The complex environmental research (hydrology, vegetation, soils and ground water) has been carried out in nature reserves, located on the Danube banks within the zone of broad-leaved forests in Germany. Under comparison were terrestrial ecosystems along the regulated and natural rivers. It was established that the weirs, dams with low head of water and small artificial reservoirs affects upon the vegetation and soils of floodplains to be manifested some decades later. A comprehensive analysis of trends in mean annual water level, water flow and the precipitation for the long period revealed the significant influence of natural long-term variability of the water content on the vegetation dynamics in floodplains. The methods, suggested by the authors made possible to assess the after-effects upon floodplain ecosystems due to changes in the river flow regime caused by different hydrotechnical constructions. and V prírodných rezerváciách v blízkosti Dunaja (v Nemecku) v oblasti pokrytej listnatými lesmi bol vykonaný komplexný environmentálny výskum (hydrológia, vegetácia, pôdy a podzemné vody). Porovnávali sa ekosystémy pozdĺž regulovaných a prirodzených tokov. Zistilo sa, že hate a priehrady s relatívne malým vzdutím, ako aj malé vodné nádrže ovplyvňovali vegetáciu a pôdy v záplavových územiach tak, že sa to prejavilo už o niekoľko desaťročí neskôr. Vyčerpávajúca analýza trendov priemernej ročnej výšky hladín, prietokov a zrážok počas dlhého obdobia pomohla objasniť významný vplyv prirodzenej dlhodobej variability obsahu vody na dynamiku vegetácie v zátopových územiach. Metóda navrhnutá autormi umožňuje určiť následné vplyvy zmien vodného režimu tokov spôsobených hydrotechnickými stavbami na ekosystém v záplavovom území.
Dieser Beitrag ist der Sprache der Angehörigen der ältesten Generationen und den Besonderheiten ihrer Kommunikation mit den jüngeren Generationen gewidmet. Die Forschung stützt sich auf die Analyse der Tonbandaufnahmen, die die Erzählungen von alten Menschen (zumeist an jüngere Zuhörer gewendet) festhalten: sie erzählen ihren jungen Verwandten von ihrer Kindheit, Jugend und weiteren Etappen ihres Lebens. Die Analyse ist auf den Wortschatz dieser Erzählungen (z. B. auf die grosse Gruppe der Germanismen. Mittel der Bewertung usw.). auf den Vergleich der Vergangenheit und der Gegenwart, auf das Ausdrücken der Zeitangaben, auf den Kampf der alten Erzähler mit dem Gedächtnis und auf die Erklärungen der Ausdrücken, die die jüngeren Zuhörer nicht verstehen, gerichtet. Unsere Absicht ist, ein anschauliches Bild dessen zu vermitteln, was für ein Tschechisch die ältesten Generationen benutzen, wie sie erzählen und den Dialog führen, und welche Welt mit diesen Generationen untergeht (d.h. welche Ansichten. Einstellungen, Überzeugungen, Moral und zwischenmenschliche Beziehungen).
Seven species of the genus Trichodina Ehrenberg, 1838 were identified during a sampling programme of twenty freshwater fish species from approximately sixty sites in Scotland, England and Wales. Species found include: Trichodina acuta Lom, 1961 from Cyprinus carpio L., Carassius auralus L., Oncorhynchus mykiss (Walbaum), Salmo trutta L. and Phoxinus phoxinus L.; Trichodina domerguei Wallengren, 1897 from Gasterosteus aculeatuir L.; Trichodina tenuidens Faurc-Fremiet, 1944 from Gasterosteus aculeatus; Trichodina pediculus Ehrenberg, 1838 from Gasterosteus aculeatus; Trichodina modesta Lom, 1970 from Abramis brama L.; Trichodina nigra Lom, 1960 from Cyprinus carpio, Salmo trutta and Oncorhynchus mykiss', and Trichodina intermedia Lom, 1960 from Phoxinus phoxinus. Morphological variation within and between host populations and host specificity of the Trichodina species recovered are described.
