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Auxin Is Required for Valve Margin Patterning in Arabidopsis After All

Molecular Plant 2016年第6期9卷 768-770页

作者： stefan de Folter Unidad de Genomica Avanzada (LANGEBIO) Centro de Investigaci6n y de Estudios Avanzados del Instituto Politecnico Nacional (CINVESTAV-IPN) Kin. 9.6 Ubramiento Norte Carretera Irapuato-Leon Irrapuato Guanajuato CP 36821 Mexico

Fruits are important as a nutritional source, but biologically more important are their seed protection and dispersal funcions. Dry fruits can be dehiscent and the process of opening of ripe fruits, or pod shattering, causes the seeds to be dispersed （Ferrandiz, 2002）. This process occurs in many crop species, for instance of members of the Brassicaceae family. Arabidopsis thaliana, the model plant species in the laboratory, belongs to this family and also presents pod shattering （Figure 1）. The Arabidopsis fruit is a silique, and before fertilization it is called a gynoecium or pistil. The gynoecium is formed by two carpels that are fused, and the replum is present at their margins and is connected to the septum that divides the silique inside. In between each valve-replum border, the valve margin or dehiscence zone is formed. When the fruit matures, a separation layer and a lignified cell layer are formed in the dehiscence zone. In addition, a lignified layer is formed in the valves, and when the mature fruit starts to desiccate, tension is created, which in association with the effect of middle lamella degrading enzymes in the separation layer, results in shattering of the fruit （Ferrandiz, 2002）. Research has led to the proposal of a model for the gene regulatory network that explains valve margin formation in Arabidopsis （e.g., Ch＆vez Montes et al., 2015）. Mutations in various members of this gene regulatory network result in indehiscent fruits, i.e., the fruit does not open or shatter. One of these genes is the bHLH transcription factor INDEHISCENT （IND）, which is necessary for the formation of the separation layer and the lignified cell layers （Liljegren et al., 2004）. IND has also been related to auxin, more precisely, to auxin distribution, important for gynoecium and fruit patterning （Sorefan et al., 2009; Girin et al., 2011）.

关键词： important Arabidopsis formed

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The Asymmetric Connection of SST in the Tasman Sea with Respect to the Opposite Phases of ENSO in Austral Summer

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Advances in Atmospheric Sciences 2022年第11期39卷 1897-1913页

作者： Xueqian SUN Shuanglin LI stefan LIESS Climate Change Research Center(CCRC) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Atmospheric Science/Centre for Severe Weather and Climate and Hydro-geological Hazards China University of GeosciencesWuhan 430074China College of Earth and Planetary Science University of Chinese Academy of SciencesBeijing 100049China Department of Soil Waterand ClimateUniversity of MinnesotaTwin CitiesSt.Paul MN 55108MinnesotaUSA

This study uses linear regression and composite analyses to identify a pronounced asymmetric connection of sea surface temperature(SST)in the Tasman Sea with the two opposite phases of El Ni?o-Southern Oscillation(ENSO)during austral *** El Ni?o years,the SST anomalies(SSTAs)in the Tasman Sea exhibit a dipolar pattern with weak warmth in the northwest and modest cooling in the southeast,while during La Ni?a years the SSTAs exhibit a basin-scale warmth with greater *** into the underlying mechanism suggest that this asymmetry arises from a mechanism related to oceanic heat transport,specifically the anomalous Ekman meridional heat transport induced by the zonal wind stress anomalies,rather than the surface heat fluxes on the air-sea *** analysis reveals that the asymmetry of oceanic heat transport between El Ni?o and La Ni?a years is driven by the asymmetric atmospheric circulation over the Tasman Sea stimulated by the asymmetric diabatic heating in the tropical Pacific between the two opposite ENSO phases.

关键词： El Ni?o-Southern Oscillation SST in the Tasman Sea asymmetric connection surface heat fluxes oceanic heat transport

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Photoluminescence and electrochemiluminescence studies of chosen rare earths systems

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Journal of Rare Earths 2008年第2期26卷 192-197页

作者： stefan Lis Slawomir But Krzysztof Staninski Monika Jesiolowska Department of Rare Earths Faculty of Chemistry Adam Mickiewicz University Grunwaldzka 6

Eu（Ⅲ） complexes with chosen Keggin polyoxomatalates, POM, containing organic counter cations （tetrabutylarnmonium, tetrabutylphosphonium, triphenylethylphosphonium）, were synthesized, and their photophysical properties were studied. The synthesized complexes had the general formula of XnH5-n[EuSiW11O39], formulated based on the results of elemental and thermogravimetric analysis and FTIR spectroscopy. The photophysical properties of the obtained compounds were investigated using photoluminescence and electrochemiluminescence, ECL, methods in solutions and solids. The most intense luminescence of Eu（Ⅲ） was observed for the complexes with tetrabutylarnmonium cations. After the addition of phenanthroline to the XnH5-n[EuSiW11O39] solutions, a large increase in the Eu（Ⅲ） luminescence intensity and a lengthening of its luminescence lifetime were observed as a result of the formation of ternary complexes. Attempts to apply ECL as a method of light emission by generating species capable of forming excited states in Ln/POMs, i.e., Tb（Ⅲ） and Eu（Ⅲ） in the Na9EuW10O36 and Na9TbW10O36 complexes, were made. The influence of the POM complexes on the ECL was also tested using the Tb/EDDHA （EDDA=ethylenediamine di（o-hydroxyphenylacetic acid）） complex, which is effective in generating ECL.

