检索结果-南通市图书馆

Electric Potential in Surface Produced Negative Ion Source with Magnetic Field Increasing Toward a Wall

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2013年第3期15卷 266-270页

作者： Azusa fukano Akiyoshi HATAYAMA Monozukuri Department Tokyo Metropolitan College of Industrial Technology Faculty of Science and Technology Keio University

Electric potential near a wall for plasma with the surface produced negative ions with magnetic field increasing toward a wall is investigated analytically. The potential profile is derived analytically by using a plasma-sheath equation, where negative ions produced on the plasma grid （PG） surface are considered in addition to positive ions and electrons. The potential profile depends on the amount and the temperature of the surface produced negative ions and the profile of the magnetic field. The negative potential peak is formed in the sheath region near the PG surface for the case of strong surface production of negative ions or low temperature negative ions. As the increase rate of the magnetic field near the wall becomes large, the negative potential peak becomes small.

关键词： negative ion source surface produced negative ion sheath potential cusp magnetic field electric potential plasma-sheath equation extraction region

Channel Attention GAN-Based Synthetic Weed Generation for Precise Weed Identification

在线全文

学校读者我要写书评

暂无评论

Plant Phenomics 2024年第2期6卷 257-268页

作者： Tang Li Motoaki Asai Yoichiro Kato Yuya fukano Wei Guo Graduate School of Agricultural and Life Sciences The University of TokyoTokyo 188-0002Japan Institute for Plant Protection National Agriculture and Food Research OrganizationFukushima 960-2156Japan Graduate School of Horticulture Chiba UniversityChiba 271-0092Japan

Weed is a major biological factor causing declines in crop ***,widespread herbicide application and indiscriminate weeding with soil disturbance are of great concern because of their environmental ***-specific weed management(SSWM)refers to a weed management strategy for digital agriculture that results in low energy *** learning is crucial for developing SSWM,as it distinguishes crops from weeds and identifies weed ***,this technique requires substantial annotated data,which necessitates expertise in weed science and agronomy.

关键词： identification attention generation channel gan-based precise synthetic weed

Geographic expansion of the cabbage butterfly （Pieris rapae） and the evolution of highly UV-reflecting females

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2012年第2期19卷 239-246页

作者： Yuya fukano Toshiyuki Satoh Tadao Hirota Yudai Nishide Yoshiaki Obara Behavioural Biology Department of Animal Life Science Tokyo University of Agriculture and Technology Fuchu Tokyo Department of Biology Faculty of Science Yamagata University Kojirakawa-machi 1-4-2 Yamagata Japan

Reflection of ultraviolet （UV） light by the wings of the female Eurasian cabbage butterfly, Pieris rapae, shows a large geographic variation. The wings of the female of the European subspecies, P. rapae rapae, reflect little UV light, while butterflies of the Asian subspecies, P. rapae crucivora, may reflect it strongly or at only intermediate levels. The geographic region where P. rapae originated remains to be determined, Moreover, it is not clear if females with wings that reflect little UV light are ancestral to females with wings that reflect UV strongly or vice versa. In the present study, we aimed to determine the geographic origin and ancestral UV pattern of cabbage butterflies through mitochondrial DNA （mtDNA） sequence analysis and amplified fragment length polymorphism （AFLP） analysis. The results of these investigations suggest that P. rapae is of European origin and that it has expanded its distribution eastward to Asia. It follows that the ancestral subspecies is the type with UV-absorbing wings. Lower nucleotide diversities and haplotype network patterns ofmtDNA derived from East Asian populations suggest that population expansion from Europe to East Asia probably occurred fairly recently and at a rapid rate.

关键词： dispersal geographical origin geographical variation UV reflection

Involvement of gonadal soma-derived factor in the reproduction of teleosts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aquaculture and Fisheries 2024年第3期9卷 417-421页

作者： tohru Kobayashi Laboratory of Molecular Reproductive Biology Institute for Environmental SciencesUniversity of ShizuokaShizuoka422-8526Japan Graduate School of Pharmaceutical and Nutritional Sciences University of ShizuokaShizuoka422-8526Japan

Gonadal soma-derived factor(Gsdf)is a member of the transforming growth factor beta(TGF-β)superfamily and a teleost-specific *** studies suggested that Gsdf promotes spermatogonial proliferation;however recent reports have shed light on its role in sex differentiation based on expression profiles and gain-and loss-of-function *** paper discusses the involvement of Gsdf in gonadal sex differentiation and sex changes in teleosts.

关键词： Teleosts Medaka Gsdf Sex determination Sex differentiation Sex change Pituitary

Catalytic Conversion of Methanol by Oxidative Dehydrogenation

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 Natural Gas Chemistry 2007年第1期16卷 1-5页

作者： Toshihito Ohtake tohru Mori Yutaka Morikawa Department of Electronic Chemistry Interdisciplinary Graduate School of Science and EngineeringTokyo Institute of Technology4259 NagatsutaMidori-kuYokohama 226-8502 Japan

This study investigates the effects of addition of oxygen on the oxidative dehydrogenation （ODH） of methanol when a fluorotetrasilicic mica ion-exchanged with palladium （Pd2^＋-TSM） was used as the catalyst. The reaction proceeded at a very low temperature in the presence of oxygen, and HCOOCH3 was obtained at high selectivity. By calculating the equilibrium conversion, it has been shown that substantial ODH took place for HCOOCH3 production. Consequently, this reaction would make dehydrogenation the dominant reaction at equilibrium. Not all the H dissociated from CH3OH was converted to H20 by oxidation. It has been shown that the H2O was not produced from oxidative dehydrogenation by the direct reaction of CH3OH and O2 when an attempt was made to carry out oxidative dehydrogenation using an isotope oxygen trace method in the gas phase. Therefore, when CHaOH was converted to CO2 and dehydrogenated to HCOOCH3, the C-O bonds were not dissociated.

