Results 51 to 60 of about 985,031 (290)

Likely Scenarios of Intron Evolution [PDF]

open access: yes, 2005
Whether common ancestors of eukaryotes and prokaryotes had introns is one of the oldest unanswered questions in molecular evolution. Recently completed genome sequences have been used for comprehensive analyses of exon-intron organization in orthologous genes of diverse organisms, leading to more refined work on intron evolution.
openaire   +1 more source

The role and implications of mammalian cellular circadian entrainment

open access: yesFEBS Letters, EarlyView.
At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley   +1 more source

Particle Physics Models, Topological Defects and Electroweak Baryogenesis

open access: yes, 1994
We demonstrate the viability of electroweak baryogenesis scenarios in which the necessary departure from equilibrium is realized by the evolution of a network of topological defects.
't Hooft   +47 more
core   +1 more source

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

open access: yesFEBS 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   +3 more
wiley   +1 more source

Three Decades of 3GPP Target Cell Search through 3G, 4G, and 5G

open access: yesIEEE Access, 2020
This survey provides the reader with the open literature on the detailed operational scenarios of Target Cell Search (TCS) in both 3G and 4G systems, with a particular emphasis on the DownLink (DL).
Seunghwan Won, Sang Won Choi
doaj   +1 more source

Adaptive grid based multi-objective Cauchy differential evolution for stochastic dynamic economic emission dispatch with wind power uncertainty. [PDF]

open access: yesPLoS ONE, 2017
Since wind power is integrated into the thermal power operation system, dynamic economic emission dispatch (DEED) has become a new challenge due to its uncertain characteristics.
Huifeng Zhang   +4 more
doaj   +1 more source

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

Physical approximations for the nonlinear evolution of perturbations in dark energy scenarios

open access: yes, 2008
The abundance and distribution of collapsed objects such as galaxy clusters will become an important tool to investigate the nature of dark energy and dark matter.
H. Bondi   +9 more
core   +1 more source

A study on wear evaluation of railway wheels based on multibody dynamics and wear computation [PDF]

open access: yes, 2010
The wear evolution of railway wheels is a very important issue in railway engineering. In the past, the reprofiling intervals of railway vehicle steel wheels have been scheduled according to designers' experience.
Ambrosio, J.   +6 more
core   +1 more source

Robotic-assisted kidney transplantation: Technical evolution and applications in complex scenarios

open access: yesCurrent Urology
. Robot-assisted kidney transplantation (RAKT) is a new, minimally invasive option for kidney transplantation with great application prospects. This narrative review aimed to outline the developmental history of RAKT, existing technology, and its ...
Jianchun Cui   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy