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1.
Replies that a close examination of R. C. Naso's (see record 1993-22647-001) commentary on E. A. Loewenstein's (see record 1992-28313-001) article on psychoanalytic life histories reveals contradictions that point to Naso's lack of a clear philosophical commitment. While Naso's statements appear to be informed by a relativistic perspective, his argument is constrained by an unarticulated positivistic viewpoint. Naso's criticism of Loewenstein's style, which he describes as metaphoric and evocative, is examined. Contrary to Naso's claim, scientific style does not possess a privileged access to psychoanalytic life history. Moreover, the meanings and affective valences of historical events are not fixed and static, as Naso implies, but contextual and dynamic. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
2.
The change in structure and adhesion strength of the interface by heating in air has been investigated for a plasma- sprayed
alumina coating on a ceramic substrate with a 50Ni- 50Cr alloy bond coating. A veined structure composed of NiO, NiCr
2O4, and NiAl2O4 oxides grew from the bond coating into cracks or pores in the top coating and the alumina substrate after heating at 1273
K for 20 h in air. The NiAl2O4 spinel may have formed by the oxidization of nickel, which subsequently reacted with the alumina coating or the substrate.
The mechanism of the penetration of the spinel oxides into the cracks or pores is not clear. The adhesion strength of the
coating is increased to about 15 MPa after heating at 1273 K for 20 h in air, compared to an as- sprayed coating strength
of only 1.5 MPa. 相似文献
3.
根据最新一期的《中国手机安全产品市场监测报告》来看,我国的移动安全规模发展飞速,这不仅说明了国内的IT圈子愈发重视移动安全的研究,也从侧面反映了安全事件堪忧的现状。而随着移动端设备承载着越来越多的数据资料,系统病毒、偷盗丢失以及密码紊乱等状况都在威胁着企业和个人的数据隐私。在本期的新鲜导购中,iWo为读者奉上安全三部曲,让你的移动生活“天下无贼”。 相似文献
4.
Zhensu Zeng Seiji Kuroda Jin Kawakita Masayuki Komatsu Hidenori Era 《Journal of Thermal Spray Technology》2010,19(1-2):128-136
The oxidation behavior of iron binary powders with addition of Si (1, 4 wt.%) and B (1, 3 wt.%) and that of a Ni-Cr based alloy powder with Si (4.3 wt.%), B (3.0 wt.%), and C (0.8 wt.%) additions during atmosphere plasma spray (APS) have been investigated. Analysis of the chemical composition and phases of oxides in the captured in-flight particles and deposited coatings was carried out. The results show that the addition of Si and B to iron effectively reduced the oxygen contents in the coatings, especially during the in-flight period at higher particles temperature. Ni-Cr based alloy powder with Si, B, and C additions reduced the oxidation of the base alloys significantly. Preferential oxidation and subsequent vaporization of Si, B, and C from the surface of the sprayed particles are believed to play a major role in controlling oxidation in the APS process. 相似文献
5.
Paola Zanetta Diletta Francesca Squarzanti Alessia di Coste Roberta Rolla Paolo Aluffi Valletti Massimiliano Garzaro Valeria DellEra Angela Amoruso Marco Pane Barbara Azzimonti 《International journal of molecular sciences》2022,23(24)
The human oral pathobionts Aggregatibacter actinomycetemcomitans, Streptococcus mitis and Streptococcus mutans, in dysbiosis-promoting conditions, lead to oral infections, which also represent a threat to human systemic health. This scenario may be worsened by antibiotic misuse, which favours multi-drug resistance, making the research on pathogen containment strategies more than crucial. Therefore, we aimed to in vitro select the most promising probiotic strains against oral pathogen growth, viability, biofilm formation, and co-aggregation capacity, employing both the viable probiotics and their cell-free supernatants (CFSs). Interestingly, we also assessed probiotic efficacy against the three-pathogen co-culture, mimicking an environment similar to that in vivo. Overall, the results showed that Lactobacillus CFSs performed better than the Bifidobacterium, highlighting Limosilactobacillus reuteri LRE11, Lacticaseibacillus rhamnosus LR04, Lacticaseibacillus casei LC04, and Limosilactobacillus fermentum LF26 as the most effective strains, opening the chance to deeper investigation of their action and CFS composition. Altogether, the methodologies presented in this study can be used for probiotic efficacy screenings, in order to better focus the research on a viable probiotic, or on its postbiotics, suitable in case of infections. 相似文献
6.
