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QSPR study about sampling rates of semipermeable membrane devices for monitoring of organochlorine pesticides in Alps air

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Chinese Science Bulletin 2011年第18期56卷 1884-1889页

作者： ZHU XiuHua DING GuangHui LEVY Walkiria JAKOBI Gert OFFENTHALER Ivo MOCHE Wolfang WEISS Peter SCHRAMM Karl-Werner School of Environmental and Chemical Engineering Dalian Jiaotong University Dalian 116028 China College of Environmental Science and Engineering Dalian Maritime University Dalian 116026 China Helmholtz Zentrum Miinchen-German Research Center for Environmental Health Institute of Ecological Chemistry Ingolstiidter Landstr. 1 D-85764 Neuherberg Munich Germany tum Wissenschaftszentrum Weihenstephanfuer Ernaehrung und Landnutzung Departmentfuer Biowissenschaftliche Grundlagen Weihen- stephaner Steig 23 85350 Freising Germany Umweltbundesamt GmbH Spittelauer Lginde 5 1090 Wien Austria

Organochlorine pesticides (OCP) were monitored at the Weissfluhjoch site (Switzerland) and the top of Mt. Sonnblick (Austria) with a low volume active air sampler and semipermeable membrane devices (SPMD). The air sampling rates (Rair) of the SPMD for OCP were calculated. Statistical tests showed that there was no significant difference between Rair at the two different sampling sites. Quantitative structure-property relationship (QSPR) models of the Rair of the SPMD were developed for OCP using partial least square (PLS) regression. Quantum chemical descriptors computed by the semi-empirical PM6 method were used as predictor variables. The cumulative variance of the dependent variable explained by the PLS components and determined by cross-validation (Q2cum) was >0.818 for each optimal model. This indicates that the model has good predictive ability and robustness. The Rair of the SPMD for OCP is related to the total energy, the van der Waals area and the total dipole moment of the OCP molecules. The main factors governing Rair values of OCP are intermolecular interactions and the energy required for cavity-formation in dissolution of OCP into triolein of the SPMD. The linear correlation coefficient between predicted and experimental values were all >0.921.

关键词：空气采样器半透膜装置有机氯农药 QSPR 采样率阿尔卑斯山监测计算量子化学

Electrochemical impedance spectroscopy of PEM fuel cells at low hydrogen partial pressures: efficient cell tests for mass production

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Industrial Chemistry & Materials

Industrial Chemistry & Materials 2024年第1期2卷 132-140页

作者： Felix Haimerl Sunil Kumar Michael Heere Aliaksandr S.Bandarenka Technical University of Munich School of Natural SciencesDepartment of PhysicsProfessorship of Physics of Energy Conversion and Storage85748 GarchingGermany BMW AG Petuelring 13080809 MunchenGermany Technical University Braunschweig Faculty of Mechanical EngineeringInstitute of Internal Combustion Engines and Fuel Cells38108 BraunschweigGermany Technical University of Munich Catalysis Research Center TUMErnst-OttoFischer-Straße 185748 GarchingGermany

Quality testing costs hinder the large-scale production of PEM fuel cell systems due to long testing times and high safety measures for *** eliminating both issues,electrochemical impedance spectroscopy at low hydrogen concentrations can provide valuable insights into fuel cell ***,the influence of high anode stream dilutions on PEM fuel cell performance is not yet completely *** study presents a new equivalent circuit model to analyze impedance spectra at low hydrogen partial *** proposed model accurately describes the impedance response and explains the performance decrease at low hydrogen ***,the reduced availability of hydrogen at the anode leads to rising reaction losses from the hydrogen ***,the resulting losses lead to potential changes also influencing the cathode *** findings indicate that impedance spectroscopy at low hydrogen partial pressure might provide a reliable fuel cell quality control tool,simplifying production processes,reducing costs,and mitigating risks in fuel cell production.

关键词： PEM fuel cells Electrochemical impedance spectroscopy EIS Large scale PEMFC production Anodes Cathodes

Low-depth optical neural networks

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Chip 2022年第1期1卷 8-13页

作者： Xiao-Ming Zhang Man-Hong Yung Department of Physics Southern University of Science and TechnologyShen-zhen 518055China Department of Physics City University of Hong KongTat Chee AvenueKowloonHong Kong SARChina Shenzhen Institute for Quan-tum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Quantum Science and Engineering Southern University of Science and TechnologyShen-zhen 518055China Shenzhen Key Laboratory of Quantum Science and En-gineering Southern University of Science and TechnologyShenzhen518055China

Optical neural network(ONNs)are emerging as attractive propos-als for machine-learning ***,the stability of ONNs decreases with the circuit depth,limiting the scalability of ONNs for practical *** we demonstrate how to compress the circuit depth to scale only logarithmically in terms of the dimension of the data,leading to an exponential gain in terms of noise *** low-depth(LD)-ONN is based on an architecture,called Optical Com-puTing Of dot-Product UnitS(OCTOPUS),which can also be applied individually as a linear perceptron for solving classification *** present both numerical and theoretical evidence showing that LD-ONN can exhibit a significant improvement on robustness,compared with previous ONN proposals based on singular-value decomposition.

