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  • 1
    Online Resource
    Online Resource
    The Strait of Gibraltar : A Field Laboratory to Analyze Biological Response to Physical Forcing. (2010)
    Hauppauge :Nova Science Publishers, Incorporated,
    Details
    Keywords: Tides -- Gibraltar, Strait of. ; Tidal currents -- Gibraltar, Strait of. ; Biogeochemical cycles -- Gibraltar, Strait of. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (78 pages)
    Edition: 1st ed.
    ISBN: 9781617614064
    Series Statement: Oceanography and Ocean Engineering
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=3019237
    DDC: 551.46/1381
    Language: English
    Note: Intro -- Library of Congress Cataloging-in-Publication Data -- Contents -- Preface -- Introduction -- Flows, Tides and -- Associated Hydrology -- in the Strait of Gibraltar -- 2.1. Long-Term Dynamics -- 2.2. Subinertial Dynamics -- 2.3. Tidal Dynamics -- 2.4. Subtidal Dynamics. Large Amplitude Internal Waves -- Along-Strait Dynamics. -- Mixing and Advection -- 3.1. Models and Field Data Sampling Descriptions -- 3.1.1. Hydrodynamic Model -- 3.1.1.1. Mixing-Advection Model -- 3.1.1.2. Biogeochemical Model -- 3.1.2. Diel Cycle Sampling -- 3.1.3. DCM Sampling -- 3.2. 1D (Horizontally) Along-Strait Dynamics -- 3.2.1. Field Data -- 3.2.2. Model Simulations - Field Data Comparison -- 3.2.3. Some Conclusions About the 1D Dynamics -- 3.3. 2D-Tidally-Induced Vertical Pattern of Water Masses Circulation and Biogeochemical Signatures -- 3.3.1. Identified Chlorophyll Maxima -- 3.3.2. Tidal Dependence of Water Masses Circulation and DCM Positions -- Hypotheses, Evidences and Proofs of the Tidally-Induced Coastal-Channel Interactions -- in the Strait -- 4.1. Plankton Distribution Pattern and Physical Forcing at the Camarinal Sill -- 4.1.1. Cast 1 (Westward Hauling- Eastward Tidal Flow) -- 4.1.2. Cast 2 (Eastward Hauling- Westward Tidal Flow) -- 4.1.3. Evidences of Quick Changes and Coastal-Channel Interactions over the Camarinal Sill -- 4.2. Direct Evidences of Coastal-Channel-Tidally-Induced Interactions -- 4.2.1. Field Data and Modelling Results -- Conclusion -- References -- Index.
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    GEOMAR EBL
  • 2
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    Global distributions of picophytoplankton abundance and biomass - Gridded data product (NetCDF) - Contribution to the MAREDAT World Ocean Atlas of Plankton Functional Types (2012)
    PANGAEA
    Details
    Publication Date: 2023-03-27
    Description: The smallest marine phytoplankton, collectively termed picophytoplankton, have been routinely enumerated by flow cytometry since the late 1980s, during cruises throughout most of the world ocean. We compiled a database of 40,946 data points, with separate abundance entries for Prochlorococcus, Synechococcus and picoeukaryotes. We use average conversion factors for each of the three groups to convert the abundance data to carbon biomass. After gridding with 1° spacing, the database covers 2.4% of the ocean surface area, with the best data coverage in the North Atlantic, the South Pacific and North Indian basins. The average picophytoplankton biomass is 12 ± 22 µg C L-1 or 1.9 g C m-2. We estimate a total global picophytoplankton biomass, excluding N2-fixers, of 0.53 - 0.74 Pg C (17 - 39 % Prochlorococcus, 12 - 15 % Synechococcus and 49 - 69 % picoeukaryotes). Future efforts in this area of research should focus on reporting calibrated cell size, and collecting data in undersampled regions.
