Results 81 to 90 of about 80,890 (284)

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

open access: yesFEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Cryptanalyzing a bit-level image encryption algorithm based on chaotic maps

open access: yesEngineering Science and Technology, an International Journal
Recently, a bit-level image encryption algorithm based on chaotic maps (BCIEA) has been presented. BCIEA consists of diffusion and confusion, and its security performance mainly relies on the dynamic mechanisms introduced during diffusion and confusion ...
Heping Wen, Yiting Lin, Zhaoyang Feng
doaj   +1 more source

Complex networks of earthquakes and aftershocks [PDF]

open access: yesNonlinear Processes in Geophysics, 2005
We invoke a metric to quantify the correlation between any two earthquakes. This provides a simple and straightforward alternative to using space-time windows to detect aftershock sequences and obviates the need to distinguish main shocks from ...
M. Baiesi, M. Baiesi, M. Paczuski
doaj  

Directed evolution of enzymes at the crossroads of tradition and innovation

open access: yesFEBS Open Bio, EarlyView.
An iterative cycle of data‐driven enzyme optimization comprising four stages: genetic diversification of a template enzyme, expression of protein variants, high‐throughput evaluation, and machine‐learning‐guided redesign of the next variant library.
Maria Tomkova   +2 more
wiley   +1 more source

Perception of illusory vowels by Persian speakers in several consonant clusters of French loanwords [PDF]

open access: yesزبان پژوهی
Introduction Previous research has highlighted the challenge listeners face in distinguishing between legitimate and non-native consonant sequences, presenting potential perceptual illusions (Berent, et al., 2007; Dupoux, et al., 1999). Some researchers
Saghar Javidpour   +2 more
doaj   +1 more source

How phagocytic cells kill bacteria: Lessons from a professional killer

open access: yesFEBS Open Bio, EarlyView.
How phagocytic cells ingest and kill bacteria has been studied for more than a century, but many questions remain unanswered. The study of the amoeba Dictyostelium discoideum brings new answers, and new questions. Professional phagocytic cells such as neutrophils and macrophages, as well as free‐living soil amoebae like Dictyostelium discoideum, employ
Otmane Lamrabet, Pierre Cosson
wiley   +1 more source

Loss of AMBRA1 activates MAPK and angiogenesis signaling pathways in melanoma cells

open access: yesFEBS Open Bio, EarlyView.
Loss of AMBRA1 in melanoma cells activates multiple oncogenic pathways associated with tumor progression. Transcriptomic and protein network analyses revealed that AMBRA1 depletion enhances MAPK/ERK signaling, angiogenesis, TGF‐β/EMT signaling, and Wnt/axon guidance pathways.
Milad Ibrahim   +4 more
wiley   +1 more source

MagmaFlow: A desktop platform for artificial intelligence‐driven expression analysis

open access: yesFEBS Open Bio, EarlyView.
MagmaFlow is a free, no‐code platform for gene expression analysis. It generates interactive volcano plots, links genes to literature, pathways, and diseases, prioritizes candidates using millions of publications, identifies affected biological processes, builds network diagrams, and exports publication‐ready figures and reports for macOS and Windows ...
Carlos E. Buss   +7 more
wiley   +1 more source

Gao’s conjecture on zerosum sequences

open access: yesProceedings Mathematical Sciences, 2002
The authors investigate questions related to the Kemnitz Conjecture asserting the existence of a \(p\)-subsequence summing to \(0\) from any \((4p-3)\)-sequence of elements of the finite field of order \(p^2\).
Sury, B., Thangadurai, R.
openaire   +2 more sources

Testing for zero-modification in count regression models [PDF]

open access: yes, 2006
Count data often exhibit overdispersion and/or require an adjustment for zero outcomes with respect to a Poisson model. Zero-modified Poisson (ZMP) and zero-modified generalized Poisson (ZMGP) regression models are useful classes of models for such ...
Min, Aleksey, Czado, Claudia
core   +1 more source

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