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14～(th) Congress of International Federation for Heat Treament and Surface Engineering

作者： V.Soundararajan N.Alagurmurthi k.Palaniradja department of Mechanical Engineering Pondicherry Engineering College India department of Mechanical Engineering Pondicherry Engineering College India department of Mechanical Engineering Pondicherry Engineering College India

＜正＞ Many experimental investigations reveal that it is very difficult to have a completely martensitic structure by any hardening process. Some amount of austenite is generally present in the hardened steel. This austenite existing along with martensite is normally referred as the retained austenite. The presence of retained austenite greatly reduces the mechanical properties and such steels do not develop maximum hardness even after cooling at rates higher than the critical cooling rates. Strength can be improved in hardened steels containing retained austenite by a process known as cryogenic quenching. Untransformed austenite is converted into martensite by this treatment. This conversion of retained austenite into martensite results in increased hardness, wear resistance and dimensional stability of steel. Wear can be defined as the progressive loss of materials from the operating surface of a body occurring as a result of relative motion at the surface. Hardness, load, speed, surface roughness, temperature are the major factors which influences wear. Many studies on wear indicate that increasing hardness decreases the wear of a material. With this in mind, to study the surface wear on a surface modified （Cryogenic treated） steel material an attempt has been made in this paper. In this study as a Part-ⅠHardening was carried out on carbon tool steel （AISI 1095） of different L/d ratio with conventional quenchants like purified water, aqueous solution and Hot mineral oil. As a Part -Ⅱhardening was followed by quenching was carried out as said in Part-Ⅰand the hardened specimen were quenched in liquid Nitrogen which is at sub zero condition. The specimens were tested for its microstructure, hardness and wear loss. The results were compared and analyzed. The alloying elements increases the content of retained austenite hence the material used was AISI1095 （Carbon 0.9%, Si 0.2%, Mn0.4% and the rest Iron）

关键词： AISI 1095 steel Liquid Nitrogen Quenching Cryogenic Quenching Hardening

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Reimagining large river management using the Resist-Accept-direct(RAd)framework in the Upper Mississippi River

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Ecological Processes 2023年第1期12卷 645-664页

作者： Nicole k.Ward Abigail J.Lynch Erik A.Beever Joshua Booker kristen L.Bouska Holly Embke Jeffrey N.Houser John F.kocik Joshua kocik david J.Lawrence Mary grace Lemon doug Limpinsel Madeline R.Magee Bryan M.Maitland Owen Mckenna Andrew Meier John M.Morton Jeffrey d.Muehlbauer Robert Newman devon C.Oliver Heidi M.Rantala greg g.Sass Aaron Shultz Laura M.Thompson Jennifer L.Wilkening Minnesota department of Natural Resources Lake CityMN 55041USA U.S.geological Survey National Climate Adaptation Science CenterRestonVA 22041USA U.S.geological Survey Northern Rocky Mountain Science CenterBozemanMT 59715USA department of Ecology Montana State UniversityBozemanMT 59715USA U.S.Fish and Wildlife Service National Wildlife Refuge SystemOak HarborOH 43449USA U.S.geological Survey Upper Midwest Environmental Sciences CenterLa CrosseWI 54603USA U.S.geological Survey Midwest Climate Adaptation Science CenterSt.PaulMN 55108USA NOAA NEFSC OronoME 04473USA University of Nebraska-Lincoln LincolnNE 68503USA National Park Service Climate Change Response ProgramFort CollinsCO 80525USA U.S.Fish and Wild-life Service National Wildlife Refuge SystemBloomingtonMN 55437USA Habitat Conservation division NOAAAlaska RegionAnchorageAK 99513USA Wisconsin department of Natural Resources MadisonWI 53703USA Aquatic Sciences Center Center for LimnologyUW-MadisonMadisonWI 53706USA U.S.geological Survey Northern Prairie Wildlife Research Center and Midwest Climate Adaptation Science CenterJamestownND 58401USA U.S.Army Corps of Engineers La CrescentMN 55947USA Alaska Wildlife Alliance AnchorageAK 99520USA U.S.geological Survey Alaska Cooperative Fish and Wildlife Research UnitUniversity of Alaska FairbanksFairbanksAK 99775USA University of North dakota Grand ForksND 58202USA Minnesota department of Natural Resources DuluthMN 55804USA Wisconsin department of Natural Resources Boulder JunctionWI 54512USA great Lakes Indian Fish and Wildlife Commission(gLIFWC) OdanahWI 54861USA U.S.geological Survey National Climate Adaptation Science Centerand School of Natural ResourcesUniversity of TennesseeKnoxvilleTN 37996USA U.S.Fish and Wildlife Service National Wildlife Refuge SystemFort CollinsCO 80526USA

