Certain types of chlorosis of leaves of green plants' are universally attributed to deficiencies or unbalanced conditions of one or more of the essential mineral elements. Agreement does not always exist, however, as to whether a specific type of leaf-symptom pattern is related to total content of the deficient element or only to a specific fraction of it. This is particularly true of the presu...

The wave effect and the shyness phenomenon in Alnus acuminata (Kunth) are crown parameters rarely studied, but important quality of wood standing trees, therefore, a morphometric modeling crowns homogeneous forests Sierra Norte de Puebla was carried out. In 20 rectangular sites 1,000 m2, following were evaluated: total height (TA), normal diameter (ND), (CD) cover (CC). Kruskal Wallis test appl...

background: asthma is a chronic multifactorial disease with a high prevalence. among asthma risk factors, the effect of baking in wood tenor ovens (traditional form of baking) on bronchial asthma is still debated. the aim of this study was to determine the association between baking in wood tenor ovens and incidence and control of bronchial asthma. materials and methods: this descriptive study ...

To recover verticality after disturbance, angiosperm trees produce 'tension wood' allowing them to bend actively. The driving force of the tension has been shown to take place in the G-layer, a specific unlignified layer of the cell wall observed in most temperate species. However, in tropical rain forests, the G-layer is often absent and the mechanism generating the forces to reorient trees re...

Some ecological restoration projects include elements of trial and error where new measures are repeatedly tried, evaluated, and modified until satisfactory results are achieved. Thereafter, the resulting methods may be applied on larger scales. A difficult step is judging whether developed “best-practice” methods have become reasonably ecologically functional or whether further experimentation...