Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Tsugio Shiroya"'
Publikováno v:
Development, Growth and Differentiation. 28:85-94
Only one form of acetylcholinesterase (AchE) was detected in Hemicentrotus pulcherrimus embryos. In H. pulcherrimus embryos as well as in the other sea urchin embryos, AchE activity begins to increase rapidly after gastrula stage. Purification of Ach
Publikováno v:
Journal of Radiation Research. 24:197-202
Morphological abnormalities due to UV partial irradiation to 8 or 16 cell embryos were studied in the sea urchin (Hemicentrotus pulcherrimus) embryo. UV irradiation on the animal hemisphere of 8, 16 cell embryos inhibited normal development at the ga
Autor:
Masaki Shioda, Tsugio Shiroya
Publikováno v:
Cell Differentiation. 20:11-16
DNA was extracted from embryos of the sea urchin, Hemicentrotus pulcherrimus , at the S phase and examined by electron microscopy. We detected replication microbubbles with a mean size of 404 bases, in addition to replication macrobubbles of more tha
Publikováno v:
Development, Growth and Differentiation. 29:317-322
In the sea urchin (Hemicentrotus pulcherrimus) embryo, the arylsulfatase activity is known to increase dramatically after the mesenchyme blastula stage. In the present experiment, we have studied the mechanism underlying this increase in the arylsulf
Publikováno v:
Photochemistry and Photobiology. 40:749-752
An action spectrum for photoreactivating enzyme activity from unfertilized eggs of the sea urchin Hemicentrotus pulcherrimus was determined. The range of the spectrum is 313 to 500 nm, with a maximum at 365 nm. Comparison of this spectrum with that f
Publikováno v:
RADIOISOTOPES. 37:568-571
The gamma irradiation system with variable effective half-life function has been developed, which provides the low dose rate gamma irradiation field by two 137Cs sources (3.7×1010 Bq and 7.4×1011 Bq) . This apparatus was designed to give an exposur
Publikováno v:
Photochemistry and Photobiology. 40:461-464
An action spectrum was obtained for photoreactivation (PR) of morphological abnormality arising from ultraviolet (UV)-irradiation of sea urchin sperm. The wavelength dependence of PR was measured by the restoration of the formation of normal pluteus
Autor:
Tsugio Shiroya, Yosuke Ejima
Publikováno v:
Photochemistry and Photobiology. 35:175-180
— Morphological abnormality due to the UV irradiation of sperm and its modification by photoreactivation (PR) were studied in the sea urchin, Hemicentrotus pukherrimus. When sperm was UV-irradiated and allowed to fertilize unirradiated eggs, the ef
Publikováno v:
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry. 88:147-152
1. 1. Arylsulfatase was extracted from sea urchin (Hemicentrotus pulcherrimus) plutei and purified to electrophoretical homogeneity by means of DEAE-cellulose, acetone fractionation and Sepharose CL-6B, successively. 2. 2. The molecular weight of thi
Autor:
Tsugio Shiroya, Yoshihiro Akimoto
Publikováno v:
Photochemistry and Photobiology. 45:407-412
— Morphological abnormalities induced by UV-irradiation of 8- or 16-cell-stage embryos of the sea-urchin, Hemicentrotus pulchenimus, and their photoreversal were studied. UV-irradiation of the animal hemisphere of embryos caused the formation of ex