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Search Results: 1 - 10 of 164822 matches for " Tatiana F Ferreira "
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Optimización de la Concentración de L-Cisteína para la producción de 1,3-Propanodiol por una vía Biotecnológica
Ferreira,Tatiana F; Ribeiro,Roberta dos R; Matos,Pedro M; Coelho,Maria Alice Z;
Información tecnológica , 2013, DOI: 10.4067/S0718-07642013000100006
Abstract: glycerol was converted into 1,3-propanediol (1,3-pdo) using citrobacter freundii atcc 8090. 1,3-pdo is a bifunctional molecule that can be used in many applications, being of great commercial interest. the most recent route used for the production of this compound is through biotechnology using some micro-organisms capable of anaerobically converting glycerol into 1,3-pdo. the conversion done makes it necessary the addition of cysteine ??to the culture medium. five experiments were performed with cysteine at five concentrations to verify which is the optimum concentration that does not affect conversion of glycerol into 1,3-pdo. the concentrations used were 0.05, 0.10, 0.15, 0.20 and 0.25 gl-1. the yields were 15, 20, 26, 35 and 28 % respectively. according to the results it is concluded that the optimum cysteine concentration ??for 1,3-pdo production is 0.20 g.l-1.
Coronary fistula resembling patent ductus arteriosus
Sgarbieri, Ricardo Nilsson;Moreira Neto, Francisco F.;Vieira, Fabiano Ferreira;Barbosa, Tatiana Maia J. U.;
Revista Brasileira de Cirurgia Cardiovascular , 2003, DOI: 10.1590/S0102-76382003000400012
Abstract: a 14-year-old girl, presenting with heart failure and a continuous murmur, similar to that of a patent arterial duct, was investigated using echocardiogram and cardiac catheterization revealing a left to right shunt throught a coronary artery fistulae between the first septal branch and the right ventricular outflow tract. the patient was submitted to surgery, occluding the anomalous branch by the suturing of its orifice in the right ventricular outflow tract, under cardiopulmonary bypass. after the operation, cardiac catheterization revealed complete occlusion of the fistula without any residual shunt or compromise to the coronary circulation. in seven years of follow-up the patient is completely free of symptoms.
Optimización de la Concentración de L-Cisteína para la producción de 1,3-Propanodiol por una vía Biotecnológica Optimization of L-Cysteine Concentration to produce 1,3-Propanediol by a Biotechnological route
Tatiana F Ferreira,Roberta dos R Ribeiro,Pedro M Matos,Maria Alice Z Coelho
Información Tecnológica , 2013,
Abstract: Se ha realizado la conversión de glicerol en 1,3-propanodiol (1,3-PDO) usando la cepa Citrobacter freundii ATCC 8090. El 1,3-PDO es una molécula bifuncional que puede ser utilizada para muchas aplicaciones, siendo así de gran interés comercial. Una ruta más reciente para la producción de este compuesto es la vía biotecnológica utilizando algunos microorganismos capaces de convertir anaeróbicamente glicerol en 1,3-PDO. La conversión realizada hace necesaria la adición de cisteína al medio de cultivo. Se realizaron cinco experimentos con cinco concentraciones de cisteína con el fin de verificar cuál es la menor concentración posible que no afecta la conversión de glicerol en 1,3-PDO. Las concentraciones utilizadas fueron 0,05; 0,10; 0,15; 0,20 y 0,25 g.L-1. Los rendimientos fueron 15, 20, 26, 35 y 28 % respectivamente. De acuerdo a los resultados se concluye que la concentración óptima de cisteína para la producción de 1,3-PDO es 0,20 g.L-1. Glycerol was converted into 1,3-propanediol (1,3-PDO) using Citrobacter freundii ATCC 8090. 1,3-PDO is a bifunctional molecule that can be used in many applications, being of great commercial interest. The most recent route used for the production of this compound is through biotechnology using some micro-organisms capable of anaerobically converting glycerol into 1,3-PDO. The conversion done makes it necessary the addition of cysteine to the culture medium. Five experiments were performed with cysteine at five concentrations to verify which is the optimum concentration that does not affect conversion of glycerol into 1,3-PDO. The concentrations used were 0.05, 0.10, 0.15, 0.20 and 0.25 gL-1. The yields were 15, 20, 26, 35 and 28 % respectively. According to the results it is concluded that the optimum cysteine concentration for 1,3-PDO production is 0.20 g.L-1.
Coronary fistula resembling patent ductus arteriosus
Sgarbieri Ricardo Nilsson,Moreira Neto Francisco F.,Vieira Fabiano Ferreira,Barbosa Tatiana Maia J. U.
Revista Brasileira de Cirurgia Cardiovascular , 2003,
Abstract: A 14-year-old girl, presenting with heart failure and a continuous murmur, similar to that of a patent arterial duct, was investigated using echocardiogram and cardiac catheterization revealing a left to right shunt throught a coronary artery fistulae between the first septal branch and the right ventricular outflow tract. The patient was submitted to surgery, occluding the anomalous branch by the suturing of its orifice in the right ventricular outflow tract, under cardiopulmonary bypass. After the operation, cardiac catheterization revealed complete occlusion of the fistula without any residual shunt or compromise to the coronary circulation. In seven years of follow-up the patient is completely free of symptoms.
