Fogo bacteriano das pomáceas.

bitstream/item/40813/1/cir21.pd

Normas técnicas e documentos de acompanhamento da produção Integrada de maçã- 2º versão.

bitstream/item/60750/1/CNPUV-DOC.33-04.pdf2. ed

Methane production from mixed tropical savanna and forest vegetation in Venezuela

International audienceMeasurements of methane concentrations in the boundary layer in the northern part of the Guayana shield, Venezuela, during the wet season (October 1988), showed the presence of substantial methane surface emissions. The measuring site is within the savanna climate region, but is affected by emissions from savanna and forest vegetation. From day versus night concentration measurements, with higher concentrations during night, a methane source strength near the site of 3?7×1011 molecules/cm2/s can be estimated, which includes emissions from small tracts of flooded soils, termites and especially tropical vegetation. Extrapolated to the entire savanna, this may imply a methane source of ~30?60 Tg yr?1 similar to the one calculated for tropical vegetation on the basis of recently published in vitro plant emission experiments by Keppler et al. (2006), which indicate emissions of ~30 Tg yr?1 for tropical savannas and grasslands and ~78 Tg yr?1 for tropical forests

New insights in the global cycle of acetonitrile: release from the ocean and acetonitrile: release from the ocean and Venezuela

International audienceCUsing the proton transfer reaction mass spectrometry (PTR-MS) technique, acetonitrile was measured during the wet season in a Venezuelan woodland savanna. The site was located downwind of the Caribbean Sea and no biomass burning events were observed in the region. High boundary layer concentrations of 211 ±36 pmol/mol (median, ± standard deviation) were observed during daytime in the well mixed boundary layer, which is about 60 pmol/mol above background concentrations recently measured over the Mediterranean Sea and the Pacific Ocean. Most likely acetonitrile is released from the warm waters of the Caribbean Sea thereby enhancing mixing ratios over Venezuela. Acetonitrile concentrations will probably still be much higher in biomass burning plumes, however, the general suitability of acetonitrile as a biomass burning marker should be treated with care. During nights, acetonitrile dropped to levels typically around 120 pmol/mol, which is consistent with a dry deposition velocity of ~0.14 cm/s when a nocturnal boundary layer height of 100 m is assumed

Presence of Appendix Fibrosa Hepatitis: Study of Bioanthropological and Structure Correlation

Indexacion: ScieloRESUMEN: El apéndice fibroso hepático es una estructura anatómica del espacio subfrénico, poco descrita en la literatura universal y de importancia clínica. Se diseñó un protocolo para ser realizado en cadáveres donde se determina su presencia, características y correlación estadística con factores antropométricos. En 24 cadáveres se determina que el apéndice fibroso hepático siempre está presente, y que no existe correlación estadísticamente significativa, pero sí se observa variabilidad entre las dimensiones biométricas analizadas. SUMMARY: The hepatic fibrous appendix is an anatomical structure of the subfrenic space scarcely described in the universal literature and of vital clinical importance. For their study a protocol was designed to be carried out in cadavers where its presence is determined, characteristic and statistical correlation with anthropometric factors. In 24 cadavers it is determined that the hepatic fibrous appendix is always present, and that correlation doesn't exist statistically significant among the analyzed anthropological factors, but it's possible to observe variability in it's dimensions

Source gases: Concentrations, emissions, and trends

Source gases are defined as those gases that influence levels of stratospheric ozone (O3) by transporting species containing halogen, hydrogen, and nitrogen to the stratosphere. Examples are the CFC's, methane (CH4), and nitrous oxide (N2O). Other source gases that also come under consideration in an atmospheric O3 context are those that are involved in the O3 or hydroxyl (OH) radical chemistry of the troposphere. Examples are CH4, carbon monoxide (CO), and nonmethane hydrocarbons (NMHC's). Most of the source gases, along with carbon dioxide (CO2) and water vapor (H2O), are climatically significant and thus affect stratospheric O3 levels by their influence on stratospheric temperatures. Carbonyl sulphide (COS) could affect stratospheric O3 through maintenance of the stratospheric sulphate aerosol layer, which may be involved in heterogeneous chlorine-catalyzed O3 destruction. The previous reviews of trends and emissions of source gases, either from the context of their influence on atmospheric O3 or global climate change, are updated. The current global abundances and concentration trends of the trace gases are given in tabular format

