Results 41 to 50 of about 128,004 (334)

First principles study of magnetism in nanographenes

, 2007
Magnetism in nanographenes (also know as polycyclic aromatic hydrocarbons, or PAHs) are studied with first principles density functional calculations. We find that an antiferromagnetic (AFM) phase appears as the PAH reaches a certain size. This AFM phase
Dai, Sheng, Jiang, De-en, Sumpter, Bobby G.   +2 more
core   +1 more source

Emerging 2D Materials and Their Hybrid Nanostructures for Label‐Free Optical Biosensing: Recent Progress and Outlook

Advanced Functional Materials, EarlyView.
This review highlights recent advances in label‐free optical biosensors based on 2D materials and rationally designed mixed‐dimensional nanohybrids, emphasizing their synergistic effects and novel functionalities. It also discusses multifunctional sensing platforms and the integration of machine learning for intelligent data analysis.
Xinyi Li, Yonghao Fu, Yuehe Lin, Dan Du
wiley   +1 more source

Tailoring the Properties of Functional Materials With N‐Oxides

Advanced Functional Materials, EarlyView.
The properties of materials bearing N‐oxide groups are often dominated by the polar N+─O− bond. It provides hydrophilicity, selective ion‐binding, electric conductivity, or antifouling properties. Many of the underlying mechanisms have only recently been discovered, and the interest in N‐oxide materials is rapidly growing.
Timo Friedrich, Michelle Kobus, Shirin Mesgarha, Erica Moretto, Laurens Grosche, Wolfgang Maison   +5 more
wiley   +1 more source

Accumulation and Ecological Risk of Heavy Metals and Polycyclic Aromatic Hydrocarbons (PAHs) in Surface Sediments from Typical Estuaries in Hainan Island

Yankuang ceshi, 2022
BACKGROUND Heavy metals and polycyclic aromatic hydrocarbons (PAHs) are the ecological research focus because of their teratogenicity, carcinogenicity, and mutagenicity.
YANG Jianzhou, MA Shengming, WANG Zhenliang, BIAN Yuan, GONG Jingjing, GAO Jianweng, ZHAO Jinhua, HU Shuqi, TANG Shixin   +8 more
doaj   +1 more source

Evaluation of polycyclic aromatic hydrocarbons using analytical methods, toxicology, and risk assessment research: seafood safety after a petroleum spill as an example. [PDF]

, 2014
BackgroundPolycyclic aromatic hydrocarbons (PAHs) are abundant and widespread environmental chemicals. They are produced naturally and through man-made processes, and they are common in organic media, including petroleum.
Ansari, Shakeel, Blake, Diane, Echsner, Stephen, Elferink, Cornelis, Fernando, Harshica, Frickel, Scott, Gauthe, David, Howard, Jessi, Kane, Andrew, Miller, Charles, Nguyen, Daniel, Overton, Edward, Simon, Bridget, Trapido, Edward, Wickliffe, Jeffrey, Wilson, Mark   +15 more
core   +1 more source

S-PAH, oxy-PAH and EPA-PAH formation during ethylene-SO2 pyrolysis

Fuel Processing Technology, 2018
Abstract Oxygenated polycyclic aromatic hydrocarbons (oxy-PAH) and sulphurated polycyclic aromatic hydrocarbons (S-PAH) formation during pyrolysis experiments of mixtures of ethylene (3%) and several SO2 concentrations (0.3 to 1%), at different reaction temperatures (1075 to 1475 K), was studied. The sixteen EPA-PAH priority pollutants, classified by
I. Adánez-Rubio, F. Viteri, Á. Millera, R. Bilbao, M.U. Alzueta   +4 more
openaire   +1 more source

Strain‐Activated Photo‐Dehalogenation Unlocks Low‐Energy One and Two‐Photon 3D Microfabrication

Advanced Functional Materials, EarlyView.
5,14‐NMI‐Cz acts, conversely to its 7,10‐NMI‐Cz(7,10‐'dibromo‐2‐(2,6‐diisopropylphenyl)‐1H‐benzo[lmn]carbazolo[9,1‐bc][2,8]phenanthroline‐1,3(2H)‐dione) counterpart, as modular photoinitiator with panchromatic photoactivity, featuring a weak C–Br bond from geometric strain for efficient Type I & II initiation. These studies demonstrate applicability of
Kacper Piskorz, Katarzyna Starzak, Malgorzata Noworyta, Konrad Cyprych, Krzysztof Bartkowski, Zahra Badri, Sukhvinder Dhiman, Cina Foroutan‐Nejad, Jaroslaw Mysliwiec, Marcin Lindner, Joanna Ortyl   +10 more
wiley   +1 more source

Nimesulide-induced Erythema Multiforme Major: A Case Report

Journal of Nepal Medical Association
Erythema Multiforme Major (EMM) is a rare hypersensitivity reaction that primarily affects the skin and mucosa, typically self-limiting. This case discusses a patient who developed severe EMM lesions after consuming nimesulide, a non-steroidal anti ...
Agnimshwor Dahal, Prakash Dhungel, Astha Thapa, Jeevan Gyawali, Amin Shah, Pujan Khadgi, Bhim Chauhan, Prashanna Dip Karki, Nistha Shahi   +8 more
doaj   +1 more source

Spiro‐Phenothiazine Hole‐Transporting Materials: Unlocking Stability and Scalability in Perovskite Solar Cells

Advanced Materials, EarlyView.
Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora, Seung Ju Choi, Jaeki Jeong, Silvia Orecchio, Inés García‐Benito, Manuel Pérez‐Escribano, Joaquín Calbo, Likai Zheng, Minseop Byun, Seyeong Song, Gi‐Hwan Kim, Shaik M. Zakeeruddin, Seog‐Young Yoon, Yimhyun Jo, Agustín Molina‐Ontoria, Enrique Ortí, Nazario Martín, Michael Grätzel   +17 more
wiley   +1 more source

Factors associated with psychological well-being among older adults attending daycare centers of Kathmandu, Nepal: a cross-sectional path-analytical study

BMC Geriatrics
Background As individuals age, their mental health becomes critical to overall well-being. Identifying the various factors influencing psychological well-being (PWB), including social, spiritual, psychological, and individual aspects, is essential ...
Rekha Timalsina, Madhusudan Subedi, Nima Maharjan, Bigya Shah, Pabitra Adhikari   +4 more
doaj   +1 more source