A Cost-Effective Microfluidic Device to Teach the Principles of Electrophoresis and Electroosmosis.

Electrophoresis is integral to analytical and biochemistry experiences in undergraduate education; however, fundamental principles of the method are often taught in upper-level laboratories through hands-on experiences. A laboratory activity is reported that teaches the concepts of electrophoretic mobility and electroosmotic flow. A single reuseable instrument, called a mini-E, costs 37 USD and consists of a DC power supply, a voltmeter, platinum electrodes, and a chip cast in polydimethylsiloxane. This activity uses common reagents costing only 0.02 USD per student. Experiments are devised that allow students to investigate the properties of electrophoretic flow and electroosmotic flow by separating the two commonly used food dyeing agents Brilliant Blue FCF and Allura Red AC in vinegar and in a solution of ammonium hydroxide. A dark-purple mixture of these dyes is separated into red and blue bands that are easily visualized. The migration order of the dyes differs when the separation is performed under conditions of reversed polarity and suppressed electroosmotic flow (vinegar) compared to conditions of normal polarity and active electroosmotic flow (ammonium hydroxide). When delivered to chemistry majors, students had a significant gain in their ability to apply the concepts of electroosmosis and electrophoresis to predict analyte migration. Although this activity targets upper-level chemistry content, it can also be adapted for other laboratory experiences.

Gender Differences of Endowed Professorship in Obstetrics and Gynecology Departments at Top Academic Institutions.

Background: Gender equity is a critical issue in academic medicine. Whether there is equitable access to the prestige and resources of endowed professorships merits evaluation. We investigated this question in obstetrics and gynecology, a field that focuses on the health of women and in which women are much better represented than other specialties of medicine. Materials and Methods: We compiled a list of the top 25 United States departments of obstetrics and gynecology and contacted department chairs (and used department websites) to obtain lists of faculty and their positions. Scopus, department websites, and National Institutes of Health (NIH) RePORTER were used to collect h-Index, number of publications and citations, graduation year, degrees, gender, and NIH-funding. We conducted a bivariate comparison of endowed professorship attainment by gender using a chi-square test and created a multiple variable regression model. Results: Of the 680 obstetrics and gynecology faculty across 23 departments that had endowed chairs, 64 out of 400 women (16%) and 66 out of 280 men (24%) held endowed chairs (p = 0.01). The multivariable model suggested no independent gender difference in attainment of an endowed chair after adjusting for covariates. Conclusion: To our knowledge, this study is the first to examine gender as a variable in endowed chair allocation in top obstetrics and gynecology academic departments. Our findings suggest a significant gender difference in the allocation of endowed chairs. That difference is driven by gender differences in academic rank, graduation year, publications, and funding. To promote the intraprofessional equity necessary to optimally advance women's health, further research and intervention are necessary.

Human embryos donated for human embryonic stem cell derivation.

Human embryonic stem cells (hESCs), produced from human embryos, are demonstrating: utility and promise in disease modeling; enhanced and unique understanding of early events in basic genetic or molecular or cellular or epigenetic development; novel human approaches to pharmaceutical screening; pathways toward the discoveries of disease treatments and cures; and foundational importance for regenerative medicine. The regulatory landscape is rigorous, and rightly so. Here, we discuss the current US federal and state regulatory environment. A unique approach of presenting anonymized embryo donor statements is provided to personalize the decision-making process of human embryo donation for hESC derivation. From the uses of preimplantation genetic-tested and affected human embryos to derived disease-specific hESCs, one can glean the much needed information on early human genetics and developmental biology, which are presented here. Finally, we discuss the future uses of hESCs, and other pluripotent stem cells, in general and reproductive medicine.

A note on the use of rank-ordered logit models for ordered response categories.

Models for rankings have been shown to produce more efficient estimators than comparable models for first/top choices. The discussions and applications of these models typically only consider unordered alternatives. But these models can be usefully adapted to the case where a respondent ranks a set of ordered alternatives that are ordered response categories. This paper proposes eliciting a rank order that is consistent with the ordering of the response categories, and then modelling the observed rankings using a variant of the rank ordered logit model where the distribution of rankings has been truncated to the set of admissible rankings. This results in lower standard errors in comparison to when only a single top category is selected by the respondents. And the restrictions on the set of admissible rankings reduces the number of decisions needed to be made by respondents in comparison to ranking a set of unordered alternatives. Simulation studies and application examples featuring models based on a stereotype regression model and a rating scale item response model are provided to demonstrate the utility of this approach.

A Low-Cost and Simple Demonstration of Freezing Point Depression and Colligative Properties with Common Salts and Ice Cream.

