Results 21 to 30 of about 1,676,233 (250)

Optimization of phosphate oxygen isotope pretreatment measurement method based on phosphate in situ enrichment blanket

Water Science and Technology, 2023
Phosphate oxygen isotope analysis is an effective tool for investigating phosphorus migration and transformation in water bodies. Unfortunately, current pretreatment methods for this technology are significantly limited due to their demanding sample ...
Sumei Li, Chengyu Du, Xin Jin, Jing Yang, Wei Zhang, Simin Li   +5 more
doaj   +1 more source

Oxygen as a control on seafloor biological communities and their roles in sedimentary carbon cycling [PDF]

, 2007
13C tracer experiments were conducted at sites spanning the steep oxygen, organic matter, and biological community gradients across the Arabian Sea oxygen minimum zone, in order to quantify the role that benthic fauna play in the short-term processing of
Lisa A. Levin, Larkin, K.E., Larkin, K. E., Jack J. Middelburg, Andersson, J. H., Woulds, Clare, Schumacher, S., Cowie, G. L., Middelburg, J.J., Greg L. Cowie, Andrew J. Gooday, Woulds, C., Gooday, Andrew, Jeffreys, R. M., Stefanie Schumacher, Schwartz, M., Johan H. Andersson, Larkin, Kate, Jeffreys, R.M., Kate E. Larkin, Andersson, J.H., Gooday, A. J., Matthew Schwartz, Whitcraft, C., Cowie, G.L., Vandewiele, S., Middelburg, J. J., Whitcraft, Christine, Rachel M. Jeffreys, Sandra Vandewiele, Schumacher, Stefanie, Peter A. Lamont, Middleburg, J.J., Schwartz, Matthew, Clare Woulds, Levin, L A, Levin, L. A., Christine Whitcraft, Middelburg, JJ, Cowie, G, Gooday, A.J., Schwarz, M., Vandewiele, Sandra, Levin, L.A., Vandewiele, S.L., Jeffreys, Rachel, Lamont, P. A., Lamont, Peter, Lamont, P.A., Andersson, Johan H., Middelburg, Jack J, Jeffreys, Rachel M, Gooday, Andrew J, Andersson, Johan H, Larkin, Kate E, Cowie, Greg L, Lamont, Peter A, Levin, Lisa A   +57 more
core   +4 more sources

Oxidation of Ti–6Al–4V alloy between 450 and 600°C. Evolution of microstructure and mechanical properties [PDF]

MATEC Web of Conferences, 2020
Titanium alloys are widely used in many applications thanks to their good corrosion resistance and to their high specific modulus. However, at temperatures above 450°C, oxidation must be taken into account to improve life assessment of components ...
Poquillon Dominique, Parrens Coralie, Pugliara Alessandro, Perrais Maxime, Malard Benoit   +4 more
doaj   +1 more source

Self-Enrichment in Globular Clusters: The Crucial Role Played by Oxygen

Universe, 2023
Results from photometry and high-resolution spectroscopy have demonstrated the existence of multiple populations in globular clusters, where one or more stellar generations of stars coexist with the original population.
Erendira Huerta-Martinez, Claudio Gavetti, Paolo Ventura   +2 more
doaj   +1 more source

Effects of oxygen enrichment and hydrogen addition on the instability of biogas-air premixed flames formed on a flat burner

Nihon Kikai Gakkai ronbunshu, 2023
This study focused on the biogas-air premixed flames formed on a flat burner under the conditions of oxygen enrichment and hydrogen addition to improve the combustion characteristics of biogas-air premixtures.
Yui AKAGAWA, Ryosuke NOGI, Daisuke SATO, Toshiyuki KATSUMI, Satoshi KADOWAKI   +4 more
doaj   +1 more source

Generalization of a CFD Model to Predict the Net Power in PEM Fuel Cells [PDF]

Hydrogen, Fuel Cell & Energy Storage, 2019
Qualitatively, it is known that the reactants content within the catalyst layer (CL) is the driving moments for the kinetics of reaction within the CL.
Asrin Ghanbarian, Mohammad Jafar Kermani, Joachim Scholta   +2 more
doaj   +1 more source

Study of sewage oxygenation treatment based on gas magnetization mechanism

Water Science and Technology, 2022
In the process of sewage treatment, the sewage usually needs to be aerated, so the oxygenation efficiency is an important indicator for the aerator. The general oxygenation technique is to inject large amount of natural air into the aeration tank over ...
Keli Zhao, Hui Wu, Xianghe Zhao, Yuqi Liu, Aiwei Yu, Zunhai Man   +5 more
doaj   +1 more source

Experimental Study on Oxygen-Enriched Sintering of Vanadium-Titanium Magnetite

Journal of Chemistry, 2018
The influences of various factors, such as oxygen enrichment time, oxygen enrichment load, and ignition temperature, on the technical indices and sintering performance in the vanadium-titanium magnetite sintering process are simulated using sinter pot ...
Hao Liu, Yuelin Qin, Xinlong Wu, Bing Xie   +3 more
doaj   +1 more source

Oxygen enrichment characteristics of an enclosed architectural space under anoxic conditions

工程科学学报, 2018
A set of experimental devices for the measurement of indoor oxygen supply in an enclosed architectural space was built. The devices were used to analyze the effects of the number and diameter of oxygen-feeding ports, oxygen flow rate, and oxygen-feeding ...
ZHANG Chuan-zhao, LIU Ying-shu, WANG Hao-yu, WU Yi-min, MA Xiao-jun, CHEN Fu-xiang   +5 more
doaj   +1 more source

Combustion enhancement in a scramjet engine using oxygen enrichment and porous fuel injection [PDF]

, 2015
This paper reports on the experimental testing of oxygen-enriched porous fuel injection in a scramjet engine. Fuel was injected via inlet mounted, oxide-based ceramic matrix composite (CMC) injectors on both flow path surfaces that covered a total of 9.2%
Kuhn, Markus, Hald, Hermann, Capra, Bianca R., Boyce, Russell R.   +3 more
core   +1 more source