ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    The cristalline morphology of catfish otoliths (1992)
    In:  EPIC3Copeia
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Statocyst, statolith, and age estimation of the giant squid, Architeuthis kirki (1994)
    California Malacozoological Society
    In:  Veliger, 37 (1). pp. 93-109.
    Details
    Publication Date: 2020-04-30
    Description: The statocyst and statolith of a mature female giant squid Architeuthis kirki Dell, 1970, caught in New Zealand waters are described. The organization of the chambers and internal projections of the statocyst can be interpreted as an analogue of a lamprey-like labyrinth with two semicircular canals. Size, sex, date of capture, and site of capture are reported for 24 A. kirki specimens caught in New Zealand waters from 1983 to 1988. A statolith from a specimen captured 3 May 1987 was sectioned and examined for microincrements, and the age assigned by assuming daily microincrementation. When size and date of capture are used to estimate annual growth rates, they yield rates similar to or slightly faster than those inferred from the statolith microincrements. Four different growth curves have been fitted to the length-at-age data: lowess (locally weighted least squares), exponential, logarithmic (power curve), and von Bertalanffy. Estimated von Bertalanffy curve parameters are k = 0.0036d-1, and L- infin = 2168 mm dorsal mantle length.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OCEANREP)
  • 3
    Electronic Resource
    Electronic Resource
    Periodic changes in the chemistry of the otolith of Macruronus novaezelandiae (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 9 (1993), S. 0 
    Details
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The sagittal otolith of Macruronus novaezelandiae (Merlucciidae; Teleostei) showed cycles of strontium, calcium, nitrogen, carbon and oxygen in proton microprobe traces along both the sulcal to anti-sulcal growth axis, and the dorso-ventral rowth axis of the otolith. The cycles of strontium in the dorso-ventral growth axis had peak-to-peai distances similar to those of annual peaks expected from daily microincrement estimates of age.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0426.1993.tb00390.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    A test of the lipofuscin technique of age estimation in fish (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 9 (1993), S. 0 
    Details
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A stable extraction technique was developed to quantify the lipofuscin content of fish brains. Samples of brains of the same age but different size rass carp showed that a large part of the variation in lipofuscin content was related to the weight of the fish.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0426.1993.tb00529.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Relationships between growth rate, serum esterase gene proportion and temperature in South Pacific skipjack tuna (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 9 (1993), S. 0 
    Details
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Variation in the proportions of serum esterase genetic polymorhisms drawn from samples of skipjack tuna (Katsuwonus elamis) has been used to identify geneticaty isolated stocks of K. pelamis in the South Pacific, based on the assumptions that variation in serum esterase gene proportion was essentially stochastic; such aruments are shown to be unacceptable. There is evidence that serum esterases may be involved in the deknsive resonses of vertebrates to parasites, and that genetic variation at a number of loci may be related to growth rate. It can be shown in a large proportion of samples that serum esterase gene proportion in K. pelamis was correlated to measures of growth rate. This implies that the Pacific-wide variation in esterase proportions in skipjack tuna may be due to local selection gradients involving growth rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0426.1993.tb00391.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    A carbon-13 method for evaluating degradation of starch-based polymers (1994)
    Springer
    Journal of polymers and the environment 2 (1994), S. 201-209 
    Details
    ISSN: 1572-8900
    Keywords: Biodegradation ; stable isotope ; starch-based polymer ; carbon-13
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new method for evaluating biodegradability of starch-based and certain other polymer blends uses the pre- and postexposure stable carbon isotope composition of material coupled with weight loss data to determine which components have degraded. The naturally occurring stable isotope of carbon.13C, is enriched in corn starch (δ13C, approx. −11‰) compared to petroleum-derived synthetic polymers (δ13C, approx. −32‰). Results on starch-synthetic polymer blends indicate that the δ13C signatures of these blends are near-linear mixtures of their component δ13C. Values of a δ13C for starch-synthetic polymer blends exposed to biologically active laboratory soil and artificial seawater conditions are depleted in13C compared to unexposed samples, suggesting loss of the starch component. Combined with weight loss data for the exposed samples, the δ13C values are statistically consistent with models requiring loss of the soluble component glycerin, followed by loss of starch, then petrochemical polymer, or simultaneous loss of starch and petrochemical polymer. Replicate δ13C analyses of starch-synthetic polymer blends increase the statistical power of this relatively inexpensive, accessible technique to discriminate between degrading components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02067446