Background Large-river decision-makers are charged with maintaining diverse ecosystem services through unprec-edented social-ecological transformations as climate change and other global stressors *** interconnected,dendritic habitats of rivers,which often demarcate jurisdictional boundaries,generate complex management ***,we explore how the Resist–Accept–direct(RAd)framework may enhance large-river management by promoting coordinated and deliberate responses to social-ecological trajectories of *** RAd frame-work identifies the full decision space of potential management approaches,wherein managers may resist change to maintain historical conditions,accept change toward different conditions,or direct change to a specified future with novel *** the Upper Mississippi River System,managers are facing social-ecological transformations from more frequent and extreme high-water *** illustrate how RAd-informed basin-,reach-,and site-scale decisions could:(1)provide cross-spatial scale framing;(2)open the entire decision space of potential management approaches;and(3)enhance coordinated inter-jurisdictional management in response to the trajectory of the Upper Mississippi River *** The RAd framework helps identify plausible long-term trajectories in different reaches(or subbasins)of the river and how the associated social-ecological transformations could be managed by altering site-scale *** reach-scale objectives may reprioritize how,where,and when site conditions could be altered to contribute to the basin goal,given the basin’s plausible trajectories of change(e.g.,by coordinating action across sites to alter habitat connectivity,diversity,and redundancy in the river mosaic).Conclusions When faced with long-term systemic transformations(e.g.,>50 years),the RAd framework helps explicitly consider whether or when the basin vision or goals may no longer be achievable,and direct options may open y

关键词： Ecosystem Management Transformation Social-ecological system Anthropocene Climate change Basin planning Cross-scale interactions

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Compression characteristics of saturated re-compacted glacial tills in Tianmo gully of Tibet, China

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Journal of Mountain Science 2019年第7期16卷 1661-1674页

作者： CHEN Lei-lei ZHOU gordon g.d MU Qing-yi CUI kahlil Fredrick SONg dong-ri key Laboratory of Mountain Hazards and Earth Surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China department of Civil Engineering Xi'an Jiaotong UniversityXi'an 710049China

glacial tills are highly compressible soils composed of loosely cemented sandy silt *** role,for instance,as initial filler materials in geo-technical projects along temperate glacier regions warrant a systematic evaluation of their compressive *** such,we carry out a series of onedimensional compression tests on re-compacted glacial till samples obtained from Tianmo gully,Tibet,with the aims of evaluating their compressive behavior under controlled initial stress *** yield stress was determined from the void ratio versus consolidation pressure(e-log)*** compression and swelling behaviors were observed during the primary and secondary compressions of the consolidation *** the compression curves,a correlation can be found between the consolidation stress and the void *** addition,we find that the compression curves of glacial tills collapse into a single curve when normalized by the compression *** experimental results in this study provide a basic understanding of the compression characteristics of the glacial tills in Tibet,China.

关键词： glacial till Compression characteristics One-dimensional consolidation tests Consolidation stress Compression curve

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STUdY ON THE TENSILE FATIgUE dAMAgE OF QUASI-ISOTROPIC COMPOSITE LAMINATES

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Acta Metallurgica Sinica(English Letters) 2003年第1期16卷 1-7页

作者： I.g.kim I.S.kim O.S.kim Yaragarrak.d.V.Prasad dept. of Aerosp. Eng. Chosun Univ. Gwangju 501-759 South Korea dept. of Mech. Eng. Mokpo Natl. Univ. Chonam 534-729 South Korea dept. of Mech. Eng. Yosu Natl. Univ. Chonnam 550-749 South Korea Sch. of Mech. and Med. Eng. Queensland Univ. of Technol. Brisbane QLD 4001 Australia

