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A NEW HYBRID COMPOUND ISOLATED FROM UNCARIA GAMBIR LEAVES

第八届全国药用植物及植物药学术研讨会

作者： Eerdunbayaer Hideyuki ITO tsutomu hatano Okayama University Graduate School of Medicine Dentistry and Pharmaceutical SciencesTsushimaOkayama 700-8530 Japan

Previous investigation on the polyphenolic constituents and their pharmacological properties in medicinal and food plants revealed structural variation of polyphenolic compounds and their participation in the antioxidant effects of the plant extracts.Leaves of Psidium guajava L.have been used in traditional medicine in Asian countries.We already reported various structures of hydrolyzable tannins and flavonoids in the leaves,

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A NEW HYBRID COMPOUND ISOLATED FROM UNCARIA GAMBIR LEAVES

蒙古黄芪花化学成分的分离鉴定及其抗氧化活性的研究

多学科交叉，产学研联合，实现西部药用植物资源的可持续利...

作者： Mizuho HARADA Shoko TANIGUCHI Kou-ichi DOI Takashi SHIBATA Hideyuki ITO tsutomu hatano Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences1-1-1 TsushimaKita-kuOkayama 700-8530Japan Taiko Pharmaceutical Co. Ltd.3-34-14 UchihonmachiSuita 564-0032Japan

Aqueous extract of leaves and young twigs of Uncaria gambir Roxb.has been used as a spice under the name of gambir.Gambir has also been utilized for treatments of diarrhea and sore throats. The major constituent is(+)-catechin and the presence of several chalcane-flavan dimers,which are structurally related to(+)-catechin,in gambir has also been revealed.Although some characteristic indole alkaloids such as gambirtannine have also been reported as the constituents,

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内蒙古大学学报（自然科学版） 2020年第1期51卷 92-96页

作者：姚天宁张倩倩陈贵林波多野力内蒙古大学生命科学学院呼和浩特010070 内蒙古自治区中蒙药材规范化生产工程技术研究中心呼和浩特010070 冈山大学药学部冈山700-8530

采用硅胶柱色谱法对蒙古黄芪花提取物进行分离,结合MS,1 H-NMR等波谱手段鉴定化合物的结构,以紫外分光光度法测定分离化合物的抗氧化能力。共分离鉴定出8种化合物,分别为:(1)金丝桃苷,(2)异槲皮苷,(3)7-甲氧基-山萘酚-3-O-半乳糖苷,(4)7... 详细信息

采用硅胶柱色谱法对蒙古黄芪花提取物进行分离,结合MS,1 H-NMR等波谱手段鉴定化合物的结构,以紫外分光光度法测定分离化合物的抗氧化能力。共分离鉴定出8种化合物,分别为:(1)金丝桃苷,(2)异槲皮苷,(3)7-甲氧基-山萘酚-3-O-半乳糖苷,(4)7-甲氧基-山萘酚-3-O-葡萄糖苷,(5)7-甲氧基-山萘酚-3-O-(6"-O-丙二酰基)-β-D-葡萄糖苷,(6)紫云英苷,(7)异鼠李素-3-O-β-D-吡喃葡萄糖苷,(8)毛蕊异黄酮。其中化合物(3)(4)(5)(7)为首次从黄芪属中分离得到。测定了黄芪花不同粗提物及纯成分的抗氧化活性,其中金丝桃苷与异槲皮苷抗氧化活性最强。

关键词：黄芪花黄酮抗氧化自由基

绒毛诃子果实多酚类化学成分及抗氧化活性研究

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中国现代中药 2013年第12期15卷 1036-1041页

作者：齐敬浩文先陈贵林波多野力内蒙古大学生命科学学院内蒙古呼和浩特010021 内蒙古自治区中蒙药材规范化生产工程技术研究中心内蒙古呼和浩特010021 冈山大学药学部

目的:研究绒毛诃子果实中多酚类化学成分及其抗氧化活性。方法:采用Toyopearl HW-40和MCI gel CHP-20P柱分离并结合制备型高效液相色谱,对诃子70%丙酮提取部分进行分离纯化,利用MS、1H-NMR和13CNMR进行结构鉴定;以紫外分光光度法测定诃... 详细信息

