354 research outputs found
Search for solar axions produced by Compton process and bremsstrahlung using the resonant absorption and axioelectric effect
The search for resonant absorption of Compton and bremsstrahlung solar axions
by Tm nuclei have been performed. Such an absorption should lead to the
excitation of low-lying nuclear energy level: Tm Tm Tm (8.41 keV). Additionally the
axio-electric effect in silicon atoms is sought. The axions are detected using
a Si(Li) detectors placed in a low-background setup. As a result, a new model
independent restrictions on the axion-electron and the axion-nucleon coupling:
and the axion-electron
coupling constant: has been obtained. The
limits leads to the bounds 7.9 eV and 1.3 keV for the
mass of the axion in the DFSZ and KSVZ models, respectively ( C.L.).Comment: 6 pages, 3 figures, contributed to the 9th Patras Workshop on Axions,
WIMPs and WISPs, Mainz, June 24-28, 201
Malignant hyperthermia: current approaches to prevention and treatment
One of the most serious complications of modern anesthesia is malignant hyperthermia, which is a pharmacogenetic disease phenotype manifested by skeletal muscle hypermetabolism and rhabdomyolysis during or after general anesthesia with the use of inhaled anesthetics and succinylcholine. In Russia, the problem of malignant hyperthermia remains unresolved. This is mainly due to the fact that the only specific drug dantrolene created for the effective treatment of malignant hyperthermia is still not legalized and thus formally prohibited to import, disseminate and apply on the domestic pharmaceutical market. This article deals with the regulatory framework of specific treatment of malignant hyperthermia in Russia, allowing the possibility to legally import to the territory of the Russian Federation dantrolene as an unregistered drug, if it is a question of rendering medical assistance on vital indications to a particular patient, or its unauthorized use for vital indications in a situation of extreme necessity. The article presents the recommendations of domestic experts on the treatment of malignant hyperthermia. In this case, as a possible alternative to dantrolene, magnesium preparations are considered, whose role in the treatment of the crisis of malignant hyperthermia continues to be specified. Thus, given the increasing use of inhalation anesthesia by