129 research outputs found
Π‘ΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ ΡΠ»Π΅ΠΊΡΡΠΎΡ ΠΈΡΡΡΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈ ΡΠ°Π΄ΠΈΠΎΠ²ΠΎΠ»Π½ΠΎΠ²ΠΎΠ³ΠΎ ΡΠΏΠΎΡΠΎΠ±ΠΎΠ² ΡΠΊΡΡΠΈΠ·ΠΈΠΈ ΠΏΠΎΠ»ΠΈΠΏΠΎΠ² ΠΆΠ΅Π»ΡΠ΄ΠΊΠ°
The work is based on the analysis of treatment of 162 patients with gastric polyps. A comparative analysis of electrosurgical and radio-wave methods of polypectomy was performed. The both methods of excision of gastric polyps were equally effective, and radio-wave polypectomy was accompanied by less number of complications. The results of long-term follow up propose a lower rate of recurrent polyps after radio-wave polypectomy.Π‘ΡΠ°ΡΡΡ ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π° Π°ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΏΡΠΎΠ±Π»Π΅ΠΌΠ΅ ΡΠ½Π΄ΠΎΡΠΊΠΎΠΏΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π»Π΅ΡΠ΅Π½ΠΈΡ ΠΏΠΎΠ»ΠΈΠΏΠΎΠ² ΠΆΠ΅Π»ΡΠ΄ΠΊΠ°. Π ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π²ΠΊΠ»ΡΡΠ΅Π½ΠΎ 162 ΠΏΠ°ΡΠΈΠ΅Π½ΡΠ° Ρ ΠΏΠΎΠ»ΠΈΠΏΠ°ΠΌΠΈ ΠΆΠ΅Π»ΡΠ΄ΠΊΠ°. ΠΡΠΎΠ²Π΅Π΄Π΅Π½ ΡΡΠ°Π²Π½ΠΈΡΠ΅Π»ΡΠ½ΡΠΉ Π°Π½Π°Π»ΠΈΠ· ΡΠ»Π΅ΠΊΡΡΠΎΡ
ΠΈΡΡΡΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈ ΡΠ°Π΄ΠΈΠΎΠ²ΠΎΠ»Π½ΠΎΠ²ΠΎΠ³ΠΎ ΡΠΏΠΎΡΠΎΠ±ΠΎΠ² ΡΠ΄Π°Π»Π΅Π½ΠΈΡ ΠΏΠΎΠ»ΠΈΠΏΠΎΠ² ΠΆΠ΅Π»ΡΠ΄ΠΊΠ°. ΠΠ±Π° ΡΠΏΠΎΡΠΎΠ±Π° ΡΠΊΡΡΠΈΠ·ΠΈΠΈ ΠΏΠΎΠ»ΠΈΠΏΠΎΠ² ΠΆΠ΅Π»ΡΠ΄ΠΊΠ° ΠΏΡΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΠΎΠ²Π°Π»ΠΈ ΡΡ
ΠΎΠ΄Π½ΡΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΏΡΠΈ ΠΌΠ΅Π½ΡΡΠ΅ΠΌ ΡΡΠΎΠ²Π½Π΅ ΠΏΠΎΡΠ»Π΅ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΊΡΠΎΠ²ΠΎΡΠ΅ΡΠ΅Π½ΠΈΠΉ ΠΏΠΎΡΠ»Π΅ ΡΠ°Π΄ΠΈΠΎΠ²ΠΎΠ»Π½ΠΎΠ²ΠΎΠΉ ΠΏΠΎΠ»ΠΈΠΏΡΠΊΡΠΎΠΌΠΈΠΈ. ΠΡΠΎΠΌΠ΅ ΡΠΎΠ³ΠΎ, ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡΠ°Π΄ΠΈΠΎΠ²ΠΎΠ»Π½ΠΎΠ²ΠΎΠ³ΠΎ ΡΠΏΠΎΡΠΎΠ±Π° ΡΠΊΡΡΠΈΠ·ΠΈΠΈ ΠΏΠΎΠ»ΠΈΠΏΠΎΠ² ΠΆΠ΅Π»ΡΠ΄ΠΊΠ° ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ, ΠΏΠΎ Π΄Π°Π½Π½ΡΠΌ ΠΎΡΠ΄Π°Π»Π΅Π½Π½ΠΎΠ³ΠΎ ΠΎΠ±ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ², ΡΠΌΠ΅Π½ΡΡΠΈΡΡ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΡΠ΅ΡΠΈΠ΄ΠΈΠ²ΠΎΠ² ΠΏΠΎΠ»ΠΈΠΏΠΎΠ² ΠΆΠ΅Π»ΡΠ΄ΠΊΠ°
X-ray and neutron diffraction studies of coupled structural phase transitions in DyBaCoO
A structural transition at K from the to phase
is found to coincide with an anomaly of resistivity. Another structural phase
transition doubling the lattice parameter , which has been postulated
earlier to accompany a low-temperature magnetic transition in
TbBaCoO, is observed in a single crystal DbBaCoO by
