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Adsorption of human serum proteins (Albumin and total protein) onto high purity synthesis nano-hydroxyapatite (HA), Ca₁₀(PO₄)₆(OH)₂, has been studied in a wide temperature range by UV-visible spectrophotometer. Adsorption isotherm is basically important to describe how solutes interact with adsorbent, and is critical in optimizing the use of adsorbent. In the present study, the experimental results were fitted to the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (DR) models to obtain the characteristic parameters of each model and square of the correlation coefficients (R²). According to the results, the DR isotherm model had the best agreement with the experimental data. The effect of temperature on adsorption of human serum proteins (HSP) onto the synthesized nano-HA was studied. The experimental results indicated that temperature increase generally causes an increase in the adsorption of HSP onto the nano-HA. This is basically due to the effect of temperature on the HSP activity and its diffusion rate on HA surfaces.

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Information security has become an important concern in healthcare systems, owing to the increasing prevalence of medical devices and the growing use of wearable and mobile computing platforms for health and lifestyle monitoring. Previous work in the area of health information security has largely focused on attacks on the wireless communication channel of medical devices, or on health data stored in online databases.In this work, we pursue an entirely different angle to health information security, motivated by the insight that the human body itself is a rich source (acoustic, visual, and electromagnetic) of data. We propose a new class of information security attacks that exploit physiological information leakage, i.e., various forms of information that naturally leak from the human body, to compromise privacy. As an example, we demonstrate attacks that exploit acoustic leakage from the heart and lungs.The medical devices deployed within or on our bodies also add to natural sources of physiological information leakage, thereby increasing opportunities for attackers. Unlike previous attacks on medical devices, which target the wireless communication to/from them, we propose privacy attacks that exploit information leaked by the very operation of these devices. As an example, we demonstrate how the acoustic leakage from an insulin pump can reveal important information about its operation, such as the duration and dosage of insulin injection. Moreover, we show how an adversary can estimate blood pressure (BP) by capturing and processing the electromagnetic radiation of an ambulatory BP monitoring device.

Due to the unique optical and electronic properties of conjugated polymers, much research has been conducted to study the effect of the incorporation of electron-transporting materials on the polymer blends' compatibility and their capability for use in optoelectronic devices. In this work, to characterize the optoelectronic properties of blend thin films of poly [2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV) with benzothiadiazole (BT), polymer lightemitting diodes (PLEDs) with single-emission layers of MEH-PPV + BT blends have been fabricated. The influence of MEH-PPV + BT blend weight ratios over ITO/PEDOT:PSS/MEH-PPV + BT/Al PLEDs performances, e.g., lifetime, turn-on voltage, and current density-voltage (J-V) characteristics, has been studied. According to the obtained results, the turn-on voltage of the devices successfully decreased with the addition of the BT as an electronic transportation material. At an optimum condition, we obtained a turn-on voltage as low as 5 V and a lifetime of about 190 h for a device incorporating 65% BT. The logarithmic plots of the J-V characteristics of the fabricated devices showed a power law behavior (J ∝ V k+1 ) with three distinct regions. The J-V characteristics have been explained by the Fowler-Nordheim (FN) tunneling model. It was found that the hole-injection barrier height decreases with increasing BT content in the range of 0-65%. According to the obtained results, in all of our investigations, the electroluminescence (EL) originated exclusively from the MEH-PPV material, even for the high BT contents.