نتایج جستجو برای: secondary growth

تعداد نتایج: 1101370  

2002
STEPHEN G. PERZ ROBERT T. WALKER

— This paper provides a household-level framework to understand the occurrence of secondary forests. We focus on the role of household life cycles as determinants of secondary vegetation on small farms in tropical Latin America. Following a review of socioeconomic research on secondary growth and a theoretical discussion of life cycle dynamics and land use, we pursue an empirical analysis of th...

2013
Danhua Xu Donghua Fan Wenzhong Shen

We report a simple catalyst-free vapor-phase method to fabricate Zn1-xCuxO micro-cross structures. Through a series of controlled experiments by changing the location of the substrate and reaction time, we have realized the continuous evolution of product morphology from nanorods into brush-like structures and micro-cross structures at different positions, together with the epitaxial growth of ...

2018
Eun Kyung Park Suresh Giri

Most of the developed countries achieving their economic growth by exploring the innovation in the various sector. This research paper is focused on exploring innovation in the agriculture sector of Nepal. The NSI framework is analysed to enhance the quality of large cardamom. Furthermore, qualitative research method is conducted where data is collected from the primary and secondary sources. M...

Journal: :Journal of Statistical Mechanics: Theory and Experiment 2008

Journal: :mycologia iranica 2014
mohammad ali tajick ghanbari hamideh seid mohammadkhani valiollah babaeizad

fungi produce a wide range of secondary metabolites such as antibiotics, toxins, alkaloids, fatty acids, ketones and alcohols during active cell growth. the present study was aimed to identify secondary metabolites from some penicillium species, using gc-ms. many important compounds such as 3-oxoquinuclidine in penicillium jenseii, formamidine in penicillium pusillum, orcinol and 1,3,8-p-mentha...

Journal: :Archives of disease in childhood 1990
C A MacKenzie R D Milner U Bergvall T Powell

We describe a boy who presented at the age of 7 years with short stature due to hypopituitarism. Six months after starting appropriate hormone replacement treatment at the age of 8 he suffered his first generalised convulsion. Further neuroradiological investigation led to the diagnosis of moyamoya syndrome.

2007
Francois David Christian Hagendorf Kay Joerg Wiese

A hierarchical model for the growth of planar arch structures for RNA secondary structures is presented, and shown to be equivalent to a tree-growth model. Both models can be solved analytically, giving access to scaling functions for large molecules, and corrections to scaling, checked by numerical simulations of up to 6500 bases. The equivalence of both models should be helpful in understandi...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2009
Robin L Chazdon Carlos A Peres Daisy Dent Douglas Sheil Ariel E Lugo David Lamb Nigel E Stork Scott E Miller

In the wake of widespread loss of old-growth forests throughout the tropics, secondary forests will likely play a growing role in the conservation of forest biodiversity. We considered a complex hierarchy of factors that interact in space and time to determine the conservation potential of tropical secondary forests. Beyond the characteristics of local forest patches, spatial and temporal lands...

Journal: :Journal of experimental botany 2003
Sookyung Oh Sunchung Park Kyung-Hwan Han

Despite its economic and environmental significance, understanding the molecular biology of secondary growth (i.e. wood formation) in tree species has been lagging behind that of primary growth, primarily due to the inherent difficulties of tree biology. In recent years, Arabidopsis has been shown to express all of the major components of secondary growth. Arabidopsis was induced to undergo sec...

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