means of the X-ray and neutron diffraction. The low temperature phase does not
belong to the space group that has been chosen earlier as the highest
subgroup of the . The transition is of the first order with the
temperature hysteresis, between and K, which
probably explains anomalous magnetic properties in this temperature range.Comment: 6 pages, 4 figure
ΠΡΠ±ΠΎΡ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΌΠ΅ΡΠΎΠ΄Π° Π»Π΅ΡΠ΅Π½ΠΈΡ Π±ΠΎΠ»ΡΠ½ΡΡ Ρ ΡΠΈΠ½Π΄ΡΠΎΠΌΠΎΠΌ ΠΠΈΡΠΈΠ·Π·ΠΈ
Retrospective analysis of treatment of 53 patients with Mirizzi syndrome was made. Diagnostic algorithm included transabdominal ultrasound - 53 (100%), ERCP - 39 (74%). Surgery was performed in 35 patients, in 21 (40%) cases - after endoscopic intervention. Post - ERCP complications were observed in 2 (5,1%) patients, complications after surgery - 2 (5,7%) patients. Lethality was 3 (6,7%).ΠΡΠΎΠ²Π΅Π΄Π΅Π½ ΡΠ΅ΡΡΠΎΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΠΉ Π°Π½Π°Π»ΠΈΠ· Π»Π΅ΡΠ΅Π½ΠΈΡ 53 ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ² Ρ ΡΠΈΠ½Π΄ΡΠΎΠΌΠΎΠΌ ΠΠΈΡΠΈΠ·Π·ΠΈ. ΠΠΈΠ°Π³Π½ΠΎΡΡΠΈΡΠ΅ΡΠΊΠΈΠΉ Π°Π»Π³ΠΎΡΠΈΡΠΌ Ρ 53 Π±ΠΎΠ»ΡΠ½ΡΡ
Π²ΠΊΠ»ΡΡΠ°Π»: Π£ΠΠ - 53 (100%) ΠΏΠ°ΡΠΈΠ΅Π½ΡΠ°ΠΌ, ΠΠ Π₯ΠΠ - Π² 39 (74,0%) ΡΠ»ΡΡΠ°ΡΡ
. ΠΠΏΠ΅ΡΠΈΡΠΎΠ²Π°Π½Ρ 35 Π±ΠΎΠ»ΡΠ½ΡΡ
, ΠΈΠ· Π½ΠΈΡ
21 (40%) ΠΏΠ°ΡΠΈΠ΅Π½Ρ ΠΏΠΎΡΠ»Π΅ ΡΠ½Π΄ΠΎΡΠΊΠΎΠΏΠΈΡΠ΅ΡΠΊΠΈΡ
Π²ΠΌΠ΅ΡΠ°ΡΠ΅Π»ΡΡΡΠ². ΠΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΡ ΠΏΠΎΡΠ»Π΅ ΠΠ Π₯ΠΠ ΠΎΡΠΌΠ΅ΡΠ΅Π½Ρ Ρ 2 (5,1%) ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ², ΠΏΠΎΡΠ»Π΅ Ρ
ΠΈΡΡΡΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
Π²ΠΌΠ΅ΡΠ°ΡΠ΅Π»ΡΡΡΠ² ΠΎΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΡ Π²ΡΡΠ²Π»Π΅Π½Ρ Π² 2 (5,7%) ΡΠ»ΡΡΠ°ΡΡ
. ΠΠ΅ΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΡΠΎΡΡΠ°Π²ΠΈΠ»Π° 3 (6,7%)
Bound Chains of Tilted Dipoles in Layered Systems
Ultracold polar molecules in multilayered systems have been experimentally
realized very recently. While experiments study these systems almost
exclusively through their chemical reactivity, the outlook for creating and
manipulating exotic few- and many-body physics in dipolar systems is
fascinating. Here we concentrate on few-body states in a multilayered setup. We
exploit the geometry of the interlayer potential to calculate the two- and
three-body chains with one molecule in each layer. The focus is on dipoles that
are aligned at some angle with respect to the layer planes by means of an
