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Search Results: 1 - 10 of 14907 matches for " Ivan Pinto "
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Guy Debord: arte, espectaculo, sociedad
Ivan Pinto
Bifurcaciones , 2005,
Abstract: Ivan Pinto analiza la vida y obra del fundador de la Internacional Situacionista Guy Debord, y su importancia para el pensamiento urbano contemporaneo.
Gas Exchange and Production of Photosynthetic Pigments of Piper aduncum L. Grown at Different Irradiances  [PDF]
Fernanda Ventorim Pacheco, Helbert Rezende de Oliveira Silveira, Amauri Alves Alvarenga, Ivan Caldeira Almeida Alvarenga, José Eduardo Brasil Pereira Pinto, Jean Marcel Sousa Lira
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.412A3014

The species Piper aduncum is a plant with great economic potential, because the essential oil has antimicrobial activity and insecticides. Thus, as the light directly affects photosynthesis process, the present study evaluated the gas exchanges variables and photosynthetic pigments production of P. aduncum grown under different irradiances. Treatments consisted in environments with 100%, 70% and 50% of irradiance and environments with colored nets (red and blue). After 150 days of culture, photosynthetic activity (A), stomatal conductance (gs) transpiration rate (E), internal CO2 concentration (Ci), deficit vapor pressure (DVP), leaf temperature, concentration of internal/external CO2 (Ci/Ca), carboxylation efficiency (A/Ci) and efficiency water use (A/E) were evaluated. Pigments chlorophyll a, b, carotenoids, total and chlorophyll a

Optimization of the Protocol for the in Vitro Cultivation of Piper aduncum L.  [PDF]
Samia Torres Silva, Fernanda Ventorim Pacheco, Ivan Caldeira Almeida Alvarenga, José Eduardo Brasil Pereira Pinto, Suzan Kelly Vilela Bertolucci, Cibelly Pereira Ferreira
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.523363
Piper aduncum L. (Piperaceae) has great potential for economic exploration because of the proven use of its essential oil in the agriculture and in the human health. A technique that improves its propagation, as the tissue culture, becomes necessary. Some parameters must be determined for the successful cultivation in vitro. Thus, this study aimed to determine the salts concentration of MS medium, temperature, luminosity and light quality for in vitro culture of this species. The following treatments were conducted: 1/4MS, 1/2MS, MS and 2MS; 20, 25, 30 and 35; monochromatic blue, red and white lights and the combination of red and blue, using light emitting diodes (LEDs); luminosities of 17, 37, 48 and 73 μmol·m-2·s-1 obtained with cool white fluorescent lamp. After 35 days, the treatments were analyzed. To determine the salts concentration of MS, the variables were evaluated: number of shoots, leaves and roots, length and width of leaves, length and dry mass of root and shoots and percentage of death by necrosis. To the plantlets under different temperatures, length and dry mass of shoot and root, number of shoots, number, length and width of leaves and survival and rooting percentages were measured. The plantlets that were maintained under different luminosities were evaluated for length of shoot and root, dry mass of leaf and root. To evaluate the growth under the LEDs, the length and dry mass of shoot and root, number of shoots and roots, percentage of rooting and sprouting were assessed. The medium 1/4MS and the medium 1/2MS showed better responses for number and length of root, leaf width and shoot length. The temperature 25 provided the highest number of leaves, length of shoot and root, root dry mass and rooting percentage. The luminosity 73 μmol·m-2·s-1 provided higher values in length of root and dry mass of leaf and root. The red LED provided plantlets with greater growth. Thus, for the in vitro cultivation of Piper aduncum, 1/4MS, environment temperature of 25, light intensity of 73
Isolated splenic metastasis from lung squamous cell carcinoma
Andre R Dias, Rodrigo A Pinto, Juliana N Ravanini, Renato M Lupinacci, Ivan Cecconello, Ulysses Ribeiro
World Journal of Surgical Oncology , 2012, DOI: 10.1186/1477-7819-10-24
Abstract: Isolated splenic metastasis from lung cancer is an exceedingly rare event. Here, we present the case of an 82-year-old male with previously excised lung squamous cell carcinoma who developed local recurrence and a splenic metastasis. This is only the 17th known report of isolated splenic metastasis, including English and non-English literature.In April 2006, an 82-year-old former smoker male was investigated due to persistent cough. A Computed Tomographic (CT) scan of the chest showed a 2.2 × 1.5 cm nodule in the right mid-lung. Bronchoscopic biopsies revealed a moderately differentiated Squamous cell carcinoma (Figure 1). Preoperative investigation showed no mediastinal lymphadenopathy or distant metastatic disease.The patient underwent a right bilobectomy confirming a moderately differentiated