检索结果-南通市图书馆

Journal of Rare Earths 2018年第5期36卷 449-455页

作者： D. Suresh m. yamashita T. Akai a National Institute for Advanced Industrial Science and Technology （AIST） Kansai Center 1-8-31 Midorigaoka lkeda Osaka 563-8577 Japan 6 Department of Chemistry School of Chemical and Biotechnology SASTRA Deemed University Thanjavur 613 401 India

Divalent europium（Ⅱ）-doped mesoporous silicon oxy-nitride materials, as a novel type of nanoscopic photoluminescent material, are studied in which the optically active luminescent centers are isolated within the pores. Colorless and transparent blue emitting luminous Eu2＋-doped mesoporous silicon oxy-nitride materials were prepared from mesoporous silica via impregnation, nanocasting and nitrogen-assisted carbothermal reduction and nitridation method. The morphology and porosity of the silica remain unchanged during the synthesis process as revealed by SEm images and by nitrogen sorption studies. Photoluminescence studies reveal a strong blue emission band for Eu2＋ centered at 425 nm with a quantum efficiency of 47%. The luminescent intensity is greatly influenced by the amount of co-dopant, AI3＋ ions.

关键词： Blue luminescence Divalent europium mesoporous silicon oxy-nitride Carbothermal reduction and nitridation(CRN) Rare earths

multi-Functional Nano-Sciences of Advanced metal Complexes:Photo-Induced Switching between Single-Chain Quantum magnet and Paramagnet,and Conducting Single-molecule Quantum magnets

在线全文

学校读者我要写书评

暂无评论

复旦学报（自然科学版） 2007年第5期46卷 553-页

作者： m.yamashita Graduate School of Science Tohoku University & CREST(JST)Aramaki-Aza-Aoba Aoba-kuSendai 980-8578Japan

1 Results In the fields of the molecule-based magnets,the quantum molecular magnets have been attracting much attention. While the bulk magnets or classic magnets are based on the 3D ferro- or ferrimagnetic interaction,the quantum molecular magnets are based on the double-well potential barrier defined with DS2,where D and S are uni-axial anisotropy and spin quantum number,***,while the memory capacity of the bulk magnets such as floppy disc is 109 bits,the quantum magnets may have th...

关键词： single-chain quantum magnets conducting single-molecule magnets multi-functionality

在线全文

学校读者我要写书评

暂无评论

茶树留新叶采摘对碳氮化合物含量的影响

广东茶业 1987年第2期 52-54+57页

作者： m.yamashita 黄建安

日本的头茶、二茶和三茶的采摘期分别在4～5月、6～7月和8～9月。相对而言,头茶的新梢生长主要依靠上年储存的碳水化合物供应营养物质,随着头茶的生长与采摘,贮存的碳水化合物不断被消耗而减少。因此,二、三茶的生长主要依靠光合作用供... 详细信息

日本的头茶、二茶和三茶的采摘期分别在4～5月、6～7月和8～9月。相对而言,头茶的新梢生长主要依靠上年储存的碳水化合物供应营养物质,随着头茶的生长与采摘,贮存的碳水化合物不断被消耗而减少。因此,二、三茶的生长主要依靠光合作用供应营养物质。据此认为,在头茶采摘时留养一批新叶,对保持二、三茶高强度的光合作用,从而提高二、三茶的产量与品质将起重要的作用。

关键词：茶树 SP LP 新梢长度新叶头茶碳水化合物糖类夏茶二番茶茶叶修剪面留养

Characterization and manipulation of Spin of Single-molecule-magnet Double-Decker Phthalocyanine molecule

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Characterization and Manipulation of Spin of Single-Molecule...

Extended cancer-free survival after palliative chemoradiation for metastatic esophageal cancer

中国化学会第29届学术年会

作者： Tadahiro Komeda H.Isshiki J.Liu K.Katoh m.yamashita Roberto Robles Nicolás Lorente Institute of multidisciplinary Research for Advanced materials (ImRAm Tagen)Tohoku University2-1-1KatahiraAoba-KuSendai 980-0877Japan Department of Chemistry Tohoku UniversityAramaki-Aza-Aoba Aoba-Ku Sendai 980-8578 Japan Centro de Investigación en Nanociencia y Nanotecnología CIN2 (CSIC-ICN) Campus de la UABE-08193 BellaterraSpain

＜正＞A research field of molecular spintronics attracts *** of advantages of organic molecules for the use in spintronics devices is that the spin and electronic states are strongly correlated with their *** using‘molecule switching’with outer simulations like as current and light,a single spin of a single molecule could be *** this talk,we demonstrate spin detection and manipulation for a single molecule magnet

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2014年第2期6卷 52-54页

作者： Hideomi yamashita Kae Okuma Akihiro Nomoto mami yamashita Hiroshi Igaki Keiichi Nakagawa Departments of Radiology University of Tokyo Hospital Departments of Palliative Care Unit University of Tokyo Hospital