关键词： optical neural networks photonic chip machine learning

Solar cell-based hybrid energy harvesters towards sustainability

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Opto-Electronic Science 2023年第6期2卷 1-21页

作者： Tianxiao Xiao Suo Tu Suzhe Liang Renjun Guo Ting Tian Peter Müller-Buschbaum Chair for Functional Materials Department of PhysicsTUM School of Natural SciencesTechnical University of MunichJames-Franck-Str.185748 GarchingGermany Heinz Maier-Leibniz Zentrum(MLZ) Technical University of MunichLichtenbergstraße 185748 GarchingGermany

Energy harvesting plays a crucial role in modern *** the past years,solar energy,owing to its renewable,green,and infinite attributes,has attracted increasing attention across a broad range of applications from small-scale wearable electronics to large-scale energy ***,the utility of solar cells in providing a stable power supply for vari-ous electrical appliances in practical applications is restricted by weather *** address this issue,researchers have made many efforts to integrate solar cells with other types of energy harvesters,thus developing hybrid energy har-vesters(HEHs),which can harvest energy from the ambient environment via different working *** this re-view,four categories of energy harvesters including solar cells,triboelectric nanogenerators(TENGs),piezoelectric nanogenerators(PENGs),and thermoelectric generators(TEGs)are *** addition,we systematically summar-ize the recent progress in solar cell-based hybrid energy harvesters(SCHEHs)with a focus on their structure designs and the corresponding *** hybridization designs through unique combinations of TENG,PENG,and TEG with solar cells are elaborated in ***,the main challenges and perspectives for the future development of SCHEHs are discussed.

关键词： solar cell hybrid energy harvesters triboelectric nanogenerators piezoelectric nanogenerators thermoelectric generators

Evaluating the phyto-complexity and poly-pharmacology of spices: The case of Aframomum melegueta K. Schum (Zingiberaceae)

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Food Bioscience 2022年第5期49卷 1230-1245页

作者： Simon Vlad Luca Adriana Trifan Gokhan Zengin Kouadio Ibrahim Sinan Abdullahi Ibrahim Uba Izabela Korona-Glowniak Krystyna Skalicka-Wo´zniak Biothermodynamics TUM School of Life SciencesTechnical University of Munich85354FreisingGermany Department of Pharmacognosy Grigore T.Popa University of Medicine and Pharmacy Iasi700115IasiRomania Physiology and Biochemistry Research Laboratory Department of BiologyScience FacultySelcuk UniversityUniversity Campus42130KonyaTurkey Department of Molecular Biology and Genetics Faculty of Engineering and Natural SciencesKadir Has UniversityIstanbul34083Turkey Department of Pharmaceutical Microbiology Faculty of PharmacyMedical University of Lublin20-093LublinPoland Department of Natural Products Chemistry Medical University of Lublin20-093LublinPoland

The seeds of Aframomum melegueta K. Schum (grains of paradise, Zingiberaceae) are used as a common spice in African countries and a fine condiment in the European cuisine. In this study, we evaluated the phytochemical profile of various seed extracts of A. melegueta as well as their antimicrobial, antioxidant and enzyme inhibitory effects. In total, 25 diarylheptanoids, five gingerol derivatives and nine phenolic/organic acids were tentatively annotated in A. melegueta by liquid chromatography hyphenated with high resolution tandem mass spectrometry (LC-HRMS/MS). A. melegueta showed a moderate inhibitory activity against different human pathogenic microbial strains, with H. pylori the most sensitive microorganism. A strong antioxidant and enzyme inhibitory potential was shown in various radical scavenging, reducing and chelating assays as well as in cholinesterase, tyrosinase and glucosidase assays. Several specialized metabolites from A. melegueta (diarylheptanoids, gingerols) were shown to be directly linked with the investigated antioxidant and enzyme inhibitory activities, as evaluated through the correlation analysis. In addition, two diarylheptanoids (one heptan-3-ol and one heptan- 3,5-diol) displayed the strongest binding to acetylcholinesterase (AChE) via multiple H-bonds, a couple of π-π interactions and van der Waals interactions all over the catalytic channel of the enzyme, as evidenced by the molecular docking study. Overall, our work brings new contributions to the phyto-complexity and poly-pharmacology of spices from genus Aframomum than can find future applications in pharmaceutical, nutraceutical or cosmeceutical industry.

