Evolution of the zirconium alloy Zr-1Nb defect structure after cold rolling

Zirconium alloys are actively used in nuclear power engineering. During the operation of these alloys, it is necessary to know the change in structural, mechanical and physical characteristics when using material in corrosive environments. In this regard, it is necessary to study the occurrence of certain defects in the material and their effect. Such defects include dislocations. This study is aimed to study the processes of the appearance and distribution of dislocations in a material by positron annihilation spectroscopy. As a result of this work, the lifetime of positrons in the dislocation of zirconium was determined and the character of dislocation distribution at different degrees of deformation was presented

Genetic and Non-genetic Factors Associated With Constipation in Cancer Patients Receiving Opioids

Acknowledgments. We are grateful to all the researchers involved in The European Pharmacogenetic Opioid Study (EPOS) and to Gunnhild Jakobsen who organized the collection of data.Peer reviewedPublisher PD

Sleep quality with WHO Step III opioid use for cancer pain

Peer reviewedPostprin

Разработка технологии изготовления пробки

Выбор рациональных способов обработки, оборудования и режущих инструментов, расчёт приспособления, режимов резания и норм времени, размерный анализ техпроцесса изготовления пробкиThe choice of rational methods of processing, equipment and cutting tools, calculating the adaptation, cutting modes and time norms, dimensional analysis of the manufacturing process of the plu

Исследование зон усталостного разрушения шнеков

Шнек - основной рабочий орган машин для переработки отходов - экструдеров. От качества его изготовления зависит производительность цеха и целостность корпуса машины. При переработке многокомпонентного сырья, которым является Refuse Derived Fuel - это общее название альтернативных видов топлива, получаемых при переработке отходов. В качестве сырья используется практически любой органический материал: целлюлоза, резина, пластик, кожа, дерево, пищевые заменители. В исследовании использован пример на базе работы с RDF-сырьем Мусороперерабатывающего комбината "Янино", Ленинградская область. Именно при работе с такими высокоабразивными отходами возникает необходимость многократно повышать ресурс шнеков за счет использования новых технологий обработки металлов, так как в составе данного сырья могут встречаться металлические компоненты и трудно размалываемые силикаты.Screw - the main working organ of machines for processing waste - extruders. From the quality of its production depends the productivity of the shop and the integrity of the machine body. When refining a multicomponent raw material, which is Refuse Derived Fuel - this is the general name for alternative fuels obtained from recycling. As raw material, almost any organic material is used: cellulose, rubber, plastic, leather, its substitutes. The study used an example based on work with RDF-raw materials of the Janino Refuse Processing Plant. Leningrad region. It is when working with such highly abrasive waste that it becomes necessary to increase the service life of screw augmentedly by using new processing technologies, since metal components and hard-to-break silicates can occur in the composition of this raw material

Failure of Autologous Fresh Frozen Plasma to Reduce Blood Loss and Transfusion Requirements in Coronary Artery Bypass Surgery

Background: Previous studies failed to demonstrate any benefit from prophylaxis with fresh frozen plasma (FFP) after cardiopulmonary bypass (CPB). The results, however, were limited by either retrospective study design or use of FFP in subtherapeutic doses (2-3 units). The authors evaluated whether a therapeutic dose (15 ml/kg) of FFP reduces blood loss and transfusion requirements in elective coronary artery bypass surgery. The risks of multiple allogeneic blood donor exposure were circumvented by using autologous plasma. Methods: Sixty adult patients scheduled for elective primary coronary artery bypass grafting were randomized to receive, after CPB, an intravenous infusion of 15 ml/kg of either autologous FFP (30 patients) or 6% hydroxyethyl starch 450/0.7 (HES; 30 patients). Autologous plasma was obtained by plateletpoor plasmapheresis several weeks before surgery. Perioperative blood transfusions were administered per protocol. Postoperative blood loss was defined as the chest tube drainage during the first 24 h after surgery. Results: The data from 56 patients (FFP group, 27 patients; HES group, 29 patients) who completed the study according to protocol were analyzed. Median postoperative blood loss was 630 ml (range, 450 -1,840 ml) and 830 ml (range, 340 -1,980 ml) in the FFP and HES groups, respectively (P ‫؍‬ 0.08). Both postoperative (0 -24 h) and total perioperative erythrocyte transfusion requirements did not differ significantly between the groups (P ‫؍‬ 0.32 and 0.14, respectively). Conclusion: The prophylactic administration of a therapeutic dose (15 ml/kg) of autologous FFP after CPB failed to reduce blood loss and transfusion requirements in patients undergoing uncomplicated, elective, primary coronary artery bypass surgery