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Search Results: 1 - 10 of 51508 matches for " Carlos Zamudio "
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Extraction and Characterization of Starch Fractions of Five Phenotypes Pachyrhizus tuberosus (Lam.) Spreng  [PDF]
José Luis Ramírez Ascheri, Luz Haydee Bravo Zamudio, Carlos Wanderlei Piler Carvalho, Arturo Melendez Arevalo, Lais Martins Fontoura
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.519200
Abstract: Pachyrhizus tuberosus is a native plant of short life cycle found in South America riverside, which provides easy starch extraction from its tuberous roots. The aim of this study was to determine the physicochemical, rheological and functionality of the starch granules extracted from the roots of five phenotypes identified as V2, V3, V4, V6 and V7. Protein and ash content of all phenotypes were considerable high when compared to other root sources such as cassava varying from 4.35% to 7.43% and 1.58% to 2.49%, respectively, whereas lipid content was lower, between 0.29 and 0.49%. The starch granules were mostly circular and polygonal with varied sizes. The starch granules structural conformation showed cristallinity A type, normally for cereals. The maximum pasting viscosity at 95 ranged from 1644 cP (V7) to 2232 cP (V2). The initial temperature of pasting formation occurred at 69.4 for V2, 71.5 for V3, 87.9 for V4, 69.5 for V6 and 71.5 for V7. These values showed high variability within the phenotypes and generally high for roots and tubers starches. The maximum viscosity at 95 for V2, V3, V4, V6 and V7 were 2232, 2150, 1995, 2214 and 1644 cP, respectively. The viscosity curves showed low tendency to retrogradation. The thermal properties showed that the enthalpy of gelatinization varied from 8.91 J/g (V3) to 11.78 J/g (V2). The initial gelatinization temperature varied from 63.19 (V6) to 65.14 (V4). The swelling power at 90 ranged from 14.7% to 20.1% p/p and solubility from 10.3% (V2) to 27.2% (V7). It is concluded that Pachyrhizus tuberosus starch showed low retrogradation (1320 - 1560 cP) comparable to non-common native waxy starches, a feature which indicates the capability of using this natural and easy extraction starch source as gelling agent in certain manufactured food of undesirable retrogradation.
Visibilidade e monitoramento científico na área nuclear e ciências relacionadas: uma perspectiva a partir da produtividade do IPEN-CNEN/SP
Pinto, Adilson Luiz;Igami, Mery P. Zamudio;Bresssiani, José Carlos;
Perspectivas em Ciência da Informa??o , 2010, DOI: 10.1590/S1413-99362010000200013
Abstract: the main objective of this paper was to monitor and obtain indicators concerning the international visibility of the scientific activities developed in ipen-cnen/sp. the articles published along the three decades and registered in the web of science (wos) were used as parameters. it was possible to identify the central journal and author nucleus, index of visibility and collaboration as well as the scientific growth. scientometric and bibliometric instruments were used for data analysis. the results obtained confirms a significative ipen visibility in wos.
Propuesta de ubicación taxonómica para los chayotes silvestres ( Sechium edule, Cucurbitaceae) de México
Rafael Lira,Javier Castrejón,Sergio Zamudio,Carlos Rojas Zenteno
Acta botánica mexicana , 1999,
Abstract: En este trabajo se propone una clasificación taxonómica para el chayote, Sechium edule (Jacq.) Swartz, que incluye dos subespecies: S. edule ssp. edule y S. edule ssp. sylvestre. Adicionalmente, se documentan por primera vez poblaciones silvestres de la especie para los estados de Querétaro y Puebla, México, y se proporcionan datos sobre la distribución de todas las poblaciones similares hasta ahora registradas en el país.
