141 research outputs found
Single spin asymmetry measurements for inclusive productions in and \pi^-+\p_{\uparrow}\to \pi^0+X reactions at 70 and 40 GeV respectively
The inclusive asymmetries were measured in reactions and at 70 and 40 GeV/c respectively. The
measurements were made at the central region (for the first reaction) and
asymmetry is compatible with zero in the entire measured region. For the
second reaction the asymmetry is zero for small region () and increases with growth of . Averaged
over the interval the asymmetry was .Comment: 4 pages, 2 figures; Presented at SPIN-2004 at Trieste, October
10-16,200
Abundance and Taxonomic Composition of Bacterioplankton in Freshwater Lake Gusinoye (Buryatia) in the Warm Water Zone of the Gusinoozerskaya Thermal Power Plant
The abundance and taxonomic composition of bacterioplankton was determined in different parts of Lake Gusinoyе, which is the largest freshwater lake in Buryatia (Russia) and is used as a cooling reservoir for the Gusinoozerskaya thermal power plant (TPP). The lake is also used as a public water supply and for commercial fishing. The chemical composition of water in the warm water discharge channel did not differ from that in the lake. The total number of bacteria in the water ranged from 0.1 to 2.5 million cells/ml; the maximum counts of bacterial cells were obtained close to the mouth of the Zagustai River, where household effluents are discharged. Seasonal dynamics showed an increase in bacterial numbers that corresponded with the spring peak of phytoplankton development in May. The maximum numbers of organotrophic bacteria were observed in the warm water discharge channel, the point of its influx into the lake and near the inflowing rivers’ mouths. There were no significant differences between the number of bacteria in the zones subjected to and those not subjected to the thermal impact of the power plant. However, total abundance and numbers of organotrophic bacteria were higher in the warm water discharge channel and in the mouth areas of the rivers. This observation suggests that a “barrier zone” with increased number and activity of microorganisms, typical of river mouths, may also be formed in the discharge channel. The patterns of bacterioplankton diversity in the parts of the lake exposed to the thermal pressure were similar. The phyla Cyanobacteria (average 28%), Actinobacteria (average 28%) and Proteobacteria (average 22%), Firmicutes (average 9%) and Bacteroidetes (average 7%) dominated. The peculiarity of the taxonomic composition of this community was the dominance of the phyla Cyanobacteria and Actinobacteria, which indicates that production and destruction processes can be intensifie
Численность и таксономический состав бактериопланктона в пресном озере Гусиное (Бурятия) в зоне влияния теплых вод Гусиноозерской ГРЭС
The abundance and taxonomic composition of bacterioplankton was determined in different parts of Lake Gusinoyе, which is the largest freshwater lake in Buryatia (Russia) and is used as a cooling reservoir for the Gusinoozerskaya thermal power plant (TPP). The lake is also used as a public water supply and for commercial fishing. The chemical composition of water in the warm water discharge channel did not differ from that in the lake. The total number of bacteria in the water ranged from 0.1 to 2.5 million cells/ml; the maximum counts of bacterial cells were obtained close to the mouth of the Zagustai River, where household effluents are discharged. Seasonal dynamics showed an increase in bacterial numbers that corresponded with the spring peak of phytoplankton development in May. The maximum numbers of organotrophic bacteria were observed in the warm water discharge channel, the point of its influx into the lake and near the inflowing rivers’ mouths. There were no significant differences between the number of bacteria in the zones subjected to and those not subjected to the thermal impact of the power plant. However, total abundance and numbers of organotrophic bacteria were higher in the warm water discharge channel and in the mouth areas of the rivers. This observation suggests that a “barrier zone” with increased number and activity of microorganisms, typical