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    How to predict product temperature changes during transport in an insulated box equipped with an ice pack: Experimental versus 1-D and 3-D modelling approaches
    (2019-04-01)
    Laguerre, O.
    ;
    Chaomuang, N.
    ;
    Derens, E.
    ;
    Flick, D.
    An experiment was carried out to monitor food temperature changes with time in two insulated boxes equipped with an ice pack. The first experiment was carried out in a test room under well controlled ambient temperature and with a box of reinforce lateral insulation. The second experiment was in real use condition and with 2 different boxes. Two models were developed to predict product temperature changes until the ice is completely melted: an analytical 1-D and a 3-D model. The 1D model predictions are in good agreement for the first experiment. But in real use condition, the 1D model underestimates the temperature evolution, while the 3-D model gives better prediction. A comparison of the advantages and disadvantages of these two models was performed. The 1-D approach enables prediction of the main parameters (warmest temperature, ice melting time). A correction factor was proposed to improve the prediction precision using the 1-D model.
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    Simulating the transport and chemical evolution of biomass burning pollutants originating from Southeast Asia during 7-SEAS/2010 Dongsha experiment
    (2015-07-01)
    Chuang, Ming Tung
    ;
    Fu, Joshua S.
    ;
    Lin, Neng Huei
    ;
    Lee, Chung Te
    ;
    Gao, Yang
    This study aimed to simulate the transport of biomass burning (BB) aerosol originating from Southeast Asia (SEA) during the Dongsha Experiment conducted from March 2010 to April 2010. Transport pathways were reanalyzed and steering flow in the mid-latitude areas and anticyclones in low-latitude areas were found to control the transport of BB plume after it was injected to a high atmosphere. For the 12 simulated and observed events at Mt. Lulin (2862m MSL; 23°28'07″ N, 120°52'25″ E), the 72h backward trajectories were all tracked back to southern China and northern Indochina, which were the locations of the largest BB fire activities in SEA. Chemical evolutions of BB pollutants along the moving trajectories showed that organic matter was always the dominant component in PM<inf>2.5</inf>, consistent with the observations at both near-source regions and Mt. Lulin. For nitrogen species, nearly all NO<inf>x</inf> molecules oxidized into HNO<inf>3</inf>, NO<inf>3</inf><sup>-</sup>, PAN, and PANX in fires or near fires. The synchronic consumption of NO<inf>x</inf>, SO<inf>2</inf>, and NH<inf>3</inf> explained the production of the major components of inorganic salts. In the moving BB plume, sulfate concentration increased with decreased nitrate concentration. Ratios of ammonium to PM<inf>2.5</inf> and elemental carbon to PM<inf>2.5</inf> remained nearly constant because additional sources were lacking.
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    Gold nanoparticle trapping and delivery for therapeutic applications
    (2012-02-10)
    Aziz, M. S.
    ;
    Suwanpayak, Nathaporn
    ;
    Jalil, Muhammad Arif
    ;
    Jomtarak, R.
    ;
    Saktioto, T.
    A new optical trapping design to transport gold nanoparticles using a PANDA ring resonator system is proposed. Intense optical felds in the form of dark solitons controlled by Gaussian pulses are used to trap and transport nanoscopic volumes of matter to the desired destination via an optical waveguide. Theoretically, the gradient and scattering forces are responsible for this trapping phenomenon, where in practice such systems can be fabricated and a thin-film device formed on the specific artifcial medical materials, for instance, an artificial bone. The dynamic behavior of the tweezers can be tuned by controlling the optical pulse input power and parameters of the ring resonator system. Different trap sizes can be generated to trap different gold nanoparticles sizes, which is useful for gold nanoparticle therapy. In this paper, we have shown the utility of gold nanoparticle trapping and delivery for therapy, which may be useful for cosmetic therapy and related applications. © 2012 Aziz et al.