Biofuel by-product for poultry diets

Poster (2012, February 28)

Influence of reducing agent on microbial fermentation characteristics using an in vitro gas production method

Poster (2012, February 10)

Rapport scientifique et technique de mi-convention pour l'évaluation intermédiaire du projet HYDRASANTE

Report (2012)

Pure species of grass discrimination with the help of hyperspectral imaging NIR

in Agronomy Series of Scientific Research = Lucrari Stiintifice Seria Agronomie (2011, December), 54(2), 23-27

The possibilities to discriminate with hyperspectral imaging system, SWIR ImSpector N25E in grass mixtures of the pure species Festuca rubra L., Trifolium repens L., Agrostis capillaris L., Hieracium ... [more ▼]

The possibilities to discriminate with hyperspectral imaging system, SWIR ImSpector N25E in grass mixtures of the pure species Festuca rubra L., Trifolium repens L., Agrostis capillaris L., Hieracium aurantiacum L., Arnica montana L.was the objective of this study. All the samples were collected from natural meadows, from the National Apuseni Park, Apuseni Mountains, from Gârda area. The samples were naturally dried then prepared using the protocol for NIRS analyze. The model built with PLS–DA, was used to demonstrate wether the classes discrimination between pure species is possible or not. The goal of this study was to see in other images if the pure species are or are not recognized according to the spectral data base. The potential of using the Hyperspectral Imaging NIR (Camera NIR) to discriminate or to identify pure species was confirmed. For this technique the MatLab program was used .A percentage of more than 96% correct prediction for species discrimination was obtained. This study should drive to a more important point, which is to verify whether the toxic species are or are not used as food for animals in the natural meadows. The floristic composition of a meadow can be determined only if we have in the data base, dates for each identified species, as being part of the mix. [less ▲]

In vitro evaluation of the prebiotic potential of new carbohydrates extracted from agro-industrial byproducts

Poster (2011, November 16)

Research on Crude Protein Contents in Medicago Sativa Hay Harvest During 2008-2009 Using FT-NIR Spectrometry

in Bulletin UASVM Agriculture (2011, September 29)

Medicago sativa or Alfalfa is a flowering plant that belongs to Pea Family that is widely grown throughout the world as forage for cattle, and is most often harvested as hay. Medicago Sativa usually has ... [more ▼]

Medicago sativa or Alfalfa is a flowering plant that belongs to Pea Family that is widely grown throughout the world as forage for cattle, and is most often harvested as hay. Medicago Sativa usually has the highest nutritive value of all common hay crops. This work aims to highlight a way for direct, non-destructive analysis of crude protein content in Medicago sativa hays. The primary objective was to build a model for crude protein calibration for Medicago sativa based on FT-NIR spectroscopy. The samples for analysis were collected over two experimental years (2008-2009) from field trials from the research station– Agricultural Development, Jucu. In order to construct the model, references values are needed; for this reason, crude protein content was determined using the classical Kjeldahl method (Kjeltec Auto Analyser, Tecator). The values for crude protein ranged from 12.63% to 19.12% on the dry matter basis. The regression models build was based on Partial Least Squares (PLS) calculated with the SIMPLS algorithm, using different pre-processing techniques and leave-one-out cross validation. Calibration of the two years together drove to a coefficient of determination for cross validation,R2, of 0.965. The robustness of the model was confirmed by applying it to independent samples (external validation) where the coefficient of determination was R2 = 0.977, RMSEP = 0.8. The results obtained indicated that NIRS can be used to determine crude protein, which could be used as a criteria for quality control of Medicago sativa hays. [less ▲]

Ex vivo ruminal cellulosome for by-product biomass conversion

Conference (2011, April 27)

Rapport de recherche (mission du du 1er janvier 2010 au 28 février 2011): Valorisation par la volaille des hydrates de carbone de structure issus des industries agro-alimentaires: effets des enzymes fibrolytiques ruminales

Report (2011)

In vitro antagonistic activity evaluation of Lactic Acid Bacteria (LAB) combined with cellulase enzyme against Campylobacter jejuni growth in co-culture

in Journal of Microbiology and Biotechnology (2011), 21(1), 62-70

The antibacterial effects of nine Lactic Acid Bacteria (LAB) on Campylobacter jejuni were investigated using agar gel diffusion and co-culture assay. Inhibition potential was not the same between both ... [more ▼]

The antibacterial effects of nine Lactic Acid Bacteria (LAB) on Campylobacter jejuni were investigated using agar gel diffusion and co-culture assay. Inhibition potential was not the same between both techniques. Only two LAB, Lb. pentosus CWBI B78 and E. faecium THT, showed an anti-campylobacter activity in co-culture assay in using dehydrated poultry excreta mixed with ground straw (DPE/GS) as the only growth substrate source. It was observed that the complementation with Cellulase A complex (Beldem S.A.) of this medium enhanced antimicrobial effect of both bacteria. The co-culture medium acidification was correlated with the concentration in supplemented enzyme. The antibacterial effect was characterized by the production of lactic acid by the homofermentative E. faecium THT and the lactic and acetic acids production by the heterofermentative Lb. pentosus CWBI B78. The antagonistic properties from bacteria-enzyme cooperation could reduce the prevalence of Campylobacter consequently the risk of human infection. [less ▲]

NovaUdderHealth: Développement d’outils novateurs de suivi de la santé du pis basés sur des changements de la composition du lait (Rapport d’activités final du premier mandat, Mars 2009 – Septembre 2011)

Report (2011)