An alloy of Fe-10Cr-13P-7C was thermally sprayed by three different processes: (1) 80 kW low-pressure plasma spraying (LPPS),
(2) high-velocity oxyfuel (HVOF) spraying, and (3) 250 kW high-energy plasma spraying (HPS). The as-sprayed coating obtained
by the LPPS process was composed of an amorphous phase. In contrast, the as-sprayed coatings obtained by the HVOF and HPS
processes were a mixture of amorphous and crystalline phases. The as-sprayed coatings showed a high hardness of 700 DPN. A
very fine structure composed of ferrite, carbide, and phosphide was formed, producing a maximum hardness of greater than 1000
DPN in the LPPS coating just after crystallization on tempering. The corrosion re-sistance of the amorphous coating was superior
to a SUS316L stainless steel coating in 1N H2SO4 solution and 1N HC1 solution. Furthermore, the amorphous coating underwent neither general nor pitting corro sion in1NUCI solution and 6% FeCl3 6H2O solution containing 0.05N HCl, whereas the SUS316L stain less steel coating was attacked aggressively. 相似文献
7.
初看夏普Aquos Crystal.其整机的设计更偏向于刚毅俊雅一些.四周棱角分明的25D屏幕以干净利落的直线.一种如汤姆克鲁斯”潇洒硬汉般”的设计语言扑面而来。但是这些设计元素与其屏幕相比都显得无足轻重.无边框屏幕给人的印象太过深刻.尤其当屏幕点亮之后.那种视觉冲击力久久无法让人释怀。 相似文献
8.
Yury I. Lyakhovetsky Elena A. Shilova Boris L. Tumanskii Alexander V. Usatov Era A. Avetisyan Sergei R. Sterlin 《Fullerenes, Nanotubes and Carbon Nanostructures》2013,21(2):263-287
Abstract Both [60]- and [70]fullerene react with either the Scherer radical (perfluorodiisopropylethylmethyl, C9F19), a mixture of branched perfluorononenes (C9F18, the product of hexafluoropropene trimerization), or β-fluorosulphatotetrafluoroethyldiheptafluoroisopropylmethyl radical (C9F18OSO2F) in the ionization chamber of a mass spectrometer to give the positive parent ions of trifluoromethylation products, the reaction being accompanied by hydrogen addition. The reaction occurs at least partly on the walls of the ionization chamber, by a radical mechanism employing CF3 radicals formed from the radical reactants both thermally and under electron impact; only the latter route occurs with the perfluorononenes. 相似文献
9.
The heat treatment effect on the characteristics and tensile strength of plasma-sprayed alumina, yttria-stabilized zirconia
(YSZ), and mixtures of alumina and YSZ coatings on titanium was investigated. The as-sprayed structures of alumina and YSZ
coatings consists of a and y alumina phases, and cubic and tetragonal zirconia phases, respectively. The tensile strength
of the coatings containing a large amount of YSZ is increased from 25 to 50 MPa by heat treatment at 800 °C. The 60% YSZ-AI2O3 coating showed the highest tensile strength. The tensile strength increase of the YSZ-containing coating by heat treatment
is caused by formation of 10 to 100 nm wide microcracks. The interface adhesion strength between the heat-treated titanium
substrate and the alumina-containing coating is increased by chemical reaction at the in-terface. Thus, a heat-treated alumina
and zirconia mixture coating may be favorable in obtaining high tensile strength due to microcrack formation in the coating
and the chemical reaction at the interface.
During this work, S. Baba was a graduate student at Kyushu Institute of Technology, Sumitomo Metal Ind. Ltd., Osaka, Japan. 相似文献
10.
Characterization of plasma sprayed Fe-17Cr-38Mo-4C amorphous coatings crystallizing at extremely high temperature 总被引:5,自引:0,他引:5
A Fe-17Cr-38Mo-4C alloy powder was plasma sprayed by three processes: an 80 kW low-pressure plasma spray (LPPS), a 250 kW
high-energy plasma spray (HPS), and a 40 kW conventional plasma spray (APS). The as-sprayed coating obtained by the LPPS process
is composed of only amorphous phase. As-sprayed coatings obtained by the HPS and APS processes are a mixture of amorphous
and crystalline phases. The three as-sprayed coatings exhibit a high hardness of 1000 to 1100 DPN. The amorphous phase in
these coatings crystallizes at a high temperature of about 920 K. A very fine structure composed of hard ϰ-phase and carbides
is formed after crystallization. The hardness of the coating obtained by LPPS reaches a maximum of 1450 DPN just after crystallization
on tempering and retains a high hardness more than 1300 DPN after tempering at high temperatures of 1173 or 1273 K. The corrosion
potential of the amorphous coating is the highest among the three coatings and higher than that of a SUS316L stainless steel
coating. The anodic polarization measurements infer that the corrosion resistance of the amorphous coating is superior or
comparable to SUS316L stainless steel coating in H2SO4 solution. 相似文献