关键词： Aframomum melegueta Zingiberaceae Spices Gingerols Helicobacter

Neutron and Alpha Structure in Neutron Deficient Nuclei in Astrophysics

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原子核物理评论 2016年第2期33卷 212-216页

作者： S.Kubono 何建军 H.Yamaguchi D.M.Kahl S.Hayakawa T.Teranishi S.Cheribini M.Gulino Y.K.Kwon T.Hashimoto Y.Wakabayashi N.Iwasa S.Kato T.Komatsubara D.N.Binh L.H.Khiem N.N.Duy T.Kawabata C.Spitaleri G.G.Rapisarda M.La Cognata L.Lamia R.G.Pizzone S.Romano A.Coc N.de Sereville F.Hammache G.Kiss S.Bishop Institute of Modern Physics Chinese Academy of Sciences RIKEN Nishina Center Center for Nuclear Study University of Tokyo Department of Physics Kyushu University Laboratori Nazionali del Sud Istituto Nazionale di Fisica Nucleare Institute for Basic Science 70Yuseong-daero 1689-gil RIKEN Nishina Center 2-1 Hirosawa Department of Physics Tohoku University Department of Physics Yamagata University Institute of Physics Vietnam Academy for Science and Technology Department of Physics Kyoto University IN2P3 Institute for Nuclear Research (MTA-ATOMKI) tum

The paper includes discussions on the important role of neutron and alpha configurations in proton-rich nuclei in nuclear astrophysics in terms of nucleosynthesis under extremely high-temperature hydrogenburning conditions. The νp-process, which is supposed to take place at the very early epoch of type II supernovae, has considerable neutrons and alphas together with protons. The alpha-induced reactions on proton-rich unstable nuclei in the light mass regions is expected to play a crucial role, but very few of them were investigated well yet because of the experimental difficulties. Specifically, I report our recent experimental effort for the breakout process from the pp-chain region,~7Be(α, γ)^(11)C(α,p)^(14)N under the νp-process. The neutron-induced reactions on proton-rich nuclei, which is even more a challenging subject, were investigated previously for very few nuclei. One possible experimental method is the Trojan Horse Method(THM). We successfully have applied THM to the ^(18)F(n,α)^(14)N reaction study with an unstable beam of ^(18)F.

关键词： alpha-and neutron-induced stellar reactions in proton-rich nuclear region νp-process pp-chain breakout nuclear cluster structures in astrophysics low-energy RI beam

Characterization of the chemical fungicides-responsive and bacterial pathogen-preventing Bacillus licheniformis in rice spikelet

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Food Quality and Safety 2023年第2期7卷 256-266页

作者： Chengfang Zhan Mengchen Wu Hongda Fang Xiaoyu Liu Jiuyue Pan Xiaoyan Fan Mengcen Wang Haruna Matsumoto State Key Laboratory of Rice Biology&Ministry of Agricultural and Rural Affairs Laboratory of Molecular Biology of Crop Pathogens and Insects Zhejiang UniversityHangzhouChina Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province Institute of Pesticide and Environmental ToxicologyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina Zhejiang Laboratory for Systems&Precision Medicine Zhejiang University Medical CenterHangzhouChina School of Medicine Zhejiang UniversityHangzhouChina College of Plant Protection Hunan Agricultural UniversityHunanChina Plant Genetics TUM School of Life SciencesTechnical University of MunichFreisingGermany Global Education Program for AgriScience Frontiers Graduate School of AgricultureHokkaido UniversitySapporoJapan

Seed-borne bacterial pathogens cause severe yield loss and biotoxin contamination in rice,leading to increasing concern on the global food supply and environmental *** native microbes play an important role in defending against diseases,but their actions are often influ-enced by the chemical fungicides applied in the ***,Bacillus licheniformis mmj was isolated from rice spikelet,which uniquely showed not only fungicide-responsiveness but also broad-spectrum antimicrobial activity against major rice bacterial pathogens including Xanthomonas oryzae ***,Burkholderia plantari and Burkholderia *** understand the hallmark underlying the environmental adaptation and anti-microbial activity of *** mmj,the genome sequence was determined by SMRT and subjected to bioinformatics *** sequence analysis enabled the identification of a set of antimicrobial-resistance and antibacterial activity genes together with an array of harsh environment-adaptive ***,*** mmj metabolites were analyzed with gas chromatography coupled to triple quadrupole mass spectrometry,and the volatile components that were linked with the antimicrobial activity were preliminarily ***,the present findings reveal the genomic and metabolic landscapes underlying fungicide-responsive ***,which offers a new opportunity to design harsh environment-adaptive biopesticides to cope with prevalent bacterial phytopathogens.

