Siam Physics Congress 2018

Session

A01:Biological (Poster)

21 May 2018, 17:45

Topland | Hotel & Convention Center Phitsanulok

438. A Molecular Dynamics Study to Predict Protonation Sites on the Xylanase Surface.

Ms Kewalin Posansee (Department of Physics, KMUTT.)

21/05/2018, 17:45

Biological Physics and Biomedical Engineering

Poster

Xylanase enzyme families play an important role in many industries due to its ability to digest the hemicellulose within plant cell walls. Developing the enzyme that can withstand extreme conditions under an industrial process and in a stomach requires an extended information in molecular scale for further protein engineering. In this study, atomistic molecular dynamics simulation and analysis...

581. Collapse of Cavitation Bubble Inside Microalgae

Mr Yanathip Thipmaungprom (Chulalongkorn University)

21/05/2018, 17:45

Biological Physics and Biomedical Engineering

Poster

One of the interesting methods used in disrupting microalgae is ultrasonication. In this study, the Keller-Miksis equation was used to simulate the dynamics of cavitation bubble inside microalgae cell species C. gracilis, C. calcitrans and Nannochloropsis sp. at frequencies of 1.0, 2.2, 3.3 and 4.3 MHz at the same acoustic intensity of 2.2 W/cm$^2$ and the physical effects of collpased...

776. E. coli electroporation on tapered microfluidic system

Ms Jongrak Sanglao (Master's Degree Program in Physics, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand)

21/05/2018, 17:45

Biological Physics and Biomedical Engineering

Poster

Electroporation is the technique used in creating pores on cell membrane by exposing the cell to high electric field strength. Microfluidic electroporation device takes advantages of miniaturized fluidic channel and electrode fabrication in obtaining high electric field strength using low applied voltage. In this work, the tapered microfluidic device for E. coli electroporation was developed...

815. Effects of pulse-electric fields on tilapia’s egg surfaces with rectangular and exponential decay waveforms

Dr Sakshin Bunthawin (Biotechnology of Electromechanics Research Unit, Science of Physics, Faculty of Technology and Environment, Prince of Songkla University, Phuket 83120, Thailand)

21/05/2018, 17:45

Biological Physics and Biomedical Engineering

Poster

In both electro-permeabilization and electrofusion, a high-intensity DC pulse electric field is employed to induced membrane breakdown and deliver macromolecules into living- targeted biological cells. The transient electric field is always applied in a pulsed form to prevent irreversible cell damage. The most commonly used waveforms are the rectangular pulse (square pulse, SP) and the...

816. Increasing efficiency in commercial sex reversal of tilapia with pulses electric fields

Dr Sakshin Bunthawin (Biotechnology of Electromechanics Research Unit, Science of Physics, Faculty of Technology and Environment, Prince of Songkla University, Phuket 83120, Thailand)

21/05/2018, 17:45

Biological Physics and Biomedical Engineering

Poster

This research had been extended from our previous project of electrical sex reversal for monosex-male Nile tilapia by using pulse-electric fields (Fish X-Change) to increase all-male sex reversal (MSR), survival rate (SR), hatching rate (HR) and cleaning cell surfaces during the hatchery process. In order to reduce the mortality rate and increase the survival rate, the effect of high-voltage...

431. SYNTHESIS OF TiO2 DOPED SELENIUM NANOPARTICLES USING HERBAL TURMERIC POWDERS COATING ON COTTON FABRIC FOR ANTIBACTERIAL

Dr Mahamasuhaimi Masae (Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Srivijaya, Songkhla, 90000 Thailand)

21/05/2018, 17:45

Biological Physics and Biomedical Engineering

Poster

Present work to investigation of structure and functional properties of nano materials based on the Titanium dioxide doping Selenium oxide and Turmeric coated cellulose fibers of gauze pad cotton. The Titania hydrosol was successfully prepared at low temperature by a microwave facilitated sol-gel method. The study also explored the efficiency of this sample to inhibit the growth of Escherichia...

698. Theoretical Investigation of Effects of Reynolds Number and Morphology on Localized Drag on Spheres, Spheroids, Rods and Segment of Helixes

Pongpitch Panyura (Department of Physics, Faculty of Science, Chulalongkorn University)

21/05/2018, 17:45

Biological Physics and Biomedical Engineering

Poster

Diverse morphological shapes of cyanobacteria (blue green algae) have been observed in the natural environment; Synechocystis sp is found to be spherical, whereas Arthrospira is either a rod in a stationary phase or a helix in a logarithmic growth phase. Effects of Reynolds number and shapes on the localized drag exerted on solid objects with different geometrical shapes resembling the shapes...

429. Why is the low-energy ion beam fluence to induce cell mutation orders higher than the cell lethal dose? – A puzzle

Dr L.D. Yu (Chiang Mai University)

21/05/2018, 17:45

Biological Physics and Biomedical Engineering

Poster

Experimental facts have showed that in application of low-energy ion beam for biological living materials modification, the ion beam fluence required to induce cell mutation is orders higher than the cell lethal dose. This seems contradictory with common perception that the DNA modification should be proportional to radiation dose so that high dose radiation could cause high-degree damage in...