keyword
MENU ▼
Read by QxMD icon Read
search

free-running

keyword
https://www.readbyqxmd.com/read/29444635/diel-pattern-of-circadian-clock-and-storage-protein-gene-expression-in-leaves-and-during-seed-filling-in-cowpea-vigna-unguiculata
#1
Julia Weiss, Marta I Terry, Marina Martos-Fuentes, Lisa Letourneux, Victoria Ruiz-Hernández, Juan A Fernández, Marcos Egea-Cortines
BACKGROUND: Cowpea (Vigna unguiculata) is an important source of protein supply for animal and human nutrition. The major storage globulins VICILIN and LEGUMIN (LEG) are synthesized from several genes including LEGA, LEGB, LEGJ and CVC (CONVICILIN). The current hypothesis is that the plant circadian core clock genes are conserved in a wide array of species and that primary metabolism is to a large extent controlled by the plant circadian clock. Our aim was to investigate a possible link between gene expression of storage proteins and the circadian clock...
February 14, 2018: BMC Plant Biology
https://www.readbyqxmd.com/read/29401914/wavelength-diversification-of-high-power-external-cavity-diamond-raman-lasers-using-intracavity-harmonic-generation
#2
Hadiya Jasbeer, Robert J Williams, Ondrej Kitzler, Aaron McKay, Richard P Mildren
We report a high power quasi-continuous-wave (QCW) 620 nm laser from an external cavity diamond Raman laser utilizing intracavity frequency doubling in lithium triborate. Output power of 30 W for durations of 0.25 ms at 15% conversion efficiency was achieved with a beam quality factor M2 = 1.1 from a free-running Nd:YAG pump laser of M2 = 1.5. The critical design parameters that affect conversion efficiency and power were analysed with the aid of an analytical model. By adaptation to other pump technologies, the diamond approach provides a novel pathway towards high brightness CW beam generation in the visible and ultraviolet regions...
January 22, 2018: Optics Express
https://www.readbyqxmd.com/read/29401875/beat-note-stabilization-in-dual-polarization-dfb-fiber-lasers-by-an-optical-phase-locked-loop
#3
M Guionie, L Frein, A Carré, G Loas, F Bondu, E Pinsard, L Lablonde, B Cadier, M Alouini, M Romanelli, M Vallet, M Brunel
A fully fibered microwave-optical source at 1.5 µm is studied experimentally. It is shown that the beat note between two orthogonally polarized modes of a distributed-feedback fiber laser can be efficiently stabilized using an optical phase-locked loop. The pump-power-induced birefringence serves as the actuator. Beat notes at 1 GHz and 10 GHz are successfully stabilized to a reference synthesizer, passing from the 3 kHz free-running linewidth to a stabilized sub-Hz linewidth, with a phase noise as low as -75 dBc/Hz at 100 Hz offset from the carrier...
February 5, 2018: Optics Express
https://www.readbyqxmd.com/read/29380480/recommendations-for-pharmacological-clinical-trials-in-children-with-functional-constipation-the-rome-foundation-pediatric-subcommittee-on-clinical-trials
#4
REVIEW
I J N Koppen, M Saps, J V Lavigne, S Nurko, J A J M Taminiau, C Di Lorenzo, M A Benninga
BACKGROUND: Evidence for the efficacy of commonly used drugs in the treatment of childhood functional constipation (FC) is scarce, studies are often of low quality and study designs are heterogeneous. Thus, recommendations for the design of clinical trials in childhood FC are needed. PURPOSE: Members of the Rome Foundation and a member of the Pediatric Committee of the European Medicines Agency formed a committee to create recommendations for the design of clinical trials in children with FC...
January 30, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29373644/control-of-plant-leaf-movements-by-the-lunisolar-tidal-force
#5
Joachim Fisahn
Background: Investigations into the diurnal ascent and descent of leaves of beans and other species, as well as experimental interventions into these movements, such as exposures to light at different times during the movement cycle, led to the concept of an endogenous 'clock' as a regulator of these oscillations. The causal origin of leaf movement can be traced to processes that modulate cell volume in target tissues of the pulvinus and petiole. However, these elements of the leaf-movement process do not sufficiently account for the rhythms that are generated following germination in constant light or dark conditions, or when plants are transferred to similar free-running conditions...
