A5038326575- Geological and Geochemical Analysis
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Astro and Planetary Science
- Immune Response and Inflammation
- Geology and Paleoclimatology Research
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Planetary Science and Exploration
- High-Energy Particle Collisions Research
- Geochemistry and Geologic Mapping
- Insect and Pesticide Research
- Astrophysics and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Antimicrobial Peptides and Activities
- Probiotics and Fermented Foods
- Isotope Analysis in Ecology
- Effects and risks of endocrine disrupting chemicals
- Electrochemical Analysis and Applications
- Corrosion Behavior and Inhibition
- Analytical chemistry methods development
- Toxic Organic Pollutants Impact
Okayama University
2013-2024
Okayama University of Science
2021-2023
Kobe University
2010-2020
Kyoto University
2012
Kyushu University
2007
Japan Science and Technology Agency
2007
Kansai University
2006
Institute of Particle and Nuclear Studies
2003
High Energy Accelerator Research Organization
2003
University of the Ryukyus University Hospital
2001
Presented here are the observations and interpretations from a comprehensive analysis of 16 representative particles returned C-type asteroid Ryugu by Hayabusa2 mission. On average consist 50% phyllosilicate matrix, 41% porosity 9% minor phases, including organic matter. The abundances 70 elements in close agreement with those CI chondrites. Bulk show higher δ18O, Δ17O, ε54Cr values than As such, sampled most primitive least-thermally processed protosolar nebula reservoirs. Such finding is...
All life on Earth contains amino acids and carbonaceous chondrite meteorites have been suggested as their source at the origin of Earth. While many meteoritic are considered indigenous, deciphering extent terrestrial contamination remains an issue. The Ryugu asteroid fragments (JAXA Hayabusa2 mission), represent most uncontaminated primitive extraterrestrial material available. Here, concentrations from two particles different touchdown sites (TD1 TD2) reported. show that N,N-dimethylglycine...
Records of micrometeorite collisions at down to submicron scales were discovered on dust grains recovered from near-Earth asteroid 25143 (Itokawa). Because the sampled very near surface asteroid, by Hayabusa spacecraft, their surfaces reflect low-gravity space environment influencing physical nature exterior. The was examined description grain and asteroidal scenes reconstructed. Chemical O isotope compositions five lithic grains, with diameters 50 μm, indicate that uppermost layer...
Clothianidin (CTD) is a neonicotinoid developed in the 1990s as an insecticide having selective toxicity, but it was later found to cause reproductive abnormalities rats through oxidative stress. There attempt preserve endangered animals, including Japanese crested ibis, Japan. However, there concern that affects reproduction of this bird, since used its habitat. CTD toxicity birds poorly understood, so we investigated whether or not daily oral administration has any deleterious effects on...
Neonicotinoids, which were developed in the 1990 s as an insecticide having selective toxicity, later found to cause reproductive abnormalities experimental animals. In Japan there is attempt preserve endangered animals, including Japanese crested ibis, and a question of whether neonicotinoids affect reproduction this bird, since they are used its habitat. Hence, we investigated daily oral administration neonicotinoid clothianidin (CTD) has any deleterious effects on function mature male...
Abstract The analysis of samples returned from the C-type asteroid Ryugu has drastically advanced our knowledge evolution early solar system materials. However, no consensus been obtained on chronological data, which is important for understanding Ryugu. Here, aqueous alteration age particles was determined by Mn–Cr method using bulk samples, yielding an 4.13 + 0.62/−0.55 Myr after formation Ca–Al-rich inclusions (CAI). corresponds to 4563.17 0.60/−0.67 ago. higher 55 Mn/ 52 Cr, ε 54 and...
Abstract The NA61/SHINE experiment at the CERN Super Proton Synchrotron studies onset of deconfinement in strongly interacting matter through a beam energy scan particle production collisions nuclei varied sizes. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions mean multiplicities $$\pi ^\pm $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>±</mml:mo> </mml:msup> </mml:math> ,...
Although neonicotinoid pesticides are expected to have harmful influence on mammals, there is little animal experimental data support the effect and mechanisms. Since acetylcholine causes release of dopamine, neonicotinoids may confer a risk developmental disorders via disturbance in monoamine systems. Male mice were peripubertally administered dinotefuran (DIN) referring no observed level (NOEL) performed behavioral immunohistological analyses. In an open field test, total locomotor...
