Results 81 to 90 of about 230,886 (294)

Ladder‐Type Benzene‐Perylene Dyes with Efficient Laser Properties in the Near‐IR by Detracting/Activating Low/High Frequency Vibronic Modes

Advanced Functional Materials, EarlyView.
The NNR‐n series of oligomeric nanographenes delivers exceptional emission performance. This work shows that this performance is originated by their ladder‐type structure, which effectively deactivates low‐frequency vibronic modes. This deactivation neglects the main pathway for non‐emissive deactivation, even in the near‐infrared region. The potential
Marcos Díaz‐Fernández, Álex Farrando Pérez, Fernando Gordillo Gámez, Pedro G. Boj, José M. Villalvilla, José A. Quintana, Yanpei Wan, Daniel Aranda, José Manuel Marín‐Beloqui, Jishan Wu, Zebing Zeng, María A. Díaz‐García, Juan Casado   +12 more
wiley   +1 more source

A Lagrangian perspective reveals the carbon and oxygen budget of an oceanic eddy

Communications Earth & Environment
Quantifying the ocean’s ability to sequester atmospheric carbon is essential in a climate change context. Measurements of gravitational carbon export to the mesopelagic seldom balance the carbon demand or the oxygen consumption there, suggesting the ...
Alberto Baudena, Rémi Laxenaire, Camille Catalano, Artemis Ioannou, Edouard Leymarie, Marc Picheral, Antoine Poteau, Sabrina Speich, Lars Stemmann, Rainer Kiko   +9 more
doaj   +1 more source

Combustion method for assay of biological materials labeled with carbon-14 or tritium, or double-labeled [PDF]

, 1969
Dry catalytic combustion at high temperatures is used for assaying biological materials labeled carbon-14 and tritium, or double-labeled. A modified oxygen-flask technique is combined with standard vacuum-line techniques and includes convenience of ...
Huebner, L. G., Kisieleski, W. E.
core   +1 more source

AD–OX: A sequential oxidative process for water treatment— Adsorption and batch CWAO regeneration of activated carbon [PDF]

, 2009
A sequential process for water treatment involving usual adsorption on activated carbon (AC) followed by wet air catalytic oxidation of the adsorbed pollutants has been carried out in a fixed bed reactor with a mixture of two model pollutants.
Creanga-Manole, Carmen, Delmas, Henri, Julcour-Lebigue, Carine, Wilhelm, Anne-Marie   +3 more
core   +2 more sources

CO2 Reduction on Copper‐Nitrogen‐Doped Carbon Catalysts Tuned by Pulsed Potential Electrolysis: Effect of Pulse Potential

Advanced Functional Materials, EarlyView.
This study demonstrates that pulsed potential electrolysis significantly improves CO2 reduction performance on copper‐nitrogen doped carbon electrodes. The formation of cationic copper sites and metallic clusters as a function of applied intermittent potential leads to notable selectivity changes compared to potentiostatic reduction.
Dorottya Hursán, Janis Timoshenko, Andrea Martini, Hyo Sang Jeon, Eduardo Ortega, Martina Rüscher, Arno Bergmann, Aram Yoon, Uta Hejral, Antonia Herzog, Clara Rettenmaier, Felix T. Haase, Philipp Grosse, Beatriz Roldan Cuenya   +13 more
wiley   +1 more source

Investigating the Advantages and Future Prospects of Biological Carbon Sequestration Technologies [PDF]

MATEC Web of Conferences
The worsening climate crisis, primarily driven by anthropogenic greenhouse gas emissions, poses significant risks to ecosystems and human society. Accordingly, this essay explores carbon sequestration as an effective complement to traditional carbon ...
Liu Bokai
doaj   +1 more source

The Role of Zooplankton in Establishing Carbon Export Regimes in the Southern Ocean – A Comparison of Two Representative Case Studies in the Subantarctic Region

Frontiers in Marine Science, 2020
Marine ecosystems regulate atmospheric carbon dioxide levels by transporting and storing photosynthetically fixed carbon in the ocean’s interior. In particular, the subantarctic and polar frontal zone of the Southern Ocean is a significant region for ...
Svenja Halfter, Emma L. Cavan, Kerrie M. Swadling, Ruth S. Eriksen, Ruth S. Eriksen, Philip W. Boyd   +5 more
doaj   +1 more source

Biological Carbon Pump and Microbial Carbon Pump in Changing Oceans

, 2022
Ocean Biogeochemistry Gordon Research Conference, Biogeochemical Processes Across Space and Time, 1-6 May 2022, Castelldefels, Spain Peer ...
openaire   +1 more source

The physics of the biological carbon pump.

Journal of sea research, 2009
The growth, sinking and remineralisation of phytoplankton constitute the soft-tissue carbon pump. Here we derive the expression for the strength of this carbon pump in terms of the nutrient utilisation and the carbon:nutrient ratio of plankton. Furthermore, we aim to determine how the physical environment affects this carbon pump. Thereto, we have used
Omta, A.W., Bruggeman, J., Kooijman, S.A.L.M., Dijkstra, H.A.   +3 more
openaire   +1 more source

Cryo‐EM of Rationally Designed Photosystem I Nanoassembly on Graphene Validates Orientation‐Driven Enhancement of Photocatalytic Performance

Advanced Functional Materials, EarlyView.
The first cryo‐EM visualization and quantification of oriented Photosystem I (PSI) on single‐layer graphene is reported. Domain‐specific covalent anchoring of PSI, with the reducing side of the biophotocatalyst toward graphene, promotes three‐fold higher anodic photocurrent generation compared to a randomly physisorbed counterpart. This approach allows
Miriam Izzo, Margot Jacquet, Tomasz Góral, Marcin Strawski, Takayuki Fujiwara, Shin‐ya Miyagishima, Joanna Kargul   +6 more
wiley   +1 more source