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You searched on: Topic Area: Biological Physics

Displaying records 1 to 10 of 14 records.
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1. Inhibition of cellular proliferation and enhancement of hydrogen peroxide production in fibrosarcoma cell line by weak radio frequency magnetic fields
Topic: Biological Physics
Published: 9/23/2014
Authors: Pablo Castello, Iain Hill, Lucas Portelli, Frank Barnes, Robert J. Usselman, Carlos Martino
Abstract: This study presents experimental data for the effects of weak radio frequency (RF) magnetic fields on hydrogen peroxide (H2O2) production and cellular growth rates of fibrosarcoma HT1080 cells in vitro. Cells were exposed either to 45mT static magn ...

2. A Candidate Reference Analytical Method for Quantification of Low Concentrations of Plasmid DNA by Exhaustive Counting of Single DNA Molecules in a Flow Stream
Topic: Biological Physics
Published: 8/4/2014
Authors: Hee-Bong Yoo, Dong-Geun Oh, Jae Yong Song, Mamoru Kawaharasaki, Jeeseong Hwang, In Chul Yang, Sang-Ryoul Park
Abstract: This work demonstrates accurate measurement of the concentration of low-level plasmid DNA by counting individual DNA molecules using a high-sensitivity flow cytometric setup. Plasmid DNA is a widely used form of DNA, and its quantity often needs ...

3. A collection and statistical analysis of skin reflectance signatures for inherent variability over the 250 nm to 2500 nm spectral range
Topic: Biological Physics
Published: 6/4/2014
Authors: Catherine C Cooksey, Benjamin K Tsai, David W Allen
Abstract: The spectral reflectance signature of human skin provides opportunities to advance observations ranging from medical treatment to security applications. In this study 28 volunteers participated in a skin reflectance measurement of the inside of the r ...

4. Total free energy governs cell morphology ‹ A possible solution to obtain intrinsic cell modulus
Topic: Biological Physics
Published: 9/26/2013
Authors: Martin Y Chiang, Yanzi Yangben , Nancy J Lin, Li Yang
Abstract: Cells adjust their morphology in response to physical and chemical interactions with their environment. In this report, we deem that the fundamental nature of free energies associated with cell/substrate interactions regulates adherent cell morpholog ...

5. Immobilization of Proteins on Carboxylic Acid-Functionalized Nanopatterns
Topic: Biological Physics
Published: 11/28/2012
Authors: John Peter Ngunjiri, Daniel Joshua Stark, Tian Tian, Kimberly A Briggman, Jayne C Garno
Abstract: The immobilization of proteins on nanopatterned surfaces was investigated using in situ atomic force microscopy (AFM) and ex situ infrared reflectance-absorption spectroscopy (IRAS). The AFM-based lithography technique of nanografting provided contro ...

6. Out-of-plane Stokes imaging polarimeter for early skin cancer diagnosis
Topic: Biological Physics
Published: 7/1/2012
Authors: P. Ghassemi, Paul Lemaillet, Thomas Avery Germer, J. W. Shupp, S. Venna, M. E. Boisvert, K. E. Flanagan, M. H. Jordan, J. C. Ramella-Roman
Abstract: Optimal treatment of skin cancer before it metastasizes depends critically on early diagnosis and treatment. Imaging spectroscopy and polarized remittance have been utilized in the past for diagnostic purposes, but valuable information can be also o ...

7. Tetracysteine-Based Fluorescent Tags to Study Protein Localization and Trafficking in Plasmodium falciparum-Infected Erythrocytes
Topic: Biological Physics
Published: 8/10/2011
Authors: Georgeta Crivat, Fuyuki Tokumasu, Juliana Martha Sa , Thomas E. Wellems, Jeeseong Hwang
Abstract: Plasmodium falciparum (Pf) malaria parasites remodel host erythrocytes by placing membranous structures in the host cell cytoplasm and inserting proteins into the surrounding erythrocyte membranes. Dynamic imaging techniques with high spatial and tem ...

8. Hyperspectral image projection of a pig kidney for the evaluation of imagers used for oximetry
Topic: Biological Physics
Published: 2/10/2011
Author: David W Allen
Abstract: Hyperspectral image projection applied to optical medical imaging can provide a means to evaluate imager performance. This allows repeated viewing of unique surgical scenes without the need for costly experiments on patients. Additionally, the genera ...

9. Generation and Mixing of Subfemtoliter Aqueous Droplets on Demand
Topic: Biological Physics
Published: 8/27/2009
Authors: Kristian Helmerson, Jianyong NMN Tang, Ana Jofre, Rani Kishore, Joseph E. (Joseph E.) Reiner, Mark E Greene, Geoffrey M Lowman, John Denker, Christina NMN Willis, Lori Goldner
Abstract: We describe a novel method of generating monodisperse sub-femtoliter aqueous droplets on demand by means of piezoelectric injection. Droplets with volumes down to 200 aL are generated by this technique. The droplets are injected into a low refractive ...

10. Conformational Effects on Excitonic Interactions in a Prototypical H-bonded Bichromophore: Bis(2-hydroxyphenyl)methane
Topic: Biological Physics
Published: 4/30/2009
Authors: David F Plusquellic, Nathan Pillsbury, Christian Mueller, Timothy Zwier
Abstract: Laser induced fluorescence (LIF), single vibronic level fluorescence, UV holeburning, and fluorescence-dip infrared (FDIR) spectroscopy have been carried out on bis-(2-hydroxyphenyl)methane (2HDPM) in order to characterize the ground and first excite ...

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