A laboratory activity was developed to teach freezing point depression and colligative properties to introductory-level chemistry students. The laboratory uses food-grade reagents and is delivered in two units that can be taught in a single 2 hour session or two separate sessions. The total cost of the consumables is 1 USD. In the first part of this two-part activity, students perform measurements on the properties of five salt solutions to better know and understand freezing point depression. In the second part of the activity, students apply their knowledge and understanding of freezing point depression to make ice cream. The ice-cream-making experiment is delivered as a group activity to encourage reflection. Centering this experiment on ice cream allows students to connect properties described in chemistry to everyday life. The solutions used in the experiment are reusable and nonhazardous. The experiment can be implemented in a classroom, in a teaching laboratory, or at home.

Formal Reporting of Identity-Based Harassment at an Academic Medical Center: Incidence, Barriers, and Institutional Responses.

PURPOSE: To examine the incidence of, barriers to, and institutional responses to formal reporting of experiences of identity-based harassment at an academic medical center. METHOD: The authors invited 4,545 faculty and medical trainees at the University of Michigan Medical School to participate in a 2018 survey about civility and respect. This analysis focused on respondents who indicated experiencing at least 1 form of identity-based harassment (sexual harassment, gender policing harassment, heterosexist harassment, racialized sexual harassment) within the past year, perpetrated by staff, students, and faculty or by patients and patients' families. The authors assessed the incidence of formally reporting harassment to someone in authority, barriers to reporting, and institutional responses following reporting. RESULTS: Among the 1,288 (28.3%) respondents with usable data, 83.9% (n = 1,080) indicated experiencing harassment. Of the harassed individuals, 10.7% (114/1,067), including 13.1% (79/603) of cisgender women and 7.5% (35/464) of cisgender men, indicated they formally reported their harassment experiences. Among these reporters, 84.6% (66/78) of cisgender women and 71.9% (23/32) of cisgender men indicated experiencing positive institutional remedies. Many reporters indicated experiencing institutional minimization (42.9% [33/77] of cisgender women; 53.1% [17/32] of cisgender men) or retaliation (21.8% [17/78] of cisgender women; 43.8% [14/32] of cisgender men). Cisgender men were significantly more likely to indicate experiencing specific negative institutional responses, such as being considered a troublemaker (OR 3.56, 95% CI: 1.33-9.55). Among respondents who did not formally report harassment experiences, cisgender women were significantly more likely to cite concerns about institutional retaliation, such as being given an unfair performance evaluation or grade (OR 1.90, 95% CI: 1.33-2.70). CONCLUSIONS: Most respondents who experienced harassment did not formally report it to anyone in authority. Many reporters faced institutional minimization and retaliation. These findings suggest a need to reshape institutional harassment prevention and response systems in academic medicine.

An investigation of kV mini-GRID spatially fractionated radiation therapy: dosimetry and preclinical trial.

Objective. To develop and characterize novel methods of extreme spatially fractionated kV radiation therapy (including mini-GRID therapy) and to evaluate efficacy in the context of a pre-clinical mouse study.Approach. Spatially fractionated GRIDs were precision-milled from 3 mm thick lead sheets compatible with mounting on a 225 kVp small animal irradiator (X-Rad). Three pencil-beam GRIDs created arrays of 1 mm diameter beams, and three 'bar' GRIDs created 1 × 20 mm rectangular fields. GRIDs projected 20 × 20 mm2fields at isocenter, and beamlets were spaced at 1, 1.25, and 1.5 mm, respectively. Peak-to-valley ratios and dose distributions were evaluated with Gafchromic film. Syngeneic transplant tumors were induced by intramuscular injection of a soft tissue sarcoma cell line into the gastrocnemius muscle of C57BL/6 mice. Tumor-bearing mice were randomized to four groups: unirradiated control, conventional irradiation of entire tumor, GRID therapy, and hemi-irradiation (half-beam block, 50% tumor volume treated). All irradiated mice received a single fraction of 15 Gy.Results. High peak-to-valley ratios were achieved (bar GRIDs: 11.9 ± 0.9, 13.6 ± 0.4, 13.8 ± 0.5; pencil-beam GRIDs: 18.7 ± 0.6, 26.3 ± 1.5, 31.0 ± 3.3). Pencil-beam GRIDs could theoretically spare more intra-tumor immune cells than bar GRIDs, but they treat less tumor tissue (3%-4% versus 19%-23% area receiving 90% prescription, respectively). Bar GRID and hemi-irradiation treatments significantly delayed tumor growth (P < 0.05), but not as much as a conventional treatment (P < 0.001). No significant difference was found in tumor growth delay between GRID and hemi-irradiation.Significance. High peak-to-valley ratios were achieved with kV grids: two-to-five times higher than values reported in literature for MV grids. GRID irradiation and hemi-irradiation delayed tumor growth, but neither was as effective as conventional whole tumor uniform dose treatment. Single fraction GRID therapy could not initiate an anti-cancer immune response strong enough to match conventional RT outcomes, but follow-up studies will evaluate the combination of mini-GRID with immune checkpoint blockade.

