Biothermodynamics Of Live Cells: Energy Dissipation And Heat Generation In Cellular Cultures

2013 ◽  
pp. 497-566
Keyword(s):  
Energy Dissipation ◽  
Heat Generation ◽  
Live Cells

Investigation of dynamic heat generation and transfer behavior and energy dissipation for nonlinear synchronous belt transmission

2018 ◽  
Vol 144 ◽  
pp. 457-468 ◽  
Author(s):  
Wenbo Li ◽  
Xiaojie Zhang ◽  
Yuanyuan Shang ◽  
Qi Chen ◽  
Chunhua Chen ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Heat Generation ◽  
Transfer Behavior ◽  
Belt Transmission

Heat generation associated with pressure-induced infiltration in a nanoporous silica gel

2008 ◽  
Vol 23 (7) ◽  
pp. 1902-1906 ◽  
Author(s):  
Aijie Han ◽  
Venkata K. Punyamurtula ◽  
Yu Qiao
Keyword(s):  
Energy Dissipation ◽  
Temperature Variation ◽  
Temperature Change ◽  
Silica Gel ◽  
Heat Generation ◽  
Temperature Increase ◽  
Maximum Temperature ◽  
Nanoporous Silica ◽  
Sorption Behavior ◽  
Multiple Loading

As a liquid moves in the nanopores of a silica gel, because of the hysteresis of sorption behavior, significant energy dissipation can take place. Through a calometric measurement, the characteristics of associated heat generation are investigated. The temperature variation increases with the mass of silica gel, which consists of a reversible part and an irreversible part. The residual temperature change is about 30% to 60% of the maximum temperature increase and can be accumulated as multiple loading cycles are applied.

scholarly journals MODEL OF HEAT GENERATION DURING DEFORMATION OF MEDIA WITH INTERNAL STRESSES

2021 ◽  
Vol 1 (74) ◽  
pp. 62-64
Author(s):  
B. Zimin ◽  
A. Khitrina
Keyword(s):  
Energy Dissipation ◽  
Physical Properties ◽  
Heat Release ◽  
Heat Generation ◽  
Solid Body ◽  
Internal Stresses ◽  
Elastic Stage

Observations of a solid body with internal stresses have been carried out, this model allows us to describe the energy dissipation during the change of the elastic stage of deformation to the plastic one. The dependence of heat release on the heat physical properties of the contacting structures is noted.

Energy dissipation characteristics of crosslinks in natural rubber: an assessment using low and high-frequency analyzer

2018 ◽  
Vol 38 (8) ◽  
pp. 723-729 ◽  
Author(s):  
K. Anas ◽  
Samson David ◽  
R.R. Babu ◽  
M. Selvakumar ◽  
S. Chattopadhyay
Keyword(s):  
Energy Dissipation ◽  
Natural Rubber ◽  
Heat Generation ◽  
High Frequency ◽  
Crosslink Density ◽  
Vibration Isolation ◽  
Very High Frequency ◽  
Rubber Compounds ◽  
Lower Heat ◽  
Very High

AbstractThe dynamic deformation of a viscoelastic material can cause heat generation. This heat generation is an aspect of energy dissipation. The present paper investigates the contribution of crosslink type and density on energy dissipation mechanism in natural rubber compounds. The influences of these elements are investigated using a very high frequency (VHF) analyzer (VHF 104) and a dynamical mechanical analyzer (DMA). The VHF 104 analyzer follows transmissibility and vibration isolation principle, whereas DMA works on dynamical mechanical the deformation principle. Higher crosslink density promotes lower heat generation in rubber compounds. Tanδinterpretation for energy dissipation characteristics of rubbery compounds should be done judiciously to avoid wrong interpretations. Polysulfidic linkages show higher damping ratios (ζ) than monosulfidic or disulfidic linkages due to their dissipative nature. The natural frequency (ωn) of a system at a given mass is the function of its crosslink density.

