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4672. Examples of rotational component records of mining induced seismic events from the Karviná region

Creator:
Zdeněk Kaláb and Jaromír Knejzlík
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Geologie. Meteorologie. Klimatologie, seizmicita, seismicity, rotational component, rotational seismometer, mining induced seismicity, 7, and 551
Language:
English
Description:
Russian electrodynamic seismometer named S-5-S is adaptable for measurement of rotational ground motion. In this paper brief information about mentioned adaptation is presented. Initial results from experimental m easurement in Karviná region in 2011 with high mining induced seismicity are documented. Measured values for the horizontal component reached up to 1 mrad s-1 , while the seismic energy of these events did not exceed the value of 10 5 J and hypocentral distances were within 2 km., Zdeněk Kaláb and Jaromír Knejzlík., and Obsahuje bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4673. Excelence spojuje: stipendia nadace Alexandra von Humboldta

Creator:
Pacltová, Markéta
Format:
print
Type:
article, články, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, intelektuální spolupráce, stipendia, mezinárodní spolupráce, intellectual cooperation, international cooperation, scholarships, 12, and 00
Language:
Czech
Description:
Markéta Pacltová.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

4675. Excerpta z vídeňských časopisů jako pramen k dějinám kultury v Čechach v předbřeznovém období

Creator:
Vlasta Reittererová and Hubert Reitterer
Format:
print
Type:
article, zprávy, reports, model:article, and TEXT
Subject:
dějiny hudby, hudební život, muzikologie, periodika, history of music, musical life, musicology, periodicals, 78.01, (048.8), 78(091), 050+070.48, and 78-027.22
Language:
Czech
Description:
Zpráva informuje o práci Gertraud Marinelli-Königové a její připravované publikace o reflexi českého kulturního života ve vídeňských periodikách v letech 1805-1848., Vlasta Reittererová, Hubert Reitterer., and Rubrika: Informatorium
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4676. Excess of free fatty acids as a cause of metabolic dysfunction in skeletal muscle

Creator:
Jana Tůmová, Michal Anděl, and Jan Trnka
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, obezita, inzulinová rezistence, obesity, insulin resistance, free fatty acids, skeletal muscle, mitochondrial function, 14, and 612
Language:
English
Description:
Obesity is often associated with metabolic impairments in peripheral tissues. Evidence suggests an excess of free fatty acids (FFA) as one factor linking obesity and related pathological conditions and the impact of FFA overload on skeletal muscle metabolism is described herein. Obesity is associated with dysfunctional adipose tissue unable to buffer the flux of dietary lipids. Resulting increased levels and fluxes of plasma FFA lead to ectopic lipid deposition and lipotoxicity. FFA accumulated in skeletal muscle are associated with insulin resistance and overall cellular dysfunction. Mechanisms supposed to be involved in these conditions include the Randle cycle, intracellular accumulation of lipid metabolites, inflammation and mitochondrial dysfunction or mitochondrial stress. These mechanisms are described and discussed in the view of current experimental evidence with an emphasis on conflicting theories of decreased vs. increased mitochondrial fat oxidation associated with lipid overload. Since different types of FFA may induce diverse metabolic responses in skeletal muscle cells, this review also focuses on cellular mechanisms underlying the different action of saturated and unsaturated FFA., J. Tumova, M. Andel, J. Trnka., and Obsahuje bibliografii
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

4677. Excessive oxygen uptake during exercise and recovery in heavy exercise

Creator:
Yano, T., Yunoki, T., Matsuura, R., Arimitsu, T., and Kimura, T.
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, experimentální fyziologie, kyslík, experimental physiology, oxygen, excessive oxygen uptake, time constant, heavy exercise, moderate excercise, 14, and 612
Language:
English
Description:
The aim of this study was to determine whether excessive oxygen uptake (V.o2) occurs not only during exercise but also during recovery after heavy exercise. After previous exercise at zero watts for 4 min, the main exercise was performed for 10 min. Then recovery exercise at zero watts was performed for 10 min. The main exercises were moderate and heavy exercises at exercise intensities of 40 % and 70 % of peak V.o2, respectively. V.o2 kinetics above zero watts was obtained by subtracting V.o2 at zero watts of previous exercise (ΔV.o2). ΔV.o2 in moderate exercise was multiplied by the ratio of power output performed in moderate and heavy exercises so as to estimate the ΔV.o2 applicable to heavy exercise. The difference between ΔV.o2 in heavy exercise and ΔV.o2 estimated from the value of moderate exercise was obtained. The obtained V.o2 was defined as excessive V.o2. The time constant of excessive V.o2 during exercise (1.88±0.70 min) was significantly shorter than that during recovery (9.61±6.92 min). Thus, there was excessive V.o2 during recovery from heavy exercise, suggesting that O2/ATP ratio becomes high after a time delay in heavy exercise and the high ratio continues until recovery., T. Zano, T. Yunoki, R. Matsuura, T. Arimitsu, T. Kimura., and Obsahuje bibliografii a bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4678. Excitability changes of cortical neurons during the postnatal period in rats exposed to prenatal hypobaric hypoxia

