Dr. Agus Haryono Profile

Dr. Agus Haryono

at Indonesian Institute of Sciences

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Publications (3)

Proceedings Article | 20 May 2010 Paper

Numerical simulation of single electron transistor using master equation

Ratno Nuryadi, Agus Haryono

Proceedings Volume 7743, 77430L (2010) https://doi.org/10.1117/12.862848

KEYWORDS: Transistors, Diamond, Capacitance, Numerical simulations, Circuit switching, Stochastic processes, Device simulation, Mesoscopic physics, Chemical species, Modulation

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Proceedings Article | 20 May 2010 Paper

Influence of palmitoyl pentapeptide and Ceramide III B on the droplet size of nanoemulsion

Dewi Sondari, Agus Haryono, Sri Budi Harmami, Ahmad Randy

Proceedings Volume 7743, 77430D (2010) https://doi.org/10.1117/12.862919

KEYWORDS: Particles, Skin, Minerals, Bioalcohols, Curium, Translucency, Molecules, Nanotechnology, Collagen, Imaging systems

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The influence of the Palmitoyl Pentapeptide (PPp) and Ceramide IIIB (Cm III B) as active ingredients on the droplet size of nano-emulsion was studied using different kinds of oil (avocado oil, sweet almond oil, jojoba oil, mineral oil and squalene). The formation of nano-emulsions were prepared in water mixed non ionic surfactant/oils system using the spontaneous emulsification mechanism. The aqueous solution, which consist of water and Tween® 20 as a hydrophilic surfactant was mixed homogenously. The organic solution, which consist of oil and Span® 80 as a lipophilic surfactant was mixed homogenously in ethanol. Ethanol was used as a water miscible solvent, which can help the formation of nano-emulsion. The oil phase (containing the blend of surfactant Span® 80, ethanol, oil and active ingredient) and the aqueous phase (containing water and Tween® 20) were separately prepared at room temperatures. The oil phase was slowly added into aqueous phase under continuous mechanical agitation (18000 rpm). All samples were subsequently homogenized with Ultra-Turrax for 30 minutes. The characterizations of nano-emulsion were carried out using photo-microscope and particle size analyzer. Addition of active ingredients on the formation of nano-emulsion gave smallest droplet size compared without active ingredients addition on the formation of nano-emulsion. Squalene oil with Palmitoyl Pentapeptide (PPm) and Ceramide IIIB (Cm IIIB) gave smallest droplet size (184.0 nm) compared without Palmitoyl Pentapeptide and Ceramide IIIB (214.9 nm), however the droplets size of the emulsion prepared by the other oils still in the range of nano-emulsion (below 500 nm). The stability of nano-emulsion was observed using two methods. In one method, the stability of nano-emulsion was observed for three months at temperature of 5°C and 50°C, while in the other method, the stability nano-emulsion was observed by centrifuged at 12000 rpm for 30 minutes. Nanoemulsion with active ingredient was remained stable even when stored until three months. Coalescence process between the droplets was not occurred significantly and droplet size was still below 500 nm. Over all, the emulsion remained stable, even it was centrifuged at 12000 rpm for 30 minutes.

Proceedings Article | 20 May 2010 Paper

Antimicrobial effect of nylon fiber immersed with nano-silver

Agus Haryono, Sri Budi Harmami, Dewi Sondari

Proceedings Volume 7743, 77430H (2010) https://doi.org/10.1117/12.862832

KEYWORDS: Silver, Nanoparticles, Particles, Absorption, Scanning electron microscopy, Nanocomposites, Deposition processes, Bacteria, FT-IR spectroscopy, Polymers

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