A procedure to purify anthocyanin, a natural pigment, following a green approach by using macroporous resin and its encapsulation for the maintenance of its stability is described. This laboratory experiment, which describes the benefits of using resin for the purification, is a learning tool for students working in the field on nutraceuticals.…

The use of molecular models in chemistry and biochemistry classes is very effective in helping students understand covalent bonds and the chemical structure of molecules. However, conventional molecular models cannot represent intermolecular interactions such as hydrogen bonds and electrostatic interactions. Herein, we describe 3D printed…

The area near the electrode surface is called the diffusion layer, and to understand electrochemistry, it is crucial that students have a knowledge of the phenomena occurring at the diffusion layer. Here, we present a demonstration and activity to visualize and analyze the expansion of a micrometer-sized diffusion layer. The electrode process…

This research study investigated conceptions about buoyancy held by 55 elementary preservice teachers enrolled in a science methods course who participated in an instructional intervention designed to increase their knowledge about buoyancy. Pre- and post-concept maps were analyzed using a paired sample t test and thematic analysis was used to…

This paper describes two examples of teaching situations in which the idea of infinity arises, and supports the conclusion that infinity is not a physical reality but a very powerful and useful mathematical device which facilitates modelling and the solution of problems in physics.

Pedigree problems are typical genetics tasks in schools. They are well suited to help students learn scientific reasoning, representing realistic genetic problems. However, pedigree problems also pose complex requirements, especially for secondary students. They require a suitable solution strategy and technical knowledge. In this study, we…

It can be a continual struggle to develop interesting and engaging experiments for use in primary schools, especially when related to electrical phenomena. Most people are familiar with the phenomenon of charged objects picking up paper or attracting hair, but there are number of simple and highly engaging activities within this area that are…

Apurinic/apyrimidinic (AP or abasic) sites are deoxyribonucleic acid (DNA) lesions that result from the loss of a nucleobase by hydrolysis of the "N"-glycosyl bond. AP sites are the most frequent lesions in cells and are caused by environmental and cancer therapeutic genotoxins. Herein, the bicinchoninic colorimetric assay, typically…

Scientific misconceptions are ubiquitous, and in our era of near-instant information exchange, this can be problematic for both public health and the public understanding of scientific topics. Refutation text is one instructional tool for addressing misconceptions and is simple to implement at little cost. We conducted a random-effects…

This study focuses on the relationship between students' use of language resources and their conceptualisation of phenomena in producing scientific explanations in physics. The objectives are to find out if there is a general model that describe the meaning-making process, the extent that this model is applicable to various branches in physics.…

Successful demonstration of lipid assembly chemistry to a general audience can be challenging on both physical (nanoscopic dimensions of lipid assemblies) and intellectual (complex, interconnected concepts) accounts. Quite often, an instructor has to leave key concepts out of what is being offered due to time constraints, which unfortunately…

In 1900, three botanists claimed they had found regularities in inheritance, which soon would be known as Mendel's Laws, without knowing the work of Gregor Mendel or of each other. Their claims of independent (re)discovery have been thoroughly studied during the past decades, with various outcomes. The case is still of interest today as it offers…

This study investigated the stability and persistence of prospective elementary teachers' conceptual understanding of average speed. A questionnaire containing two questions about average speed was administered to the prospective teachers prior to their admission to an elementary science methods course (pretest) and at the end of the course…

This work describes an alternative approach for introducing the concept of pH in high school. We develop an experimental protocol to demonstrate in classroom as pH affects the life of microorganisms. At the same time, we constructed low-cost equipment and a homemade culture media using ordinary products, which they are easily found by the teachers…

The study aims to investigate the effect of STEM applications designed for the atomic system and periodic system unit on the scientific creativity of 9th-grade students. The exploratory sequential design, mixed research, is used in the study. The pretest-posttest quasi-experimental design has been preferred for the quantitative part of the study…