66 research outputs found
Analysis and calibration of absorptive images of Bose-Einstein condensate at non-zero temperatures
We describe the method allowing quantitative interpretation of absorptive
images of mixtures of BEC and thermal atoms which reduces possible systematic
errors associated with evaluation of the contribution of each fraction. By
using known temperature dependence of the BEC fraction, the analysis allows
precise calibration of the fitting results. The developed method is verified in
two different measurements and compares well with theoretical calculations and
with measurements performed by another group.Comment: 17 pages, 8 figure
Free-fall expansion of finite-temperature Bose-Einstein condensed gas in the non Thomas-Fermi regime
We report on our study of the free-fall expansion of a finite-temperature
Bose-Einstein condensed cloud of 87Rb. The experiments are performed with a
variable total number of atoms while keeping constant the number of atoms in
the condensate. The results provide evidence that the BEC dynamics depends on
the interaction with thermal fraction. In particular, they provide experimental
evidence that thermal cloud compresses the condensate.Comment: 8 pages, 4 figure
Assessment of the present state of occurrence, threats and protection of Fomitopsis officinalis (Vill.: Fr.) Bond. and Sing. in Poland
The Fomitopsis officinalis is the fungus remaining under strict protection since 1983. It is on the Red List of threatened fungi in Poland in the category of species endangered by extinction (E). It is also in the group of 33 threatened species proposed to be embraced by species protection at European level. All the existing localities of this species in Poland are in the area of its historical occurrence in the territory of the
Świętokrzyskie and Mazowieckie provinces. In 2010, the presence of F. officinalis was detected in four seed trees in the managed larch forests in the neighbourhood of the ‘Ciechostowice’ Reserve (Skarżysko Forest District). Moreover, a new tree with fruiting bodies was found in each of the ‘Ciechostowice’ and ‘Modrzewina’ reserves. Recent data show that the fungus has infested 31 trees or parts of trees (trees with visible or just disappeared fruiting bodies). There is still a need to protect habitats and populations of F. officinalis using the passive and active protection methods
Wyniki szczepienia pniaków bukowych (Fagus sylvatica L.) i dębowych (Quercus sp.) grzybnią boczniaka ostrygowatego (Pleurotus ostreatus [Jacq.: Fr.] Kumm.)
The article presents the results of inoculation of beech and oak stumps with a biological preparation of
oyster fungus (Pleurotus ostreatus) mycelium. The inoculum was grown on a sawdust substrate at Warsaw
University of Life Sciences Department of Mycology and Forest Phytopathology. The experiment was set up
at the Forest Experimental Station in Rogów. Stumps were inoculated: i) immediately after tree felling or ii) at
approximately 5 and 12 months after felling. A total of 60 beech stumps and 50 oak stumps were inoculated in
the years 2002– 2004. The infected stumps were then inspected for the presence of the mycelium and fruiting
bodies of P. ostreatus. The presence of fruiting bodies of other wood-decaying fungi was also noted. The extent
of rotting was determined macroscopically, with the causal agent being confirmed on the basis of isolation
and identification of mycelium from fragments of colonized wood obtained from rooted-out stumps. Oyster
fungus mycelium was found to colonise beech stumps much more effectively than oak stumps. Stumps inoculated
immediately after, or five months after felling were more effectively colonized by the mycelium than those
inoculated after one year.Zbadano możliwości wykorzystania boczniaka ostrygowatego (Pleurotus ostreatus) do
szczepienia pniakow bukowych i dębowych w celu ograniczania bazy pokarmowej opieniek
(Armillaria spp.). Biopreparat na podłożu trocinowym przygotowano w Zakładzie
Mikologii i Fitopatologii Leśnej SGGW w Warszawie. Doświadczenie założono na 5 powierzchniach,
na siedlisku LMśw, w Nadleśnictwie Rogow. Na wszystkich powierzchniach
przed założeniem doświadczenia obserwowano występowanie objawów opieńkowej
zgnilizny korzeni. Inokulowano pniaki powstałe zaraz po ścięciu drzew oraz ok. 5-
i 12-miesięczne. W sumie, w latach 2002– 2004, zaszczepiono 60 pniaków bukowych i 50
dębowych. Na zainfekowanych pniakach oceniano występowanie grzybni i owocników
boczniaka ostrygowatego oraz obecność innych gatunków grzybów wielkoowocnikowych.
Makroskopowo określano zasięg widocznej zgnilizny i potwierdzano sprawcę (Pleurotus
ostreatus) poprzez izolację i identyfikację grzybni z fragmentów drewna wykarczowanych
trzech pniaków bukowych i trzech dębowych. Stwierdzono, że grzybnia boczniaka ostrygowatego
znacznie skuteczniej kolonizowała pniaki bukowe niż dębowe. Pniaki powstałe
zaraz po ścięciu drzewa oraz 5-miesięczne były efektywniej zasiedlane przez grzybnię
boczniaka niż pniaki inokulowane po roku od momentu ich powstania. W trakcie trwania
doświadczenia na szczepionych pniakach bukowych odnotowano owocniki 19 gatunków
grzybów wielkoowocnikowych, a na pniakach dębowych 16 gatunków. Pniaki bukowe
najliczniej były kolonizowane przez Bjerkandera adusta i Trametes versicolor, natomiast
pniaki dębowe przez Stereum hirsutum
Data for: Determination of the C(3)^{1}\Sigma^{+} state potential energy curve in KCs molecule based on polarisation labelling spectroscopy data
The experimental Dunham coefficients and potential energy curve for the C(3)1Sigma+ state
of the KCs molecule. Set of experimental energies E (in cm-1) of the observed rovibrational levels
in the C(3)1Sigma+ state
Biology and medicinal properties of the chaga mushroom Inonotus obliquus (Fr.) Pilat
Based on the literature and own studies, the biology and ecology of the fungus Inonotus obliquus (Fr.) Pilát as well as medicinal properties and practical application of its products were discussed
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