Results 161 to 170 of about 7,945 (205)

On The Respiratory Flow in the Cuttlefish Sepia Officinalis

Journal of Experimental Biology, 1994
ABSTRACT The respiratory flow of water over the gills of the cuttlefish Sepia officinalis at rest is produced by the alternate activity of the radial muscles of the mantle and the musculature of the collar flaps; mantle circular muscle fibres are not involved. Inspiration takes place as the radial fibres contract, thinning the mantle and
Q, Bone, E, Brown, G, Travers
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The visual attack of the cuttlefish, Sepia officinalis

Animal Behaviour, 1968
Abstract 1. 1. The attack by Sepia on prawns comprises three phases: attention, positioning and seizure . 2. 2. In attention there are colour changes, erection of the first and second pair of arms and movements of the eyes and head. The whole animal turns (by up to 180 °) so that the prey comes to lie on a forward extension of the body ...
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Metal ion content in Sepia officinalis melanin

Marine Chemistry, 1992
Abstract A dissolution procedure for the analysis of the metal content in Sepia officinalis melanin has been optimized and checked against a bovine liver Community Bureau of Reference (BCR) certified reference material. The content of several metal ions has been determined by GF-AAS and ICP-AES techniques in samples of Sepia officinalis melanin ...
SARZANINI, Corrado, MENTASTI, Edoardo, ABOLLINO, Ornella, FASANO, Mauro, AIME, Silvio   +4 more
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The quaternary structure of Sepia officinalis haemocyanin

Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1986
Abstract The haemocyanin (Hc) of Sepia officinalis is constituted of ten identical subunits ( M r about 390 000), which consist of eight functional (dioxygen-binding) units, designated by the letters a–h . A model is proposed for the quaternary structure of this HC, based on immuno-electron microscopy of whole molecules and on morphological ...
Trijntje Wichertjes, Constant Gielens, Wilma G. Schutter, Gisèle Préaux, René Lontie, Ernst F.J. van Bruggen   +5 more
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The Influence of Photoperiodicity on Hatching ofSepia Officinalis

Journal of the Marine Biological Association of the United Kingdom, 1991
The influence of photoperiodicity on hatching ofSepia officinaliswas investigated under different experimental light-dark (LD) conditions. The results are viewed in relation to some relevant properties of the perivitelline fluid (PVF) and the egg capsule during embryonic development. In embryos ofS. officinalisthe transition from light to dark ap-pears
Paulij, W.P., Herman, P.M.J., Roozen, M.E.F., Denucé, J.M.   +3 more
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Allometry of thermal limitation in the cephalopod Sepia officinalis

Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2007
Cuttlefish (Sepia officinalis) routine metabolic rate was determined in response to acute thermal changes at a rate of 1 degrees C h(-1) for a variety of animal sizes (15-496 g wet mass, laboratory reared at 15 degrees C). In a thermal frame of 11 to 23 degrees C, oxygen consumption rates (MO(2), in mumol O(2) g(-1) min(-1)) were observed to rise with ...
Frank, Melzner, Christian, Bock, Hans-O, Pörtner   +2 more
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Sign tracking in cuttlefish (Sepia officinalis).

Journal of Comparative Psychology, 1999
Two groups of cuttlefish (Sepia officinalis) were used to demonstrate classical conditioning in this species and to determine whether the resulting approach response would be that of sign tracking or goal tracking. For cuttlefish in the paired condition, a flashing light was presented at one end of a long tank followed by food dropped into the center ...
J E, Purdy, A C, Roberts, C A, Garcia
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Melanogenesis in the Ink Gland of Sepia officinalis

Pigment Cell Research, 2003
Among the various melanin‐producing systems, the ink gland of the cuttlefish (Sepia officinalis) has traditionally been regarded as a most convenient model system for the studies of melanogenesis. The ink gland is a highly specialized organ with immature cells in the inner portion, from where the cells gradually mature, migrate towards the outer ...
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Superoxide dismutase in Sepia officinalis L.

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1981
Abstract 1. 1. Fractionation of a crude banchial gland extract of Sepia officinalis L. on a ACA-22 column resulted in five protein fractions. The presence of superoxide dismutase (SOD) was established in three of them (P3, P4 and P5). The bulk of the SOD activity was present in fraction P4. 2. 2. The enzyme was temperature sensitive.
G.H. Wolf, R. Heyneman, W. Decleir
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Immuno-EM of Sepia officinalis hemocyanin

1986
Negatively stained molecules of Sepia officinalis hemocyanin (Hc) (Mr 3.8×106) have the form of a partly hollow cylinder with 350 A diameter and 170 A height. The circular profiles show material inside the cylinder: the so-called collar which has 5-fold (or possibly 10-fold) symmetry (1). At higher pH values this Hc dissociates into five subunits, each
T. Wichertjes, C. Gielens, W. G. Schutter, G. Préaux, R. Lontie, E. F. J. van Bruggen   +5 more
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