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9842. Taste Aversion Learning and Aging: A Comparison with the Effect of Dorsal Hippocampal Lesions in Rats

Creator:
Moron, I., Ballesteros, M.A., Candido, A., and Gallo, M.
Format:
print, bez média, and svazek
Type:
article, studie, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, fyziologie člověka, human physiology, Aging, Conditioned blocking, Hippocampal, Latent inhibition, Taste aversion learning, Rat, 14, and 612
Language:
English
Description:
The relationship between hippocampal function and aging was explored in Wistar rats using taste aversion learning by comparing the performance of adult dorsal hippocampal lesioned and fifteen-month-old intact rats with that of adult intact rats. In experiment 1 the conditioned blocking phenomenon was absent in the hippocampal and the aging rats. Unlike the adult intact rats, the hippocampal and aging rats were not impaired in acquiring a learned aversion to a cider vinegar solution (3 %) presented as a serial compound with a previously conditioned saccharin solution (0.1 %). In experiment 2 both the hippocampal and the aging rats developed reduced aversions to a saline solution (0.5 %) followed by an i.p. injection of lithium chloride (0.15 M; 2 % b.w.) if the taste solution was previously preexposed without consequences. This latent inhibition effect was similar to that seen in intact adult rats. In both experiments, the aging rats exhibited enhanced conventional learned taste aversions. It is concluded that aging is not a unitary process but induces both hippocampal dependent and hippocampal independent complex changes in the functioning of the neural circuits, implementing taste aversion learning., I. Moron, M.A. Ballesteros, A. Candido, M. Gallo., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

9845. Taxonomic problems, seasonality and histopathology of Henneguya creplini (Myxosporea) infection of the pikeperch Stizostedion lucioperca in Lake Balaton

Creator:
Molnár, Kálmán
Format:
print
Type:
model:internalpart and TEXT
Subject:
Henneguya creplini, Myxosporea, pikeperch, gills, development, and histopathology
Language:
English
Description:
Plasmodia of a Henneguya species measuring 70-900 pm and exhibiting season-dependent stages of development were detected throughout a three-year study on gill myxosporosis of Lake Balaton pikeperch (Stizostedion lucioperca (L.)). Sixty-five out of 160 fish (41%) examined in the period of study were infected by the parasite. Infection was the most prevalent (48%) among pikeperch specimens exceeding 40 cm in length. The highest prevalence of infection (58%) was recorded in 1995-1996 while the lowest (30%) in 1996-1997. The youngest plasmodia appeared in April, and started to develop within the capillaries of the secondary lamellae of the gill filaments. The round or ellipsoidal plasmodia which continued their gradual growth in the subsequent months of the year achieved a size of 800-900 pm by the late autumn months, but remained in intralamellar location throughout the developmental cycle. Mature spores developed in the plasmodia by the end of winter. On the basis of their shape and size, the spores were identified as Henneguya creplini (Gurley, 1894). However, because of the uncertain taxonomy of species assigned to the genus Henneguya the taxonomic position of the parasite requires further study. The host reaction consisting of epithelial proliferation and granulation tissue formation starts around the infected secondary lamella only after the maturation of spores and the disruption of plasmodia.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

9846. Taxonomické paradoxy v obrazu světa: (na příkladu etnokultury Těšínského Slezska)

Creator:
Kajfosz, Jan and Pokorný, Vít
Format:
print
Type:
model:internalpart and TEXT
Language:
Czech
Description:
This work deals with the worldview of autochtonous polish speaking ethnic group in Teschen Silesia inhabiting the area of both sides of current Czech-Polish border. It is importantfor our research that this ethnoculture maintains specific traditional traits, whether on the level of full meanings or of their symbolic sedimentation, which itself may serve as a source for reconstuction of these full meanings via structural-ermeneutical method. The analysis of narrative materials allows us to revealsome representative features of the researched worldview. By the notion of worldview we mean specific world description and world model (or pattern) as well. In our attempt to reconstruct a part of the worldview we aspire to show full potential of cognitive-linguistic analysis, taking note of both phenomenological and structural approaches. We understand the worldview notion as correlative to language and culture, and, on the other hand, as universal relative to man as bodily subject. We consider any worldview correlative to language and culture, alongside with being correlative to sensual human subject as well. This bilateral correlation is the source ofparadoxical nature of a worldview. Our research reveals that a worldview as a product of categorizing animal man makes reality simpler and stable on the one hand, but on the other hand can notget rid of it's own inconsistence and ambivalence. We attempt to prove that a worldview consists of a system for which general interpretation matrix can be found, but that this very system is equally confused, ambivalent, heterogeneous and includes multiple different layers. We also attempt to prove that cognitive structures specific for a member of the researched ethnoculture may occur outside this ethnoculture and that conlusions resulting from our analysis may have more general validity.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

