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Effects of leaf age,elevation and light conditions on photosynthesis and leaf traits in saplings of two evergreen conifers,Abies veitchii and ***

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Journal of Plant Ecology 2020年第4期13卷 460-469页

作者： Rina Suzuki koichi takahashi Department of Science Graduate School of Science and TechnologyShinshu UniversityAsahi 3-1-1Matsumoto 390-8621Japan Department of Biology Faculty of ScienceShinshu UniversityMatsumoto 390-8621Japan Department of Mountain Ecosystem Institute for Mountain ScienceShinshu UniversityAsahi 3-1-1Matsumoto 390-8621Japan

Aims Subalpine coniferous species are distributed over a wide range of elevations in which they must contend with stressful conditions,such as high elevations and extended periods of *** evergreen coniferous species,Abies veitchii and Abies mariesii,dominate at low and high elevations,respectively,in the subalpine zone,central *** aim of this study is to examine the effects of leaf age,elevation and light conditions on photosynthetic rates through changes in morphological and physiological leaf traits in the two *** We here examined effects of leaf age,elevation and light conditions on photosynthesis,and leaf traits in *** and *** of the two conifers were sampled in the understory and canopy gaps at their lower(1600 m)and upper(2300 m)distribution *** Findings The two species showed similar responses to leaf age and different responses to elevation and light conditions in photosynthesis and leaf *** maximum photosynthetic rate of *** is correlated negatively with leaf mass per area(LMA)and non-structural carbohydrate(NSC)*** increased at high elevations in the two species,whereas NSC concentrations increased only in ***,the maximum photosynthetic rate of *** decreased at high ***,maximum photosynthetic rates correlate positively with nitrogen concentration in both *** the understory,leaf nitrogen concentrations decreased and increased in *** and ***,*** decreased and the chlorophyll-to-nitrogen ratio increased in understory conditions only for ***,suggesting it has a higher light-capture efficiency in dark conditions than does *** study concluded that *** has more shade-tolerant photosynthetic and leaf traits and its photosynthetic rate is less affected by elevation compared with ***,allowing *** to survive in the understory and to dominate at high elevations.

关键词： leaf chlorophyll leaf mass per area leaf nitrogen non-structural carbohydrate concentration stable carbon–isotope ratio

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Regeneration Traits of Four Dominant Species in a Cool-Temperate Conifer-Hardwood Mixed Forest, Northern Japan

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American Journal of Plant Sciences 2017年第13期8卷 3313-3323页

作者： koichi takahashi Department of Biology Faculty of Science Shinshu University Matsumoto Japan Institute of Mountain Science Shinshu University Matsumoto Japan

Regeneration traits of four dominant species were studied during a decade in a cool-temperate conifer-hardwood mixed forest, northern Japan. Dominant species were three canopy species (Tilia japonica, Acer mono and Abies sachalinensis) and a subcanopy species Prunus ssiori. Regeneration traits differed among the four dominant species. The regeneration of a conifer Abies sachalinensis largely depends on major disturbances because its size structure was a bell-shaped pattern. The growth rate of the sub-canopy species Prunus ssiori increased faster with tree size than the other three species, and therefore, this species can reach reproductive stage faster. Although the number of recruits of Tilia japonica was less than the other three dominant species, about one-fourth of Tilia japonica regenerated by the sprouts. Thus, vegetative reproduction is important for the regeneration of Tilia japonica. On the contrary, many recruits were observed in Acer mono, and its recruits and saplings concentrated in canopy gaps, suggesting that the regeneration of Acer mono restricted to canopy gaps. Thus, clear differences in the regeneration traits were recognized in the four dominant species. This study suggests that the species-specific regeneration traits contribute to the species coexistence of the four dominant species through different regeneration niches.

