Results 231 to 240 of about 1,368,843 (281)
Some of the next articles are maybe not open access.
Sea urchin DNA methyltransferases
Cell Biophysics, 1989DNA methyltransferase activities have been partially purified from unfertilized eggs and blastula nuclei of sea urchin embryos. Comparative studies, using different DNAs as substrates, show that the two preparations are most active on hemimethylated and single-strand DNA, but they methylate, though at a lower rate, also on double-strand DNA.
Tosi L +5 more
openaire +3 more sources
Biological Reviews, 1951
Summaryi. The head of the sea‐urchin spermatozoon is pear‐shaped and axially symmetrical. The sub‐microscopic morphology of the middle piece has not been investigated, but the tail, which terminates in an axial fibre, probably contains spiral or coiled structures, as in mammalian spermatozoa.2.
openaire +2 more sources
Summaryi. The head of the sea‐urchin spermatozoon is pear‐shaped and axially symmetrical. The sub‐microscopic morphology of the middle piece has not been investigated, but the tail, which terminates in an axial fibre, probably contains spiral or coiled structures, as in mammalian spermatozoa.2.
openaire +2 more sources
2004
Publisher Summary The chapter describes the structures and functions of sea urchin spermatozoa. Methods for the isolation of different parts of the sea urchin sperm are discussed. Sea urchin sperm are specialized for five functions: (1) oxidative phosphorylation to produce ATP, (2) flagellar motility, (3) the acrosome reaction, (4) binding to the egg,
Victor D, Vacquier, Noritaka, Hirohashi
openaire +2 more sources
Publisher Summary The chapter describes the structures and functions of sea urchin spermatozoa. Methods for the isolation of different parts of the sea urchin sperm are discussed. Sea urchin sperm are specialized for five functions: (1) oxidative phosphorylation to produce ATP, (2) flagellar motility, (3) the acrosome reaction, (4) binding to the egg,
Victor D, Vacquier, Noritaka, Hirohashi
openaire +2 more sources
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 +2 more
openaire +2 more sources
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 +2 more
openaire +2 more sources
Clinical Toxicology, 2005
A 25-year-old female was walking along a shallow tropical reef when she felt a sharp pain in her right great toe. Upon exiting the water, she noted multiple dark spines protruding from the foot.
openaire +2 more sources
A 25-year-old female was walking along a shallow tropical reef when she felt a sharp pain in her right great toe. Upon exiting the water, she noted multiple dark spines protruding from the foot.
openaire +2 more sources
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.
openaire +2 more sources
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.
openaire +2 more sources
2020
Extreme morphologies are often found in extreme conditions. Many commonalities exist in the morphology of deep and shallow-water sea urchins, but different evolutionary histories and adaptations to living at great depths have created peculiar and divergent morphologies within deep-sea sea urchins.
Stevenson, Angela, Kroh, Andreas
openaire +1 more source
Extreme morphologies are often found in extreme conditions. Many commonalities exist in the morphology of deep and shallow-water sea urchins, but different evolutionary histories and adaptations to living at great depths have created peculiar and divergent morphologies within deep-sea sea urchins.
Stevenson, Angela, Kroh, Andreas
openaire +1 more source
2019
Cilia are exceptionally complicated subcellular structures involved in swimming and developmental signaling, including induction of left-right asymmetry in larval stages. We summarize the history of research on sea urchin embryonic cilia. The high salt method to isolate cilia is presented first; methods to block cilia formation and to lengthen cilia ...
Robert L, Morris, Victor D, Vacquier
openaire +2 more sources
Cilia are exceptionally complicated subcellular structures involved in swimming and developmental signaling, including induction of left-right asymmetry in larval stages. We summarize the history of research on sea urchin embryonic cilia. The high salt method to isolate cilia is presented first; methods to block cilia formation and to lengthen cilia ...
Robert L, Morris, Victor D, Vacquier
openaire +2 more sources
International Journal of Biochemistry, 1975
Abstract 1. 1. Paramyosin-like protein was extracted and purified from the lantern muscle of sea urchins mostly of Pseudocentrotus depressus . 2. 2. The amino acid composition, the circular dichroism spectrum and the subunit molecular weight of this protein are characteristically similar to those of the known paramyosin, while the ...
Takashi Obinata +2 more
openaire +1 more source
Abstract 1. 1. Paramyosin-like protein was extracted and purified from the lantern muscle of sea urchins mostly of Pseudocentrotus depressus . 2. 2. The amino acid composition, the circular dichroism spectrum and the subunit molecular weight of this protein are characteristically similar to those of the known paramyosin, while the ...
Takashi Obinata +2 more
openaire +1 more source
Dermatology, 2005
Sea urchin granuloma is a chronic focal response to the puncture of sea urchin spines, induced by the permanence of prickle remnants in the wound. Until recent years, it was thought to represent a foreign body reaction but, following the description, in 2001, of its several histologic forms, the spectrum of its likely pathogenetic mechanisms has ...
CAPUTO, Valentina, FIORELLA, Santi
openaire +1 more source
Sea urchin granuloma is a chronic focal response to the puncture of sea urchin spines, induced by the permanence of prickle remnants in the wound. Until recent years, it was thought to represent a foreign body reaction but, following the description, in 2001, of its several histologic forms, the spectrum of its likely pathogenetic mechanisms has ...
CAPUTO, Valentina, FIORELLA, Santi
openaire +1 more source