检索结果-南通市图书馆

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

蜂王精液利用:DNA指纹分析

养蜂科技 2002年第4期 31-32页

作者：颜伟玉饶波 Ken SASAKI toshiyuki satoh Yoshiaki OBARA 江西农业大学蜜蜂研究所 330045

已经确认蜂王是高度多雄交配的，每只与7—17倍的不同雄蜂进行交配。蜂王与每只雄蜂每次交配时可获得6百万个精子。它们中的大部分(5.3—5.7百万)在交配后达40小时这段时间内被转到储精囊，并储存在那里。这些精子被蜂王在1—2年内受精... 详细信息

已经确认蜂王是高度多雄交配的，每只与7—17倍的不同雄蜂进行交配。蜂王与每只雄蜂每次交配时可获得6百万个精子。它们中的大部分(5.3—5.7百万)在交配后达40小时这段时间内被转到储精囊，并储存在那里。这些精子被蜂王在1—2年内受精时所利用。要知道各工蜂的基因组成就必须研究精液……

关键词：蜂王精液 DNA 指纹分析

Structural Analysis of Eu_2Mn_(2/3)Ta_ 4/3O_7 with a Pyrochlore-Related Structure

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2004年第1期22卷 172-174页

作者：陈刚 satoh Hirohisa Kamegashira Naoki Department of Applied Chemistry Department of Materials Science

Eu 2Mn 2/3Ta 4/3O 7 specimen was synthesized from Eu 2O 3, MnO and Ta 2O 5 in a reducing atmosphere. Structure analysis was carried out by Rietveld method from X-ray diffraction data. The X-ray diffraction profile calculated with monoclinic C2/c model was in a good agreement with the observed X-ray diffraction patterns since several small peaks of super lattice could be also assigned with C2/c symmetry in addition to fundamental reflection peaks. Eu 2Mn 2/3Ta 4/3O 7 has two kinds of distorted (Mn, Ta)O 6 octahedra and HTB layers, which deviates from the regular forms. Europium atoms coordinate to eight or seven oxygen atoms and lead to two kinds of polyhedra, EuO 8 and EuO 7 in this compound.

关键词： complex oxide structural analysis X-ray diffraction rare earths

Endothelin-1 stimulates contraction and migration of rat pancreatic stellate cells

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2005年第39期11卷 6144-6151页

作者： Atsushi Masamune Masahiro satoh Kazuhiro Kikuta Noriaki Suzuki Kennichi satoh Tooru Shimosegawa Division of Gastroenterology Tohoku University Graduate School of Medicine SendaiJapan

AIM： To examine the ability of FT-1 to affect the cell functions of PSCs and the underlying molecular mechanisms. METHODS： PSCs were isolated from the pancreas of male Wistar rats after perfusion with collagenase, and cells between passages two and five were used. Expression of ET-1 and FT receptors was assessed by reverse transcription-PCR and immunostaining. Phosphorylation of myosin regulatory light chain （MLC）, extracellular-signal regulated kinase （FRK）, and Akt was examined by Western blotting. Contraction of PSCs was assessed on hydrated collagen lattices. Cell migration was examined using modified Boyden chambers. Ceil proliferation was assessed by measuring the incorporation of 5-bromo-2＇- deoxyuridine. RESULTS： Culture-activated PSCs expressed ETA and ETB receptors, and ET-1. ET-1 induced phosphorylation of NLC and FRK, but not Akt. ET-1 induced contraction and migration, but did not alter proliferation of PSCs. FT-1-induced contraction was inhibited by an ETA receptor antagonist BQ-123 and an ETB receptor antagonist BQ-788, whereas migration was inhibited by BQ-788 but not by BQ-123. A Rho kinase inhibitor Y-27632 abolished both contraction and migration. CONCLUSION： ET-1 induced contraction and migration of PSCs through El receptors and activation of Rho-Rho kinase. ETA and FTB receptors play different roles in the regulation of these cellular functions in response to ET-1.

