedic Surgery Zhongshan HospitalFudan UniversityShanghai200032China Department of Blood Transfusion Chinese PLA General HospitalHaidianBeijing100853China

Recently,biomaterials for cartilage regeneration has been intensively ***,the development of scaffolds that capture regenerated cartilage with biomechanical and structural recovery has rarely been *** address this challenge,platelet-rich plasma(PRP)-based cartilage constructs with a well-orchestrated symphony of cellular,biochemical and biomechanical elements were prepared by simultaneously employing chondrogenic progenitor cells(CPCs)as a cell source,optimizing platelet concentration,and adding an enzyme-ion *** was shown that this triple-optimized PRP+CPC construct possessed increased biomechanical properties and suitable biochemical *** following in vitro study demonstrated that the triple-optimized PRP+CPC constructs generated cartilage-like tissue with higher expression levels of chondrogenic-specific markers,more deposition of cartilage-specific extracellular matrix(ECM),and greater biomechanical values than those of the other *** weeks after the construct was implanted in a cartilage defect in vivo,histological analysis,qPCR,and biomechanical tests collectively showed that the triple-optimized constructs yielded a more chondrocyte-like cell phenotype with a higher synthesis of Col-Ⅱand *** importantly,the triple-optimized constructs facilitated cartilage regeneration with better biomechanical recovery than that of the other *** results demonstrate the efficacy of the triple-optimization strategy and highlight the simplicity and potency of this PRP+CPC construct for cartilage regeneration.

关键词： Platelet-rich plasma Cartilage regeneration Structural recovery Biomechanical recovery

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Nearly 100% exciton utilization in highly efficient red OLEDs based on dibenzothioxanthone acceptor

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Chinese Chemical Letters 2022年第10期33卷 4645-4648页

作者： Xiaoxiao Hu yuanyuan qin Zhiyi Li Honglei Gao Teng Gao Guanhao Liu Xiangyu Dong Naxi Tian Xiuxian Gu Chun-Sing Lee Pengfei Wang Ying Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU‒CAS Joint Laboratory of Functional Materials and Devices Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Center of Super-Diamond and Advanced Films(COSDAF) City University of Hong KongHong KongChina

Improving the utilization of excitons has always been an important topic for the development of electroluminescence *** this work,we designed and synthesized three red TADF emitters TPA-DBT12,TPA-DBT3 and DTPA-DBT by employing dibenzothioxanthone(DBT)acceptor framework to stabilize the locally excited triplet state to participate in the reverse intersystem crossing(RISC)*** fast RISC process and singlet radiation decay process gave rise to evidently enhanced exciton *** of the red OLEDs based on these materials showed maximum EQE over 11% and high exciton utilization close to 100%.This work not only extend the acceptor framework for red materials but also provide a new perspective for the design of highly efficient red TADF materials with 100% exciton utilization by managing locally excited triplet state.

关键词： Red light Organic light-emitting diode Thermally activated delayed fluorescence Exciton utilization Locally excited triplet state

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Changes of human immunodeficiency virus (HIV) burden globally and in China over three decades: a secondary analysis of global HIV statistics

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Chinese Medical Journal 2022年第22期135卷 2690-2698页

作者： Yanqiu Lu Shengquan Tang yuanyuan qin Vijay Harypursat Hao Wu Yaokai Chen Department of Infectious Diseases Chongqing Public Health Medical CenterChongqing 400036China Beijing Key Laboratory for HIV/AIDS Research Clinical and Research Center for Infectious DiseasesBeijing Youan HospitalCapital Medical UniversityBeijing 100069China

Background: A more comprehensive understanding of the trends of incidence, prevalence, and mortality in human immunodeficiency virus (HIV), and their complex interrelationships, may provide important evidence for decision-making related to HIV prevention and control. The variances in these indices between different population groups, genders, and ages are critical to decipher evolving patterns of the HIV epidemic in specific ***: A secondary analysis of relevant data was conducted using data extracted from the Global Burden of Disease study of 2019. HIV/acquired immune deficiency syndrome (AIDS) incidence, prevalence, AIDS-related mortality, and mortality-to-prevalence ratio (MPR) for annual percentage change, average annual percentage change (AAPC), and corresponding 95% confidence intervals (CIs) were calculated using joinpoint regression statistical ***: The AAPC of HIV/AIDS incidence, prevalence, AIDS-related mortality rate, and MPR were -1.4 (95% CI: -1.6, -1.2), 4.1 (95% CI: 4.0, 4.3), 2.0 (95% CI: 1.7, 2.3), and -2.1 (95% CI: -2.3, -1.8) between 1990 and 2019 globally, and were 3.5 (95% CI: 2.2, 4.8), 6.9 (95% CI: 6.8, 7.0), 8.1 (95% CI: 7.1, 9.1), and 1.2 (95% CI: 0.1, 2.3) in China during the same period. In terms of differences in the preceding indicators by gender, we observed a similar pattern of trends for male and female genders both globally and in China during the entire study period. Each specific age group exhibits a distinct pattern in terms of incidence, prevalence, mortality rate, and MPR both globally and in ***: Prevalence and mortality rates of HIV/AIDS have increased between 1990 and 2019 globally and in China. While the incidence rate and MPR have declined globally over the past three decades, these two indicators are observed to present an increasing trend in China. There is a high HIV burden among young and middle-aged adults globally;however, the elderly have a high HIV burden in China. HIV scre

关键词： Human immunodeficiency virus Incidence Mortality Mortality-to-prevalence ratio Prevalence

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