A5047235352- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Geological formations and processes
- Isotope Analysis in Ecology
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Lichen and fungal ecology
- Ecology and Conservation Studies
- Paleontology and Stratigraphy of Fossils
- Conducting polymers and applications
- Perovskite Materials and Applications
- Peatlands and Wetlands Ecology
- Pacific and Southeast Asian Studies
- Ancient and Medieval Archaeology Studies
- Plant Ecology and Soil Science
- Marine and coastal ecosystems
- Organic Electronics and Photovoltaics
- Aeolian processes and effects
- Heart Rate Variability and Autonomic Control
- Diatoms and Algae Research
- Ecology and Vegetation Dynamics Studies
- Transgenic Plants and Applications
Lake Biwa Museum
2013-2024
Keio University
2016-2023
University of Tsukuba
2022
Aichi Institute of Technology
2019-2020
Universidad de Murcia
2017
University of Hyogo
2017
Kyoto Prefectural University
2009-2012
Abstract. Quaternary records provide an opportunity to examine the nature of vegetation and fire responses rapid past climate changes comparable in velocity magnitude those expected 21st-century. The best documented examples change are warming events associated with Dansgaard–Oeschger (D–O) cycles during last glacial period, which were sufficiently large have had a potential feedback through albedo greenhouse gas emissions on climate. Previous reconstructions D–O used independently...
Abstract A high-resolution pollen record covering the last 40,000 yr (BIW95-4) from Lake Biwa, western Japan, shows regional vegetation responses to millennial-scale climate changes. From 40 30 ka, Cryptomeria japonica was dominant around lake among pinaceous conifers and deciduous broad-leaved trees. During this period, fluctuations of C. are correlated with Dansgaard–Oeschger (D–O) cycles recognized anhysteretic remanent magnetization (ARM) record. Increases in abundance taxon may have...
The reconstruction of fire history is essential to understand the palaeoclimate and human history. Polycyclic aromatic hydrocarbons (PAHs) have been extensively used as a marker. In this work, distribution PAHs in Borneo peat archives was investigated how reflect palaeo-fire activity. total, 52 samples were analysed from core for PAH analysis. Pyrogenic consist 2–7 rings, some which methyl ethyl groups. results reveal that concentration pyrogenic fluctuated with depth. Compared...
Abstract The forcing of multicentennial climate variability in the Western Pacific Warm Pool (WPWP) region is not fully understood. Here, we generated 6‐kyr‐long continuous charcoal records from five peatlands Borneo. Every several hundred years, peaks influx were identified composite record, indicating that repeatedly experienced dry conditions and wildfires. Major fire events at ∼5.4, 4.7, 4.4, 3.7, 3.2, 2.7, 2.4, 2.2, 1.7, 1.1, 0.6, 0.3 ka. Most these coincided with maxima Borneo...
Abstract The natural distribution of Japanese cedar ( Cryptomeria japonica ) has been disturbed by human activities, owing mainly to its value as timber; thus, position in the vegetation zone Japan is not clear. Therefore, it important determine history C. forests before influence. We reviewed transitions and abundance Archipelago since last interglacial period using published pollen data. During interglacial, temperate deciduous broadleaf developed on northeastern Honshu Island, whereas...
Abstract. Quaternary records provide an opportunity to examine the nature of vegetation and fire responses rapid past climate changes comparable in velocity magnitude those expected 21st century. The best documented examples change are warming events associated with Dansgaard-Oeschger (D-O) cycles during last glacial period, which were sufficiently large have had a potential feedback through albedo greenhouse gas emissions on climate. Previous reconstructions D-O used independently...
<b><i>Background:</i></b> Gastrointestinal endoscopy and <i>Helicobacter pylori</i><i>(H. pylori)</i> eradication therapy are commonly performed even among the elderly population. The aim of this study was to understand way endoscopists viewed application <i>H. pylori</i> in East Asian countries. <b><i>Methods:</i></b> Self-administered questionnaires containing 13 questions on were distributed major...
ABSTRACT We examined long‐term charcoal records spanning the glacial–interglacial cycles that are evident in two cores collected from Lake Biwa central Japan. found of have a similar variation pattern concentrations and abundant large fragments postglacial sediments, which indicates frequent fires occurred near shores during period. Analogous natural conditions early period part last interglacial strongly suggest only were anthropogenic. A comparison between sediments cultural changes human...
Concanavalin A (ConA), a mannose (Man)-specific leguminous lectin isolated from the jack bean (Canavalia ensiformis) seed extracts, was discovered over century ago. Although ConA has been extensively applied in various life science research, recombinant mature expression not fully established. Here, we aimed to produce (rConA) lettuce (Lactuca sativa) using an Agrobacterium tumefaciens-mediated transient system. rConA could be produced as active form soluble fractions of leaves and purified...
日本の森林は江戸時代前期には大きく衰退しており,秋田の天然スギも同じような状況にあったことが指摘されている。こうした秋田スギの衰退過程を明らかにするために,秋田県北部森吉山の上谷地湿原で採取した堆積物試料の花粉分析を行い,湿原周辺地域の植生史を復元した。この地域では,堆積物最下部の堆積当時から現在まで一貫して,ブナやナラ類を主とする落葉広葉樹が優勢だった。これに対してスギは,AD900年代はじめまでブナやナラ類とともに優勢だったが,AD900年代半ばからAD1200年代には変動しながらやや減少し,AD1300年代以降になって明らかに減少した。この変化は人為的な影響によると考えられ,AD1500年代半ばからAD1800年代半ばにはスギが衰退した状態で推移した。その後,戦後になって,植林が広がった影響でスギは再び増加した。秋田スギの優勢な時代から衰退する過程は,本研究を含む秋田県内の三つの花粉分析地点で少しずつ異なっていたが,その原因は人里からの距離などのスギ林の立地の違いが影響していると推察した。
Interictal paroxysmal rhythmic activity can appear in electroencephalography (EEG) patients with mental disorders. The abnormal EEG were analyzed by wavelet-crosscorrelation analysis. categorized as following: 2-4 seconds (A) and 0-2 (B) before the appearance of EEG; 2 during (C); (D) (E) after EEG. Wavelet-crosscorrelation coefficients (WCC) theta alpha bands for each segment calculated all patients. results band showed that connections between sites brain could continue although seemingly...