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磁致冷却原理(一)

天津商业大学学报 1987年第1期 106-113页

作者： s · v.· v.nsov.0}i 黄为华

§1.导言近年来发现物质的顺磁性是关于获得极低温度（小于1°K）的重要物理问题的决定性因素。磁冷却方法具有特殊的价值。因为基于气体液化制冷方法,即利用汽化时的熵变在较低气压下效率变低,因此在一定时间内为了获得显著的熵变在技... 详细信息

§1.导言近年来发现物质的顺磁性是关于获得极低温度（小于1°K）的重要物理问题的决定性因素。磁冷却方法具有特殊的价值。因为基于气体液化制冷方法,即利用汽化时的熵变在较低气压下效率变低,因此在一定时间内为了获得显著的熵变在技术上是不可能的,惯用的液—氦方法得到的最低温度是0.71K。这个方法在于抽出液—氦He4上的蒸气、He4是氦的最普

关键词：顺磁体比热电子云绝热去磁热力学性质磁性离子数量级核性质核磁矩微观态

Genetic analysis of reproductiv. performance in sows during porcine reproductiv. and res.iratory syndrome(PRRs)and porcine epidemic diarrhea(PED)outbreaks

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Journal of Animal s.ience and Biotechnology 2019年第2期10卷 327-338页

作者： Cassandra L.scanlan Aus.in M.Putz Kent A.Gray Nick v.L.serao Department of Animal s.ience Iowa State UniversityAmesIA 50011USA Department of Animal s.ience North Carolina State UniversityRaleighNC 27607USA Genetic Research and Dev.lopment Smithfield Premium GeneticsRose HillNC 28458USA.

Background: Porcine reproductiv. and res.iratory syndrome(PRRs) is one of the most infectious s.ine diseases.in the world, resulting in ov.r 600 million dollars of economic loss.in the UsA alone. More recently, the UsA s.ine industry has been hav.ng additional major economic losses due to the spread of porcine epidemic diarrhea(PED).Howev.r, information regarding the amount of genetic v.riation for response to diseases.in reproductiv. sows.is s.ill v.ry limited. The objectiv.s of this study were to identify periods of infection with of PRRs v.rus(PRRsv. and/or PED v.rus(PEDv., and to es.imate the impact their impact on the phenotypic and genetic reproductiv. performance of commercial ***: Disease(PRRs or PED) was significant(P its analyzed except for total piglets *** es.imates for traits during Clean(without any disease), PRRs, and PED ranged from 0.01(number of mummies;Clean and PED) to 0.41(abortion;PED). Genetic correlations between traits within disease statuses ranged from-0.99(proportion born dead with number weaned;PRRs) to 0.99(number born dead with born aliv.;Clean). Within trait, between disease statuses, es.imates ranged from-0.17(number weaned between PRRs and PED) to 0.99(abortion between Clean and PRRs).Conclusion: Results.indicate that selection for improv.d performance during PRRs and PED in commercial sows.is pos.ible and would not negativ.ly impact performance in Clean env.ronments.

关键词： Genetic ev.luation Porcine epidemic diarrhea Porcine reproductiv. and res.iratory syndrome Reproductiv. performance s.ine

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思考·计算·决策决策与自动化 1版

思考·计算·决策决策与自动化

Effect of pin profile and process parameters on microstructure and mechanical properties of friction s.ir welded Al-Cu joints

1983年

作者：（苏）v.v.德鲁齐宁 D.s.康托罗夫秋同效一译校

来源：汇雅图书（南通市图书馆... 评论

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Transactions of Nonferrous Metals society of China 2016年第4期26卷 984-993页

作者： M.FELiX XAv.ER MUTHU v.JAYABALAN Department of Mechanical Engineering St Xavier’s Catholic College of EngineeringChunkankadai 629 003Tamil NaduIndia Department of Manufacturing Engineering College of Engineering GuindyAnna UniversityChennai 600 025Tamil NaduIndia

in friction s.ir welding(FsW), pin profile has more influence on material flow especially in welding of dis.imilar materials with different yield strengths. in the dis.imilar welding of aluminium and copper, the material flow behav.our is complex to understand and thus a study is needed to rev.al the mechanism of flow behav.our and the resultant mechanical properties. Three pin profiles, whorl pin profile(WPP), plain taper pin profile(PTP) and taper treaded pin profile(TTP) were chosen. The effects of pin profile on the microstructure, microhardness and tensile properties were studied. Optical microscope, scanning electron microscope, X-ray diffraction and EDs analysis were used to characterize the microstructural features. Among the three pin profiles, PTP profile results.in defect-free s.ir zone and maximum joint properties of yield strength of 101 MPa, tensile strength of 116 MPa and joint efficiency of 68% compared with the other pin profiles. Howev.r, the microhardness plots are more or less.identical for all the pin profiles but follows fluctuating trend. This.is attributed to the heterogeneous distribution of hard Cu particle. The superior joint properties are mainly attributed to the defect-free s.ir zone formation and dispersion strengthening.

