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Search Results: 1 - 10 of 154773 matches for " HéCTOR; OSORIO "
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Notas e resenhas
Héctor Hernán González Osorio
Revista Paranaense de Desenvolvimento , 1994,
Abstract: Empowerment: The politics of Alternative Development, de John Friedmann. Cambridge, Blackwell Publishers, 1992, 205 p.
Notas e resenhas
Héctor Hernán González Osorio
Revista Paranaense de Desenvolvimento , 1994,
Abstract: Quest es relativas ao papel do Estado na constru o da sociedade e sua economia n o foram objeto de artigo específico neste primeiro número, raz o pela qual estas Notas e Resenhas s o dedicadas a dois assuntos dessa área: "Encontro Nacional Fuunn o Pública, Estado e Sociedade", realizado em Brasília de 25 a 29 de abril de 1994, e o livro Reinventando o Governo, de David Osborne e Ted Gaebler.
O velho e o novo na quest o social: notas sobre a importancia do planejamento
Héctor Hernán González Osorio
Revista Paranaense de Desenvolvimento , 1998,
Abstract: Uma análise das mudan as que estudos recentes apontam com rela o à natureza da quest o social do Brasil mostra que as novidades est o muito mais no "como" do que no "que" fazer. As causas dos problemas sociais do país s o amplamente conhecidas e, nesse sentido, n o há grandes novidades quanto aos conteúdos e à necessidade de interven es em dois níveis: o dos programas emergenciais de combate à miséria e o das políticas públicas de médio e longo prazo em seus diversos aspectos setoriais.
Ultrastructural Aspects of Apoptosis in Systemic Sclerosis Inflammatory Myopathy  [PDF]
Héctor J. Finol, Héctor Luis Osorio-Vega, Radharani Dorta-Ledezma, Antonio Roschman-González, Blanca Muller, Israel Montes de Oca
Microscopy Research (MR) , 2018, DOI: 10.4236/mr.2018.61001
Abstract: Muscle biopsies from two female patients with systemic sclerosis (SS) and an inflammatory myopathy were studied ultrastructurally in relation to the possible presence of apoptosis in skeletal muscle fibers. Undergoing apoptosis showed characteristic morphological features of this process, including chromatin aggregation as well as nuclear and sarcoplasmic partition into membrane bound-vacuoles (apoptotic bodies) which contained autophagosomes, mitochondria, isolated myofilaments and nuclear material. Vacuoles exhibited different diameters and were covered by single membranes, appearing beneath basement membrane. Apoptosis occurred in some fiber segments as in necrosis or included whole atrophied fibers. These results indicate that apoptosis coexists with necrosis in the inflammatory myopathy of SS.
DETERMINATION OF THE ISOSTERIC HEAT TO PLANTAIN PULP (musa paradisiaca) BY SORPTION ISOTHERMS
CIRO,HéCTOR; OSORIO,JAIRO ALEXANDER; CORTéS,ELKIN ALONSO;
DYNA , 2008,
Abstract: for sorptional data to be useful in simulation and design of storage and drying systems, they must be represented by equations valid in the conditions usually found in industrial practice. using the modified chung-pfost model and fitted by desorption the net and total isosteric heat of plantain pulp was evaluated. the net isosteric heat decreased with increasing moisture content ranging from 1670 kj/kg (5%.d.b) to 215 kj/kg (26%.d.b) where the better goodness of fit was presented by polynomial and power-law models.
DETERMINATION OF THE ISOSTERIC HEAT TO PLANTAIN PULP (musa paradisiaca) BY SORPTION ISOTHERMS
HéCTOR CIRO,JAIRO ALEXANDER OSORIO,ELKIN ALONSO CORTéS
DYNA , 2008,
Abstract: Las isotermas de sorción para ser usadas en la simulación y dise o de procesos de secado y almacenamiento de alimentos deben ser representadas por modelos válidos dentro de las condiciones encontradas en la práctica industrial. Usando el modelo de Chung-Pfost y ajustado por desorción el calor isostérico neto y totalpara pulpa de plátano fueron determinados. El calor neto isotérico neto decreció con el contenido de humedad del producto variando desde 1670 kJ/kg (5%.d.b) a 215 kJ/kg (26%.d.b) donde esta variación fue representada por el modelo potencial y polinomial.