squamous cell carcinoma with large polygonal cells, keratinization, intercellular bridges and keratin pearls (pT2pN2). As margins were scanty, adjuvant chemo-radiation was indicated (4 cycles of Carboplatin and Paclitaxel and 50 Gy). Patient remained asymptomatic and sixteen months after surgery a CT scan revealed a 1 × 1 cm cystic lesion in the spleen (Figure 2). Follow-up was lost and a new CT scan was only performed one year later. This exam revealed an interlobular thickening and an enlargement of the splenic lesion now measuring 6.5 × 6.4 cm (Figure 2). The patient was then referred to palliative chemotherapy with Gemcitabine and received 4 cycles (3 of them with reduced dose due to mielotoxicity). A new CT scan showed stability of the pulmonary disease but progress of the splenic lesion (7.8 × 7.8 cm - Figure 2). Splenectomy was then indicated. During preoperative period the patient presented an acute bowel obstruction. A CT scan of the abdomen and pelvis showed an abrupt obstrutive point at the level of the left colon and the patient underwent an urgent laparotomy. Surgical findings consisted of the large splenic lesion without invasion of adjacent structures and a le
Associa??es entre ingest?o energética, proteica e de fósforo em pacientes portadores de doen?a renal cr?nica em tratamento hemodialítico
Pinto, Denise Entrudo;Ullmann, Laura Sulzbach;Burmeister, Mariana Marroni;Antonello, Ivan Carlos Ferreira;Pizzato, Alessandra;
Jornal Brasileiro de Nefrologia , 2009, DOI: 10.1590/S0101-28002009000400005
Abstract: introduction: nutrition plays an important role in kidney disease. the nutritional recommendation is to offer a high-protein diet, adequate in energy and phosphorus according to the kidney disease outcomes quality initiative (k/doqi) guidelines. control and/or prevention of the complications of chronic kidney disease (ckd) are essential, because ckd poses clinical challenges directly related to the nutritional status. objective: to investigate the possible associations between energy, protein, and phosphorus intakes in hemodialysis (hd) patients. methods: observational study involving 72 hd patients from two hospitals in the city of porto alegre, brazil. anthropometric data [weight, height, body mass index (imb)] were collected and three-day food intake (daily energy, protein, and phosphorus intakes) was recorded. spearman correlation was used to evaluate associations between food intake variables (p < 0.05). results: the energy, protein, and phosphorus intakes were 28 ± 10 kcal/kg/day, 1,1 ± 0.4 g protein/kg, and 958 ± 374 mg/day, respectively, and the first two were below the k/doqui recommendations. a strong positive correlation was observed between the variables. discussion: assessing the nutritional profile is essential, because correlations between nutrients occur. it is worth emphasizing that the k/doqi guidelines are not met by the patients. conclusion: a positive association between the intakes of energy, protein, and phosphorus is observed in the diet of hd patients. the dietary control of these nutrients is essential to manage ckd complications. therefore, nutritional evaluation in dialysis units is crucial to define the dietary profile of patients and to adjust their prescriptions.
Porcine pericardium as glaucoma implant tube coverage: an experimental study
Pinto, Luciano Moreira;Regatieri, Caio Vinicius Saito;Tavares, Ivan Maynart;Rigueiro, Moacyr Pezati;
Arquivos Brasileiros de Oftalmologia , 2008, DOI: 10.1590/S0004-27492008000500003
Abstract: purpose: to evaluate the inflammatory response associated with the use of processed porcine pericardium and glycerin-preserved homologous sclera as silicone glaucoma drainage device coverage in a rabbit experimental model. methods: eight new zealand white rabbits' eyes received an equal-sized glycerin-preserved homologous scleral patch or a double-layered processed porcine pericardium that was sutured to the bare sclera covering a silicone tube. conjunctival hyperemia was graded using the double-blind method during the immediate postoperative period and during the first, third, and seventh postoperative weeks. after the seventh week, the enucleated eyes were histopathologically examined. they were also evaluated for signs of patch graft melting, tube erosion and chemosis. results: there was no occurrence of graft melting or tube exposure, although porcine pericardium was associated with greater inflammation through clinical observation. light microscopy revealed marked inflammation surrounding the porcine pericardium with foreign body granuloma formation. on the other hand, the sclera group presented milder inflammation with foreign body granulomas only around the sutures. conclusions: porcine pericardium is associated with significant inflammation when used as tube coverage in a rabbit model, at both histopathologic and clinical levels, when compared to glycerin-preserved homologous sclera during the seven-week follow-up period.