    Keywords: MAREMIP; MARine Ecosystem Model Intercomparison Project
    Type: Dataset
    Format: application/zip, 6.6 MBytes
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    DATA PANGAEA
  • 3
    Electronic Resource
    Electronic Resource
    Experimental analysis of the in vivo chondrogenic potential of the interdigital mesenchyme of the chick leg bud subjected to local ectodermal removal
    Amsterdam : Elsevier
    Developmental Biology 132 (1989), S. 368-374 
    Details
    ISSN: 0012-1606
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0012-1606(89)90233-9
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Experimental analysis of the role of ECM in the patterning of the distal tendons of the developing limb bud
    Amsterdam : Elsevier
    Cell Differentiation and Development 30 (1990), S. 97-108 
    Details
    ISSN: 0922-3371
    Keywords: Collagen type 1 ; Extracellular matrix ; Limb morphogenesis ; Tenascin ; Tendon patterning
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0922-3371(90)90078-B
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Endocardial pores in the sinus venosus and atrium of the dogfish (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 47 (1995), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A scanning electron microscopy study showed the presence of large pores in the endocardium of the sinus venosus of the dogfish Scyliorhinus canicula. The pores were always found on large bundles which protruded into the cardiac lumen. The bundles were mainly constituted of granule-containing nerve fibres. The average diameter of the pores was 3.2 μm (range=1.5-5.0μm), and their density, was about 822 pores mm−2. Endocardial pores were absent in other areas of the sinus venosus, but they were observed on the little bundles of granulated nerve fibres which were scattered throughout the atrium. The existence of large endocardial pores associated with bundles of granulated nerve fibres supports the hypothesis for the neuroendocrine nature of the elasmobranch sinus venosus wall.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1995.tb06001.x
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    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Optimization of absorbing potentials
    Amsterdam : Elsevier
    Chemical Physics Letters 228 (1994), S. 672-677 
    Details
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-2614(94)01001-3
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    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Immunolocalization of the transcription factor Slug in the developing avian heart (2000)
    Springer
    Anatomy and embryology 201 (2000), S. 103-109 
    Details
    ISSN: 1432-0568
    Keywords: Key words Cardiac morphogenesis ; Slug ; Epicardium ; Cushion mesenchyme ; Epithelial-mesenchymal transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Slug is a transcription factor involved in processes such as the formation of mesoderm and neural crest, two developmental events that imply a transition from an epithelial to a mesenchymal phenotype. During late cardiac morphogenesis, mesenchymal cells originate from two epithelia – epicardial mesothelium and cushion endocardium. We aimed to check if Slug is expressed in these systems of epithelial-mesenchymal transition. We have immunolocated the Slug protein in the heart of quail embryos between Hamburger and Hamilton stages HH16 and HH30. In the proepicardium (the epicardial primordium), Slug was detected in most cells, mesothelial as well as mesenchymal. Slug immunoreactivity was strong in the mesenchyme of the endocardial cushions and subepicardium from its inception until HH24, but the immunoreactivity disappeared in later embryos. Only a small portion of the endocardial cells located in the areas of epithelial-mesenchymal transition (atrioventricular groove and outflow tract) were immunolabelled, mainly between HH16 and HH20. Endocardial cells from other cardiac segments were always negative, except for a transient, weak immunoreactivity that coincided with the development of the intertrabecular sinusoids of the ventricle. In contrast, virtually all cells of the epicardial mesothelium were immunoreactive until stage HH24. The mesenchymal cells that migrate to the heart through the spina vestibuli were also conspicuously immunoreactive. The myocardium was not labelled in the stages studied. Our results stress the involvement of Slug in the epithelial to mesenchymal transition. We suggest that Slug can constitute a reliable marker of the cardiac epithelial cells that are competent to transform into mesenchyme as well as a transient marker of the epithelial-derived mesenchymal cells in the developing heart.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00008230
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Interdigital chondrogenesis and extra digit formation in the duck leg bud subjected to local ectoderm removal (1992)
    Springer
    Anatomy and embryology 186 (1992), S. 27-32 
    Details
    ISSN: 1432-0568
