American Laboratory Volume 46, Number 7 Contents Chemistry
Advances in GC Valves Extend Service Life and Improve Repeatability by J. Rotter ...............................................................................................................11
Advances in GC valve technology are not only improving repeatability and extending maintenance cycles, but also enabling the much lower detection limits required for sensitive chromatography analyses.
Environmental
Safety and Environmental Considerations in the Life Sciences Laboratory
On the Cover Crystal formation of sulfosalicylic acid, a chemical used in medicine. Technique: polarized light.
Original magnification 200×. Image captured by Mr. Thomas Balla, Fort Collins, CO, U.S.A. Honorable Mention in the 2013 Nikon Small World Photomicrography Competition. For more information, visit
www.nikonsmallworld.com.
by L. Gallagher .........................................................................................................15
This article discusses the areas that pose challenges and the type of gas equipment that need to be employed to ensure a safe atmosphere for the staff and the work environment.
Chemistry
Preparation of SMA/CaCO3 PSA/Ca-MMT/CaCl2
@SiO2 /CaCl2 @SiO2 as a Fluid Loss Agent Based on by X. Zheng, S. Yang, and Z. Lei .................................................................................20
A hybrid, high-temperature fluid loss agent with improved rheological properties has been developed.
Materials Science
Microscopy for Materials Characterization: Illuminating Structures With Light and Electrons
by E.F. Schumacher ..................................................................................................24
This article points out key features of the light microscope and the transmission electron microscope—microscopes at two ends of the resolution scale.
Life Science
Enabling Cancer Research and Treatment With Droplet-Based Digital PCR Technology
by G. Karlin-Neumann ..............................................................................................27
Droplet digital PCR™ is an emerging tool that is demonstrating great utility in cancer treatment and research.
AMERICAN LABORATORY • 2 • SEPTEMBER 2014
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www.americanlaboratory.com
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