目的:研究绒毛诃子果实中多酚类化学成分及其抗氧化活性。方法:采用Toyopearl HW-40和MCI gel CHP-20P柱分离并结合制备型高效液相色谱,对诃子70%丙酮提取部分进行分离纯化,利用MS、1H-NMR和13CNMR进行结构鉴定;以紫外分光光度法测定诃子多酚类对DPPH·和ABTS+·的清除率。结果:从诃子果实中分离鉴定了9个化合物,分别鉴定为:诃黎勒酸(1)、诃子酸(2)、1,3,4,6-四-O-没食子酰-β-D-葡萄糖苷(3)、1,3,6-三-O-没食子酰-β-D-葡萄糖苷(4)、没食子酸(5)、诃子素(6)、1,2,3,4,6-五-O-没食子酰-β-D-葡萄糖苷(7)、新诃黎勒鞣花酸甲酯(8)、新诃黎勒鞣花酸酯(9)。其中4、8为首次从诃子中分离得到。抗氧化实验中,化合物4的TEAC值为(3.912±0.21)mmol·g-1,抗氧化活性最强,与其他单体化合物比较,差异具有统计学意义(P<0.01),化合物3、5和6的TEAC值与对照品维生素C接近,有较强的抗氧化活性,与对照组比较差异没有统计学意义,但是与其他化合物比较差异具有统计学意义(P<0.01),化合物8的抗氧化活性最低。

关键词：鞣质 NMR 诃子果实抗氧化

Nitrous oxide fluxes from upland soils in central Hokkaido,Japan

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Journal of Environmental Sciences 2008年第11期20卷 1312-1322页

作者： Sonoko D.KIMURA Yo TOMA Ryusuke hatano Graduate School of Agriculture Tokyo University of Agriculture and TechnologyTokyo 183-8509Japan Graduate School of Agriculture Hokkaido UniversitySapporo 060-8589Japan

Nitrous oxide (N2O) fluxes from soils were measured using the closed chamber method during the snow-free seasons (middle April to early November),for three years,in a total of 11 upland crop fields in central Hokkaido,Japan.The annual mean N2O fluxes ranged from 2.95 to 164.17 μgN/(m2·h),with the lowest observed in a grassland and the highest in an onion field.The instantaneous N2O fluxes showed a large temporal variation with peak emissions generally occurring following fertilization and heavy rainfall eve...

关键词： mineral N pool N2O flux soil upland cropping system

Study on Performance and Flow Field of an Undershot Cross-Flow Water Turbine Comprising Different Number of Blades

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Journal of Thermal Science 2017年第5期26卷 413-430页

作者： Yasuyuki Nishi Kentaro hatano Terumi Inagaki Department of Mechanical Engineering Ibaraki University 4-12-1 Nakanarusawa-cho Hitachi-shi Ibaraki 316-8511JAPAN Graduate School of Science and Engineering Ibaraki University 4-12-1 Nakanarusawa-cho Hitachi-shi Ibaraki316-8511 JAPAN

Recently, small hydroelectric generators have gained attention as a further development in water turbine technology for ultra low head drops in open channels. The authors have evaluated the application of cross-flow water turbines in open channels as an undershot type after removing the casings and guide vanes to substantially simplify these water turbines. However, because undershot cross-flow water turbines are designed on the basis of cross-flow water turbine runners used in typical pipelines, it remains unclear whether the number of blades has an effect on the performance or flow fields. Thus, in this research, experiments and numerical analyses are employed to study the performance and flow fields of undershot cross-flow water turbines with varying number of blades. The findings show that the turbine output and torque are lower, the fluctuation is significantly higher, and the turbine efficiency is higher for runners with 8 blades as opposed to those with 24 blades.

关键词：水轮机技术导流叶片性能流场小型水轮发电机水轮机转轮同数贯流式水轮机

Nitrogen Flow in the Rural Ecosystem of Mikasa City in Hokkaido, Japan

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Pedosphere 2006年第2期16卷 264-272页

作者： L. LIANG T. NAGUMO R. hatano Graduate School of Agriculture Hokkaido University Sapporo 060-8589 （Japan）. Center for Education and Research of Field Sciences Shizuoka University Fujieda 426-0001 （Japan） Field Science Center for Northern Biosphere Hokkaido University Sapporo 060-8589 （Japan）

This study of Mikasa City in 2001, which analyzed N flow between N production and N load in seven agricultural and settlement subsystems, i.e., paddy, onion, wheat, vegetable, dairy, chicken, and citizen subsystems, aimed to compare N flow in each subsystem, to determine the main sources of the N load, and to evaluate the influence of agricultural production and food consumption on N cycling in a rural area. The results showed that in Mikasa city, 38.5% of the N load came from point sources and the remainder from non-point sources with intensive vegetable farming imparting a serious N load. Because of the internal N cycling in the dairy subsystem, chemical fertilizer application was reduced by 70.2%, and 23.72 Mg manure N was recycled to the field; therefore, the N utilization efficiency was raised from 18.1% to 35.1%. If all the manure N in the chicken subsystem was recycled, chemical fertilizer application would be reduced by 8.1% from the present level, and the point sources of N pollution would be reduced by 20.8%.

