نتایج جستجو برای: vigor
تعداد نتایج: 5125 فیلتر نتایج به سال:
The effect of genotype-temperature interactions on body weight has been studied in a natural population of Drosophila melanogaster using four isogenic strains derived from it, and their hybrid F(1) and F(2) progenies. Measurements were made at four constant temperatures-25 degrees , 21 degrees , 17 degrees and 13 degrees C-and at a temperature oscillating between 17 degrees and 25 degrees C.-Lo...
Montane forests in the northeastern United States have experienced symptoms of declining vigor, such as branch dieback and increased mortality, over the last half-century. These declines have been attributed to the cumulative impacts of acid deposition, but reconstructing these declines from tree-ring records has proved difficult because of confounding factors that affect low-frequency growth p...
Ecosystems are degraded through human activities and a healthy ecosystem sustains the requirements of human and natural environment, as well as the conservation of economic and social values. Various indicators are required to assess the health of ecosystems. This study evaluates the factors affecting the overall ecosystems health including: vigor, structure, and resilience in the Iiril watersh...
In this study, the effects of seaweed extract (Ascophyllum nodosum) on seed germination stimulation and growth indices in chickpea were studied. A factorial experiment was performed on the basis of a completely randomized design with 3 replications. Treatments consisted of seaweed extract at four levels (0, 1.5, 2.5 and 3.5%) and drought stress at four levels (0, -0.3, -0.6 and -0.9 MP). Drough...
This research work aims to raise awareness of the results of the student engagement in university students of three careers in technologies, of a university in the south of Mexico, through the development of graphics that allows displaying in an adequate manner the cases under study, facilitating the interpretation of the same. To measure the student engagement was used the instrument Utrecht W...
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