关键词： C1 chemistry conversion methanol oxidative dehydrogenation catalysis

Clinical significance of molecular diagnosis for gastric cancer lymph node micrometastasis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第38期20卷 13728-13733页

作者： Hiromichi Sonoda tohru Tani Department of Surgery Shiga University of Medical Science

Advances in molecular diagnostic tools have allowed the identification of lymph node micrometastasis(LNM),including isolated tumor cells,in cancer patients. While immunohistochemistry and reverse transcription-polymerase chain reaction have been used to identify LNM in patients with gastric cancer,the clinical significance of this finding remains unclear. Recently,minimally invasive treatments,such as endoscopic submucosal dissection and laparoscopic surgery,are widely performed to help improve postsurgical quality of life(QOL). However,it is important to maintain the balance between QOL and curability when making treatments decision for patients with gastric cancer. If minimally invasive surgery based on accurate intraoperative LNM diagnosis was established,it could be performed safely. Therefore,we reviewed the clinical significance of LNM detected by molecular techniques as an important target for treatment decision making with gastric cancer patients.

关键词： Gastric cancer Lymph node micrometastasis Molecular technique Sentinel lymph node Minimally invasive surgery

Dysfunction of axonal transport in normal-tension glaucoma:a biomarker of disease progression and a potential therapeutic target

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2021年第3期16卷 506-507页

作者： Kazuyuki Hirooka tohru Yamamoto Yoshiaki Kiuchi Department of Ophthalmology and Visual Science Graduate School of Biomedical SciencesHiroshima UniversityHiroshimaJapan Department of Molecular Neurobiology Kagawa University Faculty of MedicineKagawaJapan

Glaucoma and dysfunction of axonal transport:One of the leading causes of irreversible blindness worldwide is glaucoma,with increased intraocula r pressu re(IOP)being the most common risk ***,in some glaucoma patients it has been shown that the IOP does not differ from that of the normal *** Japan,normal-tension glaucoma(NTG),which accounts for 92%of primary open-angle glaucoma,has been shown to be more frequent in the population.

关键词： glaucoma axonal transport

Structure Analysis and Ion Abundance in CID- MS- MS Spectra of Isomeric Oligosaccharides Using Quadrupole Time - of- flight Mass Spectrometry: Distinguishing between Isomeric Oligosaccharides

在线全文

学校读者我要写书评

暂无评论

分析测试学报 2001年第Z1期20卷 59-60页

作者： tohru YAMAGAKI Department of Chemistry School of Science The University of Tokyo and CREST Japan Science and Technology Corporation (JST) Hongo Bunkyo- ku Tokyo 113-0033 Japan

N - Linked oligosaccharide were analyzed by using electrospray ionization (ESI) quadrupole time - of- fight mass spectrometry(Q - Tof MS).The isomers showed the same MS and collisioninduced desociation(CID) MS - MS spectra in the m/z values because the sequence of the sugar residues was the *** the relative ion abundance of the specific fragment ion was greatly different between the ***, the isomeric oligosacchariedes were distinguished by using the ion abundance in their CID -MS - MS *** the ion abundance in accurate level, quantitative analysis of the mixtures of isomers were also performed.……

关键词： flight Mass Spectrometry electrospray ionization MS spectra mass spectrometry sequence of

Different characteristics of 40 kinds of free amino acids and 5-amino levulinic acid between wines and sakes(Japanese rice wines)

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 Future Foods 2024年第4期4卷 361-368页

作者： tohru Kimura Laboratory of Animal Science Joint Faculty of Veterinary MedicineYamaguchi UniversityYamaguchi 753-8515Japan

Based on a systemic analysis for the globa1 burden of disease study from 1990 to 2016,the Global Burden of Diseases(GBD)2016 Alcohol Collaborators reported that alcohol use was a 1eading nisk factor for globa1 disease burden and caused substantial health ***,alcoholic dnink(wines and sakes)contains abundant nutrients,particularly fermentable amino acids denived from grapes and *** acid nutrition and metabolism is strongly associated with health and preventiom against various *** purpose of this study was to elucidate 40 kinds of free amino acid(FAA)profles in wines and *** addition,the present study also provided the contents of 5-aminolevulinic acid(5-AI A)involved in the vital functionality of *** were detected and analyzed by use of an automatic amino acid *** amino acid,branched chain amino acid and Fischer ratio were calculated for each ***1 FAAs showed significant differences between wines and *** abundantly contained almost all FAAs whereas wines had just a lttle content in some *** were rich in arginine,glycine,alanine,valine,glutamic acid and leucine,while wines were remarkably nich in proline(Pro).Wines showed increased FAA levels in 6 kinds of variables(4-hydroxyproline,3-methy1 histidine,B-alanine,a-aminobutyric acid,Pro and a.-aminoadipic acid).In functionally characteristic FAAs,both wines and sakes were considerably abundant in y aminobutynic acid and 5-AI A The total amount of aromatic amino acid and branched chain amino acid were markedly higher in sakes than in *** results revealed that there were the apparent different characteristics in FAA profiles between wines and *** difference resulted from fermentation process in wines(single fermentation)and sakes(paralle1 double fermentation).Forty kinds of FAA profiles are more usefu1 in investigating characteristics of the taste of wines and *** future,detailed FAA analysis has the potential to fi

关键词： Fermentation 5-Amino levulinic acid Free anino acids γ-Aminobutyric acid Sake Wine