Manejo de desechos solidos. Casos del sector floricultor

Realizar un estudio práctico del manejo de desechos sólidos en sector floricultor bajo la óptica del desarrollo sostenible teniendo en cuenta los factores administrativos, sociales económicos políticos y ambientales con miras a establecer parámetros

Effect of optical aberrations on the colour appearance of small lights

Purpose: Small red lights (one minute of arc or less) change colour appearance with positive defocus. We investigated the influence of longitudinal chromatic aberration and monochromatic aberrations on the colour appearance of small narrow band lights. Methods: Seven cyclopleged, trichromatic observers viewed a small light (one minute of arc, λmax = 510, 532, 550, 589, 620, 628 nm, approximately 19 per cent Weber contrast) centred within a black annulus (4.5 minutes of arc) and surrounded by a uniform white field (2,170 cd/m2). Pupil size was four millimetres. An optical trombone varied focus. Longitudinal chromatic aberration was controlled with a two component Powell achromatising lens that neutralises the eye’s chromatic aberration; a doublet that doubles and a triplet that reverses the eye’s chromatic aberration. Astigmatism and higher order monochromatic aberrations were corrected using adaptive optics. Results: Observers reported a change in appearance of the small red light (628 nm) without the Powell lens at +0.49 ± 0.21 D defocus and with the doublet at +0.62 ± 0.16 D. Appearance did not alter with the Powell lens, and five of seven observers reported the phenomenon with the triplet for negative defocus (-0.80 ± 0.47 D). Correction of aberrations did not significantly affect the magnitude at which the appearance of the red light changed (+0.44 ± 0.18 D without correction; +0.46 ± 0.16 D with correction). The change in colour appearance with defocus extended to other wavelengths (λmax = 510 to 620 nm), with directions of effects being reversed for short wavelengths relative to long wavelengths. Conclusions: Longitudinal chromatic aberrations but not monochromatic aberrations are involved in changing the appearance of small lights with defocus.

Chemical synthesis and structure elucidation of bovine K-casein (1-44)

The caseins (αs1, αs2, β, and κ) are phosphoproteins present in bovine milk that have been studied for over a century and whose structures remain obscure. Here we describe the chemical synthesis and structure elucidation of the N-terminal segment (1–44) of bovine κ-casein, the protein which maintains the micellar structure of the caseins. κ-Casein (1–44) was synthesised by highly optimised Boc solid-phase peptide chemistry and characterised by mass spectrometry. Structure elucidation was carried out by circular dichroism and nuclear magnetic resonance spectroscopy. CD analysis demonstrated that the segment was ill defined in aqueous medium but in 30% trifluoroethanol it exhibited considerable helical structure. Further, NMR analysis showed the presence of a helical segment containing 26 residues which extends from Pro8 to Arg34. This is the first report which demonstrates extensive secondary structure within the casein class of proteins.

Clinical signs and duration of cyanide toxicosis delivered by the M-44 ejector in wild dogs

Sodium cyanide poison is potentially a more humane method to control wild dogs than sodium fluoroacetate (1080) poison. This study quantified the clinical signs and duration of cyanide toxicosis delivered by the M-44 ejector. The device delivered a nominal 0.88 g of sodium cyanide, which caused the animal to loose the menace reflex in a mean of 43 s, and the animal was assumed to have undergone cerebral hypoxia after the last visible breath. The mean time to cerebral hypoxia was 156 s for a vertical pull and 434 s for a side pull. The difference was possibly because some cyanide may be lost in a side pull. There were three distinct phases of cyanide toxicosis: the initial phase was characterised by head shaking, panting and salivation; the immobilisation phase by incontinence, ataxia and loss of the righting reflex; and the cerebral hypoxia phase by a tetanic seizure. Clinical signs that were exhibited in more than one phase of cyanide toxicosis included retching, agonal breathing, vocalisation, vomiting, altered levels of ocular reflex, leg paddling, tonic muscular spasms, respiratory distress and muscle fasciculations of the muzzle.

Ultrasonic Lamb wave based monitoring of corrosion type of damage in plate using a circular array of piezoelectric transducers

In this paper we propose a concept and report experimental results based on a circular array of Piezoelectric Wafer Active Sensors (PWASs) for rapid localization and parametric identification of corrosion type damage in metallic plates. Implementation of this circular array of PWASs combines the use of ultrasonic Lamb wave propagation technique and an algorithm based on symmetry breaking in the signal pattern to locate and monitor the growth of a corrosion pit on a metallic plate. Wavelet time-frequency maps of the sensor signals are employed to obtain an insight regarding the effect of corrosion growth on the Lamb wave transmission in time-frequency scale. We present here a method to eliminate the time scale, which helps in identifying easily the signature of damage in the measured signals. The proposed method becomes useful in determining the approximate location of the damage with respect to the location of three neighboring sensors in the circular array. A cumulative damage index is computed from the wavelet coefficients for varying damage sizes and the results appear promising. Damage index is plotted against the damage parameters for frequency sweep of the excitation signal (a windowed sine signal). Results of corrosion damage are compared with circular holes of various sizes to demonstrate the applicability of present method to different types of damage. (C) 2011 Elsevier Ltd. All rights reserved.

Low temperature magnetoresistance and magnetization studies of iron encapsulated multiwall carbon nanotube/polyvinyl chloride composites

We present the experimental results of temperature dependent magnetoresistance (MR) and the magnetization studies of iron encapsulated multiwall carbon nanotube (MWCNT)/polyvinyl chloride (PVC) composites with different wt% of MWCNTs. Transmission electron microscopy characterization shows that MWCNTs are encapsulated with rod-shaped iron nanoparticles of aspect ratio of similar to 3. The MR behavior of 1.9 wt% MWCNT/PVC sample shows dominance of forward scattering and wave function shrinkage whereas, weak localization and electron-electron interactions explain the MR data of higher wt% samples (9.1, 16.6 and 44.4 wt%). The composites of 4.7 and 9.1 wt% exhibit ferromagnetic behavior at all temperatures with room temperature coercivities of similar to 1036 and 628 Oe, respectively. (C) 2014 Elsevier Ltd. All rights reserved.

