Results 111 to 120 of about 4,605,994 (345)

Reddening and extinction towards H II regions [PDF]

The light emitted by the gas in H II regions is attenuated by dust. This extinction can be measured by comparing H alpha, H beta, and radio continuum fluxes, since the intrinsic ratios of the Balmer line and thermal radio continuum emissivities are ...
Caplan, James, Deharveng, Lise
core   +1 more source

4‐nitrobenzoate inhibits 4‐hydroxybenzoate polyprenyltransferase in malaria parasites and enhances atovaquone efficacy

FEBS Letters, EarlyView.
Atovaquone is an antimalarial requiring potentiation for sufficient efficacy. We pursued strategies to enhance its activity, showing that 4‐nitrobenzoate inhibits 4‐hydroxybenzoate polyprenyltransferase, decreasing ubiquinone biosynthesis. Since atovaquone competes with ubiquinol in mitochondria, 4‐nitrobenzoate facilitates its action, potentiating ...
Ignasi Bofill Verdaguer, Matheus Felipe Santos, Maurício Mazzine Filho, Gabriela Oliveira Castro, Agustín Hernández, Manoel Aparecido Peres, Alejandro Miguel Katzin, Marcell Crispim   +7 more
wiley   +1 more source

Infrared emission from ultracompact H II regions [PDF]

Models of circumstellar dust shells around ultracompact (UC) H II regions were constructed that accurately fit the observed IR flux distributions. The models assume spherically symmetric dust shells illuminated by stars whose bolometric luminosity is ...
Churchwell, ED, Wolfire, Mark G., Wood, Douglas O. S.   +2 more
core   +1 more source

Uniform Infall toward the Cometary H II Region in the G34.26+0.15 Complex?

, 2013
Gas accretion is a key process in star formation. However, the gas infall detections in high-mass star forming regions with high-spatial resolution observations are rare. Here we report the detection of gas infall towards a cometary ultracompact H{\sc ii}
Liu, Tie, Wu, Yuefang, Zhang, Huawei
core   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Spitzer observations of extragalactic H II regions - III. NGC 6822 and the hot star, H II region connection

, 2016
Using the short-high module of the Infrared Spectrograph on the Spitzer Space Telescope, we have measured the [S IV] 10.51, [Ne II] 12.81, [Ne III] 15.56, and [S III] 18.71-micron emission lines in nine H II regions in the dwarf irregular galaxy NGC 6822.
Colgan, Sean W. J., Dufour, Reginald J., Kader, Justin, McNabb, Ian A., Pauldrach, Adalbert W. A., Rubin, Robert H., Simpson, Janet P., Weber, Johann A.   +7 more
core   +2 more sources

Photosynthesis under far‐red light—evolutionary adaptations and bioengineering of light‐harvesting complexes

FEBS Letters, EarlyView.
Phototrophs evolved light‐harvesting systems adapted for efficient photon capture in habitats enriched in far‐red radiation. A subset of eukaryotic pigment‐binding proteins can absorb far‐red photons via low‐energy chlorophyll states known as red forms.
Antonello Amelii, Edoardo Andrea Cutolo, Daniele Montepietra, Claudia Battarra, Roberto Caferri, Stefano Capaldi, Zeno Guardini, Luca Dall'Osto, Roberto Bassi   +8 more
wiley   +1 more source

Detection of Diffuse Hot Gas around the Young, Potential Superstar Cluster H72.97–69.39

The Astrophysical Journal
We present the first Chandra X-ray observations of H72.97–69.39, a highly embedded, potential superstar cluster in its infancy located in the star-forming complex N79 of the Large Magellanic Cloud. We detect particularly hard, diffuse X-ray emission that
Trinity L. Webb, Jennifer A. Rodriguez, Laura A. Lopez, Anna L. Rosen, Lachlan Lancaster, Omnarayani Nayak, Anna F. McLeod, Paarmita Pandey, Grace M. Olivier   +8 more
doaj   +1 more source

Spectrophotometric Distances to Galactic H\,{\sc{ii}} Regions

, 2010
We present a near infrared study of the stellar content of 35 H\,{\sc{ii}} regions in the Galactic plane. In this work, we have used the near infrared domain $J-$, $H-$ and $K_{s}-$ band color images to visually inspect the sample.
A. Damineli, A. P. Moisés, Allen, Arias, Arias, Barbosa, Bartkiewicz, Beck, Becklin, Bernasconi, Bica, Bik, Blitz, Blum, Blum, Blum, Blum, Brunthaler, C. L. Barbosa, Carpenter, Chini, Chini, Chini, Choi, Churchwell, Conti, Corbel, Diolaiti, Downes, Dutra, E. Figuerêdo, Fazio, Figer, Figuerêdo, Figuerêdo, Frogel, Furness, Goldader, Goto, Hachisuka, Hachisuka, Hanson, Hanson, Hewett, Hirota, Honma, Humphreys, Hyland, Indebetouw, Jackson, Johnson, Kang, Keto, Kim, Koornneef, Kuchar, Kumar, Kurtz, Kurtz, Leahy, Lester, Massi, Mathis, McClure-Griffiths, McKee, Melena, Menten, Mercer, Messineo, Moellenbrock, Moffat, Moran, Moscadelli, Nishiyama, Nishiyama, P. S. Conti, R. D. Blum, Reid, Reid, Reid, Robrade, Roman-Lopes, Roman-Lopes, Rubin, Russeil, Sato, Sato, Shaver, Skrutskie, Smith, Stead, Stolte, Straižys, Subramaniam, Thompson, Urquhart, Vacca, Ward-Thompson, Ward-Thompson, Wegner, Wilson, Wilson, Wilson, Wood, Xu, Xu, Zhang   +106 more
core   +1 more source

Rad27/FEN1 prevents accumulation of Okazaki fragments and ribosomal DNA copy number changes

FEBS Letters, EarlyView.
The budding yeast Rad27 is a structure‐specific endonuclease. Here, the authors reveal that Rad27 is crucial for maintaining the stability of the ribosomal RNA gene (rDNA) region. Rad27 deficiency leads to the accumulation of Okazaki fragments and changes in rDNA copy number.
Tsugumi Yamaji, Yuko Katayama, Nanase Arata, Mariko Sasaki   +3 more
wiley   +1 more source