Results 21 to 30 of about 22,765 (228)
Les auteurs analysent la saisonnalité de la feuillaison de 28 espèces ligneuses sahéliennes afin de caractériser les disponibilités saisonnières en feuillage fourrager ainsi que leurs variations interannuelles.
P.H.Y. Hiernaux +3 more
doaj +1 more source
Analisi comparativa delle prestazioni energetiche (termiche ed elettriche) negli impianti a biomasse [PDF]
Questo elaborato tratta delle tecnologie sfruttabili con le biomasse. Dopo una breve introduzione sul mondo delle biomasse e sui problemi energetici legati all’effetto serra, si passa a descrivere i vari metodi usati per estrarre energie da questi ...
Galiotto, Marco
core
Production and turnover of organic matter in three southern European Fagus sylvatica L. Stands
[fr] Les biomasses aériennes, les retombées de litières, leur accumulation à la surface du sol et leur décomposition, ont été étudiées dans trois hêtraies méditerranéennes d'Italie, de France et d'Espagne, pour mieux connaître la restitution au sol des ...
I. Santa Regina +4 more
doaj +1 more source
Dans les zones arides, la production fourragère est limitée à cause des sécheresses fréquentes. Combler le déficit fourrager dépend de la diversification des ressources alimentaires. Medicago arborea, serait une alternative.
M. El Koudrim, A. Chriyaa, S. Hilali
doaj +1 more source
Congo Basin Carbon Cycle Responses to Global Change. [PDF]
Understanding the resilience of the Congo Basin carbon cycle in the face of current and future pressures requires a detailed understanding of its response to past and present drivers of change. Building on a pantropical framework of drivers and possible regional mechanisms for resilience, this review provides the first comprehensive assessment of Congo
Worden S +17 more
europepmc +2 more sources
Lokale Akzeptanz von Energiemixen
Der Beitrag thematisiert lokale Aspekte der Bewertung von Energiemixen erneuerbarer Energien (Solar- und Windenergie, Biomasse). Die Ergebnisse einer szenariengeleiteten Online-Fokusgruppenbefragung zeigen, dass dominant ausgeprägte Energieformen des ...
Agnes Grabietz +2 more
doaj +1 more source
En pâturage tournant, la gestion du pâturage par les éleveurs détermine en partie les performances des vaches laitières et la valorisation de l’herbe.
R. DELAGARDE, L.A. PÉREZ-PRIETO
doaj +1 more source
The development of a fully automated on-line monitoring and control system is very important in bioprocesses. One of the most important parameters in these processes is biomass. This review discusses different methods for biomass quantification. A general definition of biomass and biovolume are presented.
Madrid, Rossana Elena +1 more
openaire +3 more sources
Identification and Quantitative Determination of Lignans in Resins using C NMR Spectroscopy
Identification and quantitative determination of individual components of resin collected on the trunk of 28 Cedrus atlantica trees, grown in Corsica, has been carried out using 13 C NMR spectroscopy.
Anne-Marie Nam +4 more
doaj +1 more source
Biomass Production and Biomass Conversion
1. The amount of biomass available on the earth.2. Three values of biomass: i) food, ii) energy and iii) materials (raw organic materials and timber)3. The use of photosynthesis mechanism f or high production of biomass and f or production of hydrogen.4.
openaire +2 more sources

