Science.gov

Sample records for dinamika izmeneniya kontsentratsii

  1. Dynamics of a Plasmacytic Reaction when Tetanus Antitoxin is Introduced by Aerosol and Subcutaneously (Dinamika Plazmotsitarnoi Reaktsii pri Vvedenii Stolbnyanogo Anatoksina Aerozolnym i Podkozhnym Metodom)

    DTIC Science & Technology

    typhoid fever antigen. Results are compared with those of the fever antigens alone. Comparisons are made between reactions of local lymph nodes and those remote from the place of antitoxin introduction.

  2. Zeta potential response of human erythrocyte membranes to the modulators of Gardos channel activity under low rate β-radiation.

    PubMed

    Zhirnov, V V; Iakovenko, I N; Voitsitskiy, V M; Khyzhnyak, S V; Zubrikova-Chugainova, O G; Gorobetz, V A

    2015-12-01

    Tsel' raboty. Izuchenie reaktsii dzeta potentsiala (DP) membran éritrotsitov cheloveka pri modifikatsii aktivatorami i blokatorami funktsional'nogo sostoianiia Ca2+-zavisimykh kalievykh kanalov v pole radioizotopnogo izlucheniia 90Sr/90Y maloi moshchnosti.Materialy i metody. Éritrotsity poluchali iz donorskoi krovi. DP vychisliali po poluchennomu znacheniiu élektroforeticheskoi podvizhnosti kletok. V kletochnye suspenzii predvaritel'no vnosili issleduemye veshchestva, a zatem alikvoty rastvora 90Sr(NO3)2, chtoby poluchit' konechnuiu kontsentratsiiu 44,4⋅kBk⋅l-1.Rezul'taty. Radioizotopnoe izluchenie 90Sr/90Y (RI, 15 mkGr/ch) povyshaet absoliutnoe znachenie DP (DPab) membran éritrotsitov i ego deistvie iavliaetsia obratimym. Éto ukazyvaet na to, chto éffekt oposreduetsia neioniziruiushchei komponentoi RI. Dibutiril-tsAMF v diapazone kontsentratsii 1–100 mkM dozonezavisimo povyshaet DPab membran éritrotsitov, no RI ne usilivaet ego éffekt. Anaprilin v kontsentratsiiakh 10 i 100 mkM dozonezavisimo povyshaet DPab. Éffekt maksimal'noi kontsentratsii anaprilina (100 mkM) – snizhaetsia RI. Klotrimazol v diapazone kontsentratsii 0,1–10 mkM povyshaet DPab membran éritrotsitov otnositel'no kontrolia, togda kak ego maksimal'naia kontsentratsiia – snizhet, a minimal'naia – dostoverno ne vliiaet na étot pokazatel'. Deistvie klotrimazola na DP pri kontsentratsiiakh 10–100 mkM otmeniaetsia RI, no ne izmeniaetsia pri 0,1–1 mkM. Nitrendipin vo vsem diapazone kontsentratsii dozonezavisimo povyshaet DPab membran éritrotsitov, a RI usilivaet ego deistvie. Vyvody. 1. Dlia ioniziruiushchei komponenty radionuklidnogo izlucheniia sushchestvuet porog biologicheskogo deistviia na kletki, opredeliaemyi éffektivnost'iu ikh antioksidantnoi sistemy.2. Pri moshchnosti doz nizhe porogovoi deistvie radioizotopnogo izlucheniia oposreduetsia ego neioniziruiushchei komponentoi i iavliaetsia obratimym, a poétomu opredeliaetsia tol'ko v pole izlucheniia.

  3. ISP33 standard problem on the PACTEL facility

    SciTech Connect

    Purhonen, H.; Kouhia, J.; Kalli, H.

    1995-09-01

    ISP33 is the first OECD/NEA/CSNI standard problem related to VVER type of pressurized water reactors. The reference reactor of the PACTEL test facility, which was used to carry out the ISP33 experiment, is the VVER-440 reactor, two of which are located near the Finnish city of Loviisa. The objective of the ISP33 test was to study the natural circulation behaviour of VVER-440 reactors at different coolant inventories. Natural circulation was considered as a suitable phenomenon to focus on by the first VVER related ISP due to its importance in most accidents and transients. The behaviour of the natural circulation was expected to be different compared to Western type of PWRs as a result of the effect of horizontal steam generators and the hot leg loop seals. This ISP was conducted as a blind problem. The experiment was started at full coolant inventory. Single-phase natural circulation transported the energy from the core to the steam generators. The inventory was then reduced stepwise at about 900 s intervals draining 60 kg each time from the bottom of the downcomer. the core power was about 3.7% of the nominal value. The test was terminated after the cladding temperatures began to rise. ATHLET, CATHARE, RELAP5 (MODs 3, 2.5 and 2), RELAP4/MOD6, DINAMIKA and TECH-M4 codes were used in 21 pre- and 20 posttest calculations submitted for the ISP33.

  4. Experimental and Numerical Study of Swirling Flows and Flame Dynamics

    NASA Astrophysics Data System (ADS)

    Abricka, M.; Barmina, I.; Valdmanis, R.; Zake, M.

    2014-08-01

    The effect of swirling air on the flow dynamics was investigated for the cold non-reacting flows and the flame arising at thermo-chemical conversion of biomass pellets downstream of a cylindrical channel. Under experimental and numerical investigation was the swirling flow dynamics with the primary axial air supply below a biomass layer and swirling air supply above it. The results indicate that for cold flows the swirling air jet outflow from tangential nozzles leads to the formation of a complex flow dynamics which is influenced both by upstream and downstream air swirl propagation near the channel walls, with correlating swirl-enhanced formation of the upstream and downstream axial flows close to the flow centreline depending on the swirling air supply rate. These axial flows can be completely balanced at their stagnation within the axial recirculation zone. It is shown that at equal boundary conditions for the swirling flame and the cold flows the swirling flow dynamics is influenced by the upstream air swirl-enhanced mixing of the reactants below the air swirl nozzles. This determines the formation of a downstream reaction zone with correlating development of the flow velocity, temperature and composition profiles in the downstream flame regions with improved combustion stability. The low swirl intensity in these regions prevents the formation of a recirculation zone Ir veikti kompleksi aukstu nereaģējošu un liesmas virpuļplūsmu dinamikas veidošanās eksperimentālie pētījumi, izvērtējot galvenos faktorus, kas ietekmē šo plūsmu dinamikas veidošanos cilindriskā kanālā virs granulēta biomasas slāņa pie aksiālas primārā gaisa padeves zem granulu slāņa un gaisa virpuļplūsmas padeves virs tā. Auksto virpuļplūsmu pētījumi apliecina, ka plūsmas dinamiku būtiski ietekmē divu savstarpēji konkurējošu un pretēji vērstu virpuļplūsmu veidošanās pie tangenciālās gaisa padeves sprauslas izejas. Lejupvērstā virpuļplūsma, kas