We report on a patient who remained cancer-free for an extended time after palliative radiotherapy(RT) and chemotherapy(nedaplatin plus 5-fluorouracil) treatment for stage Ⅳ(cT3N3m1) esophageal squamous cell carcinoma. Although multiple lymph nodes outside the RT field recurred, the local primary tumor within the RT field did not recur, even 17 mo after palliative RT of 30 Gy in 10 fractions. In this case, acute toxicity, such as myelosuppression or esophagitis, was not enhanced by increasing the fraction dose from 1.8-2.0 Gy to 3.0 Gy. Because 30 Gy in 10 fractions can be completed within a shorter time and is less expensive than 50.4 Gy in 28 fractions, we think that 30 Gy without oblique beams is a more favorable RT method for patients.

关键词： Radiotherapy Chemotherapy Esophageal cancer Esophageal stenosis metastatic esophageal cancer

Ru complex and N,P-containing polymers confined within mesoporous hollow carbon spheres for hydrogenation of CO_(2)to formate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2023年第4期16卷 4515-4523页

作者： Guoxiang Yang Yasutaka Kuwahara Kohsuke mori Catherine Louis Hiromi yamashita Division of materials and manufacturing Science Graduate School of EngineeringOsaka University2-1 Yamada-okaSuitaOsaka 565-0871Japan Institute for Open and Transdisciplinary Research Initiatives(OTRI) Osaka University2-1 Yamada-okaSuitaOsaka 565-0871Japan Unit of Elements Strategy Initiative for Catalysts&Batteries(ESICB) Kyoto UniversityKatsuraKyoto 615-8520Japan JST PRESTO4-1-8 HonchoKawaguchiSaitama 332-0012Japan Sorbonne Université CNRSLaboratoire de Réactivitéde SurfaceLRSF-75005 ParisFrance

The development of reliable catalysts with both excellent activity and recyclability for carbon dioxide(CO_(2))hydrogenation is ***,a ternary hybrid heterogeneous catalyst,involving mononuclear Ru complex,N,P-containing porous organic polymers(POPs),and mesoporous hollow carbon spheres(Ru^(3+)-POPs@mHCS)is reported for CO_(2)hydrogenation to *** on comprehensive structural analyses,we demonstrated that Ru^(3+)-POPs were successfully immobilized within *** optimized Ru^(3+)-0.5POPs@mHCS catalyst,which was obtained with about 5 wt.%Ru^(3+)and 0.5 mmol POPs polymers confined into 0.3 g mHCS,exhibited high catalytic activity for CO_(2)hydrogenation to formate(turnover number(TON)>1,200 for 24 h under mild reaction conditions(4.0 mPa,120℃))and improved durability,compared to Ru^(3+)catalysts without POPs polymers(Ru^(3+)-mHCS)and unencapsulated mHCS(Ru^(3+)-0.5POPs)*** improved catalytic performance is attributed to the high surface area and large pore volume of mHCS which favors dispersion and stabilization of Ru^(3+)-***,the mHCS and POPs showed high CO_(2)adsorption ***^(3+)-POPs encapsulated into mHCS reduces the activation energy barrier for CO_(2)hydrogenation to formate.

关键词： heterogeneous catalysis porous organic polymers(POPs) mesoporous hollow carbon spheres CO_(2)hydrogenation formate synthesis

Unsupervised learning of charge-discharge cycles from various lithium-ion battery cells to visualize dataset characteristics and to interpret model performance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy and AI 2024年第3期17卷 397-405页

作者： Akihiro yamashita Sascha Berg Egbert Figgemeier Helmholtz Institute münster:Ionics in Energy Storage(ImD-4/HI mS) Forschungszentrum JülichJülichGermany Institute for Power Electronics and Electrical Drives(ISEA) RWTH Aachen UniversityAachenGermany Jülich Aachen Research Alliance JARA-EnergyGermany

machine learning (mL) is a rapidly growing tool even in the lithium-ion battery (LIB) research field. To utilize this tool, more and more datasets have been published. However, applicability of a mL model to different information sources or various LIB cell types has not been well studied. In this paper, an unsupervised learning model called variational autoencoder (VAE) is evaluated with three datasets of charge-discharge cycles with different conditions. The model was first trained with a publicly available dataset of commercial cylindrical cells, and then evaluated with our private datasets of commercial pouch and hand-made coin cells. These cells used different chemistry and were tested with different cycle testers under different purposes, which induces various characteristics to each dataset. We report that researchers can recognise these characteristics with VAE to plan a proper data preprocessing. We also discuss about interpretability of a mL model.

