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Ma, Xiaofeng; Sun, Rui; Cheng, Jinghui; Liu, Jiaoyan; Gou, Fei; Xiang, Haifeng; Zhou, Xiangge – Journal of Chemical Education, 2016
A laboratory experiment visually exploring two opposite basic principles of fluorescence of aggregation-caused quenching (ACQ) and aggregation-induced emission (AIE) is demonstrated. The students would prepared two salicylaldehyde-based Schiff bases through a simple one-pot condensation reaction of one equiv of 1,2-diamine with 2 equiv of…
Descriptors: Science Instruction, Undergraduate Study, College Science, Chemistry
Ma, Yan-Zi; Jia, Li; Ma, Kai-Guo; Wang, Hai-Hong; Jing, Xi-Ping – Journal of Chemical Education, 2017
An integrated and inquiry-based experiment on solid state chemistry is applied to an inorganic chemistry lab course to provide insight into the characteristics of the solid phase reaction. In this experiment, students have the opportunity to synthesize long-lasting phosphors with formula xSrO·yAl[subscript 2]O[subscript 3]:Eu[superscript 2+],…
Descriptors: Undergraduate Students, Science Instruction, Inorganic Chemistry, Science Experiments
Cherrette, Vivien L.; Hutcherson, Connor J.; Barnett, Jeremy L.; So, Monica C. – Journal of Chemical Education, 2018
Perovskite solar cells have garnered exponential research interest due to their facile fabrication, solution processability, and low cost. However, there have been limited efforts to integrate this class of materials into the undergraduate laboratory curriculum. Therefore, we designed an integrated laboratory experiment in our upper-division…
Descriptors: Laboratory Experiments, Learning Experience, Integrated Activities, Undergraduate Students
Hootman, Katie C.; Guertin, Kristin A.; Cassano, Patricia A. – Journal of American College Health, 2017
Objective: We investigated predictors of weight gain in college freshmen. Participants: A longitudinal cohort study followed a representative sample of freshmen (N = 264) from 8/2011 to 6/2012. Methods: Repeated measurements of anthropometry, dual-energy X-ray absorptiometry (DXA), physical activity, and diet were collected. We investigated…
Descriptors: College Freshmen, Body Weight, Body Composition, Human Body
Menneer, Tamaryn; Stroud, Michael J.; Cave, Kyle R.; Li, Xingshan; Godwin, Hayward J.; Liversedge, Simon P.; Donnelly, Nick – Journal of Experimental Psychology: Applied, 2012
Searching simultaneously for metal threats (guns and knives) and improvised explosive devices (IEDs) in X-ray images is less effective than 2 independent single-target searches, 1 for metal threats and 1 for IEDs. The goals of this study were to (a) replicate this dual-target cost for categorical targets and to determine whether the cost remains…
Descriptors: National Security, Visual Perception, Eye Movements, Reaction Time
Rieger, Tobias; Heilmann, Lydia; Manzey, Dietrich – Cognitive Research: Principles and Implications, 2021
Visual inspection of luggage using X-ray technology at airports is a time-sensitive task that is often supported by automated systems to increase performance and reduce workload. The present study evaluated how time pressure and automation support influence visual search behavior and performance in a simulated luggage screening task. Moreover, we…
Descriptors: Time Management, Travel, Air Transportation, Task Analysis
Warner, Terence E.; Klokker, Mads Galsgaard; Nielsen, Ulla Gro – Journal of Chemical Education, 2017
Zeolite Y has an iconic crystal structure, but more importantly, the hydrogen modification zeolite H-Y is the classic example of a solid acid which is used extensively as a catalyst in the oil industry. This metastable compound cannot be synthesized directly, which creates an opportunity to discuss various preparative strategies with the students,…
Descriptors: Undergraduate Study, Inorganic Chemistry, Scientific Concepts, Science Instruction
Thananatthanachon, Todsapon – Journal of Chemical Education, 2016
In this experiment, the students explore the synthesis of a crystalline solid-state material, barium zirconate (BaZrO3) by two different synthetic methods: (a) the wet chemical method using BaCl[subscript 2]·2H[subscript 2]O and ZrOCl[subscript 2]·8H[subscript 2]O as the precursors, and (b) the solid-state reaction from BaCO[subscript 3] and…
Descriptors: Inorganic Chemistry, Synthesis, Laboratory Experiments, Scientific Methodology
Rong, Panying; Green, Jordan R. – Journal of Speech, Language, and Hearing Research, 2019
Purpose: Motor neuron diseases, such as amyotrophic lateral sclerosis (ALS), have a devastating effect on speech muscle function that often results in severe communication deficits. Over the course of bulbar disease, tongue and jaw movements are modified, but their impact on speech is poorly understood. The aim of this study was to determine the…
Descriptors: Diseases, Psychomotor Skills, Neurological Impairments, Human Body
Ojo, John Sunday – International Journal of Educational Administration and Policy Studies, 2014
Intergovernmental relation is a necessary political tool for mutual intertwines among the levels of government for the realization and facilitation of government goals and objectives. Intergovernmental wrangling has been a morphological characteristic of Nigerian federalism. The 1999 Nigerian constitution stipulates unequivocal and unambiguous…
Descriptors: Foreign Countries, Governance, Federal State Relationship, Conflict Resolution
Polyak, Steven – Teaching Science, 2014
Modern drug discovery programs require the contribution of researchers in a number of specialist areas. One of these areas is structural biology. Using X-ray crystallography, the molecular basis of how a drug binds to its biological target and exerts its mode of action can be defined. For example, a drug that binds into the active site of an…
Descriptors: Biology, Guides, Molecular Biology, Physical Sciences
Pan, Yi; Li, Yue Ru; Zhao, Yu; Akins, Daniel L. – Journal of Chemical Education, 2015
A research project for senior undergraduates of chemistry has been developed to introduce syntheses of a series of monodispersed semiconductor PbS quantum dots (QDs) and their characterization methodologies. In this paper, we report the preparation of monodispersed semiconductor PbS QDs with sizes smaller than the exciton Bohr radius using a…
Descriptors: Synthesis, Quantum Mechanics, Case Studies, Undergraduate Students
Hazen, Jeffery L.; Cleary, David A. – Journal of Chemical Education, 2014
Precipitation of barium phosphate from aqueous solutions of a barium salt and a phosphate salt forms the basis for a number of conclusions drawn in general chemistry. For example, the formation of a solid white precipitate is offered as evidence that barium phosphate is insoluble. Furthermore, analysis of the supernatant is used to illustrate the…
Descriptors: Science Instruction, Chemistry, Science Curriculum, Scientific Principles
Poeylaut-Palena, Andres, A.; de los Angeles Laborde, Maria – Biochemistry and Molecular Biology Education, 2013
A learning module for molecular level analysis of protein structure and ligand/drug interaction through the visualization of X-ray diffraction is presented. Using DeepView as molecular model visualization software, students learn about the general concepts of protein structure. This Biochemistry classroom exercise is designed to be carried out by…
Descriptors: Introductory Courses, Class Activities, Molecular Structure, Science Activities
Shivalingaswamy, T.; Kagali, B. A. – Physics Education, 2011
In deducing the change of wavelength of x-rays scattered by atomic electrons, one normally makes use of relativistic kinematics for electrons. However, recoiling energies of the electrons are of the order of a few keV which is less than 0.2% of their rest energies. Hence the authors may ask whether relativistic formulae are really necessary. In…
Descriptors: Mechanics (Physics), Motion, Physics, Scientific Concepts