1,721,437 research outputs found
Structural Biology : in search for new antiviral drugs
No full textUna lezione sul drug discovery basato sulle applicazioni della biologia strutturale al mondo delle proteine. Realizzato nel contesto del progetto inter-universitario europeo e-LERU
The structure of Trehalose-6-phosphatase from Burkholderia pseudomallei
No full textIl file .pdb può essere aperto con i seguenti programmi: Pymol, coot, word o textedit
The crystal structure of Burkholderia pseudomallei antigen and type I fimbria protein BPSL1626
No full textIl file .pdb può essere aperto con i seguenti programmi: Pymol, coot, word o textedit
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
One hundred years of X-ray diffraction, 50 years of structural biology
No full textSince the pioneering diffraction experiments led by Max von Laue in 1912, X-ray crystallography has progressed with a spectacular pace, opening research, and application perspectives in fields such as materials science, chemistry, mineralogy, environmental sciences, biotechnology and biomedicine. Such developments have been supported by discoveries in both the theoretical and experimental branches of science that granted the different communities access to specific investigation tools. In the biological field the highest challenge presented to X-ray crystallography has been linked to the study of proteins and nucleic acids, i.e., macromolecular structures composed of thousands of atoms, often available for the analyses in microscopic crystals of low intrinsic order. To support the development of macromolecular crystallography several complementary techniques had to be devised, such as methods in biochemistry and molecular biology, but also progresses in synchrotron X-ray sources. As the contemporary crystallographic methods allow facing very complex protein structures, in relatively short response times, the interest of corporate research for applied crystallography has grown substantially in the last two decades. In particular, current approaches to drug discovery and optimization rely on rational principles that stem from crystallographic investigations on protein/lead complexes, and on cyclic optimization of their chemical synthesis. Notably, the United Nations declared 2014 the International Year of Crystallography in consideration of the fundamental role played by crystallography for the growth of scientific knowledge
The three-dimensional structure of beta2 microglobulin : results from X-ray crystallography
No full textbeta2-microglobulin, the light chain component of the major histocompatibility complex I, is involved in the development of DRA, an amyloid deposition disease occurring in man. Specifically, the beta2-microglobulin component, dissociated form the complex heavy chain, gives rise to amyloidogenic deposits in the joints of patients exposed to long dialysis periods. beta2-microglobulin three-dimensional structure is based on an antiparallel beta-barrel fold, with immunoglobulin domain topology, displaying structural flexibility in the crystal and NMR structures so fare determined. The structural bases of amyloidogenic potential in beta2-microglobulin can be related to local unfolding, to the tendency to aggregate laterally through non-compensated beta-strands, and partly also to its trend towards N-terminal proteolytic degradation. Such trends emerge quite clearly from inspection of a limited number of crystal structures of beta2-microglobulin as an isolated chain, separated form the major histocompatibility complex I heavy chain
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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