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The Cytological Studies on neglected and Underutilized Cucurbit Species with Special Reference to Chayote,an Under-Exploited Species

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American Journal of Plant Sciences 2019年第8期10卷 1261-1279页

作者： Sergio G.Olvera-Vazquez Jorge Cadena-Iniguez Syed A.Gilani Kazuo n.watanabe Tsukuba Plant Innovation Research Center University of TsukubaTsukubaJapan Colegio de Postgraduados Campus San Luis PotosiSalinas de HidalgoMexico Department of Biological Sciences and Chemestry University of NizwaNizwaSultanate of Oman

Cucurbitaceae family contains important economic and medical crops, they can be divided into two categories according to the worldwide consumption, use, and production. The Cucurbit Popular Crops (CuPoC) are comprised of cucumber, the Cucurbita group (pumpkin and squash), melon and watermelon. On the other hand, neglected and Underutilized Cucurbit Species (nUCuS) group has been used as food sources, medicinal properties and elements in the elaboration of different types of items. The nUCuS is represented in this review work by bitter gourd, bottle gourd, chayote, ridge gourd, and snake gourd, which are recognized mainly in Asia. The center of origin of the majority of nUCuS was proposed to be in the Old World. In contrast, the origin of chayote or Sechiumedule (Jacq.) Sw. was suggested in the new World, precisely in Mesoamerican region based on linguistic uses and distribution of wild relatives. The environmental factors along with artificial selection, production systems and traditional knowledge have been influenced the evolutionary history of nUCuS, Infraspecific variation of chayote has been reported in Mexico over-described varietal groups. These descriptors were determined based on biochemical and morpho-structural traits;however, cytogenetic analyses are scarce. Specifically, chromosome and nuclear content analyses are important to support botanical groups, analyze artificial selection history, developing breeding and conservation programs. The present review paper discusses agronomic and evolutionary importance based on cytological evidence in nUCuS, mainly in the prominent chayote;with the perspective to prompt breeding, conservation, cytology, structural and functional genomics research for its sustainable utilization.

关键词： Chayote Sechiumedule nUS nuclear Content Chromosome number Cucurbit Species

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动力转向胶管用的HSn胶料

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橡胶参考资料 1990年第5期20卷 48-57页

作者： n.watanabe 朱轩振

1 引言小型大功率汽车和施工设备的出现,以及由此引起更高的工作和液体温度,已经需要改善动力转向胶管的性能。为保持运转畅通而赋予更长的使用期限和更高的效率,故在液压油中加入许多添加剂,这些添加剂伴随着长期作业中生成的氧化油对... 详细信息

1 引言小型大功率汽车和施工设备的出现,以及由此引起更高的工作和液体温度,已经需要改善动力转向胶管的性能。为保持运转畅通而赋予更长的使用期限和更高的效率,故在液压油中加入许多添加剂,这些添加剂伴随着长期作业中生成的氧化油对用作动力转向胶管的传统弹性体将产生一系列的破坏作用。

关键词：胶管 HSn 胶料动力转向胶管

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WEISSEnBERG CAMERA FOR MACROMOLECULES WITH IMAGInG PLATE DATA COLLECTIOn SYSTEM AT PFIPRESEnT STATUS AnD FUTURE PLAn

WEISSENBERG CAMERA FOR MACROMOLECULES WITH IMAGING PLATE DAT...

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Sixteenth Congress of the International Union of Crystallography

作者： n.SAKABE K.SAKABE T.HIGASHI A.nAKAGAWA n.watanabe S.ADACHI Dept.of Chemistry Faculty of ScienceNagoya Univ.Chikusa Nagoya 464Japan Rigaku Corporation MatsubaraAkishimaTokyo 196Japan Photon Factory National Laboratory for High Energy PhysicsTsukuba 305Japan The Institute of Physical and Chemical Research (RIKEn) Hirosawa 2-1WakoSaitama351-01 Japan

＜正＞The Photon Factory is operating at 2.5Gev and *** are two data collection systems for macromolecular crystallography at BL6A2 and BL18B,consisting of Weissenberg camera,imaging plate,image reader（BA100 ＆ BAS2...

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Isolation and Characterization of novel Microsatellite Markers in Chayote[Sechium edule(Jacq.)Sw.]

