Uso de escórias de siderugia na agricultura.

bitstream/item/40774/1/Uso-de-escorias-oscar.pdfSIDE 009/11A - Rural Centro 29 abr. 2011; SIDE 009/11B - Folha do Fazendeiro maio 2011; SIDE 009/11C - Portal Dia de Campo 29 ago. 2011; SIDE 009/11D - Território Rural abr. 2011; SIDE 009/11E - Portal do Agronegócio 28 abr. 2011; SIDE 009/11F - Agronline 28 abr. 2011; SIDE 009/11G - Campo Grande News 13 jul 2011; SIDE 009/11H - Portal dia de Campo 13 jul 2011; SIDE 009/11I - Dourados Informa 28 abr. 2011

A prominent relativistic iron line in the Seyfert 1 MCG-02-14-009

I report the discovery of a prominent broad and asymmetrical feature near 6.4 keV in the Seyfert 1 MCG-02-14-009 (z=0.028) with XMM-Newton/EPIC. The present short X-ray observation (PN net exposure time ~5 ks) is the first one above 2 keV for MCG-02-14-009. The feature can be explained by either a relativistic iron line around either a Schwarzschild (non-rotating) or a Kerr (rotating) black hole. If the feature is a relativistic iron line around a Schwarzschild black hole, the line energy is 6.51 (+0.21,-0.12) keV with an equivalent width of 631 (+259,-243) eV and that the inclination angle of the accretion disc should be less than 43 degrees. A relativistically blurred photoionized disc model gives a very good spectral fit over the broad band 0.2-12keV energy range. The spectrum is reflection dominated and this would indicate that the primary source in MCG-02-14-009 is located very close to the black hole, where gravitational light bending effect is important (about 3-4 Rg), and that the black hole may rapidly rotate.Comment: Accepted for publication, A&A Letters, 5 pages, 3 figures, and 1 tabl

Dating climatic change in hot deserts using desert varnish on meteorite finds

A thin coating of desert varnish occurs on Forrest 009 and Nurina 004, both equilibrated ordinary chondrite (L6) finds from the Nullarbor Plain, Australia. This finely laminated deposit is chemically and petrographically comparable to the varnish found on terrestrial rocks. Forrest 009, which has a terrestrial age of 5.9 kyr, has a 100-130 micrometre thick coating of desert varnish that has a laterally consistent chemical microstratigraphy comprising a narrow Ba- and Mn-poor lower region, a thick Ba- and Mn-rich central area and a narrow outer zone almost devoid of both cations. The interior of the meteorite contains Fe-oxide and oxyhydroxide veins that have formed by chemical weathering of metals and sulphides. As these veins do not cross-cut the varnish, it must have accreted rapidly relative to the weathering rate of the meteorite. The less than or equal to 70 mum thick varnish on Nurina 004, which has a terrestrial age of 33.4 kyr, lacks a consistent chemical microstratigraphy, but it is cross-cut by Fe-oxide and oxyhydroxide veins, some of which have supplied Fe to the varnish. This implies that the chemical weathering rate of Nurina 004's interior was slow in comparison to the accretion rate of the varnish. The petrography and chemical composition of varnish on Forrest 009 indicates that this meteorite may have resided in a relatively humid environment for most of its 5.9 kyr terrestrial history and that the Nullarbor recently became more arid. This conclusion supports results from an analysis of Fe-bearing weathering products in the interior of the meteorite by Mossbauer spectroscopy, which also indicate that Forrest 009 experienced an early period of rapid weathering under relatively humid conditions. The petrography of varnish on Nurina 004 shows that the interior of the meteorite weathered relatively slowly, probably because it fell during an and time, which is again in agreement with previous Mossbauer spectroscopy results. Results from both meteorites are in agreement with palaeoclimate data derived from a number of other proxies. The implications of this work are that the large number of meteorites that have been collected from several hot deserts of the world may be a powerful source of information on climate change over the last 30-35 kyr

MS-009: Ambrose Henry Hayward Papers

The Ambrose Henry Hayward Collection consists primarily of correspondence from the period April 14, 1861 through August 17, 1864. The bulk of the letters were written by A.H. Hayward to his father, sister and brothers, but the collection includes 3 letters written by Melville Hayward of the 7th New York (6/22/1862, 7/10/1862, 7/23/1862), letters from Henry\u27s commanding officers regarding his service and four letters regarding Henry\u27s death. Also included in the collection are several newspaper clippings about the 28th Pennsylvania, Hayward\u27s 1862 promotion to Sergeant, and 19 envelopes addressed to Mr. Ambrose, Mr. Albert, Mr. John and Miss Hannah C. Hayward of North Bridgewater, MA and to Mr. Augustus Hayward of New York City. All letters have transcriptions, though many are slightly inaccurate. The collection is arranged chronologically. The letters provide firsthand accounts of camp life, major battles and minor skirmishes during the Civil War as experienced by a high-spirited and patriotic Union soldier. Special Collections and College Archives Finding Aids are discovery tools used to describe and provide access to our holdings. Finding aids include historical and biographical information about each collection in addition to inventories of their content. More information about our collections can be found on our website http://www.gettysburg.edu/special_collections/collections/.https://cupola.gettysburg.edu/findingaidsall/1008/thumbnail.jp

Spectra in Conformal Field Theories from the Rogers Dilogarithm

We propose a system of functional relations having a universal form connected to the $U_q(X^{(1)}_r)$ Bethe ansatz equation. Based on the analysis of it, we conjecture a new sum formula for the Rogers dilogarithm function in terms of the scaling dimensions of the $X^{(1)}_r$ parafermion conformal field theory.Comment: 10 pages, MRR-009-92, SMS-042-9