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PODCAST

Medizin - Open Access LMU - Teil 05/22

Ludwig-Maximilians-Universität München

Die Universitätsbibliothek (UB) verfügt über ein umfangreiches Archiv an elektronischen Medien, das von Volltextsammlungen über Zeitungsarchive, Wörterbücher und Enzyklopädien bis hin zu ausführlichen Bibliographien und mehr als 1000 Datenbanken reicht. Auf iTunes U stellt die UB unter anderem eine Auswahl an elektronischen Publikationen der Wissenschaftlerinnen und Wissenschaftler an der LMU bereit. (Dies ist der 5. von 22 Teilen der Sammlung "Medizin - Open Access LMU".)

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Assessment of cancer risks due to ionizing radiations

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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Models of cellular radiation

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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Verfahren zur Unterfütterung von Stimmlippen

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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Neue Ergebnisse des experimentellen Trachealersatz...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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A low-voltage activated, transient calcium current is...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

Intracellular recordings were obtained from rat neocortical neurons in vitro. The current-voltage-relationship of the neuronal membrane was investigated using current- and single-electrode-voltage-clamp techniques. Within the potential range up to 25 mV positive to the resting membrane potential (RMP: –75 to –80 mV) the steady state slope resistance increased with depolarization (i.e. steady state inward rectification in depolarizing direction). Replacement of extracellular NaCl with an equimolar

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Function and distribution of three types of...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

1. The nature, distribution and function of rectifying channels in rat spinal root myelinated axons has been assessed with selective blocking agents and a variety of intracellular and extracellular recording techniques. 2. The electrotonic responses of roots poisoned with tetrodotoxin (TTX) to constant current pulses had fast (rise time much less than 1 ms) and slow components, which were interpreted in terms of Barrett & Barrett's (1982) revised cable model for myelinated nerve. Depolarization

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Baseline and stimulated ANF plasma levels

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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Alloplastischer Trachealersatz

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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Characteristics of long-duration inhibitory...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

1. The characteristics of long-duration inhibitory postsynaptic potentials (l-IPSPs) which are evoked in rat frontal neocortical neurons by local electrical stimulation were investigated with intracellular recordings from anin vitro slice preparation. 2. Stimulation with suprathreshold intensities evoked l-IPSPs with typical durations of 600–900 msec at resting membrane potential. Conductance increases of 15–60% were measured at the peak amplitude of l-IPSPs (150–250 msec poststimulus). 3.

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Atrial natriuretic factor

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

The discovery of the first well-defined natriuretic hormone, the Atrial Natriuretic Factor (ANF), has prompted research on its impact on volume regulation in health and disease. The natriuretic, diuretic, and smooth muscle-relaxing properties suggest an important role of this novel hormone in pathophysiological states with sodium or volume retention, such as congestive heart failure or cirrhosis of the liver. Investigations on the implications of ANF in liver disease have been performed for little

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Differential processing of plasma-ANF in...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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Diagnostische Maßnahmen bei Aszites

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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Neuere Aspekte in Diagnose und Therapie des Aszites

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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Cellular mechanisms of potassium homeostasis in the...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

Double-barrelled ion-sensitive microelectrodes were used to measure changes in the intracellular activities of K+, Na+, and Cl- (aKi, aNai, aCli) in neurones of rat sympathetic ganglia and in glial cells of slices from guinea-pig olfactory cortex. In sympathetic neurones, carbachol and gamma-aminobutyric acid (GABA) produced a reversible decrease of aKi. The decrease of aKi during carbachol was accompanied by a rise of aNai, whereas in the presence of GABA decreases of aKi and aCli were seen. The

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Ion activities and potassium uptake mechanisms of...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

1. Double-barrelled ion-sensitive micro-electrodes were used to measure changes in the intracellular activities of K+, Na+ and Cl- (aiK, aiNa, aiCl) in glial cells of slices from guinea-pig olfactory cortex during repetitive stimulation of the lateral olfactory tract. 2. Base-line levels of aiK, aiNa and aiCl were about 66, 25 and 6 mM, respectively, for cells with resting potentials higher than -80 mV. During stimulation, intraglial aiK and aiCl increased, whereas aiNa decreased. Within about 2 min

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Evidence for a magnesium-insensitive membrane...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

The responses of rat neocortical neurons in vitro to iontophoretically applied N-methyl-d-aspartate (NMDA) were investigated by means of intracellular recording in the presence and absence of extracellular magnesium ions (Mg2+). At Mg2+-concentrations of 1.3 mM the neurons responded with a depolarization accompanied by an increase in membrane resistance. Upon removal of Mg2+ the NMDA-induced depolarization was markedly potentiated. However, even in neurons recorded from slices which were incubated

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Absence of a dose-rate effect in the transformation...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

The findings of Hill et al. (1984) on the greatly enhanced transformation frequencies at very low dose rates of fission neutrons induced us to perform an analogous study with -particles at comparable dose rates. Transformation frequencies were determined with γ-rays at high dose rate (0·5 Gy/min), and with -particles at high (0·2 Gy/min) and at low dose rates (0·83-2·5 mGy/min) in the C3H 10T1/2 cell system. α-particles were substantially more effective than γ-rays, both for cell inactivation and

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Baclofen reduces post-synaptic potentials of rat...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

1. Intracellular recordings were obtained from neurones in layers 2 and 3 of the rat frontal neocortex in an in vitro slice preparation. Three distinct types of stimulation-evoked post-synaptic potentials were recorded in these neurones: excitatory post-synaptic potentials (e.p.s.p.s); bicuculline-sensitive, chloride-dependent inhibitory post-synaptic potentials (i.p.s.p.s) with times to peak of 20-25 ms (fast(f)-i.p.s.p.s); bicuculline-insensitive, potassium-dependent i.p.s.p.s with

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Korrektur von Gesichtsschädeldefekten

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

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Adynamia episodica hereditaria with myotonia: A...

Medizin - Open Access LMU - Teil 05/22 ·

1987/01/01

To study the mechanism of periodic paralysis, we investigated the properties of intact muscle fibers biopsied from a patient who had adynamia episodica hereditaria with electromyographic signs of myotonia. When the potassium concentration in the extracellular medium, [K]e, was 3.5 mmol/l, force of contraction, membrane resting potential, and intracellular sodium activity were normal, but depolarizing voltage clamp steps revealed the existence of an abnormal inward current. This current was activated

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