关键词： Pancreatitis Pancreatic fibrosis Pancreatic stellate cells Endothelin-1 Rho kinase

The New Plating Process on Plastics

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料热处理学报 2004年第05B期25卷 1119-1121页

作者： Makoto Imamura Jun Okada Kazuya satoh Okuno Chemical Industries Co. Ltd JapanOkuno Chemical Industries Co. Ltd JapanOkuno Chemical Industries Co. Ltd Japan

This process does not use general electroless plating solution containing formaldehyde(carcinogen) and phosphate(the object of waste water regulation). Furthermore, we succeeded in developing a new electroless copper plating solution which is usable semi-permanently by using the special reducing agent. The electroless deposition forms a very thin conductive film on substrate. Therefore, it can prevent some appearance defects (e.g. pits, pin-holes, laminations and inclusions) that occur in the conventional ones. In addition, it is possible to eliminate electroplating of copper from the process by applying the exclusive nickel solution in electroplating. Therefore, the obtained metal parts can be recycled as high quality stainless steel. Given this copper electroplating-free process, 25 u m-thick nickel deposition at the stage of electroplating, at least, enables the metal layers to show properties as versatile as those of the conventional(its total thickness is 25 n m in the comparative conventional process).

关键词：电镀再循环调磷调氮合成树脂

A User-friendly Living Cationic Polymerization: Degenerative Chaintransfer Polymerization of Vinyl Ethers by Simply Using Mixtures of Weak and Superstrong Protonic Acids

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2019年第9期37卷 851-857页

作者： Mineto Uchiyama Masataka Sakaguchi Kotaro satoh Masami Kamigaito Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Furo-cho Chikusa-ku Nagoya University

Mixtures of a weak protonic acid and a trace amount of superstrong protonic acid were used for the simple control of the cationic polymerization of vinyl ethers via a degenerative chain-transfer mechanism, in which the former acid works as a precursor of the chain transfer agent (CTA) or the dormant species and the latter works as a source of the cationic propagating species. The addition of mixtures of phosphoric acid dibutyl ester ((n=BuO)2PO2H) or 1 -octanethiol (n-C8H17SH) and a trace amount of trifluoromethanesulfonic acid (TfOH) to a solution of isobutyl vinyl ether (IBVE) at -78℃ resulted in polymers with controlled molecular weights, which were basically determined by the feed ratio of IBVE to the weak protonic acid, and narrow molecular weight distributions (Mw/Mn≈ 1.1). These results were almost the same as those obtained using their prepared adducts of IBVE as CT As in the presence of a trace amount of TfOH under similar conditions. Methanesulfonic acid (CH3SO3H), whose adduct of IBVE has not been isolated due to instability, was similarly used in conjunction with trace TfOH to result in controlled molecular weights but slightly broader MWDs (Mw/Mn = 1.2-1.8). These results indicate that the sulfoxonium ion is also an effective intermediate in the cationic DT polymerization in addition to the phosphonium and sulfonium intermediates derived from (n=BuO)2PO2H and C8H17SH, respectively. The simple living cationic polymerization was thus achieved by using a combination of a weak protonic acid and a trace amount of TfOH, which are both easily available, low cost, free from metal, and easy to handle, without need for preparation of the initiator.

关键词： Living cationic polymerization Degenerative chain transfer RAFT polymerization Metal free Vinyl ether

MicroRNA in TLR signaling and endotoxin tolerance

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2011年第5期8卷 388-403页

作者： Md A Nahid Minoru satoh Edward KL Chan Department of Oral Biology University of FloridaGainesvilleFLUSA Division of Rheumatology and Clinical Immunology Department of Medicineand PathologyImmunologyand Laboratory MedicineUniversity of FloridaGainesvilleFLUSA

Toll-like receptors(TLRs)in innate immune cells are the prime cellular sensors for microbial *** activation leads to the production of proinflammatory mediators and thus TLR signaling must be properly regulated by various mechanisms to maintain ***4-ligand lipopolysaccharide(LPS)-induced tolerance or cross-tolerance is one such mechanism,and it plays an important role in innate *** is established and sustained by the activity of the microRNA miR-146a,which is known to target key elements of the myeloid differentiation factor 88(MyD88)signaling pathway,including IL-1 receptor-associated kinase(IRAK1),IRAK2 and tumor-necrosis factor(TNF)receptor-associated factor 6(TRAF6).In this review,we comprehensively examine the TLR signaling involved in innate immunity,with special focus on LPS-induced *** function of TLR ligand-induced microRNAs,including miR-146a,miR-155 and miR-132,in regulating inflammatory mediators,and their impact on the immune system and human diseases,are *** of these microRNAs may affect TLR pathway activation and help to develop therapeutics against inflammatory diseases.

