Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto
About: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto is a(n) based out in . It is known for research contribution in the topic(s): Population & Genus. The organization has 2143 authors who have published 3674 publication(s) receiving 71071 citation(s). The organization is also known as: FFCLRP & FFCLRP-USP.
Topics: Population, Genus, Catalysis, Ruthenium, Elevated plus maze
Papers published on a yearly basis
TL;DR: There has been much industrial interest in xylan and its hydrolytic enzymatic complex, as a supplement in animal feed, for the manufacture of bread, food and drinks, textiles, bleaching of cellulose pulp, ethanol and xylitol production.
Abstract: Xylan is the principal type of hemicellulose. It is a linear polymer of beta-D-xylopyranosyl units linked by (1-4) glycosidic bonds. In nature, the polysaccharide backbone may be added to 4-O-methyl-alpha-D-glucuronopyranosyl units, acetyl groups, alpha-L-arabinofuranosyl, etc., in variable proportions. An enzymatic complex is responsible for the hydrolysis of xylan, but the main enzymes involved are endo-1,4-beta-xylanase and beta-xylosidase. These enzymes are produced by fungi, bacteria, yeast, marine algae, protozoans, snails, crustaceans, insect, seeds, etc., but the principal commercial source is filamentous fungi. Recently, there has been much industrial interest in xylan and its hydrolytic enzymatic complex, as a supplement in animal feed, for the manufacture of bread, food and drinks, textiles, bleaching of cellulose pulp, ethanol and xylitol production. This review describes some properties of xylan and its metabolism, as well as the biochemical properties of xylanases and their commercial applications.
23 Jan 2006-Nature Physics
TL;DR: It is proposed that the main functional role of electrical coupling is to provide an enhancement of dynamic range, therefore allowing the coding of information spanning several orders of magnitude, which could provide a microscopic neural basis for psychophysical laws.
Abstract: A recurrent idea in the study of complex systems is that optimal information processing is to be found near phase transitions. However, this heuristic hypothesis has few (if any) concrete realizations where a standard and biologically relevant quantity is optimized at criticality. Here we give a clear example of such a phenomenon: a network of excitable elements has its sensitivity and dynamic range maximized at the critical point of a non-equilibrium phase transition. Our results are compatible with the essential role of gap junctions in olfactory glomeruli and retinal ganglionar cell output. Synchronization and global oscillations also emerge from the network dynamics. We propose that the main functional role of electrical coupling is to provide an enhancement of dynamic range, therefore allowing the coding of information spanning several orders of magnitude. The mechanism could provide a microscopic neural basis for psychophysical laws.
01 Jan 2006-Eukaryotic Cell
TL;DR: To increase the frequency of homologous recombination, the KU80 homologue in Aspergillus fumigatus was inactivated and deletion had no influence on pathogenicity in a low-dose murine infection model.
Abstract: To increase the frequency of homologous recombination, we inactivated the KU80 homologue in Aspergillus fumigatus (named akuBKU80). Homologous integration reached about 80% for both calcineurin A (calA) and polyketide synthase pksP (alb1) genes in the akuBKU80 mutant to 3 and 5%, respectively, when using a wild-type A. fumigatus strain. Deletion of akuBKU80 had no influence on pathogenicity in a low-dose murine infection model.
University of Illinois at Urbana–Champaign1, Utah State University2, University of Copenhagen3, Johns Hopkins University4, Johns Hopkins University School of Medicine5, University of Chicago6, Hobart and William Smith Colleges7, University of Utah8, United States Department of Agriculture9, Autonomous University of Barcelona10, University of Geneva11, Swiss Institute of Bioinformatics12, Queen Mary University of London13, Martin Luther University of Halle-Wittenberg14, Georgia Institute of Technology15, University of Georgia16, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto17, Sao Paulo State University18, Federal University of São Carlos19, University of São Paulo20, Agricultural Research Service21, East Carolina University22, Ohio Agricultural Research and Development Center23, University of Michigan24, University of Hohenheim25, York University26, Janelia Farm Research Campus27, Texas A&M University28, Harvard University29
TL;DR: There is no single road map to eusociality; independent evolutionary transitions in sociality have independent genetic underpinnings and these transitions do have similar general features, including an increase in constrained protein evolution accompanied by increases in the potential for gene regulation and decreases in diversity and abundance of transposable elements.
Abstract: The evolution of eusociality is one of the major transitions in evolution, but the underlying genomic changes are unknown We compared the genomes of 10 bee species that vary in social complexity, representing multiple independent transitions in social evolution, and report three major findings First, many important genes show evidence of neutral evolution as a consequence of relaxed selection with increasing social complexity Second, there is no single road map to eusociality; independent evolutionary transitions in sociality have independent genetic underpinnings Third, though clearly independent in detail, these transitions do have similar general features, including an increase in constrained protein evolution accompanied by increases in the potential for gene regulation and decreases in diversity and abundance of transposable elements Eusociality may arise through different mechanisms each time, but would likely always involve an increase in the complexity of gene networks
12 Sep 2005-FEBS Letters
TL;DR: It is shown here that silencing of vitellogenin expression causes a significant increase in JH titer and its putative receptor, which corresponds to a dynamic dose–response.
Abstract: Functionally sterile honey bee workers synthesize the yolk protein vitellogenin while performing nest tasks. The subsequent shift to foraging is linked to a reduced vitellogenin and an increased juvenile hormone (JH) titer. JH is a principal controller of vitellogenin expression and behavioral development. Yet, we show here that silencing of vitellogenin expression causes a significant increase in JH titer and its putative receptor. Mathematically, the increase corresponds to a dynamic dose-response. This role of vitellogenin in the tuning of the endocrine system is uncommon and may elucidate how an ancestral pathway of fertility regulation has been remodeled into a novel circuit controlling social behavior.
Showing all 2143 results
|Peter C. Ford||74||495||20821|
|Frederico Guilherme Graeff||60||183||12209|
|Marcus Lira Brandão||54||243||9248|
|David W. Roubik||54||177||10070|
|Richard J. Ward||53||242||9502|
|Norberto Peporine Lopes||47||457||12031|
|Rosane Marina Peralta||44||212||5701|
|Antonio Claudio Tedesco||44||307||6778|
|Roberto M. Torresi||44||213||5822|
|Zilá Luz Paulino Simões||43||113||8020|
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