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  • Articles  (4)
  • Cell plate positioning  (1)
  • Cocaine-Related Disorders/physiopathology  (1)
  • Deconvolution  (1)
  • Hill reaction  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The presence of extended phragmosomes containing cytoskeletal elements in fusiform cambial cells ofFraxinus excelsior L. (1984)
    Springer
    Protoplasma 122 (1984), S. 145-152 
    Details
    ISSN: 1615-6102
    Keywords: Fraxinus excelsior L. ; Dividing fusiform cambial cells ; Phragmosome ; Cytoskeletal elements ; Microtubules ; Cell plate positioning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Fusiform cambial cells of the ash (Fraxinus excelsior L.), which are strongly elongated and vacuolated, contain a phragmosome which traverses the whole length of the cells during preprophase and karyokinesis and which remains present during cytokinesis until it is integrated in cell plate with adjacent cytoplasm. The phragmosome consists of a thin perforated cytoplasmic layer located in the plane of the future cell plate. Otherwise oriented transvacuolar cytoplasmic layers or strands are not present in these cells. The phragmosome contains cytoskeletal elements, namely microtubules and also microfilament bundles both of which are oriented mainly in longitudinal direction. The phragmosomal microtubules are a new category of microtubules associated with cell division; presumably they guide the centrifugally growing cell plate to the parental cell wall site previously marked by the preprophase band of microtubules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01279448
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Inhibition of oxygen evolution by zaluzanin C (1992)
    Springer
    Journal of chemical ecology 18 (1992), S. 1891-1900 
    Details
    ISSN: 1573-1561
    Keywords: Zaluzanin C ; Zaluzania triloba ; chloroplast ; oxygen evolution ; inhibition ; Hill reaction ; photosystem I ; photosystem II
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The inhibition of ATP synthesis, proton uptake, and electron transport (basal, phosphorylating, and uncoupled) from water to methylviologen by zaluzanin C indicates that it acts as an electron transport inhibitor. Uncoupled photosystem I electron transport rate was not affected by zaluzanin C; however, uncoupled photosystem II electron flow from water to 2,3,5,6-tetramethyl phenylenediamine and from water to silicomolybdate was inhibited, but electron transport from diphenylcarbazide to silicomolybdate was not affected. We conclude that the site of inhibition by zaluzanin C is located at the oxygen evolution level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00981914
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  • 3
    Electronic Resource
    Electronic Resource
    Reliable and efficient deconvolution technique based on total linear least squares for calculating the renal retention function (1987)
    Springer
    Medical & biological engineering & computing 25 (1987), S. 26-33 
    Details
    ISSN: 1741-0444
    Keywords: Deconvolution ; Renography ; Retention function ; Singular value decomposition ; Total linear least squares
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract By deconvolving the activity/time curves obtained from the blood and kidney, the renal retention function can be calculated, yielding useful clinical data. However, the current deconvolution techniques are not very reliable; they are sensitive to the inaccuracies present in the data. A more reliable, stable and efficient deconvolution technique based on the singular value decomposition, total linear least squares (TLLS), is proposed and its properties are described. The applicability of TLLS as a deconvolution technique in renography is discussed and demonstrated. Results from simulation, as well as from clinical data, are presented to show the advantages of the use of TLLS with respect to noise rejection in the data. They confirm the superiority of TLLS over the current deconvolution techniques. It is concluded that TLLS needs no smoothing and is a powerful, efficient, reliable and stable deconvolution technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02442816
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  • 4
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    Cocaine disinhibits dopamine neurons by potentiation of GABA transmission in the ventral tegmental area (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-09-28
    Description: Drug-evoked synaptic plasticity in the mesolimbic system reshapes circuit function and drives drug-adaptive behavior. Much research has focused on excitatory transmission in the ventral tegmental area (VTA) and the nucleus accumbens (NAc). How drug-evoked synaptic plasticity of inhibitory transmission affects circuit adaptations remains unknown. We found that medium spiny neurons expressing dopamine (DA) receptor type 1 (D1R-MSNs) of the NAc project to the VTA, strongly preferring the GABA neurons of the VTA. Repeated in vivo exposure to cocaine evoked synaptic potentiation at this synapse, occluding homosynaptic inhibitory long-term potentiation. The activity of the VTA GABA neurons was thus reduced and DA neurons were disinhibited. Cocaine-evoked potentiation of GABA release from D1R-MSNs affected drug-adaptive behavior, which identifies these neurons as a promising target for novel addiction treatments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bocklisch, Christina -- Pascoli, Vincent -- Wong, Jovi C Y -- House, David R C -- Yvon, Cedric -- de Roo, Mathias -- Tan, Kelly R -- Luscher, Christian -- New York, N.Y. -- Science. 2013 Sep 27;341(6153):1521-5. doi: 10.1126/science.1237059.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Basic Neurosciences, Medical Faculty, University of Geneva, CH-1211 Geneva, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24072923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cocaine/*pharmacology ; Cocaine-Related Disorders/physiopathology ; Dopaminergic Neurons/*metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Neuronal Plasticity/drug effects ; Synaptic Transmission/drug effects/physiology ; Ventral Tegmental Area/*metabolism ; gamma-Aminobutyric Acid/*drug effects/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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