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American Journal of Plant Sciences 2015年第13期6卷 2033-2041页

作者： Ryoko Machida-Hirano Moisés Cortés-Cruz Blanca Amalia Amaro González Jorge Cadenaí Iiguez Kazuto Shirata Kazuo n.watanabe Gene Research Center University of TsukubaTsukubaJapan Centro nacional de Recursos Genéticos Instituto Nacional de Investigaciones ForestalesAgrícolas y PecuariasTepatitlán de MorelosMéxico Colegio de Postgraduados Campus San Luis PotosíSalinas de HidalgoMexico national Institute of Agrobiological Sciences TsukubaJapan

Chayote [Sechium edule (Jacq.) Sw.] is an economically important species in Latin America;however, there are very few reports available regarding its genetic diversity. Out of 11 microsatellite markers isolated, 10 loci provided 1 to 7 alleles per locus in a set of Mexican chayote accessions. Observed and expected heterozygosities for each locus ranged from 0.00 to 0.85 and 0.00 to 0.73, respectively. The overall genetic diversity detected by microsatellites was compared with that detected by P450-based analogue markers, a genome-wide dominant marker. Genetic diversity values obtained by the newly designed microsatellite markers were almost equal to the value estimated by PBA markers, but genetic distances calculated by both marker systems were not significantly correlated. Additional microsatellite markers, which could detect more polymorphisms, may be necessary to analyze the genetic diversity and structure of Mexican chayote collections.

关键词： Chayote SSR Markers PBA Markers Dual-Suppression-PCR Technique Genetic Diversity

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衍生于稻穗麦的四倍体小麦长颖表型的遗传控制

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国外作物育种 2003年第5期22卷 11-12页

作者： n.watanabe I．Imamura 谢国禄

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乌龙茶的醇类香味形成机理

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香料香精化妆品 1996年第4期 30-47页

作者： K.Sakata n.watanabe T.Usui W.GuO JH.Moon S.Luo 朱立弘静冈大学农业系歧阜大学(静冈大学)农业科学联合研究院对外贸易部杭州茶叶研究所

在我们对乌龙茶（水仙与毛蟹──是茶树的两种名品种）的香味形成机理作研究的过程中，我们分离并鉴定出了香叶醇、芳樟醇、2-苯乙醇、苄醇、芳樟醇氧化物Ⅰ与Ⅱ（反式-与顺式-芳樟醇3，6-氧化物）的主要醇类香味前驱体（1-7），并与β... 详细信息

在我们对乌龙茶（水仙与毛蟹──是茶树的两种名品种）的香味形成机理作研究的过程中，我们分离并鉴定出了香叶醇、芳樟醇、2-苯乙醇、苄醇、芳樟醇氧化物Ⅰ与Ⅱ（反式-与顺式-芳樟醇3，6-氧化物）的主要醇类香味前驱体（1-7），并与β-樱草糖苷一样的水杨酸甲酯（6-O-β-D-吡喃木糖基-β-D-吡喃糖苷），以酶法水解（用Yabukita栽培种制得的丙酮粉末）得出，随后采用气相色谱与气相色谱-质谱联用分析法。芳樟醇氧化物Ⅳ（顺式-芳樟醇3，7-氧化物）与（Z）-3-己烯醇的香味前驱体（8与9）罕见地分别以6-O-β-D-芹菜呋喃糖基-β-D-吡喃葡糖与β-D-吡喃葡糖的形式被分离出。作为一个初始实验，我们亦认日本绿茶生产用的Yabukita栽培种的新鲜茶叶作提纯并对其特性描述为一种新的糖苷酶（β-樱草糖苷）。这一糖苷酶经证实为与茶叶中醇类香味形成有关系的主要糖苷酶之一。这是迄今为止提纯出的第二个β-樱草糖苷的标样。从新鲜乌龙茶叶（水仙栽培种）中作的糖苷酶的提纯亦完成了一项发现，即樱草糖苷的活性很近似于Yabukita栽培种。

关键词：茶叶乌龙茶醇类香味

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Aging-induced memory loss due to decreased n1-acetyl-5-methoxykynuramine,a melatonin metabolite,in the hippocampus:a potential prophylactic agent for dementia

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neural Regeneration Research 2025年第6期20卷 1705-1706页

作者： Kazuki watanabe Atsuhiko Hattori Department of Immunobiology Institute of Development Aging and CancerTohoku UniversitySendaiMiyagiJapan Department of Sport and Wellness College of Sport and WellnessRikkyo UniversityNiizaSaitamaJapan

Melatonin(n-acetyl-5-methoxytryptamine)is known as the hormone of darkness because it is synthesized at night and involved in regulating the circadian *** hormone is primarily synthesized by the vertebrate pineal gland,but is ubiquitous among invertebrates,unicellular organisms,plants,and even cyanobacteria(Hattori and Suzuki,2024).Melatonin is well-conserved evolutionarily and possesses several physiological functions,such as immune response,bone and glucose metabolism,and memory formation besides regulating the circadian rhythm.