4-dimensional, high-resolution imaging of living cells

1992 ◽  
Vol 50 (1) ◽  
pp. 416-417
Author(s):  
Shinya Inoué
Keyword(s):  
Light Microscope ◽  
Living Cells ◽  
Live Cells ◽  
Video Tape ◽  
Active Living ◽  
High Resolution Imaging ◽  
3 Dimensional ◽  
Dynamic Architecture ◽  
Resolution Imaging ◽  
Disk Memory

This paper reports progress of our effort to rapidly capture, and display in time-lapsed mode, the 3-dimensional dynamic architecture of active living cells and developing embryos at the highest resolution of the light microscope. Our approach entails: (A) real-time video tape recording of through-focal, ultrathin optical sections of live cells at the highest resolution of the light microscope; (B) repeat of A at time-lapsed intervals; (C) once each time-lapsed interval, an image at home focus is recorded onto Optical Disk Memory Recorder (OMDR); (D) periods of interest are selected using the OMDR and video tape records; (E) selected stacks of optical sections are converted into plane projections representing different view angles (±4 degrees for stereo view, additional angles when revolving stereos are desired); (F) analysis using A - D.

Multi-mode light microscopy of microtubule assembly dynamics and chromosome movement in vivo and In vitro

1996 ◽  
Vol 54 ◽  
pp. 730-731
Author(s):  
E. D. Salmon ◽  
J. C. Waters ◽  
C. Waterman-Storer
Keyword(s):  
Imaging System ◽  
Ccd Camera ◽  
Transmitted Light ◽  
Microtubule Assembly ◽  
Live Cells ◽  
Optical Efficiency ◽  
Multiple Band ◽  
Multi Mode

We have developed a multi-mode digital imaging system which acquires images with a cooled CCD camera (Figure 1). A multiple band pass dichromatic mirror and robotically controlled filter wheels provide wavelength selection for epi-fluorescence. Shutters select illumination either by epi-fluorescence or by transmitted light for phase contrast or DIC. Many of our experiments involve investigations of spindle assembly dynamics and chromosome movements in live cells or unfixed reconstituted preparations in vitro in which photodamage and phototoxicity are major concerns. As a consequence, a major factor in the design was optical efficiency: achieving the highest image quality with the least number of illumination photons. This principle applies to both epi-fluorescence and transmitted light imaging modes. In living cells and extracts, microtubules are visualized using X-rhodamine labeled tubulin. Photoactivation of C2CF-fluorescein labeled tubulin is used to locally mark microtubules in studies of microtubule dynamics and translocation. Chromosomes are labeled with DAPI or Hoechst DNA intercalating dyes.

Characterization of a Motile Cellular Domain Arising During the Amoebo-Flagellate Transformation of Physarum Polycephalum

1980 ◽  
Vol 38 ◽  
pp. 552-553
Author(s):  
K.I. Pagh ◽  
M.R. Adelman
Keyword(s):  
Cell Shape ◽  
Physarum Polycephalum ◽  
Slime Mold ◽  
Live Cells ◽  
Cellular Domain

Unicellular amoebae of the slime mold Physarum polycephalum undergo marked changes in cell shape and motility during their conversion into flagellate swimming cells (l). To understand the processes underlying motile activities expressed during the amoebo-flagellate transformation, we have undertaken detailed investigations of the organization, formation and functions of subcellular structures or domains of the cell which are hypothesized to play a role in movement. One focus of our studies is on a structure, termed the “ridge” which appears as a flattened extension of the periphery along the length of transforming cells (Fig. 1). Observations of live cells using Nomarski optics reveal two types of movement in this region:propagation of undulations along the length of the ridge and formation and retraction of filopodial projections from its edge. The differing activities appear to be associated with two characteristic morphologies, illustrated in Fig. 1.

Heat Generation and Transport in the Earth

2010 ◽  
Author(s):  
Claude Jaupart ◽  
Jean-Claude Mareschal
Keyword(s):  
Heat Generation ◽  
The Earth
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