Results 51 to 60 of about 4,605,994 (345)

Diffuse continuum transfer in H II regions

, 2009
We compare the accuracy of various methods for determining the transfer of the diffuse Lyman continuum in HII regions, by comparing them with a high-resolution discrete-ordinate integration.
Abel, Arthur, Bertoldi, Cant��, Cesarsky, Dopita, Franco, Gonz��lez, Hummer, Mellema, Mihalas, O'Dell, Osterbrock, Pavlakis, R. J. R. Williams, Ritzerveld, Robberto, Rubin, W. J. Henney, Whalen, Williams   +20 more
core   +1 more source

On the O/H, Mg/H, Si/H and Fe/H Gas and Dust Abundance Ratios in Galactic and Extragalactic H II Regions

, 2010
We derive the Mg/H ratio in the Orion nebula and in 30 Doradus. We also derive the O/H and the Fe/O ratios in the extremely metal poor galaxy SBS 0335-052.
Antonio Peimbert, Bastin, Cannon, Carigi, Carigi, Carigi, Esteban, Esteban, Esteban, Fadeyev, García-Rojas, García-Rojas, Garnett, Izotov, Izotov, Izotov, Izotov, Jenkins, Luridiana, López-Sánchez, Manuel Peimbert, Ossenkopf, Pagel, Pagel, Peimbert, Peimbert, Peimbert, Peimbert, Peimbert, Peimbert, Peimbert, Peimbert, Przybilla, Rodríguez, Ruiz, Storey, Storey, Thuan   +37 more
core   +1 more source

The Stellar Content of Obscured Galactic Giant H II Regions [PDF]

, 1998
Near infrared images of the Galactic giant HII region W43 reveal a dense stellar cluster at its center. Broad band JHK photometry of the young cluster and K-band spectra of three of its bright stars are presented.
A. Damineli, Cotera A., Crowther P. A., Eenens P. R. J., Koornneef J., Olivia E., P. S. Conti, R. D. Blum, Smith L. F., Subrahmanyan R.   +9 more
core   +2 more sources

An Adaptive Management Model for Brown Bears in Hokkaido: Based on Total Population and the Number of Nuisance Bears

Population Ecology, EarlyView.
Bear management changes management actions according to the horizontal axis of the population size and the vertical axis of the number of nuisance bears. Aiming for the target population size of Ntar, Actions I and II protect the bears, and Action IV reduces the population.
Hiroyuki Matsuda, Akira Maki, Tsutomu Mano, Hifumi Tsuruga, Hino Takafumi, Shinichi Horino   +5 more
wiley   +1 more source

Quasar H II Regions During Cosmic Reionization [PDF]

, 2007
Cosmic reionization progresses as HII regions form around sources of ionizing radiation. Their average size grows continuously until they percolate and complete reionization.
Abel, Tom, Alvarez, Marcelo A.
core   +5 more sources

Speciation Through the Lens of Population Dynamics: A Theoretical Primer on How Small and Large Populations Diverge

Population Ecology, EarlyView.
Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi, Hidaka Kubo, Tokuya Ogawa, Hayate Omura   +3 more
wiley   +1 more source

Evolutionary interplay between viruses and R‐loops

FEBS Letters, EarlyView.
Viruses interact with specialized nucleic acid structures called R‐loops to influence host transcription, epigenetic states, latency, and immune evasion. This Perspective examines the roles of R‐loops in viral replication, integration, and silencing, and how viruses co‐opt or avoid these structures.
Zsolt Karányi, Zita Képes, Zoltán Szabó, Eszter Csoma, Lóránt Székvölgyi   +4 more
wiley   +1 more source

WHAM Observations of H-Alpha, [S II], and [N II] toward the Orion and Perseus Arms: Probing the Physical Conditions of the Warm Ionized Medium [PDF]

, 1999
A large portion of the Galaxy (l = 123 deg to 164 deg, b = -6 deg to -35 deg), which samples regions of the Local (Orion) spiral arm and the more distant Perseus arm, has been mapped with the Wisconsin H-Alpha Mapper (WHAM) in the H-Alpha, [S II] 6716 ...
Golla G., L. M. Haffner, Otte B., Percival J. W., R. J. Reynolds, Reynolds R. J., Reynolds R. J., S. L. Tufte   +7 more
core   +4 more sources

The epithelial barrier theory proposes a comprehensive explanation for the origins of allergic and other chronic noncommunicable diseases

FEBS Letters, EarlyView.
Exposure to common noxious agents (1), including allergens, pollutants, and micro‐nanoplastics, can cause epithelial barrier damage (2) in our body's protective linings. This may trigger an immune response to our microbiome (3). The epithelial barrier theory explains how this process can lead to chronic noncommunicable diseases (4) affecting organs ...
Can Zeyneloglu, Huseyn Babayev, Ismail Ogulur, Sena Ardicli, Yagiz Pat, Duygu Yazici, Bingjie Zhao, Lihong Chang, Xiaoqing Liu, Paolo D'Avino, Manru Li, Ceren Biçer, Fatma Hacer Kurtoğlu Babayev, Raja Dhir, Kari C. Nadeau, Marie‐Charlotte Brüggen, Mubeccel Akdis, Cezmi A. Akdis   +17 more
wiley   +1 more source

ERBIN limits epithelial cell plasticity via suppression of TGF‐β signaling

FEBS Letters, EarlyView.
In breast and lung cancer patients, low ERBIN expression correlates with poor clinical outcomes. Here, we show that ERBIN inhibits TGF‐β‐induced epithelial‐to‐mesenchymal transition in NMuMG breast and A549 lung adenocarcinoma cell lines. ERBIN suppresses TGF‐β/SMAD signaling and reduces TGF‐β‐induced ERK phosphorylation.
Chao Li, Gerard van der Zon, Peter ten Dijke, Tong Shen   +3 more
wiley   +1 more source