نتایج جستجو برای: l21
تعداد نتایج: 424 فیلتر نتایج به سال:
Reversible structural transition in monocrystalline Ni2FeGa microwires for shape-memory applications
We report on the production and characterization of Heusler-based Ni2FeGa microwires exhibiting two – way shape memory effect. The are characterized by a monocrystalline structure with strong preferred crystallographic orientation that shows [1 1 1] axis parallel to wire’s for high-temperature L21 austenite phase, while [0 7] is low-temperature monoclinic phase. Variation (and corresponding eas...
Cyclic voltammetry was used qualitatively to characterize and determine the feasibility of the oxidation and reduction of selected organic peroxides and hydroperoxides at a glassy carbon electrode. Organic peroxides were determined using reversed-phase high-performance liquid chromatography with simultaneous reductive and oxidative amperometric detection in a thin-layer dual parallel–adjacent e...
We study a major new entry in the French mobile telecommunications market, followed by introduction of fighting brands three incumbents. Using an empirical oligopoly model, we find that incumbents’ brand strategies are difficult to rationalize as unilateral best responses. Instead, their consistent with breakdown tacit semi-collusion: before entry, incumbents could successfully coordinate on re...
A rapid identification assay for Waitea circinata (anamorph: Rhizoctonia spp.) varieties zeae and circinata causing patch diseases on turfgrasses was developed based on the universally primed PCR (UP-PCR) products cross-blot hybridization. Tester isolates belonging to the two varieties of W. circinata were amplified with a single UP primer L21, which generated multiple DNA fragments for each va...
A multi-institutional, multidisciplinary project addresses optimal integration of computational design and efficient experimentation for the accelerated design and development of high performance materials using the example of Nb-based superalloys combining oxidation resistance, creep strength and ductility for aeroturbine applications operating at 1300 ̊C and above. Integrated within a systems ...
We found unprecedentedly high abundances of microbially produced CH4 in the anoxic deep waters of Lake Untersee, an oligotrophic, perennially ice-covered Antarctic freshwater lake. The maximum CH4 concentration (approaching 21.8 6 1.4 mmol L21) is one of the highest observed so far in a natural aquatic ecosystem. Although surficial lake sediments are the predominant source of CH4 in Lake Unters...
We present the first reported measurements of volatile iodocarbon production by biogenic marine aggregates. Iodomethane (CH3I), iodoethane (C2H5I), 2iodopropane (CH3CHICH3), and 1-iodopropane (CH3CH2CH2I) concentrations were determined in incubations of aggregates formed by concentrating the .53 mm fraction of the plankton during a field campaign in the Celtic Sea. All four iodocarbons increase...
In marine ecosystems, gradients of light, temperature, and nutrients occur horizontally (coastal to offshore) and vertically. The extent to which microorganisms acclimate or speciate in response to these gradients is under active investigation. Strain isolation data (e.g., site or depth), environmental DNA clone libraries, and preliminary physiology experiments have indicated that marine Synech...
Six congenic lines containing B complex recombinants R1 = B-F/B-L24, B-G23; R2 = B-F/B-L2, BG23; R3 = B-F/B-L2, B-G23; R4 = B-F/B-L2, B-G23; R5 = B-F/B-L21, B-G19; and R6R6 = B-F/B-L21, B-G23 were tested individually for antibody response against SRBC. R2, R3 and R4 arose from independent recombination events but are serologically identical. Each B complex recombinant was crossed to inbred Line...
The vast majority of organic matter in the world ocean is found in the dissolved pool. However, no evidence has been demonstrated for direct uptake of bulk dissolved organic matter (DOM) by organisms other than bacteria and some invertebrate larvae. The total organic carbon (TOC) is 10–30% higher in coral reefs than in adjacent open waters. The dissolved organic carbon (DOC) accounts for .90% o...
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