Physics and Chemistry of the Hydrogen Fluoride Production Process from Fluorine Containing Waste

The impact of the aluminum industry wastes on the environment is established. The resource efficient method of aluminum industry fluorine-containing wastes processing, which includes wastes oxidizing roasting to remove carbon component and the interaction of fluorine- containing particles with sulfuric acid in order to produce hydrogen fluoride, is considered. The economic and environmental effect of the proposed processing method is substantiated

Comparative analysis of hemodynamic characteristics of the biological xenogenic pericardial prosthesis MEDINGE-BIO with “easy change” system and the xenogenic aortic prosthesis Hancock II after aortic valve replacement

Aim. To compare the outcomes of aortic valve replacement using the xenogenic aortic prosthesis Hancock II and the novel Russian xenogenic pericardial prosthesis MEDINGE-BIO.Material and methods. The study included patients operated on for aortic stenosis in the cardiac surgery department № 1 of the Cardiology Research Institute (Tomsk National Research Medical Center). All patients were divided into two groups. The first group included 54 patients with Hancock II prostheses, the second — 91 patients with MEDINGE-BIO prostheses. Hemodynamic characteristics of heart valves were assessed by echocardiography before surgery and before discharge (on average 10 days after surgery).Results. When comparing hemodynamic parameters before and after surgery, significant differences between the groups were not obtained. The average pressure gradient after surgery using Hancock II and MEDINGE-BIO prosthesis was 21,6±7,9 and 17,9±5,6 mm Hg, respectively (p=0,05).Conclusion. The comparative analysis showed that the novel biological prosthesis MEDINGE-BIO has comparable hemodynamic characteristics with the well-known aortic prosthesis Hancock II

Внутрикостная химиотерапия в лечении инвазивного рака мочевого пузыря

Neoadjuvant chemotherapy (CT) with cisplatin administered intraosseously into the pubic bone in patients with invasive bladder carcinoma (Т2—4N0M0) was most effective in patients with circular involvement of the bladder neck, even in large tumors of 5—7 cm. Out of 4 patients with this site of a tumor, full regression without further treatment was achieved in one patient, transurethral resection was performed in 3 patients with 75% tumor regression. In multiple bladder tumor lesions involving the bladder neck, the degree of regression was not greater than 40%. The therapeutic efficiency of intraosseous CT with cisplatin was 54% with acceptable toxicity.

Первый клинический случай имплантации составного каркасного ксеноперикардиального биопротеза в митральную позицию

The article presents the first clinical case of the implantation of a composite frame xenopericardial bioprosthesis “MedEng-Bio” in the mitral position. The special design of the prosthesis implantation procedure simplifies and reduces the risks associated with possible repeated operations.В статье представлен первый клинический случай имплантации составного каркасного ксеноперикардиального биопротеза «МедИнж-Био» в митральную позицию. Особая конструкция протеза упрощает процедуру имплантации и позволяет уменьшить риски при возможных повторных операциях

ИТОГИ РЕАЛИЗАЦИИ МЕРОПРИЯТИЙ, НАПРАВЛЕННЫХ НА СОВЕРШЕНСТВОВАНИЕ ОКАЗАНИЯ МЕДИЦИНСКОЙ ПОМОЩИ БОЛЬНЫМ С СОСУДИСТЫМИ ЗАБОЛЕВАНИЯМИ НА ТЕРРИТОРИИ ТОМСКОЙ ОБЛАСТИ В 2012 г.