关键词： innate immunity lipopolysaccharide LPS tolerance microRNA Toll-like receptor

Pharmacological characteristics of Kampo medicine as a mixture of constituents and ingredients

维普期刊数据库评论

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 Integrative Medicine 2013年第1期11卷 11-16页

作者： Hiroyasu satoh Health Life Science Shitennoji UniversityHabikino Osaka 583-8501 Japan

Herbal medicine in Japan is termed as Kampo medicine, which is derived from traditional Chinese medicine. Shakuyakukanzoto （Shao-Yao-Gan-Cao-Tang） as a kind of Kampo formulations is composed of just two components; Paeoniae Radix and Glycyrrhizae Radix, which produced marked relaxation of intestinal tract. Mokuboito （Mu-Fang-Ji-Tang） inhibited cardiac ionic channel currents, and as a mixture also produced great vasodilatation. Sinomenine （a main ingredient of Mokuboito） as a single compound also caused the vasodilatation, but decreased it along with ageing. Gypsum containing in Mokuboito and Chotosan （Diao-Teng-San） caused more marked effects, as compared with those without Gypsum. On the other hand, Rokumigan （Liu-Wei-Wan）, Hachimijiogan （Ba-Wei-Di-Huang-Wan） and Goshajinkigan （Niu- Che-Shen-Qi-Wan） increase in order the number of contained ingredients. The formulations with more herbs （ingredients） produced much more effective actions on rat aorta, presumably due to compensation of the decline of pharmacological sensitivity with ageing. Thus, there are some important differences between single chemical drugs and mixture drugs with many ingredients. The effects of Kampo medicine （mixture） are never just a sum of each effect induced by a lot of in qredients. For elder persons, furthermore, Kampo medicine exerts more effective actions.

关键词： Kampo medicine multiple compounds medicine, herbal anti-ageing drugs vasodilatation rats

Chemical Composition Control of Non-Metallic Inclusions in High Alloy Steel Production Process

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第S2期18卷 275-282页

作者： Naoya satoh Takahiro MIKI Mitsutaka HINO Department of Metallurgy Graduate School of Engineering Tohoku University now Yasuki Works Hitachi Metal Corporation Department of Metallurgy Graduate School of Engineering Tohoku University Professor Emeritus Tohoku University now Hokkaido Polytechnic College 3-130 Zenibako Otaru Hokkaido 047-0292 Japan

There is a close relation between the characteristics of products and the chemical composition control of inclusions in steelmaking process. Therefore, it is very important for a warranty of product’s characteristics to improve inclusion quality resulting in defective products. In the present work, the control technique of inclusions’ chemical composition is discussed thermodynamically based on the Redlich-Kister type polynomial to metallic solution and regular solution model to molten oxide solution. It is very effective for the precise chemical composition control of oxides to determine the concentration of deoxidizers based on the thermodynamic relation among dissolved deoxidizers and oxygen, because it is known that oxide inclusions are equilibrated with them in molten steel in the steel making process. High alloy steel production process was focused in the present work.

关键词： high alloy steel non-metallic inclusion deoxidation equilibrium redlich-Kister type polynomial regular solution model

Improving Representation of Tropical Cloud Overlap in GCMs Based on Cloud-Resolving Model Data

在线全文

学校读者我要写书评

暂无评论

Journal of Meteorological Research 2018年第2期32卷 233-245页

作者： Xianwen JING Hua ZHANG Masaki satoh Shuyun ZHAO Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology Nanjing 210044 China State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences Beijing 100081 China Atmosphere and Ocean Research Institute The University of Tokyo Kashiwa 2778564 Japan Laboratory for Climate Studies National Climate Center China Meteorological Administration Beijing 100081 China

The decorrelation length（Lcf） has been widely used to describe the behavior of vertical overlap of clouds in general circulation models（GCMs）; however, it has been a challenge to associate Lcf with the large-scale meteorological conditions during cloud evolution. This study explored the relationship between Lcf and the strength of atmospheric convection in the tropics based on output from a global cloud-resolving model. Lcf tends to increase with vertical velocity in the mid-troposphere（w500） at locations of ascent, but shows little or no dependency on w500 at locations of descent. A representation of Lcf as a function of vertical velocity is obtained, with a linear regression in ascending regions and a constant value in descending regions. This simple and dynamic-related representation of Lcf leads to a significant improvement in simulation of both cloud cover and radiation fields compared with traditional overlap treatments. This work presents a physically justifiable approach to depicting cloud overlap in the tropics in GCMs.

关键词： cloud overlap decorrelation length cloud-resolving model Nonhydrostatic Icosahedral Atmospheric Model(NICAM)