Results 41 to 50 of about 1,354,268 (327)

FUNCTIONAL IMPLICATIONS OF THE CLOCK 3111T/C SINGLE-NUCLEOTIDE POLYMORPHISM

open access: yesFrontiers in Psychiatry, 2016
Circadian rhythm disruptions are prominently associated with Bipolar Disorder (BD). Circadian rhythms are regulated by the molecular clock, a family of proteins that function together in a transcriptional-translational feedback loop. The CLOCK protein is
Angela Renee Ozburn   +8 more
doaj   +1 more source

Compensation Method for Sensor Network Clock Error Based on Cyclic Symmetry Algorithm

open access: yesSensors, 2020
Since the existing methods cannot evaluate the time delay of different layers of sensor networks, there are some problems such as the low precision of clock error compensation, high time delay, and low efficiency of communication in sensor networks.
Hailiang Feng   +3 more
doaj   +1 more source

Coherent optical clock down-conversion for microwave frequencies with 10−18 instability [PDF]

open access: yesScience, 2020
Good timing for microwave technology Timing standards around the world define the second using atomic clocks, specifically the microwave frequencies emitted from trapped atoms.
Takuma K. M. Nakamura   +14 more
semanticscholar   +1 more source

The Clock Takes Shape—24 h Dynamics in Genome Topology

open access: yesFrontiers in Cell and Developmental Biology, 2022
Circadian rhythms orchestrate organismal physiology and behavior in order to anticipate daily changes in the environment. Virtually all cells have an internal rhythm that is synchronized every day by Zeitgebers (environmental cues). The synchrony between
Kévin Tartour, Kiran Padmanabhan
doaj   +1 more source

Cell-autonomous clock of astrocytes drives circadian behavior in mammals

open access: yesScience, 2019
Astrocytes can drive the master clock in the brain The neurons of the suprachiasmatic nucleus (SCN) of the hypothalamus function as a central circadian clock, coordinating mammalian physiology with the 24-hour light-dark cycle. Brancaccio et al.
M. Brancaccio   +6 more
semanticscholar   +1 more source

Adaptive dating and fast proposals: Revisiting the phylogenetic relaxed clock model

open access: yesbioRxiv, 2020
Uncorrelated relaxed clock models enable estimation of molecular substitution rates across lineages and are widely used in phylogenetics for dating evolutionary divergence times.
J. Douglas, Rong Zhang, R. Bouckaert
semanticscholar   +1 more source

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

open access: yesFEBS 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

Light exposure during development affects physiology of adults in Drosophila melanogaster

open access: yesFrontiers in Physiology, 2022
Light is one of most important factors synchronizing organisms to day/night cycles in the environment. In Drosophila it is received through compound eyes, Hofbauer-Buchner eyelet, ocelli, using phospholipase C-dependent phototransduction and by deep ...
Milena Damulewicz   +2 more
doaj   +1 more source

System clock estimation based on clock wastage minimization [PDF]

open access: yes, 1991
When synthesizing a hardware implementation from behavioral descriptions, an important decision is the selection of a clock cycle to schedule the datapath operations into control steps.
Gajski, Daniel D., Narayan, Sanjiv
core  

Collisional losses, decoherence, and frequency shifts in optical lattice clocks with bosons

open access: yes, 2009
We have quantified collisional losses, decoherence and the collision shift in a one-dimensional optical lattice clock with bosonic 88Sr. The lattice clock is referenced to the highly forbidden transition 1S0 - 3P0 at 698 nm, which becomes weakly allowed ...
Lisdat, Ch.   +4 more
core   +1 more source

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