9847. Techmania science center

Creator:
Kovandová, Monika
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
Techmania science center (projekt), Plzeň (Česko), Plzeň (Czechia), 6, and 53
Language:
Czech
Description:
Společnost Škoda Holding, a.s., a Západočeská univerzita v Plzni založily obecně prospěšnou společnost Regionální technické muzeum, o.p.s., se záměrem vybudovat v areálu průmyslového závodu Škoda v Plzni science center. and Monika Kovandová.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

9848. Techniques for isolating thermotolerant and pathogenic freeliving amebae

Creator:
Jonh, David T. and Howard, Marsha J.
Format:
print
Type:
model:internalpart and TEXT
Subject:
pathogenic freeliving amebae, environmental isolation, Acanthamoeba, Naegleria australiensis, and Naegleria fowleri
Language:
English
Description:
Several conditions of isolation were evaluated to determine which yielded the greatest number of thermotolerant and pathogenic freeliving amebae. Swab samples, easier to obtain and process, produced more pathogenic amebae than water samples. If water samples are required, 50-ml volumes gave the greatest percentage of pathogenic isolates. An incubating temperature of 42"C yielded the most thermotolerant amebae. A total of 11 pathogenic isolates were obtained from 762 environmental samples and were Acanthamoeba (55 %), Naegleria fowleri Carter, 1970 (27 %), and N. australiensis De Jonckheere, 1981(18%).
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

9849. Technologie LOCA v Centru výzkumu Řež s. r. o

Creator:
Březina, Martin, Rabochová, Michaela, and Mohyla, Roman
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
Centrum výzkumu Řež, jaderné havárie, nuclear accidents, 6, and 53
Language:
Czech
Description:
Článek představuje technologii LOCA, která byla vybudována v Centru výzkumu Řež s.r.o. (CVŘ) v rámci projektu SUSEN. Teoretický popis havárií jaderných elektráren umožňuje vysvětlit smysl testování a způsoby využití nové technologie LOCA jako nástroje při vývoji nových a spolehlivějších zařízení., Martin Březina, Michaela Rabochová, Roman Mohyla., and Obsahuje bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

9850. Tectonic pattern of the Hronov-Poříčí trough as seen from pole-dipole geoelectrical measurements

Creator:
Valenta, Jan, Vladimír Stejskal, and Štěpančíková, Petra
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Geologie. Meteorologie. Klimatologie, geomorfologie, geomorphology, Hronov (Česko : oblast), Hronov Region (Czechia), Hronov-Poříčí Trough, Hronov-Poříčí Fault Zone, electric resistivity measurements, normal faulting, 7, and 551
Language:
English
Description:
The Hronov-Poříčí Trough represents the easternmost part of the Trutnov-Náchod Depression. The NW-SE striking structure was formed due to the post-Cretaceous flexural folding and is filled with the Upper Cretaceous sediments. Both the NE and SW margins of the trough are bounded by flexures with the Upper Cretaceous strata dipping 40-60° towards the axis of the trough. The NE flexure is situated close to the parallel Hronov-Poříčí Fault Zone. Up to now, it is not fully known, in what extent the normal faulting was involved in the evolution of the structure. From the geomorphological point of view, the normal fault constraints of the trough seem to be acceptable, as the surface topography of its present margins exhibit many signs typical for fault scarps. However, the existence of a fault system bounding all round the Hronov-Poříčí Trough has not b een proved by any geological research. Hence the geophysical research was carried out on both sides of the NW part of the trough to support one of these hypothesis. Five geoelectrical profiles were measured in the area and the fault system was proved on the NE side of the trough. On the SW boundary the fault system was not found. Thus it seems, that the NE boundary is controlled by fault tectonics, whereas the SW boundary is rather formed by a simple flexure., Jan Valenta, Vladimír Stejskal and Petra Štěpančíková., and Obsahuje bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

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