of river mouths, may also be formed in the discharge channel. The patterns of bacterioplankton diversity in the parts of the lake exposed to the thermal pressure were similar. The phyla Cyanobacteria (average 28%), Actinobacteria (average 28%) and Proteobacteria (average 22%), Firmicutes (average 9%) and Bacteroidetes (average 7%) dominated. The peculiarity of the taxonomic composition of this community was the dominance of the phyla Cyanobacteria and Actinobacteria, which indicates that production and destruction processes can be intensifiedОпределены численность и таксономический состав бактериопланктона в различных участках крупнейшего в Республике Бурятия пресного озера Гусиное, которое является водоемом-охладителем Гусиноозерской ГРЭС, также используется для хозяйственно-питьевого водоснабжения и в рыбохозяйственных целях. По химическому составу вод не выявлено отличий между сбросным каналом теплых вод и акваторией озера. Общая численность бактерий в воде озера колебалась от 0.1 до 2.5 млн. кл/мл, максимальные значения выявлены около устья реки Загустай, где происходит сброс очищенных сточных бытовых вод. В сезонной динамике наблюдалось увеличение численности почти на всех станциях в мае, в весенний пик развития фитопланктона. Максимальная численность органотрофных бактерий обнаружена в сбросном канале теплых вод и месте впадения сбросного канала в озеро, а также в местах вблизи впадения в озеро рек. Явных различий по показателям численности бактерий между зоной теплового влияния ГРЭС и зоной, не подверженной тепловому влиянию, не наблюдалось. Можно отметить увеличение численности микроорганизмов в термальном сбросном канале и в участках около устьев рек. Возможно, в сбросном канале образуется «барьерная зона», характерная для устьев рек и характеризующаяся увеличением численности и активности микроорганизмов. Разнообразие бактериопланктона в участках озера, подвергающихся тепловому прессу, было схожим. В составе сообщества доминировали представители филумов Cyanobacteria (в среднем 28%), Actinobacteria (в среднем 28%) и Proteobacteria (в среднем 22%), Firmicutes (в среднем 9%) и Bacteroidetes (7%). Особенностью таксономического состава сообщества было доминирование филумов Cyanobacteria и Actinobacteria, что указывает на возможную интенсификацию процессов продукции и деструкци
The pp elastic scattering analyzing power measured with the polarized beam and the unpolarized target between 1.98 and 2.80 GeV
Factor XI promotes hemostasis in factor IX-deficient mice
Essentials Mice lacking factor IX (FIX) or factor XI (FXI) were tested in a saphenous vein bleeding model. FIX-deficient mice displayed a hemostatic defect and FXI-deficient mice were similar to wild type mice. Infusion of FXI or over-expression of FXI in FIX-deficient mice improved hemostasis. FXI may affect the phenotype of FIX-deficiency (hemophilia B). Summary: Background In humans, deficiency of coagulation factor XI may be associated with a bleeding disorder, but, until recently, FXI-deficient mice did not appear to have a hemostatic abnormality. A recent study, however, indicated that FXI-deficient mice show a moderate hemostatic defect in a saphenous vein bleeding (SVB) model. Objectives To study the effect of FXI on bleeding in mice with normal levels of the FXI substrate FIX and in mice lacking FIX (a murine model of hemophilia B). Methods Wild-type mice and mice lacking either FIX (F9−) or FXI (F11−/−) were tested in the SVB model. The plasma levels of FXI in F11−/− mice were manipulated by infusion of FXI or its active form FXIa, or by overexpressing FXI by the use of hydrodynamic tail vein injection. Results F9− mice showed a significant defect in the SVB model, whereas F11−/− mice and wild-type mice were indistinguishable. Intravenous infusion of FXI or FXIa into, or overexpression of FXI in, F9− mice improved hemostasis in the SVB model. Overexpression of a FXI variant lacking a FIX-binding site also improved hemostasis in F9− mice. Conclusions Although we were unable to demonstrate a hemostatic defect in F11−/− mice in the SVB model, our results support the premise that supraphysiological levels of FXI improve hemostasis in F9− mice through FIX-independent pathways
- …