Estimation of the strength of mate preference from mated pairs observed in the wild.

A number of key processes in evolution are driven by individuals preferring mates with particular phenotypes. However, despite long-standing interest, it is difficult to quantify the strength of mate preference from phenotypic observations in nature in a way that connects directly to key parameters in theoretical models. To bridge the gap between mathematical models and empirical data, we develop a novel maximum likelihood-based method to estimate the strength and form of mate preference, where preference depends on traits expressed in both males and females. Using simulated data, we demonstrate that our method accurately infers model parameters, including the strength of mate preference and the optimal offset match between trait values in mated pairs when model assumptions are satisfied. Applying our method to two previous studies of assortative mating in marine gastropods and the European common frog, we support previous findings, but also give additional insight into the role of mate preference in each system. Our method can be generalized to a variety of plant and animal taxa that exhibit mating preferences to facilitate the testing of evolutionary hypotheses and link empirical data to theoretical models of assortative mating, sexual selection, and speciation.

Negative perceptions and emotional impact of striae gravidarum among pregnant women.

BACKGROUND: The impact of striae gravidarum (SG), or stretch marks of pregnancy, on quality of life (QoL) is unclear. OBJECTIVE: The purpose of this study was to investigate how SG affect QoL in pregnant women. METHODS: In this cross-sectional survey study of healthy pregnant women who developed SG during their current pregnancy, we asked about the impact of lesions on emotional, psychological, and life-quality facets. Spearman product-moment correlation coefficients were generated to determine the strength of relationships between variables. RESULTS: We analyzed 116 valid surveys. Participants reported permanency of SG as the top physical concern (n = 87; 75%). With regard to severity, nearly three-quarters of participants rated their lesions as very prominent (n = 24; 21%) or moderate (n = 57; 49%). Among the life-quality facets queried, embarrassment/self-consciousness was the most frequently associated with SG, with over one-third of participants reporting "a lot" (n = 19; 16%) or a "moderate" (n = 26; 22%) amount of embarrassment/self-consciousness related to having SG. Lesion severity significantly correlated with the degree of embarrassment/self-consciousness (r = .543), as well as the impact of SG on other life-quality facets, including overall QoL (r = .428), clothing choice (r = .423), self-image/self-esteem (r = .417), feelings of anxiety/depression (r = .415), and social activities (r = .313; all p ≤ .001). Nearly one-quarter of participants believed that emotional distress related to SG was similar or greater than that caused by other skin problems, such as acne, psoriasis, or eczema. CONCLUSION: SG can be associated with a host of negative reactions reflecting increased psychological and emotional distress, including embarrassment and decreased QoL. These consequences may compound the emotional stress of pregnancy, potentially warranting psychological support and adjustment strategies.

Incidence and Group Comparisons of Harassment Based on Gender, LGBTQ+ Identity, and Race at an Academic Medical Center.

Background: A key recommendation from the landmark National Academies report called for research examining experiences of underrepresented and/or vulnerable groups, including people of color and sexual- and gender-minority people. We examine the prevalence of gender policing harassment (GPH), heterosexist harassment (HH), and racialized sexual harassment (RSH), by gender, LGBTQ+, race, and department grouping, which has not been previously examined in academic medicine. Materials and Methods: All faculty (n = 2723), fellows, residents, and first through third year medical students (n = 1822) at the University of Michigan Medical School (UMMS) who had been working at the organization for at least 1 year were invited to complete a 20-minute online survey. We assessed harassment within the past year, perpetrated by insiders (i.e., staff, students, and faculty) and from patients and patients' families. Results: A total of 705 faculty (25.9% of the targeted sample) and 583 trainees (32.0% of the targeted sample) were in the analytic sample. Women were significantly more likely to experience GPH from both sources than men, and LGBTQ+ individuals were more likely to face HH from both sources than cisgender heterosexual participants. Underrepresented minorities, Asian/Asian American, and female participants had higher rates of RSH perpetrated by insiders. There were significant department-group differences across harassment types. Conclusions: Less-studied forms of harassment are common within academic medicine and are perpetrated from various sources. Identity-based harassment should be investigated further to gain a comprehensive understanding of its impact within academic medicine. Clinical Trial Registration Number not applicable.

Gynecologic Oncology Sub-Specialty Training in Ghana: A Model for Sustainable Impact on Gynecologic Cancer Care in Sub-Saharan Africa.

