Results 71 to 80 of about 86,149 (213)

Chemical Composition of the Essential Oil from Corsican Combined Analysis by GC(RI), GC-MS and C NMR Spectroscopy

open access: yesNatural Product Communications, 2011
The essential oil (EO) of M. aquatica L. growing wild in Corsica was isolated by dry vapor distillation and submitted to combined analysis by column chromatography over silica gel, GC(RI), GC-MS and 13 C NMR spectroscopy. The composition was dominated by
Sylvain Sutour   +3 more
doaj   +1 more source

Estimation in situ de la respiration des boues activées par application d'un bilan sur l'oxygène [PDF]

open access: yes, 1999
Dans les stations d'épuration à boues activées il est essentiel de maintenir une biomasse de bonne qualité ceci afin que l'eau soit traitée correctement. Un des paramètres caractéristiques de l'activité de la biomasse est la respiration spécifique (c'est
Audic, J. M., Chatellier, P.
core   +1 more source

Warming benefits to sheep fescue are negated by nearby plants and moss–lichen layers facilitate mycorrhizae in a tundra

open access: yesEcosphere, Volume 16, Issue 11, November 2025.
Abstract In systems where low temperatures limit plant productivity, facilitative effects of surrounding vegetation on juvenile plants may outweigh effects of competition for resources. This facilitation could occur through temperature buffering but also via increased availability of root mutualists such as mycorrhizal fungi.
Grace Rose Gutiérrez   +2 more
wiley   +1 more source

Composition and Chemical Variability of the Leaf Oil from Corsican Integrated Analysis by GC(RI), GC-MS and C NMR

open access: yesNatural Product Communications, 2010
The composition of 16 samples of leaf oil from Corsican Juniperus thurifera was investigated by integrated techniques, GC, GC-MS and 13 C NMR. K-means partitioning and PCA analysis of the data allowed the definition of a main group (14 samples) dominated
Josephine Ottavioli   +2 more
doaj   +1 more source

Vermeidung von Verbrennung senkt Primärenergiebedarf deutlich: Strom statt Wärme

open access: yesPhysik in unserer Zeit, Volume 56, Issue 6, Page 287-295, November 2025.
In der Energiewende geht es auch um den Umstieg auf strombasierte Technologien wie Wärmepumpen und Elektromobilität. Sie vermeiden Wärme als Zwischenschritt und sind dadurch wesentlich effizienter. Dies kann den Bedarf an Primärenergie in Zukunft deutlich senken, der dann vollständig durch den Ausbau von erneuerbaren Energien gedeckt werden kann. Warum
Axel Kleidon, Harald Lesch
wiley   +1 more source

Allelopathic effects of Rumex obtusifolius leaf extracts against native grassland species [PDF]

open access: yes, 2006
In perennial grasslands R. obtusifolius (broad-leaved dock) is often surrounded by certain plant species. Thus, it is hypothesized for the current study that Rumex can affect their neighbouring plant species by allelopathic interactions.
Zaller, Johann G.
core  

Spatial context allows the evolution of the control of nitrification by plants

open access: yesJournal of Ecology, Volume 113, Issue 11, Page 3478-3490, November 2025.
Using a theoretical approach, we show that assuming that the effects of the control of nitrification are spatially restricted to the rhizosphere, the control of nitrification is likely to be selected in perennial plants and ecosystems in which nitrate losses are greater than ammonium losses. The selected strategy optimizes biomass production.
Alice Nadia Ardichvili   +4 more
wiley   +1 more source

Economic and CO2 mitigation impacts of promoting biomass heating systems: an input-output study for Vorarlberg, Austria [PDF]

open access: yes
This paper reports on an empirical investigation about the economic and CO2 mitigation impacts of bioenergy promotion in the Austrian federal province of Vorarlberg.
Martin Koller, Reinhard Madlener
core  

Influence of notillage on carbon sequestration and erosion in Brazil [PDF]

open access: yes, 2004
Les sols constituent le plus gros réservoir superficiel de C (hors les roches carbonatées), environ 1500 Gt C, ce qui équivaut à presque trois fois la quantité stockée dans la biomasse terrestre, et deux fois celle de l'atmosphère.
Bernoux, Martial   +8 more
core  

Composition and Chemical Variability of Needle and Berry Oils from Corsican var.

open access: yesNatural Product Communications, 2018
Juniperus communis L. var. communis is widespread in European countries. In Corsica a very small population grows wild in the North-Eastern side of the island. The chemical compositions of nine needle oil samples and three berry oil samples from Corsican
Joséphine Ottavioli   +3 more
doaj   +1 more source

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