external eletric field. The binding energy and the spatial structure of the
bound states are studied in several different ways using analytical approaches.
The results are compared to stochastic variational calculations and very good
agreement is found. We conclude that approximations based on harmonic
oscillator potentials are accurate even for tilted dipoles when the geometry of
the potential landscape is taken into account.Comment: 10 pages, 6 figures. Submitted to Few-body Systems special issue on
Critical Stability, revised versio
Preparation of facilities for fundamental research with ultracold neutrons at PNPI
The WWR-M reactor of PNPI offers a unique opportunity to prepare a source for
ultracold neutrons (UCN) in an environment of high neutron flux (about 3*10^12
n/cm^2/s) at still acceptable radiation heat release (about 4*10^-3 W/g). It
can be realized within the reactor thermal column situated close to the reactor
core. With its large diameter of 1 m, this channel allows to install a 15 cm
thick bismuth shielding, a graphite premoderator (300 dm^3 at 20 K), and a
superfluid helium converter (35 dm^3). At a temperature of 1.2 K it is possible
to remove the heat release power of about 20 W. Using the 4pi flux of cold
neutrons within the reactor column can bring more than a factor 100 of cold
neutron flux incident on the superfluid helium with respect to the present cold
neutron beam conditions at the ILL reactor. The storage lifetime for UCN in
superfluid He at 1.2 K is about 30 s, which is sufficient when feeding
experiments requiring a similar filling time. The calculated density of UCN
with energy between 50 neV and 250 neV in an experimental volume of 40 liters
is about 10^4 n/cm^3. Technical solutions for realization of the project are
discussed.Comment: 10 pages, more detail
Thermodynamics of Dipolar Chain Systems
The thermodynamics of a quantum system of layers containing perpendicularly
oriented dipolar molecules is studied within an oscillator approximation for
both bosonic and fermionic species. The system is assumed to be built from
chains with one molecule in each layer. We consider the effects of the
intralayer repulsion and quantum statistical requirements in systems with more
than one chain. Specifically, we consider the case of two chains and solve the
problem analytically within the harmonic Hamiltonian approach which is accurate
for large dipole moments. The case of three chains is calculated numerically.