January 24, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29373629/are-there-tides-within-trees
#6
Joachim Fisahn
Background: Tree stem diameters and electrical stem potentials exhibit rhythmic variations with periodicities of 24-25 h. Under free-running conditions of constant light or darkness these rhythms were suggested to be mediated by the lunisolar gravitational force. Scope: To further unravel the regulation of tree stem diameter dilatations, many of the published time courses of diameter variations were re-evaluated in conjunction with the contemporaneous time courses of the lunisolar tidal acceleration...
January 24, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29353858/seasonal-changes-in-circulating-gonadal-steroid-levels-and-physiological-evidence-for-the-presence-of-intrinsic-circannual-reproductive-cycles-in-captive-finless-porpoises-neophocaena-asiaeorientalis-from-the-western-inland-sea-japan
#7
Noriko Funasaka, Motoi Yoshioka, Toshiaki Ishibashi, Toshiyuki Tatsukawa, Hideaki Shindo, Koji Takada, Masayuki Nakamura, Tomohiko Iwata, Kaoru Fujimaru, Taira Tanaka
We monitored annual fluctuations of gonadal steroid levels in three sexually mature captive finless porpoises (Neophocaena asiaeorientalis; two males and one female) from two different facilities over 56-91 months. Two animals (one male and one female) were held in an indoor tank with a sunroof (facility A) and the other male was held in an indoor tank without a sunroof (facility B). Water temperatures in both facilities reflected seasonal changes during the study period with a minor difference in the fluctuation pattern...
January 19, 2018: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/29351294/a-had-family-phosphatase-csp-6-regulates-the-circadian-output-pathway-in-neurospora-crassa
#8
Xiaoying Zhou, Bin Wang, Jillian M Emerson, Carol S Ringelberg, Scott A Gerber, Jennifer J Loros, Jay C Dunlap
Circadian clocks are ubiquitous in eukaryotic organisms where they are used to anticipate regularly occurring diurnal and seasonal environmental changes. Nevertheless, little is known regarding pathways connecting the core clock to its output pathways. Here, we report that the HAD family phosphatase CSP-6 is required for overt circadian clock output but not for the core oscillation. The loss of function Δcsp-6 deletion mutant is overtly arrhythmic on race tubes under free running conditions; however, reporter assays confirm that the FREQUENCY-WHITE COLLAR COMPLEX core circadian oscillator is functional, indicating a discrete block between oscillator and output...
January 19, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29339832/clock%C3%AE-19-mutation-modifies-the-manner-of-synchrony-among-oscillation-neurons-in-the-suprachiasmatic-nucleus
#9
Mitsugu Sujino, Takeshi Asakawa, Mamoru Nagano, Satoshi Koinuma, Koh-Hei Masumoto, Yasufumi Shigeyoshi
In mammals, the principal circadian oscillator exists in the hypothalamic suprachiasmatic nucleus (SCN). In the SCN, CLOCK works as an essential component of molecular circadian oscillation, and ClockΔ19 mutant mice show unique characteristics of circadian rhythms such as extended free running periods, amplitude attenuation, and high-magnitude phase-resetting responses. Here we investigated what modifications occur in the spatiotemporal organization of clock gene expression in the SCN of ClockΔ19 mutants...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29338692/emerging-roles-for-microrna-in-the-regulation-of-drosophila-circadian-clock
#10
REVIEW
Yongbo Xue, Yong Zhang
BACKGROUND: The circadian clock, which operates within an approximately 24-h period, is closely linked to the survival and fitness of almost all living organisms. The circadian clock is generated through a negative transcription-translation feedback loop. microRNAs (miRNAs) are small non-coding RNAs comprised of approximately 22 nucleotides that post-transcriptionally regulate target mRNA by either inducing mRNA degradation or inhibiting translation. RESULTS: In recent years, miRNAs have been found to play important roles in the regulation of the circadian clock, especially in Drosophila...
