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Ubiquitin-Specific Protease 14 （UBP14） Is Involved in Root Responses to Phosphate Deficiency in Arabidopsis

1999年

作者： schmidt Bob.

来源：畅想之星图书光盘版（南... 评论

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Molecular Plant 2010年第1期3卷 212-223页

作者： Wen-Feng Li Paula J. Perry Nulu N. Prafulla Wolfgang schmidt Institute of Plant and Microbial Biology Academia Sinica 115 Taipei

A mutant isolated from a screen of EMS-mutagenized Arabidopsis lines, per1, showed normal root hair development under control conditions but displayed an inhibited root hair elongation phenotype upon Pi deficiency. Additionally, the per1 mutant exhibited a pleiotropic phenotype under control conditions, resembling Pi-deficient plants in several aspects. Inhibition of root hair elongation upon growth on low Pi media was reverted by treatment with the Pi analog phosphite, suggesting that the mutant phenotype is not caused by a lack of Pi. Reciprocal grafting experiments revealed that the mutant rootstock is sufficient to cause the phenotype. Complementation analyses showed that the PER1 gene encodes an ubiquitin-specific protease, UBP14. The mutation caused a synonymous substitution in the 12th exon of this gene, resulting in a lower abundance of the UBP14 protein, probably as a consequence of reduced translation efficiency. Transcriptional profiling of per1 and wild-type plants subjected to short-term Pi starvation revealed genes that may be important for the signaling of Pi deficiency. We conclude that UBP14 function is crucial for adapting root development to the prevailing local availability of phosphate.

关键词： Phosphate deficiency root hairs ubiquitin-specific protease root development.

SOURCES OF PRECIPITABLE MOISTURE IN THE CHIHUAHUAN DESERT:POSSIBILITIES FOR IMPROVED UTILIZATION OF RAINFALL

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干旱区资源与环境 1993年第Z1期7卷 219-220页

作者： Robert H.schmidt Department of Geological Sciences The University of Texas at EI PasoU.S.A.

As a result of increased pressure being exerted upon arid, and particularly semiaridzones to improve the use of renewable resources, regional climatological analysis, and par-ticularly information pertaining to warm season rainfall, helps provide a significant contri-bution for better utilization pertaining to warm season rainfall, helps provide a

关键词： Chihuahuan Deset Precipitation Renewable Resources

On Exact Controllability of Networks of Nonlinear Elastic Strings in 3-Dimensional Space

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Chinese Annals of Mathematics,Series B 2012年第1期33卷 33-60页

作者： Gnter R.LEUGERING *** schmidt Department of Mathematics Friedrich-Alexander University Department of Mathematics and Statistics McGill University

This paper concerns a system of nonlinear wave equations describing the vibra- tions of a 3-dimensional network of elastic strings. The authors derive the equations and appropriate nodal conditions, determine equilibrium solutions, and, by using the methods of quasilinear hyperbolic systems, prove that for tree networks the natural initial, boundary value problem has classical solutions existing in neighborhoods of the ＂stretched＂ equilibrium solutions. Then the local controllability of such networks near such equilib- rium configurations in a certain specified time interval is proved. Finally, it is proved that, given two different equilibrium states satisfying certain conditions, it is possible to control the network from states in a small enough neighborhood of one equilibrium to any state in a suitable neighborhood of the second equilibrium over a sufficiently large time interval.

关键词： Nonlinear strings Network Quasilinear system of hyperbolic equations Controllability

Charcoal kiln sites, associated landscape attributes and historic forest conditions:DTM-based investigations in Hesse(Germany)

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Forest Ecosystems 2016年第3期3卷 174-189页

作者： Marcus schmidt Andreas M?lder Egbert Sch?nfelder Falko Engel Werner Fortmann-Valtink Northwest German Forest Research Institute Department A (Forest Growth) Kellerwald-Edersee National Park

Background： An examination of the distribution of ancient charcoal kiln sites in the forest landscape seems to be worthwhile, since general trends in the selection of suitable kiln site locations in the past might become obvious. In this way forest landscape elements with a more intense usage by charcoal burning can be identified. By doing this, we can expect to gain information on the former condition and tree species composition of woodland. Investigations on the spatial distribution of charcoal kiln sites in relation to landscape attributes are sparse, however, probably due to the high on-site mapping effort. The outstanding suitability of LiDAR-derived digital terrain models （DTMs） for the detection of charcoal kiln sites has been recently proved. Hence, DTM-based surveys of charcoal kiln sites represent a promising attempt to fill this research gap. Methods： Based on DTM-based surveys, we analyzed the spatial distribution of charcoal kiln sites in two forest landscapes in the German federal state of Hesse： Reinhardswald and Kellerwald-Edersee National Park. In doing so, we considered the landscape attibutes ＂tree species composition＂, ＂water supply status＂, ＂nutrient supply status＂, ＂soil complex classes＂, ＂altitude＂, ＂exposition＂, and ＂inclination＂. Results： We found that charcoal kiln sites were established preferably on hillside locations that provided optimal growing and regeneration conditions for European beech （Fagus sylvatico） due to their acidic brown soils and sufficient water supply. These results are in line with instructions for the selection of appropriate kiln site locations, found in literature from the 18th to the 19th century. Conclusions： We conclude that there were well-stocked, beech-dominated deciduous forest stands in northern Hesse before 1800, particularly at poorly accessible hillside locations. These large stocks of beech wood were utilized by the governments of the different Hessian territories through the establishment of ironworks

