Time filter

Source Type

Rome, Italy

Giuliano G.,ENEA
Current Opinion in Plant Biology | Year: 2014

Carotenoids are present in plant photosynthetic tissues, where they have essential roles in photoreception and photoprotection, as well as in non-photosynthetic tissues, where they act as colorants, precursors for plant isoprenoid volatiles and signaling molecules (abscisic acid and strigolactones), nutritional antioxidants and vitamin A precursors. This review presents the recent advances in our understanding of their biosynthesis, the key metabolic steps controlling their accumulation in plant non-photosynthetic tissues and their metabolic engineering using multi-gene approaches. © 2014 The Author. Source

Tosti S.,ENEA
International Journal of Hydrogen Energy | Year: 2010

Membrane reactors for producing hydrogen are devices coupling a membrane and a catalyst bed: they perform simultaneously both the reaction and the hydrogen separation. In this way, reaction conversions beyond the thermodynamic values can be attained (shift effect). In particular, Pd-based dense membranes are capable to separate selectively the hydrogen from other gases. Their use into membrane reactors which carry out dehydrogenation reactions permits producing ultra-pure hydrogen. This review considers the techniques of manufacturing Pd-based membranes, the design of membrane reactor modules and the processes for producing pure hydrogen via reforming of hydrocarbons and alcohols. Mainly, the work carried out at ENEA Frascati laboratories and a comparative description of other relevant technologies are considered in this paper. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved. Source

Enea, University of Bergamo and Gualtiero Sepati | Date: 2012-10-03

A method for the manufacturing of textile products in the form of a yarn, web or tow starting from recycled carbon fibers in the form of tuft, cloth or the like, comprising the steps of: (a) discontinuous cutting of the fibers to obtain dimensionally homogeneous fibers of selected length; (b) enzyming of the fibers cut in step (a), wherein the latter are additioned with one or more substances; (c) blending of the fibers treated in step (b) with auxiliary fibers; (d) double carding of the blended fibers obtained in said step (c); and (e) feeding a pair of wicks to a spinning machine.

Conte M.,ENEA
Fuel Cells | Year: 2010

The supercapacitors (SCs), also called ultracapacitors or electrochemical capacitors, are devices with a very high specific power and high capacitance, available for a long period of time with negligible deterioration, that have been historically proposed in small applications (memory back-up in consumer electronics and storage systems for microsolar power generators) and now are proposed for high power/energy applications, such as hybrid and electric vehicles, power quality systems and smart grids. The advancements in new materials and the rapid growth ofmore demanding storage systems in a variety of applications have created a lack of universally accepted definitions of these devices and, consequently, a real difficulty in describing developments and progress in the SC field. This paper contains a brief survey of the history of the SC development, which is strongly related to the evolution of the SC technologies, tentatively classified in symmetric, asymmetric and hybrid. A short presentation of key parameters has been given to introduce the description of new applications with large SC devices, covering transport, industrial and electric utility sectors, with some reflections about the foreseen impacts on the future market more than quadrupled in 5 years up to almost $877 million worldwide. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

A thin-film spectrally selective coating for receiver tube of vacuumed type for use in thermodynamic solar installations and operating both at medium temperature (up to 400 C.) and at high temperature (up to 550 C.), coating where the optically absorbing layer is a multilayer of cermet material of type: W

Discover hidden collaborations