Báo cáo lâm nghiệp: "Strength properties of thermally modified softwoods and its relation to polymeric structural wood constituents" pot

... of irradiation on the behaviour and reproduction success of eight toothed bark beetle Ips typographus (Coleoptera: Scolytidae) M. T 1 , J. V 2 1 Faculty of Forestry and Wood Sciences, ... Slovakia ABSTRACT: Irradiation experiments on Ips typographus (L., 1758) with doses of 15 and 30 Gy (cobalt 60) were con- ducted in 2006. e effect...

Ngày tải lên: 07/08/2014, 03:22

... environmental indicators.  e aim of this study was to clarify to what extent the spatial variation of environment a ects growth and adaptive traits in a provenance trial, and whether blocking can ... genetic variation within populations and/ or environmental variation on very small scales. Analysis of covariance confi rmed the expected signifi cant provena...

Ngày tải lên: 07/08/2014, 10:21

... pure and mixed stands. Growth of oaks in mixed stands with beech 461 The effects of stand density (Rdi o ak + beech) , species com- position (mix b eech), stand age of oak (age o ak), and site index of ... the stand basal area increment as a function of dominant height, height increment of the dominant trees, and stand density...

Ngày tải lên: 07/08/2014, 16:20

... under irradiation. Poplar wood was impregnated with extracts of other woods; on Figure 12, we report the colour variation of impregnated poplar wood as a function of the colour variation of woods the extracts of which ... links between wood extracts and colour stability of wood, we have measured, for the woods the extracts of which have been studied abov...

Ngày tải lên: 07/08/2014, 16:20

... 52]. Classification of thinning methods varies due to different criteria, including the type of thinning, intensity (grade), re- turn interval, and the timing of the first thinning [48]. Two major types of thinning ... again during the last thinning. In the T2, 258 crop trees were chosen in the first thinning, and only 62% of these trees were chosen again during the las...

Ngày tải lên: 07/08/2014, 16:20

... balance between gross transformations of organic N into ammonium or nitrate and immobilisation of mineral N by living microorganisms. Net nitrification results from gross oxidation of ammonium and organic ... mineralization in spruce and Douglas fir respectively, and close to net mineralization in Corsican pine, beech and oak. 3.3. Short term gross mineraliza...

Ngày tải lên: 07/08/2014, 16:20

... article Strength properties of thermally modified softwoods and its relation to polymeric structural wood constituents Michiel J. B a * ,JorisV  A b ,BôkeF.T c ,EdoV.K a a Plato International ... temperature and chemical effects on wood stability. Part 2. The effect of heat on the softening of radiata pine, Wood Sci. Technol. 19 (1985) 5...

Ngày tải lên: 07/08/2014, 16:21

... 10.1051/forest:2005001 Original article Seasonal changes of plant hydraulics, water relations and growth of Aesculus hippocastanum seedlings infested by the leafminer Cameraria ohridella Fabio RAIMONDO, ... miner Cameraria ohridella causes premature defoliation in Aesculus hippocastanum. The impact of the parasite on seasonal changes of water...

Ngày tải lên: 08/08/2014, 00:21

... petraea Liebl.) site index variations in relation to climate, topography and soil in even-aged high-forest stands in northern France Laurent BERGÈS a *, Richard CHEVALIER a , Yann DUMAS a , Alain ... water and nutrient budgets in predicting site index variations The climate/water-related factors and nutrient-related fac- tors explained 0 to 25...

Ngày tải lên: 08/08/2014, 00:22

... 2006 DOI: 10.1051/forest:2005112 Original article Seed germination of Quercus robur, Q. pyrenaica and Q. ilex and the effects of smoke, heat, ash and charcoal Otilia REYES*, Mercedes CASAL Área ... account the type of resprout, Q. robur, Q. pyrenaica and Q. ilex are Pyrogeophyte species. The first of these resprouts from the stump or...

Ngày tải lên: 08/08/2014, 00:22

... freezing and exotherm profiles for the four species studied (in increasing order of frost resistance) . Exotherms represented are obtained from mean values of starting point, width and duration of ... leaf litter cover which protected acorns during winter. The insulating role of leaf litter along a winter season in a Q. faginea stand in the Zaragoza province was...

Ngày tải lên: 08/08/2014, 01:22

... efficiency and CO 2 compensation point associated with midday stomatal closure and mid- day depression of net CO 2 exchange of leaves of Quercus suber. Planta 1 62, 193 -20 3 Tenhunen ... patterns in forest stands of lobolly pine (Pinus taeda L). In: Abstract collection of the international workshop on Ecophysiology and Genetics of...

Ngày tải lên: 08/08/2014, 18:21

... The role of glutamine synthetase, glutamate synthase and glutamate dehydrogenase in ammonia assimilation by the mycorrhizal fungus Pisolithus tinctorius J.L. Kershaw G.R. ... inhi- bition by MSX. The increase in the glutamate pool appeared to indicate assi- milation of ammonia into glutamate by GDH activity. Inhibition of gl...

Ngày tải lên: 09/08/2014, 04:20

... 19:205-210. 6. Takahashi K, Ishikawa N, Sadamoto Y, Sasamoto H, Ohta S, Shiozawa A, Miyoshi F, Naito Y, Nakayama Y, Tomita M: E -Cell 2: Multi-plat- form E -Cell simulation system. Bioinformatics 2003, 19:1727-1729. 7. ... oxidant- induced decrease of hexokinase and pyruvate kinase, and the maximum activity of these enzymes was allowed to change according to the ratio...

Ngày tải lên: 13/08/2014, 22:22

... found previously [10], the size of the expression product of a random cDNA expression clone is predictive of the reading frame of the cDNA insert. Most expression products with sizes of less than ... library analysisFigure 1 Flow chart of hEx1 library analysis. Original library of 193,536 clones 37,830 clones selected for protein expression using anti-RGS His an...

Ngày tải lên: 14/08/2014, 14:21