关键词： Ln(Ⅲ) luminescence electrochemiluminescence polyoxometalates complexes rare earths

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Interictal and Ictal MEG in presurgical evaluation for epilepsy surgery

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Acta Epileptologica 2020年第1期2卷 83-92页

作者： Hermann stefan stefan Rampp Department of Neurology-Biomagnetism University Hospital Erlangen6Schabachanlage91054 ErlangenGermany. Department of Neurosurgery University Hospital Erlangen6SchabachanlageErlangenGermany.

Although presurgical evaluation of patients with pharamacoresistent focal epilepsies provides essential information for successful epilepsy surgery,there is still a need for further *** of noninvasive electrophysiological recording and analysis techniques offer additional information based on interictal and ictal epileptic *** this review,we provide an overview on the application of ictal magnetoencephalography(MEG).The results of a literature research for published interictal/ictal MEG findings and experiences with own cases are demonstrated and *** MEG may provide added value in comparison to interictal *** results may be more focal and closer to the invasively determined seizure onset *** some patients without clear interictal findings,ictal MEG could provide correct *** recording and analysis techniques facilitate ictal ***,extended recording durations,movement and artifacts still represent practical *** MEG may provide added value regarding the localization of the seizure onset zone but depends on the selection of patients and the application of optimal analysis techniques.

关键词： Ictal MEG Interictal MEG Localization of epileptic activity Presurgical evaluation

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Advanced hepatocellular carcinoma treatment strategies:Are transarterial approaches leading the way?

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 22-27页

作者： stefan Patauner Giovanni Scotton Francesca Notte Antonio Frena Department of General and Pediatric Surgery Bolzano Central Hospital-SABESBolzano 39100Trentino-Alto AdigeItaly

Hepatocellular carcinoma(HCC)is a leading cause of cancer-related mortality worldwide,with advanced stages posing significant treatment ***-though hepatic arterial infusion chemotherapy(HAIC)has emerged as a promising modality for treating advanced HCC,particularly in Asian clinical practice,its adoption in Western medicine remains limited due to a lack of large-scale randomized controlled *** editorial reviews and comments on the meta-analysis conducted by Zhou et al,which evaluates the efficacy and safety of HAIC and its combination strategies for advanced *** authors performed a comprehensive meta-analysis of various clinical trials and cohort studies comparing HAIC and its combinations to other first-line treatments,such as sorafenib and transarterial chemoembolization(TACE).In this work,HAIC showed significantly better results regarding overall survival and progression-free survival compared to sorafenib or TACE alone and their *** in combination with lenvatinib,ablation,programmed cell death 1 inhibitors,and radiotherapy further enhanced patient outcomes,indicating a synergistic *** editorial focuses on the critical role of multimodal treatment strategies in managing advanced *** advocates for a paradigm shift towards integrated treatment approaches to enhance survival rates and improve the quality of life in patients with advanced HCC.

关键词： Hepatocellular carcinoma Hepatic arterial infusion chemotherapy Transarterial chemoembolization Sorafenib Combined therapy

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Electron–plasmon and electron–magnon scattering in ferromagnets from first principles by combining GW and GT self-energies

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npj Computational Materials 2021年第1期7卷 1619-1632页

作者： Dmitrii Nabok stefan Blügel Christoph Friedrich Peter Grünberg Institut and Institut for Advanced Simulation Forschungszentrum JülichJülich 52425Germany

This work combines two powerful self-energy techniques:the well-known GW method and a self-energy recently developed by us that describes renormalization effects caused by the scattering of electrons with magnons and Stoner *** GT selfenergy,which is fully k-dependent and contains infinitely many spin-flip ladder diagrams,was shown to have a profound impact on the electronic band structure of Fe,Co,and *** the present work,we refine the method by combining GT with the GW *** resulting GWT spectral functions exhibit strong lifetime effects and emergent dispersion *** are in an overall better agreement with experimental spectra than those obtained with GW or GT alone,even showing partial improvements over local-spin-density approximation dynamical mean-field *** performed analysis provides a basis for applying the GWT technique to a wider class of magnetic materials.

