Control Design Applied to a Micro Electro Mechanical System: MEMS Comb drive

This paper presents the linear optimal control technique for reducing the chaotic movement of the micro-electro-mechanical Comb Drive system to a small periodic orbit. We analyze the non-linear dynamics in a micro-electro-mechanical Comb Drive and demonstrated that this model has a chaotic behavior. Chaos control problems consist of attempts to stabilize a chaotic system to an equilibrium point, a periodic orbit, or more general, about a given reference trajectory. This technique is applied in analyzes the nonlinear dynamics in an MEMS Comb drive. The simulation results show the identification by linear optimal control is very effective

Effect of adiponectin on reduction of androstenedione serum levels (24h).

<p>Mice previously synchronized with equine gonadotropin chorionic (eCG), were submitted to one of the four different treatments: 1) Group 1- control (PBS), Group 2—adiponectin 0.1 μg/mL, Group 3—adiponectin 1 μg/mL, and Group 4—adiponectin 5 μg/mL. After 24 h the animals were euthanized and serum levels of androstenedione evaluated (mean ± SEM). There was a statistically significant reduction in adiponectin treated groups (ANOVA p = 0.01).</p

Effects of the different doses of adiponectin on markers of direct oxidative stress (AOPP)(A) and anti-oxidant capacity (FRAP and Nox)(B and C).

<p>(A)Compared to control cells, adiponectin treatment (in all doses tested) decreased the AOPP levels (ANOVA, P = 0.0003). (B and C) No differences were seen in terms of anti-oxidant capacity markers, namely FRAP and NoX. Data shown represents mean ± SEM (A) or median (IQ 25–75%) (B and C).</p

Fungal laccases as biocatalysts for wide range applications

32 p.-5 fig.Fungal laccases are multicopper oxidases with high catalytic versatility and low catalytic requirements (only O2 of the air is required for activation). Their high redox potential, especially of certain basidiomycete laccases, significantly increases their oxidation capacity compared to bacterial laccases. These characteristics together provide these enzymes with great potential for applications as biocatalysts in a range of synthetic or degrading reactions. We review here some of the main properties and biotechnological applications of fungal laccases, underlining their overexpression limitations for industrial scale application. We focus on the use of laccases as biocatalysts for organic synthesis, with special emphasis on polymer synthesis.Peer reviewe