January 16, 2018: BMC Neuroscience
https://www.readbyqxmd.com/read/29328278/controlled-phase-manipulation-module-for-orbital-angular-momentum-photon-states
#11
Fang-Xiang Wang, Juan Wu, Wei Chen, Zhen-Qiang Yin, Shuang Wang, Guang-Can Guo, Zheng-Fu Han
Phase manipulation is essential to quantum information processing, for which the orbital angular momentum (OAM) of photon is a promising high-dimensional resource. Dove prism (DP) is one of the most important elements to realize the nondestructive phase manipulation of OAM photons. DP usually changes the polarization of light and thus increases the manipulation error for a spin-OAM hybrid state. DP in a Sagnac interferometer also introduces a mode-dependent global phase to the OAM mode. In this work, we implemented a high-dimensional controlled-phase manipulation module (PMM), which can compensate the mode-dependent global phase and thus preserve the phase in the spin-OAM hybrid superposition state...
January 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29313181/intraoperative-neurophysiological-monitoring-during-spinal-surgery-technical-review-in-open-and-minimally-invasive-approaches
#12
REVIEW
Fabio Cofano, Francesco Zenga, Marco Mammi, Roberto Altieri, Nicola Marengo, Marco Ajello, Paolo Pacca, Antonio Melcarne, Carola Junemann, Alessandro Ducati, Diego Garbossa
Neurophysiological monitoring is of undoubted value for the intraoperative safety of neurosurgical procedures. Widely developed and used for cranial surgery, it is equally as effective, though perhaps less commonly employed, for spinal pathology. The most frequently used techniques for intraoperative monitoring during spinal surgery include somatosensory evoked potentials (SSEPs), motor evoked potentials (MEPs) and electromyography, which can either be spontaneous free-running (sEMG) or triggered (tEMG). The knowledge of the benefits and limitations of each modality is essential in optimising the value of intraoperative monitoring during spinal procedures...
January 8, 2018: Neurosurgical Review
https://www.readbyqxmd.com/read/29241172/neurophysiological-monitoring-and-awake-craniotomy-for-resection-of-intracranial-gliomas
#13
Taiichi Saito, Manabu Tamura, Mikhail F Chernov, Soko Ikuta, Yoshihiro Muragaki, Takashi Maruyama
Aggressive resection of intracranial gliomas has a positive impact on patients' prognosis, but is associated with a risk of neurological complications. For preservation of brain functions and avoidance of major postoperative morbidity various methods of intraoperative neurophysiological monitoring have been introduced into clinical practice. At present, somatosensory evoked potentials (SSEP), motor evoked potentials (MEP), visual evoked potentials (VEP), brainstem auditory evoked potentials (BAEP), and electrocorticography (ECoG) are used routinely during neurosurgical procedures...
2018: Progress in Neurological Surgery
https://www.readbyqxmd.com/read/29236939/a-proposal-to-explain-how-the-circatidal-rhythm-of-the-arabidopsis-thaliana-root-elongation-rate-could-be-mediated-by-the-lunisolar-gravitational-force-a-quantum-physical-approach
#14
Joachim Fisahn, Peter Barlow, Gerhard Dorda
Background and Aims: Roots of Arabidopsis thaliana exhibit a 24.8 h oscillation of elongation rate when grown under free-running conditions. This growth rhythm is synchronized with the time course of the local lunisolar tidal acceleration. The present study aims at a physiological/physical model to describe the interaction of weak gravitational fields with cellular water dynamics that mediate rhythmic root growth profiles. Methods: Fundamental physical laws are applied to model the water dynamics within single plant cells in an attempt to mimic the 24...
December 10, 2017: Annals of Botany
https://www.readbyqxmd.com/read/29211510/forced-desynchronization-model-for-a-diurnal-primate
#15
Crhistiane A Silva, Laís I M Melo, Alina R Pires, Jordana C Barbalho, Andreia V Melo, Diego A C Fernandes, Everly B Oliveira, Carolina V M Azevedo, Trinitat Cambras, Antoni Díez-Noguera, John Fontenele-Araujo
The circadian system is organized in a hierarchy of multiple oscillators, with the suprachiasmatic nucleus (SCN) as the master oscillator in mammals. The SCN is formed by a group of coupled cell oscillators. Knowledge of this coupling mechanism is essential to understanding entrainment and the expression of circadian rhythms. Some authors suggest that light-dark (LD) cycles with periods near the limit of entrainment may be good models for promoting internal desynchronization, providing knowledge about the coupling mechanism...
