Herein, we describe the design and testing of two different home-built atomic layer deposition (ALD) systems for the growth of thin films with sub-monolayer control over film thickness. The first reactor is a horizontally aligned hot-walled reactor with a vacuum purging system. The second reactor is a vertically aligned cold-walled reactor with a…

Mechanochemical syntheses avoid or considerably reduce the use of reaction solvents, thus providing green chemistry synthetic alternatives that are both environmentally friendly and economically advantageous. The increased solid-state reactivity generated by mechanical energy imparted to the reactants by grinding or milling can offer alternative…

Many single nucleotide polymorphisms (SNPs) have been identified within the "Caenorhabditis elegans" genome. SNPs present in the genomes of two isogenic "C. elegans" strains have been routinely used as a tool in forward genetics to map a mutation to a particular chromosome. This article describes a laboratory exercise in which…

When teaching physics, it is often difficult to get biology-oriented students to see the relevance of physics. A complaint often heard is that biology students are required to take physics for the Medical College Admission Test (MCAT) as part of a "weeding out" process, but that they don't feel like they need physics for biology. Despite…

Hands-on experimentation has widely demonstrated its efficacy in engineering training, especially in control formation, since experimentation using computer-aided control system design (CACSD) tools is essential for future engineers. In this context, this article describes a case study for Control Engineering formation, based on a new lab practice…

Aim/Purpose: This study of affordances in educational technology focuses on how the self-perceptions of teachers influence the creation of educational opportunities and how these are received by learners. Background: It is important to explore the affordances offered by teachers, when using educational technology, from the perspective of their…

Situated learning experiences such as research apprenticeships can help connect girls to the sciences, ultimately helping to achieve gender equity in the science workforce. The material resources available in research apprenticeships--such as research equipment, field gear, etc.--may be particularly consequential for building identification with…

With the reunification of Germany, a Jenaplan School was founded in 1991 in the city of Jena, Thuringia. Since then one place of the city carried Petersen's name. The University School at Jena, refounded by Petersen as Life Community School in 1924 (the traditional purpose as a mere teacher training school goes back to the year 1844) and received…

This communication reports the curriculum changes and how they worked when an upper-level experimental physical chemistry course had to switch from face-to-face to online teaching within a matter of days. Although several of the learning goals of the laboratory-based course could still be met in the online environment, others required…

Due to the lack of qualified agricultural education teachers needed to fill yearly vacancies on the secondary school level, educators at Texas Tech University conducted a longitudinal study concerning how student teachers spend their time during their student teaching experience in an attempt to identify if this time spent has an impact on the…

The idea of a shared place in the universe--a shared history--was embodied in 2019. The heft of the Smithsonian--its unparalleled collections, its diverse and deep-rooted expertise, and its outsized ability to connect with millions of people--is being brought to bear on the most critical issues of all time: conversations about democracy, identity,…

This paper presents three case studies that examined the use of ClassTranscribe in a diverse set of undergraduate engineering classes in 2019 and 2020 at the University of Illinois at Urbana-Champaign. ClassTranscribe, a video viewing system designed with accessibility and learning in mind, was first presented to the ASEE [American Society for…

The authors examined college students' perceptions about their middle school and high school preparation for college science courses as well as what led them to study or not study science in college. Analysis of a survey using mixed methods revealed that the more laboratory techniques students felt proficient in conducting and the more science AP…

Graphene's unique combination of exceptional mechanical, electronic, and thermal properties makes this material a promising candidate to enable next-generation technologies in a wide range of fields, including electronics, energy, and medicine. However, educational activities involving graphene have been limited due to the high expense and…

Surface-enhanced Raman scattering (SERS) studies of art represent an attractive way to introduce undergraduate students to concepts in nanoscience, vibrational spectroscopy, and instrumental analysis. Here, we present an undergraduate analytical or physical chemistry laboratory wherein a combination of normal Raman and SERS spectroscopy is used to…