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The nature and genesis of greisen stocks at Krásno, Slavkovský les area - western Bohemia, Czech Republic
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Apical parts of a Li-F granite intrusion, preserved under gneiss cover at the southern margin of the Krudum Massif in the Slavkovský les area, contain greisen stocks locally bearing low-grade Sn-W mineralization. Greisen varieties pass downwards into leucocratic granite and feldspathite zones. The stocks are underlain at depth by the fresh Li-F alkali-feldspar granite, which is known as the Cistá Granite from outcrops at the present surface. Contacts of the rock types in stocks are not shar...
Related newspaper, magazine, and journal articles from HighBeam Research
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POLYHEDRAL MONOCARBABORANE CHEMISTRY. FUNCTIONALITY AND ISOMERISM: REACTIONS OF THE [6-Ph-nido-6-CB^sub 9^H^sub 11^]^sup -^ ANION WITH AMINOPYRIDINES NC^sub 5^H^sub 4^NH^sub 2^ TO YIELD NEUTRAL arachno AND closo TEN-VERTEX MONOCARBABORANE DERIVATIVES
Collection of Czechoslovak Chemical Communications
; Reaction of NC^sub 5^H^sub 4^-2-NH^sub 2^ with the [6-Ph-nido-6-CB^sub 9^H^sub 11sup -^ anion (1) in the presence of hydrated FeCl^sub 3^ gives [6-Ph-9-(NC^sub 5^H^sub 4^-2-NH^sub 2arachno-6-CB^sub 9^H^sub 12^] (4) and thence [1-Ph-2-(NC^sub 5^H^sub 4^-2-NH^sub 2closo-1-CB^sub 9^H^sub 8^] (5), in
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ELECTROPHILIC HALOGENATION OF nido-5,6-C^sub 2^B^sub 8^H^sub 12^
Collection of Czechoslovak Chemical Communications
; Room-temperature chlorination of the dicarbaborane nido-5,6-C^sub 2^B^sub 8^H^sub 12^ (1) with CCl^sub 4^ in the presence of anhydrous AlCl^sub 3^ yielded a mixture of 7-Cl-5,6-C^sub 2^B^sub 8^H^sub 11^ (7-Cl-1) (yield 34 4-Cl-5,6-C^sub 2^B^sub 8^H^sub 11^ (4-Cl-1) (yield 20 3-Cl-5,6-C^sub 2^B^sub
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Solid-Solid Reactions in the Ca^sub 3^(AsO^sub 4^)^sub 2^-Ca^sub 2^SiO^sub 4^-CaSO^sub 4^ Ternary System at Elevated Temperatures
Metallurgical and Materials Transactions
; Exploratory laboratory-scale tests were performed in order to identify the solid phases present in the Ca^sub 2^SiO^sub 4^-Ca^sub 3^(AsO^sub 4sub 2^ binary system and in the Ca^sub 2^SiO^sub 4^-Ca^sub 3^(AsO^sub 4^)2-CaSO^sub 4^-CaO system. A microanalysis study from slow-cooled samples suggests
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Modeling of the Solubilities of NiO/NiAl^sub 2^O^sub 4^ and FeO/FeAl^sub 2^O^sub 4^ in Cryolite Melts at 1300 K
Metallurgical and Materials Transactions
; Experiments to measure the solubilities of NiOTNiAl^sub 2^O^sub 4^ and FeO/FeAl^sub 2^O^sub 4^ were performed, and the results confirmed existing literature values. The solubilities of NiAl^sub 2^O^sub 4^ and FeAl^sub 2^O^sub 4^ in Al^sub 2^O^sub 3^-saturated cryolite melts at 1300 K were modeled
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LIGAND MIGRATION IN THE REACTION OF TITANIUM COMPLEXES WITH AlMe^sub 3^
Collection of Czechoslovak Chemical Communications
; Five different titanium compounds cis-[Ti951;^sup 2^-hbo)^sub 2^(OEt)^sub 20.5toluene (1), cis-[TiCl^sub 2951;^sup 2^-thp)^sub 2^] (2), [TiCl^sub 2^(edbp)^sub 2^] (3), [Ti^sub 2956;-OMe)^sub 2^(edbp)^sub 2^(Me)^sub 2^] (6), [Ti^sub 2956;-OMe)^sub 2^(edbp)^sub 2^(OMe)^sub 2^] (7) (Hhbo =
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Molecular Basis for the Dynamic Strength of the Integrin a^sub 4^B^sub 1^/VCAM-1 Interaction
Biophysical Journal
; ABSTRACT Intercellular adhesion mediated by integrin ?^sub 4sub 1^ and vascular cell adhesion molecule-1 (VCAM-1) plays a crucial role in both the rolling and firm attachment of leukocytes onto the vascular endothelium. Essential to the ?^sub 4sub 1^/VCAM-1 interaction is its mechanical strength
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Development of Mo(Si,Al)^sub 2^-Base Oxidation-Resistant Coating on Nb-Base Structural Materials
Metallurgical and Materials Transactions
; Mo(Si,Al)^sub 2^-base oxidation-resistant coatings for Nb-base structural materials have been studied. The coating is composed of a Mo(Si, Al)^sub 2^-base Al reservoir and Al^sub 2^O^sub 3^ interlayer to suppress interface reactions between the Al reservoir and the substrate. To develop a suitable
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Amphoteric Behavior of Alumina in Viscous Flow and Structure of CaO-SiO^sub 2^ (-MgO)-Al^sub 2^O^sub 3^ Slags
Metallurgical and Materials Transactions
; The viscosity of CaO-SiO^sub 2^ (-MgO)-Al^sub 2^O^sub 3^ slags was measured to clarify the effects of Al^sub 2^O^sub 3^ and MgO on the structure and viscous flow of molten slags at high temperatures. Furthermore, the infrared spectra of the quenched slags were analyzed to understand the structural
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Crystallization of Co^sub 100-x^Pt^sub x^B^sub 10^Si-^sub 12^ Amorphous Metallic Alloys
Metallurgical and Materials Transactions
; Alloys Of Co^sub 78-x^Pt^sub x^B^sub 10^Si^sub 12^ were produced using the melt-spin process in order to study the crystallization behavior and ensuing magnetic properties of the Co-Pt amorphous alloys as a function of the Pt content. We showed that when x > 15, well below its stoichiometric
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The Effect of Nb and W Alloying Additions to the Thermal Expansion Anisotropy and Elastic Properties of Mo^sub 5^Si^sub 3^
Metallurgical and Materials Transactions
; The directional thermal expansion and elastic properties of Mo^sub 5^Si^sub 3^, (Mo^sub 0.8^Nb^sub 0.2sub 5^Si^sub 3^, and (Mo^sub 0.85^W^sub 0.15sub 5^Si^sub 3^ have been studied as a function of temperature through the use of single crystals. Thermal expansion anisotropy was reduced by Nb and W
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