Poplars are fast-growing trees of cool, temperate climates that find use in the manufacture of pulp, matches and packing cases. They are also widely grown for shelter and for ornamental purposes. Poplars are deciduous trees that flower in the spring soon after new leaves arise. Flowers develop from the axils of these leaves, and arise on short stems carrying a string of flowers (a catkin). They...

In trees, xylem tissues play a key role in the formation of woody tissues, which have important uses for pulp and timber production; also DNA methylation plays an important part in gene regulation during xylogenesis in trees. In our study, methylation-sensitive amplified polymorphism (MSAP) analysis was used to analyze the role cytosine methylation plays in wood formation in the commercially im...

To evaluate plant and herbivore responses to nitrogen we conducted a fertilization study at a low and high pollution site in the mixed conifer forests surrounding Los Angeles, California. Contrary to expectations, discriminant function analysis of oak herbivore communities showed significant response to N fertilization when atmospheric deposition was high, but not when atmospheric deposition wa...

Intracranial haemorrhage (ICH) has become a critical healthcare emergency that needs accurate assessment and earlier diagnosis. Due to the high rates of mortality (about 40%), early classification detection diseases through computed tomography (CT) images were needed guarantee better prognosis control occurrence neurologic deficiencies. Generally, in diagnoses test for severe ICH, CT imaging br...

Novel magnetic carbon microtube-based solid acid was synthesized via the carbonization of FeCl3-doped willow catkin and benzenediazoniumsulfonate acid-based sulfonation. The biomass provided special microtube structure high surface area 215 m2/g for novel acid. well conserved during mild (400 °C) sulfonation process. large number acidic sites (2.3 mmol/g) on quite accessible to reactants. Its p...

 In 2007 and 2008, the influence of pollen source on the shell and kernel traits of resulting seeds and on fruit set was examined to evaluate the potential for Xenia or Metaxenia in Persian walnut. Pistillate flowers of ‘Jamal’, ‘Chandler’, ‘Hartley’ and ‘Pedro’ were crossed with the pollen of ‘Serr’, ‘Z60’ and ‘Damavand’. The pistillate flowers on each female parent were covered about one week...