Our findings indicate that thermodynamic observables, such as the heat
capacity, can be used to probe the signatures of the intralayer interaction
between chains. This should be relevant for near future experiments on polar
molecules with strong dipole moments.Comment: 15 pages, 5 figures, final versio
Sub-collision hyperfine structure of nonlinear-optical resonance with field scanning
Some experimental evidences for methane are produced that the simple
transition from frequency scanning of nonlinear-optical resonances to magnetic
one may be accompanied with transition from sub-Doppler collisionally broadened
structure to sub-collision hyperfine one. It is conditioned by nonlinearity of
splitting of hyperfine sublevel for molecules in the adiabatically varied
magnetic field and respectively breaking the analogy of magnetic and frequency
scannings. The exact calculation of the resonance structure is considered for
molecules with only one spin subsystem. The approximately spin-additive
calculation of the structure is given for sufficiently fast rotating molecules
with greater number of spin subsystems. Within the same approximation an
example of hyperfine doubling in the magnetic and electric spectra of
nonlinear-optical resonance is considered for fluoromethane.Comment: 56 pages, 10 figures, accepted for publication in J. Mol. Spectrosc
ΠΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π°Π½ΡΠΈΠ±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΡΠ°ΡΠΈΠ»ΠΎΠΊΠΎΠΊΠΊΠΎΠ²ΠΎΠ³ΠΎ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³Π° ph20 ΠΈ Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³Π° ΡΠΈΠ½Π΅Π³Π½ΠΎΠΉΠ½ΠΎΠΉ ΠΏΠ°Π»ΠΎΡΠΊΠΈ ph57 ΠΏΡΠΈ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ ΠΈΡ ΠΈΠΌΠΏΡΠ΅Π³Π½Π°ΡΠΈΠΈ Π² ΠΎΡΡΠΎΠΏΠ΅Π΄ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠ½ΡΠ΅ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ ΠΈΠ· ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°ΡΠ° (ΠΊΠΎΡΡΠ½ΠΎΠ³ΠΎ ΡΠ΅ΠΌΠ΅Π½ΡΠ°)
Background: The problem of bacterial colonization of implants used in medical practice continues to be relevant regardless of the material of the implant. Particular attention deserves polymeric implants, which are prepared ex tempore from polymethyl methacrylate, for example - duting orthopedic surgical interventions (so-called "bone cement"). The protection of such implants by antibiotic impregnation is subjected to multiple criticisms, therefore, as an alternative to antibiotics, lytic bacteriophages with a number of unique advantages can be used - however, no experimental studies have been published on the possibility of impregnating bacteriophages into polymethyl methacrylate and their antibacterial activity assessment under such conditions.Aims: to evaluate the possibility of physical placement of bacteriophages in polymethylmethacrylate and to characterize the lytic antibacterial effect of two