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1.
Rev. peru. biol. (Impr.) ; 20(3)dic. 2013.
Article in Spanish | LILACS-Express | LILACS, LIPECS | ID: biblio-1522338

ABSTRACT

Se evaluó el efecto ahorrativo de la proteína usando dietas altas en energía. Se utilizó un diseño factorial para medir la interacción de dos niveles de proteína (30% y 35%) y dos niveles de energía digestible (3.3 y 3.7 kcal/g de alimento) sobre la ganancia (GP), conversión alimenticia (CA), proteína retenida (PR), energía retenida (ER) y la relación de eficiencia proteica (REP) en la tilapia del Nilo todos machos (Oreochromis niloticus). En la composición de las dietas se emplearon harina de anchoveta y harina de torta de soya como fuentes de proteína y maíz amarillo duro y subproducto de trigo como fuentes de energía. El aceite de pescado fue añadido para ajustar los niveles de energía requeridos en las dietas experimentales. Se encontraron interacciones altamente significativas (P<0.01) entre la proteína y la energía digestible. Cuando se utilizaron las dietas con 30% de proteína, el incremento del nivel de energía digestible afectó significativamente la GP, CA, PR, ER y la REP, donde el nivel de 3.3 kcal/g tuvo el mejor comportamiento. Con 35% de proteína, el nivel de energía digestible no influyó significativamente sobre la GP, CA, PR, ER y la REP, sin embargo el nivel de 3.0 kcal/g tuvo el mayor rendimiento. Cuando se compararon las dos dietas no se observaron diferencias estadísticamente significativas. Considerando el costo de la proteína dietaría se concluyó que la mejor respuesta fue obtenida con la dieta de 30% de proteína y 3.7 kcal/g de energía digestible y una relación optima energía digestible/proteína digestible de 13.75 kcal/g de proteína.


The sparing effect of the dietary protein using diets with high energy levels was evaluated. A factorial design was used to examine the interaction of two levels of protein (30 and 35%) and two levels of digestible energy (3.3 and 3.7 kcal/g) on the weight gain (WG), food conversion FC), retained protein (PR), retained energy (ER) and protein efficiency ratio (PER) in “sex reversal Nile tilapia” ( Oreochromis niloticus). Diets contained anchovy and soybean meal as protein sources and yellow corn and wheat bran as energy sources. The fish oil was used to adjust the energy levels. There were highly significant interactions (P<0.01) between the experimental diets. In diets with 30% proteins, the increase of digestible energy significantly enhances WG, FC, PR, ER and PER, where the level of 3.7 kcal/g had the best performance. With 35% protein, the increase of digestible energy had not significant influence on the GP, CA, PR, ER and PER, however the growth of sex reversal Nile Tilapia was improved with the level of 3.3 kcal/g. When were compared both diets, were not find significant differences. Considering the protein cost, it can be concluded that best response was obtained with a diet containing 30 % of protein and 3.7 kcal/g of digestible energy and optimum digestible energy/digestible protein ratio of 13.75 kcal/g protein.

2.
Rev. Soc. Bras. Med. Trop ; 44(6): 708-716, Nov.-Dec. 2011. graf, tab
Article in English | LILACS | ID: lil-611771

ABSTRACT

INTRODUCTION: Publications are often used as a measure of success in research work. Chagas disease occurs in Central and Southern America. However, during the past years, the disease has been occurring outside Latin America due to migration from endemic zones. This article describes a bibliometric review of the literature on Chagas disease research indexed in PubMed during a 70-year period. METHODS: Medline was used via the PubMed online service of the U.S. National Library of Medicine from 1940 to 2009. The search strategy was: Chagas disease [MeSH] OR Trypanosoma cruzi [MeSH]. RESULTS: A total of 13,989 references were retrieved. The number of publications increased steadily over time from 1,361 (1940-1969) to 5,430 (2000-2009) (coefficient of determination for linear fit, R²=0.910). Eight journals contained 25 percent of the Chagas disease literature. Of the publications, 64.2 percent came from endemic countries. Brazil was the predominant country (37 percent), followed by the United States (17.6 percent) and Argentina (14 percent). The ranking in production changed when the number of publications was normalized by estimated cases of Chagas disease (Panama and Uruguay), population (Argentina and Uruguay), and gross domestic product (Bolivia and Brazil). CONCLUSIONS: Several Latin American countries, where the prevalence of T. cruzi infection was not very high, were the main producers of the Chagas disease literature, after adjusting for economic and population indexes. The countries with more estimated cases of Chagas disease produced less research on Chagas disease than some developed countries.


INTRODUÇÃO: Publicações são frequentemente utilizadas como uma medida de sucesso do trabalho de pesquisa. A doença de Chagas (DCh) ocorre na América Central e do Sul. Porém, durante os últimos anos, a doença tem ocorrido fora da América Latina, devido à migração das zonas endêmicas. Este artigo descreve uma análise bibliométrica da literatura sobre as pesquisas da doença de Chagas indexadas no PubMed, durante um período de 70 anos. MÉTODOS: O Medline foi usado através do serviço online da US PubMed da National Library of Medicine de 1940 a 2009. A estratégia de busca foi: Chagas disease [MeSH] OR Trypanosoma cruzi [MeSH]. RESULTADOS: Um total de 13.989 referências foi recuperado. O número de publicações aumentou de forma constante com 1.361 (1940-1969) para 5.430 (2000-2009) (coeficiente de determinação para o ajuste linear, R² = 0, 910). Oito revistas contiveram 25 por cento da literatura sobre a DCh. Um total de 64,2 por cento das publicações veio de países endêmicos. O Brasil foi o predominante (37 por cento), seguido pelos Estados Unidos da América (17,6 por cento) e Argentina (14 por cento). O ranking da produção foi alterado, quando o número de publicações foi normalizado por casos estimados da doença de Chagas (Panamá e Uruguai), população (Argentina e Uruguai), e Produto Interno Bruto (Bolívia e Brasil). CONCLUSÕES: Vários países da América Latina com uma prevalência não muito elevada de infecção pelo T. cruzi foram os principais produtores, após ajuste para os índices econômicos e populacionais. Os países com mais casos estimados da DCh produziu menos pesquisas em doença de Chagas que alguns países desenvolvidos.


Subject(s)
Humans , Bibliometrics , Chagas Disease , Periodicals as Topic/statistics & numerical data , Research/statistics & numerical data , Americas
3.
Arch. méd. Camaguey ; 11(6): 0-0, nov.-dic. 2007.
Article in Spanish | LILACS | ID: lil-731948

ABSTRACT

Se presenta el caso de una paciente de 72 años con antecedentes de hipertensión arterial y acalasia de esófago de varios años de evolución que se le diagnosticó un seudoquilotórax de posible causa ideopática por tratarse de una enfermedad muy rara y que puede ser originada por múltiples desórdenes. Se destaca la clínica, el diagnóstico positivo y el diferencial; así como se enfatiza en la posible patogénesis de este tipo de enfermedad y en especial a esta paciente. Se señala la terapéutica especialmente el tratamiento no quirúrgico, así como el resultado obtenido en el estudio y los aplicados en esta entidad por otros autores.


A 72 years-old patient was presented with antecedents of arterial hypertension and esophageal achalasia of several years of evolution that it was diagnosed a pseudochylothorax of possible idiopathic cause being about a very rare disease that may be originated by multiple disorders. The clinic, the differential and positive diagnosis are point out; as well as it emphasize in the possible pathogenesis in this type of disease and specially to this patient. The therapy mainly non surgical treatment is point out, also the result obtained in the study and the applied ones in this entity by other authors.

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