Qualidade de ma??s ?Gala? armazenadas em atmosfera controlada dinamica e estática com renova??o do ar
Brackmann, Auri;Giehl, Ricardo Fabiano Hettwer;Pinto, Josuel Alfredo Vilela;Steffens, Cristiano André;Sestari, Ivan;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000200037
Abstract: this experiment was carried out aiming to evaluate the effect of periodical removal of the atmosphere of controlled atmosphere chambers with fresh air and the use of dynamic atmosphere on quality of 'gala' apples. evaluated treatments were: (1) control (without air renovation); (2) daily atmosphere renovation during fruit cooling; (3) daily atmosphere renovation during cooling and monthly during controlled atmosphere storage of fruits; (4) monthly atmosphere renovation; (5) 50μl l-1 ethylene inside chamber; and (6) dynamic atmosphere (n2 injection to remove co2). after eight months of storage, daily atmosphere renovation during cooling and monthly during controlled atmosphere storage maintained fruit firmness. none of the evaluated techniques allowed ethylene levels below 5μl l-1 inside the storage chambers. probably, ethylene scrubbing has an equal or higher benefit than air renovation, with lower costs, because atmosphere renovation involves higher costs with nitrogen purchase.
Qualidade de pêssegos cv. "Eldorado" tratados com aminoetoxivinilglicina e ethephon e armazenados em atmosfera controlada
Brackmann, Auri;Giehl, Ricardo Fabiano Hettwer;Sestari, Ivan;Pinto, Josuel Alfredo Vilela;Eisermann, Ana Cristina;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000100013
Abstract: the effect of preharvest application of aminoethoxyvinylglycine (avg) and ethephon combined with controlled atmosphere (ca) storage conditions on peach fruit (cv. eldorado) quality maintenance and chilling injury prevention was investigated, aiming at the maritime transport. treatments evaluated were preharvest application of avg (125g ha-1 and 250g ha-1 at 15 or 21 days before harvest), ethephon (140g ha-1 7 days before harvest), and control, combined with two ca conditions (1.0kpa o2 + 3.0kpa co2 and 2.0kpa o2 + 5.0kpa co2 at 0°c). after 24 days of ca storage plus 2 and 4 days of shelf-life at 15°c, preharvest application of ethephon stimulated fruit ripening by increasing ethylene production and decreasing both flesh firmness and titratable acidity. application of avg did not delay fruit ripening. however, fruit treated with 125g ha-1 of avg at 15 days before harvest showed lower incidence of internal browning than ethephon-treated and control fruit. furthermore, storage of fruit under ca with 2.0kpa o2 + 5.0kpa co2 allowed higher titratable acidity and lower incidence of internal browning.
Condi??es de atmosfera controlada para pêssegos "maciel" colhidos em dois estádios de matura??o
Sestari, Ivan;Giehl, Ricardo Fabiano Hettwer;Pinto, Josuel Alfredo Vilela;Brackmann, Auri;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000500006
Abstract: the objective of this research was to evaluate the effect of temperature and controlled atmosphere (ca) storage conditions on the quality of 'maciel' peaches harvested in two ripening stages. the treatments were: refrigerated air storage (ra) at +0.5°c; ra at -0.5°c; 2.0kpa o2 + 4.0kpa co2 plus -0.5°c; 1.0kpa o2 + 3.0kpa co2 plus -0.5°c; 2.0kpa o2 + 6.0kpa co2 plus -0.5°c. evaluations of fruit quality were carried out after two months of storage plus two and four days at 20°c. fruits stored in 2.0kpa o2 + 4.0kpa co2 at -0.5°c showed the highest firmness independent of ripening stage. the solid soluble content was higher at mature stage independent of storage conditions. occurrence of decay and internal browning were not influenced by ripening stage. however, the ca storage at 1.0kpa o2 + 3.0kpa co2 plus -0.5°c provided the small occurrence of decay and internal browning of flesh pulp. after four days at 20°c fruits at mature stage were completely rotten, independently of storage condition.
Inheritance and potential use of grain color in the identification of genotypes resistant to pre-harvest sprouting in wheat
Santos, Lilian Tais dos;Barth Pinto, Ronald José;Franco, Francisco de Assis;Schuster, Ivan;
Crop Breeding and Applied Biotechnology , 2010, DOI: 10.1590/S1984-70332010000300006
Abstract: the inheritance of grain color and pre-harvest sprouting in wheat was studied to identify genotypes with high resistance to pre-harvest sprouting and evaluate the possible use of grain color in indirect selection of resistant lines. the genotypes of most lines were characterized with regard to the loci that control grain color. no significant correlations between grain color and pre-harvest sprouting resistance were observed, but correlations were useful when the frequency of segregating genotypes with white grain was relatively high. of the eight f2:3 populations evaluated, only two differed significantly in grain sprouting between the white and red classes. three genes for pre-harvest sprouting resistance seem to be present in the genotypes frontana and onix. grain color should not be used as the only criterion for selecting wheat genotypes resistant to pre-harvest sprouting.
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