Gaiker Centro Tecnologico

Zamudio, Spain

Gaiker Centro Tecnologico

Zamudio, Spain
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Garcia-Martinez A.M.,University of Seville | Diaz A.,Gaiker Centro Tecnologico | Tejada M.,University of Seville | Bautista J.,University of Seville | And 4 more authors.
Process Biochemistry | Year: 2010

Here, we describe an enzymatic process for soil biostimulant production in which wheat-condensed distiller solubles (WCDS) are converted into a hydrolysate product: WCDS-Enzymatic Extract (WCDS-EE). Physicochemical analyses showed that protein size is the only difference, with WCDS-EE being composed of peptides rather than the original proteins from the raw materials (WCDS). We investigated the influence on soil stimulation and found that dehydrogenase (DHA) and phosphatase (APA) activity, and ATP formation was rapidly increased by both products. However, WCDS-EE was more potent than WCDS. Nevertheless, no differences in bacterial community dynamics were detected using molecular techniques (DGGE of 16S rDNA). We also tested the ability to enhance the biodegradation of petroleum hydrocarbons and found that WCDS-EE is more effective than WCDS. Since the protein size is the most important parameter for biochemical and microbial soil stimulation, this new product could have a high potential for soil recovery, fertilization or bioremediation. © 2010 Elsevier Ltd.

Kucukpinar E.,Fraunhofer Institute for Process Engineering and Packaging | Miesbauer O.,Fraunhofer Institute for Process Engineering and Packaging | Carmi Y.,Hanita Coatings | Fricke M.,BASF | And 9 more authors.
Energy Procedia | Year: 2015

One reason for heat losses in buildings is inadequate insulation. Vacuum Insulation Panels (VIPs) is emerging as a promising solution, being more energy efficient than conventional insulation materials, thinner and lighter. A VIP is made by placing a core insulation material inside a gas-barrier envelope and evacuating the air from inside the panel. The limitations to wide-scale VIP commercialization lie in lack of low-cost and high-volume processes to turn them into products suitable for use in buildings, and their short in-service lifetimes. These drawbacks were researched in a European funded project "Nanolnsulate", and this paper gives an overview of results. © 2015 The Authors.

Garcia-Martinez A.M.,University of Seville | Tejada M.,University of Seville | Diaz A.I.,Gaiker Centro Tecnologico | Rodriguez-Morgado B.,University of Seville | And 2 more authors.
Journal of Agricultural and Food Chemistry | Year: 2010

The purpose of this study was to gather information on the potential effects of organic biostimulants on soil activity and atrazine biodegradation. Carob germ enzymatic extract (CGEE) and wheat condensed distiller solubles enzymatic extract (WCDS-EE) have been obtained using an enzymatic process; their main organic components are soluble carbohydrates and proteins in the form of peptides and free amino acids. Their application to soil results in high biostimulation, rapidly increased dehydrogenase, phosphatase and glucosidase activities, and an observed atrazine extender capacity due to inhibition of its mineralization. The extender capacity of both extracts is proportional to the protein/carbohydrate ratio content. As a result, these enzymatic extracts are highly microbially available, leading to two independent phenomena, fertility and an atrazine persistence that is linked to increased soil activity. © 2010 American Chemical Society.

Briassoulis D.,Agricultural University of Athens | Babou E.,Agricultural University of Athens | Hiskakis M.,Agricultural University of Athens | Scarascia G.,University of Bari | And 3 more authors.
Waste Management and Research | Year: 2013

A review of agricultural plastic waste generation and consolidation in Europe is presented. A detailed geographical mapping of the agricultural plastic use and waste generation in Europe was conducted focusing on areas of high concentration of agricultural plastics. Quantitative data and analysis of the agricultural plastic waste generation by category, geographical distribution and compositional range, and physical characteristics of the agricultural plastic waste per use and the temporal distribution of the waste generation are presented. Data were collected and cross-checked from a variety of sources, including European, national and regional services and organizations, local agronomists, retailers and farmers, importers and converters. Missing data were estimated indirectly based on the recorded cultivated areas and the characteristics of the agricultural plastics commonly used in the particular regions. The temporal distribution, the composition and physical characteristics of the agricultural plastic waste streams were mapped by category and by application. This study represents the first systematic effort to map and analyse agricultural plastic waste generation and consolidation in Europe. © 2013 The Author(s).

Seoane Rivero R.,Gaiker Centro Tecnologico | Bilbao Solaguren P.,Gaiker Centro Tecnologico | Gondra Zubieta K.,Gaiker Centro Tecnologico | Peponi L.,CSIC - Institute of Polymer Science and Technology | Marcos-Fernandez A.,CSIC - Institute of Polymer Science and Technology
Express Polymer Letters | Year: 2016

A series of coumarin-containing branched polyurethanes based on polycaprolactones, hexamethylene diisocyanate and a monohydroxylated coumarin monomer with 5 and 10% content by weight of coumarin units were successfully prepared. Chain architecture was controlled by combination of polycaprolactone (PCL) triol or tetrol with PCL diol. Terminal coumarin units segregated from the polyurethane matrix as measured by differential scanning calorimetry (DSC). Photo-dimerization with 313 nm lamps presented an anomalous behavior in two steps with high irreversibility at high conversions. Photo-dimerization/photo-cleavage reactions showed an increase in irreversibility with the increase in cycles. It was demonstrated that conversion measured by Raman spectroscopy gave the same results than conversion measured by ultraviolet (UV) spectroscopy. Photo-dimerization produced an elastomeric material with much better mechanical properties than non-irradiated material as a consequence of the crosslinking produced. Photo-cleavage decreased the mechanical properties and repeated photo-dimerization increased mechanical properties again. © BME-PT.

Seoane Rivero R.,Gaiker Centro Tecnologico | Bilbao Solaguren P.,Gaiker Centro Tecnologico | Gondra Zubieta K.,Gaiker Centro Tecnologico | Gonzalez-Jimenez A.,CSIC - Institute of Polymer Science and Technology | And 2 more authors.
European Polymer Journal | Year: 2016

A new coumarin diol was designed and used as initiator for the ring opening polymerization of ε-caprolactone. A photo-reactive polyurethane based on the resulting polycaprolactone diol with pendant coumarin moieties was synthesized. Photo-dimerization/photocleavage reactions were studied by UV and Raman. The linear non-irradiated soft polyurethane transformed into a tough elastomeric crosslinked material. DQ-NMR measurements showed that conversion of the photo-reaction was not directly related to relative amount of crosslinking but provided complementary information. Crosslinking reduced the crystallinity of the polycaprolactone segments and the melting point of the crystals. © 2016 Elsevier Ltd. All rights reserved.

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