Can Improve Iron Biofortification Antioxidant Response, Yield and Nutritional Quality in Green Bean?  [PDF]
Juan P. Sida-Arreola, Esteban Sánchez, Graciela D. ávila-Quezada, Paul B. Zamudio-Flores, Carlos H. Acosta-Mu?iz
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.611127
Abstract: The aim of this study was to evaluate the effect of iron biofortification on antioxidant response, yield and nutritional qualityof green bean (Phaseolus vulgaris L.) under greenhouse conditions. Fe was applied using two forms (FeSO4 and Fe-EDDHA) at four doses of application (0, 25, 50 and 100 μm) added under a hydroponic system, and were tested over a period of 40 days. The Fe content was assessed in seeds, as well as the activity of antioxidant enzymes, production of H2O2, yield and nutritional quality. The results being obtained indicated that the accumulation of Fe in bean seeds enhanced with the application of Fe-EDDHA at the dose of 25 μm. This demonstrated that low Fe application dose was enough to increase Fe levels in seeds of common bean. In addition, Fe-EDDHA application form at 50 μmol was the best treatment to improve crop yield. Respect to antioxidant system, chelated form of Fe (Fe-EDDHA) was more effective in the activation of antioxidant enzymes (CAT, SOD and GSH-PX), and a lower content of H2O2 in green bean seeds. Finally, to raise the Fe concentration in bean under biofortification program was a promising strategy in cropping systems in order to increase the ingestion of iron and antioxidant capacity in the general population and provided the benefits that this element offered in human health.
Blefarospasmo essencial e espasmo hemifacial: características dos pacientes, tratamento com toxina botulínica A e revis?o da literatura
Schellini, Silvana Artioli;Matai, Olívia;Igami, Thais Zamudio;Padovani, Carlos Roberto;Padovani, Carlos Pereira;
Arquivos Brasileiros de Oftalmologia , 2006, DOI: 10.1590/S0004-27492006000100005
Abstract: purpose: to evaluate the characteristics of the essential blepharospasm and hemifacial spasm patients and the feasible treatment with botulinum toxin a. methods: thirty-four essential blepharospasm or hemifacial spasm patients were evaluated according to gender, ocular complaint, time of disease, treatment outcome and complications. results: age median was 63 years and the mean was 61 years, with no difference regarding sex; 66.66% of the patients had hemifacial spasm and 33.33%, essential blepharospasm. many patients complained of dry eye associated with involuntary spasm. botulinum toxin a showed a positive outcome in 91.30% of the treated patients and complications observed after treatment were eyelid ptosis (8.33%) and buccal angle deviation (8.33%). conclusion: essential blepharospasm and hemifacial spasm occurred in the elderly, of both sexes. treatment with botulinum toxin a was useful, with very low complication rates.
Association of Major Depressive Episode with Negative Outcomes of Tuberculosis Treatment
Cesar Ugarte-Gil, Paulo Ruiz, Carlos Zamudio, Luz Canaza, Larissa Otero, Hever Kruger, Carlos Seas
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0069514
Abstract: Background Pulmonary tuberculosis (TB) persists an important contributor to the burden of diseases in developing countries. TB control success is based on the patient’s compliance to the treatment. Depressive disorders have been negatively associated with compliance of therapeutic schemes for chronic diseases. This study aimed to estimate the significance and magnitude of major depressive episode as a hazard factor for negative outcomes (NO), including abandon or death in patients receiving TB treatment. Methodology/Principal Findings A longitudinal study was conducted to evaluate the association of major depressive episode (MDE), as measured by a 5-item version of the Center for Epidemiological Studies Depression Scale (CES-D) with NO to TB treatment. Patients with confirmed TB were enrolled before the start of TB treatment. Baseline measurements included socio-demographic variables as well as the CES-D, which was also applied every month until the end of the treatment. Death and treatment default were assessed monthly. Survivor function (SF) for NO according to MDE status (CES-D≥6) at baseline (MDEb) was estimated. Cox’s Regression was performed for bivariate analyses as well as for the multivariate model. A total of 325 patients accepted to participate in the study, of which 34 where excluded for diagnosis of MDR-TB. NO was observed in 24 patients (8.2%); 109 (37%) presented MDEb. Statistically significant difference was found on the SF of patients with and without MDEb (0.85 vs. 0.96, p-value = 0.002). The hazard ratio for NO, controlled for age, sex, marital status and instruction level was 3.54 (95%CI 1.43–8.75; p-value = 0.006). Conclusion The presence of MDE at baseline is associated to NO of TB treatment. Targeting detection and treatment of MDE may improve TB treatment outcomes.
