277 research outputs found
Matter and physical anisotropy of ultramafites of the Barkhatny massif (Kuznetsk Alatau ridge, Western Siberia) as criteria of their mineral potential for geological prospecting works
A complex of petrographic, petrofabric, and paleomagnetic analyses that was carried out for rocks from an ultrabasic massif of the Barkhatnaya Mountain in the Northern part of the Kuznetsk Alatau allowed us to prove that internal anisotropy of mineral aggregates had deformation-type evolution, which indicates possible plastic exhumation of lithosphere mantle fragments into upper crust levels. Complete conformity of geophysical and petrofabric parameters points out high possibility of multistage model for obduction of ophiolite association segments proposed for this region. Taking into account specifics of minerageny for such complexes (chromite ores and noble metals, asbestos and nephrites), we offer a new technology for geological prospecting works at the stage of estimating mineral potential of such geological objects, which is based on the presence of differently oriented systems of mineral plane orientation.ΠΡΠΎΠ²Π΅Π΄Π΅Π½Π½ΡΠΉ Π½Π°ΠΌΠΈ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡ ΡΡΡΡΠΊΡΡΡΠ½ΠΎ-ΠΏΠ΅ΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΏΠ°Π»Π΅ΠΎΠΌΠ°Π³Π½ΠΈΡΠ½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ Π΄Π»Ρ ΡΠ»ΡΡΡΠ°Π±Π°Π·ΠΈΡΠΎΠ² ΠΠ°ΡΡ
Π°ΡΠ½ΠΎ- Π³ΠΎ ΠΌΠ°ΡΡΠΈΠ²Π° Π½Π° ΡΠ΅Π²Π΅ΡΠ½ΠΎΠΌ ΡΠΊΠ»ΠΎΠ½Π΅ ΠΡΠ·Π½Π΅ΡΠΊΠΎΠ³ΠΎ ΠΠ»Π°ΡΠ°Ρ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π°Π΅Ρ, ΡΡΠΎ Π²Π½ΡΡΡΠ΅Π½Π½ΡΡ Π°Π½ΠΈΠ·ΠΎΡΡΠΎΠΏΠΈΡ ΠΌΠΈΠ½Π΅ΡΠ°Π»ΡΠ½ΡΡ
Π°Π³ΡΠ΅Π³Π°ΡΠΎΠ² ΠΈΠΌΠ΅- Π»Π° Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΡΡ ΡΠ²ΠΎΠ»ΡΡΠΈΡ, ΠΊΠΎΡΠΎΡΠ°Ρ ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΡΡ ΠΏΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΡΡ ΡΠΊΡΠ³ΡΠΌΠ°ΡΠΈΡ ΡΡΠ°Π³ΠΌΠ΅Π½ΡΠΎΠ² ΠΌΠ°Π½ΡΠΈΠΈ Π»ΠΈΡΠΎΡΡΠ΅ΡΡ Π² Π²Π΅ΡΡ
Π½ΠΈΠ΅ Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΡ Π·Π΅ΠΌΠ½ΠΎΠΉ ΠΊΠΎΡΡ. ΠΠΎΠ»Π½ΠΎΠ΅ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΈΠ΅ Π³Π΅ΠΎΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΏΠ΅ΡΡΠΎΡΡΡΡΠΊΡΡΡΠ½ΡΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΎΡΠΌΠ΅ΡΠ°Π΅Ρ Π²ΡΡΠΎΠΊΡΡ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΡ ΠΌΠ½ΠΎΠ³ΠΎΡΡΠ°Π΄ΠΈΠΉΠ½ΠΎΠΉ ΠΎΠ±Π΄ΡΠΊΡΠΈΠΈ ΡΡΠ°Π³ΠΌΠ΅Π½ΡΠΎΠ² ΠΎΡΠΈΠΎΠ»ΠΈΡΠΎΠ²ΠΎΠΉ Π°ΡΡΠΎΡΠΈΠ°ΡΠΈΠΈ, ΠΏΡΠ΅Π΄Π»Π°Π³Π°Π΅ΠΌΠΎΠΉ Π΄Π»Ρ ΡΡΠΎΠ³ΠΎ ΡΠ΅Π³ΠΈΠΎΠ½Π°. ΠΡΠΈΠ½ΠΈΠΌΠ°Ρ Π²ΠΎ Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΠΌΠΈΠ½Π΅ΡΠ°Π³Π΅Π½ΠΈΠΈ (Ρ
ΡΠΎΠΌΠΈΡΠΎΠ²ΡΠ΅ ΡΡΠ΄Ρ ΠΈ Π±Π»Π°Π³ΠΎΡΠΎΠ΄Π½ΡΠ΅ ΠΌΠ΅ΡΠ°Π»Π»Ρ, Π°ΡΠ±Π΅ΡΡ ΠΈ Π½Π΅ΡΡΠΈΡ) Π΄Π»Ρ ΡΠ°ΠΊΠΈΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ² ΠΌΡ ΠΏΡΠ΅Π΄Π»Π°Π³Π°Π΅ΠΌ Π½ΠΎΠ²ΡΠ΅ ΠΌΠ΅ΡΠΎΠ΄Ρ Π³Π΅ΠΎΠ»ΠΎΠ³ΠΎΡΠ°Π·Π²Π΅Π΄ΠΎΡΠ½ΡΡ
ΡΠ°Π±ΠΎΡ Π½Π° ΡΡΠ°Π΄ΠΈΠΈ ΠΎΡΠ΅Π½ΠΊΠΈ ΡΡΠ΄ΠΎΠ½ΠΎΡΠ½ΠΎΡΡΠΈ Π³Π΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ², ΠΊΠΎΡΠΎΡΡΠ΅ Ρ
Π°ΡΠ°ΠΊ- ΡΠ΅ΡΠΈΠ·ΡΡΡΡΡ Π΄ΠΈΡΠΊΡΠ΅ΡΠ½ΡΠΌΠΈ Π²Π°ΡΠΈΠ°ΡΠΈΡΠΌΠΈ ΠΏΡΠΎΡΡΡΠ°Π½ΡΡΠ²Π΅Π½Π½ΠΎΠΉ ΠΎΡΠΈΠ΅Π½ΡΠΈΡΠΎΠ²ΠΊΠΈ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² ΡΠ΅ΠΊΡΡΡΡΠ½ΠΎΠΉ Π°Π½ΠΈΠ·ΠΎΡΡΠΎΠΏΠΈΠΈ ΠΏΠΎΡΠΎΠ΄
OUR EXPERIENCE OF TREATMENT OF PANCREATIC CYSTS
The aim. of the study was to determine the rational method, of surgical treatment of chronic pancreatic pseudocysts. The analysis of treatment of 82 patients with, chronic pancreatic pseudocysts cysts is presented, in the article. 68 patients had. punctures and drainage. On the basis of performed research, we found, out that chronic pancreatic pseudocysts of any size and. location developed, on the background, of pancreatitis in the absence of signs of sequestration, were an indication, for puncture and. drainage under ultrasound, guidance. The absence of recovery effect of mini-invasive treatment causes reasonable indications for open surgery
Far-red emitting fluorescent dyes for optical nanoscopy: Fluorinated siliconβrhodamines (SiRF dyes) and phosphorylated oxazines.
