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California State University, East Bay

3 ARTICLES PUBLISHED IN JoVE

Chemistry

An Aptamer-based Sensor for Unchelated Gadolinium(III)

Osafanmwen Edogun¹, Tracy Y. Chan¹, Nghia H. Nguyen¹, Anthony Luu¹, Marlin Halim¹

¹Department of Chemistry and Biochemistry, California State University, East Bay

The use of polydeoxynucleotide (44-mer aptamer) molecules for sensing unchelated gadolinium(III) ion in an aqueous solution is described. The presence of the ion is detected via an increase in the fluorescence emission of the sensor.

Behavior

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

Alexandre Nikolaev¹, Eve Higby^2,3, JungMoon Hyun⁴, Sameer Ashaie^5,6

¹Helsinki Collegium for Advanced Studies, University of Helsinki, ²University of California, Riverside, ³California State University, East Bay, ⁴Hunter College, City University of New York, ⁵Feinberg School of Medicine, Northwestern University, ⁶Shirley Ryan AbilityLab

This article describes how to implement a simple lexical decision experiment to assess written word recognition in neurologically healthy participants and in individuals with dementia and cognitive decline. We also provide a detailed description of reaction time analysis using principal components analysis (PCA) and mixed-effects modeling.

JoVE Journal

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Aleksey A. Kocherzhenko¹, Sapana V. Shedge², Pauline F. Germaux¹, Mohammad Heidarian¹, Christine M. Isborn²

¹Department of Chemistry and Biochemistry, California State University, East Bay, ²Department of Chemistry and Chemical Biology, University of California, Merced

Here, we present a protocol for parametrizing a tight-binding excitonic Hamiltonian for calculating optical absorption spectra and optoelectronic properties of molecular materials from first-principles quantum chemical calculations.