检索结果-南通市图书馆

American Journal of Plant Sciences 2011年第2期2卷 111-119页

作者： hiroshi Hayakawa Yukio Minaniya Katsura ito Yoshinori Yamamoto Tatsuya Fukuda 不详

Curcumin, which is traditionally known to have effects on various types of diseases in humans, is found in Curcuma longa L. Previous reports have indicated that the curcumin content varies between the different lines of this species. To clarify the differences in the amounts of curcumin between the lines, we investigated the outcomes of cultivation ex-periments with the hybridization or introgression between C. longa and other Curcuma species using the matK gene of chloroplast DNA (cpDNA) and the external transcribed spacer (ETS) of nuclear DNA (nrDNA). The results show that there is heterogeneity of the ETS and incongruence between the matK and the ETS phylogenetic trees, suggesting that hybridization and introgression had taken place in the diversification of the various lines of C. longa. Moreover, al-though all of the lines had the same cpDNA haplotype of C. longa, the lines of homogeneous C. longa had a high con-tent of curcumin, whereas the lines created by hybridization and introgression with other Curcuma species had a me-dium or low level. These results suggest that the difference of curcumin content among the various lines of C. longa was caused by hybridization and introgression with other Curcuma species.

关键词： Curcuma longa Curcumin Hybridization Introgression Molecular analysis Nuclear DNA

Guadalupian (Middle Permian) Radiolarian and Sponge Spicule Faunas from the Bancheng Formation of the Qinzhou Allochthon,South China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2013年第2期24卷 145-156页

作者： ito Tsuyoshi 张磊冯庆来 Matsuoka Atsushi State Key Laboratory for Geological Processes and Mineral Resources China University of Geosciences Graduate School of Science and Technology Niigata University Department of Geology Faculty of ScienceNiigata University

The Gujingling （古井岭） Section in Xiaodong （小董）, Guangxi （广西） Zhuang Autonomous Region, China, consists of cherts and siliceous siltstones, which belongs to the Bancheng （板城）Formation of the Qinzhou （钦州） allochthon. Three successive radiolarian assemblage-zones related to the Guadalupian （Middle Permian） appear in the section in the following ascending order： Pseudoalbaillella sp. aff. Pseudoaibailleila longicornis-Pseudoalbaillella fusiformis, Follicucuilus monacanthus, and Follicucuilus scholasticus-Foilicucullus porrectus. The radiolarian content in this section is generally greater than that of sponge spicules. The radiolarian fauna commonly consists of abundant Albaillellaria and spherical radiolaria with minor Latentifistularia and Entactinaria. The sponge fauna is composed mainly of hexactinellids with minor demosponges. These siliceous fossil faunal features, comparable with those in a deep basin of the western belt of the Phosphoria Basin in the western United States, indicate that the Bancheng Formation in the Gujingling Section was deposited in a basin deeper than 1 000 m. The siliceous siltstones in the section are characterized by inclusion of silt-sized quartz and no inclusion of sand-sized materials, suggesting that the Gujingling Section was located at least a few hundred kilometers from the South China Block in the Guadalupian.

关键词： radiolarian fossil sponge spicule Guadalupian (Middle Permian) Bancheng Formation Qinzhou allochthon paleobathymerry.

Effects of Vertical Angle of Conical Punch on Stretch Flangeability of High Strength Steel

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2015年第12期28卷 1503-1509页

作者： Yasuhiro ito Yoshiaki Nakazawa Yukihisa Kuriyama Katsuyuki Suzuk Noriyuki Suzuki Nippon Steel and Sumitomo Metal Corporation The University of Tokyo

To clarify the effects of the vertical angle of a conical punch on stretch flangeability, hole expansion forming tests were conducted. Test results showed that the hole expansion ratio becomes larger as the vertical angle *** also showed that the fracture strain at the fracture location on the hole edge was constant and independent of the vertical angle. This is because the hole expansion ratio was controlled not only by the fracture strain, which is independent of the vertical angle, but also by deformation uniformity along the hole edge. From the result of numerical analyses, it was determined that deformation uniformity depends on the gradient of circumferential stress along the radius direction. When the vertical angle is sharp, the circumferential stress showed a steep decline and the deformation localization was suppressed. Consequently, the hole edge deformed more uniformly and the hole expansion ratio became larger. It is concluded that in order to improve stretch flangeability of high strength steel, it is important to uniformly deform the hole edge by applying a conical punch with a sharp vertical angle.

