Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Yukio Hiramoto"'
Autor:
Masaki Osawa, Munehiro Kikuyama, Hideyo Kuroda, Hiroyuki Uchiyama, Yukio Hiramoto, Kazuhisa Takemoto
Publikováno v:
Developmental Biology. 166:268-276
Fertilization is known to initiate a transient increase of intracellular calcium concentration and an accompanying change of membrane potential in sea urchin eggs. If the fertilization membrane and hyaline layer are removed, sperm can again enter fer
Publikováno v:
Development, Growth and Differentiation. 34:709-717
To investigate whether or not causal relationship exists between the increase in intracellular Ca2+ and other cortical reactions at fertilization in the medaka, Oryzias latipes, intracellular Ca2+ was determined from luminescence of aequorin previous
Autor:
Munehiro Kikuyama, Yukio Hiramoto
Publikováno v:
Development, Growth and Differentiation. 33:633-638
A transient increase in intracellular Ca2+ upon maturation in starfish oocyte was revealed by light emission of aequorin microinjected into the cell. One minute application of 1-methyladenine (1-MeAde) to a limited area of the oocyte surface was suff
Publikováno v:
Development, Growth and Differentiation. 33:479-490
The time sequence of early events in fertilization was examined in eggs of the medaka Oryzias latipes. The mean time after insemination required for sperm attachment to the egg surface through the micropyle depended on sperm concentrations. It was 3
Autor:
Yukio Hiramoto
Publikováno v:
Annals of the New York Academy of Sciences. 582:22-30
The changes in stiffness of the cell before and during cleavage reported previously for various kinds of echinoderm eggs are classified into three types. There is no general rule that cleavage starts when the stiffness attains a maximum or a minimum.
Publikováno v:
Development, Growth and Differentiation. 32:15-22
A method was developed to investigate the mechanical structure of the cytoplasm based on the movement of an intracellular gold particle subjected to centrifugal acceleration (the gold particle method). The movement of the particle in the cell was obs
Autor:
Yukio Hiramoto, Eiji Kamitsubo
The centrifuge microscope (CM) is composed of a centrifuge and a microscope optical system designed to observe minute objects, especially living cells, during the application of centrifugal acceleration. Structures and characteristics of various type
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddfcc937c9ee989f352164ebb449454b
https://doi.org/10.1016/s0074-7696(08)62157-9
https://doi.org/10.1016/s0074-7696(08)62157-9
Autor:
Sumio Ishijima, Yukio Hiramoto
Publikováno v:
Cell structure and function. 19(6)
The stiffness (flexural rigidity) of live sperm flagella, Triton-demembranated flagella (axonemes), trypsin-digested axonemes, and doublet microtubules of the axonemes in echinoderms was determined from the relationship between their deformation when
Publikováno v:
Developmental biology. 160(2)
Changes in the intracellular free calcium levels in the cortical region of cleaving Xenopus eggs were examined using semi-synthetic aequorin. We detected periodic oscillations in the free calcium levels accompanying the cleavage cycle as early as the
Publikováno v:
Plant and Cell Physiology.