Processes affecting horizontal mixing and dispersion in Winam Gulf, Lake Victoria

Isolation of Salmonella and Shigella from fish harvested from the Winam Gulf of Lake Victoria, Kenya.

BACKGROUND Human infections caused by pathogens transmitted from fish are quite common. The aim of this study was to isolate enteric pathogenic bacteria from fish that might be transmitted to humans after the handling or consumption of such fish. METHODOLOGY One hundred and twenty Nile tilapia fish harvested using various fishing methods were collected from fishermen in five fish landing beac...

Dioxin-like PCBs and PCDD/Fs in surface sediments near the shore of Winam Gulf, Lake Victoria.

Winam Gulf of Lake Victoria is considered to be contaminated with toxic chemicals emanating from anthropogenic activities, especially near large industrial towns such as Kisumu. This has recently caused concerns about its water quality and impact on aquatic organisms and human beings. This study was justified by the need to generate baseline concentrations of polychlorinated dibenzo-p-dioxins (...

Direct observation of dispersion and mixing processes in microfluidic systems.

The diffusion phenomena, dispersion and mixing processes of the sample solute (Basic Blue 3 dye and KMnO4 aqueous solutions) were directly observed in laminar flow in glass microchannels. Quasi steady-state UV-visible absorption spectrometry was carried out using CCD camera images of the colored sample dispersion and mixing processes, and the absorbance change (DeltaAbs) was discussed based on ...

Biomagnification of mercury in fish from Thruston Bay, Napoleon Gulf, Lake Victoria (East Africa)

Competing four-wave mixing processes in dispersion oscillating telecom fiber.

We experimentally study the dynamics of the generation of multiple sidebands by means of a quasi-phase-matched four-wave mixing (FWM) process occurring in a dispersion-oscillating, highly nonlinear optical fiber. The fiber under test is pumped by a ns microchip laser operating in the normal average group-velocity dispersion regime and in the telecom C band. We reveal that the growth of higher-o...