User profiles for David Roll

David Roll

Professor Emeritus of Biological Chemistry, Roberts Wesleyan College
Verified email at roberts.edu
Cited by 908

Trace conditioning with X-rays as an aversive stimulus

JC Smith, DL Roll - Psychonomic Science, 1967 - Springer
An aversion to saccharin flavored water (.1%) was conditioned in male albino rats using X-rays
as the noxious stimulus. The time interval between CS (saccharin) and US (X-ray) was …

[BOOK][B] The Hopkins Touch: Harry Hopkins and the Forging of the Alliance to Defeat Hitler

DL Roll - 2012 - books.google.com
The Hopkins Touch offers the first portrait in over two decades of the most powerful man in
Roosevelt's administration. David Roll shows how Harry Hopkins, an Iowa-born social worker …

Electrochemical and laser deposition of silver for use in metal-enhanced fluorescence

CD Geddes, A Parfenov, D Roll, J Fang, JR Lakowicz - Langmuir, 2003 - ACS Publications
We describe two reagentless methods of silver deposition for metal-enhanced fluorescence.
Silver was deposited on glass positioned between two silver electrodes with a constant …

A comparison of the effects of two prompt-fading strategies on skill acquisition in children with autism spectrum disorders

M Cengher, K Shamoun, P Moss, D Roll… - Behavior Analysis in …, 2016 - Springer
Research has demonstrated that most-to-least (MTL) and least-to-most (LTM) prompting are
effective in helping children with Autism Spectrum Disorders acquire a variety of new skills. …

Silver fractal-like structures for metal-enhanced fluorescence: Enhanced fluorescence intensities and increased probe photostabilities

CD Geddes, A Parfenov, D Roll, I Gryczynski… - Journal of …, 2003 - Springer
Substantial increases in fluorescence emission from fluorophore-protein–coated fractal-like
silver structures have been observed. We review two methods for silver fractal structure …

Metallic colloid wavelength-ratiometric scattering sensors

D Roll, J Malicka, I Gryczynski, Z Gryczynski… - Analytical …, 2003 - ACS Publications
Gold and silver colloids display strong colors as a result of electron oscillations induced by
incident light, which are referred to as the plasmon absorption. This absorption is dependent …

Impact of medical scribes in primary care on productivity, face-to-face time, and patient comfort

L Zallman, K Finnegan, D Roll… - The Journal of the …, 2018 - Am Board Family Med
Background: Medical scribes are a clinical innovation increasingly being used in primary care.
The impact of scribes in primary care remain unclear. We aimed to examine the impact of …

[BOOK][B] Louis Johnson and the arming of America: The Roosevelt and Truman years

KD McFarland, DL Roll - 2005 - books.google.com
" Without question this is an important new addition to World War II and Cold War historiography....
Highly recommended."--Douglas Brinkley, author of Dean Acheson: The Cold War …

Effects of a trauma‐informed mindful recovery program on comorbid pain, anxiety, and substance use during primary care buprenorphine treatment: A proof‐of …

…, A Fredericksen, A Oxnard, D Roll… - … American Journal on …, 2023 - Wiley Online Library
Background A mindfulness‐based intervention that reduces comorbid pain, anxiety, and
substance use during office‐based opioid treatment (OBOT) could enhance retention and …

Feasibility and acceptability of mindful recovery opioid use care continuum (M-ROCC): A concurrent mixed methods study

…, F Samawi, AK Fredericksen, D Roll… - Journal of substance …, 2021 - Elsevier
As opioid overdose deaths increase, buprenorphine/naloxone (B/N) treatment is expanding,
yet almost half of patients are not retained in B/N treatment. Mindfulness-based …