关键词： Canopy Gaps Competition Disturbances Growth Sprouts

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How <i>Betula ermanii</i>Maintains a Positive Carbon Balance at the Individual Leaf Level at High Elevations

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American Journal of Plant Sciences 2017年第3期8卷 482-494页

作者： koichi takahashi Sohei Otsubo Department of Biology Faculty of Science Shinshu University Matsumoto Japan Institute of Mountain Science Shinshu University Matsumoto Japan

Generally, plant species with shorter leaf longevity maintain a positive carbon balance by decreasing leaf mass per area (LMA) and increasing photosynthesis. However, plants at high elevations need to increase LMA against environmental stresses. Therefore, plants need to increase both LMA and photosynthesis at high elevations. To examine how deciduous plants maintain a positive carbon balance at high elevations, photosynthesis and related leaf traits for deciduous broad-leaved tree Betula ermanii were measured at three elevations. LMA was greater at middle and high elevations than at low elevation. Leaf δ13C was greater at higher elevations, and positively correlated with LMA, indicating greater long-term deficiency of CO2 in leaves at higher elevations. However, the Ci/Ca ratio at photosynthetic measurement was not low at high elevations. Nitrogen content per leaf mass and stomatal conductance were greater at higher elevations. Photosynthetic rates and photosynthetic nitrogen use efficiency (PNUE) did not differ among the three elevations. Photosynthetic rate showed a strong positive correlation with stomatal conductance on a leaf area basis (R2 = 0.83, P < 0.001). Therefore, this study suggests B. ermanii compensates the deficiency of CO2 in leaves at high elevation by increasing stomatal conductance, and maintains photosynthesis and PNUE at high elevation as much as at low elevation.

关键词： Leaf Mass per Area Leaf Nitrogen Photosynthesis Stable Carbon Isotope Ratio Stomatal Conductance

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Influence of pulsed electric field on enzymes, bacteria and volatile flavor compounds of unpasteurized sake

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Plasma Science and Technology 2018年第4期20卷 51-56页

作者： Takamasa OKUMURA Taro YAEGASHI Takahiro FUJIWARA Katsuyuki takahashi koichi TAKAKI Tomo KUDO Institute of Fluid Science Tohoku University Department of Systems Innovation Engineering Iwate University Washinoo Co. Ltd

A pulsed electric field(PEF) was applied to unpasteurized sake at constant temperatures, at which α-amylase was not inactivated. We adjusted the input energy to be identical for the temperatures by changing the number of PEF application, because the current significantly increased with the temperature, even the amplitude of the applied voltage was identical. As a result, the α-amylase was seemed to be inactivated by PEF application, not due to thermal *** glucoamylase was significantly inactivated by PEF. Moreover, the acid carboxypeptidase was inactivated by PEF at 4 °C but significantly activated at 25 °C. These results show that the sensitivity of enzyme to PEF application differs depending on the types of enzyme and treatment temperature. On the other hand, the colony number of bacteria was remarkably decreased, but the amount of the volatile flavor compounds was not decreased by PEF application.

关键词： pulsed electric field enzyme activity bacteria inactivation vulnerable molecules unpasteurized sake electroporation

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日本水泥质量标准现状（英文）

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硅酸盐学报 2015年第10期43卷 1467-1474页

作者： Hisanobu TANAKA Hideki KONDOU Shigeru takahashi koichi KOBAYASHI Technical Management Committee of Japan Cement Association MITSUBISHI MATERIALS CORPORATION R & D Laboratory Japan Cement Association Basic Research on Cement/Environment Group Japan Cement Association Cement Quality Assurance Group Japan Cement Association

介绍了当前日本水泥质量标准的基本情况。分析了目前日本水泥的供求和分配状况。介绍了日本水泥的质量标准大纲、日本的水泥检测方法和国际标准之间的关系和异同、混凝土耐久性的与水泥质量标准之间的关系,以及日本水泥相关的法律和法... 详细信息

介绍了当前日本水泥质量标准的基本情况。分析了目前日本水泥的供求和分配状况。介绍了日本水泥的质量标准大纲、日本的水泥检测方法和国际标准之间的关系和异同、混凝土耐久性的与水泥质量标准之间的关系,以及日本水泥相关的法律和法规的情况。比较了欧洲与日本的水泥质量标准。

关键词：水泥质量标准日本工业标准欧洲标准

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Progress of ulcerative colitis patients during the COVID-19 pandemic

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World Journal of Clinical Cases 2023年第23期11卷 5462-5467页

作者： Toshikuni Suda Morio takahashi Yasumi Katayama koichi Soga Ikuhiro Kobori Yumi Kusano Masaya Tamano Division of Gastroenterology Dokkyo Medical University Saitama Medical CenterSaitama 343-8555Japan Division of Gastroenterology Morio ClinicSaitama 343-0808Japan

