241 research outputs found
The effect of short-term antiorthostatic hypokinesia on central and intracardiac hemodynamics and metabolism of a healthy person
The right parts of the heart and the radial artery were catheterized in healthy male volunteers before and 5 days after strict bedrest in antiorthostatic position of the body (-4.5 deg). After immobilization, most values of central circulation showed no essential changes; the only exceptions were indicates characterizing the inotropic myocardial condition. A shift in the direction of acidosis of a mixed character was noted in mixed venous blood, the beta lipoprotein content increased. A decrease in the arteriovenous difference in oxygen was encountered in blood draining from the heart (from the coronary sinus)
Photon assisted tunneling in pairs of silicon donors
Shallow donors in silicon are favorable candidates for the implementation of solid-state quantum computer architectures because of the promising combination of atomiclike coherence properties and scalability from the semiconductor manufacturing industry. Quantum processing schemes require (among other things) controlled information transfer for readout. Here we demonstrate controlled electron tunneling at 10 K from P to Sb impurities and vice versa with the assistance of resonant terahertz photons
Experimental study on grooved Si and Ge crystals for Laue lens application
An experimental study on the method of indentations for bent crystals to realize a hard X-ray Laue lens has been done. We tested the diffraction properties of indented Si and Ge crystalline plates at European Synchrotron Radiation
Facility (Grenoble, France). The samples were analyzed by diffraction of their (111) planes with hard X-rays from 150 to 600 keV. Crystals have shown significantly high diffraction efficiency, i.e. a Si crystal has exhibited up to 80% at 300 keV. A Ge crystal has confirmed the observation for a Si one, though the diffraction efficiency
was about 60%. In both cases rocking curves showed flat-toped rectangular shapes, which demonstrates that the method of indentations evenly bends the crystals. Moreover, measured angular spread was always very close to the morphological curvature of the sample under investigation, showing that this method offers high reproducibility and, thus, easy control of diffraction properties of the crystals
ΠΡΠΎΠ½Ρ ΠΈΠ°Π»ΡΠ½Π°Ρ Π°ΡΡΠΌΠ°, ΡΠ²ΠΈΡΡΡΡΠΈΠ΅ Ρ ΡΠΈΠΏΡ, ΡΠ»Π°ΡΡΠ΅Ρ. ΠΠΎΠ·ΠΌΠΎΠΆΠ½ΡΠ΅ Π²Π·Π°ΠΈΠΌΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ
Wheezing is the most common clinical sign and one of the key diagnostic criteria of asthma. Pathophysiology of wheezing is not fully recognized.Β A theory of hemodynamic flatter is widely adopted. Effects of vibration are actively investigated in patients with snore and obstructive sleep apnea.Β Vibration can contribute to the upper airway inflammation and endothelial dysfunction in snoring patients. Therefore, the flatter (vibration) effectΒ could be the key mechanism of wheezing in asthma patients and could promote similar changes in the lower airway microvasculature. Recently,Β CPAP therapy has been shown to reduce asthma symptoms and bronchial hyperresponsiveness and acts as a mechanical bronchodilator is patientsΒ with asthma without sleepassociated breathing disorders.Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ Π²Π·Π°ΠΈΠΌΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΡΠ²ΠΈΡΡΡΡΠΈΡ
