805 research outputs found
Global three-neutrino oscillation analysis of neutrino data
A global analysis of the solar, atmospheric and reactor neutrino data is
presented in terms of three-neutrino oscillations. We include the most recent
solar neutrino rates of Homestake, SAGE, GALLEX and GNO, as well as the recent
1117 day Super-Kamiokande data sample, including the recoil electron energy
spectrum both for day and night periods and we treat in a unified way the full
parameter space for oscillations, correctly accounting for the transition from
the matter enhanced (MSW) to the vacuum oscillations regime. Likewise, we
include in our description conversions with . For the
atmospheric data we perform our analysis of the contained events and the
upward-going -induced muon fluxes, including the previous data samples of
Frejus, IMB, Nusex, and Kamioka experiments as well as the full 71 kton-yr
(1144 days) Super-Kamiokande data set, the recent 5.1 kton-yr contained events
of Soudan2 and the results on upgoing muons from the MACRO detector. We first
present the allowed regions of solar and atmospheric oscillation parameters
, and , ,
respectively, as a function of and determine the constraints from
atmospheric and solar data on the mixing angle , common to solar
and atmospheric analyses. We also obtain the allowed ranges of parameters from
the full five-dimensional combined analysis of the solar, atmospheric and
reactor data.Comment: 56 pages, 21 postscript figures. Some misprints corrected and new
references added. Chooz limit included in Fig.21. Final version to appear in
Phys. Rev.
Seasonal Dependence in the Solar Neutrino Flux
MSW solutions of the solar neutrino problem predict a seasonal dependence of
the zenith angle distribution of the event rates, due to the non-zero latitude
at the Super-Kamiokande site. We calculate this seasonal dependence and compare
it with the expectations in the no-oscillation case as well as just-so
scenario, in the light of the latest Super-Kamiokande 708-day data. The
seasonal dependence can be sizeable in the large mixing angle MSW solution and
would be correlated with the day-night effect. This may be used to discriminate
between MSW and just-so scenarios and should be taken into account in refined
fits of the data.Comment: 4 pages, latex, RevTeX, two postscript figure
Anti-Advanced glycation end-product and free radical scavenging activity of plants from the yucatecan flora
Background: Formation and accumulation of advanced glycation end-products (AGE) is recognized as a major pathogenic process in diabetic complications, atherosclerosis and cardiovascular diseases. In addition, reactive oxygen species and free radicals have also been reported to participate in AGE formation and in cell damage. Natural products with antioxidant and antiAGE activity have great therapeutic potential in the treatment of diabetes, hypertension and related complications. Objective: to test ethanolic extracts and aqueous-traditional preparations of plants used to treat diabetes, hypertension and obesity in Yucatecan traditional medicine for their anti-AGE and free radical scavenging activities. Materials and Methods: ethanolic extracts of leaves, stems and roots of nine medicinal plants, together with their traditional preparations, were prepared and tested for their anti-AGE and antioxidant activities using the inhibition of advanced glycation end products and DPPH radical scavenging assays, respectively. Results: the root extract of C. fistula (IC50= 0.1 mg/mL) and the leaf extract of P. auritum (IC50= 0.35 mg/mL) presented significant activity against vesperlysine and pentosidine-like AGE. Although none of the aqueous traditional preparations showed significant activity in the anti-AGE assay, both the traditional preparations and the ethanolic extracts of E. tinifolia, M. zapota, O. campechianum and P. auritum showed significant activity in the DPPH reduction assay. <65Conclusions: the results suggest that the metabolites responsible for the detected radical-scavenging activity are different to those involved in inhibiting AGE formation; however, the extracts with antioxidant activity may contain other metabolites which are able to prevent AGE formation through a different mechanism
Neutrinoless Double Beta Decay in Light of SNO Salt Data
In the SNO data from its salt run, probably the most significant result is
the consistency with the previous results without assuming the 8B energy
spectrum. In addition, they have excluded the maximal mixing at a very high
confidence level. This has an important implication on the double beta decay
experiments. For the inverted or degenerate mass spectrum, we find
|_{ee}| > 0.013 eV at 95% CL, and the next generation experiments can
discriminate Majorana and Dirac neutrinos if the inverted or degenerate mass
spectrum will be confirmed by the improvements in cosmology, tritium data beta
decay, or long-baseline oscillation experiments.Comment: REVTEX4, three figures. Now uses the updated SK atmospheric data
rather than naive rescaling. Conclusion unchanged. References adde
