Results 31 to 40 of about 4,787 (279)

Properties of Rb CPT Atomic Clock at Subharmonic Microwave Modulation Frequencies

IEEE Photonics Journal, 2019
This letter presents for the first time a systematic study of an atomic frequency standard based on сoherent population trapping (CPT) effect in 87Rb vapour optically pumped with a multifrequency laser radiation formed with sidebands of a single ...
Daba Radnatarov, Sergey Kobtsev, Valerii Andryushkov, Sergey Khripunov, Evgenii Baklanov, Arkadii Yakovlev   +5 more
doaj   +1 more source

Investigations of laser pumped gas cell atomic frequency standard [PDF]

, 1982
The performance characteristics of a rubidium gas cell atomic frequency standard might be improved by replacing the standard rubidium discharge lamp with a single mode laser diode. Aspects of the laser pumped gas cell atomic clock studied include effects
Camparo, J. C., Fueholz, R. P., Volk, C. H.   +2 more
core   +1 more source

Cytoplasmic p21 promotes stemness of colon cancer cells via activation of the NFκB pathway

Molecular Oncology, EarlyView.
Cytoplasmic p21 promotes colorectal cancer stem cell (CSC) features by destabilizing the NFκB–IκB complex, activating NFκB signaling, and upregulating BCL‐xL and COX2. In contrast to nuclear p21, cytoplasmic p21 enhances spheroid formation and stemness transcription factor CD133.
Arnatchai Maiuthed, Kerstin Huebner, Katharina Erlenbach‐Wuensch, Chuanpit Hampel, Daniela Thalheim, Adriana Vial‐Roehe, Bodee Nutho, Susanne Merkel, Arndt Hartmann, Pithi Chanvorachote, Regine Schneider‐Stock   +10 more
wiley   +1 more source

Algorithm for Taming Rubidium Atomic Clocks Based on Longwave (Loran-C) Timing Signals

Remote Sensing
This paper explores effective methods for taming rubidium atomic clocks with longwave timing signals. In an in-depth analysis of the time-difference data between the 1PPS timing signal output from the ground-wave signal received by a long-wave receiver ...
Xiaolong Guan, Jianfeng Wu, Zhibo Zhou, Yan Xing, Yuji Li, Huabing Wu, Aiping Zhao   +6 more
doaj   +1 more source

Electronic system for drift clock calculation and synchronization for seafloor observatory [PDF]

, 2016
The paper describes a new electronic device that allows an easily measurement of the drift between a reference time source (usually GPS) and an atomic rubidium clock which is normally used in seafloor observatories.
Apponi, Umberto, Embriaco, Davide, Marinaro, Giuditta, Romano, Vincenzo   +3 more
core  

Coherent manipulation of atomic qubits in optical micropotentials [PDF]

, 2007
We experimentally demonstrate the coherent manipulation of atomic states in far-detuned dipole traps and registers of dipole traps based on two-dimensional arrays of microlenses.
A. Kaplan, A. Lengwenus, C. Klempt, E.L. Hahn, F. Bloch, F.B.J. Buchkremer, G. Birkl, G. Birkl, G. Grynberg, H. Katori, I. Deutsch, J. Kruse, M. Volk, M.A. Nielsen, M.F. Andersen, N. Davidson, N. Schlosser, N.A. Kurnit, N.F. Ramsey, P. Treutlein, P.S. Jessen, R. Dumke, R. Ozeri, S. Kuhr, W. Ertmer   +24 more
core   +2 more sources

Phenotypic and genotypic characterization of single circulating tumor cells in the follow‐up of high‐grade serous ovarian cancer

Molecular Oncology, EarlyView.
Single circulating tumor cells (sCTCs) from high‐grade serous ovarian cancer patients were enriched, imaged, and genomically profiled using WGA and NGS at different time points during treatment. sCTCs revealed enrichment of alterations in Chromosomes 2, 7, and 12 as well as persistent or emerging oncogenic CNAs, supporting sCTC identity.
Carolin Salmon, Rui P. L. Neves, Nikolas H. Stoecklein, Sven‐Thorsten Liffers, Jens Siveke, Jan D. Kuhlmann, Pauline Wimberger, Paul Buderath, Rainer Kimmig, Sabine Kasimir‐Bauer   +9 more
wiley   +1 more source

Overview of molecular signatures of senescence and associated resources: pros and cons

FEBS Open Bio, EarlyView.
Cells can enter a stress response state termed cellular senescence that is involved in various diseases and aging. Detecting these cells is challenging due to the lack of universal biomarkers. This review presents the current state of senescence identification, from biomarkers to molecular signatures, compares tools and approaches, and highlights ...
Orestis A. Ntintas, Sylvia Vagena, Pavlos Pantelis, Giorgos Theocharous, Russel Petty, Konstantinos Evangelou, Vassilis G. Gorgoulis   +6 more
wiley   +1 more source

Effect of shield magnetization on variations in the frequency of onboard rubidium atomic clocks

St. Petersburg Polytechnical University Journal: Physics and Mathematics
In the paper, the results of a study of the influence of the magnetic shield magnetization on the relative frequency instability of small-sized rubidium atomic clocks have been presented.
Ermak Sergey, Semenov Vladimir, Baranov Alexey, Rogatin Maxim, Sergeeva Maria   +4 more
doaj   +1 more source

The role of lipid metabolism in neuronal senescence

FEBS Open Bio, EarlyView.
Disrupted lipid metabolism, through alterations in lipid species or lipid droplet accumulation, can drive neuronal senescence. However, lipid dyshomeostasis can also occur alongside neuronal senescence, further amplifying tissue damage. Delineating how lipid‐induced senescence emerges in neurons and glial cells, and how it contributes to ageing and ...
Dikaia Tsagkari, Eleftheria Panagiotidou, Nektarios Tavernarakis   +2 more
wiley   +1 more source