Russian anesthetists, to ensure the safety of patients with regard to the development of malignant hyperthermia, it is possible only in the case of official registration in the domestic dantrolene market. Also, in the territory of Russia, a network of relevant consultative and diagnostic centers should be established. These measures will undoubtedly increase the effectiveness of treatment and prevention of severe consequences of this disease in our country
New limit on the mass of 9.4-keV solar axions emitted in an M1 transition in Kr nuclei
A search for resonant absorption of the solar axion by nuclei
was performed using the proportional counter installed inside the
low-background setup at the Baksan Neutrino Observatory. The obtained model
independent upper limit on the combination of isoscalar and isovector
axion-nucleon couplings allowed us to set
the new upper limit on the hadronic axion mass of eV (95\%
C.L.) with the generally accepted values =0.5 and =0.56.Comment: 5 pages, 2 figures, Proceedings of the 10th Patras Workshop on
Axions, WIMPs and WISP 29 June - 4 July 2014, CERN, Geneva, Switzerlan
Constraints on the axion-electron coupling for solar axions produced by Compton process and bremsstrahlung
The search for solar axions produced by Compton () and bremsstrahlung-like () processes has
been performed. The axion flux in the both cases depends on the axion-electron
coupling constant. The resonant excitation of low-lying nuclear level of
was looked for: Tm Tm
Tm (8.41 keV). The Si(Li) detector and
Tm target installed inside the low-background setup were used to detect
8.41 keV -rays. As a result, a new model independent restriction on the
axion-electron and the axion-nucleon couplings was obtained:
. In model of hadronic
axion this restriction corresponds to the upper limit on the axion-electron
coupling and on the axion mass eV (90%
c.l.). The limits on axion mass are 105 eV and 1.3 keV for
DFSZ- and KSVZ-axion models, correspondingly (90% c.l.).Comment: 7 pages, 4 figure
ΠΠ»ΠΈΡΠ½ΠΈΠ΅ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΡΠ΅Π΄Π°ΡΠΈΠΈ Ρ Π±ΠΎΠ»ΡΠ½ΡΡ Ρ ΠΎΡΡΡΠΎΠΉ ΡΡΠΆΠ΅Π»ΠΎΠΉ ΡΠ΅ΡΠ΅ΠΏΠ½ΠΎ-ΠΌΠΎΠ·Π³ΠΎΠ²ΠΎΠΉ ΡΡΠ°Π²ΠΌΠΎΠΉ Π½Π° ΠΏΠ΅ΡΠ΅ΠΊΠΈΡΠ½ΠΎΠ΅ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ Π»ΠΈΠΏΠΈΠ΄ΠΎΠ²