different strains of bacteriophages when impregnated into polymer carrier ex tempore during the polymerization process in in vitro model.Materials and methods: Β First stage - Atomic force microscopy (AFM) of polymethyl methacrylate samples for medical purposes was used to determine the presence and size of caverns in polymethyl methacrylate after completion of its polymerization at various reaction Β temperatures (+6β¦+25Β°C and +18β¦+50Β°C).The second stage was performed in vitro and included an impregnation of two different bacteriophage strains (phage ph20 active against S. aureus and ph57 active against Ps. aeruginosa) into polymethyl methacrylate during the polymerization process, followed by determination of their antibacterial activity.Results: ACM showed the possibility of bacteriophages placement in the cavities of polymethyl methacrylate - the median of the section and the depth of cavities on the outer surface of the polymer sample polymerized at +18β¦+50Β°C were 100.0 and 40.0 nm, respectively, and on the surface of the transverse cleavage of the sample - 120.0 and 100.0 nm, respectively, which statistically did not differ from the geometric dimensions of the caverns of the sample polymerized at a temperature of +6β¦+25Β°C.The study of antibacterial activity showed that the ph20 bacteriophage impregnated in polymethyl methacrylate at +6β¦+25Β°C lost its effective titer within the first six days after the start of the experiment, while the phage ph57 retained an effective titer for at least 13 days.Conclusion: the study confirmed the possibility of bacteriophages impregnation into medical grade polymethyl methacrylate, maintaining the effective titer of the bacteriophage during phage emission into the external environment, which opens the way for the possible application of this method of bacteriophage delivery in clinical practice. It is also assumed that certain bacteriophages are susceptible to aggressive influences from the chemical components of "bone cement" and / or polymerization reaction products, which requires strict selection of bacteriophage strains that could be suitable for this method of delivery.ΠΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠ΅. ΠΡΠΎΠ±Π»Π΅ΠΌΠ° Π±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΠΊΠΎΠ»ΠΎΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΠΌΡΡ
Β Π²Β ΠΌΠ΅Π΄ΠΈΡΠΈΠ½ΡΠΊΠΎΠΉ ΠΏΡΠ°ΠΊΡΠΈΠΊΠ΅ ΠΈΠΌΠΏΠ»Π°Π½ΡΠ°ΡΠΎΠ² ΠΈΠ· ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΠΏΡΠΎΠ΄ΠΎΠ»ΠΆΠ°Π΅Ρ ΠΎΡΡΠ°Π²Π°ΡΡΡΡ Π°ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠΉ, Π½Π΅Π·Π°Π²ΠΈΡΠΈΠΌΠΎ ΠΎΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ Π΄Π»Ρ ΠΈΡ
ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»Π΅Π½ΠΈΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°. ΠΡΠ΄Π΅Π»ΡΠ½ΠΎΠ³ΠΎ Π²Π½ΠΈΠΌΠ°Π½ΠΈΡ Π·Π°ΡΠ»ΡΠΆΠΈΠ²Π°ΡΡ ΠΈΠΌΠΏΠ»Π°Π½ΡΠΈΡΡΠ΅ΠΌΡΠ΅Β Π²Β ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠ½ΡΠ΅ ΠΈΠΌΠΏΠ»Π°Π½ΡΠ°ΡΡ, ΠΊΠΎΡΠΎΡΡΠ΅ ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»ΡΡΡ exΒ tempore (ΠΏΠΎ ΠΌΠ΅ΡΠ΅ Π½Π°Π΄ΠΎΠ±Π½ΠΎΡΡΠΈ) ΠΈΠ· ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°ΡΠ°, Π½Π°ΠΏΡΠΈΠΌΠ΅Ρ ΠΏΡΠΈ ΠΎΡΡΠΎΠΏΠ΅Π΄ΠΈΡΠ΅ΡΠΊΠΈΡ
Ρ
ΠΈΡΡΡΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
Π²ΠΌΠ΅ΡΠ°ΡΠ΅Π»ΡΡΡΠ²Π°Ρ
(ΡΠ°ΠΊ Π½Π°Π·ΡΠ²Π°Π΅ΠΌΡΠΉ ΠΊΠΎΡΡΠ½ΡΠΉ ΡΠ΅ΠΌΠ΅Π½Ρ). ΠΠ°ΡΠΈΡΠ° ΡΠ°ΠΊΠΈΡ
ΠΈΠΌΠΏΠ»Π°Π½ΡΠ°ΡΠΎΠ² ΠΏΡΡΠ΅ΠΌ ΠΈΠΌΠΏΡΠ΅Π³Π½Π°ΡΠΈΠΈΒ Π²Β Π½ΠΈΡ
Π°Π½ΡΠΈΠ±ΠΈΠΎΡΠΈΠΊΠΎΠ² ΠΏΠΎΠ΄Π²Π΅ΡΠ³Π°Π΅ΡΡΡ ΠΌΠ½ΠΎΠΆΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠΉ ΠΊΡΠΈΡΠΈΠΊΠ΅, ΠΏΠΎΡΡΠΎΠΌΡΒ Π²Β ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π°Π»ΡΡΠ΅ΡΠ½Π°ΡΠΈΠ²Ρ Π°Π½ΡΠΈΠ±ΠΈΠΎΡΠΈΠΊΠ°ΠΌ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΈ, ΠΎΠ±Π»Π°Π΄Π°ΡΡΠΈΠ΅ ΡΡΠ΄ΠΎΠΌ ΡΠ½ΠΈΠΊΠ°Π»ΡΠ½ΡΡ
ΠΏΡΠ΅ΠΈΠΌΡΡΠ΅ΡΡΠ², ΠΎΠ΄Π½Π°ΠΊΠΎ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΡΠ°Π±ΠΎΡ ΠΏΠΎ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ ΠΈΠΌΠΏΡΠ΅Π³Π½Π°ΡΠΈΠΈ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΎΠ²Β Π²Β ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°ΡΒ ΠΈΒ Π°Π½ΡΠΈΠ±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈΒ Π²Β ΡΠ°ΠΊΠΈΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Β Π²Β Π»ΠΈΡΠ΅ΡΠ°ΡΡΡΠ΅ Π½Π΅ ΠΎΠΏΡΠ±Π»ΠΈΠΊΠΎΠ²Π°Π½ΠΎ.Β Π¦Π΅Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡΒ β ΠΈΠ·ΡΡΠΈΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ°Π·ΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΎΠ²Β Π²Β ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°ΡΠ΅Β ΠΈ Π²Β ΠΌΠΎΠ΄Π΅Π»ΠΈΒ inΒ vitroΒ ΠΎΡ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΠΎΠ²Π°ΡΡ Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠΉ Π°Π½ΡΠΈΠ±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΡΠΉ ΡΡΡΠ΅ΠΊΡ Π΄Π²ΡΡ
ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΡΡΠ°ΠΌΠΌΠΎΠ² Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΎΠ² ΠΏΡΠΈ ΠΈΡ
ΠΈΠΌΠΏΡΠ΅Π³Π½Π°ΡΠΈΠΈΒ Π²Β ΠΈΠ·Π³ΠΎΡΠ°Π²Π»ΠΈΠ²Π°Π΅ΠΌΡΠΉ exΒ tempore ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠ½ΡΠΉ Π½ΠΎΡΠΈΡΠ΅Π»Ρ Π½Π° ΡΡΠ°ΠΏΠ΅ ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ·Π°ΡΠΈΠΈ.Β ΠΠ΅ΡΠΎΠ΄Ρ. ΠΠ΅ΡΠ²ΡΠΌ ΡΡΠ°ΠΏΠΎΠΌ Π±ΡΠ»Π° ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π°Β Π°ΡΠΎΠΌΠ½ΠΎ-ΡΠΈΠ»ΠΎΠ²Π°Ρ ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠΈΡ (ΠΠ‘Π) ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°ΡΠ° ΠΌΠ΅Π΄ΠΈΡΠΈΠ½ΡΠΊΠΎΠ³ΠΎ Π½Π°Π·Π½Π°ΡΠ΅Π½ΠΈΡ Π΄Π»Ρ Π²ΡΡΡΠ½Π΅Π½ΠΈΡ Π½Π°Π»ΠΈΡΠΈΡΒ ΠΈΒ ΡΠ°Π·ΠΌΠ΅ΡΠΎΠ² ΠΊΠ°Π²Π΅ΡΠ½, ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π²ΡΠΈΡ
ΡΡ ΠΏΠΎΡΠ»Π΅ Π·Π°Π²Π΅ΡΡΠ΅Π½ΠΈΡ ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ·Π°ΡΠΈΠΈ ΠΏΡΠΈ ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠΌ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡ ΡΠ΅Π°ΠΊΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠΌΠ΅ΡΠΈ (+6β¦+25 Β°CΒ ΠΈΒ +18β¦+50 Β°C). ΠΡΠΎΡΡΠΌ ΡΡΠ°ΠΏΠΎΠΌ inΒ vitro Π±ΡΠ»ΠΎ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π° ΠΈΠΌΠΏΡΠ΅Π³Π½Π°ΡΠΈΡ Π΄Π²ΡΡ
ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΡΡΠ°ΠΌΠΌΠΎΠ² Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΎΠ² (ph20, Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎΒ Π²Β ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΈ StaphylococcusΒ aureus,Β ΠΈΒ ph57, Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎΒ Π²Β ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΈ PseudomonasΒ aeruginosa)Β Π²Β ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°Ρ Π½Π° ΡΡΠ°ΠΏΠ΅ ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ·Π°ΡΠΈΠΈΒ ΡΒ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΡΠΈΠΌ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ΠΌ ΠΈΡ
Π°Π½ΡΠΈΠ±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ.Β Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ.Β ΠΒ Ρ
ΠΎΠ΄Π΅ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ΠΈΡ ΠΠ‘Π ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΡΠ°Π·ΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΎΠ²Β Π²Β ΠΊΠ°Π²Π΅ΡΠ½Π°Ρ
ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°ΡΠ°: ΠΌΠ΅Π΄ΠΈΠ°Π½Π° ΡΠ΅ΡΠ΅Π½ΠΈΡΒ ΠΈΒ Π³Π»ΡΠ±ΠΈΠ½Ρ ΠΊΠ°Π²Π΅ΡΠ½ Π½Π° Π²Π½Π΅ΡΠ½Π΅ΠΉ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΎΠ±ΡΠ°Π·ΡΠ°, ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ·ΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΏΡΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ΅ +18β¦+50 Β°C, ΡΠΎΡΡΠ°Π²ΠΈΠ»Π° 100,0Β ΠΈΒ 40,0Β Π½ΠΌ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ,Β Π°Β Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΏΠΎΠΏΠ΅ΡΠ΅ΡΠ½ΠΎΠ³ΠΎ ΡΠΊΠΎΠ»Π° ΠΎΠ±ΡΠ°Π·ΡΠ°Β β 120,0Β ΠΈΒ 100,0Β Π½ΠΌ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ, ΡΡΠΎ ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈ Π½Π΅ ΠΎΡΠ»ΠΈΡΠ°Π»ΠΎΡΡ ΠΎΡ Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ°Π·ΠΌΠ΅ΡΠΎΠ² ΠΊΠ°Π²Π΅ΡΠ½ ΠΎΠ±ΡΠ°Π·ΡΠ°, ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ·ΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΏΡΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ΅ +6β¦+25 Β°C. ΠΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π°Π½ΡΠΈΠ±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΎ, ΡΡΠΎ ΠΈΠΌΠΏΡΠ΅Π³Π½ΠΈΡΠΎΠ²Π°Π½Π½ΡΠΉ ΠΏΡΠΈ +6β¦+25 Β°CΒ Π²Β ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°Ρ ΡΡΠ°ΡΠΈΠ»ΠΎΠΊΠΎΠΊΠΊΠΎΠ²ΡΠΉ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³Β ph20 ΡΡΡΠ°ΡΠΈΠ» ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΠΉ ΡΠΈΡΡ ΡΠΆΠ΅Β Π²Β ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ ΠΏΠ΅ΡΠ²ΡΡ
ΡΠ΅ΡΡΠΈ ΡΡΡΠΎΠΊΒ ΡΒ ΠΌΠΎΠΌΠ΅Π½ΡΠ° Π½Π°ΡΠ°Π»Π° ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°, ΡΠΎΠ³Π΄Π° ΠΊΠ°ΠΊ ΡΠΈΠ½Π΅Π³Π½ΠΎΠΉΠ½ΡΠΉ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³Β ph57 ΡΠΎΡ