关键词：化学肥料生态系统生态环境氮承载量

Diffusivity Models and Greenhouse Gases Fluxes from a Forest,Pasture,Grassland and Corn Field in Northern Hokkaido,Japan

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Pedosphere 2010年第6期20卷 747-760页

作者： N.V.NKONGOLO R.hatano V.KAKEMBO Harvard Forest Faculty of Arts and SciencesHarvard University Laboratory of Science Division of Environmental ResourcesGraduate School of Agriculture Hokkaido University Department of Geosciences School of Environmental SciencesFaculty of ScienceNelson Mandela Metropolitan University

Information on the most influential factors determining gas flux from soils is needed in predictive models for greenhouse gases emissions.We conducted an intensive soil and air sampling along a 2 000 m transect extending from a forest,pasture,grassland and corn field in Shizunai,Hokkaido (Japan),measured CO 2 ,CH 4 ,N 2 O and NO fluxes and calculated soil bulk density (ρ b ),air-filled porosity (f a ) and total porosity (Φ).Using diffusivity models based on either f a alone or on a combination of f a and Φ,we predicted two pore space indices: the relative gas diffusion coefficient (D s /D o ) and the pore tortuosity factor (τ).The relationships between pore space indices (D s /D o and τ) and CO 2 ,CH 4 ,N 2 O and NO fluxes were also studied.Results showed that the grassland had the highest ρ b while f a and Φ were the highest in the forest.CO 2 ,CH 4 ,N 2 O and NO fluxes were the highest in the grassland while N 2 O dominated in the corn field.Few correlations existed between f a ,Φ,ρ b and gases fluxes while all models predicted that D s /D o and τ significantly correlated with CO 2 and CH 4 with correlation coefficient (r) ranging from 0.20 to 0.80.Overall,diffusivity models based on f a alone gave higher D s /D o ,lower τ,and higher R 2 and better explained the relationship between pore space indices (D s /D o and τ) and gases fluxes.Inclusion of D s /D o and τ in predictive models will improve our understanding of the dynamics of greenhouse gas fluxes from soils.D s /D o and τ can be easily obtained by measurements of soil air and water and existing diffusivity models.

关键词：温室气体排放量扩散系数预测模型北海道玉米田通量森林草地

A Newly Developed Non-Destructive Tritium Measurement Technique and Its Application to V-4Cr-4Ti Alloy

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Plasma Science and Technology 2006年第6期8卷 741-744页

作者：刘翔陈学 H.HOMMA Y.hatano M.MATSUYAMA Southwestern Institute of Physics Chengdu 610041China Sichuan General Fire Brigade Chengdu 610072China Hydrogen Isotope Research Centre Toyama UniversityGofuku 3190Toyama 930-8555Japan

A non-destructive and in-situ technique for the measurement of tritium in materials, namely β-ray-induced X-ray spectrometry （BIXS）, has been developed recently. In the present study a V-4Cr-4Ti alloy was pre-heated at 1000℃ for 2 h to form a recrystallization structure before the tritium absorption experiments were conducted. Firstly the hydrogen isotope gas was charazterized by means of a quadrupole mass spectrometer （QMS） and a small-sized ionization chamber. Then hydrogen isotope absorption tests of V-4Cr-4Ti alloy were performed at 400 ℃ and the atomic concentration of hydrogen isotope in V-4Cr-4Ti alloy was estimated as 0.17% with a tritium content of approximately 2.5 ppm. Experimental results indicate that BIXS is a quite useful tool for quantitatively measuring the tritium content and tritium distribution in the surface layers of vanadium alloys and no strong trapping effects of tritium exist in the pre-heated V-4Cr-4Ti alloy.

关键词： tritium V-4Cr-4Ti β-ray-induced X-ray spectrometry tritium measurements