Objective: to study the impact of various sedation methods on lipid peroxidation in patients with acute severe brain injury. Subjects and methods. For this, 44 victims with this condition were examined. According the option of posttraumatic sedation therapy, the victims were divided into 3 groups: 1) 12 patients in whom sodium oxybutyrate was used for sedation; 2) 12 received thiopental sodium; 3) 20 patients were given propofol. The lipid peroxidation and antioxidant system were judged from the serum levels of fatty acid hydroperoxides and secondary lipid peroxidation products (malonic dialdehyde) and from the content of the endogenous antioxidant a-tocopherol. Results. The study performed indicated that the highest concentrations of fatty acid hydroperoxides were observed in Groups 1 and 2 within the first 24 posttraumatic hours. In Group 3 where propofol was used for sedation, the concentration of the hydroperoxides remained in the normal range although there was a tendency for their rise. Conclusion. Thus, propofol is the agent of choice for sedation that prevents the activation of lipid peroxidation and stabilizes some indices of the antioxidant system in patients with acute severe brain injury. Key words: brain injury, lipid peroxidation, sedation, sodium oxybutyrate, thiopental sodium, propofol.Π¦Π΅Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ β ΠΈΠ·ΡΡΠΈΡΡ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΡΠ΅Π΄Π°ΡΠΈΠΈ Ρ Π±ΠΎΠ»ΡΠ½ΡΡ
Ρ ΠΎΡΡΡΠΎΠΉ ΡΡΠΆΠ΅Π»ΠΎΠΉ ΡΠ΅ΡΠ΅ΠΏΠ½ΠΎ-ΠΌΠΎΠ·Π³ΠΎΠ²ΠΎΠΉ ΡΡΠ°Π²ΠΌΠΎΠΉ Π½Π° ΠΏΠ΅ΡΠ΅ΠΊΠΈΡΠ½ΠΎΠ΅ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ Π»ΠΈΠΏΠΈΠ΄ΠΎΠ². ΠΠ°ΡΠ΅ΡΠΈΠ°Π» ΠΈ ΠΌΠ΅ΡΠΎΠ΄Ρ. ΠΠ»Ρ Π΄ΠΎΡΡΠΈΠΆΠ΅Π½ΠΈΡ ΡΠΊΠ°Π·Π°Π½Π½ΠΎΠΉ ΡΠ΅Π»ΠΈ ΠΎΠ±ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ 44 ΠΏΠΎΡΡΡΠ°Π΄Π°Π²ΡΠΈΡ
Ρ ΠΎΡΡΡΠΎΠΉ ΡΡΠΆΠ΅Π»ΠΎΠΉ ΡΠ΅ΡΠ΅ΠΏΠ½ΠΎ-ΠΌΠΎΠ·Π³ΠΎΠ²ΠΎΠΉ ΡΡΠ°Π²ΠΌΠΎΠΉ. Π Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΎΡ Π²ΠΈΠ΄Π° ΡΠ΅Π΄Π°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠ΅ΡΠ°ΠΏΠΈΠΈ, ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ²ΡΠ΅ΠΉΡΡ Π² ΠΏΠΎΡΡΡΡΠ°Π²ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΠΏΠ΅ΡΠΈΠΎΠ΄Π΅, Π±ΠΎΠ»ΡΠ½ΡΠ΅ Π±ΡΠ»ΠΈ ΡΠ°Π·Π΄Π΅Π»Π΅Π½Ρ Π½Π° 3 Π³ΡΡΠΏΠΏΡ. Π I Π³ΡΡΠΏΠΏΡ (12 ΡΠ΅Π».) Π²ΠΎΡΠ»ΠΈ Π±ΠΎΠ»ΡΠ½ΡΠ΅, ΠΊΠΎΡΠΎΡΡΠΌ Ρ ΡΠ΅Π»ΡΡ ΡΠ΅Π΄Π°ΡΠΈΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΡΡ ΠΎΠΊΡΠΈΠ±ΡΡΠΈΡΠ°Ρ Π½Π°ΡΡΠΈΡ, Π²ΠΎ II Π³ΡΡΠΏΠΏΠ΅ (12 ΡΠ΅Π».) Π±ΠΎΠ»ΡΠ½ΡΡ
ΠΏΡΠΈΠΌΠ΅Π½ΡΠ»ΡΡ ΡΠΈΠΎΠΏΠ΅Π½ΡΠ°Π» Π½Π°ΡΡΠΈΡ, ΠΈ Π² III Π³ΡΡΠΏΠΏΠ΅ Π±ΠΎΠ»ΡΠ½ΡΡ
