To achieve high mixing efficiency in microfluidic devices, complex designs are often required. Microfluidic devices have been evaluated with light and confocal microscopy, but fluid-flow characteristics at different depths are difficult to separate from the en face images produced. By using optical coherence tomography (OCT), an imaging modality capable of imaging 3D microstructures at micromet...

Motivated by the three-dimensional serpentine channel (Liu et al. in J Microelectromech Syst 9:190–197, 2000), we introduce a chaotic serpentine mixer (CSM) and demonstrate a systematic way of utilizing a mapping method to find out an optimal set of design variables for the CSM. One periodic unit of the mixer has been designed to create two streamlines portraits crossing each other. As a prelim...

-The chemical composition of mixed-layer serpentine/chlorite (Sp/Ch) in Tuscaloosa Formation sandstone was analyzed by energy dispersive X-ray spectroscopy (EDX) in the scanning electron miscroscope (SEM) and by X-ray diffraction (XRD). EDX results indicate little depth-controlled variation in composition, whereas XRD results suggest distinct decreases in octahedral Fe and tetrahedral A1. XRDde...

In this paper, we report the development of a simple inertial microfluidic device with a serpentine channel for efficiently separating blood cells from plasma. The working mechanism of this device relies on the two-sided secondary flow aided inertial focusing of particles in a serpentine channel. Specifically, blood cells were focused along two sides of the channel, while the blood plasma was c...

When a serpentine tape drive is used as a slow random access device, the I/O performance can be substantially improved by clever re-ordering of the I/O requests. This kind of re-ordering relies on a scheduling algorithm and a model of the access time. In this paper, we propose a low-cost access time model for serpentine tape drives, which is not a trivial task due to the complex data layout of ...

Certain Rauwolfia alkaloids (reserpine, rescinnamine,serpentine, ajmaline and ajmalicine) were investigated for their central vasodepressant effects in cats. 5-Hydroxytryptamine was included in this study because it has been implicated as a mediator in the action ofreserpine and rescinnamine. Pressor responses were elicited from the medullary vasopressor locus with the steriotaxic technic, and ...

The existence of a frozen mode in periodic serpentine waveguide with broken longitudinal symmetry is demonstrated numerically. associated stationary inflection point (SIP) the Bloch dispersion relation, where three eigenmodes collapse on each other, as it an exceptional order three. regime characterized by vanishing group velocity and enhanced field amplitude, which can be very attractive vario...

Various flow field designs have been numerically investigated to evaluate the effect of pattern and cross-sectional dimensions channel on performance a large active area PEM fuel cell. Three types multiple-serpentine channels (7-channels, 11-channels 14-channels) chosen for 200 cm2 cell analysed by varying width land channel. The CFD simulations showed that as decreases, in 14-channels serpenti...