Morfoanatomia de Memora nodosa (Silva Manso) Miers, Bignoniaceae Morpho-anatomy of Memora nodosa (Silva Manso) Miers, Bignoniaceae
Leonice M. F. Tresvenzol,Tatiana S. Fiuza,Maria Helena Rezende,Heleno D. Ferreira
Revista Brasileira de Farmacognosia , 2010,
Abstract: Memora nodosa (Silva Manso) Miers, Bignoniaceae, é uma planta do Cerrado utilizada popularmente como cicatrizante de úlceras e feridas externas (folhas e caules). O objetivo deste trabalho foi caracterizar morfologicamente essa espécie e fazer o estudo anat mico de suas folhas. O estudo morfológico foi realizado à vista desarmada e com o auxílio de microscópio estereoscópico. Para o estudo anat mico as folhas foram seccionadas e as laminas histológicas confeccionadas de acordo com as técnicas convencionais. Memora nodosa é um arbusto com folhas opostas cruzadas, recompostas, bipinadas, imparipinadas, com foliólulos pequenos, lanceolados, verde-escuros e brilhantes. A inflorescência é racemosa com flores infundibuliformes e corola amarelo-ouro; glandulas nectaríferas s o observadas no ter o superior do cálice; androceu com quatro estames férteis, didínamos e um estaminódio reduzido; gineceu com estilete terminal, ovário súpero, assentado sobre um disco nectarífero. O fruto é do tipo cápsula septífraga achatada, com sementes aladas. Anatomicamente a lamina do foliólulo é hipoestomática com est matos predominantemente paracíticos. O parênquima pali ádico é pluriestratificado, ocupando cerca de dois ter os do mesofilo dorsiventral. Tricomas glandulares e tectores s o observados, em maior número, nas folhas jovens. Memora nodosa (Silva Manso) Miers, Bignoniaceae, is a Brazilian Savannah plant, popularly used as external wound and ulcer healing (leaves and stems). The goal of this research was to perform the morphological study of M. nodosa species and the anatomical study of its leaves. The morphological study was done to the naked eye and with the aid of a stereoscopic microscope. For the anatomical study leaves were sectioned and histological slides made in accordance with conventional techniques. Memora nodosa is a shrub with decussate leaves recomposed, bipinnate, imparipinnate with small leaflets, lanceolate, dark green and shining. The inflorescence is racemose with infundibuliform flowers and gold yellow corolla; nectar glands are observed in the upper third calyx; androecium with four fertile stamens, didynamus and one staminode; gynoecium with terminal style, superior ovary, seated on a nectary disc. The fruit is flattened septifragal capsule with winged seeds. Anatomically, the blade leaflet is hypostomatic with predominantly paracytic stomata. The palisade parenchyma is pluriseriate, occupying about two thirds of the dorsiventral mesophyll. Glandular and non-glandular trichomes are observed in greater numbers in the young leaves.
Characterization of CdTe thin films grown on glass by hot wall epitaxy
Ferreira, Sukarno Olavo;Leal, Fábio Fagundes;Faria, Tatiana Estorani de;Oliveira, José Eduardo de;Motisuke, Paulo;Abramof, Eduardo;
Brazilian Journal of Physics , 2006, DOI: 10.1590/S0103-97332006000300022
Abstract: in this work we have investigated the properties of cdte thin films grown on glass substrates by hot wall epitaxy. its most important feature is the growth at very low temperatures, which would allow the growth even on polymer substrates. our samples were grown at temperatures between 150 and 250 oc at a growth rate between 0.2 and 2 μm/h. the cdte films were characterized by x-ray diffraction, scanning electron microscopy and optical transmission. the x-ray teta-2teta scans revealed films with cubic structure and a very high degree of preferential orientation. in fact, for films thicker than 1 μm, no other reflections have been observed on the spectra besides the (111), (333) and (444). the scanning electron micrographs showed a grain size about 0.3 μm and the optical transmission indicated a very good optical quality of the interfaces, showing pronounced interference fringes.
Morfoanatomia de Memora nodosa (Silva Manso) Miers, Bignoniaceae
Tresvenzol, Leonice M. F.;Fiuza, Tatiana S.;Rezende, Maria Helena;Ferreira, Heleno D.;Bara, Maria Teresa F.;Zatta, Daniel T.;Paula, José R.;
Revista Brasileira de Farmacognosia , 2010, DOI: 10.1590/S0102-695X2011005000002
Abstract: memora nodosa (silva manso) miers, bignoniaceae, is a brazilian savannah plant, popularly used as external wound and ulcer healing (leaves and stems). the goal of this research was to perform the morphological study of m. nodosa species and the anatomical study of its leaves. the morphological study was done to the naked eye and with the aid of a stereoscopic microscope. for the anatomical study leaves were sectioned and histological slides made in accordance with conventional techniques. memora nodosa is a shrub with decussate leaves recomposed, bipinnate, imparipinnate with small leaflets, lanceolate, dark green and shining. the inflorescence is racemose with infundibuliform flowers and gold yellow corolla; nectar glands are observed in the upper third calyx; androecium with four fertile stamens, didynamus and one staminode; gynoecium with terminal style, superior ovary, seated on a nectary disc. the fruit is flattened septifragal capsule with winged seeds. anatomically, the blade leaflet is hypostomatic with predominantly paracytic stomata. the palisade parenchyma is pluriseriate, occupying about two thirds of the dorsiventral mesophyll. glandular and non-glandular trichomes are observed in greater numbers in the young leaves.
