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  • 1995-1999  (94)
  • 1985-1989
  • 1980-1984
  • 1999  (94)
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  • 1995-1999  (94)
  • 1985-1989
  • 1980-1984
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  • 1
    Electronic Resource
    Electronic Resource
    Desiccation and osmotic stress increase the abundance of mRNA of the tonoplast aquaporin BobTIP26-1 in cauliflower cells (1999)
    Springer
    Planta 209 (1999), S. 77-86 
    Details
    ISSN: 1432-2048
    Keywords: Key words: Aquaporin ; Brassica (cauliflower) ; Gene regulation ; Tonoplast ; Vacuole ; Water stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Changes in vacuolar structure and the expression at the RNA level of a tonoplast aquaporin (BobTIP26-1) were examined in cauliflower (Brassicaoleracea L. var. botrytis) under water-stress conditions. Gradual drying out of slices of cauliflower floret tissue caused its collapse, with a shrinkage in tissue and cell volumes and an apparent vesiculation of the central vacuole, whereas osmotic stress resulted in plasmolysis with a collapse of the cytoplasm and the central vacuole within. Osmotic stress caused a rapid and substantial increase in BobTIP26 mRNA in slices of floret tissue. Exposure of tissue slices to a regime of desiccation showed a slower but equally large rise in BobTIP26 mRNA followed by a rapid decline upon rehydration. In situ hybridization showed that BobTIP26-2 mRNA is expressed most highly in meristematic and expanding cells of the cauliflower florets and that desiccation strongly increased the expression in those cells and in differentiated cells near the xylem vessels. These data indicate that under water-deficit conditions, expression of the tonoplast aquaporin gene in cauliflower is subject to a precise regulation that can be correlated with important cytological changes in the cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004250050608
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  • 2
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    Desiccation and osmotic stress increase the abundance of mRNA of the tonoplast aquaporin BobTIP26-1 in cauliflower cells (1999)
    Springer
    Details
    Publication Date: 1999-07-19
    Print ISSN: 0032-0935
    Electronic ISSN: 1432-2048
    Topics: Biology
    Published by Springer
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    Magnetic domains in thin films with perpendicular anisotropy: An extensive study (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 4604-4606 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of tetragonal ordered alloys grown by molecular beam epitaxy provide a unique template for the study of magnetic configurations in thin films with perpendicular anisotropy. These configurations have been investigated by magnetic force microscopy over a wide thickness range, for large and weak perpendicular anisotropies, in both equilibrium and out of equilibrium states. FePd samples ordered into the tetragonal L10 structure have been obtained by simultaneous evaporation of Fe and Pd on Pd(100). These samples exhibit large perpendicular anisotropy. Magnetic domains have been imaged as a function of increasing thickness from 1.4 to 100 nm. Both an exponential decrease of the domain size at low thickness and a slow increase at higher thickness have been observed, allowing quantitative confirmation of the theoretical evolution expected. Due to this exponential decrease of their equilibrium size, the domains appearing at the beginning of growth exhibit a large size, well above the equilibrium one when the layer thickness is thereafter increased. The growth of the layer then leads to highly out of equilibrium magnetic configurations, where the domain shape evolves through wall undulation at low thickness and thereafter through a fingering instability. This fingering instability preserves large parts of the initial domains, allowing a quantitative estimation of the strain to which they are submitted. Samples grown with a low chemical order exhibit weak perpendicular anisotropy. The magnetization then lies into the plane below a critical thickness. Above this thickness, the images confirm the square root dependence of the period of the stripe structure upon thickness. Stripes as small as 37 nm have been observed. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370422
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrathin magnetic particles (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 6166-6168 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have fabricated ultrathin Co particles with various shapes, variable thicknesses δ (2 ML〈δ〈22 ML), and lateral size L ranging from 100 μm to (approximate)100 nm. We find that all particles are magnetized in-plane at room temperature and are in a single domain state, independently of shape and size—with some remarkable exceptions. We also find that the magnetic state of a particle can be manipulated without influencing the state of the neighbors. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370031
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  • 5
    Electronic Resource
    Electronic Resource
    Workplace solutions (1999)
    London : Emerald
    Journal ofcorporate real estate 1 (1999), S. 349-360 
    Details
    ISSN: 1463-001X
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: Real estate professionals are recognising the positive impact they can have on their corporation'scompetitiveness by providing workplace solutions that enhance individual and team performance. To develop successfully workplace solutions that meet both today's and tomorrow's needs of the organisation, the workplace design process must incorporate new ways of thinking about work; include team members who until recently were not involved in workplace design; and provide physical solutions that meet the definition of 'agile' (easily adaptable, flexible, and varied) environments. This paper discusses the evolution of work and the changes that have occurred in the workplace in an effort to meet these new workplace needs. The traditional models used for programming and planning the physical environment are no longer effective when dealing with workplaces for today's knowledge workers. The importance of developing new processes for identifying 'tomorrows' workplace requirements; the team members who must be involved to develop and implement these new solutions successfully; and the types of physical environments that must be created in order to enhance workplace and worker performance are all integral in the development of the high performanceworkplace.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/14630019910811132