Quasi-isotropic laminates have isotropic elastic properties in all in-plane directions. Therefore, this kind of laminate is widely used for structural elements. The simplest stacking sequence of quasi-isotropic laminates is [0/-60/60]s. When the direction of applied axial load to [0/-60/60]S laminate is inclined at a 30-degree angle, we have the other quasi-isotropic laminate [30/-30/90]s under axial load. The failure mechanisms of these two laminates are, however, entirely different from each other because these two laminates have different distribution of the interlaminar stresses. It was confirmed by tensile fatigue tests that the [0/-60/60]s laminate does not show any visible fatigue damage, but the [30/-30/90]s laminate develops edge-delamination during cyclic loading. The analytical results were in good agreement with the experimental results.

关键词： composite material delamination fatigue fracture mechanics interlaminar stress

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Pharmacokinetic,Physicochemical and Medicinal Properties of N-glycoside Anti-cancer Agent More Potent than 2-deoxy-d-glucose in Lung Cancer Cells

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Journal of Pharmacy and Pharmacology 2019年第4期7卷 165-176页

作者： Fidelis Toloyi Ndombera geoffrey k.k.Maiyoh Vivian C.Tuei Covance Laboratories Inc.BioPharm CMC solutions Greenfield46140IndianaUSA Chemistry department Wayne State UniversityDetroit48201MichiganUSA department of Medical Biochemistry School of MedicineMoi University30100EldoretKenya Johannesburg Institute for Advanced Study An initiative of the University of Johannesburg and Nanyang Technological UniversitySingapore1 Tolip StreetWestdene 2092P.O Box 524Auckland Park 2006JohannesburgSouth Africa department of Chemistry and Biochemistry School of ScienceUniversity of Eldoret30100EldoretKenya

Acetylated N-xyloside of 1-naphthylamine(k8A)has been shown to be more potent than 2-deoxy-d-glucose in lung cancer cells and has therapeutic potential for further drug *** this paper we evaluate and report cytotoxicity,pharmacokinetic,physicochemical and medicinal properties of this d-Xylose derivative(k8A)as a lead anticancer agent with greater therapeutic potential than 2-deoxy-d-glucose(2-dg).2-dg has been in clinical trials for treatment of solid tumors and other types of *** demonstrate using virtual tools that k8A has better“drug-likeness”than 2-dg and does not violate any Lipinski,ghose,Veber,Egan or Muegge *** the other hand,2-dg violates ghose and Muegge rules.A“BOILEdegg evaluation”,predicts that k8A has higher gastrointestinal absorption(HIA)than 2-dg and is not effluxed by P-glycoprotein(P-gp).Additionally,k8A does not penetrate the blood brain barrier(BBB)and is not a substrate of most Cytochrome P450(CYP)***,k8A did not show false positive alert from PAINS screening enabling us to narrow down and rule out false ***,k8A is more potent than 2-dg in H1299 and A549 lung cancer cells.

关键词： Anticancer agent N-glycoside 2-deoxy-d-glucose pharmacokinetics lung cancer

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皮肤科激光疗法的新进展

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德国医学 1999年第4期16卷 236-240页

作者： S.Hellwig d.Petzoldt k.knig Ch.Raulin 陈兴平 Universitts-Hautklinik Heidelberg Germany 同济医科大学附属同济医院

近几年来由于新的激光系统的出现使得激光疗法在皮肤科的适应证扩大了,且疗效有了显著改善。对于鲜红斑痣,特别是儿童期很多病例都能治愈,且愈后不留瘢痕。对于纹身和强行植入皮肤的污物以及一些良性色素性皮肤病变的治疗也很少副作用,... 详细信息

近几年来由于新的激光系统的出现使得激光疗法在皮肤科的适应证扩大了,且疗效有了显著改善。对于鲜红斑痣,特别是儿童期很多病例都能治愈,且愈后不留瘢痕。对于纹身和强行植入皮肤的污物以及一些良性色素性皮肤病变的治疗也很少副作用,对于表浅的面部细小皱纹及痤疮瘢痕的治疗也有可供选择的激光系统。激光因其激光介质(作用介质)的不同可分为:气体激光、固体激光、染料激光(激光染料大多为液体)、自由电子激光和化学激光。

