Aqueous mixtures of glycerol and 2-hydroxypropyl-β-cyclodextrin (CD), two non-toxic eco-friendly substances, were used as a means of extracting antioxidant polyphenols from oak acorn (Quercur robur) husks. The process was optimized by implementing a central composite (Box-Behnken) experimental design and response surface methodology, taking into consideration the critical parameters (independen...

The topical issues for elaboration of new approaches to grow English oak seedlings with the purpose establish sustainable plantations on wooded and reclaimed lands are considered in article. goal research is elaborate a technology growing containerized oak. An integrated assessment variants experiment (growing Hiko Plantek containers various volumes cells) was made by number factors: а) plant g...

A tradeoff between growth and reproduction, often inferred from an inverse correlation between these two variables, is a fundamental paradigm of life-history evolution. Oak species provide a unique test of this relationship because different species mature acorns either in the year of pollination or in the year after pollination. This difference allows for an interspecific comparison testing wh...

We wish to comment on two issues relating to a prediction raised in the article by Randolph1 about our work2. Randolph argues that because ‘low acorn production and moderate mouse densities are the norm [our] data do not explain the cause of the severe acorn failures and contingent crash in mouse populations that might initiate [gypsy] moth outbreaks’. We made no attempt to explain masting peri...

ACORN is a comprehensive and efficient phasing procedure for the determination of protein structures when atomic resolution data are available. Reliable phases can be developed from a fragment composed of a small percentage (less than 5%) of the scattering matter of the unit cell. For example, ACORN has been used to solve a structure of 1093 atoms from only one S atom. The map from ACORN typica...

This study was conducted to evaluate how acom size (small, medium and large) and acorn storage duration (0, 5 and 17 months) influenced Quercus petraea (Mattuschka) moisture content and germination. Acorn size and storage duration did not significantly affect acorn moisture content, but they significantly affected acorn germination performance. When averaged for three acorn sizes, loss of germi...

Abstract Background Prescribed fire is increasingly used to restore and maintain upland oak ( Quercus L. spp.) ecosystems in the central eastern US. However, little known about how prescribed affects recently fallen acorns under different fine fuel loads, which can vary with stand composition basal area, burn season, frequency. We conducted plot-level (1 m 2 ) burns an northern Mississippi, USA...