Far-red emitting fluorescent dyes for optical microscopy, stimulated emission depletion (STED), and ground-state depletion (GSDIM) super-resolution microscopy are presented. Fluorinated siliconβrhodamines (SiRF dyes) and phosphorylated oxazines have absorption and emission maxima at about Ξ»β660 and 680β
nm, respectively, possess high photostability, and large fluorescence quantum yields in water. A high-yielding synthetic path to introduce three aromatic fluorine atoms and unconventional conjugation/solubilization spacers into the scaffold of a siliconβrhodamine is described. The bathochromic shift in SiRF dyes is achieved without additional fused rings or double bonds. As a result, the molecular size and molecular mass stay quite small (<600β
Da). The use of the Ξ»=800β
nm STED beam instead of the commonly used one at Ξ»=750β775β
nm provides excellent imaging performance and suppresses re-excitation of SiRF and the oxazine dyes. The photophysical properties and immunofluorescence imaging performance of these new far-red emitting dyes (photobleaching, optical resolution, and switch-off behavior) are discussed in detail and compared with those of some well-established fluorophores with similar spectral properties
Parametric generation of second sound in superfluid helium: linear stability and nonlinear dynamics
We report the experimental studies of a parametric excitation of a second
sound (SS) by a first sound (FS) in a superfluid helium in a resonance cavity.
The results on several topics in this system are presented: (i) The linear
properties of the instability, namely, the threshold, its temperature and
geometrical dependencies, and the spectra of SS just above the onset were
measured. They were found to be in a good quantitative agreement with the
theory. (ii) It was shown that the mechanism of SS amplitude saturation is due
to the nonlinear attenuation of SS via three wave interactions between the SS
waves. Strong low frequency amplitude fluctuations of SS above the threshold
were observed. The spectra of these fluctuations had a universal shape with
exponentially decaying tails. Furthermore, the spectral width grew continuously
with the FS amplitude. The role of three and four wave interactions are
discussed with respect to the nonlinear SS behavior. The first evidence of
Gaussian statistics of the wave amplitudes for the parametrically generated
wave ensemble was obtained. (iii) The experiments on simultaneous pumping of
the FS and independent SS waves revealed new effects. Below the instability
threshold, the SS phase conjugation as a result of three-wave interactions
between the FS and SS waves was observed. Above the threshold two new effects
were found: a giant amplification of the SS wave intensity and strong resonance
oscillations of the SS wave amplitude as a function of the FS amplitude.
Qualitative explanations of these effects are suggested.Comment: 73 pages, 23 figures. to appear in Phys. Rev. B, July 1 st (2001
Hydroxylated fluorescent dyes for live-cell labeling: Synthesis, spectra and super-resolution STED.
Hydroxylated rhodamines, carbopyronines, silico- and germanorhodamines with absorption maxima in the range of 530-640 nm were prepared and applied in specific labeling of living cells. The direct and high-yielding entry to germa- and silaxanthones tolerates the presence of protected heteroatoms and may be considered for the syntheses of various sila- and germafluoresceins, as well as -rhodols. Application in stimulated emission depletion (STED) fluorescence microscopy revealed a resolution of 50-75 nm in one- and two-color imaging of vimentin-HaloTag fused protein and native tubulin. The established structure-property relationships allow prediction of the spectral properties and the positions of spirolactone/zwitterion equilibria for the new analogs of rhodamines, carbo-, silico- and germanorhodamines using simple additive schemes
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