Biometrical Aspects of the Anterior Cerebral Artery in its Proximal Segment (A1) and Internal Carotid Artery

Indexación: ScieloLa conformación del círculo arterial cerebral tiene relevancia en la clínica neuroquirúrgica por la relación compleja que presentan las arterias que lo originan y su gran variabilidad Debido a a esto, hemos decidido efectuar un análisis biométrico de las arterias cerebral anterior (Al) y de la arteria carótida interna (ACI) por posible asociación o correlación en estas estructuras. El trabajo se realizó en 36 cerebros disponibles en los laboratorios y cuyos datos bioantropológicos estaban registrados. El segmento Al de la arteria cerebral anterior derecha tuvo una longitud y calibre promedio de 12,86+1.58mm y 2,37±0,68mm, respectivamente. En el lado izquierdo la longitud y el calibre promedio de esta arteria fue 12,62+1.96mm y de 2,42±0,75mm, respectivamente. El calibre del lado derecho de la ACI fue 3,84±0,68mm y del lado izquierdo fue 3,96±0,87mm. Se observó variabilidad anatómica de los componentes que constituyen el círculo arterial cerebral cuando se considera lado, sexo e índice cefálico. PALABRAS CLAVE: Arteria cerebral anterior; Círculo arterial del cerebro; Arteria carótida interna.SUMMARY: The conformation of the arterial circle of the base of the brain has relevancy in the neurochirurgical clinic as the complex relation that there present the arteries that originate it and its great variability. Due to the high frequency the aneurysms observed in the anterior communicating arteries, besides too, in the precommunicating segment (Al) of the anterior cerebral artery, we have decided to carry out a biometrical analysis of these arteries and the ICA for research possible association or correlation in these arteries.The work was realized in 36 available brains in the anatomical laboratories. These specimens had bioanthropological data. The segment Al of the anterior cerebral artery observed a length of 12,86 ± 1.58 mm and presents a diameter of 2.37 ± 0.68 mm in the right side. In the left side the length of this one segment is 12. 62 ± 1.96 mm and presents a diameter of 2.42 ± 0.75 mm. The external diameter of the ACI in the right side was 3.84±0.68 mm and in left side was 3.96 ± 0.87 mm. It is observed variability of the components that constitute the arterial cerebral circle when it is considered to be the side, the sex and cephalic index. KEY WORDS; Anterior cerebral artery; Cerebral artery circle; Internal carotide artery

Características e controle da podridão "olho de boi" nas maçãs do sul do Brasil.

bitstream/item/55164/1/cir066.pd

Distinct Chemical Regions in the "Prestellar" Infrared Dark Cloud G028.23–00.19

We have observed the Infrared Dark Cloud (IRDC) G028.23–00.19 at 3.3 mm using the Combined Array for Research in Millimeter-wave Astronomy. In its center, the IRDC hosts one of the most massive (~1520 M_☉) quiescent, cold (12 K) clumps known (MM1). The low temperature, high NH2D abundance, narrow molecular line widths, and absence of embedded infrared sources (from 3.6 to 70 μm) indicate that the clump is likely prestellar. Strong SiO emission with broad line widths (6-9 km s^(–1)) and high abundances ((0.8-4) × 10^(–9)) is detected in the northern and southern regions of the IRDC, unassociated with MM1. We suggest that SiO is released to the gas phase from the dust grains through shocks produced by outflows from undetected intermediate-mass stars or clusters of low-mass stars deeply embedded in the IRDC. A weaker SiO component with narrow line widths (~2 km s^(–1)) and low abundances (4.3 × 10^(–11)) is detected in the center-west region, consistent with either a "subcloud-subcloud" collision or an unresolved population of a few low-mass stars. We report widespread CH_3OH emission throughout the whole IRDC and the first detection of extended narrow methanol emission (~2 km s^(–1)) in a cold, massive prestellar clump (MM1). We suggest that the most likely mechanism releasing methanol into the gas phase in such a cold region is the exothermicity of grain-surface reactions. HN^(13)C reveals that the IRDC is actually composed of two distinct substructures ("subclouds") separated in velocity space by ~1.4 km s^(–1). The narrow SiO component arises where the subclouds overlap. The spatial distribution of C2H resembles that of NH_2D, which suggests that C_2H also traces cold gas in this IRDC