关键词： Bacillus licheniformis fungicide adaptation antimicrobial activity genomics metabolites rice production

The molecular biology of pancreatic adenocarcinoma:translational challenges and clinical perspectives

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Signal Transduction and Targeted Therapy 2021年第8期6卷 2348-2370页

作者： Shun Wang Yan Zheng Feng Yang Le Zhu Xiao-Qiang Zhu Zhe-Fang Wang Xiao-Lin Wu Cheng-Hui Zhou Jia-Yan Yan Bei-Yuan Hu Bo Kong De-Liang Fu Christiane Bruns Yue Zhao Lun-Xiu Qin Qiong-Zhu Dong Department of General Surgery Huashan HospitalCancer Metastasis InstituteFudan UniversityShanghaiChina Department of Pancreatic Surgery Pancreatic Disease InstituteHuashan HospitalFudan UniversityShanghaiChina School of Biomedical Sciences Li Ka Shing Faculty of MedicineThe University of Hong KongHong KongChina General Visceral and Cancer SurgeryUniversity Hospital of CologneCologneGermany Department of Biliary-Pancreatic Surgery Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Surgery Klinikum rechts der IsarSchool of MedicineTechnical University of Munich(TUM)MunichGermany Key laboratory of whole-period monitoring and precise intervention of digestive cancer Shanghai Municipal Health Commission(SMHC)ShanghaiChina

Pancreatic cancer is an increasingly common cause of cancer mortality with a tight correspondence between disease mortality and ***,it is usually diagnosed at an advanced stage with a very dismal *** to the high heterogeneity,metabolic reprogramming,and dense stromal environment associated with pancreatic cancer,patients benefit little from current conventional *** insight into the biology and genetics of pancreatic cancer has supported its molecular classification,thus expanding clinical therapeutic *** this review,we summarize how the biological features of pancreatic cancer and its metabolic reprogramming as well as the tumor microenvironment regulate its development and *** further discuss potential biomarkers for pancreatic cancer diagnosis,prediction,and surveillance based on novel liquid *** also outline recent advances in defining pancreatic cancer subtypes and subtype-specific therapeutic responses and current preclinical therapeutic ***,we discuss prospects and challenges in the clinical development of pancreatic cancer therapeutics.

关键词： clinical mortality diagnosis

Altered Cortical Information Interaction During Respiratory Events in Children with Obstructive Sleep Apnea-Hypopnea Syndrome

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Neuroscience Bulletin 2024年第10期40卷 1458-1470页

作者： Jin Chen Minmin Lin Naikai Shi Jingxian Shen Xuchu Weng Feng Pang Jiuxing Liang Key Laboratory of Brain Cognition and Education ScienceMinistry of EducationChinaInstitute for Brain Research and RehabilitationGuangdong Key Laboratory of Mental Health and Cognitive ScienceSouth China Normal UniversityGuangzhou 510631China School of General Education Guangzhou Huali CollegeGuangzhou 511325China Department of Sleep Medicine The Sixth Affliated HospitalSun Yat-sen UniversityGuangzhou 510655China Department of Otorhinolaryngology Head and Neck SurgeryThe Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655China tum-Neuroimaging Center Technical University of Munich81675 MunichGermany Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument Sun Yat-Sen UniversityGuangzhou 510006China Biomedical Innovation Center The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655China

Obstructive sleep apnea-hypopnea syndrome(OSAHS)significantly impairs children's growth and *** study aims to elucidate the pathophysiological mechanisms underlying OSAHS in children,with a particular focus on the alterations in cortical information interaction during respiratory *** analyzed sleep electroencephalography before,during,and after events,utilizing Symbolic Transfer Entropy(STE)for brain network construction and information flow *** results showed a significant increase in STE after events in specific frequency bands during N2 and rapid eye movement(REM)stages,along with increased STE during N3 stage ***,a noteworthy rise in the information flow imbalance within and between hemispheres was found after events,displaying unique patterns in central sleep apnea and ***,some of these alterations were correlated with symptom *** findings highlight significant changes in brain region coordination and communication during respiratory events,offering novel insights into OSAHS pathophysiology in children.

关键词： Obstructive sleep apnea-hypopnea syndrome Children Respiratory events Electroencephalogram Effective connectivity-Symbolic transfer entropy