Prudentia Iuris, 1997, n° 44 (número completo)

Contenido: Semblanza del Doctor Jorge Joaquín Llambías / Guillermo A. Borda – El derecho a la identidad personal / José Luis Mozos – La mediación / Susana I. Cures – Bioética / Rubén Oscar Revello – La hipoteca cambiaria y de títulos-valores / Joaquín Rams Albesa – El Derecho Internacional Privado en las relaciones Mercosur-Unión Europea Nafta / Siegbert Rippe – La Convención Universal sobre derechos de los niños y adolescentes en la Constitución Nacional Argentina / Nora D’Alessandro Halty – Los acreedores en el proceso sucesorio / Claudia Schmidt Hott – Autonomía de la voluntad : problemática actual / María Cármen Gómez Laplaza – Actuación dañosa de los grupos / Ricardo de Ángel Yagüez – La legítima en el Derecho Romano / Alfredo Di Pietro

Letras, 2001, nº 44 (número completo)

Contenido: Letras cumple veinte años -- A, El cuento rioplatense del periodo neoclásico (1700-1830) / Pedro Luis Barcia -- Luces y sombras en la música española del siglo XVIII / Juan Pablo Bardin – Un secreto a voces: Borges-Rimbaud / Marta Vanbiesem de Burbridge -- José Cardiel, Gonzalo de Doblas. Percepciones de América y heterogeneidad en el siglo XVIII / Roxana Gardes de Fernández – La segunda vida de Anita Ozores / Verónica Zumárraga -- El binarismo simétrico como operador del humor en II servitore di due padroni de Carlo Goldoni / Daniel Capano – La casa de Bulemann de Theodor Storm: estrategias narrativas para una intriga de la degradación / Adriana C. Cid – Conradino de Suabia en un poema de Aleardi / Dolores de Durañona y Vedia – Imágenes, concepción y escritura del cuerpo en la obra de Balzac / Ana María Llurba – Reseñas bibliográficas

Influencia de labranza y control de malezas sobre la cenosis, crecimiento, desarrollo y rendimiento del sorgo (Sorghum bicolor L. Moench) var. D-44

De Abril a Julio de 1989 se realizó un ensayo bifactorial en Hacienda Las Mercedes con el objetivo de determinar la influencia de diferentes métodos de labranza y tres métodos de control de malezas sobre el comportamiento de la cenosis, crecimiento, desarrollo y rendimiento del sorgo, encontrándose que en labraba mínima el número de individuaos por m2 fue mayor en relación a la labranza convencional: esta diferencia no solo se manifiesta en abundancia sino también en la dominancia de las maleas. El tratamiento Atraznia en Pre- emergencia ejerció un buen control durante todo el ciclo de las malezas, sin embargo no controló Ciperus rotundius y R. Cochichinensis. Con MCPA se logró un control temporal de las malezas. En cuanto a las variables de rendimiento , la labranza convencional, presento un mayor número de semillas por panoja, mientras que en labranza mínima se logró un mayor peso de 1000 semillas: El rendimiento oscilo entre 1.86 y 3.45 t/ha, demostrando el negativo efecto del enmaleza miento: el mayor rendimiento se presentó en labranza convencional y en el tratamiento MCPA.

Edital nº 44/87 : concurso público para Assistente Administrativo

Torna pública a abertura de inscrição para concurso público destinado ao preenchimento de cargos de Assistente Administrativo, do Grupo-Atividades de Apoio Legislativo da Câmara dos Deputados.

Aquaculture Asia, Vol.14, No.3, pp.1-44, July-September 2009

Sustainable aquaculture Contrasting community management and revenue sharing practices of culture-based fisheries in Lao PDR Saphakdy, B., Phomsouvanh, A., Davy, B., Nguyen, T.T.T. and De Silva, S.S.; Floodplain aquaculture in Begumgonj: New horizon for rural livelihoods in Bangladesh Hossain, M. S.; Promoting small-scale inland aquaculture in Papua New Guinea Edwards, P.; Group approach to shrimp farming: The key to sustainability Kumaran, M.; Research and farming techniques Native catfish culture - a technology package for fish farmers Haniffa, M. A.; An assessment on the influence of salinity in the growth of black clam (Villorita cyprinoides) in cages in Cochin estuary with a special emphasis on the impact of Thennermukkom Salinity Barrier Arun, A. U.; Aquatic animal health EUS in Asia and Africa: Stimulus for regional initiatives!!! Mohan, C.V. Marine Finfish Aquaculture Network Offshore opportunities for artisanal aquaculture Stock, C.; Grouper aquaculture in Brazil Sanches, E.G. and Von Seckendorff, R.W. NACA Newsletter

On the ecology of species belonging to the genus Mesocyclops Sars (Crustacea, Copepoda) dwelling in the water-bodies of the Urals and Pri-Ural territory. [Translation from: Zoologicheskie Zhurnal 44(1) 127-130, 1965. ]

In the waterbodies of central Russia, the Urals and western Siberia four species of Crustacea, related to the genus Mesocyclops, are widely distributed: M. (s.str.) leuckarti (Claus), M. (Thermocyclops) oithonoides Sars, [M.](Th.) crassus (Fisch.) and M. (Th.) dybowskii (Lande). Numbers and biomass of Mesocyclops oithonoides in the pelagic water of various water-bodies of the Urals are presented and observations on the above mentioned species are discussed.