We have evaluated recovery yields of Zr, Nb, Hf and Ta, which are called high field strength elements (HFSE), in the synthetic Ca–Al–Mg–HF solution system using two different methods: at <70 °C an ultrasonic-bath (denoted as ultrasonic method) 205 a TFE Teflon® bomb method). Full HFSE into supernatant HF was not achieved cases where fluorite (CaF2) forms precipitate both methods sellaite (MgF2) method. In order to suppress precipitation, 'Al-addition method' developed Al is added sample...
Mechanisms of fractional crystallization with simultaneous crustal assimilation (AFC) are examined for the Kutsugata and Tanetomi lavas, an alkali basalt–dacite suite erupted sequentially from Rishiri Volcano, northern Japan. The major element variations within can be explained by boundary layer fractionation; that is, mixing a magma in main part body fractionated interstitial melt transported mushy at floor. Systematic SiO2 correlate Pb, Sr Nd isotopic compositions lavas. geochemical lavas...
In 1976, men who were exposed to the highest concentrations of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) after an explosion at a chemical plant near Seveso, Italy, produced more girls than boys. However, few studies have examined possibility that exposure laboratory animals TCDD, especially males, could lead lower male/female sex ratio. The aim this study was investigate whether direct paternal TCDD affects ratio offspring using relatively large-scale experimental design. Male ICR mice...
We present major and trace element concentrations Sr–Nd–Hf–Pb isotope data for the c. 13–2 Ma Tertiary lavas from eastern Iceland. Our new geochemical results, together with published geological, geochronological, geophysical data, are used to evaluate temporal changes in mantle sources contributing Icelandic magmatism relative roles of these magma productivity. The radiogenic isotopic compositions clearly distinguish three distinct end-member components magmatism. Temporal variations lava...
Neonicotinoids are pesticides used worldwide. They bind to insect nicotinic acetylcholine receptors (nAChRs) with high affinity. We previously reported that clothianidin (CTD), one of the latest neonicotinoids, reduced antioxidant expression and induced germ cell death in adult testis vertebrates. Here, we investigated male reproductive toxicity prenatal early postnatal exposure CTD, because it is likely developmental more severely affects compared adults due absence blood-testis barrier....
It has been suggested that an increase in the use of pesticides affects neurodevelopment, but there no animal experiment showing a causal relation between neonicotinoid (NNs) and depression. We examined whether dinotefuran (DIN), most widely used NN Japan, induces Male mice were administered DIN 3 8 weeks age, referring to no-observed-effect level (NOEL). The then subjected tail suspension test (TST) forced swimming (FST). After these tests, their brains dissected for immunohistochemical...
The absorption and the transportation of intestinally administrated bovine lactoferrin (LF) were immunohistochemically physiochemically investigated in small intestine growing pigs. At apical halves intestinal villi, LF was absorbed by transcytosis as vesicles through villous columnar epithelial cells. presence LF-positive membranes transcytotic suggests that mediated LF-binding factors on cell membranes. Almost all demonstrated to be transported via lymphatics portal vein into systemic...
Abstract We present a geochemical study on olivine and clinopyroxene‐hosted melt inclusions (MIs) from 2001 to 2006 Etna basaltic lavas pyroclastites. Three MI suites are distinguished the basis of trace element fingerprinting. Type‐1 MIs (from Upper South 2002 Northeast vents) share their signature with low‐K erupted before 1971. Critical ratios (e.g., K/La, Ba/Nb), along Pb isotope data provide evidence for heterogeneous mantle source resulting mixing three end‐members isotopic...
Olivine-hosted melt inclusions from both Fernandina and Santiago islands in the Galapagos Archipelago have compositions indicating that plagioclase played an important role magmatic evolution of these volcanic islands. The major trace element chemistry indicates simple assimilation. In contrast, for which appears to be present only as a 'ghost' signature (i.e. 'ghost plagioclase' signature). Two competing hypotheses been proposed explain this unique signature: (1) incorporation ancient...