Creator:
Dana Marešová, Valkounová, I., Kateřina Jandová, Jana Bortelová, and Stanislav Trojan
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, hypoxie, hypoxia, development, excitability of neurons, rats, 14, and 612
Language:
English
Description:
Pregnant rats were exposed to intermittent hypobaric hypoxia (at a simulated altitude of 7000 m or 5000 m) and the excitability of cortical neurons of their pups was tested. Stimulation of the sensorimotor cortex of rats prenatally exposed to hypoxia shortened the duration of cortical afterdischarges in 12-day-old rats, but did not change the excitability in 25-day-old animals. Shortening of the first afterdischarge in 35-day-old rats but the prolongation of the first afterdischarge in adult rats (as compared to the duration of cortical afterdischarges in rats not exposed to prenatal hypoxia) were registered. The possible mechanisms of different excitability of cortical neurons in rats prenatally exposed to hypobaric hypoxia are discussed., D. Marešová, I. Valkounová, K. Jandová, J. Bortelová, S. Trojan., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4679. Excitation-contraction coupling and excitation-transcription coupling in blood vessels: their possible interactions in hypertensive vascular remodeling

Creator:
Misárková, E., Michal Behuliak, Bencze, M., and Josef Zicha
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, fyziologie, physiology, vascular smooth muscle cells, contractile VSMC phenotype, proliferative VSMC phenotype, Cell Ca2+ handling, intracellular signaling pathways, 14, and 612
Language:
English
Description:
Vascular smooth muscle cells (VSMC) display considerable phenotype plasticity which can be studied in vivo on vascular remodeling which occurs during acute or chronic vascular injury. In differentiated cells, which represent contractile phenotype, there are characteristic rapid transient changes of intracellular Ca2+ concentration ([Ca2+]i), while the resting cytosolic [Ca2+]i concentration is low. It is mainly caused by two components of the Ca2+ signaling pathways: Ca2+ entry via L-type voltagedependent Ca2+ channels and dynamic involvement of intracellular stores. Proliferative VSMC phenotype is characterized by long-lasting [Ca2+]i oscillations accompanied by sustained elevation of basal [Ca2+]i. During the switch from contractile to proliferative phenotype there is a general transition from voltagedependent Ca2+ entry to voltage-independent Ca2+ entry into the cell. These changes are due to the altered gene expression which is dependent on specific transcription factors activated by various stimuli. It is an open question whether abnormal VSMC phenotype reported in rats with genetic hypertension (such as spontaneously hypertensive rats) might be partially caused by a shift from contractile to proliferative VSMC phenotype., E. Misárková, M. Behuliak, M. Bencze, J. Zicha., and Obsahuje bibliografii
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

4680. Excitotoxicity of Lathyrus sativus neurotoxin in leech retzius neurons

Creator:
Cemerikic, D., Nedeljkov, V., Lopicic, S., Dragovic, S., and Beleslin, B.
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, fyziologie, physiology, input membrane resistance, intracellular Ca2+ concentration, intracellular Na+ and K+ activities, Lathyrus sativus excitotoxicity, leech retzius neurons, 14, and 612
Language:
English
Description:
The effects of Lathyrus sativus neurotoxin were studied on the cell membrane potential and cellular cation composition in Retzius nerve cells of the leech Haemopis sanguisuga, with ion-selective microelectrodes using liquid ion-exchangers. Bath application of 10-4 mol/l Lathyrus sativus neurotoxin for 3 min depolarized the cell membrane potential and decreased the input resistance of directly polarized membrane in Retzius neurons. At the same time the cellular Na+ activity increased and cellular K+ activity decreased with slow but complete recovery, while the intracellular Ca2+ concentration was not changed. Na+-free Ringer solutions inhibited the depolarizing effect of the neurotoxin on the cell membrane potential. Zero-Ca2+ Ringer solution or Ni2+-Ringer solution had no influence on the depolarizing effect of the neurotoxin on the cell membrane potential. It is obvious that the increase in membrane conductance and depolarization of the cell membrane potential are due to an influx of Na+ into the cell accompanied by an efflux of K+ from the cell., D. Cemerikić, V. Nedeljkov, S. Lopičić, S. Dragović, B. Beleslin., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

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