Results 241 to 250 of about 1,447,789 (299)

Sea Urchin Morphogenesis

2016
In the sea urchin morphogenesis follows extensive molecular specification. The specification controls the many morphogenetic events and these, in turn, precede patterning steps that establish the larval body plan. To understand how the embryo is built it was necessary to understand those series of molecular steps.
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Apoptosis in Sea Urchin Embryos

Biochemical and Biophysical Research Communications, 1997
It is demonstrated by DNA electrophoresis analysis, morphological observations and TdT in situ reaction, that Paracentrotus embryos if treated with TPA plus heat undergo an apoptotic reaction. Indication is also obtained that non treated embryos undergo spontaneous apoptosis at the early pluteus stage, especially in the districts of arms and intestine.
M C, Roccheri, G, Barbata, F, Cardinale, C, Tipa, L, Bosco, O A, Oliva, D, Cascino, G, Giudice   +7 more
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Activation of Sea Urchin Gametes

Annual Review of Cell Biology, 1986
CONTENTS INTRODUCTION .••••••••........ 1 SPERMATOZOA . .. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . ...... . . . . . . . . . . . .. . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . 3 Activation of Motility and Respiration... . . . . . . . . . . . . . . . . . . . . .
J S, Trimmer, V D, Vacquier
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Injuries From Sea Urchins

Southern Medical Journal, 1977
Injuries from sea urchins result from penetration of the calcareous spines into the skin. Local pain of several days' duration is the most common symptom, but systemic reaction from toxins found in certain species can occur. There is no uniformly accepted successful treatment other than cleansing the wound.
HOWARD P. BADEN, null Boston, JOSEPH W. BURNETT   +2 more
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The chromatin of sea urchin sperm

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression, 1987
Digestion of sea urchin sperm nuclei with micrococcal nuclease yields nucleosomal monomer fragments of 151 and 164 base pairs. Prior trypsin treatment of the sperm chromatin does not alter the size of these monomer DNA fragments despite the fact that the H1 histone is reduced to a limit globular peptide of about 83 residues. Heterologous reconstitution
P, Puigdomenech, M C, Romero, J, Allan, P, Sautière, V, Giancotti, C, Crane-Robinson   +5 more
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Sea Urchin Granuloma of the Skin

Archives of Dermatology, 1962
Clinical manifestations after injury by spines of the sea urchin only have been reported in France, 1,2 but today interest in the new sport of skin diving adds greater significance to this report dealing with the case of a skin diver. Skin divers, when fishing under water, may lose their exact sense of distance and frequently strike their hands ...
G, ROCHA, S, FRAGA
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The Complement System in Sea Urchins

2001
Comparative immunology had its origin in the studies of inflammation by Elie Metchnikoff who proposed that the primary effectors of the immune response were circulating, amoeboid, phagocytic cells (Metchnikoff, 1891). In order to support this proposal, Metchnikoff reported that the bipinnaria larvae of a sea star would respond to physical injury (the ...
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Serendipity and Sea Urchins

The Biological Bulletin, 2022
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Sea urchin granuloma: a chronic complication of sea urchin spine injuries

QJM: An International Journal of Medicine, 2023
Yuki Muroyama, Masato Nagumo, Fumiyoshi Fujishima, Takashi Suzuki   +3 more
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Bioaccumulation of persistent and emerging pollutants in wild sea urchin Paracentrotus lividus

Environmental Research, 2018
C. Rocha, C. Camacho, E. Eljarrat, A. Peris, Y. Aminot, J. Readman, V. Boti, Christina Nannou, A. Marques, M. Nunes, M. C. Almeida   +10 more
semanticscholar   +1 more source