Results 31 to 40 of about 4,968,402 (139)

The location of the dense and ionized gas in the NGC 2023 photon-dominated region

, 2000
The VLA and the BIMA array were used to obtain high-resolution (10"-20") observations of C+, traced by the C91 alpha recombination line at 8.6 GHz, and the dense molecular gas, traced by HCN and HCO+(1-0), of the photon-dominated region (PDR) associated ...
Walmsley, CM, Wyrowski, F, Tielens, AGGM, Goss, WM   +3 more
core   +1 more source

Chemistry and ro-vibrational excitation of CH+ in the planetary nebula NGC 7027

Astronomy & Astrophysics
Context. Small carbon hydride cations, such as methylidynium (CH+), are important in the chemistry of the interstellar medium. They participate in a network of gas-phase reactions with a range of molecular and atomic species and lead to the formation of ...
Sil M., Faure A., Wiesemeyer H., Hily-Blant P., González-Lezana T., Forer J., Loreau J., Lique F.   +7 more
doaj   +1 more source

Corticobasal degeneration preceded by cognitive impairment and apathy: An autopsy case report

Psychiatry and Clinical Neurosciences Reports, Volume 4, Issue 3, September 2025.
Abstract Background Corticobasal degeneration (CBD) presents with a range of clinical phenotypes, making diagnosis challenging. We report the clinical course of a patient with autopsy‐confirmed CBD who initially presented with cognitive impairment and apathy, without motor symptoms.
Shoma Hirose, Ryota Kobayashi, Shigeki Hatakeyama, Shinobu Kawakatsu, Akihito Suzuki, Chiaki Kawanishi, Kumiko Utsumi   +6 more
wiley   +1 more source

The water line emission and ortho-to-para ratio in the Orion Bar photon-dominated region

, 2019
Context. The ortho-to-para ratio (OPR) of water in the interstellar medium (ISM) is often assumed to be related to the formation temperature of water molecules, making it a potentially interesting tracer of the thermal history of interstellar gas ...
D. C. Lis, F. Le Petit, Putaud, T., X. Michaut, Le Petit, F., Roueff, E., T. Putaud, E. Roueff, Lis, D., Michaut, X.   +9 more
core   +1 more source

Phosphorus and cover crop management practices affect phosphorus speciation in soils and eroded sediments

Journal of Environmental Quality, Volume 54, Issue 2, Page 382-396, March/April 2025.
Abstract Agricultural runoff often contains P in dissolved and sediment‐bound forms, decreasing surface water quality. No‐till and cover cropping conservation practices have been recommended for reducing erosion and nutrient loss from cropping systems. The overall aims of this study were to characterize and evaluate the effects of fertilizer (placement
Kasuni H. H. Gamage, Ganga M. Hettiarachchi, Nathan O. Nelson, Kraig L. Roozeboom, Gerard J. Kluitenberg, Peter J. Tomlinson, DeAnn R. Presley   +6 more
wiley   +1 more source

ALMA Band 1 observations of the ρ Oph W filament

Astronomy & Astrophysics
Context. The ρ Oph W photo-dissociation region (PDR) is an example source of bright excess microwave emission (EME), over synchrotron, free-free, and the Rayleigh-Jeans tail of the sub-millimetre (sub-mm) dust continuum.
Casassus S., Vidal M., Cárcamo M., Verstraete L., Ysard N., Habart E.   +5 more
doaj   +1 more source

Recent Advances in Strategies to Enhance Photodynamic and Photothermal Therapy Performance of Single‐Component Organic Phototherapeutic Agents

Advanced Science, Volume 12, Issue 7, February 17, 2025.
Single‐component organic phototherapeutic agents (SCOPAs) for photodynamic therapy and photothermal therapy hold promise in treating diseases. This review delves into strategies for enhancing SCOPAs performance, such as boosting ROS generation, improving the photothermal conversion efficiency, and summarizes potential synergies with other therapeutic ...
Laiping Fang, Zengzhen Chen, Jianan Dai, Yujin Pan, Yike Tu, Qi Meng, Yanzhao Diao, Shuaibo Yang, Wei Guo, Liming Li, Jinwu Liu, Hua Wen, Kelei Hua, Lifeng Hang, Jin Fang, Xianwei Meng, Ping'an Ma, Guihua Jiang   +17 more
wiley   +1 more source

Solar Cell Defects Detection Based on Photoluminescence Images and Upgraded YOLOv5 Model

Journal of Engineering, Volume 2025, Issue 1, 2025.
Solar cells (SCs) are prone to various defects, which affect energy conversion efficiency and even cause fatal damage to photovoltaic modules. In this paper, photoluminescence (PL) imaging is used to visualize SC defects, based on which a detection method based on the YOLOv5 model is explored.
Gengcong Xu, Jinhua Huang, Weidong Gong, Jiahui Teng, S. M. Anas   +4 more
wiley   +1 more source

Radiative transfer revisited for emission lines in photon dominated regions

, 2008
Context. Transfer in lines controls the gas cooling of photon dominated regions (PDR) and provides many of the observational constraints that are available for their modelling. Aims.
González García, M., F. Le Petit, Le Bourlot, Jacques, Roueff, Evelyne, M. Gonzalez Garcia, E. Roueff, J. Le Bourlot, Le Petit, Franck   +7 more
core   +1 more source

Overtone Transition 2ν1 of HCO+ and HOC+: Origin, Radiative Lifetime, Collisional Quenching

ChemPhysChem, Volume 25, Issue 21, November 4, 2024.
The C−H/O−H stretch vibration overtone of one of the simplest molecular ion isomeric systems HCO+/HOC+ is studied in a cryogenic ion trap experiment. Moreover, our comprehensive “zero background” method enables the determination of radiative lifetimes and select quenching reaction rates at the same time.
Miguel Jiménez‐Redondo, Liliia Uvarova, Petr Dohnal, Miroslava Kassayová, Paola Caselli, Pavol Jusko   +5 more
wiley   +1 more source