BACKGROUND We have previously demonstrated that the first wave of the coronavirus disease 2019(COVID-19)pandemic caused exacerbations in ulcerative colitis(UC)patients,probably through psychological and physical ***,successive waves of the COVID-19 pandemic continuously followed the *** effects of this chronic stress on the disease condition in UC patients are of *** To clarify the effect of chronic stress from COVID-19 on disease condition in patients aggravated after the first *** Our previous study investigated 289 consecutive UC outpatients treated in one center during March and April 2020,the period of the first wave of the COVID-19 *** this study,an identical group of 289 UC patients was evaluated using UC-disease activity index(UC-DAI),endoscopic mucosal appearance score,and Matts pathological grade *** Of the 289 UC patients included in the study in 2020,10 patients dropped out as of 2021 and another 11 patients dropped out as of 2022,making three groups for 2020,2021 and *** significant differences in characteristics were found among the three ***-DAI scores had aggravated during the period of the first wave of the COVID-19 pandemic,but significantly recovered in 2021 and remained stable in *** grade scores significantly recovered in 2021 from those in 2020 and remained stable in *** Disease activity of UC patients recovered in 2021 and remained stable in 2022,aggravated by the stress of the first wave of COVID-19 in 2020 despite persistence of the pandemic.

关键词： Ulcerative colitis COVID-19 Exacerbation Stress Ulcerative colitis disease activity index Matts grade

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Nature：研究鉴定出侵袭性胰腺癌细胞及其弱点

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现代生物医学进展 2017年第14期17卷 I0002-I0003页

作者： Genovese, Giannicola Carugo, Alessandro Tepper, James Robinson, Frederick Scott Li, Liren Svelto, Maria Nezi, Luigi Corti, Denise Minelli, Rosalba Pettazzoni, Piergiorgio Gutschner, Tony Wu, Chia-Chin Seth, Sahil Akdemir, Kadir Caner Leo, Elisabetta Amin, Samirkumar Dal Molin, Marco Ying, Haoqiang Kwong, Lawrence N. Colla, Simona takahashi, koichi Ghosh, Papia Giuliani, Virginia Muller, Florian Dey, Prasenjit Jiang, Shan Garvey, Jill Liu, Chang-Gong Zhang, Jianhua Heffernan, Timothy P. Toniatti, Carlo Fleming, Jason B. Goggins, Michael G. Wood, Laura D. Sgambato, Alessandro Agaimy, Abbas Maitra, Anirban Roberts, Charles W. M. Wang, Huamin Viale, Andrea DePinho, Ronald A. Draetta, Giulio F. Chin, Lynda Univ Texas MD Anderson Canc Ctr Dept Genom Med Houston TX 77030 USA Univ Texas MD Anderson Canc Ctr Inst Appl Canc Sci Houston TX 77030 USA European Inst Oncol I-20141 Milan Italy Sun Yat Sen Univ Ctr Canc State Key Lab Oncol South China Guangzhou 510060 Guangdong Peoples R China Univ Cattolica Sacro Cuore Ist Patol Gen I-00168 Rome Italy Baylor Coll Med Grad Program Struct & Computat Biol & Mol Biophys Houston TX 77030 USA Johns Hopkins Univ Sol Goldman Pancreat Canc Res Ctr Dept Pathol Baltimore MD 21287 USA Univ Texas MD Anderson Canc Ctr Dept Mol & Cellular Oncol Houston TX 77030 USA Univ Texas MD Anderson Canc Ctr Dept Translat Mol Pathol Houston TX 77030 USA Univ Texas MD Anderson Canc Ctr Dept Leukemia Houston TX 77030 USA Univ Texas MD Anderson Canc Ctr Off Technol Commercializat Houston TX 77030 USA Univ Texas MD Anderson Canc Ctr Dept Canc Syst Imaging Houston TX 77030 USA Univ Texas MD Anderson Canc Ctr Dept Canc Biol Houston TX 77030 USA Univ Texas MD Anderson Canc Ctr Dept Expt Therapeut Houston TX 77030 USA Univ Texas MD Anderson Canc Ctr ORBIT Platform Houston TX 77030 USA Univ Texas MD Anderson Canc Ctr Dept Surg Oncol Houston TX 77030 USA Friedrich Alexander Univ Erlangen Nuremberg Univ Hosp Dept Pathol D-91054 Erlangen Germany Friedrich Alexander Univ Erlangen Nuremberg Dept Pathol D-91054 Erlangen Germany Friedrich Alexander Univ Erlangen Nuremberg Sheikh Ahmed Bin Zayed Nahyan Ctr Pancreat Canc R D-91054 Erlangen Germany St Jude Childrens Res Hosp Ctr Comprehens Canc Memphis TN 77027 USA St Jude Childrens Res Hosp Dept Oncol Memphis TN 77027 USA C4 Therapeut Cambridge MA 02142 USA Univ Texas Syst Inst Hlth Transformat Austin TX 78701 USA