关键词： materials theory infinitely

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Numerical Studies of Vanka-Type Smoothers in Computational Solid Mechanics

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Advances in Applied Mathematics and Mechanics 2009年第1期1卷 29-55页

作者： Hilmar Wobker stefan Turek Institute of Applied Mathematics LS3TU DortmundD-44227 DortmundGermany

In this paper multigrid smoothers of Vanka-type are studied in the context of Computational Solid Mechanics(CSM).These smoothers were originally developed to solve saddle-point systems arising in the field of Computational Fluid Dynamics(CFD),particularly for incompressible flow *** treating(nearly)incompressible solids,similar equation systems arise so that it is reasonable to adopt the‘Vanka idea’for *** there exist numerous studies about Vanka smoothers in the CFD literature,only few publications describe applications to solid mechanical *** this paper we want to contribute to close this *** depict and compare four different Vanka-like smoothers,two of them are oriented towards the stabilised equal-order Q_(1)/Q_(1)finite element *** means of different test configurations we assess how far the smoothers are able to handle the numerical difficulties that arise for nearly incompressible material and anisotropic *** the one hand,we show that the efficiency of all Vanka-smoothers heavily depends on the proper parameter *** the other hand,we demonstrate that only some of them are able to robustly deal with more critical ***thermore,we illustrate how the enclosure of the multigrid scheme by an outer Krylov space method influences the overall solver performance,and we extend all our examinations to the nonlinear finite deformation case.

关键词： Coupled multigrid Vanka smoother linear and finite elasticity nearly incompressible material saddle point systems finite elements

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Small Directed Strongly Regular Graphs

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Algebra Colloquium 2020年第1期27卷 11-30页

作者： stefan Gyurki Deparment of Mathematics and Descriptive Geometry Faculty of Civil Engineering Slovak University of Technology81005 BratislavaSlovakia

The goal of the present paper is to provide a gallery of small directed strongly regular *** each graph of order n≤12 and valency k 详细信息

The goal of the present paper is to provide a gallery of small directed strongly regular *** each graph of order n≤12 and valency k

关键词： directed strongly regular graphs Cayley graphs voltage assignments

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A COMPARATIVE STUDY ON INVOLVEMENT OF tPA ACTIVITY IN OVULATION INDUCED BY hCG AND GnRH AGONIST IN HYPOPHYSECTOMIZED RATS

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Science China Chemistry 1991年第10期34卷 1215-1224页

作者：刘以训冯强 CAJANDER stefan Laboratory of Reproductive Biology and Department of Endocrinology Institute of Zoology Academia Sinica Beijing 100080 PRC Department of Pathology Ume UniversityS-90187UmeSweden

A GnRH agonist (5-50 μg) is capable of inducing ovulation in PMSG-primed hypophy-sectomized immature rats, as is the case in hCG-induced ovulation, but 2-4 h earlier than hCG. GnRH-induced ovulation is effectively blocked by the concomitant administration of the GnRH-antagonist which failed to interfere with hCG-induced ovulation, indicating that GnRH and its agonists do not share a receptor with LH/hCG. Like hCG, GnRH is also capable of inducing tissue type (tPA), but not urokinase type (uPA) PA. The plasminogen activator activity in ovarian homogenates and the granulosa and theca-interstitial cells increase in a time-dependent manner, reaching maximum levels just prior to ovulation. Similar to hCG, GnRH also increases tPA activity in cumulus-oocyte complexes in a time-dependent fashion.

关键词： hCG GnRH agonist hypophysectomized rat ovulation tPA.

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Machine Learning for heat radiation modeling of bi-and polydisperse particle systems including walls

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Particuology 2023年第3期74卷 119-140页

作者： Josef Tausendschön Gero Stöckl stefan Radl Institute of Process and Particle Engineering Graz University of TechnologyInffeldgasse 13/III8010GrazAustria

We investigated the ability of four popular Machine Learning methods i.e.,Deep Neural Networks(DNNs),Random Forest-based regressors(RFRs),Extreme Gradient Boosting-based regressors(XGBs),and stacked ensembles of DNNs,to model the radiative heat transfer based on view factors in bi-and polydisperse particle beds including *** training and analyzing the predictive capability of each method,an adjustment of markers used in monodisperse systems,as well as an evaluation of new markers was *** the basis of our dataset that considers a wide range of particle radii ratios,system sizes,particle volume fractions,as well as different particle-species volume fractions,we found that(i)the addition of particle size information allows the transition from monodisperse to bi-and polydisperse beds,and(ii)the addition of particle volume fraction information as the fourth marker leads to very accurate *** terms of the overall performance,DNNs and RFRs should be preferred compared to the other two *** particle-particle view factors,DNN and RFR are on par,while for particle-wall the RFR is *** demonstrate that DNNs and RFRs can be built to meet or even exceed the prediction quality standards achieved in a monodisperse system.

关键词： Discrete element method(DEM) Heat radiation modeling Machine learning View factors Wall radiation Polydisperse particles

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