Cation and anion disorder in HgBa2Can−1CunO2n+2+δ

Cu and C substitution for Hg in Hg-based cuprate superconductors is discussed. The large Hg Debye-Waller factor usually obtained from refinements based on diffraction data should be interpreted as an indication of carbon substitution for the Hg cations. This assumption is corroborated by HREM, powder x-ray anomalous dispersion, and powder neutron diffraction investigations.     

为分组网而优化VoP处理器

将话音业务转移到以数据为中心的分组交换网具有商业意义.降低的成本、优化的网络资源和可产生新收益来源的新业务是驱使这种转移的全部因素.     

Distribution of Σ3 misorientations in polycrystalline strontium titanate

SrTiO₃ is a potential electrolyte material for solid-oxide fuel cells due to its high ion conductivity. Grain boundaries (GBs) play an important role in bulk ion conductivity. It has been reported that the resistance of Σ3 GBs is much lower than the general GB in SrTiO₃. In order to clarify the conflicting reports on the prevalence of Σ3 GBs in SrTiO₃, grain size and GB misorientations in Nb-doped and undoped SrTiO₃ have been investigated as a function of annealing time. The observations suggest that the prevalence of both low-angle GBs and Σ3 GBs is strongly correlated to both abnormal grain growth and annealing time. In particular, the Σ3 GB population approaches that predicted by the Mackenzie random distribution when abnormal grain growth dominates.     

Construction of a set of convenient saccharomyces cerevisiae strains that are isogenic to S288C

A set of GAL2⁺ yeast strains that are isogenic to strain S288C have been constructed. They contain non-reverting mutations in genes commonly used for selection for recombinant plasmids. Strains from this collection are being used for the European Union Yeast Genome Sequencing Programme. Representative strains from this collection have been deposited with the ATCC.     

Dysphoria and social interaction: An integration of behavioral confirmation and interpersonal perspectives.

To investigate the process by which dysphoric persons are rejected by others, the authors integrated behavioral confirmation and interpersonal theories of depression. The expectations of nondysphoric perceiver participants (college students) were manipulated, such that half expected to interact with a same-sex dysphoric target and half expected to interact with a same-sex nondysphoric target. The targets' actual mood status was consistent or inconsistent with these expectations. Pre- and postinteraction impressions, as well as postinteraction acceptance of partners, were solicited from perceivers and targets (N=240). Audiotaped verbal behaviors were coded during the 1st and last 3 min of the interactions. Acceptance of targets and verbal behaviors were an interactive function of perceivers' expectancies and targets' mood status, such that dysphoric targets who were expected to be nondysphoric were the least accepted group and had the most dysfunctional interactions. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Turning configural processing upside down: Part and whole body postures.

Like faces, body postures are susceptible to an inversion effect in untrained viewers. The inversion effect may be indicative of configural processing, but what kind of configural processing is used for the recognition of body postures must be specified. The information available in the body stimulus was manipulated. The presence and magnitude of inversion effects were compared for body parts, scrambled bodies, and body halves relative to whole bodies and to corresponding conditions for faces and houses. Results suggest that configural body posture recognition relies on the structural hierarchy of body parts, not the parts themselves or a complete template match. Configural recognition of body postures based on information about the structural hierarchy of parts defines an important point on the configural processing continuum, between recognition based on first-order spatial relations and recognition based on holistic undifferentiated template matching. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

News: Resignation of science advisers ignites concern over California air plan

Government.     

News: Herbicide-resistant soybean plant sprouts opposition to transgenic seeds

Technology.     

Impact of Water Temperature on Resolving the Challenge of Assuring Disinfection While Limiting Bromate Formation

Intensive pilot studies were performed to study the impact of ozone dose (0.6 to 3.5 mg/L), pH (6.0 to 7.5), and contact time (12 to 38 min) on bromate (BrO₃) formation, for different sand-filtered water qualities from the Neuilly-sur-Marne Treatment Plant (COT = 1.3 to 2.2 mg/L, TAC = 190 to 230 mg CaCO₃, [Br^?] = 25 to 50 μg/L, and T = 5°C to 26°C). Whatever the water quality studied, the main factors influencing bromate formation were ozone dose, pH, and a cross factor between them. Bromate formation was shown to be proportional to bromide concentration, and to increase only slightly with temperature, depending on the ozone dose and the pH. As on the contrary temperature has an important impact on disinfection, especially when considering Cryptosporidium inactivation, resolving the challenge of ensuring disinfection while limiting bromate formation was shown to be quite easily achievable, at intermediate temperature, and with more stringent conditions at high temperature (because of bromate formation) or at low temperature (because of disinfection).     

Hybrid acrylic–polyimide latexes from miniemulsion polymerisation

A rigid polyimide (PI) was dissolved in acrylic monomers (methyl methacrylate, n‐butyl acrylate) as a hydrophobe to form miniemulsions stabilized by a mixture of sodium dodecyl sulfate and Triton^®, with droplets size in the range 100–300 nm, and PI concentration up to about 30% by weight, which corresponds to its limit of solubility. Upon polymerization initiated with ammonium persulfate, the particle size tends to decrease to the range 80–250 nm. From these hybrid latexes, clear yellowish films were obtained with two glass transitions: one close to that of polybutylacrylate (T_g = ?50 °C) and the second between 15 and 40 °C, depending on PI concentration. PI causes a reinforcement of the mechanical properties at room temperature. This reinforcement is enhanced through an appropriate thermal treatment. Copyright © 2004 Society of Chemical Industry