ΡΠ°Π½ΡΠ» ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΠΉ ΡΠΈΡΡ ΠΊΠ°ΠΊ ΠΌΠΈΠ½ΠΈΠΌΡΠΌΒ Π²Β ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ 13Β ΡΡΡ.Β ΠΠ°ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅.Β ΠΒ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΈ Π±ΡΠ»Π° ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π΅Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΠΈΠΌΠΏΡΠ΅Π³Π½Π°ΡΠΈΠΈ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΎΠ²Β Π²Β ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°Ρ ΠΌΠ΅Π΄ΠΈΡΠΈΠ½ΡΠΊΠΎΠ³ΠΎ Π½Π°Π·Π½Π°ΡΠ΅Π½ΠΈΡΒ ΡΒ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ΠΌ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠΈΡΡΠ° Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³Π° ΠΏΡΠΈ Π΅Π³ΠΎ ΡΠΌΠΈΡΡΠΈΠΈ Π²ΠΎ Π²Π½Π΅ΡΠ½ΡΡ ΡΡΠ΅Π΄Ρ, ΡΡΠΎ ΠΎΡΠΊΡΡΠ²Π°Π΅Ρ ΠΏΡΡΠΈ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΠ³ΠΎ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠ°ΠΊΠΎΠ³ΠΎ ΡΠΏΠΎΡΠΎΠ±Π° Π΄ΠΎΡΡΠ°Π²ΠΊΠΈ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΎΠ²Β Π²Β ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠ°ΠΊΡΠΈΠΊΠ΅. Π’Π°ΠΊΠΆΠ΅ ΡΠ΄Π΅Π»Π°Π½Ρ ΠΏΡΠ΅Π΄ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡΒ ΠΎΒ Π²Π΅ΡΠΎΡΡΠ½ΠΎΠΉ ΠΏΠΎΠ΄Π²Π΅ΡΠΆΠ΅Π½Π½ΠΎΡΡΠΈ Π½Π΅ΠΊΠΎΡΠΎΡΡΡ
Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΎΠ² Π°Π³ΡΠ΅ΡΡΠΈΠ²Π½ΡΠΌ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡΠΌ ΡΠΎ ΡΡΠΎΡΠΎΠ½Ρ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠΎΠ² Β«ΠΊΠΎΡΡΠ½ΠΎΠ³ΠΎ ΡΠ΅ΠΌΠ΅Π½ΡΠ°Β» ΠΈ/ΠΈΠ»ΠΈ ΠΏΡΠΎΠ΄ΡΠΊΡΠΎΠ² ΡΠ΅Π°ΠΊΡΠΈΠΈ ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ·Π°ΡΠΈΠΈ, ΡΡΠΎ ΡΡΠ΅Π±ΡΠ΅Ρ ΡΡΡΠΎΠ³ΠΎΠ³ΠΎ ΠΎΡΠ±ΠΎΡΠ° ΠΏΡΠΈΠ³ΠΎΠ΄Π½ΡΡ
Π΄Π»Ρ ΠΏΠΎΠ΄ΠΎΠ±Π½ΠΎΠ³ΠΎ ΡΠΏΠΎΡΠΎΠ±Π° Π΄ΠΎΡΡΠ°Π²ΠΊΠΈ ΡΡΠ°ΠΌΠΌΠΎΠ² Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³ΠΎΠ²
Density Waves in Layered Systems with Fermionic Polar Molecules
A layered system of two-dimensional planes containing fermionic polar
molecules can potentially realize a number of exotic quantum many-body states.
Among the predictions, are density-wave instabilities driven by the anisotropic
part of the dipole-dipole interaction in a single layer. However, in typical
multilayer setups it is reasonable to expect that the onset and properties of a
density-wave are modified by adjacent layers. Here we show that this is indeed
the case. For multiple layers the critical strength for the density-wave
instability decreases with the number of layers. The effect depends on density
and is more pronounced in the low density regime. The lowest solution of the
instability corresponds to the density waves in the different layers being
in-phase, whereas higher solutions have one or several adjancet layers that are
out of phase. The parameter regime needed to explore this instability is within
reach of current experiments.Comment: 7 pages, 4 figures. Final version in EPJD, EuroQUAM special issue
"Cold Quantum Matter - Achievements and Prospects
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