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  • 1
    Electronic Resource
    Electronic Resource
    Application of Gibberellic Acid to Strawberry Plants at Different Stages of Development (1963)
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 95-96 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To examine further the effect of different application times solutions of 12-5, 25, 50 and 75 p.p.m. gibberellic acid, to which had been added 'Agral 90' wetter, were sprayed over triplicate randomized plots of one-year old Royal Sovereign plants on March 6, April 13, or May 30 and at all ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/197095b0
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  • 2
    Electronic Resource
    Electronic Resource
    Microflora of Creêpe Rubber (1954)
    [s.l.] : Nature Publishing Group
    Nature 173 (1954), S. 506-506 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As a part of a programme of research on the application of bactericides and fungicides to raw and vulcanized rubbers, initiated by the Rubber Service Laboratories of I.C.I., Ltd., in collaboration with ourselves, samples of discoloured cripe, obtained from Ceylon5, were incubated in moist chambers ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/173506a0
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  • 3
    Electronic Resource
    Electronic Resource
    Electron diffraction from phospholipids – an approximate correction for dynamical scattering and tests for a correct phase determination (1993)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 26 (1993), S. 778-786 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: An approximate experimental correction of electron diffraction intensities from an epitaxically crystallized phospholipid bilayer for dynamical scattering is described. This correction, which is useful for certain low-angle centrosymmetric data sets, compares intensities recorded at high and low electron-accelerating voltages to ascertain which reflections are most affected by n-beam interactions. When applied to experimental intensity data from 1,2-dihexadecyl-sn-glycerophosphoethanolamine (DHPE), the correction facilitates a direct phase determination based on the probabilistic estimate of three-phase invariants because a more accurate estimate of the hierarchy of |El| values is obtained. When a multisolution technique is used, incorporating algebraic unknowns for certain phase values, the best phase assignment can be assessed by comparison of the single convolution of phased structure factors to the observed structure-factor magnitudes for the low-voltage data. This approach exploits an approximate analogy made earlier by Moodie between the Sayre equation and the phase grating series and is valid as long as the single convolution adequately models experimental low-voltage data (a condition favored by light-atom structures in a low-angle region of reciprocal space). In real space, the correct structure can also be readily identified as the one having the smoothest density profile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889893005394
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamical scattering and electron crystallography - ab initio structure analysis of copper perbromophthalocyanine (1992)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 48 (1992), S. 562-568 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Electron diffraction intensity data were collected at 1200 kV from thin epitaxically oriented crystals of copper perbromophthalocyanine (C32Br16CuN8) in a projection down molecular columns. Measured cell constants for the projection with cmm symmetry are d100 = 17.88 (9), b = 26.46 (15) Å. The structure was determined by Fourier refinement after three heavy-atom positions were identified in an initial potential map. In addition to the copper and halogens, all light-atom positions were found. Although the final R value for all data is 0.41, n-beam dynamical calculations for crystal thicknesses corresponding to the estimated sample dimension account for the observed amplitudes that deviate most from their kinematical values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010876739200206X
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  • 5
    Electronic Resource
    Electronic Resource
    Thermal effects in electron-beam damage of organic crystals (1976)
    Springer
    Naturwissenschaften 63 (1976), S. 145-146 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600491
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  • 6
    Electronic Resource
    Electronic Resource
    Chemical and Topographical Surface Modification for Control of Central Nervous System Cell Adhesion (1998)
    Springer
    Biomedical microdevices 1 (1998), S. 49-64 
    Details
    ISSN: 1572-8781
    Keywords: surface texturing ; chemical patterning ; nanostructures ; self-assembled monolayers ; cell attachment ; lithography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract We describe methods of fine scale chemical and topographical patterning of silicon substrates and the selected attachment and growth of central nervous system cells in culture. We have used lithography and microcontact printing to pattern surfaces with self-assembled monolayers and proteins. Chemical patterns can be created that localize and guide the growth of cells on the surfaces. Self-assembled surface texturing with structures at the tens of nanometers scale and lithographic based methods at the micrometer scale have been used to produce a variety of surface topographical features. These experiments suggest that surface texture at the scale of tens of nanometers to micrometers can influence the attachment of these cells to a surface and can be used as a mechanism of isolating cells to a particular area on a silicon substrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009982306118
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  • 7
    Electronic Resource
    Electronic Resource
    Retrieval of thick sections from glass for high-voltage electron microscopy (1986)
    New York, NY : Wiley-Blackwell
    Journal of Electron Microscopy Technique 4 (1986), S. 69-71 
    Details
    ISSN: 0741-0581
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Natural Sciences in General
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jemt.1060040109
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  • 8
    Electronic Resource
    Electronic Resource
    Control of specimen orientation and environment (1989)
    New York, NY : Wiley-Blackwell
    Journal of Electron Microscopy Technique 11 (1989), S. 258-271 
    Details
    ISSN: 0741-0581
    Keywords: Specimen stages ; Tilting ; Heating ; Cooling ; Environmental chambers ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Natural Sciences in General
    Notes: Application of electron microscopy in a wide variety of fields of investigation has placed ever-expanding demands on the various components of the instrument. In situ specimen manipulation is one such demand and can often be critical to the success of an experiment. Control of specimen orientation is the most common manipulation, but control of a variety of other physical and chemical parameters may also be important. Temperature, gaseous and/or liquid environment, and mechanical operations are examples. Control and variation of these parameters in a small device (occupying a few cm3) operated in a strong magnetic field inside a vacuum system is often a considerable challenge. This must also be done at extreme stability: at least as good as the resolution limit of the microscope. Optimization of stage performance is too often sacrificed for optical performance or vice versa. The next generation of objective lenses and specimen stages are being designed in concert: an approach which should lead to an improved in situ laboratory, observed with optimum optics.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jemt.1060110405
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  • 9
    Electronic Resource
    Electronic Resource
    Confocal microscopy and three-dimensional reconstruction of electrophysiologically identified neurons in thick brain slices (1991)
    New York, NY : Wiley-Blackwell
    Journal of Electron Microscopy Technique 18 (1991), S. 11-23 
    Details
    ISSN: 0741-0581
    Keywords: Fluorescent microscopy ; Light microscopy ; Confocal light microscopy ; Neurobiology ; Hippocampus ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Natural Sciences in General
    Notes: Three-dimensional morphology and electrophysiology were correlated from individual neurons in a thick brain slice preparation. The hippocampal formation from immature and adult rats was cut transverse to the longitudinal axis into 500 μ Um-thick slices which were maintained under physiologic conditions. Individual neurons were impaled and physiologically characterized using microelectrodes. Recordings were made from the soma and in some cases from a dendrite. The impaled neurons were filled through the microelectrode with the fluorescent dye lucifer yellow and imaged by confocal scanning laser microscopy using an analog preprocessor. As many as 180 optical sections were recorded as a function of depth through the slices. Images are presented as a series of optical sections, stereo pairs, or three-dimensional reconstructions. Both stereo contouring and volume rendering methods were employed, and the reconstructions were viewed from any arbitrary perspective. Dendritic and axonal fields were separated from each other and displayed separately or as different pseudocolors. The three-dimensional reconstructions provided perspectives that were difficult or impossible to appreciate by viewing the optical sections or conventionally formed stereo pairs.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jemt.1060180104
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  • 10
    Electronic Resource
    Electronic Resource
    A simple specimen rotation tip for CTEM and HVEM (1986)
    New York, NY : Wiley-Blackwell
    Journal of Electron Microscopy Technique 3 (1986), S. 367-368 
    Details
    ISSN: 0741-0581
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Natural Sciences in General
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jemt.1060030313
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