Results 41 to 50 of about 58,777 (326)
The heart, a secondary organ in the control of blood circulation
Experimental Physiology, EarlyView., 2023 Abstract Circulation of the blood is a fundamental physiological function traditionally ascribed to the pressure‐generating function of the heart. However, over the past century the ‘cardiocentric’ view has been challenged by August Krogh, Ernst Starling, Arthur Guyton and others, based on haemodynamic data obtained from isolated heart preparations and
Branko Furst, José González‐Alonso
wiley +1 more source
Flow-enhanced priming of hESCs through H2B acetylation and chromatin decondensation
Stem Cell Research & Therapy, 2019 Background Distinct mechanical stimuli are known to manipulate the behaviors of embryonic stem cells (ESCs). Fundamental rationale of how ESCs respond to mechanical forces and the potential biological effects remain elusive.
Jiawen Wang +7 more
doaj +1 more source
Asymptotic symmetries of Yang-Mills fields in Hamiltonian formulation
Journal of High Energy Physics, 2020 We investigate the asymptotic symmetry group of the free SU(N )-Yang-Mills theory using the Hamiltonian formalism. We closely follow the strategy of Henneaux and Troessaert who successfully applied the Hamiltonian formalism to the case of gravity and ...
Roberto Tanzi, Domenico Giulini
doaj +1 more source
Sessile drops in microgravity [PDF]
Sessile Axisymmetric Drops in Microgravity Conditions, American
Journal of Modern Physics, 2013, Volume 2, Issue 5, Pages 251-254, 2013 Interfaces with a liquid are governing several phenomena. For instance, these interfaces are giving the shape of sessile droplets and rule the spread of liquids on surfaces. Here we analyze the shape of sessile axisymmetric drops and how it is depending on the gravity, obtaining results in agreement with experimental observations under conditions of ...
arxiv +1 more source
Labyrinthine Structure with Subwavelength and Broadband Sound Insulation
Shock and Vibration, 2020 In this text, the combination of spiral structure and zigzag channels is introduced to design labyrinthine structures, in which sound waves can propagate alternately in the clockwise and counterclockwise directions.
Heng Jiang +6 more
doaj +1 more source
The influence of microgravity on invasive growth in Saccharomyces cerevisiae [PDF]
, 2011 This study investigates the effects of microgravity on colony growth and the morphological transition from single cells to short invasive filaments in the model eukaryotic organism Saccharomyces cerevisiae. Two-dimensional spreading of the yeast colonies
Daenen, Luk +8 more
core +2 more sources
Transient increases in intracellular calcium and reactive oxygen species levels in TCam-2 cells exposed to microgravity [PDF]
, 2017 The effects of microgravity on functions of the human body are well described, including alterations in the male and female reproductive systems. In the present study, TCam-2 cells, which are considered a good model of mitotically active male germ cells,
Catizone, A +5 more
core +2 more sources
Studying Planarian Regeneration Aboard The International Space Station Within The Student Space Flight Experimental Program [PDF]
, 2018 The growing possibilities of space travel are quickly moving from science fiction to reality. However, to realize the dream of long-term space travel, we must understand how these conditions affect biological and physiological processes.
Bartee, C. +3 more
core +2 more sources
Microgravity influences circadian clock oscillation in human keratinocytes [PDF]
, 2015 Microgravity and sudden changes of gravitational forces exert numerous effects on tissues, organs and apparatus. Responses to these forces variably applied to cells indicate the existence of mechan- otransduction pathways able to modulate transcription ...
Avitabile +29 more
core +1 more source
Miniaturized lab system for future cold atom experiments in microgravity [PDF]
Kulas, S., Vogt, C., Resch, A. et al. Microgravity Sci. Technol.
(2017) 29: 37, 2016 We present the technical realization of a compact system for performing experiments with cold $^{87}{\text{Rb}}$ and $^{39}{\text{K}}$ atoms in microgravity in the future. The whole system fits into a capsule to be used in the drop tower Bremen. One of the advantages of a microgravity environment is long time evolution of atomic clouds which yields ...
arxiv +1 more source