Carbohydrate control of nitrogen dynamics in decomposing leaf litter of temperate tree species

冷温帯林において、9樹種の落葉分解にともなう窒素動態を18ヶ月にわたって調べ、窒素動態に及ぼす炭水化物の含有量の影響を評価した。窒素の変化パターンは、落葉の積算重量減少に対する窒素濃度の相対的な変化率（NCIR）として評価した。9樹種の落葉の残存重量は指数的に減少し、18ヶ月後には初期重量の2.4〜40.7％となった。指数関数に当てはめたときの傾き（オルソンのk）は、0.74〜2.45/年であった。窒素の残存量は分解にともなって概ね減少したが、落葉重量に対する窒素濃度は一般に、落葉の積算重量減少に対して直線的に増加した（すなわち、NCIRは正の値）。9樹種のNCIRと、落葉の初期炭水化物濃度とのあいだに有意な正の相関関係が認められた。このことは、炭水化物が、分解者菌類が落葉に窒素を保持するための主要なエネルギー源となっていることを示唆している。Nitrogen (N) dynamics in decomposing leaf litter were elucidated for nine tree species over an 18-month period in a cool temperate forest and the effect of carbohydrate content on the N dynamics was evaluated. The pattern of changes in N was quantified in terms of the relative change of N content with respect to the accumulated mass loss of litter (known as Nitrogen Content Increase Rate or NCIR). The remaining mass of leaf litter of the nine tree species declined exponentially during the decomposition, and 2.4% to 40.7% of the original mass remained at the end of the 18-month period. Decomposition rate (as Olson's k) ranged from 0.74 to 2.45 year^-1. The remaining mass of N in leaf litter generally decreased with the decomposition, whereas the relative N content of leaf litter generally increased linearly with the accumulated mass loss of litter (i.e., NCIR values were positive). The NCIR of leaf litter was significantly and positively correlated with initial total carbohydrate content of litter, suggesting that carbohydrates served as a major energy source for decomposer fungi to retain N in decomposing litter.抄録(英語)の＾-1は上付き文字application/pdfdepartmental bulletin pape

IC カード職員証・学生証の導入

2008-05departmental bulletin pape

Association between irregular daily routine and risk of incident stroke and coronary heart disease in a large Japanese population

Circadian misalignments have been linked to adverse cardiometabolic outcomes. However, the association between irregular daily routine and the risk of cardiovascular disease (CVD) remains unknown. We examined this association in a prospective study in Japan. The study included 78,115 Japanese participants aged 45–74 years. The self-reported daily routine was evaluated using the question, ‘Is your daily routine or activity schedule regular?’ The response (yes/no) was obtained as a binary variable. Cox proportional hazard regression analysis was used to estimate the hazard ratios and 95% confidence intervals for the association between an irregular daily routine and CVD incidence risk. Among the participants, 23.7% reported an irregular daily routine. During the mean follow-up period of 13.3 years, we observed 4641 CVD events. An irregular daily routine was significantly associated with increased risks of CVD and total stroke in women, but not in men. This positive association between an irregular daily routine and the risk of CVD was weak in the high vegetable and fruit consuming population. An irregular daily routine is positively associated with the risk of incident CVD, especially in women. These associations may be weak in populations that consume a diet rich in vegetables and fruits.journal articl

Improved Constraints on D0-D̅0 Mixing in D0→K+π- Decays from the Belle Detector

journal articl

α-イミノエステルに対するC―シリル化に続くアザ-Brook転位を活用した分子間求核付加反応

application/pdf三重大学大学院 工学研究科 博士前期課程 分子素材工学専攻109thesi

近畿圏の潜在自然植生

application/pdfMit Untersttitzung des Kultusministeriums von Japan haben wir seit 1971 pflanzensoziologische Untersuchungen mit vielen Vegetationsaufnahmen im Gelände durchgeführt und die heutige potentielle natüürliche Vegetation kartiert (vgl. Miyawaki u. Okuda 1975 : Karten der potentiellen natürlichen Vegetation von Shutoken 1:200 000 und Miyawaki, 01 und, Harada und Nakamura gleiche Karten von Chubuken 1:200 000). Hier wurde eine Gesamtdarstellung der heutigen potentiellen natürlichen Vegetation im Kinkiken inklusive der alten japanischen Hauptstädte Kyoto und Nara,der heute zweitegröfßten Bevölkerungsballung Japans (Osaka, Kobe), sowie der Kii-Halbinsel als Erläuterung zu der Karte der potentiellen natürlichen Vegetation der Camellietea japonicae-Region der genannten Gebiete gegeben.Contributions from the Department of Vegetation Science, Institute of Environmental Science and Technology, Yokohama Natlonal University No.56departmental bulletin pape

GenoBase: comprehensive resource database of Escherichia coli K-12

Comprehensive experimental resources, such as ORFeome clone libraries and deletion mutant collections, are fundamental tools for elucidation of gene function. Data sets by omics analysis using these resources provide key information for functional analysis, modeling and simulation both in individual and systematic approaches. With the long-term goal of complete understanding of a cell, we have over the past decade created a variety of clone and mutant sets for functional genomics studies of Escherichia coli K-12. We have made these experimental resources freely available to the academic community worldwide. Accordingly, these resources have now been used in numerous investigations of a multitude of cell processes. Quality control is extremely important for evaluating results generated by these resources. Because the annotation has been changed since 2005, which we originally used for the construction, we have updated these genomic resources accordingly. Here, we describe GenoBase (http://ecoli.naist.jp/GB/), which contains key information about comprehensive experimental resources of E. coli K-12, their quality control and several omics data sets generated using these resources.journal articl

日本のマスコミ研究 : 回顧と展望(創立20周年記念シンポジウム)

rights: 日本マス・コミュニケーション学会 rights: 本文データは学協会の許諾に基づきCiNiiから複製したものである relation: IsVersionOf: http://ci.nii.ac.jp/naid/110002772432/textapplication/pdfjournal articl