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Start Over Coverage 312-316

1. Apodemodex cornutus gen. n. et sp. n. (Acari: Demodecidae): new genus and new species of the hair follicle mite from the Mediterranean water shrew, Neomys anomalus (Insectivora: Soricidae)

Creator:
Bukva, Vladimír
Format:
print
Type:
model:internalpart and TEXT
Subject:
Acari, Demodecidae, morphology, new genus, new species, parasite, and insectivore
Language:
English
Description:
A new hair follicle mite species, Apodemodex cumulus, is described from female and male specimens collected from the muzzle, lower jaw and vertex of Mediterranean water shrews, Neomys anomalus Cabrera taken in South Bohemia, Czech Republic. A new, at present monotypie genus Apodemodex is erected for this mite species. Diagnostic for the new genus are the morphology of the gnathosoma (the characters including conspicuous continuous arched antero-lateral contours of massive ventral face) and the morphology of the leg claws, which are deeply bifurcate and without spur.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Effect of repeated infestations of BALB/c mice with Ixodes ricinus nymphs on tick-borne encephalitis virus infection

Creator:
Dusbábek, F., Kopecký, J., and Uhlíř, J.
Format:
print
Type:
model:internalpart and TEXT
Subject:
Tick-borne encephalitis virus, virus transmission, Ixodes ricinus nymphs, and immunosuppression
Language:
English
Description:
The effect of repeated infestations of BALB/c mice with Ixodes ricinus (L.) nymphs on tick borne encephalitis (TBE) virus infection was studied. Enhancement of nymphal feeding, occurring in noninfected mice during the quaternary infestations, was less apparent or absent in female nymphs engorged on TBE virus infected mice. The mice infected with TBE virus during quaternary tick infestation survived significantly longer (P < 0.01) than mice infected with TBE virus during the primary tick infestation. The mean titre of virus in murine blood (determined by plaque assay) was significantly lower (P < 0.01) and the number of nymphs acquiring virus was reduced (P < 0.05) when feeding on hosts infected during the quaternary infestation. The results indicate that repeated infestations of I. ricinus nymphs on BALB/c mice, although enhancing tick feeding, reduced infection with TBE virus when inoculated intraperitoneally.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Měření spektra svíticí diody pomocí interferenční spektroskopie

Creator:
Pavlíček, Pavel and Hýbl, Ondřej
Format:
bez média and svazek
Type:
model:article and TEXT
Language:
Czech
Description:
The article describes the measurement of spectrum of a luminescent diode by means of interference spectroscopy. The form of the spectral density is determined from the measured autocorrelation function. The autocorrelation function is measured by means of Michelson interferometer. Basic relations for the calculation of spectral density from the measured autocorrelation function are derived. The focus of the article is concentrated on the correct setting of sampling parameters of the interference spectrometer.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Nanolitografie a kompenzace magnetického pole v prostředí s průmyslovým rušením

Creator:
Kolařík, Vladimír, Matějka, František, Horáček, Miroslav, Matějka, Milan, and Urbánek, Michal
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
E-beam writer with a shaped beam, magnetic field cancelling system, electron optics column, nanolithography, nanotechnology, elektronový litograf s tvarovaným svazkem, systém pro aktivní kompenzaci magnetického pole, elektronově-optická soustava, nanolitografie, and nanotechnologie
Language:
Czech
Description:
The paper describes the results achieved by electron beam lithography when using an electron beam writer BS 600. The impacts of interference that are common in industrial areas are discussed. Electromagnetic field in the critical place i.e. along an electron beam axis is considered to be the predominant source of disturbances. An installation of a magnetic field cancelling system is described. The best resolution achievable in both cases (the magnetic field cancelling system being on or off) are presented. It is supposed that the results and experience described herein would be helpful when new laboratories and operations for nanotechnologies will be designed and built. and Příspěvek se zabývá výsledky dosaženými při litografických operacích s využitím elektronového litografu BS 600. Článek diskutuje zejména vliv rušení v běžném průmyslovém prostředí na parametry dosažitelné při tomto způsobu litografie. Za převažující rušivý projev je považováno proměnlivé elektromagnetické pole v kritické oblasti, tedy podél osy elektronového svazku zapisovacího zařízení. Prezentovány jsou mezní parametry realizovaných struktur ve dvou případech, jednak při dosavadním běžném uspořádání a jednak při využití systému pro aktivní kompenzaci magnetického pole. Autoři se domnívají, že zkušenosti a výsledky popsané v tomto příspěvku mohou významným způsobem pomoci při budování vědeckých i průmyslových laboratoří či provozů se zaměřením na litografii, mikroskopii i technologie obecně, a to při práci s objekty o rozměrech pod 100 nanometrů.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5. Physiological comparisons of true leaves and phyllodes in Acacia mangium seedlings