African women have double the risk of dying from cancer than women in high-income countries. In Ghana, most women with gynecological malignancies present with advanced-stage disease when treatment is less effective. Barriers to improved cancer outcomes include the availability of cancer screening, affordability of treatment, and access to gynecologic oncology specialists. In response to a paucity of gynecologic oncology providers, an in-country fellowship training program was established at Komfo Anokye Teaching Hospital (KATH) in 2013. Historically, Ghanaian resident physicians were sent to other countries for fellowship training and were unlikely to repatriate. The establishment of an in-country training program not only addresses the challenge of "brain drain," but also builds local capacity in gynecologic oncology education and emphasizes culturally relevant and accessible healthcare. The four-years gynecologic oncology fellowship program at KATH was developed as part of a longitudinal multi-decade partnership between the University of Michigan and academic medical centers in Ghana. The fellowship trains obstetricians and gynecologists to provide subspecialist clinical and surgical care to patients with gynecologic malignancies. Fellows collaborate with the radiation, oncology and pathology departments, participate in monthly inter-institutional tumor board meetings, conduct research, advise on health policy issues, and train subsequent cohorts. This fellowship is representative of emerging twenty-first-century trends in which subspecialty training programs in low-income countries are strengthened by international collaborations. Providing specialized training in gynecologic oncology can help develop and maintain resources that will improve clinical outcomes for women in low-resources settings.

Galvanizing for the future: a bottom-up departmental approach to diversity, equity, and inclusion.

As an academic department, we sought to identify effective strategies to engage our faculty and staff in diversity, equity, and inclusion initiatives and programs to build an inclusive department that would address our needs and those of our community and partners. Over a 4-year period, our faculty and staff have participated in town hall meetings, focus group discussions, surveys, and community-building activities to foster stakeholder engagement that will build a leading academic department for the future. We noted that our faculty and staff were committed to building diversity, equity, and inclusion, and our mission and vision were reflective of this. However, communication and transparency may be improved to help support a more inclusive department for all. In the future, we hope to continue with the integration of diversity, equity, and inclusion into our department's business processes to achieve meaningful, sustained change and impact through continued focus on recruitment, selection, retention, development, and wellness of faculty and staff-in addition to the continued recruitment of faculty and staff from underrepresented minority groups. Our findings should serve as a call to action for other academic obstetrics and gynecology departments to improve the health and well-being of the individuals we serve.

Embedding international medical student electives within a 30-year partnership: the Ghana-Michigan collaboration.

BACKGROUND: Global health experiences are an increasingly popular component of medical student curricula. There is little research on the impact of international medical electives embedded within long-standing, sustainable partnerships. Our research explores the University of Michigan medical student elective experience in Ghana within the context of the Ghana-Michigan collaborative. METHODS: Study participants are University of Michigan medical students who completed an international elective in Ghana between March 2006 and June 2017. Post-elective reports were completed by students, including a description of the experience, highlights, disappointments, and the impact of the experience on interest in future international work and future practice of medicine. A retrospective thematic analysis of reports was carried out using NVivo 12 (QSR International, Melbourne, Australia). RESULTS: A total of 57 reports were analyzed. Benefits of the elective experience included building cross-cultural relationships, exposure to different healthcare environments, hands-on clinical and surgical experience, and exposure to different patient populations. Ninety-five percent of students planned to engage in additional international work in the future. Students felt that the long-standing bidirectional exchange allowed them to build cross-cultural relationships and be incorporated as a trusted part of the local clinical team. The partnership modeled collaboration, and many students found inspiration for the direction of their own careers. CONCLUSIONS: Embedding clinical rotations within a well-established, sustained partnerships provides valuable experiences for trainees by modeling reciprocity, program management by local physicians, and cultural humility-all of which can help prepare learners to ethically engage in balanced, long-term partnerships in the future.

#MedToo: A Large-Scale Examination of the Incidence and Impact of Sexual Harassment of Physicians and Other Faculty at an Academic Medical Center.

Background: A landmark National Academies report highlighted the need for rigorous evaluation of sexual harassment in medicine. We examined the prevalence and impact of sexual harassment using the Sexual Experiences Questionnaire, the standard for measurement of sexual harassment, but which has not been previously applied within academic medicine. Materials and Methods: A 20-minute online survey was administered to all faculty who had been working at University of Michigan Medical School for at least 1 year (n = 2723). We assessed sexual harassment within the past year from insiders (i.e., from staff, students, and faculty) and from patients and patients' families. We also evaluated mental health, job satisfaction, sense of safety at work, and turnover intentions. Results: In the final sample (n = 705; which included 25.9% of the originally targeted population), most respondents, 82.5% of women and 65.1% of men, reported at least one incident of sexual harassment from insiders in the past year; 64.4% of women and 44.1% of men reported harassment from patients and patients' families. The most frequently experienced dimension of sexual harassment for women and men was sexist gender harassment. Increased experiences of harassment were independently associated with lower mental health, job satisfaction, and sense of safety at work, as well as increased turnover intentions, with no significant interactions by gender. Conclusions: Sexual harassment against medical faculty is alarmingly common at an institution that is not expected to be atypical. Interventions must address sexual harassment, which affects mental health and career outcomes of male and female physicians.