Sandwich Type Structure
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. “Half-Sandwich”/RuII Anticancer Complexes Containing Triphenylphosphine and p-Substituted Benzoic Acids
Mononuclear and binuclear RuII/arene/triphenylphosphine complexes with p-substituted benzoic acid derivatives were prepared and characterized. These monocationic complexes of type [Ru(η6-p-cymene)(PPh3)L] (L = benzoic acid (1), p-hydroxybenzoic acid (2), p-nitrobenzoic acid (3) and terephthalic acid (4)) were characterized using various techniques, such as
J. Braz. Chem. Soc.. Publicado em: 2020-11
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2. Estudo da viabilidade de produção de esponjas da liga A2011 a partir do estado semi-solido / Study of the feasibility of production of A2011 sponges from the alloy in semi-solid state
The work analyses the possibility of the production of cellular material by pressing the A2011 alloy in the thixotropic semi-solid state, into a space holder pre-form. Space holder particles used are NaCl, which are removed from the product after the forming operation, resulting the porous material. It is investigated the influence of the thixoforming temper
Publicado em: 2006
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3. Estruturas tipo sanduíche com placas de argamassa projetada / Sandwich-type structures with plates made of projected mortar
Sandwichtype elements, with plates made of projected mortar, have been used in the construction of buildings in some countries, including Brazil, showing expressive thermical, acoustical and mechanical strength characteristics. In general, the application of this kind of element have been limited to buildings, mainly used as cladding panels, with carrying
Publicado em: 2002
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4. Estudo espectroscopico da fluoresceina em poli (alcool vinilico) e poli (acetato de vinila)
Using the eletronic absorption (UV/VIS) and fluorescence emission spectroscopies, it was studied the photophysics of fluorescein in several systems: (a) aqueous solutions at different pH s, (b) protic solvents (ethanol and ethylene glycol ), (c) poly (vinyl alcohol) (PVA), (d) aprotic solvents (ethy acetate, dioxane and acetone) and (e) poly (vinyl acetate)
Publicado em: 1989
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5. The crystal structure of the signature domain of cartilage oligomeric matrix protein: implications for collagen, glycosaminoglycan and integrin binding
Cartilage oligomeric matrix protein (COMP), or thrombospondin-5 (TSP-5), is a secreted glycoprotein that is important for growth plate organization and function. Mutations in COMP cause two skeletal dysplasias, pseudoachondroplasia (PSACH) and multiple epiphyseal dysplasia (EDM1). In this study, we determined the structure of a recombinant protein that conta
The Federation of American Societies for Experimental Biology.
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6. The 3-D structure of a zinc metallo-beta-lactamase from Bacillus cereus reveals a new type of protein fold.
The 3-D structure of Bacillus cereus (569/H/9) beta-lactamase (EC 3.5.2.6), which catalyses the hydrolysis of nearly all beta-lactams, has been solved at 2.5 A resolution by the multiple isomorphous replacement method, with density modification and phase combination, from crystals of the native protein and of a specially designed mutant (T97C). The current m
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7. Structure and functional significance of mechanically unfolded fibronectin type III1 intermediates
Fibronectin (FN) forms fibrillar networks coupling cells to the extracellular matrix. The formation of FN fibrils, fibrillogenesis, is a tightly regulated process involving the exposure of cryptic binding sites in individual FN type III (FN-III) repeats presumably exposed by mechanical tension. The FN-III1 module has been previously proposed to contain such
National Academy of Sciences.
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8. Structure of a thrombospondin C-terminal fragment reveals a novel calcium core in the type 3 repeats
Thrombospondins (TSPs) are extracellular regulators of cell–matrix interactions and cell phenotype. The most highly conserved region of all TSPs are the calcium-binding type 3 (T3) repeats and the C-terminal globular domain (CTD). The crystal structure of a cell-binding TSP-1 fragment, spanning three T3 repeats and the CTD, reveals a compact assembly. The
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9. Native-like in vivo folding of a circularly permuted jellyroll protein shown by crystal structure analysis.
A jellyroll beta-sandwich protein, the Bacillus beta-glucanase H(A16-M), is used to probe the role of N-terminal peptide regions in protein folding in vivo. A gene encoding H(A16-M) is rearranged to place residues 1-58 of the protein behind a signal peptide and residues 59-214. The rearranged gene is expressed in Escherichia coli. The resultant circularly pe
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10. Evidence for a repeating cross-beta sheet structure in the adenovirus fibre.
The amino acid sequence of the adenovirus fibre protein reveals an approximately repeating motif of 15 residues. A diagonal comparison matrix established that these repeats extended from residue 43 to residue 400 of the 581 residue sequence. Assignment of secondary structure combined with model building showed that each 15-residue segment contained two short
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11. Three-dimensional structure of bovine pancreatic DNase I at 2.5 A resolution.
The three-dimensional structure of bovine pancreatic deoxyribonuclease I (DNase I) has been determined at 2.5 A resolution by X-ray diffraction from single crystals. An atomic model was fitted into the electron density using a graphics display system. DNase I is an alpha, beta-protein with two 6-stranded beta-pleated sheets packed against each other forming
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12. Forced unfolding of the fibronectin type III module reveals a tensile molecular recognition switch
The 10th type III module of fibronectin possesses a β-sandwich structure consisting of seven β-strands (A–G) that are arranged in two antiparallel sheets. It mediates cell adhesion to surfaces via its integrin binding motif, Arg78, Gly79, and Asp80 (RGD), which is placed at the apex of the loop connecting β-strands F and G. Steered molecular dynam
The National Academy of Sciences.