Peristaltic transport of micropolar fluid through porous medium in a symmetric channel with heat and mass transfer in the presence of generation and radiation
The effect of heat generation and radiation on the peristaltic motion of micropolar fluid with heat and mass transfer through porous medium in a symmetric channel was investigated. The equations of motion for micropolar fluids were introduced as well as the equations of energy and concentration. The system of these equations written in two dimensions and then transformed using the transformations between a laboratory and fixed frames. The yield equations were solved analytically with the appropriate boundary conditions under the approximation of low Reynolds number and long wavelength. The longitudinal velocity, the microrotation velocity, the temperature and the concentration are plotted and shown graphically and discussed for different physical parameters of the problem. 
 
   
 
 Key words: Peristaltic transport, micropolar fluid, porous medium, heat and mass transfer, heat generation, thermal radiation, thermal diffusion.
Investigation of Hall current and slip conditions on peristaltic transport of Cu-water nanofluid in a rotating medium
Abstract Main objective of present study is to analyze the effect of rotation on peristaltic transport of copper-water nanofluid. Two phase nanofluid is employed. The fluid fills the porous space. The channel walls are taken flexible. Hall current and viscous dissipation effects are also given consideration in the modeling. Analysis also studies the slip conditions in presence of heat generation/absorption. Resulting coupled system of equations is simplified by employing lubrication approach. Exact solutions are presented for the stream function whereas energy equation is solved numerically. Impact of sundry parameters on flow quantities are discussed and displayed via graphs. It is concluded that both axial ( u ) and secondary ( v ) velocities are reduced for increasing nanoparticle volume fraction ( ϕ ). Hartman number ( M ) and Hall parameter ( m ) have opposite effects on the velocity. Temperature ( θ ) enhances for increasing Hartman number ( M ).
Gill diseases of cultured salmonids in Ontario.
Between 1977 and 1981, the Fish Pathology Laboratory of the Ontario Veterinary College received 239 cases from trout farms of southern Ontario, 51 (21.3%) of which had diseased gills. Branchial lesions in 86.3% of these 51 cases were characterized by marked lamellar epithelial hyperplasia with epithelial hypertrophy and lamellar fusion. Filamentous bacteria were seen on the surface of the branchial filaments and lamellae in 68.6% of the cases. Our observations highlight the importance of gill diseases as a production problem of farmed salmonids in southern Ontario.