关键词： Formability Ductile fracture Finite element analysis Hole expansion test

A Blowdown Cryogenic Cavitation Tunnel and CFD Treatment for Flow Visualization around a Foil

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2005年第4期14卷 346-351页

作者： Yutaka ito Kazuya SAWASAKI Naoki TANI Takao NAGASAKI Toshio NAGASHIMA Tokyo Institute of Technology G3-334259Nagatsuta-choMidori-kuYokohama226-8502Japan Honda Motor Co.Ltd. 2-1-1Minami-AoyamaMinato-kuTokyo107-8556Japan Japan Aerospace Exploration Agency 2-1-1SengenTsukuba305-8505Japan University of Tokyo 7-3-1HongoBunkyo-kuTokyo113-8656Japan

成穴是在火箭引擎的发展的主要问题之一。有很少试验性的研究设想低温实验法的陪衬成穴。因此， blowdown 类型的一条新低温实验法的成穴隧道被造。陪衬形状是鈥減l ano 凸的鈥吗？因为简洁，这侧面被选择，而且类似于为火箭 inducer im... 详细信息

成穴是在火箭引擎的发展的主要问题之一。有很少试验性的研究设想低温实验法的陪衬成穴。因此， blowdown 类型的一条新低温实验法的成穴隧道被造。陪衬形状是鈥減l ano 凸的鈥吗？因为简洁，这侧面被选择，而且类似于为火箭 inducer impeller 的。工作液体是在房间温度，热水和液体氮的水。在攻击(AOA )=8 掳的角度的情况下，期刊洞离开在 90 掳 C 和氮在两水的实验被观察在 ? 在一样的速度下面的 190 掳 C 10 m/sec 和一样的成穴数 0.7。频率被观察分别地，是 110 和 90 Hz 并且几乎旋涡从陪衬流与那些与一致。温度消沉特别在低温实验法的成穴在实验和模拟由于热力学的效果被证实。关键词成穴 - 隧道 - 致冷剂 - CFD - 可视化 - 模拟 - 陪衬 CLC 数字

关键词：低温气穴通道空气动力学 CFD 火箭工程

Self-calibration and Compensation of Setting Errors for Surface Profile Measurement of a Microstructured Roll Workpiece

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2014年第1期27卷 14-22页

作者： GAO Wei XU Bin TAKEISHI Toshiki SHIMIZU Yuki ito So Department of Nanomechanics Tohoku University School of Manufacturing Science and Engineering Sichuan University

Microstructured roll workpieces have been widely used as functional components in the precision industries. Current researches on quality control have focused on surface profile measurement of microstructured roll workpieces, and types of measurement systems and measurement methods have been developed. However, low measurement efficiency and low measurement accuracy caused by setting errors are the common disadvantages for surface profile measurement of microstructured roll workpieces. In order to shorten the measurement time and enhance the measurement accuracy, a method for self-calibration and compensation of setting errors is proposed for surface profile measurement of microstructured roll workpieces. A measurement system is constructed for the measurement, in which a precision spindle is employed to rotate the roll workpiece and an air-bearing displacement sensor with a micro-stylus probe is employed to scan the microstructured surface of the roll workpiece. The resolution of the displacement sensor is 0.14 nm and that of the rotary encoder of the spindle was 0.15r~. Geometrical and mathematical models are established for analyzing the influences of the setting errors of the roll workpiece and the displacement sensor with respect to the axis of the spindle, including the eccentric error of the roll workpiece, the offset error of the sensor axis and the zero point error of the sensor output. Measurement experiments are carded out on a roll workpiece on which periodic microstructures are a period of 133 i^m along the circumferential direction. Experimental results demonstrate the feasibility of the self-compensation method. The proposed method can be used to detect and compensate the setting errors without using any additional accurate artifact.

关键词： measurement profile setting error self-calibration compensation microstructure roll workpiece

Role of androgen receptor in prostate cancer

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 1999年第3期1卷 81-85页

作者： Hiroyoshi Suzuki Haruo ito Department of Urology Chiba University School of Medicine I-8-I Inohana Chuo-ku Chiba-shi Chiba 260-8670 JapanDepartment of Urology Chiba University School of Medicine I-8-I Inohana Chuo-ku Chiba-shi Chiba 260-8670 Japan

The growth of prostate cancer is sensitive to androgen, and hormonal therapy has been used for treatment of ad-vanced cancer. About 80% of prostate cancers initially respond to hormonal therapy, howerver, more than half of the re-sponders gradually become resistant to this therapy. Changes in tumors from an androgen-responsive to an androgen-unre-sponsive state have been widely discussed. Since androgen action is mediated by androgen receptor (AR), abnormalitiesof AR is believed to play an important role of the loss of androgen responsiveness in prostate cancer. This article focusedon the role of AR in the progression of prostate cancer. (Asian J Androl 1999 Sep; 1: 81-85)

关键词： androgen receptors prostatic neoplasms genetic change methylation

Molecular Dynamics Simulation of Bombardment of Hydrogen Atoms on Graphite Surface

在线全文

学校读者我要写书评

暂无评论

Communications in Computational Physics 2008年第8期4卷 592-610页

作者： A.ito H.Nakamura Department of Physics Graduate School of ScienceNagoya UniversityFuro-choChikusa-kuNagoya 464-8602Japan Department of Simulation Science National Institute for Fusion Science322-6 Oroshi-choToki 509-5292Japan

