Research theme for competitive and other funds (15):
2021 - 2024 真核生物のゲノム解析から探るシリカ被殻形態制御の進化と顕生代の古海洋環境
2018 - 2022 Origin and evolution of the silica fixation ability of polycystine radiolarians based on molecular phylogenetic analysis.
2015 - 2018 Origin of establishment of symbiotic relationship between radiolarians and the symbionts and evolution of the shell components based on the molecular phylogeny and the ultrastructural observations.
2011 - 2013 Evolution and origin of the chemical composition of radiolarian test during geologic time scale
2007 - 2009 Evolution of the ability to form a siliceous test of protists based on the molecular phylogeny
2007 - 2009 A study to develop the program for the environmental learning to foster scientific expression of children. -Through understanding patterns in natural things and phenomena-
2003 - 2005 Morphological and molecular evolution of Radiolaria based on the 18S rDNA study
2003 - 2005 A study for development of teacher traing program to nurture earth science lireracy through field activities in science.
TAKAHASHI, O., KAWABE, S., MITO, N. and YUASA, T. Longitudinal Changes in Roundness of Limestone and Chert Gravels During Downstream Transport: A Simple Experiment Using Plastic Bottles in the Classroom. Bull. Tokyo Gakugei Univ. Div. Nat. Sci. 2024. 76. 29-38
Osamu Takahashi, Takumi Maekawa, Paulian Dumitrica, Phong Duc Nguyen, Toshifumi Komatsu. Latentifistularia and other radiolarian species from the lower Smithian (Lower Triassic) Lang Son Formation, NE Vietnam. Revue de Micropaléontologie. 2022. 75. 100610-100610
Tomoko YUASA, Takeo HORIGUCHI, Osamu TAKAHASHI. Ultrastructural observation of a symbiotic dinoflagellate Zooxanthella nutricula from radiolarians collected off the northwestern coast of Okinawa Island, Japan. Galaxea, Journal of the Coral Reef Studies. 2022. 24. 105-117
Occurrence of relict latentifistularian (Polycystina, Radiolaria) species in the lower Smithian (Lower Triassic) Lang Son Formation, northeastern Vietnam
(2021)
砂岩の間隙率と続成作用についての中学生のイメージ-泡はどこから湧いてくるのか?-
(2019)
Observations of the reproductive swarmer cells of polycystine and acantharian radiolarians in the east China Sea
(2017)
Ultrastructure and molecular phylogeny of dinoflagellate symbiont from solitary polycystine radiolarian
(2012)
2006/03/24 - International Association of Radiolarian Paleontologists International Association of Radiolarian Paleontologists Best Oral Presentation Award Phaeodarians found a home? -molecular phylogenetic study of Phaeodarea
Association Membership(s) (4):
International Association of Radiolarists
, Japan Society of Earth Science Education
, Palaeontological Society of Japan
, Geological Society of Japan