Broccoli (Brassica oleracea var. italica) belongs to the Brassicaceae family. Broccoli immature inflorescence is a rich source of vitamins, phenolic antioxidants, glucosinolates, and fiber (Wang et al., 2017). Fresh broccoli is traditionally marketed whole from open bulk containers.Due to its high metabolic rate, the storage potential of broccoli is only 3-4 days at room temperature (Ma et al., 2014). Refrigeration extends the broccoli postharvest life, generally no more than 3 weeks at 5°C. Likewise, broccoli even loses its nutrients at a very high rate at refrigeration (Nath et al., 2011).Various methodologies have been evaluated to preserves broc-

Background:In this paper we analyze devices for traffic signals (traffic lights) with light-emitting diode (LED) technology.

The impact of led luminaries on road lighting has modified traditional design patterns. The technological change proposes an installation with a higher prime cost and less energy consumption. On the one hand, the price ratio between led luminary and traditional luminary is at least 3:1. On the other, the led better energetic efficiency could allow keeping proper illumination levels with less installed power. In this frame, since mid 2013, the road concessionaires of highways which constitute the Access Network to Buenos Aires city (Argentina), together with Urban Highways of the mentioned city, began a restructuring process of their lighting systems to led technology.Framed in a review of efficiency concepts and energetic classification for road lighting installations, the work presents the main results of the previous evaluation tests and of the reconverted installations, which can be considered as the first led applications at large scale on road lighting of the region.

In an excavation performed in 1999 at the Campo del Pucara, Alamito site, which belongs to the Condorhuasi Culture (From 0 to 500 AD), and is placed near the frontier of Catamarca and Tucumán provinces in the Northwest of Argentina, Victor Nüñez Regueiro and Marta Tartusi Paz found an intriguing archaeological artifact: Remains o f a thin slab of schist covered by a mica sheet, dated from 360 and 480 AD. The mica was analyzed by photometric and interferometric procedures and experimental results suggest that it behaves as an interferential dielectric mirror.

The emergence of led luminaries in street lighting has modified traditional design guidelines. The highest led energy efficiency allows keeping suitable lighting levels with less installed power. Thus, the present design line of a street lighting installation is closely related to the technological change: kind of led to be used, suitable lens, efficacy relationship regarding high pressure sodium, light colour temperature, spectrum. The “impact” associated to with led conversion relegates main aspects of street designs: effect of road reflective properties and installation depreciation. The wear produced by traffic, as well as the environmental conditions gradually modifies the road reflection matrix. In a street lighting installation, this change alters the luminance arrangement on the road together with the perception conditions. This phenomenon is a determining factor within the global concept of depreciation affecting lighting systems in general and also street lighting installations designed by the Luminance Technique. In the present work changes, due to use, in the shape of street reflection matrices of Argentinean highways are analyzed. The analyzed r-tables were obtained through “in-situ” measurements, with road reflectometer. A first group corresponds to the initial conditions of macro textured roads which were measured in the period 2001/2003. The second studied set contains r-tables of the same type, and according to its use the surfaces can be considered in steady state, assessed between 2005 and 2009. The study provides information about the shape of matrixes and its alteration, specularity and scale factor, relating such parameters with the possible effects on the resulting lighting.