Like the music of other nations, Irish traditional instrumental music too is being spread across the whole world through the mass-media and the recording Industry. There are certain differences between stage performances and traditional playing in its natural milieu though. The dance function of the music was becoming redundant in recent decades and a concert form of playing replaced the role of the house dancing accompaniment. The fact that Irish traditional music has developed up to the present day is being stimulated by the phenomenon of Irish musical session, an association of musicians gathered to play tunes (short melodies), mainly of dance music character. Irish sessions have its own rules, etiquette and controlling factors. According to this rules the session leader, being the musician with the highest status among the others, starts each set of tunes, sets the pace and rhythm of music. The music making of this kind appeared in Irish traditional music quite recently, especially thanks to musicians from the Irish diaspora that lived in North America and in the industrial towns of the Great Britain. From these places the post-WW2 phenomenon of Irish traditional music sessions gradually expanded to the Irish communities ali around the world. Of great importance for the next development and contemporary form of traditional Irish music were the musicians that came out of the Irish emigrants in the United States. In the 1930s it was Paddy Killoran, James Morrison and Michael Coleman, all living in New York, whose musical styles were often imitated. It was the beginning of great changes in the local musical styles in Ireland: under the influence of the personal styles of these famous fiddlers, originally from County Sligo, the local musicians tried to imitate this grandiose interpretation in their own playing. Thus gradually the differences between local styles are disappearing. This trend is stronger with the development of the musical industry. Even though some of the interpreters are afraid that through the weakening of the local music styles Irish traditional music looses its enchantment (draiocht), others consider the contemporary development being a proof of the fact that also in the future Irish traditional music will stay a live phenomenon and not a conserved manifestation of „folklorism“.
In the 1991 census, 1 360 000 inhabitants of the Czechoslovak Federative Republic claimed Moravian nationality. Even though the interest of general public in the problem of ethnic Moravian identity had lost strength considerably, it has been disputed until today how to interpret this fact appropriately. The author makes an effort to prove, through historical recapitulation of recent attempts to constitute the new ethnicalnational identity of one part of the Moravian inhabitants, that the making of the specifically Moravian national ideology is related only to the spontaneous unfolding of civic activism since the end of the year 1989. On the basis of the analysis of both specialized studies and works of partakers active in the emancipation movements themselves, he focuses on the historical background of the idea of distinctive nationality of Moravians and the subsequent typology of indentifications of the inhabitants of Moravia. For the first half of the 1990s there could be stated the existence of three dominant tendencies in the ways of collective identification of the population of Moravia. In the first case it is the declaration of the existence of peculiar Moravian nation, in the second one the acknowledgment to the „peculiar cultural and historical branch of the Czech nation“. The adherents of the last, third standpoint have no problems to identify, in spite of their Moravian heritage, as Czechs without further attributes. The effort to constitute a distinctive „Moravian nation“ is in this study being interpreted as an example of the conviction that for the entrenchment of peculiar ethnical conciousness it is not crucial the „objective“ existence of specific cultural patterns, but the implementation of peculiar ideological system. Under conditions of Moravian national identification we are thus confronted with the idea that even in case of the absence of „natural“ aggregates of specific cultural facts it is possible to attempt to construct peculiar national collectiveness. The confidence in the reality of ethnic peculiarity than becomes the matter of the inerpretation of the everyday reality. In the context of other ethnoregional movements the existence of the phenomenon of ethnic Moravian identity can be perceived as the mobilization of identity of peripheral community with many nativist traits. Even though it might seem that the adherents of the idea of the existence of peculiar Moravian nation are seemingly loosing their significance lately, it can be supposed that the efforts in its paradigmatic construction and social establishment will continue also in the future.
Oxygen can afFect the photosynthetic processes in two antagonistic (protective and destructive) ways. The protection is represented by draining off of the electron transport systém, by utilisation of NADPH and ATP, and production of carbon dioxide in the process of photorespiration, oxygen reduction in the Mehler reaction, and also by regeneration of monodehydroascorbate, one of the fmal products of the Mehler-peroxidase reaction. The subsequent building up of the proton gradient in the Mehler and Mehler-peroxidase reactions also helps protéct the photosynthetic apparatus. The production of harmful oxygen radicals is accompanied by the Mehler reaction. This is in contrast to the fact that the Mehler reaction can also protéct the photosynthetic apparatus. Nevertheless, the scavenging mechanisms in plants are efficient enough for protection against the active oxygen species. In some cases the disproportion between the production and scavenging of active oxygen can result in the destruction of thylakoid membrane. Singlet oxygen, another toxic form of oxygen, can also significantly increase the inhibition of photosynthesis in the presence of oxygen. None of these processes works alone or independently, they are in a dynamic equilibrium and each of them contributes to the regulation of photosynthesis.
Jednotlivci mají nesmírně velké systémy modálních znalostí a domněnek - systémy toho, co a je a co není možné, a systémy toho, co je a co není nutné. Takové individualizované systémy modálních znalostí a domněnek se nazývají "modálni světy." V tomto článku se ukazuje, že modalita plyne z kauzace, že modálni "implikace" a "vyplývání" je třeba chápat jako modálni determinovanost, že modálni slovesa nefungují sama o sobě, nýbrž zároveň s jinými prostředky, že modálni znalosti lze pojednat, že existují plochy modálni stability a že některé modálni znalosti jsou explicitní a jiné implicitní. Článek uzavírá návrhem reprezentace modálních znalostí a domněnek.