在一项新的研究中，来自美国德州大学MD安德森癌症中心的研究人员利用患者源性肿瘤异种移植（patient—derived tumorxenograft,PDx）和模式小鼠开展一系列临床前实验，鉴定出一种门卫蛋白（gatekee Perprotein）阻止胰腺癌细胞转化为... 详细信息

在一项新的研究中，来自美国德州大学MD安德森癌症中心的研究人员利用患者源性肿瘤异种移植（patient—derived tumorxenograft,PDx）和模式小鼠开展一系列临床前实验，鉴定出一种门卫蛋白（gatekee Perprotein）阻止胰腺癌细胞转化为一种极具侵袭性的细胞类型，并且也发现剔除这种门卫蛋白的疗法能够阻止这些癌细胞。这些发现有助为携带这种进展迅速的治疗抵抗性的胰腺癌细胞亚群的患者开发出潜在的疗法。

关键词：胰腺癌癌细胞侵袭性鉴定异种移植研究人员细胞类型细胞转化

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Potassium Phosphate Recovery from Incinerated Ash of Sewage Sludge

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材料科学与工程（中英文B版） 2017年第4期7卷 149-154页

作者： Masaaki takahashi Yukimasa Takemoto Eiji Yuki koichi Seno Faculty of Environmental and Information Science Yokkaichi University Yokkaichi 512-8512 Japan Mie Chuo Kaihatsu Co. Ltd Hachiya 4713 Iga Mie 518-1152 Japan

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Antioxidative action of N-a-tosyl-L-lysine chloromethyl ketone prevents death of glutathione-depleted cardiomyocytes induced by hydrogen peroxide

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Journal of Biophysical Chemistry 2010年第3期1卷 164-171页

作者： Kiyoshi takahashi Kyohei Oyama Hironori Motoshige koichi Sakurai 不详

Hydrogen peroxide (H2O2) induces the hypertrophy in cultured H9c2 cardiomyocytes and cell death in glutathione (GSH)-depleted H9c2 cells. In the present study, we observed that pretreatment with a serine protease inhibitor, N-a-tosyl-L-lysine chloromethyl ketone (TLCK), significantly prevented the H2O2-induced cell damages in GSH-depleted H9c2 cells in a concentration-dependent manner. The phase contrast microscopy revealed that although the exposure of the GSH-depleted H9c2 cells to H2O2 resulted in a globular shape of the cells, TLCK prevented the occurrence of H2O2-induced morphological changes. TLCK also inhibited the generation of reactive oxygen species in the cells after addition of H2O2, suggesting that the antioxidant action of TLCK is involved in the protection against the cell damages by H2O2. Application of TLCK after ~30 min of exposure to H2O2 could significantly protect the cells from cell damages. The other serine protease inhibitors that were tested could not prevent the cell damages in GSH- depleted H9c2 cells. Pretreatment with an inhibitor of nuclear factor-kB translocation into the nucleus and a proteasome inhibitor did not prevent the cell damages in GSH-depleted H9c2 cells. An inhibitor of p53 significantly prevented the cell damages in GSH-depleted H9c2 cells. These results suggest that antioxidative action of TLCK prevents the death of GSH-depleted H9c2 cardiomyocytes induced by H2O2.

关键词： TLCK Cardiomyocytes Oxidative Damage H2O2 p53 ROS Antioxidant

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Phosphorus Recovery from Charcoal of Sewage Sludge by Incineration Treatment

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材料科学与工程（中英文A版） 2018年第2期8卷 59-64页

作者： Masaaki takahashi Yukimasa Takemoto Eiji Yuuki koichi Seno Yokkaichi University Research Laboratory on Environmental Technology Kayo-cho 1200 Yokkaichi Mie 512- 8512 Japan Mie Chuo Kaihatsu Co. Ltd Hachiya4713 Yono Iga Mie 518-1152 Japan

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