Results 21 to 30 of about 1,253 (259)

Forests and the national greenhouse gas inventory of Germany. COST E21 Workshop. Contribution of forests and forestry to mitigate greenhouse effects. Joensuu (Finland). 28-30 Sep 2000 [PDF]

open access: yesBiotechnologie, Agronomie, Société et Environnement, 2000
Since 1995, experiences have been gathered with the calculation of National Greenhouse Gas Inventories in Germany. Because only marginal changes of the total forested area occur in Germany, relevant changes of the balance of greenhouse gases in the ...
Baritz R., Strich S.
doaj  

Entropy and Phase Coexistence in Clusters: Metals vs. Nonmetals

open access: yesEntropy, 2010
Small clusters violate the Gibbs phase rule by exhibiting two or more phases in thermodynamic equilibrium over bands of temperature and pressure. The reason is the small number of particles comprising each system.
Richard Stephen Berry   +1 more
doaj   +1 more source

Construction and Prospect of Noble Metal‐Based Catalysts for Proton Exchange Membrane Water Electrolyzers

open access: yesSmall Structures, 2023
Engineering noble metal‐based electrocatalysts (NMEs) with high activity is of vital importance to accelerate the hydrogen production from proton exchange membrane water electrolyzers (PEMWEs).
Xiaoyan Guo   +6 more
doaj   +1 more source

Contribution of forests and forestry in Finland to mitigate greenhouse effect. COST E21 Workshop. Contribution of forests and forestry to mitigate greenhouse effects. Joensuu (Finland). 28-30 Sep 2000 [PDF]

open access: yesBiotechnologie, Agronomie, Société et Environnement, 2000
Ministry of the Environment is coordinating matters related to the unitéd Nation Framework Convention on Climate Change. National reporting of greenhouse gas inventories for land-use change and forestry category utilises forest inventory results with ...
Karjalainen,T., Maekipaeae R.
doaj  

Classificação periódica: um exemplo didático para ensinar análise de componentes principais Periodic classification: a didactic example to teach principal component analysis

open access: yesQuímica Nova, 2010
A dataset of chemical properties of the elements is used herein to introduce principal components analysis (PCA). The focus in this article is to verify the classification of the elements within the periodic table.
Wellington da Silva Lyra   +4 more
doaj   +1 more source

Recent research progress on the synthesis and biological effects of selenium nanoparticles

open access: yesFrontiers in Nutrition, 2023
Selenium is an essential trace element for the human body, with the chemical and physical characteristics of both metals and nonmetals. Selenium has bioactivities related to the immune system, antioxidation, anti-virus, and anti-cancer. At the same time,
Ting Zhang   +7 more
doaj   +1 more source

Carbon sequestration in Danish forests. COST E21 Workshop. Contribution of forests and forestry to mitigate greenhouse effects. Joensuu (Finland). 28-30 Sep 2000. [PDF]

open access: yesBiotechnologie, Agronomie, Société et Environnement, 2000
The Danish national reports on land-use change and forestry has so far only considered C sequestration in existing forests and in afforestation areas on former arable land. The standing stock of wood in existing forests was 55.2 millions cubic m in 1990,
Vesterdal L.
doaj  

THE RELATIONSHIP BETWEEN THE CHEMICAL STRUCTURE OF IА–VIIА SUBGROUPS METAL HYDRIDES (NON-METALS) OF D.I. MENDELEEV’S PERIODIC TABLE AND THEIR FIRE AND EXPLOSIVE PROPERTIES [PDF]

open access: yesАктуальные вопросы пожарной безопасности
An analysis of the relationship between the chemical structure of IA–VIIA subgroups metal hydrides (nonmetals) of D.I. Mendeleev’s periodic table and their fire and explosive properties has been performed.
Leonid P. Vogman, Alexandr V. Ilyichev
doaj   +1 more source

Recent Progress in Photocatalytic Removal of Environmental Pollution Hazards in Water Using Nanostructured Materials

open access: yesSeparations, 2022
Water pollution has become a critical issue because of the Industrial Revolution, growing populations, extended droughts, and climate change. Therefore, advanced technologies for wastewater remediation are urgently needed.
Nadiyah Alahmadi
doaj   +1 more source

Slip Localization Intensification Mediated by Grain Boundary Sliding in a Polycrystalline Nickel‐Based Superalloy

open access: yesAdvanced Engineering Materials, EarlyView.
The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat   +5 more
wiley   +1 more source

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