关键词： Unsupervised learning Dimensionality reduction Inductive bias .machine learning Variational autoencoder

New roles of osteoblasts involved in osteoclast differentiation

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 Orthopedics 2012年第11期3卷 175-181页

作者： Teruhito yamashita Naoyuki Takahashi Nobuyuki Udagawa Institute for Oral Science Matsumoto Dental University1780 GobaraHirookaShiojiriNagano 399-0781Japan Department of Biochemistry Matsumoto Dental University1780 GobaraHirookaShiojiri and Nagano 399-0781Japan

Bone-resorbing osteoclasts are formed from a monocyte/macrophage lineage under the strict control o bone-forming osteoblasts. So far,macrophage colonystimulating factor(m-CSF),receptor activator o nuclear factor-κB ligand(RANKL),and osteoprotegerin(OPG) produced by osteoblasts play major roles in the regulation of osteoclast differentiation. Recent studies have shown that osteoblasts regulate osteoclastogenesis through several mechanisms independent o m-CSF,RANKL,and OPG production. Identification o osteoclast-committed precursors in vivo demonstrated that osteoblasts are involved in the distribution o osteoclast precursors in bone. Interleukin 34(IL-34)a novel ligand for c-Fms,plays a pivotal role in maintaining the splenic reservoir of osteoclast-committed precursors in m-CSF deficient mice. IL-34 is also able to act as a substitute for osteoblast-producing m-CSF in osteoclastogenesis. Wnt5 a,produced by osteoblasts,enhances osteoclast differentiation by upregulating RANK expression through activation of the noncanonical Wnt pathway. Semaphorin 3A produced by osteoblasts inhibits RANKL-induced osteoclast differentiation through the suppression of immunoreceptortyrosine-based activation motif signals. Thus,recent findings show that osteoclast differentiation is tightly regulated by osteoblasts through several different mechanisms. These newly identified molecules are expected to be promising targets of therapeutic agents in bone-related diseases.

关键词： Osteoclast Osteoblast Receptor activator of nuclear factor-κB ligand Wnt5a Semaphorin 3A Interleukin 34

magnetic relaxation behavior of a spatially closed dysprosium(Ⅲ) phthalocyaninato double-decker complex

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2012年第6期55卷 918-925,1178-1184页

作者： KATOH Keiichi UmETSU Kaori BREEDLOVE BRIAN K. yamashita masahiro Department of Chemistry Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Aoba-ku Sendai Miyagi 980-8578 Japan

The Smm properties of the spatially closed Dy（Ⅲ） double-decker Pc complex Dy（obPc）2 （1）, which is equivalent to a pseudo dinuclear complex, are reported. Complex 1 crystallized with ethanol in the crystal lattice in the monoclinic space group P22/n and was isomorphous with Tb（obPc）2 （3）, which is arranged in a dimer structure along the b axis. The intermetallic Dy-Dy distance was determined to be 0.756 nm. ZmT versus T plots for 1 decreased with a decrease in T, which suggests the existence of an antiferromagnetic （AF） interaction between the Dy3＋ ions. The m-H curve for 1 at 1.8 K showed magnetic hysteresis. In ac susceptibility measurements on a powder sample of 1, which were dependent on the applied ac field, indicating that 1 is an single molecule magnet （Smm）, a maximum appeared at 22 K at an ac frequency 09 of 1488 Hz. The shape of the peaks dras- tically changed, and the peaks did not shift when an Hd~ large enough to suppress the quantum tunneling of the magnetization （QTm） was applied. The energy barrier （A/hc） was estimated to be 44 cm-1 with a pre-exponential factor （r0） of 1.6 × 10-5 s from an Arrhenius plot. Our results suggest that the Smm/magnetic properties of 1 significantly change in a dc magnetic field. These relaxation mechanisms are related to the energy gap of the ground state and to QTm.

关键词： single-molecule magnets dysprosium double-decker complex pseudo dinuclear complex magnetic relaxation process

Quantitative index calculated by ^(99m)Tc-GSA scintigraphy

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Cancer Research 2014年第6期26卷 641-643页

作者： morikatsu Yoshida Shinya Shiraishi Noriko Tsuda Fumi Sakamoto Seiji Tomiguchi Yasuyuki yamashita Department of Diagnostic Radiology Graduate School of Life Sciences Kumamoto University Department of Diagnostic medical Imaging School of Health Faculty of Life Sciences Kumamoto University

99mTc-galactosyl human serum albumin（GSA） scintigraphy is useful to evaluate hepatic function and hepatic functional reserve. A reliable SPECT and CT integrated system is now commercially available. Using this system, we can obtain 99mTc-GSA SPECT/CT fused imaging with a small registration error. Therefore, the 99mTc-GSA scintigraphy techniques prove more useful in clinical practice than have been previously reported. In the latest Annals of Surgical Oncology on Oct 2014, the uptake index（UI） values calculated from 99mTc-GSA scintigraphy are reported to be useful for predicting the functional reserve of the future remnant liver. In this paper, we describe the usefulness of 99mTc-GSA scintigraphy as well as some cautions that are necessary as regards using the system.

关键词： 99mTc-GSA scintigraphy SPECT/CT uptake index(UI)