Accurate spectroscopy of Sr atoms

We report the frequency measurement with an accuracy in the 100 kHz range of several optical transitions of atomic Sr : $^1S_0- ^3P_1$ at 689 nm, $^3P_1- ^3S_1$ at 688 nm and $^3P_0- ^3S_1$ at 679 nm. Measurements are performed with a frequency chain based on a femtosecond laser referenced to primary frequency standards. They allowed the indirect determination with a 70 kHz uncertainty of the frequency of the doubly forbidden 5s^2^1S_0- 5s5p^3P_0 transition of $^{87}$Sr at 698 nm and in a second step its direct observation. Frequency measurements are performed for $^{88}$Sr and $^{87}$Sr, allowing the determination of $^3P_0$, $^3P_1$ and $^3S_1$ isotope shifts, as well as the $^3S_1$ hyperfine constants.Comment: 12 pages, 16 figure

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FERTILIDADE E ADUBAÇÃO: Características agronômicas e absorção de boro em diferentes genótipos de girassol. Produção de girassol em resposta à utilização de boro e a adubação nitrogenada de cobertura. Produção de girassol em resposta à utilização de fontes e doses de nitrogênio. FISIOLOGIA VEGETAL: Avaliação da qualidade fisiológica de sementes de girassol submetidas a diferentes formas de armazenamento. Matéria seca e área foliar de girassol em diferentes arranjos espaciais de plantas. Efeito da época de semeadura na massa dos grãos de híbridos de girassol na região do recôncavo da Bahia. Fenologia de híbridos de girassol em diferentes épocas de semeadura no recôncavo sul da Bahia. 8. Germinação e vigor de sementes de girassol. Uso de biorregulador vegetal em hibridos de girassol cultivados sobre plantio direto. Crescimento do sistema radicular de plantas de girassol submetidas ao stimulate ®. Métodos para determinar a variação da área foliar em genótipos de girassol. FITOSSANIDADE: Inibição in vitro de Sclerotinia sclerotiorum com uso de extratos de plantas do cerrado. Reação de genótipos de girassol à mancha de alternaria (Alternaria helianthi) em condições de campo, nas safras 2011/2012 e 2012/2013. Reação de genótipos de girassol à podridão branca (Sclerotinia sclerotiorum) em condições de campo, em 2012 e 2013. Progresso de Sclerotinia sclerotiorum no girassol em diferentes espaçamentos de entre linha e controle químico. Sclerotinia sclerotiorum na cultura do girassol em épocas distintas de semeadura associado a diferentes fungicidas. Produtividade de grãos de girassol sobre área com infestação e sem infestação de Sclerotinia sclerotiorum de diferentes cultivares. MANEJO CULTURAL: Correlação de diâmetro de capítulo e produção de aquênios de oito cultivares de girassol. Desenvolvimento de onze cultivares de girassol em São Gonçalo dos Campos ? Bahia. Produção de grão e óleo de girassol no semiárido, semeado fora da época de Zoneamento agroclimático. Produção de grãos e oléo de girassol no semiárido baiano. Relação entre resistência do solo a penetração e o crescimento de planta de girassol sob sistema plantio direto. Características agronômicas de genótipos de girassol. Produtividade de genótipos de girassol. O girassol como opção em sistemas de integração lavoura-pecuária. Crescimento de cultivares de girassol (Helianthus annuus L.). MELHORAMENTO GENÉTICO: Avaliação de genótipos de girassol na safrinha/2012 em Maringá-PR. Comportamento de genótipos de girassol em mato grosso, na safra de 2011. Avaliação do desempenho agronômico de genótipos de girassol no município de Campo Verde - MT, na safra de 2012. Avaliação temporal de genótipos de girassol no cerrado do distrito federal em safrinha. Características agronômicas de genótipos de girassol em Guarapuava-pr. Comportamento de genótipos de girassol em fazenda Rio Grande-PR. Competição de cultivares de girassol no agreste central de Pernambuco. Desempenho agronômico de genótipos de girassol em cultivo de safra, no município de Espírito Santo do Pinhal-SP. Desempenho de genótipos de girassol nos municípios de Teresina, São João do Piauí e Uruçuí, PI:ano agrícola 2011/2012. Avaliação de genótipos de girassol em Paragominas ? PA ? ensaio final de primeiro ano. Avaliação de genótipos de girassol em paragominas ? pa, ensaio final de segundo ano. Desempenho de cultivares de girassol de ensaio final de primeiro ano no nordeste brasileiro: ano 2012. Desempenho de cultivares de girassol de ensaio final de segundo ano no nordeste brasileiro: ano 2012. Óleo e co-produtos40. Efeito ambiental no perfil de ácidos graxos no óleo de girassol. Ingredientes alimentícios de proteína de sementes de girassol. Valores nutricionais de genótipos de girassol. Valores nutricionais de sementes de girassol. OUTRAS ÁREAS: Diagnóstico de publicações científicas sobre girassol disponíveis na biblioteca. SciELO DE 2009 A 2013.Editado por Regina Maria Villas Bôas de Campos Leite, Adilson de Oliveira Junior, Aluísio Brigido Borba Filho. RNPG