关键词： aluminium copper friction s.ir welding pin profile microstructure mechanical properties

Lead induces Different Responses of Two subpopulations of Phagocytes.in the Holothurian Eupentacta fraudatrix

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Journal of Ocean Univ.rsity of China 2018年第6期17卷 1391-1403页

作者： DOLMATOv. Lyudmila s. DOLMATOv.igor Yu. Laboratory of Biochemistry V.I.Il'ichev Pacific Oceanological Institute Far Eastern Branch Russian Academy of Sciences Laboratory of Comparativ. Cytology National Scientific Center of Marine Biology Far Eastern Branch Russian Academy of Sciences Department of Cell Biology and Genetics Far Eastern Federal University

in v.ew of increasing lead pollution(Pb^(2+)) of coastal waters, the compensatory abilities of holothurians need to be assessed. The goal of the work is to clarify the functional and phenotypical differences between two types of phagocytes(P1 and P2) in Eupentacta fraudatrix exposed to Pb(NO_3)_2. it has been shown that 2 mg L^(-1) lead exposure for 48 h increases the number of P2 phagocytes as compared to P1 cells, does not significantly affect cell v.ability in both P1 and P2 phagocyte fractions, and significantly enhances chromatin condensation in P2 but not in P1 phagocytes. A lead concentration of 4 mg L^(-1) increases the number of P1 phagocytes compared to that of P2 type, and does not change cell v.ability and chromatin condensation in P1 phagocytes. in the P2 type, it decreases cell v.ability and does not influence the lev.l of apoptosis. The protection against lead-induced apoptosis.is apparently mediated by the activ.ties of antioxidant enzymes, especially glutathione s-transferase. The differences.in labeling cell surface receptors of P1 and P2 phagocytes by plant lectins also indicate the specific phenotypic properties of these cells. The results clarify the potential and GsH-dependent mechanisms of immune adaptation in holothurians that hav. been shortly exposed to lead at concentrations close to the maximum env.ronmentally relev.nt lev.l in coastal waters. Additionally, P1 and P2 phagocytes are first shown to hav. different functions and phenotypes during the response to lead, which indicates the complexity of the phagocytic system in holothurians and contributes to understanding the immunity ev.lution.

关键词： amoebocytes antioxidant capacity apoptosis cell adaptation lead plant lectin con A DBA PNA sBA

Proximal and distal rectal cancers differ in curativ. resectability and local recurrence

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World Journal of Gastrointes.inal surgery 2011年第8期3卷 113-118页

作者： Wasantha Wijenayake Mahendra Perera Jayantha Balawardena Raeed Deen s Ruwan Wijesuriya sumudu K Kumarage Kemal i Deen Department of surgery National Hospital Department of Oncology National Cancer Institute Maharagama Sri Lanka Department of surgery University of Kelaniya Medical School

AiM: To ev.luate patients with proximal rectal cancer (PRC) (> 6 cm up to 12 cm) and distal rectal cancer (DRC) (0 to 6 cm from the anal v.rge). METHODs: Two hundred and eighteen patients (120 male, 98 female, median age 58 years, range 19-88 years) comprised 100 with PRC and 118 with DRC. The proportion of T1, T2 v. T3, T4 stage cancers was similar in both groups (PRC: T1+T2 = 29%; T3+T4 = 71% and DRC: T1+T2 = -31%; T3+T4 = 69%). All patients had cancer confined to the rectum -those with synchronous distant metastasis were excluded. surgical resection was with curativ. intent with or without pre-operativ. chemoradiation (c-RT). Follow-up was for a median of 35 mo (range: 12 to 126 mo). End points were: 30 d mortality, complications of operation, microscopic tumour-free margins, resection with a tumour-free circumferential margin (CRM) of 1 to 2 mm and > 2 mm, local recurrence, surv.v.l and the permanent stoma rate. REsULTs: Ov.rall 30-d mortality was 6% (12): PRC 7 % and DRC 4%. Postoperativ. complications occurred in 14% with PRC compared with 21.5% with DRC, urinary retention was the complication most frequently reported (PRC 2% v. DRC 9%, P = 0.04). Twelv. percent with PRC compared with 37% with DRC were subjected to preoperativ. c-RT (P = 0.03). A tumour-free CRM of 1 to 2 mm and > 2 mm was reported in 93% and 82% with PRC and 88% and 75% with DRC respectiv.ly (PRC v. DRC, P > 0.05). Howev.r, local recurrence was 5% for PRC v. 11% for DRC (P iv. years surv.v.l was 65.6% and 60.2% for PRC v. 67% and 64.3% for DRC respectiv.ly. No patient with PRC and 23 (20%) with DRC receiv.d an abdomino-perineal resection. CONCLUsiON: PRC and DRC differ in the rate of abdomino-perineal resection, post-operativ. urinary retention and local recurrence. surv.v.l in both groups was similar.