Acute disorders of cerebral circulation remain serious medical and social problem associated with high disability and mortality rates. Since 2011 Tomsk oblast is a participating member of the medical campaign aimed at improved medical services to the vascular patients. The preliminary implementation data analysis for 2012 revealed improvement of most of the indices of medical support to patients suffering from acute cerebral circulation; increased number of the in-patient cases (Regional Vascular Center and primary vascular department), decreased lethality rates from strokes, specifically hemorrhagic cases. Strict observance of the Regulations on Medical Assistance for stroke patients and the using of modern methods of therapy allowed to decrease hospital mortality in the Primary Vascular Departments and early mortality in the Regional Vascular Center. The active implementation of neurorehabilitation approaches resulted in the increased number of patients who do not require third parties’ assistance. Analysis of the work of the departments helped to identifying current problems and perspectives of further development of special medical care for stroke patients.Острые нарушения мозгового кровообращения (ОНМК) остаются актуальной медицинской и социальной проблемой с высокими показателями смертности и инвалидизации населения. С 2011 Томская область вошла в число участников мероприятий, направленных на совершенствование оказания медицинской помощи больным с сосудистыми заболеваниями. Анализ предварительных результатов реализации данных мероприятий за 2012 показал улучшение большинства показателей, характеризующих состояние медицинской помощи больным с ОНМК: повысился процент пациентов, госпитализированных в специализированные отделения (региональный сосудистый центр и первичные сосудистые отделения), снизилась летальность от инсультов, особенно от геморрагических типов. Строгое выполнение утвержденных порядков помощи больным с ОНМК и использование современных методик лечения инсульта в сосудистых отделениях позволило снизить госпитальную летальность в первичных сосудистых отделениях и раннюю летальность в региональном сосудистом центре. Активное применение нейрореабилитационных мероприятий привело к повышению доли пациентов, не зависимых от окружающих при выписке. Анализ показателей работы отделений позволил обозначить существующие проблемы и перспективы дальнейшего развития специализированной медицинской помощи данной категории больных.

Designing asynchronous sequential circuits for random pattern testability

A resurgence of interest in asynchronous VLSI circuits is occurring because of their poten-tial for low power consumption, design flexibility and the absence of the clock skew prob-lem. In this paper, an approach to the design of asynchronous sequential circuits for random pattern testability based on the micropipeline design style is described. The test procedure for such asynchronous sequential circuits provides for the separate testing of the combina-tional logic block and the memory elements. The total number of random test patterns required to detect all the stuck-at faults in the data processing blocks and control blocks is determined by the total number of tests for the combinational logic block. A case study of a register destination decoder designed for random pattern testability is presented to demon-strate the practicability of the proposed design approach

Intraosseous chemotherapy in the treatment of invasive bladder carcinoma

Neoadjuvant chemotherapy (CT) with cisplatin administered intraosseously into the pubic bone in patients with invasive bladder carcinoma (Т2—4N0M0) was most effective in patients with circular involvement of the bladder neck, even in large tumors of 5—7 cm. Out of 4 patients with this site of a tumor, full regression without further treatment was achieved in one patient, transurethral resection was performed in 3 patients with 75% tumor regression. In multiple bladder tumor lesions involving the bladder neck, the degree of regression was not greater than 40%. The therapeutic efficiency of intraosseous CT with cisplatin was 54% with acceptable toxicity

ACTIVITIES RESULTS AIMED AT IMPROVED MEDICAL ASSISTANCE TO THE VASCULAR PATIENTS IN TOMSK REGION

Acute disorders of cerebral circulation remain serious medical and social problem associated with high disability and mortality rates. Since 2011 Tomsk oblast is a participating member of the medical campaign aimed at improved medical services to the vascular patients. The preliminary implementation data analysis for 2012 revealed improvement of most of the indices of medical support to patients suffering from acute cerebral circulation; increased number of the in-patient cases (Regional Vascular Center and primary vascular department), decreased lethality rates from strokes, specifically hemorrhagic cases. Strict observance of the Regulations on Medical Assistance for stroke patients and the using of modern methods of therapy allowed to decrease hospital mortality in the Primary Vascular Departments and early mortality in the Regional Vascular Center. The active implementation of neurorehabilitation approaches resulted in the increased number of patients who do not require third parties’ assistance. Analysis of the work of the departments helped to identifying current problems and perspectives of further development of special medical care for stroke patients

The first clinical case of implantation of a composite frame xenopericardial bioprosthesis “MedEng-Bio” in the mitral position