关键词： metabolism primarily agent

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Impact of device resistances in the performance of graphene‑based terahertz photodetectors

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Frontiers of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Castelló Sofía M.López Baptista K.watanabe T.Taniguchi E.Diez J.E.Velázquez-Pérez Y.M.Meziani J.M.Caridad J.A.Delgado-notario Department of Applied Physics University of Salamanca37008 SalamancaSpain Unidad de Excelencia en Luz y Materia Estructurada(LUMES) University of Salamanca37008 SalamancaSpain Research Center for Electronic and Optical Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Research Center for Materials nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan nanotechnology Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent years,graphene field-effect-transistors(GFETs)have demonstrated an outstanding potential for terahertz(THz)photodetection due to their fast response and *** features are essential to enable emerging THz applications,including 6G wireless communications,quantum information,bioimaging and ***,the overall performance of these photodetectors may be utterly compromised by the impact of internal resistances presented in the device,so-called access or parasitic *** this work,we provide a detailed study of the influence of internal device resistances in the photoresponse of high-mobility dual-gate GFET *** dual-gate architectures allow us to fine tune(decrease)the internal resistance of the device by an order of magnitude and consequently demonstrate an improved responsivity and noise-equivalent-power values of the photodetector,*** results can be well understood by a series resistance model,as shown by the excellent agreement found between the experimental data and theoretical *** findings are therefore relevant to understand and improve the overall performance of existing high-mobility graphene photodetectors.

关键词： Graphene THz Photodetector Field-effect transistor Plasmonic

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Rendering Grass Blowing in the Wind with Global Illumination

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Tsinghua Science and Technology 2010年第2期15卷 133-137页

作者： n Max S Saito K watanabe M nakajima Computer Science Department University of California Department of Computer Science Tokyo Institute of Technology

We have simulated a time varying wind field using the lattice Boltzmann model, and its effect on blades of grass with a simple mass-spring model. We present a global illumination model for multiple scattering of incident sun and sky illumination within the field of grass. We model the grass as a continuous distribution of infinitesimal colored scattering flakes and solve a system of differential equations for the radiance transport. We repeat this for a collection of grass bending directions and amounts, and then interpolate the solutions when rendering animations of blowing grass.

关键词： global illumination lattice Boltzmann method plane parallel radiation transport

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Studies of multilayer structure in depth direction by soft X-ray spectroscopy

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nuclear Science and Techniques 2006年第5期17卷 257-267页

作者： M. watanabe T. EJIMA n. MIYATA T. IMAZOnO M. YAnAGIHARA Shanghai Dianji University Institute of Composite Materials Shanghai Jiaotong University Shanghai 200030 China Saga University Synchrotron Light Application Center Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku University Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku University

It is demonstrated that two kinds of soft X-ray spectroscopy are useful as nondestructive methods to in- vestigate multilayer structures modified by interdiffusion or by chemical reaction of adjoining layers in depth direc- tion. One is the total electron yield (TEY) spectroscopy involving angular dependence measurement. Using this method, it was found that in LiF/Si/LiF trilayers, the Si layers exhibited a characteristic similar to porous Si, and in CaF2/Si/CaF2 trilayers, it was found that CaF2 segregated through the Si layer. Moreover, it has been shown that the thickness of the top layer of a Mo/Si X-ray multilayer can be determined by analyzing TEY signals generated by the standing wave. The other is the soft X-ray emission spectroscopy involving spectral shape analysis. Using this method, it was found that in Mo/Si X-ray multilayers, the interdiffusion or chemical reaction giving rise to deterioration of re- flectance character occurs in as-deposited samples as well as in heated samples. In antiferromagnetic Fe/Si multilay- ers, it was confirmed that there was no existence of pure Si layers, but insulating FeSi2 layers were present. This result suggests that the source of antiferromagnetic coupling is not conduction electrons but quantum wave interference.

关键词：软X射线能谱多层结构景深方向总电子流量驻波硅化合物

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