Near-threshold production of omega mesons in the pn -> d omega reaction

The first measurement of the p n -> d omega total cross section has been achieved at mean excess energies of Q = 28 and 57 MeV by using a deuterium cluster-jet target. The momentum of the fast deuteron was measured in the ANKE spectrometer at COSY-Juelich and that of the slow "spectator" proton p(sp) from the p d -> p(sp) d omega reaction in a silicon telescope placed close to the target. The cross sections lie above those measured for p p -> p p omega but seem to be below theoretical predictions.Comment: 7 pages, 8 figures; second approach to describe the background has been added; results changed insignificantly, EPJ in pres

Electron Radiated Power in Cyclotron Radiation Emission Spectroscopy Experiments

The recently developed technique of Cyclotron Radiation Emission Spectroscopy (CRES) uses frequency information from the cyclotron motion of an electron in a magnetic bottle to infer its kinetic energy. Here we derive the expected radio frequency signal from an electron in a waveguide CRES apparatus from first principles. We demonstrate that the frequency-domain signal is rich in information about the electron's kinematic parameters, and extract a set of measurables that in a suitably designed system are sufficient for disentangling the electron's kinetic energy from the rest of its kinematic features. This lays the groundwork for high-resolution energy measurements in future CRES experiments, such as the Project 8 neutrino mass measurement.Comment: 15 pages, 10 figure

The copy number variant involving part of the \u3b17 nicotinic receptor gene contains a polymorphic inversion.

The \u3b17 nicotinic acetylcholine receptor gene (CHRNA7) is located at 15q13\u2013q14 in a region that is strongly linked to the P50 sensory gating deficit, an endophenotype of schizophrenia and bipolar disorder. Part of the gene is a copy number variant, due to a duplication of exons 5\u201310 and 3\u2032 sequence in CHRFAM7A, which is present in many but not all humans. Maps of this region show that the two genes are in opposite orientation in the individual mainly represented in the public access human DNA sequence database (Build 36), suggesting that an inversion had occurred since the duplication. We have used fluorescent in situ hybridization to investigate this putative inversion. Analysis of interphase chromosomes in 12 individuals confirms the occurrence of an inversion and indicates that CHRFAM7A exists in both orientations with similar frequency. We showed that the 2\u2009bp deletion polymorphism in exon 6 of CHRFAM7A is in strong linkage disequilibrium with the inversion polymorphism (r2=0.82, CI 0.53\u20131.00, P=0.00003), which can therefore be used as a surrogate marker. Previous associations of endophenotypes of schizophrenia with the 2\u2009bp deletion might therefore be due to the orientation of the duplicon containing CHRFAM7A

Deadwood in forest stands close to old-growthness under Mediterranean conditions in the Italian Peninsula

Considering that indicators of old-growth features can vary across the European ecoregions, this paper provides some results to identify the distinctive traits of old-growth forests in the Mediterranean ecoregion. Deadwood occurrence as indicator of naturalness is investigated in some remote forest areas that have developed in absence of anthropogenic disturbance over the past few decades. Eleven study sites across the Italian peninsula were elected and records of deadwood were carried out in 1-ha size plots. Deadwood volume, deadwood types and decay stages were inventoried in the selected sites. The amounts of deadwood indicate a large variability among the investigated forest stands: the total volume ranged between 2 and 143 m3ha-1, with an average of 60 m3ha-1. Lying deadwood is the most abundant component of deadwood in the investigated forests, due to the natural mortality occurring in the stands in relation to the processes established in the last decades. On the contrary, stumps are the less represented type of deadwood in almost all the study areas. All the decay classes are present in each study site. The amount of deadwood in Southern Europe, even if lower than that reported for North and Central European countries, could have a different meaning due to the faster decay occurring in Mediterranean forest ecosystems. For this reason, old-growth features and the characteristics of each indicator should be framed and referred to well-defined climatic and biogeographic contexts. Distinctively, under the conditions here investigated, three main deadwood features prove to characterize forest stands close to old-growthness: a ratio of dead to living wood not lower than 10%; lying deadwood much more abundant than the standing one; large range of deadwood size and decay classes across all the deadwood components

No Dynamics in the Extremal Kerr Throat

Motivated by the Kerr/CFT conjecture, we explore solutions of vacuum general relativity whose asymptotic behavior agrees with that of the extremal Kerr throat, sometimes called the Near-Horizon Extreme Kerr (NHEK) geometry. We argue that all such solutions are diffeomorphic to the NHEK geometry itself. The logic proceeds in two steps. We first argue that certain charges must vanish at all times for any solution with NHEK asymptotics. We then analyze these charges in detail for linearized solutions. Though one can choose the relevant charges to vanish at any initial time, these charges are not conserved. As a result, requiring the charges to vanish at all times is a much stronger condition. We argue that all solutions satisfying this condition are diffeomorphic to the NHEK metric.Comment: 42 pages, 3 figures. v3: minor clarifications and correction