The article presents the first clinical case of the implantation of a composite frame xenopericardial bioprosthesis “MedEng-Bio” in the mitral position. The special design of the prosthesis implantation procedure simplifies and reduces the risks associated with possible repeated operations

Фторидная переработка катализатора крекинга углеводородов нефти с извлечением концентрата РЗЭ

It is proposed to use a spent cracking catalyst of petroleum hydrocarbons containing 1 wt.% of rare earth element (REE) oxides as an alternative REE feed source. The study covers the process of removing silicon in the form of ammonium hexafluorosilicate (NH4)2SiF6 by sintering an oil cracking catalyst sample with NH4F and subsequent (NH4)2SiF6 sublimation to produce an aluminum-containing concentrate of rare earth elements. The orthogonal central compositional planning of the experiment was used to study the effect of three factors: sublimation temperature (350 to 400 °С), duration (40 to 80 min), and weight of the catalyst fluorinated sintered mass (5 to 10 g) on the (NH4)2SiF6 sublimation completeness. Results obtained in the experiment were used to build a second-order model, which correlate with experimental data. The dynamics of (NH4)2SiF6 sublimation removal was determined for sublimation durations of τ = 10, 20, 40 and 80 min at processing temperatures of 350, 375 and 400 °C. The (NH4)2SiF6 removal degree values calculated based on the second-order model for τ = 44, 48, 52, 56, 60, 64, 68, 72, and 76 min fit well the experimental curves. Spectra of fluorinated catalyst samples before and after sublimation were studied using X-ray phase analysis and IR spectroscopy. The data of IR spectroscopy and X-ray phase analysis are in good agreement and show that (NH4)2SiF6, (NH4)3AlF6 and unreacted NH4F are present in the catalyst with NH4F sintered mass, and only aluminum compounds are detected – NH4AlF4 and AlF3 after sublimation. These data indicate the completeness of the sublimation removal of silicon from the catalyst and NH4F sintered mass with NH4AlF4 and AlF3 aluminum compounds only observed after sublimation. REE concentration is 15 % due to silicon removal.В качестве альтернативного сырьевого источника редкоземельных элементов (РЗЭ) предлагается использовать отработанный катализатор крекинга (ОКК) углеводородов нефти, содержащий 1 мас.% оксидов РЗЭ. Был изучен процесс удаления кремния в форме гексафторосиликата аммония – (NH4)2SiF6 – путем спекания образца катализатора крекинга нефти с NH4F и последующей сублимации (NH4)2SiF6, в результате чего получен алюминийсодержащий концентрат редкоземельных элементов. С использованием ортогонального центрального композиционного планирования (ОЦКП) эксперимента изучено влияние трех факторов: температуры сублимации (от 350 до 400 °С), ее продолжительности (от 40 до 80 мин) и массы фторидного спека катализатора (от 5 до 10 г) – на полноту процесса сублимации (NH4)2SiF6. По результатам эксперимента построена модель второго порядка, коррелирующая с экспериментальными данными. Также была определена динамика сублимационного удаления (NH4)2SiF6 для времени сублимации τ = 10, 20, 40 и 80 мин при температурах обработки 350, 375 и 400 °С. Рассчитанные по модели второго порядка значения степени удаления (NH4)2SiF6 для τ = 44, 48, 52, 56, 60, 64, 68, 72 и 76 мин хорошо ложатся на экспериментальные кривые. Изучены спектры образцов фторированного катализатора до и после сублимации методами рентгенофазового анализа (РФА) и ИК-спектроскопии. Данные ИК-спектроскопии и РФА хорошо со- гласуются и показывают, что в спеке ОКК с NH4F присутствуют (NH4)2SiF6, (NH4)3AlF6 и непрореагировавший NH4F, а после сублимации обнаруживаются только соединения алюминия – NH4AlF4 и AlF3. За счет удаления кремния концентрирование РЗЭ составляет 15 %