17 research outputs found

    The European Large Area ISO Survey IX: the 90 micron luminosity function from the Final Analysis sample

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    We present the 90 micron luminosity function of the Final Analysis of the European Large Area ISO Survey (ELAIS), extending the sample size of our previous analysis (paper IV) by about a factor of 4. Our sample extends to z=1.1, around 50 times the comoving volume of paper IV, and 10^{7.7} < h^{-2}L/Lsun < 10^{12.5}. From our optical spectroscopy campaigns of the northern ELAIS 90 mircon survey (7.4 deg^2 in total, to S(90um)>70mJy), we obtained redshifts for 61% of the sample (151 redshifts) to B<21 identified at 7 microns, 15 microns, 20cm or with bright (B<18.5) optical identifications. The selection function is well-defined, permitting the construction of the 90 micron luminosity function of the Final Analysis catalogue in the ELAIS northern fields, which is in excellent agreement with our Preliminary Analysis luminosity function in the ELAIS S1 field from paper IV. The luminosity function is also in good agreement with the IRAS-based prediction of Serjeant & Harrison (2004), which if correct requires luminosity evolution of (1+z)^{3.4 +/- 1.0} for consistency with the source counts. This implies an evolution in comoving volume averaged star formation rate at z<~1 consistent with that derived from rest-frame optical and ultraviolet surveys.Comment: MNRAS accepted. 7 pages, 5 figures. Uses BoxedEPS (included

    The Synoptic All-Sky Infrared (SASIR) Survey

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    We are proposing to conduct a multicolor, synoptic infrared (IR) imaging survey of the Northern sky with a new, dedicated 6.5-meter telescope at San Pedro M\'artir (SPM) Observatory. This initiative is being developed in partnership with astronomy institutions in Mexico and the University of California. The 4-year, dedicated survey, planned to begin in 2017, will reach more than 100 times deeper than 2MASS. The Synoptic All-Sky Infrared (SASIR) Survey will reveal the missing sample of faint red dwarf stars in the local solar neighborhood, and the unprecedented sensitivity over such a wide field will result in the discovery of thousands of z ~ 7 quasars (and reaching to z > 10), allowing detailed study (in concert with JWST and Giant Segmented Mirror Telescopes) of the timing and the origin(s) of reionization. As a time-domain survey, SASIR will reveal the dynamic infrared universe, opening new phase space for discovery. Synoptic observations of over 10^6 supernovae and variable stars will provide better distance measures than optical studies alone. SASIR also provides significant synergy with other major Astro2010 facilities, improving the overall scientific return of community investments. Compared to optical-only measurements, IR colors vastly improve photometric redshifts to z ~ 4, enhancing dark energy and dark matter surveys based on weak lensing and baryon oscillations. The wide field and ToO capabilities will enable a connection of the gravitational wave and neutrino universe - with events otherwise poorly localized on the sky - to transient electromagnetic phenomena.Comment: Revised version of submitted whitepaper to the "Optical and IR Astronomy from the Ground" Program Prioritization Panel of the Astro2010 Decadal Survey; 23 page

    Micropropagación de plantas de lechosa en recipientes de inmersión temporal a partir de brotes axilares

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    We standardized initiation, multiplication, rooting and acclimatization conditions of papaya cv Maradol hermaphrodite plants from axillary buds produced in temporary immersion reactor RITA®. Recipients contained 200 ml of Fitch liquid culture medium, and four shoots of 2 to 3 cm. in length were placed in each. The bioreactors were connected to three different immersion lines of 5, 2, and 1 min each 4h, with 6 containers per line on average, in 16 h photoperiod. After 30 to 45 days, the shoots produced were quantified and classified according to size: 3 cm with or without roots (large). The first two types of shoots were multiplied in the same culture media, and more elongated shoots were acclimatized using Autotrophic Hydroponic System (AHS). The sanity and fidelity of the produced plants were determined using ELISA and RAPD, respectively. For a period of six months 47 vessels were recycled and 1,091 shoots were produced: 377 small; 482 medium; 175 large without roots and 57 rooted shoots. Using AHS, 89.5% acclimatized plants were obtained when rooted shoots were used, and 41.6% from rootless shoots. With the combination of RITA and AHS techniques we achieved a continuous and efficient production of healthy and true to type papaya plants, in comparison to conventional micropropagation and acclimatization procedures.Se estandarizaron las condiciones de iniciación, multiplicación, enraizamiento y aclimatización de plantas hermafroditas de lechosa cv Maradol provenientes de brotes axilares, producidos en recipientes de inmersión temporal RITA®. En cada envase, contentivo de 200 ml de medio de cultivo líquido de Fitch, se colocaron cuatro brotes de 2 a 3 cm de longitud. Los biorreactores se conectaron a tres líneas de inmersión de 5, 2 y 1 min cada 4h y se colocaron 6 envases en promedio por línea, en condiciones de fotoperíodo de 16 h. Transcurridos 30 a 45 días, se cuantificaron los brotes y se clasificaron de acuerdo al tamaño: 3 cm con y sin raíz (grandes). Los dos primeros tipos de brotes se continuaron multiplicando en los mismos medios; y los más elongados se aclimatizaron utilizando el Sistema Autotrófico Hidropónico (SAH). Se determinó la sanidad y la fidelidad de las plantas producidas mediante pruebas de ELISA y RAPD, respectivamente. Durante un periodo de 6 meses se reciclaron un total de 47 recipientes, los cuales produjeron 1.091 brotes: 377 pequeños; 482 medianos; 175 grandes sin raíz y 57 con raíz. Usando el SAH se obtuvo 89,5% de plantas aclimatizadas cuando se usaron brotes enraizados, y 41,6% a partir de brotes sin raíces. Con la combinación de las técnicas RITA y SAH se logró un sistema continuo y eficiente de producción de plantas sanas y fieles al tipo, en comparación con los métodos convencionales de micropropagación y aclimatización