The new potential model of interlayer intermolecular interaction was proposed to represent“ABAB”stacking of *** bombardment of hydrogen atoms on the graphite surface was investigated using molecular dynamics *** the first graphene fromthe surface side was broken,the hydrogen atoms caused the following *** the case of the incident energy of 5 eV,many hydrogen atoms were adsorbed on the front of the first *** the case of the incident energy of 15 eV,almost all hydrogen atoms were reflected by the first *** the case of the incident energy of 30 eV,the hydrogen atoms were adsorbed between the first and second *** radial distribution function and the animation of the MD simulation demonstrated that the graphenes were peeled off one by one,which is called graphite *** C2H2 was generated in such chemical *** the other yieldedmolecules often had chain structures terminated by the hydrogen *** erosion yield increased linearly with time.

关键词： Plasma surface interaction chemical sputtering graphite graphene hydrogen atom

Diffusion-weighted MRI in abdominal oncology:Clinical applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2010年第7期16卷 832-836页

作者： Reiji Sugita Kei ito Naotaka Fujita Shoki Takahashi Department of Radiology Sendai City Medical CenterSendai 983-0824Japan Department of Gastroenterology Sendai City Medical CenterSendai 983-0824Japan Department of Diagnostic Radiology Graduate School of MedicineTohoku UniversitySendai 980-8574Japan

Diffusion-weighted magnetic resonance imaging(DWI) provides image contrast that is different from that obtained by conventional magnetic resonance *** previously,DWI has been used to evaluate various diseases of the central nervous system,several technical advances have expanded the clinical applications of DWI beyond the central nervous *** a result,many reports have been published on the use of DWI in abdominal ***,abdominal DWI has now being focused on evaluation of patients with abdominal *** can be used for pretreatment tumor detection,characterization including predicting tumor response to therapy,monitoring tumor response during therapy,and follow-up study after treatment to detect possible tumor recurrence.

关键词： Diffusion weighted magnetic resonance imaging Abdominal neoplasms

Surface Emitting THz Wave Parametrical Oscillator Using MgO：LiNbO3

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2007年第11期24卷 3153-3156页

作者：张显斌施卫 T. Ikari H. ito Department of Physics Xi'an University of Technology Xi'an 710048 Photo Dynamics Research Center RIKEN 519-1399 Aramaki-Aoba Sendai 980-8577 Japan

Room-temperature operation terahertz （THz） wave source is demonstrated using three MgO：LiNbO3 crystals which have a noncollinear arrangement. The experimental results show that the THz wave can be tunable from 0.8 THz to 3.0 THz, and the peak energy output is 103 pJ/pulse at 1.5 THz. The noncoilinear cavity configuration makes the THz beam have Gaussian-like spatial distribution, small divergence angle, perpendicularly eradiated from the crystal surface. The beam quality factor M2 is measured to be Mx^2 = 1.15, Mx^2 = 1.25 for characterizing the THz wave beam. Experiments also show that the THz beam can be focused by using a polyethylene lens, and the focal spot size is close to the diffraction limit.

关键词： coated conductor buffer layer self-epitaxy CeO2

Design and Development of Oblique-Incident Interferometer for Form Measurement of Hand-Scraped Surfaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nanomanufacturing and Metrology 2021年第2期4卷 69-76页

作者： So ito Daiki Kameoka Kimihisa Matsumoto Kazuhide Kamiya Department of Intelligent Robotics Faculty of EngineeringToyama Prefectural University5180KurokawaImizuToyama939-0398Japan

Precision flat surfaces finished by hand-scraping are extensively used in the sliding parts of precision positioning systems or the surface plates of precision measuring *** hand-scraped surfaces are employed to improve the flatness of the machined surfaces and the motion accuracy of the *** numerous depressions of micrometer-scale depth on a scraped surface are thought to prevent wringing and improve the lubrication properties by forming oil *** measurement of the micrometer-scale features of a hand-scraped surface is one of the reasonable methods for investigating its effect on the motion accuracy of the positioning systems or the lubrication properties of the sliding *** a hand-scraped surface is a rough surface composed of micrometric complex features,it is difficult to conduct precision measurement of the three-dimensional surface form using conventional measurement instruments,such as vertical-incident interferometers or stylus-type *** this study,an oblique-incident interferometer based on Abramson interferometry is introduced to measure the form of a rough surface produced by *** this technique can detect high-intensity reflected light on a rough surface,it allows the measurement of the form of the hand-scraped surface in noncontact *** order to shorten the measurement time,the form calculation based on a five-step phase shifting method was introduced.

关键词： Oblique-incident interferometer Abramson interferometry Hand-scraped surface Rough surface Surface form measurement