Results 21 to 30 of about 1,256 (262)

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

Small 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, Huimin Zhang, Zichen Shen, Xianglin Liu, Wei Xia, Mengyao Ma, Dong Cao   +6 more
doaj   +1 more source

A review on the applications of zinc tungstate (ZnWO4) photocatalyst for wastewater treatment

Heliyon, 2022
The monoclinic wolframite-phase structure of ZnWO4 materials has been frequently synthesised, characterised, and applied in optical fibres, environmental decontamination, electrochemistry, photonics, catalysis, and not limited to magnetic applications ...
Hassana Ladio Abubakar, Jimoh Oladejo Tijani, Saka Ambali Abdulkareem, Abdullahi Mann, Saheed Mustapha   +4 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]

Biotechnologie, 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

Química 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, Edvan Cirino da Silva, Mario Cesar Ugulino de Araújo, Wallace Duarte Fragoso, Germano Veras   +4 more
doaj   +1 more source

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

Frontiers 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, Meng Qi, Meng Qi, Qian Wu, Peng Xiang, Dejian Tang, Dejian Tang, Qiang Li   +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]

Biotechnologie, 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]

Актуальные 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

Separations, 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

Advanced 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, D. Anjaria, I. Woo, C. Bean, D. Texier, J. C. Stinville   +5 more
wiley   +1 more source

National forest inventory of Finland and its role estimating the carbon balance forests. COST E21 Workshop. Contribution of forests and forestry to mitigate greenhouse effects. Joensuu (Finland). 28-30 Sep 2000 [PDF]

Biotechnologie, Agronomie, Société et Environnement, 2000
The paper presents the total stem volume increment and total drain, as well as the corresponding carbon contents, of the trees of Finnish forests. The carbon contents are converted to carbon dioxide equivalents.
Tomppo E.
doaj