Results 101 to 110 of about 650,097 (307)

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

open access: yesFEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani   +4 more
wiley   +1 more source

Combinatorial problems of (quasi-)crystallography

open access: yes, 2002
Several combinatorial problems of (quasi-)crystallography are reviewed with special emphasis on a unified approach, valid for both crystals and quasicrystals. In particular, we consider planar sublattices, similarity sublattices, coincidence sublattices,
Baake, Michael, Grimm, Uwe
core   +3 more sources

Solving the Paradox of Multiple IRR\'s in Engineering Economic Problems by Choosing an Optimal -cut

open access: yesInternational Journal of Industrial Engineering and Production Research, 2012
Until now single values of IRR are traditionally used to estimate the time value of cash flows. Since uncertainty exists in estimating cost data, the resulting decision may not be reliable.
B. Moradi   +2 more
doaj  

Validating Journal Cancellation Decisions in the Sciences: A Report Card

open access: yesIssues in Science and Technology Librarianship, 1998
Few libraries have remained unaffected by the serials pricing crisis of the past several years. The University of California, Santa Barbara (UCSB) Library has conducted five serials cancellations projects since 1987 -- 1987, 1989, 1991, 1994, and 1996 ...
Andrea L. (Andrea Louise) Duda   +1 more
doaj   +1 more source

The role of histone modifications in transcription regulation upon DNA damage

open access: yesFEBS Letters, EarlyView.
This review discusses the critical role of histone modifications in regulating gene expression during the DNA damage response (DDR). By modulating chromatin structure and recruiting repair factors, these post‐translational modifications fine‐tune transcriptional programmes to maintain genomic stability.
Angelina Job Kolady, Siyao Wang
wiley   +1 more source

Hydrodynamic Numerical Simulation of the Sipaikou Reach of the Yellow River in Ningxia Based on MIKE 3

open access: yesRenmin Zhujiang, 2020
In order to study the flow of the 4.530 km reach under the influence of the spur dikesafter the Sipaikoureach of the Yellow River in Ningxia runs under the “curve cut-off” project,and provide decision-making references and suggestions for the safe and ...
LIU Xin   +4 more
doaj  

Mechanisms of parasite‐mediated disruption of brain vessels

open access: yesFEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira   +3 more
wiley   +1 more source

Periodic diffraction patterns for 1D quasicrystals

open access: yes, 2005
A simple model of 1D structure based on a Fibonacci sequence with variable atomic spacings is proposed. The model allows for observation of the continuous transition between periodic and non-periodic diffraction patterns.
Buczek, Pawel   +2 more
core   +1 more source

Characterizations of model sets by dynamical systems

open access: yes, 2007
It is shown how regular model sets can be characterized in terms of regularity properties of their associated dynamical systems. The proof proceeds in two steps.
Baake, Michael   +2 more
core   +2 more sources

Time after time – circadian clocks through the lens of oscillator theory

open access: yesFEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo   +2 more
wiley   +1 more source

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