关键词： Airborne laser scanning Charcoal production Cultural remains Digital terrain model Fagus sylvatica Forest history Historical ecology Landscape history Industrial history Metallurgy

Hepatic steatosis prevents heme oxygenase-1 induction by isoflurane in the rat liver

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World Journal of Gastroenterology 2011年第37期17卷 4184-4190页

作者： Patrick Stoll Christian I Schwer Ulrich Goebel Hartmut Buerkle Alexander Hoetzel Rene schmidt Department of Anesthesiology and Critical Care Medicine Freiburg University Medical Center

AIM:To characterize the inductive effects of isoflurane(ISO) on hepatic heme oxygenase-1(HO-1) in an animal model of hepatic ***:Lean(LEAN) and obese(FAT) Zucker rats were randomized into 4 groups:1:LEAN + pentobarbital sodium(PEN);2:LEAN + ISO;3:FAT + PEN;4:FAT + *** animals were mechanically ventilated for 6 *** vitro analyses of liver tissue included determination of HO-1 mRNA and protein expression as well as measurement of HO enzyme activity and immunohistochemical ***:Compared to PEN treatment,ISO administration profoundly induced hepatic HO-1 mRNA and protein expression and significantly increased HO enzyme activity in lean Zucker *** contrast,no difference in HO-1 gene expression was observed after ISO or PEN anesthesia in obese Zucker ***:The present study demonstrates that ISO is an inducer of hepatic HO-1 gene expression in non-steatotic organs but failed to upregulate HO-1 in steatotic livers.

关键词： Isoflurane Heme oxygenase Hepatic steatosis Heme oxygenase-1 Volatile anesthetics

METHODS FOR DUSTINESS ESTIMATION OF INDUSTRIAL POWDERS

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China Particuology 2005年第1期3卷 90-93页

作者： Frank Hamelmann Eberhard schmidt Safety Technology/Environmental Protection Department D University of Wuppertal 42097 Wuppertal Germany

Handling industrial powders leads to dust emissions. These emissions tend to generate human diseases or cause other environmental effects. A multitude of apparatus has been developed to estimate this dustiness behaviour of powders. Two of these well-known methods are presented and compared with each other. A third recently developed method is also introduced.

关键词： dustiness powders particle characterization health environment

On a Fast Integral Equation Method for Diffraction Gratings

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Communications in Computational Physics 2006年第6期1卷 984-1009页

作者： A.Rathsfeld G.schmidt B.H.Kleemann Weierstrass Institute for Applied Analysis and Stochastics Mohrenstr.3910117 BerlinGermany Carl Zeiss AG Corporate Research and TechnologyOptical Design73446 OberkochenGermany

The integral equation method for the simulation of the diffraction by optical gratings is an efficient numerical tool if profile gratings determined by simple crosssection curves are *** method in its recent version is capable to tackle profile curves with corners,gratings with thin coated layers,and diffraction scenarios with unfavorably large ratio period over *** discuss special implementational issues including the efficient evaluation of the quasi-periodic Green kernels,the quadrature algorithm,and the iterative solution of the arising systems of linear ***,as an example we present the simulation of echelle gratings which demonstrates the efficency of our approach.

关键词： Diffraction gratings integral equation method preconditioning

Influence of direct electric current on wetting behavior during brazing

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Frontiers of Mechanical Engineering 2020年第3期15卷 496-503页

作者： Kirsten BOBZIN Wolfgang WIETHEGER Julian HEBING Lidong ZHAO Alexander schmidt Riza ISKANDAR Joachim MAYER Surface Engineering Institute(IOT) RWTH Aachen University52072 AachenGermany Central Facility for Electron Microscopy RWTH Aachen University52074 AachenGermany

The wetting behavior of liquid metals is of great importance for many processes. For brazing, however, a targeted modification beyond the adjustment of conventional process parameters or the actual set-up was not possible in the past. Therefore, the effect of direct electric current along the surface of a steel substrate on the wetting behavior and the formation of the spreading pattern of an industrial nickel-based filler metal was investigated at a temperature above T = 1000 °C in a vacuum brazing furnace. By applying direct current up to I = 60 A the wetted surface area could be increased and the spreading of the molten filler metal could be controlled in dependence of the polarity of the electric current. The electric component of the Lorentz force is supposed to be feasible reasons for the observed dependence of the electrical polarity on the filler metal spreading direction. To evaluate the influence of the electric current on the phase formation subsequent selective electron microscope analyses of the spreading pattern were carried out.

关键词： brazing electric current assisted wetting Lorentz force