    Keywords: Duck embryo ; Limb development ; Chondrogenesis ; Cell death
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the chick embryo the interdigital tissue in the stages previous to cell death exhibits in vitro a high chondrogenic potential, and forms extra digits when subjected in vivo to local ectodermal removal. In the present work we have analyzed the chondrogenic potential both in vivo and in vitro of the interdigital mesenchyme of the duck leg bud. As distinct from the chick, the interdigital mesenchyme of the duck leg bud exhibits a low degree of degeneration, resulting in the formation of webbed digits. Our results show that duck interdigital mesenchyme exhibits also a high chondrogenic potential in vitro until the stages in which cell death starts. Once cell death is finished chondrogenesis becomes negative and the interdigital mesenchyme forms a fibroblastic tissue. In vivo the interdigital mesenchyme of the duck leg bud subjected to ectoderm removal forms ectopic foci of chondrogenesis with a range of incidence similar to that in the chick. Unlike those of the chick the ectopic cartilages of the duck are rounded and smaller, and appear to be located at the distal margin of the interdigital mesenchyme. Formation of extra digits in the duck occurs with a lower incidence than in the chick. It is concluded that ectopic chondrogenesis and formation of extra digits is related to the intensity of interdigital cell death. The non-degenerating interdigital mesenchymal cells destined to form the interdigital webs of the duck appear to contribute very little to the formation of interdigital cartilages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00710399
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    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Structural arrangement of the extracellular matrix network during myocardial development in the chick embryo heart (1991)
    Springer
    Anatomy and embryology 184 (1991), S. 451-460 
    Details
    ISSN: 1432-0568
    Keywords: Extracellular matrix ; Ventricular myocardium ; Chick embryo
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We analyzed the extracellular matrix and the connective tissue of the developing chick myocardium (“myocardial interstitium”). The importance of this myocardial element for heart function has been well documented both for the normal and pathologic adult hearts. However, little information is available on the organization of the embryonic myocardial interstitium and its modifications during development and increasing intracardiac pressure. In the present study we used light and scanning electron microscopic techniques, and lectin probes to study the interstitium of the ventricular myocardium of chick embryos from stage 29 (day 6 of development) until hatching. Our observations trace the progressive appearance and organization of the elements of the extracellular matrix, comprising the epimysium, perimysium and endomysium, which form a well-defined architectural network. Finally, we discuss the role of these elements of the extracellular matrix and their possible relation with the biomechanical properties of developing heart.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01236051
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  • 10
    Electronic Resource
    Electronic Resource
    Modification of the phalangeal pattern of the digits in the chick embryo leg bud by local microinjection of RA, staurosporin and TGF β's (1993)
    Springer
    Anatomy and embryology 188 (1993), S. 201-208 
    Details
    ISSN: 1432-0568
    Keywords: Chick limb bud ; Digit formation ; Retinoic acid ; Staurosporin ; Growth factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Many experimental studies show that in the avian chick limb the digits are specified at early stages of development by characteristic concentrations within the limb mesoderm of a still unidentified morphogen diffusing from the posterior margin of the bud, linked with a specifie pattern of homeobox gene expression. In ail these studies, digits are distinguished by their size, morpholgy and phalangeal pattern rather than by their position within the autopodium. In this work we report the induction of digits that have otherwise normal morphology but lack an interphalangeal joint. This suggests that the patterning of these joints is not necessarily linked to the control of the outgrowth of the digital rays. Missing interphalangeal joints were induced by microinjection into the third interdigital space of the leg bud of stage 28 to 31 chick embryos of retinoic Acid (RA), staurosporine and TGF β1 and β2, but not by microinjection of FGF or EGF. Our results also suggest that the pattern of insertion of the long tendons and the formation of the flexor cutaneous pad at the plantar surface of the digits are both linked to the establishment of the interphalangeal joints.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186253
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    Paper (German National Licenses)
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