Results 31 to 40 of about 533,192 (191)

A photonic chip based frequency discriminator for a high performance microwave photonic link [PDF]

, 2010
We report a high performance phase modulation direct detection microwave photonic link employing a photonic chip as a frequency discriminator. The photonic chip consists of five optical ring resonators (ORRs) which are fully programmable using thermo ...
Hoekman, Marcel, Leinse, Arne, Marpaung, David, Roeloffzen, Chris   +3 more
core   +3 more sources

Targeted Photodynamic Therapy: A Novel Approach to Abolition of Human Cancer Stem Cells

International Journal of Optics, 2018
Cancer is a global burden that has prompted extensive research into prevention and treatment, over many decades. Scientific studies have shown that subset of cells within a tumour, known as cancer stem cells (CSCs), are responsible for tumourigenesis ...
Anine Crous, Elvin Chizenga, Natasha Hodgkinson, Heidi Abrahamse   +3 more
doaj   +1 more source

The hospital environment versus carriage: transmission pathways for third-generation cephalosporin-resistant bacteria in blood in neonates in a low-resource country healthcare setting

Scientific Reports, 2022
Neonatal bloodstream infections (BSI) can lead to sepsis, with high morbidity and mortality, particularly in low-income settings. The high prevalence of third-generation cephalosporin-resistant organisms (3GC-RO) complicates the management of BSI ...
Dory Kovacs, Vitus Silago, Delfina R. Msanga, Stephen E. Mshana, Jeremiah Seni, Katarina Oravcova, Louise Matthews   +6 more
doaj   +1 more source

Enhancing Oxygen Reduction Reaction Activity on Pt/C Catalysts for PEFCs Using Phosphonium Ionic Liquid Layers: Effects of Proton Introduction and Physicochemical Properties

Electrochemistry
Polymer electrolyte fuel cells (PEFCs) have attracted significant attention as clean energy conversion systems. Pt nanoparticles are commonly used as cathode catalysts in PEFCs due to their high activity for the oxygen reduction reaction (ORR).
Hirohisa YAMADA, Takuya OKADA, Mitsuhiro MATSUMOTO, Yu YAO, Uta ANDO, Yuri OI, Toshikazu HIGASHI, Yohtaro INOUE, Katsuhiko TSUNASHIMA   +8 more
doaj   +1 more source

Mn3O4@CoMn2O4-CoxOy nanoparticles : partial cation exchange synthesis and electrocatalytic properties toward the oxygen reduction and evolution reactions [PDF]

, 2016
Mn3O4@CoMn2O4 nanoparticles (NPs) were produced at low temperature and ambient atmosphere using a one -pot two-step synthesis protocol involving the cation exchange of Mn by Co in preformed Mn3O4 NPs. Selecting the proper cobalt precursor, the nucleation
Andreu, Teresa, Arbiol, Jordi, Cabot Codina, Andreu, Cadavid, Doris, de la Mata, María, Genç, Aziz, Ibañez, María, Irtem, Erdem, Liu, Yu, Llorca Piqué, Jordi, Luo, Zhishan, Martí Sanchez, Sara, Morante Lleonart, Joan Ramon, Nafria Soler, Raquel   +13 more
core   +3 more sources

Density functional theory study of active sites on nitrogen-doped graphene for oxygen reduction reaction

Royal Society Open Science, 2021
Oxygen reduction reaction (ORR) remains challenging due to its complexity and slow kinetics. In particular, Pt-based catalysts which possess outstanding ORR activity are limited in application with high cost and ease of poisoning.
Ping Yan, Song Shu, Longhua Zou, Yongjun Liu, Jianjun Li, Fusheng Wei   +5 more
doaj   +1 more source

Co3O4 Nanocrystals on Graphene as a Synergistic Catalyst for Oxygen Reduction Reaction

, 2011
Catalysts for oxygen reduction and evolution reactions are at the heart of key renewable energy technologies including fuel cells and water splitting.
AA Gewirth, AJ Bard, AJ Bard, AJ Esswein, C Nethravathi, CWB Bezerra, D Long, DG Nocera, F Bidault, FA Cotton, G Chen, H Meng, H Wang, H Wang, Hailiang Wang, HL Wang, Hongjie Dai, JG Zhou, JG Zhou, Jian Wang, Jigang Zhou, JS Spendelow, K Gong, KJJ Mayrhofer, L Qu, L-S Zhang, M De Koninck, M Lefevre, M Piana, M Winter, MW Kanan, NS Lewis, R Bashyam, R Liu, S Escribano, S Trasatti, TC Rojas, Tom Regier, TS Olson, UA Paulus, V Mehta, W Jin, Y Dong, Y Gorlin, Y Li, Yanguang Li, Yongye Liang, YY Liang   +47 more
core   +1 more source

‘Being an artist you kind of, I mean, you get used to excellence’: Identity, Values and Fine Art Assessment Practices [PDF]

, 2011
In this article I report on a study into fine art lecturers’ assessment practices in higher education. This study explores the ways that lecturers bring themselves into the act of assessment (Hand & Clewes 2000).
Orr, Susan
core   +1 more source

Height bounds and the Siegel property [PDF]

, 2018
Let $G$ be a reductive group defined over $\mathbb{Q}$ and let $\mathfrak{S}$ be a Siegel set in $G(\mathbb{R})$. The Siegel property tells us that there are only finitely many $\gamma \in G(\mathbb{Q})$ of bounded determinant and denominator for which ...
Orr, Martin
core   +2 more sources

Unrevealing the Impact of Annealing Condition on Catalytic Activity of PtNi Alloy Electrode Towards Oxygen Reduction Reaction

Indonesian Journal of Chemistry
Alloying platinum (Pt) with transition metals such as nickel (Ni) has been an effective approach for reducing Pt loading and enhancing catalytic activities towards the sluggish oxygen reduction reaction (ORR) on the cathode of proton exchange membrane ...
Anindya Pramudya Wardhani, Salwaa Tanaya, Retna Deca Pravitasari, Damisih Damisih, Dewi Kusuma Arti, Sri Rahayu, Muhammad Didik Gumelar, Elok Fidiani   +7 more
doaj   +1 more source