Диагностика и лечение черепно-мозговой травмы у детей

In this work, we have analyzed 2 774 case records of children after traumatic brain injury for the period of 2003 to 2007 (based on materials of the Tomsk Municipal Children’s Hospital No. 4). The age structure and causes of a traumatic brain injury have been analyzed. Most often complaints of children coming to the hospital are revealed, as well as typical changes in the cerebral hemodynamics (from the data of по данным rheoencephalography) and some parameters characterizing the neurological status of patients immediately after the injury and six months later. Based on the analysis of case records and health status questionnaires of children having traumatic brain injury up to six months later, it is shown that parents of patients in some cases do not adhere doctor’s recommendations after leaving the hospital. The therapy of traumatic brain injury in children requires successive treatment in hospital and at home and development of simple and acceptable rehabilitation schemes for children.Проанализированы 2 774 истории болезни детей, перенесших черепно-мозговую травму (ЧМТ) в период с 2003 по 2007 г. (по материалам детской городской больницы № 4 г. Томска). Изучена возрастная структура и причины ЧМТ. Выявлены наиболее распространенные жалобы детей при поступлении в стационар, типичные изменения церебральной гемодинамики (по данным реоэнцефалографии) и некоторые параметры, характеризующие неврологический статус пострадавших непосредственно при поступлении в стационар и спустя 6 мес после перенесенной ЧМТ. На основе анализа историй болезни и проведенного анкетирования детей, перенесших ЧМТ до 6 мес назад, показано, что родители пострадавших детей в ряде случаев не соблюдают рекомендации, данные при выписке из стационара. Терапия ЧМТ у детей требует обеспечения преемственности лечения между стационарными и поликлиническими звеньями, а также разработки простых и приемлемых схем реабилитации детей

Experiments on wave turbulence : the evolution and growth of second sound acoustic turbulence in superfluid 4He confirm self-similarity.

We report our experiments on the formation of second sound acoustic turbulence in superfluid 4He. The initial growth in spectral amplitude follows power laws that steepen rapidly with increasing harmonic number n, corresponding to a propagating front in frequency space. The lower growth exponents agree well with analytic predictions and numerical modeling. The observed increase in the formation delay with n validates the concept of selfsimilarity in the growth of wave turbulence

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

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

Electronic Transport Imaging in a Multiwire SnO2 ChemFET Device

The electronic transport and the sensing performance of an individual SnO2 crossed nanowires device in a three-terminal field effect configuration were investigated using a combination of macroscopic transport measurements and Scanning Surface Potential Microscopy (SSPM). The structure of the device was determined using both Scanning Electron- and Atomic Force Microscopy data. The SSPM images of two crossed 1D nanostructures, simulating a prototypical nanowire network sensors, exhibit large dc potential drops at the crossed-wire junction and at the contacts, identifying them as the primary electroactive elements in the circuit. The gas sensitivity of this device was comparable to those of sensors formed by individual homogeneous nanostructures of similar dimensions. Under ambient conditions, the DC transport measurements were found to be strongly affected by field-induced surface charges on the nanostructure and the gate oxide. These charges result in a memory effect in transport measurements and charge dynamics which are visualized by SSPM. Finally, scanning probe microscopy is used to measure the current-voltage characteristics of individual active circuit elements, paving the way to a detailed understanding of chemical functionality at the level of an individual electroactive element in an individual nanowire.Comment: 30 pages, 8 figures, accepted to J. Appl. Phy

Effect of lithium borate coating on the electrochemical properties of LiCoO2 electrode for lithium-ion batteries

The effect of a protective coating of fused lithium borate, Li3BO3, on the physicochemical and electrochemical characteristics of LiCoO2 has been studied. A cathode material produced by the SCS method using binary organic fuel, glycine and citric acid. The influence of the experiment conditions on the morphology, crystal structure and specific surface of lithium cobaltite was studied. Electrochemical testing of LiCoO2∙nLi3BO3 samples, n = 5 and 7 mass %, has been performed in the cathode Li|Li+-electrolyte|LiCoO2∙nLi3BO3 half-cell using 1M LiPF6 in EC/DMC mixture (1:1) as electrolyte in the 2.7-4.3 V range at normalized discharge current С/10, С/5, С/2. The maximal initial discharge capacity of 185 mAh/g was detected for the samples with 5 mass % Li3BO3. The coulomb efficiency of optimal materials in the 40th cycle was 99.1%

Observation of an Inverse Energy Cascade in Developed Acoustic Turbulence in Superfluid Helium

We report observation of an inverse energy cascade in second sound acoustic turbulence in He II. Its onset occurs above a critical driving energy and it is accompanied by giant waves that constitute an acoustic analogue of the rogue waves that occasionally appear on the surface of the ocean. The theory of the phenomenon is developed and shown to be in good agreement with the experiments.Comment: 4 pages, 5 figures. The final version just prior to publicatio

Effect of Lithium Borate Coating on the Electrochemical Properties of LiCoO2 Electrode for Lithium-Ion Batteries

Received: 13.10.2020. Revised: 18.11.2020. Accepted: 26.11.2020. Available online: 21.12.2020.This article belongs to the regular issue.The effect of a protective coating of fused lithium borate, Li3BO3, on the physicochemical and electrochemical characteristics of LiCoO2 has been studied. A cathode material produced by the SCS method using binary organic fuel, glycine and citric acid. The influence of the experiment conditions on the morphology, crystal structure and specific surface of lithium cobaltite was studied. Electrochemical testing of LiCoO2∙nLi3BO3 samples, n = 5 and 7 mass %, has been performed in the cathode Li|Li+-electrolyte|LiCoO2∙nLi3BO3 half-cell using 1M LiPF6 in EC/DMC mixture (1:1) as electrolyte in the 2.7-4.3 V range at normalized discharge current С/10, С/5, С/2. The maximal initial discharge capacity of 185 mAh/g was detected for the samples with 5 mass % Li3BO3. The coulomb efficiency of optimal materials in the 40th cycle was 99.1%.The work was performed in accordance with the state as-signments of the Institute of Chemistry of Solids of the Ural Branch of the RAS, No. AAAA-A19-119031890026-6 and No. АААА-А19-119102990044-6, the state assignment of the Institute of Problems of Chemical Physics of the RAS, No. АААА-А19-119061890019-5, and Thematic map No. 0089-2019-0007 «Functional materials for chemical power sources»