December 6, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29204954/chronic-fluoxetine-induces-activity-changes-in-recovery-from-poststroke-anxiety-depression-and-cognitive-impairment
#16
Faranak Vahid-Ansari, Paul R Albert
Poststroke depression (PSD) is a common outcome of stroke that limits recovery and is only partially responsive to chronic antidepressant treatment. In order to elucidate changes in the cortical-limbic circuitry associated with PSD and its treatment, we examined a novel mouse model of persistent PSD. Focal endothelin-1-induced ischemia of the left medial prefrontal cortex (mPFC) in male C57BL6 mice resulted in a chronic anxiety and depression phenotype. Here, we show severe cognitive impairment in spatial learning and memory in the stroke mice...
December 4, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29183256/experimental-and-mathematical-analyses-relating-circadian-period-and-phase-of-entrainment-in-neurospora-crassa
#17
Kwangwon Lee, Prithvi Shiva Kumar, Sean McQuade, Joshua Y Lee, Sohyun Park, Zheming An, Benedetto Piccoli
Circadian rhythms are observed in most organisms on earth and are known to play a major role in successful adaptation to the 24-h cycling environment. Circadian phenotypes are characterized by a free-running period that is observed in constant conditions and an entrained phase that is observed in cyclic conditions. Thus, the relationship between the free-running period and phase of entrainment is of interest. A popular simple rule has been that the entrained phase is the expression of the period in a cycling environment (i...
November 1, 2017: Journal of Biological Rhythms
https://www.readbyqxmd.com/read/29173429/intraoperative-neurophysiologic-monitoring-for-degenerative-cervical-myelopathy
#18
REVIEW
Masaaki Takeda, Satoshi Yamaguchi, Takafumi Mitsuhara, Masaru Abiko, Kaoru Kurisu
Multimodal intraoperative neurophysiologic monitoring is a reliable tool for detecting intraoperative spine injury and is recommended during surgery for degenerative cervical myopathy (DCM). Somatosensory evoked potential (SEP) can be used to monitor spine and peripheral nerve injury during positioning in surgery for DCM. Compensation technique for transcranial evoked muscle action potentials (tcMEPs) should be adopted in intraoperative monitoring during surgery for DCM. Free-running electromyography is a useful real-time monitoring add-on modality in addition to SEP and tcMEP...
January 2018: Neurosurgery Clinics of North America
https://www.readbyqxmd.com/read/29170483/free-running-sn-precipitates-an-efficient-phase-separation-mechanism-for-metastable-ge1-xsnx-epilayers
#19
Heiko Groiss, Martin Glaser, Magdalena Schatzl, Moritz Brehm, Dagmar Gerthsen, Dietmar Roth, Peter Bauer, Friedrich Schäffler
The revival of interest in Ge1-xSnx alloys with x ≥ 10% is mainly owed to the recent demonstration of optical gain in this group-IV heterosystem. Yet, Ge and Sn are immiscible over about 98% of the composition range, which renders epilayers based on this material system inherently metastable. Here, we address the temperature stability of pseudomorphic Ge1-xSnx films grown by molecular beam epitaxy. Both the growth temperature dependence and the influence of post-growth annealing steps were investigated...
November 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29163208/circadian-alterations-in-a-murine-model-of-hypothalamic-glioma
#20
José M Duhart, Lucila Brocardo, Carlos S Caldart, Luciano Marpegan, Diego A Golombek
The mammalian circadian system is controlled by a central oscillator located in the suprachiasmatic nuclei (SCN) of the hypothalamus, in which glia appears to play a prominent role. Gliomas originate from glial cells and are the primary brain tumors with the highest incidence and mortality. Optic pathway/hypothalamic gliomas account for 4-7% of all pediatric intracranial tumors. Given the anatomical location, which compromises both the circadian pacemaker and its photic input pathway, we decided to study whether the presence of gliomas in the hypothalamic region could alter circadian behavioral outputs...
2017: Frontiers in Physiology
keyword
keyword
19614
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"