Ρ
ΡΠΈΠΏΠΎΠ² (wheezing) ΠΈ Π²ΠΈΠ±ΡΠ°ΡΠΈΠΈ (ΡΠ»Π°ΡΡΠ΅ΡΠ°) Ρ Π±ΠΎΠ»ΡΠ½ΡΡ
Π±ΡΠΎΠ½Ρ
ΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π°ΡΡΠΌΠΎΠΉ (ΠΠ).Β ΠΡΠΈΠ²ΠΎΠ΄ΡΡΡΡ ΡΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠΈ Π²ΠΈΠ±ΡΠ°ΡΠΈΠΈ Π½Π° ΠΏΠ°ΡΠΎΡΠΈΠ·ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡΡ
Π²Π΅ΡΡ
Π½ΠΈΡ
Π΄ΡΡ
Π°ΡΠ΅Π»ΡΠ½ΡΡ
ΠΏΡΡΠ΅ΠΉ Π² ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ΅. ΠΡΡΠΊΠ°Π·Π°Π½ΠΎ ΠΏΡΠ΅Π΄ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΠ΅, ΡΡΠΎ Π²ΠΈΠ±ΡΠ°ΡΠΈΡ (ΡΠ»Π°ΡΡΠ΅Ρ) ΠΊΠ°ΠΊ ΠΎΠ΄ΠΈΠ½ ΠΈΠ· ΠΊΠ»ΡΡΠ΅Π²ΡΡ
ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠ² ΡΠ²ΠΈΡΡΡΡΠΈΡ
Ρ
ΡΠΈΠΏΠΎΠ² ΠΌΠΎΠΆΠ΅Ρ ΡΠΏΠΎΡΠΎΠ±ΡΡΠ²ΠΎΠ²Π°ΡΡ ΡΠ°Π·Π²ΠΈΡΠΈΡ Π²ΠΎΡΠΏΠ°Π»ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ, ΡΠ½Π΄ΠΎΡΠ΅Π»ΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π΄ΠΈΡΡΡΠ½ΠΊΡΠΈΠΈ ΠΌΠΈΠΊΡΠΎΡΠΈΡΠΊΡΠ»ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΡΡΠ»Π° Π² Π½ΠΈΠΆΠ½ΠΈΡ
ΠΎΡΠ΄Π΅Π»Π°Ρ
Π΄ΡΡ
Π°ΡΠ΅Π»ΡΠ½ΡΡ
ΠΏΡΡΠ΅ΠΉ Ρ Π±ΠΎΠ»ΡΠ½ΡΡ
ΠΠ
ΠΡΠΎΠ½Ρ ΠΈΠ°Π»ΡΠ½Π°Ρ Π°ΡΡΠΌΠ° ΠΈ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ Π΄ΡΡ Π°Π½ΠΈΡ: ΡΠΈΠ½Π΄ΡΠΎΠΌ Β«Π±ΡΠΎΠ½Ρ ΠΈΠ°Π»ΡΠ½Π°Ρ Π°ΡΡΠΌΠ°-ΠΏΠ»ΡΡΒ»
Comorbidity in asthma encompasses different respiratory system disorders including dysfunctional breathing and vocal cord dysfunction. Such comorbidity is referred to as "asthma-plus" syndrome. This condition is not fully investigated resulting in its late diagnosis and inadequate treatment. This article is a review of clinical signs, differential diagnosis, and key issues of management of "asthma-plus" syndrome.Π ΠΊΠΎΠΌΠΎΡΠ±ΠΈΠ΄Π½ΡΠΌ ΡΠΎΡΡΠΎΡΠ½ΠΈΡΠΌ Ρ Π±ΠΎΠ»ΡΠ½ΡΡ
Π±ΡΠΎΠ½Ρ
ΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π°ΡΡΠΌΠΎΠΉ (ΠΠ) ΠΎΡΠ½ΠΎΡΠΈΡΡΡ ΡΠ°Π·Π²ΠΈΡΠΈΠ΅ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
Π½Π°ΡΡΡΠ΅Π½ΠΈΠΉ Π΄ΡΡ
Π°Π½ΠΈΡ (Π€ΠΠ), Π²ΠΊΠ»ΡΡΠ°ΡΡΠΈΡ
Π΄ΠΈΡΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠ΅ Π΄ΡΡ
Π°Π½ΠΈΠ΅ ΠΈ Π΄ΠΈΡΡΡΠ½ΠΊΡΠΈΡ Π²ΠΎΠΊΠ°Π»ΡΠ½ΡΡ
Ρ
ΠΎΡΠ΄. Π‘ΠΎΡΠ΅ΡΠ°Π½ΠΈΠ΅ ΠΠ ΠΈ Π€ΠΠ Π² Π½Π°ΡΡΠΎΡΡΠ΅Π΅ Π²ΡΠ΅ΠΌΡ ΠΏΠΎΠ»ΡΡΠΈΠ»ΠΎ Π½Π°ΠΈΠΌΠ΅Π½ΠΎΠ²Π°Π½ΠΈΠ΅ Β«ΡΠΈΠ½Π΄ΡΠΎΠΌ Π±ΡΠΎΠ½Ρ
ΠΈΠ°Π»ΡΠ½Π°Ρ Π°ΡΡΠΌΠ°-ΠΏΠ»ΡΡΒ». ΠΠ΄Π½Π°ΠΊΠΎ ΠΏΡΠΎΠ±Π»Π΅ΠΌΡ Π€ΠΠ ΠΎΡΡΠ°ΡΡΡΡ Π½Π΅Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ ΠΈΠ·ΡΡΠ΅Π½Π½ΡΠΌΠΈ, ΡΡΠΎ ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»ΠΈΠ²Π°Π΅Ρ ΠΈΡ
ΠΏΠΎΠ·Π΄Π½ΡΡ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΡ ΠΈ Π½Π΅Π°Π΄Π΅ΠΊΠ²Π°ΡΠ½ΡΡ ΡΠ΅ΡΠ°ΠΏΠΈΡ. Π Π½Π°ΡΡΠΎΡΡΠ΅ΠΌ ΠΎΠ±Π·ΠΎΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ, Π°ΠΊΡΡΠ°Π»ΡΠ½ΡΠ΅ Π²ΠΎΠΏΡΠΎΡΡ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠΈ, ΡΠΊΠ°Π·Π°Π½Ρ ΡΡΡΠ΅ΡΡΠ²ΡΡΡΠΈΠ΅ ΠΏΡΠΈΠ½ΡΠΈΠΏΡ ΠΌΠ΅Π½Π΅Π΄ΠΆΠΌΠ΅Π½ΡΠ° Π€ΠΠ
