Search results for "Strip"
showing 10 items of 415 documents
Thermal properties of the tetrahydrate series MtM(M'EDTA)2·4H2O {Mt, M, M' = Co(II), Ni(II), Zn(II)}
1992
Abstract We report on the specific heat data of the ordered bimetallic compounds CoCo(CoEDTA) 2 ·4H 2 O and CoCo(NiEDTA) 2 ·4H 2 O in the temperature range 1.5−15 K. The magnetic specific heat is analyzed from an Ising model that assumes three different magnetic sublattices exchange-coupled by two distinct magnetic interactions, as well as local anisotropies on tetrahedral Co and octahedral Ni sites.
Topological Versatility of Oxalate-Based Bimetallic One-Dimensional (1D) Compounds Associated with Ammonium Cations
2012
A new family of oxalate-bridged chains of formula (C(1))[Mn(H(2)O)(3)Cr(ox)(3)]·H(2)O (1), (C(2))(4)[Mn(2)(H(2)O)(3)ClCr(2)(ox)(6)]Cl·H(2)O·2C(2)H(6)O (2a), (C(2))(4)[Co(2)(H(2)O)(3)ClCr(2)(ox)(6)]Cl·2H(2)O·2C(2)H(6)O (2b), [Mn(C(3))(H(2)O)(2)Cr(ox)(3)]·H(2)O (3), and (C(4))(4)[Mn(H(2)O){Cr(ox)(3)}(2)]·H(2)O (4) [C(1)(+) = tetramethylammonium, C(2)(+) = 4-N,N-dimethylaminopyridinium, C(3)(+) = 1-hydroxyethyl-4-N,N-dimethylamino-pyridinium, C(4)(+) = 1-hydroxyethyl-4-(4'-dimethylamino-α-styryl)-pyridinium, ox(2-) = oxalate] have been synthesized by self-assembly of the (C(n))(3)[Cr(ox)(3)] (n = 1-4) mononuclear compound and the chloride salts of the corresponding metal(II) ions. The crystal …
Reaction of thiophene with mono- and bimetallic Ni–Co particles supported on γ-Al2O3 and HDS activities of obtained sulfides
2009
Abstract Reaction between thiophene and M/γ-Al2O3 (20 wt.%, M = Ni, Co, 2Ni–Co and 2Co–Ni) was studied by thermal gravimetric analysis (TGA) and by sulfidation in a fixed bed microreactor. The samples were prepared by incipient wetness impregnation followed by drying and reduction in hydrogen flow at 450 °C. Formation of bimetallic particles in samples containing both Ni and Co was confirmed by HRTEM with EDX analysis. The reaction with thiophene (20 or 40 mbar) was done at 360 °C in hydrogen atmosphere. TGA of the reaction with thiophene revealed that the initial rate of sulfidation drops sharply when going from Ni/γ-Al2O3 to Co/γ-Al2O3 (by a factor of 40 under used conditions). It follows…
Catalytic CO oxidation over pumice supported Pd–Ag catalysts
2001
Abstract Results on the catalytic oxidation of CO at 523 K over bimetallic Pd–Ag catalysts supported on pumice are reported and compared with those obtained from the monometallic Pd and Ag catalysts. The catalysts were prepared by organometallic precursors and were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) after different treatments with air and with hydrogen. The activity of the catalysts decreases with increasing Ag/Pd atomic ratio, the monometallic palladium exhibiting the highest activity. Furthermore, the treatment with air and with hydrogen always results in a better catalytic performance. On the basis of the structural characterization by XRD…
Visualization of Large Terrain Using Non-restricted Quadtree Triangulations
2004
This paper presents a set of new techniques oriented towards the real-time visualization of large terrains. These techniques are mainly focused on semi-regular triangulations of non-restricted quadtree terrain representations. Despite the fact that the paper shows that triangulations based on non-restricted quadtrees are as simple and efficient as those based on restricted quadtrees, the new triangulations avoid discontinuity problems among the boundaries of different patches without the need for tree balancing and extra triangles addition. Another important feature of the proposed triangulation is that it incorporates an efficient method for building triangle strips and triangle fans for t…
ChemInform Abstract: Mono(cyclopentadienyl) Complexes of the Rare-Earth Metals
