Results 41 to 50 of about 1,466,277 (352)

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Dynamic X-ray speckle-tracking imaging with high-accuracy phase retrieval based on deep learning

IUCrJ
Speckle-tracking X-ray imaging is an attractive candidate for dynamic X-ray imaging owing to its flexible setup and simultaneous yields of phase, transmission and scattering images.
Fucheng Yu, Kang Du, Xiaolu Ju, Feixiang Wang, Ke Li, Can Chen, Guohao Du, Biao Deng, Honglan Xie, Tiqiao Xiao   +9 more
doaj   +1 more source

Application of X-Ray Powder Diffraction for Analysis of Selected Dietary Supplements Containing Magnesium and Calcium

Frontiers in Chemistry, 2020
It is estimated that ~50% of medications and dietary supplements offered in the Internet are counterfeit. X-ray diffraction is one of the techniques which may be successfully applied to identify various chemical compounds in polycrystalline mixtures such
Izabela Jendrzejewska
doaj   +1 more source

Absolute timing of the Crab pulsar with the INTEGRAL/SPI telescope

, 2009
We have investigated the pulse shape evolution of the Crab pulsar emission in the hard X-ray domain of the electromagnetic spectrum. In particular, we have studied the alignment of the Crab pulsar phase profiles measured in the hard X-rays and in other ...
Jourdain, E., Molkov, S., Roques, J. P.
core   +1 more source

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Detection of X-ray periodicity from a new eclipsing polar candidate XGPS-I J183251-100106

, 2012
We report the results from a detailed analysis of an archival XMM-Newton observation of the X-ray source XGPS-I J183251-100106, which has been suggested as a promising magnetic cataclysmic variable candidate based on its optical properties.
Chou, Y., Hu, C. P., Hui, C. Y., Lin, L. C. C., Seo, K. A.   +4 more
core   +1 more source

Energy Release During Slow Long Duration Flares Observed by RHESSI [PDF]

, 2011
Slow Long Duration Events (SLDEs) are flares characterized by long duration of rising phase. In many such cases impulsive phase is weak with lack of typical short-lasting pulses. Instead of that smooth, long-lasting Hard X-ray (HXR) emission is observed.
B. Joshi, B.N. Handy, D.E. McKenzie, D.E. McKenzie, G.J. Hurford, H. Isobe, H. Li, H.S. Hudson, H.S. Hudson, H.S. Hudson, H.S. Hudson, J. Jakimiec, J.-P. Delaboudinière, K.J.H. Phillips, K.J.H. Phillips, K.P. Dere, L.K. Harra-Murnion, M. Tomczak, M.J. Aschwanden, N.R. Sheeley Jr., P.T. Gallagher, R.C. Puetter, R.P. Lin, S. Kahler, S. Kołomański, S. Kołomański, S. Kołomański, S. Kołomański, S. Tsuneta, S. Tsuneta, S.M. Hill, T. Kosugi, T. Mrozek, U. Ba̧k-Stȩślicka, U. Ba̧k-Stȩślicka, U. Feldman, Y.W. Jiang   +36 more
core   +2 more sources

Cell wall target fragment discovery using a low‐cost, minimal fragment library

FEBS Letters, EarlyView.
LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan, Mathew Stanley, Olawale Raimi, Andrew T. Ferenbach, Helge C Dorfmueller, Daan M. F. van Aalten   +5 more
wiley   +1 more source

Swift X-Ray Observations of Classical Novae. II. The Super Soft Source sample

, 2011
The Swift GRB satellite is an excellent facility for studying novae. Its rapid response time and sensitive X-ray detector provides an unparalleled opportunity to investigate the previously poorly sampled evolution of novae in the X-ray regime. This paper
A. P. Beardmore, Anupama, Anupama, Ayani, Ayani, Ayani, Baklanov, Balman, Balman, Balman, Beardmore, Bode, Bode, Bode, Bode, Bode, Bode, Bos, Boyd, Bruch, Buil, Camilleri, Charles E. Woodward, Chochol, Chochol, Cragg, Czart, della Valle, Diaz, Drake, Drake, Drake, Duerbeck, Duerbeck, Evans, Evans, Ferri, Frederick M. Walter, Fujii, Gilmore, Greg J. Schwarz, Hachisu, Hachisu, Hachisu, Hanzl, Helton, Helton, Helton, Helton, Hernanz, Hernanz, Hernanz, Hirosawa, Hounsell, Iijima, Iijima, J. P. Osborne, Jan-Uwe Ness, Jeremy J. Drake, K. L. Page, Kang, Kato, Kato, Kato, Kato, Kiss, Kiss, Krauss Hartman, Krautter, Krautter, L. Andrew Helton, Lane, Lee, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Lyke, Lynch, Lynch, Lynch, Lynch, Lynch, Lynch, Lynch, Mason, Mazuk, Mazuk, Mike Bode, Munari, Munari, Munari, Munari, Munari, Munari, Munari, Munari, Naito, Naito, Naito, Naito, Naito, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nelson, Nelson, Nelson, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Nishimura, Nishiyama, O'Brien, O'Brien, O'Brien, Orio, Orio, Osborne, Osborne, Osborne, P. A. Evans, Pagnotta, Pereira, Perry, Pigulski, Pojmanski, Pojmanski, Pojmanski, Pojmanski, Pojmanski, Prieto, Puetter, Rafanelli, Ragan, Rauch, Reinsch, Retter, Ribeiro, Rudy, Rudy, Rudy, Rudy, Rudy, Rudy, Rudy, Russell, Russell, Russell, Russell, Russell, Russell, Russell, Sadakane, Saizar, Sala, Samus, Schaefer, Schaefer, Schlegel, Schlegel, Schlegel, Schwarz, Schwarz, Schwarz, Schwarz, Schwarz, Schwarz, Shafter, Shara, Shore, Shore, Shore, Sitko, Siviero, Siviero, Snijders, Soma, Sostero, Starrfield, Starrfield, Starrfield, Stickland, Stringfellow, Strope, Sugano, Sumner Starrfield, Suzuki, Swierczynski, Takamizawa, Terada, Tomov, Tomov, Tsujimoto, van den Bergh, Vanlandingham, Vanlandingham, Vanlandingham, Vaytet, Waagen, Waagen, Wagner, Walder, Walter, Warner, Whitelock, Williams, Yamaoka, Yamaoka, Yaron   +235 more
core   +1 more source

Probing the outer edge of an accretion disk : a Her X-1 turn-on observed with RXTE [PDF]

, 2005
We present the analysis of Rossi X-ray Timing Explorer (RXTE) observations of the turn-on phase of a 35 day cycle of the X-ray binary Her X-1. During the early phases of the turn-on, the energy spectrum is composed of X-rays scattered into the line of ...
Bai, Becker, Boyd, Brainerd, Burwitz, Cheng, Coburn, Dal Fiume, Davison, Deeter, Giacconi, Gruber, J. Wilms, K. A. Postnov, Kaastra, Katz, Kuster, Kylafis, Leahy, Lightman, M. Kuster, Maloney, Miller, N. I. Shakura, Nowak, Oosterbroek, Parmar, Parmar, Parmar, R. E. Rothschild, R. Staubert, Schandl, Schandl, Scott, Scott, Shakura, Shakura, Tananbaum, Trümper, Verner, Vrtilek, Vrtilek, W. A. Heindl, Wilms, Wilms   +44 more
core   +2 more sources