Results 281 to 290 of about 568,260 (340)

Smart Hydrogel Doped by Metal–Organic Frameworks for Renewable Self‐Pumping Enzymatic Reactors

Advanced Science, EarlyView.
Renewable self‐pumping enzymatic reactors based on thermo‐stimulated cyclic contraction/expansion of metal‐organic frameworks‐doped hydrogel. Abstract The construction of high‐performance immobilized enzymes is vastly desired for green biotransformation.
Yuxi Zhu, Shenghao Wang, Yueyuan Luo, Linbo Cao, Xiuxiu Guo, Yue Zhang, Mingmin Li, Tie Wang   +7 more
wiley   +1 more source

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The phases of the cardiac cycle

American Heart Journal, 1972
Abstract The events of the cardiac cycle are re-evaluated on the basis of newer ideas of inertial states, compliance, and similar hemodynamic principles by the use of more precise, modern recording equipment. While these events generally agree with classic schemes, certain discrepancies which tend to cause inaccurate measurement are presented.
A A, Luisada, D M, MacCanon
openaire   +2 more sources

The Cardiac Sarcomere and Cell Cycle

Current Cardiology Reports, 2022
The lack of adult human cardiomyocyte proliferative capacity impairs cardiac regeneration such as after myocardial injury. The sarcomere, a specialized actin cytoskeletal structure that is essential for twitch contraction in cardiomyocytes, has been considered a critical factor limiting adult human cardiomyocyte proliferation through incompletely ...
Anthony M. Pettinato, Feria A. Ladha, J. Travis Hinson   +2 more
openaire   +2 more sources

The cardiac cycle

Anaesthesia & Intensive Care Medicine, 2012
Abstract The heart consists of four chambers that are connected in such a way that contraction of them causes the heart to act as a pump, the right half of the heart passing blood from the venae cavae to the pulmonary circulation for oxygenation and the left half of the heart pumping oxygenated blood from the pulmonary veins into the aorta and ...
openaire   +1 more source

Oscillations of cAMP with the cardiac cycle

Biochemical and Biophysical Research Communications, 1983
Oscillations of cAMP with the cardiac cycle were demonstrated in the rat heart using a stimulator-triggered rapid freeze-clamp to decrease the temperature of the heart from 37 degrees C to -80 degrees C in 5 msec (20,000 degrees/sec) at a predetermined phase of the cardiac cycle. The nucleotide, cAMP, oscillated 60% with the cardiac cycle during normal
J, Wikman-Coffelt, R, Sievers, R J, Coffelt, W W, Parmley   +3 more
openaire   +2 more sources

The cardiac cycle—a model

Journal of Biological Education, 1985
This easy-to-construct model makes use of the redundant kymograph and illustrates dramatically the cardiac ...
L. A. Morgan, N. Ross
openaire   +1 more source

The Cardiac Cycle

Abstract The cardiac cycle is a series of physiological events in which blood moves through the chambers of the heart in alternating phases of systole and diastole. Movement of blood throughout the cardiac chambers is dependent on pressure changes and gradients, generated by alternating contraction and relaxation of myocardium.
Robert Pellicer, Alaa Abd-Elsayed
openaire   +1 more source

Signal Detection and the “Cardiac Arousal Cycle”

Psychophysiology, 1972
ABSTRACTThe hypothesis was tested that different phases of the cardiac cycle would be associated with differences in either sensory capacity or response bias, as estimated by signal detection analyses. Each of 10 subjects was given 800 signal (SN) and 800 non‐signal (N) trials randomly distributed throughout the cardiac cycle.
L F, Delfini, J J, Campos
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Detection of the Heartbeat and Events in the Cardiac Cycle

Psychophysiology, 1985
ABSTRACTIn previous studies the heartbeat has been defined in terms of individual components of the cardiac cycle (e.g., the R‐wave or the ventricular contraction) as specified by the experimenter, and subjects have been classified as nondetectors if they failed the task set by the experimenter.
A J, Yates, K E, Jones, G V, Marie, J H, Hogben   +3 more
openaire   +2 more sources