ΠΠ°ΠΏΠ½ΠΎΠ³ΡΠ°ΡΠΈΡ Π² Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠ΅ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ Π½Π°ΡΡΡΠ΅Π½ΠΈΠΉ Π΄ΡΡ Π°Π½ΠΈΡ Ρ Π±ΠΎΠ»ΡΠ½ΡΡ Π½Π΅ΠΉΡΠΎΡΠΈΡΠΊΡΠ»ΡΡΠΎΡΠ½ΠΎΠΉ Π΄ΠΈΡΡΠΎΠ½ΠΈΠ΅ΠΉ
The study of functional respiratory disorders in patients with neurocirculatory dystonia has been conducted. Various respiratory disorders combined to hypocapnia, hypercapnia, normocapnia and changers of respiratory patterns are revealed. The features of acute hyperventilatory syndrome course are presented. It is signed that the capnographic investigation is important for clinical interpretation of functional respiratory disorders.ΠΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΠΎΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
Π½Π°ΡΡΡΠ΅Π½ΠΈΠΉ Π΄ΡΡ
Π°Π½ΠΈΡ Ρ Π±ΠΎΠ»ΡΠ½ΡΡ
Π½Π΅ΠΉΡΠΎΡΠΈΡΠΊΡΠ»ΡΡΠΎΡΠ½ΠΎΠΉ Π΄ΠΈΡΡΠΎΠ½ΠΈΠ΅ΠΉ. ΠΡΡΠ²Π»Π΅Π½Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠ΅ Π²Π°ΡΠΈΠ°Π½ΡΡ Π½Π°ΡΡΡΠ΅Π½ΠΈΠΉ Π΄ΡΡ
Π°Π½ΠΈΡ, ΠΊΠΎΡΠΎΡΡΠ΅ ΡΠΎΡΠ΅ΡΠ°Π»ΠΈΡΡ Ρ Π³ΠΈΠΏΠΎ-, Π³ΠΈΠΏΠ΅Ρ-, Π½ΠΎΡΠΌΠΎΠΊΠ°ΠΏΠ½ΠΈΠ΅ΠΉ, ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡΠΌΠΈ Π΄ΡΡ
Π°ΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠ°ΡΡΠ΅ΡΠ½Π°. ΠΠΎΠ΄ΡΠ΅ΡΠΊΠΈΠ²Π°Π΅ΡΡΡ Π²Π°ΠΆΠ½ΠΎΡΡΡ ΠΊΠ°ΠΏΠ½ΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π΄Π»Ρ ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈΠ½ΡΠ΅ΡΠΏΡΠ΅ΡΠ°ΡΠΈΠΈ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
Π½Π°ΡΡΡΠ΅Π½ΠΈΠΉ Π΄ΡΡ
Π°Π½ΠΈΡ
Velocity dependent interactions and a new sum rule in bcc He
Recent neutron scattering experiments [PRL,{\bf 88},p.195301 (2002)] on solid
He, discovered a new optic-like mode in the bcc phase. This excitation was
predicted by a recently proposed model that describes the correlated atomic
zero-point motion in bcc Helium in terms of dynamic electric dipole moments.
Modulations of the relative phase of these dipoles between different atoms
describes the anomalously soft T(110) phonon and two new optic-like modes,
one of which was recently found in the neutron scattering experiments. In this
work we show that the correlated dipolar interactions can be written as a
velocity dependent interaction. This then results in a modified f-sum rule for
the T(110) phonon, in good agreement with the recent experimental data.Comment: 5 pages, 3 figure
Simultaneous sub-second hyperpolarization of the nuclear and electron spins of phosphorus in silicon
We demonstrate a method which can hyperpolarize both the electron and nuclear
spins of 31P donors in Si at low field, where both would be essentially
unpolarized in equilibrium. It is based on the selective ionization of donors
in a specific hyperfine state by optically pumping donor bound exciton
hyperfine transitions, which can be spectrally resolved in 28Si. Electron and
nuclear polarizations of 90% and 76%, respectively, are obtained in less than a
second, providing an initialization mechanism for qubits based on these spins,
and enabling further ESR and NMR studies on dilute 31P in 28Si.Comment: 4 pages, 3 figure
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