2010
I. Introduction 1953II. Overview of Synthesis, Structure, and Properties 1954A. Synthetic Methods 1954B. Ligands and Structures 1955III. Halo Complexes 1956A. General 1956B. Divalent Halo Complexes 1956C. Trivalent Halo Complexes 1957IV. Chalcogenido Complexes 1958A. General 1958B. Divalent Chalcogenido Complexes 1958C. Trivalent Chalcogenido Complexes 1959V. Pnicogenido Complexes 1960A. General 1960B. Divalent Amido and Phosphido Complexes 1960C. Trivalent Pnicogenido Complexes 19611. Bis(amido) Complexes 19612. Mixed Halo and Chalcogenido Complexes 1962VI. Hydrocarbyl and Silyl Complexes 1963A. General 1963B. Divalent Complexes 19631. Metallacarbaboranes 19632. Bimetallic Naphthalene Comp…
Dryland vegetation pattern dynamics driven by inertial effects and secondary seed dispersal
2022
This manuscript tackles the study of vegetation pattern dynamics driven by inertial effects and secondary seed dispersal. To achieve this goal, an hyperbolic extension of the classical parabolic Klausmeier model of vegetation, generally used to predict the formation of banded vegetation along the slopes of semiarid environments, has been here considered together with an additional advective term mimicking the downslope motion of seeds. Linear stability analyses have been carried out to inspect the dependence of the wave instability locus on the model parameters, with particular emphasis on the role played by inertial time and seed advection speed. Moreover, periodic travelling wave solution…
Variation in somatic cell count, California mastitis test, and electrical conductivity among various fractions of ewe's milk.
1991
Abstract Variation of three estimates of udder inflammation (SCC, California mastitis test, and electrical conductivity) among the foremilk, machine milk, and hand stripping samples were studied. Foremilk and hand stripping milks were taken from each individual teat; machine milk was taken from the entire udder. For this experiment a total of 30 Manchega ewes were subjected to machine milking during the 9th wk of lactation. Samples were taken in duplicate during two milkings on consecutive mornings. Significant differences were observed in the SCC and electrical conductivity, but not in California mastitis test, between foremilk and stripping milk The stripping fraction had higher SCC (70 ±…
Walmoo klientu lojalitātes platformas pārvaldes paneļa izstrāde
2022
Kvalifikācijas darba ietvaros ir izstrādāts pārvaldes panelis “Walmoo” klientu lojalitātes platformai. Ar šīs lietotnes palīdzību var pārvaldīt platformā piereģistrētos kontus, to apmeklētājus, apskatīt platformas statistikas datus turpmākai analīzei, kā arī veidot, sūtīt un apskatīt rēķinus. Lietotne pieejama tikai vienam platformā piereģistrētam kontam, kurš ir identificēts kā platformas īpašnieks. Darba mērķis ir izstrādāt jaunu uzlabotu pārvaldes paneļa versiju jau esošajam nepabeigtajam risinājumam. Lietotne ir izstrādāta izmantojot ReactJS satvaru lietotāju saskarnēm ar programmēšanas valodu Typescript, NextJS satvaru, MUI lietotāju saskarnes bibliotēku. Kā arī lietotne ir savienota a…
Inverse-voltammetric determination of bismuth in biomaterials with computer assisted peak evaluation. part 3. Bismuth determination in wine, grapes a…
1989
The ultra trace element bismuth is regulary found in wine on an average of about 0.1 ppb. Very low bismuth contents were also determined in soil and different biomaterials. In spite of those very low quantities even speciation experiments show results, so far that about 90% of the bismuth in the grapes is water-soluble, resumably as saccharic acids. For detecting such low quantities a very sensitive method of differential pulse anodic stripping voltammetry was developped. The speciation experiments were carried out by fractional extraction.