303 research outputs found

    Produção de alface em função da época de cultivo em Macapá-AP.

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    O objetivo deste trabalho foi determinar o efeito da época de cultivo (época seca e época chuvosa) na produção de alface avaliando-se os seguintes parametros: número de folhas, peso da cabeça e produtividade.bitstream/item/97855/1/CPAF-AP-1998-Producao-alface.pd

    Kongeriget Danmark i 1332 - et fallitbo

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    Denmark 1332 - A Bankrupt RealmIn the history of Denmark the years 1332-1340 were an interregnum. After Christopher II died in 1332 there was no King of Denmark until 1340, when his son Valdemar Atterdag acceded to the throne. At Christopher’s death the entire Danish realm had been mortgaged to domestic and foreign creditors, and he had no realistic chance of paying them off. To all appearances the realm would be dissolved, and its various parts would be incorporated in neighbouring kingdoms and principalities. That is not what happened. Valdemar IV succeeded in reuniting the realm, but it took him more than twenty years to do it.Pawning parts of the Danish realm was a frequent occurrence in the High and Late Middle Ages, but the situation in the 1330s was unique. Never before or after did the phenomenon reach a point that threatened the very existence of the realm, and Danish historians, who have ever since felt it as a national humiliation, have proffered a series of explanations to account for how it came about.The earliest explanations from the middle of the fourteenth up to the eighteenth century strongly emphasize Christopher’s personal responsibility: weak character and a sinful life plunged the realm into disaster. In the first half of the eighteenth century the blame was extended to a broader circle, and it was recognized that in Count Gerhard III of Holstein, the king faced as his most bitter opponent an adversary who far outmatched him in political wits. In the middle of the nineteenth century the source of the problem is placed further back in time to Christopher’s brother and predecessor, King Eric VI Menved, whose costly wars had thrown the country into debt.Another explanation, which with various modifications is still considered valid today, arose around the beginning of the twentieth century. It contends that Eric VI’s and Christopher II’s severe taxation of the Danish yeomanry undermined itself by driving the freehold peasants to seek the protection of the nobility: In ceding their property rights in return for tenure their land was safeguarded under the nobility’s exemption from royal taxes. The drop in tax revenues thus resulted in a collapse of the king’s finances, leading to the disastrous pawning policy and ultimately to the breakdown of royal power.Very few Danish historians have deviated from this explanatory framework, although it has been suggested that the background for mortgaging the realm was more political than financial, i.e., rather than an attempt to raise liquid assets it should be seen primarily a means to procure political support from persons for whom landed property meant more than money.The present study argues that there is no documentation for a royal financial crisis. Even if ordinary taxes were in decline, this was offset by the collection of extraordinary taxes. Moreover, the Danish kings’ credit was good, and their ability to contract loans far from exhausted. The collapse cannot be attributed to a state-finance crisis; it must have been due to a political crisis. The pawning away of the realm must be seen as a political instrument, not as a desperate attempt to raise money to rescue a bankrupt monarchy. In seeking an explanation of the hopeless situation of the realm just before and during the interregnum the focus thus returns to the personal character traits of the kings as politicians and the politics of the times.Translated by Michael Wolf

    Three-body correlations in Borromean halo nuclei

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    Three-body correlations in the dissociation of two-neutron halo nuclei are explored using a technique based on intensity interferometry and Dalitz plots. This provides for the combined treatment of both the n-n and core-n interactions in the exit channel. As an example, the breakup of 14Be into 12Be+n+n by Pb and C targets has been analysed and the halo n-n separation extracted. A finite delay between the emission of the neutrons in the reaction on the C target was observed and is attributed to 13Be resonances populated in sequential breakup.Comment: 5 pages, 4 figures, submitted to PR

    The detection of neutron clusters

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    A new approach to the production and detection of bound neutron clusters is presented. The technique is based on the breakup of beams of very neutron-rich nuclei and the subsequent detection of the recoiling proton in a liquid scintillator. The method has been tested in the breakup of 11Li, 14Be and 15B beams by a C target. Some 6 events were observed that exhibit the characteristics of a multineutron cluster liberated in the breakup of 14Be, most probably in the channel 10Be+4n. The various backgrounds that may mimic such a signal are discussed in detail.Comment: 11 pages, 12 figures, LPCC 01-1

    Custos de produção de culturas anuais consorciadas ou não com capim-massai para produção de silagem em sistema de sequeiro.

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    Resumo: O Semiárido brasileiro caracteriza-se por apresentar um período seco longo e que ocorre redução na capacidade de suporte do pasto, devido à baixa disponibilidade e qualidade da forragem. Surge, portanto a necessidade de produção de volumosos mais produtivos e eficientes no uso da terra visando sua conservação na forma de silagem para o uso no período seco. Objetivou-se avaliar os custos de produção da silagem de milho, sorgo e milheto consorciados ou não com o capim-massai em sequeiro e simulada a quantidade de ovinos possíveis de serem alimentados em área formada em 1,0 ha com o material ensilado de cada cultura durante o período seco do ano.Edición de las Memorias de la 25a. Reunión de la Asociación Latinoamericana de Producción Animal (ALPA), 2016, Recife, Brasil

    To other planets with upgraded millennial kombucha in rhythms of sustainability and health support

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    Humankind has entered a new era of space exploration: settlements on other planetary bodies are foreseen in the near future. Advanced technologies are being developed to support the adaptation to extraterrestrial environments and, with a view on the longer term, to support the viability of an independent economy. Biological processes will likely play a key role and lead to the production of life-support consumables, and other commodities, in a way that is cheaper and more sustainable than exclusively abiotic processes. Microbial communities could be used to sustain the crews’ health as well as for the production of consumables, for waste recycling, and for biomining. They can self-renew with little resources from Earth, be highly productive on a per-volume basis, and be highly versatile—all of which will be critical in planetary outposts. Well-de!ned, semi-open, and stress-resistant microecosystems are particularly promising. An instance of it is kombucha, known worldwide as a microbial association that produces an eponymous, widespread soft drink that could be valuable for sustaining crews’ health or as a synbiotic (i.e., probiotic and prebiotic) after a rational assemblage of de!ned probiotic bacteria and yeasts with endemic or engineered cellulose producers. Bacterial cellulose products offer a wide spectrum of possible functions, from leather-like to innovative smart materials during long-term missions and future activities in extraterrestrial settlements. Cellulose production by kombucha is zero-waste and could be linked to bioregenerative life support system (BLSS) loops. Another advantage of kombucha lies in its ability to mobilize inorganic ions from rocks, which may help feed BLSS from local resources. Besides outlining those applications and others, we discuss needs for knowledge and other obstacles, among which is the biosafety of microbial producers
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