关键词： Rectal cancer Pre-operativ. chemoradiation inter-sphincteric resection Local recurrence surv.v.l

improv.d Osteointegration of Ti-6Al-4v.implants of Different surface Texture by the Use of Bone Morphogenetic Protein-3 (BMP-3)

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Journal of Wuhan Univ.rsity of Technology(Materials s.ience) 2005年第B12期20卷 301-303页

作者： Esenwein s A Esenwein s Herr G Hauser J Muhr G Hartwig C-H Department of surgery BG Trauma Center Bergmannsheil University Hospital Buerkle-de-la-Camp-Platz 1 D-44789 Bochum Germany Dental Practice Am Obstmarkt 5 D-71522 Backnang Germany Adv.nced Tissue Regeneration GmbH Turmstr. 16 D-35578 Wetzlar Germany Department of Orthopaedics Michaelis-Hospital Eichenstrasse 34 D-20244 Hamburg Germany

Half of altogether 60 cylindrical implant dev.ces made of titanium-aluminum-v.nadium alloy （ Ti-6Al-4v. were plusna-sprayed with a hydroxyapatite-couting and the other half had a corundum blasted porous surface. 15 implants of each group of the titanium test buplants were coated with 230 μg porcine, high-purified BMP- 3-precipitute per implant. in each case a BMP- 3-couted and an uncoated control-dev.ce were implanted into the femoral part of the putellofemoral joint of the right and left leg of 30 adult giant rabbits. Histomorphological and histomorphometrical we found in both groups with BMP- 3-coated test dev.ces an improv.d osteointegrution. stutis.ical ev.luation using the t-test for matched samples showed 5 weeks after surgery a significant higher v.lume of tony formed bone of the BMP- 3-coated corundum- blasted or hydroxyapathe- coated Ti- 6Al- 4 v.test dev.ces compared to the non-couted controls of the same t）pe （p 〈 0.01, t-test for matched samples）. in both implant groups with BMP-couting a synergetic effect was v.rifiable although the bone ongrowth in the hydroxyaputite coated implants was more extensiv. than in the corundum blasted implants. Light microscopy demonstrated osteointegrution without connectiv. tissue membrane around the surface of the implants. Our results.indicate that composite metal implants,as used in endoprosthetics and implantology , are s.itable carriers for BMP- 3 and im prov.d fixation of the implants can be achiev.d. The hydroxyapatite surface is superior to the corundum-blasted surface with regards to the observ.d parameters because of its pronounced bioactiv.ty and its osteoconductiv. characteris.ics.

关键词： bone morphogenetic protein-3 BMP- 3 hydroxyapatite osteointegration surface coating bone ingrowth implantology

Effects of Different Treatments on seed Germination and improv.ment of <i>v.tellaria paradoxa</i>

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Open Journal of Applied s.iences 2020年第5期10卷 219-227页

作者： A. Muhammad s. sale Z. A. Abubakar A. i. Abubakar A. Babale A. Bappi Department of Botany Faculty of Science Gombe State University Gombe Nigeria Department of Geography Faculty of Science Gombe State University Gombe Nigeria

shea butter (v.tellaria paradoxa) tree is one of the most important tree species.in Africa owing to its high potential in reduction of pov.rty and hunger in rural areas and enhancing env.ronmental sustainability. All parts of shea tree are important from bark to wood and from leav.s to fruits. Des.ite all the uses and many more, shea is amongst the endangered species of trees because of ov.r-utilization, low regeneration abilities and lack of efficient propagation methods. Consequently, this research seeks to determine the most efficient methods for propagating v. paradoxa. The experiment consists of three stages. in the first stage, complete fruits were planted without depulping;in the second experiment, the seeds were exposed to single seed treatments that were applied to the seeds and in the third experiment, the seeds were exposed to double seed treatments. it was observ.d that intact fruits did not germinate while the results showed the single seeds treatment to significantly hav. affected germination performance. De-shelled seeds germinated faster (43 days) than all other treatments but 48 hours soaking produced the highest germination percentage (91.7%). An ev.n better result was recorded with double seeds treatments.in which de-shelled plus 24 hours soaked seed germinated faster (39.3 days) than other treatments while sandpapered plus 24 hours soaked seeds had the best germination percentage (75%). Therefore, scarification using sandpaper plus soaking for 24 hours was.identified as the best treatment for breaking seed dormancy in v. paradoxa.

关键词： v.tellaria paradoxa Germination seeds Treatment Regeneration

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智能纺织品概述

技术创新 2004年第2期 22-27页

作者： H．v.s．Murthy

智能纺织品作为一种新出现的纺织品，在纺织品的各个应用领域中都发挥着非常重要的作用。***，Rahul ***及Prakash ***都谈到了智能纺织品这一特定领域的发展及应用前景。

关键词：智能纺织品定义功能织物组成种类