We live in a world marked by a crisis that we understand, from post-colonial literature, as a crisis of the knowledge model that underpins Western Modernity. Therefore, science education which deals with the study of the production of scientific knowledge needs to be attentive to this question. We argue that the challenges imposed by the crisis…

A derivation of the conservation equations for fixed bed tubular reactors in cylindrical coordinates is presented and a differential operator for the substantial derivative in porous beds is introduced. The emphasis on the distinction between the functions of the void and volume fractions in the derivation of the conservation equations sets the…

In the environment, communication among microorganisms is a key aspect of their lives. Through communication, single cells of a microbial population can coordinate their gene expression and, in consequence, their physiology. Quorum sensing systems (QS) are one of these mechanisms that allow this communication through the production and detection…

This work gathers in one place what is pertinent about the connections between metric coefficients, basis- and unit vectors in a four-dimensional relativistic manifold. Some of this material can be found scattered elsewhere; its collection into one place reveals connections that either are not known or are obscure, for example that the metric…

Significant figures in a measurement are all the digits known plus one more digit that is uncertain or estimated. The problem addressed by this study is inconsistencies in the instruction of significant figures in high school chemistry. This study examined teacher experience as related to the teaching of significant figures. The individuals…

This paper describes a data set of IR, MS, H-1 NMR, C-13 NMR, DEPT, and 2D NMR spectra designed for undergraduate teaching. The data files are provided as MestReNova documents containing all the available spectra for each of the 251 different compounds in the data set. The spectral data in these files can be processed, manipulated, copied, and…

An exciting recent development in chemistry has been the ability to control nanoparticle crystal morphology or shape. Nanoparticles of different shapes present different crystal surfaces (or facets) with respect to the surrounding environment. Synthetic control over nanoparticle morphology has enabled the study of the influence of surface facets…

At-home chemistry experiments are increasingly important to enable high-quality online and hybrid instruction. These class modalities provide significant challenges and also dramatically expand the accessibility of education to those who work or care for family during traditional school hours or have significant commutes to campus. This work…

Gamification of learning in chemistry education is a growing field. Chemistry themed escape room activities, incorporating course learning objectives into puzzle solution, have become a popular tool allowing for students to apply course knowledge in novel settings. Escape room activities, like their public counterparts, provide subtle guidance to…

Reactions between metal carbonates from d[superscript 5] to d[superscript 10] systems and glutamic acid are used to obtain molecular metal complexes and metal-organic frameworks (MOFs). When the ligand is an amino acid, these MOFs belong to the BioMOF class (metal-organic frameworks for biological and medical applications). The metal carbonates of…

A laboratory experiment in which [superscript 1]H NMR and UV-vis spectroscopies are applied to probe the temperature dependence of a monomer-dimer equilibrium involving a cyclopentadienone derivative is described and discussed. Details of the data analysis for extraction of equilibrium constants from the raw experimental data from both techniques…

Inquiry-based teaching is the most widespread approach in science education worldwide. However, in Peru, this model became better known since the latest curriculum reform in 2016, which proposed implementing that teaching approach at all levels of schooling. Since then, no literature review has been conducted on the status quo of implementing…

The ability to reason with representations is pivotal for successful learning in Organic Chemistry and is closely linked to representational competence. Given the visual nature of this discipline, this comprises competency in extracting and processing relevant visual information. With regard to the resonance concept, proficiency in identifying…

Lidar remote sensing, which uses laser pulses to measure three-dimensional structure, has become essential across natural science disciplines. However, undergraduate students typically receive limited, if any, exposure to this technology and rarely have opportunities to experience it. Experiential and multi-modal courses may be ideal for…

For many years, hegemonic approaches to teaching the nature of science (NOS) have focused mainly on understanding some epistemic (i.e., rational, or cognitive) aspects involved in the construction of science. So, aspects of a non-epistemic (i.e., non-rational, contextual, or extra-scientific) nature have been practically neglected in these…