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The purpose of the current flow configurations is to bring to attention the thermophysical aspects of magnetohydrodynamics (MHD) Williamson nanofluid flow under the effects of Joule heating, nonlinear thermal radiation, variable thermal coefficient and activation energy past a rotating stretchable surface.

A mathematical model is examined to study the heat and mass transport analysis of steady MHD Williamson fluid flow past a rotating stretchable surface. Impact of activation energy with newly introduced variable diffusion coefficient at the mass equation is considered. The transport phenomenon is modeled by using highly nonlinear PDEs which are then reduced into dimensionless form by using similarity transformation. The resulting equations are then solved with the aid of fifth-order Fehlberg method.

The rotating fluid, heat and mass transport effects are analyzed for different values of parameters on velocity, energy and diffusion distributions. Parameters like the rotation parameter, Hartmann number and Weissenberg number control the flow field. In addition, the solar radiation, Joule heating, Prandtl number, thermal conductivity, concentration diffusion coefficient and activation energy control the temperature and concentration profiles inside the stretching surface. It can be analyzed that for higher values of thermal conductivity, Eckret number and solar radiation parameter the temperature profile increases, whereas opposite behavior is noticed for Prandtl number. Moreover, for increasing values of temperature difference parameter and thermal diffusion coefficient, the concentration profile shows reducing behavior.

This paper is useful for researchers working in mathematical and theoretical physics. Moreover, numerical results are very useful in industry and daily-use processes.

Students’ assignments are often much better in style and organisation than the email messages they send to theirteachers. Some teachers, including myself, often ‘covertly’ correct students’ email messages for style, organisation,content, or correctness. While some students appreciate this extra effort from the teachers, others see it as an inhibitingintrusion. However, I have frequently noticed that students who are corrected repeatedly improve in writing emails. Myresearch concerns both the use of academic email writing and the correction of errors in student emails, and concludesthe following: students usually write only formal emails to their teachers; those instructors who correct email errors do notoffer explicit error correction; and if email writing were taught to the students, it would offer variety in the writing genresstudents currently compose

Purpose – The objective of the present study was to determine the effect of monosodium glutamate (MSG) administration to pyramidal cells necrosis on the cerebral cortex of Wistar male rats (Rattus norvegicus).

Design/Methodology/Approach – This research was a laboratory quasi-experiment study with post-test control group design on 24 male Wistar rats (Rattus norvegicus) aged 8-10 weeks, weighted 200 ± 10 gr, divided into 4 groups (GI or control group, GII treated with MSG dose 6 mg/grbb/day, GIII 12 mg/grbb/day, and GIV 24 mg/grbb/day) for 21 days consecutively. Pyramidal cells observed in 10 field of view. The Kruskal-Wallis test and Mann Whitney tests were used to analyze the data.

Findings – There were significant differences between pyramidal cells necrosis numbers between control and the treatment groups. MSG doses 6, 12, and 24 mg/grbb/day developed the pyramidal cells necrosis in the cerebral cortex (p < 0,005).