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Continuous and discontinuous growth in the otolith of Macruronus novaezelandiae (Merlucciidae: Teleostei) (1993)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 216 (1993), S. 271-294 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Viewed by transmitted light, the lapillus and astericus otoliths Macruronus novaezelandiae (Merlucciidae) contain radial bands of similar width to the distances between steps on the surface of the otolith. The sagitta otolith has a multi-prismatic structure and shows differences in ultrastructure between its dorsal and ventral growth axes, as well as its sulcal (inward-facing) and anti-sulcal (outward-facing) parts. The ultrastructure of the sagitta shows that not all of the optical and etched checks in the central growth axis represent true discontinuities in the crystal growth of the otolith; they are the result of refraction around narrow optically active refractive bands. Microincrement growth along the dorsal prisms of the otolith from the primordium to the growing edge shows discontinuities in crystal growth at the boundary of the primordium and at the intersection of prisms. Parts of the ventral edge of the otolith show discontinuous crystal growth apparently caused by the physical growth restriction at the point at which the otolith is supported by the skull. Both the anti-sulcal and sulcal parts of the otolith often show discontinuities in the crystal structure alongside zones of continuous microincrement deposition, or evidence of continuous crystal growth, documenting simultaneous continuous and discontinuous growth in closely juxtaposed parts of the same otolith. © 1993 Wiley-Liss, Inc.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1052160304
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Raman spectral study of solid and dissolved poly(vinyl alcohol) and ethylene-vinyl alcohol copolymer (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 1163-1174 
    Details
    ISSN: 0887-6266
    Keywords: poly(vinyl alcohol) ; raman spectroscopy ; polymer ; aqueous solution ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: We have measured the Raman spectra of ethylene-vinyl alcohol copolymer (EVOH) and poly(vinyl alcohol) (PVOH). Spectra of 88% hydrolyzed PVOH were examined from the partially crystalline solid, from PVOH dissolved in both H2O and D2O, and from films precipitated from these solutions. The spectrum in H2O differs from that of the starting material by disappearance of sharp bands having Raman shift values of 1146 and 1093 cm-1, strengthening of a band near 915 cm-1, decrease in frequency of bands at 480, 1356, and 1441 cm-1, and increase in frequency of bands at 369, 413, 1023, 1371, and 2910 cm-1. The spectrum of the film shows partial reversal of these trends. With D2O as the solvent, the band shifts are slightly different from those listed above and new bands appear. These changes are indicative of loss of crystallinity, change in stereochemistry, and partial deuteration of hydroxyl during dissolution of this PVOH sample at room temperature. © 1994 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090320704
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Polymorphic crystalline structure of fish otoliths (1993)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 218 (1993), S. 1-28 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Although most otoliths of teleost fishes contain aragonite, a detailed survey of the otoliths of serveral species confirms that other crystalline forms of calcium carbonate occur. Otoliths of Hoplostethus atlanticus, Pagrus major, Macruronus novaezelandiae, Merluccius australis, Congiopodus coriaceus, Kathetostoma giganteum, Argentina elongata, Rhomobosolea tapirina, Neophrynichthys latus, Coelorinchus aspercephalus, Paranothothenia microlepidota, and Gonorhynchus gonorhynchus contained the aragonite, calcite, and vaterite morphs of calcium carbonate in varying proportions. Aragonitic otoliths of Allocyttus niger, Hoplostethus altlanticus, and Pagrus major contained sequences of calcite-like crystals. The surface of the vateritic otolith of Acipenser brevirostrum is shown in detail. Three classes of information are stored in the crystalline structure of the otolith: shape conservation, coexisting crystal morphs, and consecutive changes in crystal morph. Analysis of this crystalline information supports the hypothesis of control of growth of the otolith by proteins from the sensory epithelium or macula. Protein variation involved may be genetic in origin, or non-genetic arising from “stuttering” of the translation process. Proteins extracted from vateric and aragonitic morphs of the otolith of Macruronus novaezelandiae showed differences in infared absorption spectra that were consistent with two different amino acid sequences. © 1993 Wiley-Liss, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1052180102
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...