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  • 6
    Electronic Resource
    Electronic Resource
    A movement-sensitive area in auditory cortex (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 400 (1999), S. 724-726 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It is important to recognize sound patterns, regardless of their position and motion. The ability to locate sound sources and track their motion involves various levels of the auditory pathways,. Motion and pattern analysis may first be spatially separated in the auditory cortex. We have ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/23390
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  • 7
    Electronic Resource
    Electronic Resource
    Numerical study of disk driven rotating MHD flow of a liquid metal in a cylindrical enclosure (1999)
    Springer
    Acta mechanica 135 (1999), S. 153-167 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary A numerical study of the steady laminar MHD flow driven by a rotating disk at the top of a cylinder filled with a liquid metal is presented. The governing equations in cylindrical coordinates are solved by a finite volume method. The effect of an axial magnetic field on the flow is investigated for an aspect ratioH/R equal to 1. The magnetic Reynolds number is assumed to be small whereas the interaction parameter,N, is large compared to unity. This allows to derive asymptotic results for the flow solution which are found in good agreement with the numerical calculations. The effect of the top, botton and vertical walls conductivity on the flow is studied. Various combinations of these conductivities are considered. The results obtained showed that one can control the primary flow through a good choice of the electrical conductivity of both the disk and cylinder walls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01305749
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  • 8
    Electronic Resource
    Electronic Resource
    Museum Informatics and Information Infrastructures: Supporting Collaboration across Intra-Museum Boundaries (1999)
    Springer
    Archives and Museum Informatics 13 (1999), S. 169-179 
    Details
    ISSN: 1573-7500
    Keywords: boundary objects ; collaboration ; cscw ; information infrastructures ; museum informatics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Information Science and Librarianship , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract This paper examines the development of an information infrastructure involving collaborative technologies at the Spurlock Museum, a museum of world history and culture at the University of Illinois. It details a socio-technological system that was designed to pack and re-locate 45,000 artifacts across campus to a new museum facility. It addresses the question of how the information infrastructure of the Spurlock promotes collaboration among the various departments at the museum working on this move and encourages the sharing of common data resources across internal museum boundaries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1016623607149
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  • 9
    Electronic Resource
    Electronic Resource
    Photosynthetic Characteristics of Three Asparagus Cultivars Differing in Yield (1999)
    Springer
    Crop science 39 (1999), S. 1070-1077 
    Details
    ISSN: 1435-0653
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Asparagus offincinalis L.) is poorly understood, but some reports have inferred a link between lateral fern photosynthesis (A) and annual spear yield. Gas exchange measurements were made on single lateral ferns of mature asparagus plants in the field and younger, potted plants. Among three cultivars with different levels of yield, the light-saturated rate of photosynthesis (Asat) was positively associated with crop yield in both sets of plants. There was a highly significant correlation between Asat and chlorophyll, and soluble protein concentrations across the cultivars. These data imply that differences in both gs and photosynthetic capacity contributed to the variation in Asat, and this was supported by A/CI (internal CO2 concentration) analysis. Variation in photosynthetic capacity was related to genotypic differences in cladophyll diameter and thus the content (per unit surface area) of photosynthetic biochemical constituents and, possibly, mesophyll resistance to CO2 diffusion. The possibility of genotypic variation in other photosynthetic parameters was also noted. It is concluded that fern A2sat might be a predictor of yield in asparagus, and of potential use in early selection for breeding, but confirmation of such a relationship requires investigation in a wider range of genotypes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/
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  • 10
    Electronic Resource
    Electronic Resource
    Isolation and characterization of mRNAs differentially expressed during ripening of wild strawberry (Fragaria vesca L.) fruits (1999)
    Springer
    Plant molecular biology 39 (1999), S. 629-636 
    Details
    ISSN: 1573-5028
    Keywords: cDNA cloning ; fruit ripening ; gene expression ; non-climacteric fruit ; wild strawberry (Fragaria vesca L.)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Wild strawberry (Fragaria vesca L.) is an attactive model system for studying ripening in non-climacteric fruit, because of its small diploid genome, its short reproductive cycle, and its capacity for transformation. We have isolated eight ripening-induced cDNAs from this species after differential screening of a cDNA library. The predicted polypeptides of seven of the clones exhibit similarity to database protein sequences, including acyl carrier protein, caffeoyl- CoA 3-O-methyltransferase, sesquiterpene cyclase, major latex protein, cystathionine γ-synthase, dehydrin and an auxin- induced gene. A ninth cDNA clone that was constitutively expressed is predicted to encode a metallothionein-like protein. None of these proteins appear to be directly related to events generally associated with ripening such as cell wall metabolism or the accumulation of sugars and pigments, rather, their putative functions are indicative of the wide range of processes upregulated during fruit ripening.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006179928312
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