关键词：皮肤病激光疗法脉冲染料激光氩激光

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Properties of carbon nanotube-dispersed Sr-hydroxyapatite injectable material for bone defects

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Regenerative Biomaterials 2016年第1期3卷 13-23页

作者： M.g.Raucci M.Alvarez-Perez d.giugliano S.Zeppetelli L.Ambrosio Institute of Polymers Composites and BiomaterialsNational Research Council of ItalyMostra D’oltremare Pad.20-Viale Kennedy 54Naples 80125Italy Tissue Bioengineering Laboratory DEPeIFaculty of DentistryNational Autonomous University of MexicoMexico DF 04510Mexico department of Chemical Sciences and Materials Technology National Research Council of Italy(DSCTM-CNR)P.Le Aldo Moro 7Rome 00185Italy

This study concerns the synthesis of gel materials based on carbon nanotubes dispersed strontium-modified hydroxyapatite(Sr-HA)at different compositions obtained by sol–gel technology and their influence on human-bone-marrow-derived mesenchymal stem ***,an evaluation of the influence of nanotubes and Strontium on physico-chemical,morphological,rheological and biological properties of hydroxyapatite gel was also *** analysis(scanning electron microscopy)shows a homogeneous distribution of modified nanotubes in the ceramic matrix improving the bioactive properties of *** biological investigations proved that Sr-HA/carbon nanotube gel containing 0–20 mol(%)of Sr showed no toxic effect and promote the expression of early and late markers of osteogenic differentiation in cell culture performed in basal medium without osteogenic ***,the SrHA/carbon nanotube gels could have a good potential application as filler in bone repair and regeneration and may be used in the osteoporotic disease treatment.

关键词： nanobiomaterials sol-gel tecnology biomaterial-cell interaction bioceramics bone tissue engineering

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一种离子交换和电化学的联合技术

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湿法冶金 1983年第3期 38-44页

作者： g.M.Roberts,J.d.Nolan,k.A.korinek,L.A.knerr,陈儒庆 diamond Shamrock 公司 dia-Prosim有限公司 diamond Shamrock 公司 diamond Shamrock 公司日内瓦瑞士庞蒂克龙格拉摩根联合王国彭茨维尔俄亥俄美国彭茨维尔俄亥俄美国

引言尽管本标题所包括的内容十分广泛,但本文仅介绍离子交换和电化学之间搭界的一个方面,即采用阳离子交换树脂与电化学槽结合回收金属的应用。其它方面,如离子交换膜及其对化学发展的影响一般不属于本文讨论范围。

关键词：离子交换再生剂电积树脂阳离子交换反应正离子离子交换树脂离子交换膜电化学

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贮存温度和时间对真空包装干腌火腿片的质量影响

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肉类工业 1989年第2期 32-36,48页

作者： J.d.kEMP B.E.LANgLOIS k.AkERS W.J.MEANS d.k.AARON 周振远杭州肉联厂

引言生产火腿采用三种方法腌制和成熟。两种方法采用硝酸盐和亚硝酸盐,成熟时间的长和短受温度控制;一种方法不使用亚硝酸盐和硝酸盐,而采用周围的成熟温度。火腿切片经真空包装贮存在0℃、10℃、或21℃八周。每周测定自膜,风味,需氧菌... 详细信息

引言生产火腿采用三种方法腌制和成熟。两种方法采用硝酸盐和亚硝酸盐,成熟时间的长和短受温度控制;一种方法不使用亚硝酸盐和硝酸盐,而采用周围的成熟温度。火腿切片经真空包装贮存在0℃、10℃、或21℃八周。每周测定自膜,风味,需氧菌、葡萄球菌、乳酸菌、酵母、霉菌菌落数。

关键词：火腿贮存温度贮存时间质量

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Computer image analysis of intramuscular adipocytes and marbling in the longissimus muscle of cattle

Computer image analysis of intramuscular adipocytes and marb...

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全国动物生理生化第十次学术交流会

作者： E.Albrecht k.Ender J.Wegner Research Institute for the Biology of Farm Animals D-18196 DummerstorfGermany

The deposition of fat in muscle,recognized by the consumer as marbling, is an important meat quality *** objective of the study was to provide additional insights into the quantitative extent of marbling by means of c...

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