SEOM clinical guidelines in early stage breast cancer (2018)
Breast cancer is the most common cancer in women in our country and it is usually diagnosed in the early and potentially curable stages. Nevertheless, around 20–30% of patients will relapse despite appropriate locoregional and systemic therapies. A better knowledge of this disease is improving our ability to select the most appropriate therapy for each patient with a recent diagnosis of an early stage breast cancer, minimizing unnecessary toxicities and improving long-term efficacy
Partitioning of trace elements in a entrained flow IGCC plant: Influence of selected operational conditions
The partitioning of trace elements and the influence of the feed conditions (50:50 coal/pet-coke feed blend and limestone addition) was investigated in this study. To this end feed fuel, fly ash and slag samples were collected under different operational conditions at the 335 MW Puertollano IGCC power plant (Spain) and subsequently analysed. The partitioning of elements in this IGCC plant may be summarised as follows: (a) high volatile elements (70–>99% in gas phase): Hg, Br, I, Cl and S; (b) moderately volatile elements (up to 40% in gas phase and 60% in fly ash): As, Sb, Se, B, F, Cd, Tl, Zn and Sn; (c) elements with high condensation potential: (>90% in fly ash): Pb, Ge, Ga and Bi; (d) elements enriched similarly in fly ash and slag 30–60% in fly ash: Cu, W, (P), Mo, Ni and Na; and (e) low volatile elements (>70% in slag): Cs, Rb, Co, K, Cr, V, Nb, Be, Hf, Ta, Fe, U, Ti, Al, Si, Y, Sr, Th, Zr, Mg, Ba, Mn, REEs, Ca and Li. The volatility of As, Sb, and Tl and the slagging of S, B, Cl, Cd and low volatile elements are highly influenced by the fuel geochemistry and limestone dosages, respectively
Final report : SIM comparison in mass standards SIM.M.M-K5
This report summarizes the results of a SIM comparison in masss carried out between 7 NMIs. Five mass standards with nominal values 2 kg, 200 g, 50 g, 1 g and 200 mg have been circulated by the NMIs. The results reported by the participants are consistent with each other and with the key comparison reference valu of the comparison CCM.M-K5 to which the present comparison has been linked.Fil: Becerra, L. O. Centro Nacional de Metrología (CENAM); MéxicoFil: Peña, L. M. Centro Nacional de Metrología (CENAM); MéxicoFil: Luján, L. Centro Nacional de Metrología (CENAM); MéxicoFil: Díaz, J. C. Centro Nacional de Metrología (CENAM); MéxicoFil: Centeno, , L. M. Centro Nacional de Metrología (CENAM); MéxicoFil: Loayza, V. M. Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMetro); BrasilFil: Cacais, F. A. Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMetro); BrasilFil: Ramos, O. Laboratorio Costarricense de Metrología (LaCoMet); Costa RicaFil: Rodriguez, S. Laboratorio Costarricense de Metrología (LaCoMet); Costa RicaFil: Garcia, F. Centro de Estudios, Medición y Certificación de Calidad (CESMEC); ChileFil: Leyton, F. Centro de Estudios, Medición y Certificación de Calidad (CESMEC); ChileFil: Santo, C. Laboratorio Tecnológico del Uruguay (LATU); UruguayFil: Caceres, J. Laboratorio Tecnológico del Uruguay (LATU); UruguayFil: Kornblit, F. Instituto Nacional de Tecnología Industrial (INTI); ArgentinaFil: Leiblich, J. Instituto Nacional de Tecnología Industrial (INTI); ArgentinaFil: Claude, J. National Research Council (NRC); Canad
Final report : SIM comparison in mass standards SIM.M.M-K4
This report summarizes the results of a SIM comparison in masss carried out between 7 NMIs. Five mass standards with nominal values 2 kg, 200 g, 50 g, 1 g and 200 mg have been circulated by the NMIs. The results reported by the participants are consistent with each other and with the key comparison reference valu of the comparison CCM.M-K5 to which the present comparison has been linked.Fil: Becerra, L. O. Centro Nacional de Metrología (CENAM); MéxicoFil: Peña, L. M. Centro Nacional de Metrología (CENAM); MéxicoFil: Luján, L. Centro Nacional de Metrología (CENAM); MéxicoFil: Díaz, J. C. Centro Nacional de Metrología (CENAM); MéxicoFil: Centeno, , L. M. Centro Nacional de Metrología (CENAM); MéxicoFil: Loayza, V. M. Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMetro); BrasilFil: Cacais, F. A. Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMetro); BrasilFil: Ramos, O. Laboratorio Costarricense de Metrología (LaCoMet); Costa RicaFil: Rodriguez, S. Laboratorio Costarricense de Metrología (LaCoMet); Costa RicaFil: Garcia, F. Centro de Estudios, Medición y Certificación de Calidad (CESMEC); ChileFil: Leyton, F. Centro de Estudios, Medición y Certificación de Calidad (CESMEC); ChileFil: Santo, C. Laboratorio Tecnológico del Uruguay (LATU); UruguayFil: Caceres, J. Laboratorio Tecnológico del Uruguay (LATU); UruguayFil: Kornblit, F. Instituto Nacional de Tecnología Industrial (INTI); ArgentinaFil: Leiblich, J. Instituto Nacional de Tecnología Industrial (INTI); ArgentinaFil: Claude, J. National Research Council (NRC); Canad
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