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A magneto couple stress nanofluid flow along with double diffusive convection is presented for peristaltic induce flow through symmetric nonuniform channel. A comprehensive mathematical model is scrutinized for couple stress nanofluid magneto nanofluids and corresponding equations of motions are tackled by applying small Reynolds and long wavelength approximation in viewing the scenario of the biological flow. Computational solution is exhibited with the help of graphical illustration for nanoparticle volume fraction, solutal concentration and temperature profiles in MATHEMTICA software. Stream function is also computed numerically by utilizing the analytical expression for nanoparticle volume fraction, solutal concentration and temperature profiles. Whereas pressure gradient profiles are investigated analytically. Impact of various crucial flow parameter on the pressure gradient, pressure rise per wavelength, nanoparticle volume fraction, solutal concentration, temperature and the velocity distribution are exhibited graphically. It has been deduced that temperature profile is significantly rise with Brownian motion, thermophoresis, Dufour effect, also it is revealed that velocity distribution really effected with strong magnetic field and with increasing non-uniformity of the micro channel. The information of current investigation will be instrumental in the development of smart magneto-peristaltic pumps in certain thermal and drug delivery phenomenon., (© 2022. The Author(s).)

This study aimed to evaluate the awareness of organ transplantation and willingness to donate among Saudi Health Colleges students and the impact of gender, year of study, and field of specialization on this. This is a cross-sectional survey-based study. The survey was distributed to all the students attending the annual national conference of Saudi Health Colleges students held in 2018. The survey had two parts. The first part collected the information about gender, university, college of specialization, and year of study. The second part asked 10 questions, seven of which were about the types, causes, treatment of organ failure (awareness questions), and three of which were about their willingness to donate (altruism questions). The participants had three response options: "Yes", "No" and "I don't know. Descriptive statistics (mean, standard) and the frequencies were generated for each parameter. Categorical data were compared using Chi-square and continuous data using an independent t-test or paired t-test. A total of 821 respondents completed the questionnaire; 58.1% were female, 41.3% studying medicine, 25.1% applied medical sciences, 12.7% pharmacy, 9.6% dentistry, and 4.5% nursing 4.5%. The overall awareness of the correct responses constituted 60.4% while 12.3 % gave incorrect responses and 27.3% did not know what the answers were. The highest awareness score was about the concept of brain death (86.4%). The overall awareness score was significantly higher than the altruism score (62.7% and 45.7% respectively (P = 0.0001). Female respondents proved more aware than the male respondents in all the questions did. However, the differences reached the significant levels in four of the ten questions. If we split and summate the responses into "awareness" questions and "altruism" questions, we find that, although female students score higher in both categories, this reaches the significant level for the altruism score (59.90% vs. 45.60% (P = 0.0001). Final year students were significantly more aware than the freshmen in seven of the 10 questions posed with the biggest gap seen in the awareness that Islamic Sharia permits donating organs after death (82.3% vs. 49.6% (P = 0.0001). When we compare of responses by the college, we find that significant differences between the College of Medicine students and applied medical sciences in two questions with the former having a higher awareness score. The overall awareness score was significantly higher than the altruism score (62.7% and 45.7% respectively). Female students have higher altruistic score than male students. The scores are significantly higher in the senior students than in the junior ones., Competing Interests: None declared.