Notas sobre el género Berberis (Berberidaceae) en México
Zamudio, Sergio;
Acta botánica mexicana , 2009,
Abstract: some historical errors related with the application of the names berberis trifolia schltdl. et cham., b. ilicina schltdl. and b. schiedeana schltdl., which were assigned subsequently to the same entity, are clarified. berberis trifolia is recognized as the valid name because it was the first one applied to the species. the type locality of this species is located near the border between the states of puebla and veracruz, between cuauhtotolapa (la gloria), municipality of perote, veracruz and tlachichuca, municipality of tlachichuca, puebla. berberis alpina zamudio is described as a new species; it has been extensively confused with b. schiedeana (synonymous of b. trifolia); with which is not related. the correct identities of b. pallida hartw. ex benth. and b. hartwegii benth. are determined, and lectotypes for b. hartwegii benth., mahonia paxii fedde and m. zimapana fedde are designated.
Pinguicula elizabethiae una nueva especie de la seccion Orcheosanthus (Lentibulariaceae) de los estados de Hidalgo y Querétaro, México
Sergio Zamudio
Acta botánica mexicana , 1999,
Abstract: Se presenta una nueva especie de Pinguicula perteneciente a la sección Orcheosanthus, procedente de los ca ones del arroyo Tolimán y del río Moctezuma, en los estados de Hidalgo y Querétaro. Pinguicula elizabethiae Zamudio presenta los lóbulos de la corola ampliamente obovados a suborbiculares, caracteres que comparte con P. colimensis McVaugh et Mickel y P. cyclosecta Casper; de la primera se distingue por las "hojas de verano" con el margen ligeramente involuto y las "hojas de invierno" espatuladas a oblongo-espatuladas; de la segunda se diferencia por las "hojas de verano" obovado-espatuladas a suborbicular-espatuladas, que se adelgazan gradualmente en la base, la que es densamente ciliada, con largos tricomas multicelulares de más de 5 mm de longitud; también se diferencia de ambas por el hábitat que ocupa.
Notas sobre el género Berberis (Berberidaceae) en México
Sergio Zamudio
Acta botánica mexicana , 2009,
Abstract: En este trabajo se aclaran varios errores e imprecisiones históricas relacionadas con la aplicación de los nombres Berberis trifolia Schltdl. et Cham., B. ilicina Schltdl. y B. schiedeana Schltdl., que fueron asignados subsecuentemente a una misma especie. Se concluye que el binomio válido para esta entidad es B. trifolia, que fue el primero válidamente publicado aplicado a este taxon, quedando como sinónimos los dos restantes. La localidad tipo correspondiente se ubica en los límites entre los estados de Puebla y Veracruz, entre Cuauhtotolapa (La Gloria), municipio de Perote, Veracruz y Tlachichuca, municipio de Tlachichuca, Puebla. Se describe Berberis alpina Zamudio sp. nov., entidad que había estado confundida con B. schiedeana Schltdl. (sinónimo de B. trifolia). Asimismo se determina la correcta identidad de Berberis pallida Hartw. ex Benth. y de B. hartwegii Benth., de las que se proporcionan descripciones amplias; se designan lectotipos de B. hartwegii Benth., Mahonia paxii Fedde y M. zimapana Fedde.
Dos nuevas especies de Pinguicula (Lentibulariaceae) del centro y norte de México.
Sergio Zamudio
Acta botánica mexicana , 1988,
Abstract:
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