Semiconducting Metal Oxide Based Sensors for Selective Gas Pollutant Detection

A review of some papers published in the last fifty years that focus on the semiconducting metal oxide (SMO) based sensors for the selective and sensitive detection of various environmental pollutants is presented

Application of Ellipsometry to Control the Plasmachemical Synthesis of Thin TiONx Layers

Ellipsometry is often used to determine the characteristics of films. Ellipsometric studies may turn out to be ineffective because several solutions correspond to the same polarization angles. It is demonstrated that the ambiguity is not due to the physical limitations of the method but it has a purely mathematical character. So, additional information about the film is necessary to determine the absolute values of refractive index, attenuation, and thickness

Effect of Si-O-Si bonding structure in porous carbon-doped silicon dioxide films on plasma damage

Plasma modification of SiOCH low-k films is analyzed by means of Molecular Mechanics. It is shown that the most probable mechanism of SiOCH modification in He plasma is removal of hydrogen atoms from CH3 groups. The change of Si–O–Si bond angles depends on the amount of the formed –СН2* (СНх) groups. During the followed exposure in NH3 plasma, NH2* radicals bind СНх groups with Si forming a –CH– Si–O–Si–O–Si–O–Si– chain. The end of this chain gets bound to its beginning through NH2. This process is the reason of pore sealing.Link to paper: http://www.mrs.org/s_mrs/sec_subscribe.asp?CID=12434&DID=216990&action=detailstatus: publishe

Моделирование задней нестабильности в локтевом суставе при повреждении передних структур костей предплечья(экспериментальное исследование)

Authors made experiment to study conditions at which recurrent posterior dislocation of forearm bones occurs. Bone and soft tissue structures providing stability of elbow joint, necessary and sufficient conditions of its stabilization were studied. It is found out that the most important structure stabilizing an elbow joint is the forward portion of medial collateral ligament. Its damage against the background of bone fracture results in posterior dislocation. The biomechanical substantiation of efficiency of various techniques of operative treatment of old recurrent posterior dislocation of forearm bones is received.Проведен эксперимент с целью изучения условий, при которых возникает рецидивирующий задний вывих костей предплечья. Изучались костные и мягкотканные структуры, обеспечивающие стабильность локтевого сустава, необходимые и достаточные условия стабилизации локтевого сустава. Выяснено, что наиболее важной структурой, стабилизирующей локтевой сустав, является передняя порция медиальной коллатеральной связки, повреждение которой на фоне перелома костных структур, приводило к заднему вывиху. Получено биомеханическое обоснование эффективности различных методик оперативного лечения застарелого рецидивирующего заднего вывиха костей предплечья

Оперативное лечение застарелых вывихов и переломовывихов в локтевом суставе

Experience of treatment of 80 patients with old elbow dislocation and fracture-dislocation is presented. Reasons of medical errors at treatment of fresh dislocations of bones of forearm are analyzed. The authors describe basic methods of operations using at treatment of old elbow dislocation, indication (including elbow replacement), choice of operative access, difficulty and complications, long-term results.Представлен опыт лечения 80 больных с застарелыми вывихами и переломовывихами в локтевом суставе. Проанализированы причины ошибок при лечении свежих вывихов костей предплечья. Описаны основные виды оперативных вмешательств, применяемых при лечении застарелых вывихов в локтевом суставе, показания к ним (в том числе эндопротезирование локтевого сустава), выбор оперативного доступа, возникшие сложности при лечении, осложнения и отдаленные результаты

Geothermal zonality of Fore-Yenisei sedimentary basin

The relevance of the work is caused by the fact that the strata temperature is one of the major factors controlling the degree of transformation of scattered organic matter of rocks, gas and oil generation, formation and conservation of the deposits of hydrocarbons. It is the temperature on which the physicochemical properties and phase state of gases, oil and water depend under the in-situ conditions. Upper Precambrian-Paleozoic deposits of the Fore-Yenisei sedimentary basin are considered in recent years as one of the possible objects for the increment of the resource basis of hydrocarbons within the boundaries of the West Siberian oil-and-gas bearing province. At present, the region under investigation is insufficiently explored by drilling, so in the work we propose a geothermal model showing the character of changes in the strata temperature with depth and allowing us to predict the trends of temperature changes for difficultly accessible objects weakly provided with the actual data. The aim of the work is to reveal the geothermal features of Upper Precambrian-Paleozoic sediments of the Pre-Yenisei sedimentary basin, zoning and compilation of the geothermal model of the sedimentary fill of the basin. Methods of investigation. Geothermal parameters of the geological section were calculated; geothermal zoning of the territory was carried out on the basis of the geothermal gradient value. Using the structural maps over the major stratigraphical horizons and the regression dependences of the geothermal parameters with the depth, the grid models were developed with the help of GridBuilder and GridMaster software packages, as well as GS Surfer. Results. It was determined that the sections of the Upper Precambrian-Paleozoic sediments of the Pre-Yenisei sedimentary basin are comparable with the western regions of the Siberian Platform, both in rock composition and in geothermal conditions, and are characterized by decreased geothermal gradients (1,25-2,55 C/100 m). For the first time, the authors have developed the detailed geothermal model of sedimentary fill of the basin allowing us to predict the geothermal conditions of the sedimentary strata