Báo cáo lâm nghiệp: "A contribution to the resistance of combined plywood materials to abrasion" potx

... of plywood is available. Plywoods differ in many factors. CONCLUSION e aim of the paper was to propose the method- ology of testing the abrasion resistance of combined water-proof plywood materials ... aim of the paper was to propose the methodology of testing the abrasion resistance of combined water-proof plywood materials with the phenol...

Ngày tải lên: 07/08/2014, 10:21

... terrestrial mammals of pheasantries in southern Moravia is therefore aimed at monitoring the effect of specific properties of these habitats (high diversity of biotopes, high concentration of pheasants, ... form of feed) on the diversity of the community of small terrestrial mammals and on the abundance and viability of their populations. Area of study Two pheas...

Ngày tải lên: 07/08/2014, 03:22

... and tougher than the sum of the values of their parts (H, K 2005). At the end of the 70s and at the begin- ning of the 80s of the 20 th century, the principle of plywood allowed the ... components (e.g. combined boards for the manufacture of doors into passive houses, ice boxes) or these firms offer these materials as “specialities”. Nevert...

Ngày tải lên: 07/08/2014, 04:20

... relation between the extent of the damage and the individual characteristics of the experimental plots. e relation between the extent of the damage and the method of estab- lishment of the stands ... neighbourhood of the sample plots were sources of maturation feeding of the beetles and a place where they gathered. It is a factor, which contributes to...

Ngày tải lên: 07/08/2014, 03:22

... zones of sympatry (codes are listed in Tab. II). Crosses are plotted at the coordinates of the four phenotypes in the first two dimension of the SCA (the first number in the brackets represent the ... depend on the damaging degree of the seed lot. We chose to conduct the test on in- tact samaras (seeds within the fruit), first because we wanted to know the abil...

Ngày tải lên: 07/08/2014, 16:20

... which the test statistics exceeded at the 5% significance level were deemed to contribute significantly to the variance of a spectra. The choice of r–1 degrees of freedom in the numerator of the ... reduce the dimensions of the data with a minimum of information loss. It must accomplish this reduction without losing the ability to interpret the results. T...

Ngày tải lên: 08/08/2014, 01:22

... a liquid The next stage in these studies is the investigation of the microcosm (cell unit) to determine the part of the respiratory chain affected by the phytotoxins present ... factors, including the rigor- ous climate, predation of seeds and attack by fungi. Among these causes, the under- growth vegetation may have a phytotoxic effe...

Ngày tải lên: 09/08/2014, 04:20

... into the mechanism of frost resistance and susceptibility of PSII of P. canariensis needles to extracellular ice. The recuperation and survival capacity after frost damage of variable degrees of severity ... was fitted to the data using P-Fit software (Biosoft, Durham, USA). LT 50 –values, i.e., the temperature at 50% frost damage, can be read directly from the curve...

Ngày tải lên: 07/08/2014, 16:20

... that the anoma- lous value of the median is caused by the high pol- lution and the presence of humus in the uppermost mineral horizon in the area of the Pass. Pb content in the humus layer is therefore ... distinctness of the area around the Jablunkov Pass is confirmed by the evaluation of the data of forest nutrition survey. Particularly, it consists in...

Ngày tải lên: 07/08/2014, 10:21

... attribute from the aspect of the developmental stage of the virgin forest, we can state that the highest values were found out in the growth stage and according to the scale outlined by the authors ... 1999). By their help it is possible to add other hierarchical levels of the stand diversity. Selected indices for the description of structural diversity were...

Ngày tải lên: 07/08/2014, 10:22