Persistência da artéria isquiática: relato de caso
Bez, Leonardo Ghizoni;Costa-Val, Ricardo;Bastianetto, Paulo;Oliveira, Tatiana Ferreira de;Avelar, Carlos Eduardo Mourad;Veloso, Denise Sena;Costa, Jovelino Pinheiro;Oliveira, Fábio Sales de;
Jornal Vascular Brasileiro , 2006, DOI: 10.1590/S1677-54492006000300014
Abstract: persistent sciatic artery is a rare congenital anomaly of the circulatory system. since there are few cases described in the literature, there is no consensus on diagnostic and treatment methods. the authors report on a 59-year-old male patient with history of progressive intermittent claudication in the right calf, associated with pulsatile mass in the popliteal fossa and absence of distal pulses. tomography angiography of the abdominal aorta and lower limbs showed persistent right sciatic artery. selective digital subtraction angiography of the sciatic artery was also performed for surgical planning. the patient was submitted to femorofibular bypass with reverse ipsilateral great saphenous vein and ligation of the sciatic artery in the pelvis using retroperitoneal approach.
Typing of avian pathogenic Escherichia coli strains by REP-PCR
Brocchi, Marcelo;Ferreira, Alessandra;Lancellotti, Marcelo;Stehling, Eliana G.;Campos, Tatiana A.;Nakazato, Gerson;Castro, Antonio F. Pestana de;Silveira, Wanderley D.;
Pesquisa Veterinária Brasileira , 2006, DOI: 10.1590/S0100-736X2006000200002
Abstract: in the present study the repetitive extragenic palindromic (rep) polymerase chain reaction (pcr) technique was used to establish the clonal variability of 49 avian escherichia coli (apec) strains isolated from different outbreak cases of septicemia (n=24), swollen head syndrome (n=14) and omphalitis (n=11). thirty commensal strains isolated from poultry with no signs of these illnesses were used as control strains. the purified dna of these strains produced electrophoretic profiles ranging from 0 to 15 bands with molecular sizes varying from 100 bp to 6.1 kb, allowing the grouping of the 79 strains into a dendrogram containing 49 rep-types. although rep-pcr showed good discriminating power it was not able to group the strains either into specific pathogenic classes or to differentiate between pathogenic and non-pathogenic strains. on the contrary, we recently demonstrated that other techniques such as eric-pcr and isoenzyme profiles are appropriate to discriminate between commensal and apec strains and also to group these strains into specific pathogenic classes. in conclusion, rep-pcr seems to be a technique neither efficient nor universal for apec strains discrimination. however, the population clonal structure obtained with the use of rep-pcr must not be ignored particularly if one takes into account that the apec pathogenic mechanisms are not completely understood yet.
Estudo das folhas e caule de Hyptidendron canum(Pohl ex Benth.) Harley, Lamiaceae
Fiuza, Tatiana S.;Rezende, Maria H.;Sabóia-Morais, Simone M. T.;Tresvenzol, Leonice M. F.;Ferreira, Heleno D.;Paula, José R.;
Revista Brasileira de Farmacognosia , 2010, DOI: 10.1590/S0102-695X2010000200010
Abstract: hyptidendron canum(pohl ex benth.) harley, lamiaceae, is popularly used as an antimalarial, anti-inflammatory, antiulcerative, antihepatotoxic and anticancer agent. the goal of this research was to perform the morphoanatomy study of h. canumleaves and stem and identify the main classes of secondary metabolites present in the of h. canumleaves. such data have not been reported in the literature. the young leaves and stems were collected in goiania (go), hand sectioned and prepared for microscope analysis. reactions were performed for the identification of secondary metabolites of the dried and pulverized material. the crude ethanol extract was prepared and then fractioned by liquid-liquid partition with hexane, chloroform and ethyl acetate. thin layer chromatography (tlc) analysis was performed on the fractions. the leaf blades presented adaxial epidermis constituted of polygonal cells with straight walls. on the abaxial epidermis cells with straight to wavy walls and diacytic and anisocytic stomates were noted. non-glandular and glandular trichomes are present on both faces of the leaf blade. the petiole is grooved, and it presents single layered adaxial and abaxial epidermis. the cross section of the stem presents a generally quadrangular contour with the presence of non-glandular and glandular trichomes. the leaf reactions and tlc evidenced the presence of flavonoids, saponins, terpenes and lignanes. this works helps to increase knowledge of the morphoanatomy and the chemical classes present in h. canum.
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