Results 71 to 80 of about 1,433,403 (294)

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

Direction-of-Arrival Estimation of Multiple Linear Frequency Modulation Signals Based on Quadratic Time–Frequency Distributions and the Hough Transform

Applied Sciences
The direction-of-arrival (DOA) estimation of multiple linear frequency modulation (LFM) signals typically requires the construction of a spatial time–frequency distribution (STFD) matrix via linear transforms or quadratic time–frequency distributions ...
Gang Wu, Hongji Fang, Zhenguo Ma, Bo Zhang   +3 more
doaj   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Crack detection on beams by time-frequency analysis of transient flexural waves

Archives of Acoustics, 2014
A method for crack detection in beams by time-frequency analysis of flexural waves is described. Two different time-frequency representations, namely the continuous wavelet transform and the smoothed pseudo-Wigner distribution are employed. Simulated and
Anastasia APOSTOLOUDIA, Evanthia DOUKA, Leontios J. HADJILEONTIADIS, Ioannis T. REKANOS, Athanasios TROCHIDIS   +4 more
doaj  

A System-Based Approach to Monitoring the Performance of a Human Neuromusculoskeletal System

International Journal of Prognostics and Health Management, 2016
This paper presents a system-based method for monitoring a human neuromusculoskeletal (NMS) system. It is based on autoregressive models with exogenous inputs, which link surface electromyographic signals and joint kinematic variables in order to detect ...
Marcus Mussleman, Deanna H. Gates, Dragan Djurdjanovic   +2 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

A Class of Highly Concentrated Time-Frequency Distributions Based on the Ambiguity Domain Representation and Complex-Lag Moment

EURASIP Journal on Advances in Signal Processing, 2009
A class of time-frequency distributions with complex-lag argument is proposed. It is based on the ambiguity domain representations of real and complex-lag moment, combined to provide a cross-terms free representation for multicomponent signals ...
Irena Orović, Srdjan Stanković   +1 more
doaj   +1 more source

Stochastic Hysteresis and Resonance in a Kinetic Ising System

, 1998
We study hysteresis for a two-dimensional, spin-1/2, nearest-neighbor, kinetic Ising ferromagnet in an oscillating field, using Monte Carlo simulations and analytical theory.
A. Aharoni, A. Cheng, A. H. Nayfeh, A. J. Bard, A. R. Bulsara, A. R. Bulsara, A. Visintin, C. C. A. Günther, C. Luse, C. P. Steinmetz, D. Cox, D. Dhar, F. Marchesoni, H. L. Richards, H. L. Richards, H. L. Richards, H. Orihara, I. D. Mayergoyz, I. Lifshitz, J. F. Lindner, J. F. Lindner, J. Gunton, J. J. Brey, J. Lee, J. S. Langer, J. S. Langer, K. Binder, K. Sekimoto, L. Gammaitoni, M. A. Novotny, M. Acharyya, M. Acharyya, M. Acharyya, M. Acharyya, M. Acharyya, M. Acharyya, M. Acharyya, M. Acharyya, M. Brokate, M. C. Mahato, M. C. Mahato, M. Kolesik, M. Lederman, M. Lederman, M. Lederman, M. Löcher, M. Rao, M. Rao, M. Rao, M. Rao, N. J. Günther, P. A. Martin, P. A. Rikvold, P. A. Rikvold, P. A. Rikvold, P. A. Rikvold, P. A. Rikvold, P. B. Thomas, P. D. Beale, P. Jung, P. Jung, P. Jung, P. M. Gade, Q. Jiang, R. Benzi, R. Benzi, R. Glauber, S. Allen, S. W. Sides, S. W. Sides, S. W. Sides, T. Chang, T. Tomé, T. Zhou, T. Zhou, V. Shneidman, V. Shneidman, W. H. Press, W. Lo, W. Wernsdorfer, Y. He, Y. Ishibashi, Y. Martin, Z. Fan, Z. Néda, Z. Néda   +85 more
core   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source