    Prevalencia de síndrome metabólico y grado de concordancia entre 2 clasificaciones diagnosticas en la población adulta de Ciudad Bolívar, Venezuela

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    El S&iacute;ndrome Metab&oacute;lico (SM) se considera determinanteen la epidemia de diabetes y enfermedades cardiovasculares.El objetivo del presente estudio fue describir elcomportamiento epidemiol&oacute;gico del SM y grado de concordanciausando los criterios de ATP-III e IDF/AHA/NHLBI-2009 en la poblaci&oacute;n urbana de Ciudad Bol&iacute;var.Estudio descriptivo, transversal realizado en Ciudad Bol&iacute;var.Se seleccion&oacute; una muestra de 627 individuos &ge; 18a&ntilde;os de edad. Se diagnostic&oacute; SM en base a dos criterios:a) IDF/AHA/NHLBI-2009 y b) ATP-III.En el presente estudio se encontr&oacute;, una prevalencia deSM del 61,6% usando IDF/AHA/NHLBI-2009 y 57,7%al aplicar ATP-III, con un alto grado de concordancia entrelos criterios (p&lt;0,0001). Se evidenci&oacute; un aumento dela prevalencia de SM en sujetos &ge;50 a&ntilde;os. El par&aacute;metrom&aacute;s frecuente fue HDL-C Bajas (84,5%) para ambos criteriosseguido de obesidad abdominal con 81,5% (IDF/AHA/NHLBI-2009) y 67,6% (ATP-III).En Ciudad Bol&iacute;var se encontr&oacute; una alta prevalencia de SMal compararla con otras poblaciones urbanas del pa&iacute;s yAm&eacute;rica Latina. El alto nivel de concordancia entre las clasificacionesdemuestra que m&aacute;s all&aacute; del criterio usado, laimportancia radica en identificar a los sujetos enfermos,para ofrecer un manejo terap&eacute;utico oportuno.Palabras clave: s&iacute;ndrome metab&oacute;lico, prevalencia, factoresde riesgo, concordancia, Ciudad Bol&iacute;var-Venezuela,ATP-III e IDF/AHA/NHLBI-2009The metabolic syndrome (MS) is considered decisive inthe epidemic of diabetes and cardiovascular disease. Theaim of this study was to describe the epidemiological behaviorof MS and degree of agreement using the criteriaof ATP III and IDF / AHA / NHLBI 2009 the urban populationof Ciudad Bolivar.Descriptive, cross-sectional study in Ciudad Bolivar, asample of 627 individuals &ge; 18 years old was selected.Metabolic syndrome was diagnosed based on two criteria:a) IDF / AHA / NHLBI - 2009 and b) ATP - III.In the present study we found a prevalence of 61.6 % SMusing IDF / AHA / NHLBI - 2009 and 57.7 % in applyingATP - III , with a high degree of concordance between thecriteria ( p &lt; 0.0001 ) an increase in the prevalence of MSin patients &ge;50 years was evident . The most commonparameter was Low HDL -C (84.5 %) for both criteria followedby abdominal obesity with 81.5 % (IDF / AHA /NHLBI - 2009) and 67.6 % (ATP -III).In Ciudad Bolivar high prevalence of MS was found whencompared to other urban populations in the country andLatin America. The high level of agreement between rankingsshows that beyond the criteria used, the importancelies in identifying subjects patients to provide timely therapeuticmanagement

    Prevalencia de síndrome metabólico y grado de concordancia entre 2 clasificaciones diagnosticas en la población adulta de Ciudad Bolívar, Venezuela

    No full text
    El S&iacute;ndrome Metab&oacute;lico (SM) se considera determinanteen la epidemia de diabetes y enfermedades cardiovasculares.El objetivo del presente estudio fue describir elcomportamiento epidemiol&oacute;gico del SM y grado de concordanciausando los criterios de ATP-III e IDF/AHA/NHLBI-2009 en la poblaci&oacute;n urbana de Ciudad Bol&iacute;var.Estudio descriptivo, transversal realizado en Ciudad Bol&iacute;var.Se seleccion&oacute; una muestra de 627 individuos &ge; 18a&ntilde;os de edad. Se diagnostic&oacute; SM en base a dos criterios:a) IDF/AHA/NHLBI-2009 y b) ATP-III.En el presente estudio se encontr&oacute;, una prevalencia deSM del 61,6% usando IDF/AHA/NHLBI-2009 y 57,7%al aplicar ATP-III, con un alto grado de concordancia entrelos criterios (p&lt;0,0001). Se evidenci&oacute; un aumento dela prevalencia de SM en sujetos &ge;50 a&ntilde;os. El par&aacute;metrom&aacute;s frecuente fue HDL-C Bajas (84,5%) para ambos criteriosseguido de obesidad abdominal con 81,5% (IDF/AHA/NHLBI-2009) y 67,6% (ATP-III).En Ciudad Bol&iacute;var se encontr&oacute; una alta prevalencia de SMal compararla con otras poblaciones urbanas del pa&iacute;s yAm&eacute;rica Latina. El alto nivel de concordancia entre las clasificacionesdemuestra que m&aacute;s all&aacute; del criterio usado, laimportancia radica en identificar a los sujetos enfermos,para ofrecer un manejo terap&eacute;utico oportuno
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