Results 81 to 90 of about 642,509 (288)

Annual variability in the radiocarbon age and source of dissolved CO2 in a peatland stream [PDF]

, 2012
Radiocarbon dating has the capacity to significantly improve our understanding of the aquatic carbon cycle. In this study we used a new passive sampler to measure the radiocarbon (14C) and stable carbon (δ13C) isotopic composition of dissolved CO2 for ...
Aufdenkampe, Benner, Bertoni, Billett, Billett, Billett, Billett, Billett, Billett, Billett, Charman, Clark, Clymo, Dawson, Dawson, Dawson, Dawson, Dinsmore, Dinsmore, Dinsmore, Dinsmore, Dinsmore, Eatherall, Evans, Garnett, Garnett, Garnett, Gut, Hardie, Hope, Hope, Johnson, Kling, Koehler, Levin, Levin, Mayorga, Rozemeijer, Slota, Steinmann, Stuiver, Tipping, Vrana   +42 more
core   +2 more sources

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

Advanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal, Laura Calderón‐Rodríguez, Oksana Smirnova, Eren Grossmann, Aparna Binu Varghese, Karen Marlenne Garcia Alvarez, Andreas Schneemann, Thomas Hoyer, Ralf Wyrwa, Felix Helmut Schacher, Alexander Knebel   +10 more
wiley   +1 more source

Dissolved gas analysis: Early fault indication and trend analysis

Transformers Magazine, 2023
A review of the two approaches of dissolved gas analysis – detailed fault diagnosis and trend analysis with fault indication – is given. The advantages and disadvantages of the two approaches under the aspects of measurement uncertainty, economic efficiency and integration into a condition assessment strategy are outlined.
Schübel, Jürgen, Alber (Pollok), Alexander   +1 more
openaire   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

A comprehensive analysis for wind turbine transformer and its limits in the dissolved gas evaluation

Heliyon
This study employs the PRISMA-A methodology to conduct a systematic review of transformer fault diagnostics using Dissolved Gas Analysis (DGA) data. A comprehensive analysis was performed across four major databases—IEEE, Scopus, ScienceDirect (Elsevier),
Ricardo Manuel Arias Velásquez
doaj   +1 more source

A Ni-Doped Carbon Nanotube Sensor for Detecting Oil-Dissolved Gases in Transformers

Sensors, 2015
C2H2, C2H4, and C2H6 are important oil-dissolved gases in power transformers. Detection of the composition and content of oil-dissolved gases in transformers is very significant in the diagnosis and assessment of the state of transformer operations.
Jia Lu, Xiaoxing Zhang, Xiaoqing Wu, Ziqiang Dai, Jinbin Zhang   +4 more
doaj   +1 more source

Helium Saturation of Liquid Propellants [PDF]

The research is in three areas which are: (1) techniques were devised for achieving the required levels of helium (He) saturation in liquid propellants (limited to monomethylhydrazine (MMH) and nitrogen tetroxide (NTO)); (2) the values were evaluated for
Moran, Clifford M., Yavrouian, A. H.
core   +1 more source

Comparison of the Biodegradation of n-alkanes and Readily Biodegradable Substrates Using Open Mixed Culture under Aerobic, Anoxic and Anaerobic Conditions [PDF]

, 2017
Peer reviewedPublisher ...
Dionisi, Davide, Uzukwu, Chukwuemeka
core   +2 more sources

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

Advanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch   +4 more
wiley   +1 more source

Shale Gas Content Calculation of the Triassic Yanchang Formation in the Southeastern Ordos Basin, China

Energies, 2017
Shale gas content is the key parameter for shale gas potential evaluation and favorable area prediction. Therefore, it is very important to determine shale gas content accurately. Generally, we use the US Bureau of Mines (USBM) method for coal reservoirs
Jiao Su, Yingchu Shen, Jin Hao, Bo Liu
doaj   +1 more source