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Health

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Displaying 451 - 475 of 848

Relative Rigidity of Cell-Substrate Affects Hepatic and Hepatocellular Carcinoma Cell Migration

December 3, 2012
Author(s)
Martin Y. Chiang, Hongbing Wang, Li Zhong, Qiaoyan Tan, Gurinder K. Singh, Song Li, Li Yang, Yanzi Yangben
Polyacrylamide gels with different stiffness and glass were employed as substrates to investigate how substrate stiffness affects the cellular stiffness of adherent hepatocellular carcinoma (HCCLM3) and hepatic (L02) cells. The interaction of how cell

Simple device for rare cell capture from whole blood

September 26, 2012
Author(s)
Jason G. Kralj, Samuel P. Forry, Matt S. Munson, Thomas P. Forbes, Chandamany Arya, Lynn Sorbara, Alessandro Tona, Sudhir Srivastava
We have developed a system to isolate rare cells from whole blood using commercially available components and simple microfluidics that can provide biologists with the capabilities of the monolithic devices. We characterized the capture of MCF-7 cells

Evaluation of viability and proliferation profiles on macrophages treated with silica nanoparticles in vitro via plate-based, flow cytometry, and Coulter counter assays

September 3, 2012
Author(s)
Simona Bancos, De-Hao D. Tsai, Vincent A. Hackley, J L. Weaver, Katherine M. Tyner
Nanoparticles (NPs) are known to interfere with many high throughput cell viability and cell proliferation assays, which complicates the assessment of their potential toxic effects. The aim of this study was to compare viability and proliferation results

Disentangling the effects of polymer coatings on silver nanoparticle agglomeration, dissolution, and toxicity to determine mechanisms of nanotoxicity

September 1, 2012
Author(s)
Justin M. Zook, Melissa D. Halter, Danielle Cleveland, Stephen E. Long
Silver nanoparticles (AgNPs) are frequently coated by a variety of polymers, which may affect various intertwined mechanisms of toxicity, including agglomeration and dissolution rate. Here, we measure how citrate, dextran, poly(ethylene glycol) (PEG)

Review: Biological Imaging Software Tools

August 29, 2012
Author(s)
Anne L. Plant, Kevin Eliceiri, Anne Carpenter
Few technologies are more widespread in modern biological laboratories than imaging by microscopy. Advancements in optical technologies and instrumentation over the past twenty years have led to massive improvements in the resolution, specificity

An instrumented bioreactor for mechanical stimulation and real-time, nondestructive evaluation of engineered cartilage tissue

June 1, 2012
Author(s)
Jenni R. Popp, Justine Roberts, Douglas V. Gallagher, Kristi S. Anseth, Stephanie Bryant, Timothy P. Quinn
Mechanical stimulation is essential for chondrocyte metabolism and cartilage matrix deposition. In vitro, mechanical stimulation is accomplished via culture in a bioreactor. Traditional methods for evaluating the developing tissue are destructive, time

On the need for an international effort to capture, share and use crystallisation screening data (failure and success)

June 1, 2012
Author(s)
David Gallagher, Janet Newman, Evan E. Bolton, Jochen M?Dieckmann, Vincent J. Fazio, David Lovell, Joseph R. Luft, Thomas S. Peat, David Ratcliffe, Roger A. Sayle, Edward H. Snell, Kerry Taylor, Pascal Vallotton, Sameer Velankar, Frank V. Delft
Crystallisation of biological macromolecules is seen by most structural biologists as a necessary evil, a means to the end, which is knowledge about a macromolecular structure. Crystallization remains largely a trial-and-error process, with extensive

Developing digital tissue phantoms for hyperspectral imaging of ischemic wounds

May 18, 2012
Author(s)
David W. Allen, Jeeseong Hwang, Maritoni A. Litorja, Joseph P. Rice
Biomedical optical imaging has the potential to achieve high spatial resolution and high functional sensitivity for non-invasive assessment of ischemic wounds. However, clinical acceptance of many optical imaging devices is hampered by poor reproducibility

Optimization of Imaging Polymer Based Scaffolds Using X-Ray Microcomputed Tomography

May 15, 2012
Author(s)
David E. Morris, Melissa L. Mather, Carl Simon Jr., John A. Crowe
The performance of polymer based scaffolds used in regenerative medicine is linked to their structural properties and as such strategies for structural characterization of scaffolds have been developed. X-ray microscopic computed tomography (X-ray micro CT
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