Microbial iron management mechanisms in extremely acidic environments: comparative genomics evidence for diversity and versatility
Héctor Osorio, Verónica Martínez, Pamela A Nieto, David S Holmes, Raquel Quatrini
BMC Microbiology , 2008, DOI: 10.1186/1471-2180-8-203
Abstract: Acidithiobacilli have predicted FeoB-like Fe(II) and Nramp-like Fe(II)-Mn(II) transporters. They also have 14 different TonB dependent ferri-siderophore transporters of diverse siderophore affinity, although they do not produce classical siderophores. Instead they have predicted novel mechanisms for dicitrate synthesis and possibly also for phosphate-chelation mediated iron uptake. It is hypothesized that the unexpectedly large number and diversity of Fe(III)-uptake systems confers versatility to this group of acidophiles, especially in higher pH environments (pH 4–5) where soluble iron may not be abundant. In contrast, Leptospirilla have only a FtrI-Fet3P-like permease and three TonB dependent ferri-dicitrate siderophore systems. This paucity of iron uptake systems could reflect their obligatory occupation of extremely low pH environments where high concentrations of soluble iron may always be available and were oxidized sulfur species might not compromise iron speciation dynamics. Presence of bacterioferritin in the Acidithiobacilli, polyphosphate accumulation functions and variants of FieF-like diffusion facilitators in both Acidithiobacilli and Leptospirilla, indicate that they may remove or store iron under conditions of variable availability. In addition, the Fe(II)-oxidizing capacity of both A. ferrooxidans and Leptospirilla could itself be a way to evade iron stress imposed by readily available Fe(II) ions at low pH. Fur regulatory sites have been predicted for a number of gene clusters including iron related and non-iron related functions in both the Acidithiobacilli and Leptospirilla, laying the foundation for the future discovery of iron regulated and iron-phosphate coordinated regulatory control circuits.In silico analyses of the genomes of acidophilic bacteria are beginning to tease apart the mechanisms that mediate iron uptake and homeostasis in low pH environments. Initial models pinpoint significant differences in abundance and diversity of iron mana
Eficacia y toxicidad de los antimoniales pentavalentes (Glucantime? y Pentostam?) en un modelo animal de leishmaniasis cutánea americana: aplicación de la luminometría
Henao,Héctor Hernán; Osorio,Yaneth; Saravia,Nancy Gore; Gómez,Arlen; Travi,Bruno;
Biomédica , 2004,
Abstract: the pentavalent antimonial compounds glucantime? and pentostam? are the first line drugs used in anti- leishmania treatment. however, no in vivo studies have compared the efficacy and toxicity of these drugs where host variability has been controlled. biochemical studies of leishmania have detected differences between the two drugs with regard to dna topoisomerase i inhibition, a phenomenon that possibly impacts treatment efficacy. to evaluate the clinical efficacy, hamsters were infected intradermally in the right hind foot with 106 promastigotes of a wild type or luciferase-transfected leishmania panamensis. at three weeks post-inoculation, the animals were treated intramuscularly with either glucantime? or pentostam? (30, 60 or 120 mg sbv/kg per day for 20 days). to evaluate parasitological efficacy a luminometry assay was standardized for quantitation of amastigotes in hamster tissues. to evaluate toxicity, hamsters were treated intramuscularly with glucantime? or pentostam? (120, 160 or 240 mg sbv/kg per day for 20 days). animals inoculated with either of the parasite strains and treated with either drug, showed a similar rate of lesion reduction, as compared to untreated controls ( p<0.01). parasite burden was also comparable, and no significant differences were found in the cure rate. no renal or hepatic alterations occurred as evidenced by normal serum levels of creatinine, aspartate aminotransferase, alanine aminotransferase and amylase. hamsters treated with 120 mg sbv/kg per day for 20 days or higher doses of pentostam? showed macro- and microscopic signs of inflammation at the site of injection. these effects were absent in the animals treated with glucantime?. the results confirmed clinical observations regarding the similar efficacy of the two drugs, as well as the higher local toxicity of pentostam?.
CARACTERIZACIóN REOLóGICA Y TEXTURAL DEL QUESO EDAM
OSORIO TOBóN,JUAN FELIPE; CIRO VELáSQUEZ,HéCTOR JOSé; MEJíA,LUIS GUILLERMO;
DYNA , 2005,
Abstract: using the relaxation, creep and texture profile analysis test the rheological and textural behavior of edam cheese was obtained. the results showed that the cheese is a viscoelastic material, where the kelvin and maxwell models turned out ideal to predict the mechanical behavior of the product. also the textural parameters such as hardness, cohesiveness, adhesiveness and chewiness were obtained indicating to depend upon the maturation period but not its springiness.
INFLUENCIA DE PARáMETROS FíSICOS EN LA RESISTENCIA DE DISE?O A COMPRENSIóN DE LA GUADUA ANGUSTIFOLIA KUNTH
OSORIO S.,JAIRO ALEXANDER; CIRO V.,HéCTOR JOSé; VéLEZ R.,JUAN MANUEL;
DYNA , 2005,
Abstract: the compression load evaluated to proportionality limit in short elements of specimens of guadua angustifolia kunth was related to some physical factors such as external and internal diameter, wall thickness, apparent density, internodes number and moisture content. the specimens of guadua angustifolia kunth were subjected to compression test according to standard iso-tc 165 given by inbar (1999). the statistical results showed that to predict the behavior of the load in the proportional limit of short elements of guadua, the parameters of greater incidence are the external diameter (de) and the total thickness of the wall (e), for which a correlation with a level of confidence of 95% was obtained. a value of 27,15 mpa with a coefficient of variation of 16% was found for the compression stress evaluated to the proportional limit. moreover, an approximated model was obtained to apparent density as function of the moisture content.
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