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430 result(s) for "ITS"
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Análisis filogenético de aislamientos patogénicos de la familia botryosphaeriaceae en cacao (Theobroma cacao L.) en la zona de Los Ríos
Los problemas fitosanitarios causados por hongos vasculares que afectan a las plantaciones de cacao CCN-51, han tomado gran importancia en las últimas décadas, por los daños que le producen. Especies de la familia Botryosphaeriaceae están asociadas a cancros y secamiento de yemas, muerte descendente, pudrición de frutos y pudrición del cuello, síntomas que se han observados en diferentes zonas y que merman la producción de la planta. Con el objetivo de caracterizar e identificar a nivel molecular aislamientos patogénicos de este hongo, se muestrearon cinco árboles sintomáticos seleccionados de fincas localizadas los cantones: Buena Fe, Mocache, Quevedo, Quinsaloma y Valencia de la provincia de Los Ríos, obteniendo 15 aislamientos de los cuales se extrajo ADN y utilizaron secuencias de las regiones de ITS (Internal transcribed spacer) y EF1-a (Factor de elongación de alpha). Los tamaños de secuencia se verificaron mediante electroforesis y se establecieron las identidades putativas de 3 especies utilizando la herramienta de Basic local aligment (BLAST). Los árboles filogenéticos construidos mediante los algoritmos de máxima verosimilitud y vecinos cercanos, con los aislamientos en cinco cantones, confirmaron la presencia de Lasiodiplodia theobromae en Quevedo, Diplodia seriata en Quinsaloma y Botryosphaeria dothidea en Valencia, Mocache y Buena Fe, resaltando una politomía entre estos últimos.
Software : a technical history
Software history has a deep impact on current software designers, computer scientists, and technologists. System constraints imposed in the past and the designs that responded to them are often unknown or poorly understood by students and practitioners, yet modern software systems often include \"old\" software and \"historical\" programming techniques. This work looks at software history through specific software areas to develop student-consumable practices, design principles, lessons learned, and trends useful in current and future software design. It also exposes key areas that are widely used in modern software, yet infrequently taught in computing programs. Written as a textbook, this book uses specific cases from the past and present to explore the impact of software trends and techniques.
Seismic situation in southern Jiangxi and its adjacent areas
Seismic geology, bands, gaps, and energy; the spatiotemporal distribution of seismic activity; and the frequency of small earthquakes were used to track the characteristics of the seismic activity in southern Jiangxi and its adjacent areas (23.66°N~27.20°N, 113.50°E~118.84°E). Earthquakes of magnitude 4.0 or higher in the region were synchronous with earthquakes of magnitude 5.0 or higher in the southeast coastal seismic zone. Earthquakes of magnitude 2.5 or higher have appeared in the surrounding area since 2018. Earthquakes of magnitude 3.0 or higher have occurred in belts since 2020; the clustering of moderate earthquakes has increased, and earthquakes of magnitude 4.0~5.0 have not occurred, indicating a state of energy accumulation. In July 2016, the southeastern coastal seismic zone entered the fifth active phase since 1900, with active earthquakes of magnitude 5.0 or higher. Southern Jiangxi and its adjacent areas are involved. A risk exists of earthquakes of magnitude 5.0 or higher occurring in the nex
Popper's Open society after fifty years : the continuing relevance of Karl Popper
Popper's Open Society After Fifty Yearspresents a coherent survey of the reception and influence of Karl Popper's masterpiece The Open Society and its Enemiesover the fifty years since its publication in 1945, as well as applying some of its principles to the context of modern Eastern Europe.This unique volume contains papers by many of Popper's contemporaries and friends, including such luminaries as Ernst Gombrich, in his paper 'The Open Society and its Enemies: Remembering its Publication Fifty Years Ago'.
滇金丝猴毛首线虫分子鉴定及其ITS序列分析
为了解从滇金丝猴(Rhinopithecus bieti)消化道检获的线虫种属关系,对虫体进行形态学鉴定、PCR扩增虫体ITS基因序列、测序分析,并利用MEGA 6.0软件构建遗传系统进化树。结果显示:检获虫体与毛首线虫(Trichuris sp.)相似度为99.05%,滇金丝猴所感染虫体为毛首线虫。进化树结果显示样品与人感染的毛首鞭形线虫(Trichuris trichura)亲缘关系较近,表明二者为近缘种,具有人兽共患风险,这可为灵长类动物毛首线虫的鉴别诊断、种群结构等更深入地研究提供理论依据。
Acerca de los sentidos del mundo en Ser y tiempo
En Ser y tiempo encontramos posiciones inconsistentes acerca la génesis de la ciencia y la homogeneización del espacio. Sobre la primera es manifiesto el contraste entre un modelo de carácter privativo, caracterizado como un proceso de desmundanización que permite aprender la realidad en su sustancialidad y otro, proyectivo que presenta a la matematización como un modo positivo de tematización. En el presente artículo quisiéramos sostener que estas diferencias estarían asociadas a el hecho de que en esta obra Heidegger opera con dos definiciones de mundo diferentes, y el contraste entre la prescripción de una fundamentación fenomenológico trascendental del sentido ontológico-categorial por el sentido ontológico-existencial y las descripciones históricas sobre los procederes inversos que derivaban el sentido ontológico-existencial del ontológico-categorial.