АВТОМАТИЗАЦИЯ ПРОЦЕССА УПРАВЛЕНИЯ КАЧЕСТВОМ ТОПЛИВА НА ТЕПЛОВыХ ЭЛЕКТРОСТАНЦИЯХ

Проведено аналіз розвитку котлобудування, який показав загальну тенденцію використання прогресивних конструктивних рішень. Застосування вторинних випромінювачів впливає на спосіб спалювання органіч- них палив. За появи внутрішньої рециркуляції зменшується кількість повітря на згоряння та досягається 2…5% його економія при зниженні шкідливих викидів CO та NOx на 30…50%. Проведен анализ развития котлостроения, который показывает общую тенденцию применения про- грессивных конструктивных решений. Предлагаемое использование вторичных излучателей позволяет изменить способ сжигания органических топлив. За счёт появления внутренней рециркуляции достига- ется 2…5 % экономия топлива при снижении выбросов CO и NOx на 30…50%

Mathematical modeling of mixed convection in a closed rectangular area in conditions of lower boundary radiant heating

Mathematical modeling of mixed convection in a closed rectangular area in conditions of lower boundary radiant heating is passed. Fields of temperatures and stream functions for different Grashof numbers are obtained. The scale influence of Grashof number increasing on the heat transfer intensity is shown. It is founded that the process of closed areas radiant heating has significantly unsteady nature

IN VITRO INDUCTION OF TUMOR-SPECIFIC IMMUNITY : I. PARAMETERS OF ACTIVATION AND CYTOTOXIC REACTIVITY OF MOUSE LYMPHOID CELLS IMMUNIZED IN VITRO AGAINST SYNGENEIC AND ALLOGENEIC PLASMA CELL TUMORS

Induction of tumor-specific immunity in vitro was accomplished by cocultivation of cortisone-resistant murine thymocytes or spleen cells with irradiated syngeneic plasma cell tumors (PCT). The cytotoxic activity generated could be detected in a short-term 51Cr-release assay. Optimal cytotoxic activity against PCT-associated transplantation antigens (TATA) was generated after 7 days in culture. Unlike cytotoxic responses to tumor allografts in which the cytotoxic activity was directed against allogeneic transplantation antigens, the cytotoxic activity obtained in the syngeneic tumor system was specific to the immunizing syngeneic PCT. Similar parameters of induction of cytotoxic responses in in vitro tumor allograft responses and in the syngeneic tumor system suggested that both reactions are cell-mediated cytotoxic immune responses. With regard to the magnitude of cytotoxic responses obtained, allogeneic transplantation antigens induced about a 30-fold higher cytotoxic immune response than plasma cell TATA. The results are consistent with the concept that in vitro tumor allograft responses and in vitro responses against TATA of PCT are similar in quality, but differ in the magnitude of the cytotoxic response provoked