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Σελίδα 1 από 43 Αποτελέσματα
Cesium-induced atrial tachycardia degenerating into atrial fibrillation in dogs: atrial torsades de pointes?
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BACKGROUND
In this study, we investigated whether the potassium channel blocker, cesium chloride (CsCl), which is capable of producing early after-depolarizations (EADs) and polymorphic ventricular tachyarrhythmias resembling torsades de pointes, might exert similar effects in the atria.
RESULTS
In
Low-intensity degenerate four-wave mixing at the cesium D1 resonance in thin cells.
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Σύνδεση εγγραφή
We observed low-intensity cw degenerate four-wave mixing at the D1 resonance in a 10-microm-thick cesium-vapor cell. Normal population depletion caused by optical pumping is alleviated by frequent atom-wall collisions. The reflectivity at the D1 resonance is approximately equal in magnitude to that
Optical parametric properties of ultraviolet-pumped cesium lithium borate crystals.
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We report the optical parametric properties of cesium lithium borate (CLBO) crystals pumped by UV radiation of the fourth-harmonic generation at 266 nm and the third-harmonic generation at 355 nm of a picosecond Nd:YAG laser. A special optical design was used to avoid damage to the optical elements
Effective removal of cesium from wastewater solutions using an innovative low-cost adsorbent developed from sewage sludge molten slag.
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This study investigates the effective removal of cesium (Cs) from aqueous solution using sewage sludge molten (SSM) slag that has undergone the surface modification with alkali (NaOH) hydrothermal treatment. The raw and modified slags were characterised systematically using the BET method, the
Optical correlator that uses cesium vapor.
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We obtain the correlation pattern between two amplitude-modulated input images of 36 and 280 random black and white pixels, using the standard degenerate four-wave-mixing geometry of 852-nm optical beams in a 1-mm-thick cesium-vapor cell. The total optical input power is 3.2 mW to obtain 0.4 nW of
Four-wave mixing of light beams with engineered orbital angular momentum in cold cesium atoms.
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We report an experimental demonstration that shows that the spatial structure carried by engineered coherent superpositions of light beams with orbital angular momentum can be mapped into the nonlinear polarization induced in a cloud of cold cesium atoms. The structure of such polarization was
Beyond optical molasses: 3D raman sideband cooling of atomic cesium to high phase-space density
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We demonstrate a simple, general purpose method to cool neutral atoms. A sample containing 3x10(8) cesium atoms prepared in a magneto-optical trap is cooled and simultaneously spin polarized in 10 ms at a density of 1.1x10(11) cm (-3) to a phase space density nlambda(3)(dB) = 1/500, which is almost
Memory-based optical polarization conversion in a double-[Formula: see text] atomic system with degenerate Zeeman states
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Optical memory based on the electromagnetically induced transparency (EIT) in a double-[Formula: see text] atomic system provides a convenient way to convert the frequency, bandwidth or polarization of an optical pulse by storing it in one [Formula: see text] channel and retrieving it from another.
Critical role of metal ions in surface engineering toward brightly luminescent and stable cesium lead bromide perovskite quantum dots.
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The highly dynamic binding ligands on the surface of all-inorganic cesium lead halide perovskite quantum dots (PQDs), which can be easily lost or detached leading to a deterioration in the optical properties and stability, are one of the greatest challenges for the practical storage and application
[Results of screening hematological and cytochemical blood studies of 906 children living in Bryansk Province at places with different intensities of soil contamination with cesium-137 and strontium-90].
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Populations of children living in the Bryansk territory (radionuclide contamination 0.2-63.9 Cu/km2) are characterized by heterogeneous blood counts, though relevant mean values are close to control. Mean cytochemical indices indicated a significant reduction in activity of point nonspecific
Superluminal reflection and transmission of light pulses via resonant four-wave mixing in cesium vapor.
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We report the experimental manipulation of the group velocities of reflected and transmitted light pulses in a degenerate two-level atomic system driven by a standing wave, which is created by two counter-propagating light beams of equal frequencies but variable amplitudes. It is shown that the
Periodic density functional theory study of spin crossover in the cesium iron hexacyanochromate prussian blue analog.
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This paper presents a detailed theoretical analysis of the electronic structure of the CsFe[Cr(CN)(6)] prussian blue analog with emphasis on the structural origin of the experimentally observed spin crossover transition in this material. Periodic density functional calculations using generalized
Sorption of cesium, cobalt and europium on low-rank coal and chitosan.
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Potential low-cost sorbents of metals based on combined action of coal and chitosan have been investigated. Sorption of Cs, Co and Eu on oxidized coals in mixture with chitosan was studied as function of pH ( approximately 3-6) in batch experiments using radiotracer method. An improved sorption
Living in Contaminated Radioactive Areas Is Not an Acute Risk Factor for Noncommunicable Disease Development: A Retrospective Observational Study.
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OBJECTIVE
Although much attention is now being paid to the health risks associated with nuclear disasters, reliable information is lacking. We retrospectively evaluated the health effects of living in highly contaminated radioactive areas in Japan.
METHODS
The health evaluation was conducted in
Investigations on biosatellites of the Cosmos series.
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Over the past decade, the USSR has launched six biosatellites of the Cosmos series. The first biosatellite flew 6 d; the remaining five flew 18-21 d. The principal purpose of this investigation was to continue studies on the adaptation of living systems to weightlessness; to investigate the
Η πληρέστερη βάση δεδομένων φαρμακευτικών βοτάνων που υποστηρίζεται από την επιστήμη
- Λειτουργεί σε 55 γλώσσες
- Βοτανικές θεραπείες που υποστηρίζονται από την επιστήμη
- Αναγνώριση βοτάνων με εικόνα
- Διαδραστικός χάρτης GPS - ετικέτα βότανα στην τοποθεσία (σύντομα)
- Διαβάστε επιστημονικές δημοσιεύσεις που σχετίζονται με την αναζήτησή σας
- Αναζήτηση φαρμακευτικών βοτάνων με τα αποτελέσματά τους
- Οργανώστε τα ενδιαφέροντά σας και μείνετε ενημερωμένοι με την έρευνα ειδήσεων, τις κλινικές δοκιμές και τα διπλώματα ευρεσιτεχνίας
Πληκτρολογήστε ένα σύμπτωμα ή μια ασθένεια και διαβάστε για βότανα που μπορεί να βοηθήσουν, πληκτρολογήστε ένα βότανο και δείτε ασθένειες και συμπτώματα κατά των οποίων χρησιμοποιείται.
* Όλες οι πληροφορίες βασίζονται σε δημοσιευμένη επιστημονική έρευνα