(20 ΡΠ΅Π».) Π²Π²ΠΎΠ΄ΠΈΠ»ΡΡ ΠΏΡΠΎΠΏΠΎΡΠΎΠ». Π ΡΠΎΡΡΠΎΡΠ½ΠΈΠΈ ΠΏΠ΅ΡΠ΅ΠΊΠΈΡΠ½ΠΎΠ³ΠΎ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΡ Π»ΠΈΠΏΠΈΠ΄ΠΎΠ² ΠΈ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ ΡΡΠ΄ΠΈΠ»ΠΈ ΠΏΠΎ ΡΡΠΎΠ²Π½Ρ Π² ΡΡΠ²ΠΎΡΠΎΡΠΊΠ΅ ΠΊΡΠΎΠ²ΠΈ Π³ΠΈΠ΄ΡΠΎΠΏΠ΅ΡΠ΅ΠΊΠΈΡΠ΅ΠΉ ΠΆΠΈΡΠ½ΡΡ
ΠΊΠΈΡΠ»ΠΎΡ ΠΈ Π²ΡΠΎΡΠΈΡΠ½ΡΡ
ΠΏΡΠΎΠ΄ΡΠΊΡΠΎΠ² ΠΏΠ΅ΡΠ΅ΠΊΠΈΡΠ½ΠΎΠ³ΠΎ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΡ Π»ΠΈΠΏΠΈΠ΄ΠΎΠ² β ΠΌΠ°Π»ΠΎΠ½ΠΎΠ²ΠΎΠ³ΠΎ Π΄ΠΈΠ°Π»ΡΠ΄Π΅Π³ΠΈΠ΄Π°, ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ ΡΠ½Π΄ΠΎΠ³Π΅Π½Π½ΠΎΠ³ΠΎ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ° Π°Π»ΡΡΠ°-ΡΠΎΠΊΠΎΡΠ΅ΡΠΎΠ»Π°. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Π½ΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΎ, ΡΡΠΎ Π² 1-Π΅ ΡΡΡΠΊΠΈ ΠΏΠΎΡΡΡΡΠ°Π²ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΠ΅ΡΠΈΠΎΠ΄Π° Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Π²ΡΡΠΎΠΊΠΈΠ΅ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Π³ΠΈΠ΄ΡΠΎΠΏΠ΅ΡΠ΅ΠΊΠΈΡΠ΅ΠΉ ΠΆΠΈΡΠ½ΡΡ
ΠΊΠΈΡΠ»ΠΎΡ ΠΎΡΠΌΠ΅ΡΠ°Π»ΠΈΡΡ Π² I ΠΈ II Π³ΡΡΠΏΠΏΠ°Ρ
Π±ΠΎΠ»ΡΠ½ΡΡ
. Π III ΠΆΠ΅ Π³ΡΡΠΏΠΏΠ΅ Π±ΠΎΠ»ΡΠ½ΡΡ
, Π³Π΄Π΅ Π΄Π»Ρ ΡΠ΅Π΄Π°ΡΠΈΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΡΡ ΠΏΡΠΎΠΏΠΎΡΠΎΠ», ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΡ Π³ΠΈΠ΄ΡΠΎΠΏΠ΅ΡΠ΅ΠΊΠΈΡΠ΅ΠΉ ΠΎΡΡΠ°Π²Π°Π»ΠΈΡΡ Π² ΠΏΡΠ΅Π΄Π΅Π»Π°Ρ
Π½ΠΎΡΠΌΠ°Π»ΡΠ½ΡΡ
Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ, Ρ
ΠΎΡΡ ΡΠ°ΠΊΠΆΠ΅ ΠΎΡΡΠ°Π²Π°Π»Π°ΡΡ ΡΠ΅Π½Π΄Π΅Π½ΡΠΈΡ ΠΊ ΠΈΡ
ΡΠΎΡΡΡ. ΠΠ°ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅. Π’Π°ΠΊΠΈΠΌ ΠΎΠ±ΡΠ°Π·ΠΎΠΌ, Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Π±Π»Π°Π³ΠΎΠΏΡΠΈΡΡΠ½ΡΠΌ Π²Π°ΡΠΈΠ°Π½ΡΠΎΠΌ ΡΠ΅Π΄Π°ΡΠΈΠΈ, ΠΏΡΠ΅Π΄ΡΠΏΡΠ΅ΠΆΠ΄Π°ΡΡΠ΅ΠΉ Π°ΠΊΡΠΈΠ²Π°ΡΠΈΡ ΠΏΠ΅ΡΠ΅ΠΊΠΈΡΠ½ΠΎΠ³ΠΎ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΡ Π»ΠΈΠΏΠΈΠ΄ΠΎΠ² ΠΈ ΡΡΠ°Π±ΠΈΠ»ΠΈΠ·ΠΈΡΡΡΡΠ΅ΠΉ Π½Π΅ΠΊΠΎΡΠΎΡΡΠ΅ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΠΈ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ Ρ Π±ΠΎΠ»ΡΠ½ΡΡ
Ρ ΠΎΡΡΡΠΎΠΉ ΡΡΠΆΠ΅Π»ΠΎΠΉ ΡΠ΅ΡΠ΅ΠΏΠ½ΠΎ-ΠΌΠΎΠ·Π³ΠΎΠ²ΠΎΠΉ ΡΡΠ°Π²ΠΌΠΎΠΉ ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΏΡΠΎΠΏΠΎΡΠΎΠ». ΠΠ»ΡΡΠ΅Π²ΡΠ΅ ΡΠ»ΠΎΠ²Π°: ΡΠ΅ΡΠ΅ΠΏΠ½ΠΎ-ΠΌΠΎΠ·Π³ΠΎΠ²Π°Ρ ΡΡΠ°Π²ΠΌΠ°, ΠΏΠ΅ΡΠ΅ΠΊΠΈΡΠ½ΠΎΠ΅ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ Π»ΠΈΠΏΠΈΠ΄ΠΎΠ², ΡΠ΅Π΄Π°ΡΠΈΡ, ΠΎΠΊΡΠΈΠ±ΡΡΠΈΡΠ°Ρ Π½Π°ΡΡΠΈΡ, ΡΠΈΠΎΠΏΠ΅Π½ΡΠ°Π» Π½Π°ΡΡΠΈΡ, ΠΏΡΠΎΠΏΠΎΡΠΎΠ»
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