@article{annis_campbell_knopp_king_2018, title={Christiansen filter effect with undyed cellulose triacetate fabric as a scattering agent}, volume={134}, ISSN={["1478-4408"]}, DOI={10.1111/cote.12324}, abstractNote={Light transmission through multiple sheets of undyed cellulose triacetate fabric immersed in binary solutions of carbon disulfide and n‐heptane has been measured using ordinary absorption spectroscopy. The optical transmission of light in the visible spectral range is found to be very high at wavelengths corresponding to a match between the index of refraction of cellulose triacetate and that of the surrounding solution. This phenomenon is commonly referred to as the Christiansen colour filter effect. Indices of refraction of cellulose triacetate from 400 to 700 nm were derived from these data.}, number={2}, journal={COLORATION TECHNOLOGY}, author={Annis, Patricia Anne and Campbell, Jacqueline Heather and Knopp, James Arthur and King, Allen Dupree, Jr.}, year={2018}, month={Apr}, pages={106–110} }
 @article{yu_brewer_leonas_knopp_annis_2018, title={Evaluation of a robotic transfer replicator: machine parameters that affect measurements of transfer of particulates from carpet surfaces to human skin versus human skin-like surfaces}, volume={88}, ISSN={["1746-7748"]}, DOI={10.1177/0040517517718191}, abstractNote={ We have designed and built a robotic machine (robotic transfer replicator) to replicate the process by which various particulates are transferred from carpet surfaces to human skin. The particulates tested included bovine serum albumin, dust mites, paint dust, pesticides, and pollen. We have investigated the effect of time of transfer, applied pressure, skin-like receptor materials, particulate size, carpet composition and construction, and motion of the receptors on the percent transfer. The amount transferred was determined to be directly proportional to the amount of particulate applied to the carpet surface. The percent transfer values ranged from 0.05% to 28% for different combinations of particulates, carpet types, and method of transfer. The percent transfer was shown to be independent of receptor size or applied pressure. To explain the variations in the percent transfer, a three-zone model for particulate penetration into carpets is proposed. While the robotic transfer replicator was not capable of reproducing exactly the results from human finger transfer, it does provide a controlled and reproducible approach to the transfer process and the ability to use toxic or pathogenic materials that could not be used with human subjects. }, number={19}, journal={TEXTILE RESEARCH JOURNAL}, author={Yu, Hong and Brewer, Mary Sue and Leonas, Karen K. and Knopp, James A. and Annis, Patricia A.}, year={2018}, month={Oct}, pages={2234–2249} }
 @article{annis_campbell_matsukura_senentz_knopp_king_2014, title={Determination of kinetic and thermodynamic aspects of cellulose triacetate dyeing using matching-index-ofrefraction absorption spectroscopy}, volume={130}, ISSN={["1478-4408"]}, DOI={10.1111/cote.12082}, abstractNote={A simple method of analysis is described in which ordinary absorption spectroscopy is employed to measure dye content within cellulose triacetate fibres in order to determine the rate of dyeing for triacetate fabric immersed in infinite dyebaths at various temperatures. The results are analysed to yield values for the activation energy and enthalpy change associated with the transfer of a dye, Disperse Red 13, from a saturated dyebath to the interior of triacetate fibres immersed in that bath.}, number={3}, journal={COLORATION TECHNOLOGY}, author={Annis, Patricia A. and Campbell, Jacqueline H. and Matsukura, Ayano and Senentz, Amanda and Knopp, James A. and King, Allen D., Jr.}, year={2014}, month={Jun}, pages={180–184} }
 @book{hardin_ascencio-ibaanez_knopp_2013, title={Experimental biochemistry: Theory, experiment, analysis and reporting}, publisher={Dubuque, Iowa: Kendall Hunt}, author={Hardin, C. and Ascencio-Ibaanez, T. and Knopp, J.}, year={2013} }
 @article{annis_campbell_knopp_king_2011, title={Determination of light transmission through multiple sheets of cellulose triacetate using ordinary absorption spectroscopy}, volume={127}, ISSN={["1472-3581"]}, DOI={10.1111/j.1478-4408.2010.00272.x}, abstractNote={Ordinary optical absorption spectroscopy is used to assess the effects of reflection, scattering and optical absorption on light beams passing through sheets of cellulose triacetate fabric. The attenuation of light transmitted through multiple sheets of undyed fabric is analysed using a model that incorporates the concepts of reflection and turbidity. The attenuation of light by sheets of dyed fabric under conditions of significant light scattering is analysed using the model cited above. The results obtained under conditions of significant light scattering yield optical absorbance values for dye molecules incorporated in the fabric that correspond exactly with the absorbance values measured under conditions of total transparency, which is achieved using matching index of refraction spectroscopy.}, number={1}, journal={COLORATION TECHNOLOGY}, author={Annis, Patricia A. and Campbell, Jacqueline H. and Knopp, James A. and King, Allen D., Jr.}, year={2011}, pages={1–9} }