Results 11 to 20 of about 1,271 (117)

Chemical constituents and bioactivities of hops (Humulus lupulus L.) and their effects on beer‐related microorganisms

Food and Energy Security, Volume 11, Issue 2, May 2022., 2022
Abstract The female inflorescence of hops is traditionally used in the brewing industry to impart bitterness, aroma, flavour and longer shelf life to beer, where the bittering acids are the main compounds that enhance the quality of the beer. In recent years, a wide variety of bioactive compounds have been reported to be present in female flowers.
Shaokang Sun, Xiaochen Wang, Ai Yuan, Jianlin Liu, Zebin Li, Dongxiao Xie, Huimin Zhang, Wenqing Luo, Hengyuan Xu, Jinshang Liu, Cong Nie, Haojun Zhang   +11 more
wiley   +1 more source

Kepler K2 and TESS Observations of Two Magnetic Cataclysmic Variables: The New Asynchronous Polar SDSS J084617.11+245344.1 and Paloma

The Astronomical Journal, 2023
There have been relatively few published long-duration, uninterrupted light curves of magnetic cataclysmic variable stars in which the accreting white dwarf’s rotational frequency is slightly desynchronized from the binary orbital frequency.
Colin Littlefield, D. W. Hoard, Peter Garnavich, Paula Szkody, Paul A. Mason, Simone Scaringi, Krystian Ilkiewicz, Mark R. Kennedy, Saul A. Rappaport, Rahul Jayaraman   +9 more
doaj   +1 more source

SDSS J134441.83+204408.3: A Highly Asynchronous Short-period Magnetic Cataclysmic Variable with a 56 MG Field Strength

The Astrophysical Journal Letters, 2023
When the accreting white dwarf in a magnetic cataclysmic variable star (mCV) has a field strength in excess of 10 MG, it is expected to synchronize its rotational frequency to the binary orbit frequency, particularly at small binary separations, due to ...
Colin Littlefield, Paul A. Mason, Peter Garnavich, Paula Szkody, John Thorstensen, Simone Scaringi, Krystian Iłkiewicz, Mark R. Kennedy, Natalie Wells   +8 more
doaj   +1 more source

Identification of 1RXS J165424.6-433758 as a Polar Cataclysmic Variable

The Astrophysical Journal, 2023
We present the results of our X-ray, ultraviolet, and optical follow-up campaigns of 1RXS J165424.6-433758, an X-ray source detected with the Swift Deep Galactic Plane Survey.
B. O’Connor, J. Brink, D. A. H. Buckley, K. Mukai, C. Kouveliotou, E. Göğüş, S. B. Potter, P. Woudt, A. Lien, A. Levan, O. Kargaltsev, M. G. Baring, E. Bellm, S. B. Cenko, P. A. Evans, J. Granot, C. Hailey, F. Harrison, D. Hartmann, A. J. van der Horst, D. Huppenkothen, L. Kaper, J. A. Kennea, P. O. Slane, D. Stern, E. Troja, R. A. M. J. Wijers, G. Younes   +27 more
doaj   +1 more source

PTF1J2224+17: A short‐period, high‐field polar

Astronomische Nachrichten, Volume 341, Issue 4, Page 424-429, May 2020., 2020
Abstract We present time‐resolved photometry of the cataclysmic variable PTF1J2224+17 obtained during four nights in October 2018 and January 2019 from Inastars observatory. The object is variable on a period of 103.82 min. Archival Catalina Real‐Time Transient Survey (CRTS), Palomar Transient Factory, and Zwicky Transient Facility‐data show frequent ...
Axel D. Schwope, Bernd D. Thinius
wiley   +1 more source

EUVE J0425.6−5714: A Newly Discovered AM Herculis Star [PDF]

Publications of the Astronomical Society of the Pacific, 1998
We detected a new AM Her star serendipitously in a 25 day observation with the EUVE satellite. A coherent period of 85.82 min is present in the EUVE Deep Survey imager light curve of this source. A spectroscopic identification is made with a 19th magnitude blue star that has H and He emission lines, and broad cyclotron humps typical of a magnetic ...
Halpern, J. P., Leighly, K. M., Marshall, H. L., Eracleous, M., Storchi-Bergmann, T.   +4 more
openaire   +2 more sources

High and low states of the system AM Herculis [PDF]

, 2008
Context: We investigate the distribution of optically high and low states of the system AM Herculis (AM Her). Aims: We determine the state duty cycles, and their relationships with the mass transfer process and binary orbital evolution of the system.
Bailey, Bailey, Beuermann, Bonnet-Bidaud, Buzasi, Campbell, Chanmugam, Chanmugam, Cropper, Edwards, Feigelson, Götz, Hameury, Hessman, Honeycutt, Hudec, Johns-Krull, Joss, K. Wu, King, L. L. Kiss, Latham, Livio, Lubow, Meyer, Papaloizou, Plavec, Ramsay, Schmidt, Silber, Uchida, Wickramasinghe, Wickramasinghe, Wu, Wu, Wu   +35 more
core   +1 more source

UBVRI-polarimetry of the AM Herculis star RX J0203.8+2959 [PDF]

Astronomy & Astrophysics, 2001
We present results of the rst simultaneous UBVRI-photopolarimetric observations of the long period (4.6 hrs) AM Herculis system RX J0203.8+2959. The observed circular polarization shows both negative and positive polarization, from +7% to 5% in the B-band.
Katajainen, S., Scaltriti, F., Piirola, V., Lehto, H. J., Anderlucci, E.   +4 more
openaire   +2 more sources

ORFEUS II Far-UV Spectroscopy of AM Herculis [PDF]

, 1998
Six high-resolution (\lambda/\Delta\lambda ~ 3000) far-UV (\lambda\lambda = 910-1210 \AA) spectra of the magnetic cataclysmic variable AM Herculis were acquired in 1996 November during the flight of the ORFEUS-SPAS II mission.
Beardmore A. P., Christopher W. Mauche, Cropper M., Cropper M., Gansicke B. T., Greeley B. W., Heise J., Hurwitz M., Ishida M., John C. Raymond, Kuijpers J., Southwell K. A., van Teeseling A.   +12 more
core   +2 more sources

Restoration of Florida scrub vegetation in an old field through 23 years after planting

Restoration Ecology, Volume 27, Issue 2, Page 320-332, March 2019., 2019
Florida scrub, a fire‐maintained, xeromorphic shrubland, hosts many rare and declining species, but most scrub habitat has been lost to development and agriculture. Formerly cultivated sites offer an opportunity to restore Florida scrub. In this 23‐year study, we test whether scrub species could be restored to an old field and whether scrub vegetation ...
Paul A. Schmalzer, Tammy E. Foster
wiley   +1 more source