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How does the 120-year cycle mast seeding of dwarf bamboo affect the rodent population?

Ecological Processes 2022年第1期11卷 577-586页

作者： Hanami Suzuki Haruka Kashiwagi hisashi kajimura Laboratory of Forest Protection Graduate School of Bioagricultural SciencesNagoya UniversityFurochoChikusakuNagoya 468-8601Japan Nagoya City Science Museum NakakuNagoya 460-0008Japan

Background:In 2017,large-scale flowering,seeding,and dying events of dwarf bamboo(Sasa borealis)occurred in a wide range in central Japan for the first time in 120 *** phenomenon of ***,like the mast seeding of trees,could be expected to provide a large amount of food for seed-eating rodents and gradually affect their ecology and population *** captured rodents in survey plots in a secondary broad-leaved forest with the phenomenon from 2018 to 2019 to investigate the species,the number of individuals,growing stage,sex,and body *** addition,we also compared the capture data for 2 years(2018–2019)with that for the mast seeding year(2017)and 6 years before it(2011–2016).Results:The mast seeding of *** greatly increased the population size of rodents,especially Apodemus speciosus and ***,Eothenomys smithii did not show such an *** of the captured rodent individuals were already adults at the time of new capture,and the proportion of male juveniles was extremely *** results suggest that the mast seeding of *** created unusually rich food availability for the population concentration of rodents due to their ***,body mass was not significantly different before and after the mast *** addition,the increased populations of the two Apodemus species did not decline 2 years after the *** masting,contrary to the previously reported decrease of rodent populations after tree ***:Our results indicate that the mast seeding of *** affected the population dynamics of Apodemus species over a long time and their individual composition of different growth ***,it did not affect their body mass.

关键词： Apodemus speciosus Apodemus argenteus Eothenomys smithii Mast seeding Population dynamics Predator satiation hypothesis Sasa borealis

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用扫描电子显微镜感生的β-电导率来观察耿二极管的杂质分布

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微纳电子技术 1974年第7期 35-43页

作者： Takashi kajimura Michiharu Nakamura 朱毓铭

利用由电子束感生的电导率(β-电导率)所得到的信号观察了沿耿二极管中电流方向上净施主杂质浓度的一维分布。已被证明,所产生的电压信号是能够清楚地显示出耿二极管有源层中各种形式的掺杂分布。考察了电压信号的特性与二极管特性之间... 详细信息

利用由电子束感生的电导率(β-电导率)所得到的信号观察了沿耿二极管中电流方向上净施主杂质浓度的一维分布。已被证明,所产生的电压信号是能够清楚地显示出耿二极管有源层中各种形式的掺杂分布。考察了电压信号的特性与二极管特性之间的关系,并确认了二极管的退化是由不对称的杂质分布所引起。

关键词：电子束照射有源层二极管掺杂分布电导率电性扩散长度扫描电子显微镜杂质分布感生

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Carbon monoxide: impact on remethylation/transsulfuration metabolism and its pathophysiologic implications

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世界最新医学信息文摘 2015年第5期 245-245页

作者： Takako Hishiki Takehiro Yamamoto Takayuki Morikawa Akiko Kubo Mayumi kajimura Makoto Suematsu

Carbon monoxide(CO) is a gaseous product generated by heme oxygenase(HO), which oxidatively degrades heme. While the stress-inducible HO-1 has well been recognized as an anti-oxidative defense mechanism under stress conditions, recent studies suggest that cancer cells utilize the reaction for their survival. HO-2, the constitutive isozyme, also plays protective roles as a tonic regulator for neurovascular function. Although protective roles of the enzyme reaction and CO have extensively been studied, little information is available on the molecular mechanisms by which the gas exerts its biological actions. Recent studies using metabolomics revealed that CO inhibits cystathionine β-synthase(CBS), which generates H2 S, another gaseous mediator. The CO-dependent CBS inhibition may impact on the remethylation cycle and related metabolic pathways including the methionine salvage pathway and polyamine synthesis. This review focuses on the gas-responsive regulation of metabolic systems, particularly the remethylation and transsulfuration pathways, and their putative implications for cancer and ischemic diseases.

关键词： Heme oxygenase Hydrogen sulfide Cystathionine β-synthase Methylation Glutathione Cancer Methionine salvage pathway Epigenetics Metabolic systems Gas biology

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