Creator:
Yu, H. and Li, J.-T.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
apparent quantum yield, chlorophyll content and fluorescence, dark respiration rate, growth, net assimilation rate, net photosynthetic rate, relative growth rate, stomatal conductance, and transpiration rate
Language:
Multiple languages
Description:
We found differences between true leaves (TL) and phyllodes (Ph) during ontogeny of Acacia mangium plants as reflected in chlorophyll (Chl) and carotenoid contents, gas exchange, Chl fluorescence, and growth. The production of TL enhanced the relative growth rate of the A. mangium seedlings, allowing the plants to accumulate enough dry biomass for later growth, while the production of thicker Ph in the later growth stage of A. mangium could help plants to cope with higher irradiance in their natural growth conditions. and H. Yu, J.-T. Li.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

6. Použití dvousondové diagnostiky při měření vlastností plazmatu v nestandardních systémech

Creator:
Wild, Jan, Kudrna, Pavel, and Tichý, Milan
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
fyzika plazmatu, plasma physics, 6, and 53
Language:
Czech
Description:
We explain the measurement principles using a pair of Langmuir probes for the diagnostics of uncommon plasmas. The possibilities of the system will be shown using examples of the model flame and the plasma created by the interaction of extreme ultraviolet (XUV) laser with solids. The importance of contemporary data processing techniques supporting traditional methods will be also demonstrated., Vysvětlíme, jak funguje dvojice Langmuirových sond pro diagnostiku ne zcela běžného plazmatu. Její možnost demonstrujeme při experimentech s modelovým plamenem a plazmatem vznikajícím interakcí fokusovaného extrémního ultrafialového (XUV) laserového svazku s pevnou látkou. Ukážeme, jak bylo s pomocí soudobé techniky sběru a zpracování dat možné z obou studovaných systémů získat základní informace o plazmatu, tj. o teplotě a hustotě nabitých částic v něm., Jan Wild, Pavel Kudrna, Milan Tichý., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

7. The photosynthetic performance of sterile and fertile sporophytes in a natural population of the fern Dryopteris affinis

Creator:
Paoli, L. and Landi, M.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
botanika, botany, chlorophyll fluorescence induction, JIP-test, Mediterranean area, performance index, photosynthesis, pteridophytes, 2, and 58
Language:
Multiple languages
Description:
We studied the photosynthetic performance of sterile and fertile sporophytes in a natural population of the fern Dryopteris affinis growing within a riparian forest (Central Italy) using chlorophyll (Chl) a fluorescence transients, the OJIP phase, where O is for the minimum fluorescence, P is for the peak (the maximum), and J and I are inflections. The “vitality” of the samples was assessed by the maximum quantum yield of primary photochemistry obtained indirectly from the fluorescence data (Fv/Fm); in the same way, the so-called performance index (PIABS) was obtained from fluorescence data. The photosynthetic performance (inferred from PIABS) of D. affinis changed significantly with the seasonal development of the fronds. The highest photosynthetic performance was recorded in the summer, corresponding to the period of spore release. The photosynthetic performance decreased in the winter, down to the minimal values of senescent fronds reached at the end of the seasonal cycle (May-June). On the whole, during the seasonal development, sterile and fertile fronds had a similar photosynthetic behaviour, as inferred from fluorescence data. At the end of spore maturation and dispersal (September-October), the fertile fronds showed somewhat lower photosynthetic performance than the sterile fronds, as revealed by PIABS. Being a long-lived fern, confined to humid and undisturbed sites in the Mediterranean, D. affinis deserves to be further investigated as a potential indicator of ecological continuity in Mediterranean riparian forests., L. Paoli, M. Landi., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public