Atmosfera modificada na conservação pós-colheita de Uva 'Centennial Seedless' .

Técnicas como armazenamento refrigerado e uso de atmosfera modificada em uvas são eficientes contra a degrana e a incidência de podridões, problemas que afetam diretamente a qualidade e a conservação pós-colheita das frutas. A cultivar Centennial Seedless apresenta potencial de consumo como uva fina de mesa devido à ausência de sementes. Objetivou-se nesse trabalho verificar o efeito da aplicação de atmosfera modificada passiva, com a utilização de filmes para embalagem na conservação pós-colheita de uvas cv. Centennial Seedless. Os frutos foram colhidos no estádio de casca verde amarelado, transportados, selecionados e acondicionados em diferentes filmes para embalagem: polietileno de baixa densidade (PEBD - 10 e 20 ?m) e polipropileno (PP - 6 e 10 ?m). Frutos não embalados foram utilizados como controle. Os cachos foram armazenados em câmara fria a 1°C e 85-90% UR durante 80 dias, sendo analisados a cada 20 dias, mais três dias a 22°C simulando-se a comercialização. Foram analisados: índice de abscisão das bagas, índice de podridões, desidratação do engaço e índice de escurecimento do engaço. O delineamento experimental adotado foi o inteiramente ao acaso em fatorial 5 x 4 (5 tratamentos e 4 períodos de armazenamento). Foram utilizadas 4 repetições de 3 cachos por tratamento. Os resultados foram submetidos à análise de variância e as médias foram comparadas pelo teste da diferença mínima significativa (p<0,05). Valores baixos de abscisão de bagas (3%) foram encontrados nos frutos embalados com o filme PP durante o armazenamento. A amostra controle foi a que apresentou maiores índices de podridão em todos os períodos avaliados. A desidratação do engaço foi semelhante nos tratamentos com embalagem nos períodos de comercialização simulada. As embalagens foram eficientes contra o escurecimento do engaço. Os resultados mostraram que o filme polipropileno foi o que melhor conservou a qualidade das uvas cv. Centennial Seedless

Dringliche Eingriffe in der endokrinen Chirurgie

Während Notfalloperationen aus mechanischer Indikation immer wieder vorkommen (z. B. Chiasma-Syndrom, Atemwegsobstruktion), sind die kritischen Überfunktionen der endokrinen Drüsen in der Regel durch konservativ-medikamentöse Therapie ausreichend zu beherrschen. Ausnahmen: z. B. thyreotoxische Krise (bei nur kurz anhaltender Besserung durch Plasmapherese bei einer jodinduzierten Hyperthyreose) oder akutes Cushing-Syndrom (nicht beherrschbare hypokaliämische Alkalose). Solche Einzelfälle hängen von der optimalen Kooperation von Anaesthesie, Chirurgie und internistischer Intensivmedizin ab. Gesetze der Diagnose und der konservativen Vorbereitung für die operative Behandlung von endokrinen Überfunktionszuständen nur ultima ratio übertreten!Urgent surgery for emergency situations in endocrine diseases is needed for mechanical problems (e.g., chiasma syndrome or tracheal obstruction) and very rarely for endocrine hyperfunction, which can usually be treated by nonsurgical means. Exceptions are patients suffering from thyroid storm (impending early relapse after plasmapheresis due to excess iodine) or from acute Cushing's syndrome (intractable potassium loss and alkalosis whom we have successfully transferred to surgery. The rules for diagnosis and medical preparation for surgery of endocrine hyperfunctional states should only be disregarded ultima ratio

Reconstitution of 3′ end processing of mammalian pre-mRNA reveals a central role of RBBP6

The 3′ ends of almost all eukaryotic mRNAs are generated in an essential two-step processing reaction: endonucleolytic cleavage of an extended precursor followed by the addition of a poly(A) tail. By reconstituting the reaction from overproduced and purified proteins, we provide a minimal list of 14 polypeptides that are essential and two that are stimulatory for RNA processing. In a reaction depending on the polyadenylation signal AAUAAA, the reconstituted system cleaves pre-mRNA at a single preferred site corresponding to the one used in vivo. Among the proteins, cleavage factor I stimulates cleavage but is not essential, consistent with its prominent role in alternative polyadenylation. RBBP6 is required, with structural data showing it to contact and presumably activate the endonuclease CPSF73 through its DWNN domain. The C-terminal domain of RNA polymerase II is dispensable. ATP, but not its hydrolysis, supports RNA cleavage by binding to the hClp1 subunit of cleavage factor II with submicromolar affinity

Generating reversible circuits from higher-order functional programs

Boolean reversible circuits are boolean circuits made of reversible elementary gates. Despite their constrained form, they can simulate any boolean function. The synthesis and validation of a reversible circuit simulating a given function is a difficult problem. In 1973, Bennett proposed to generate reversible circuits from traces of execution of Turing machines. In this paper, we propose a novel presentation of this approach, adapted to higher-order programs. Starting with a PCF-like language, we use a monadic representation of the trace of execution to turn a regular boolean program into a circuit-generating code. We show that a circuit traced out of a program computes the same boolean function as the original program. This technique has been successfully applied to generate large oracles with the quantum programming language Quipper.Comment: 21 pages. A shorter preprint has been accepted for publication in the Proceedings of Reversible Computation 2016. The final publication is available at http://link.springer.co

Search for the Hypothetical pi -> mu x Decay

The KARMEN collaboration has reported the possible observation of a hitherto unknown neutral and weakly interacting particle x, which is produced in the decay pi -> mu + x with a mass m(x) = 33.9 MeV. We have searched for this hypothetical decay branch by studying muons from pion decay in flight with the LEPS spectrometer at the piE3 channel at PSI and find branching ratios BR(pi- to mu- anti-x) < 4e-7 and BR(pi+ to mu+ x) < 7e-8 (95\% C.L.). Together with the limit BR > 2e-8 derived in a recent theoretical paper our result would leave only a narrow region for the existence of x if it is a heavy neutrino.Comment: 10 pages, TeX (uses epsf), 3 Postscript figures uu-encode

Study of the process e+e- -> omega pi0 in the phi-meson mass region with the KLOE detector

We have studied the e+e- -> omegapi0 cross section in the sqrt(s) interval 1000-1030 MeV using the pi+pi-pi0pi0 and pi0pi0gamma final states with a sample of ~600 pb^-1 collected with the KLOE detector at DAFNE. By fitting the observed interference pattern around M_phi for both final states, we extract the ratio of the decay widths Gamma(omega->pi0gamma)/Gamma(omega->pi+pi-pi0) = 0.0897 +- 0.0016 and derive the branching fractions BR(omega -> pi+pi-pi0)= (90.24 +- 0.19)%, BR(omega -> pi0gamma) = (8.09 +- 0.14)%. The parameters describing the e+e- -> omegapi0 reaction around M_\phi are also used to extract the branching fraction for the OZI and G-parity violating phi -> omegapi0 decay: BR(phi->omegapi0) = (4.4 +- 0.6)x10^-5.Comment: 12 Pages, 4 figures, submitted to Physics Letter