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Bioscience

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Displaying 626 - 650 of 1261

NIST Micronutrients Measurement Quality Assurance Program Winter 2008 Comparability Studies: Results for Round Robin LXIII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 28 Ascorbic Acid in Human Serum

August 5, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter 2009 Comparability Studies: Results for Round Robin LXV Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 30 Ascorbic Acid in Human Serum

August 5, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2010 Comparability Studies: Results for Round Robin LXVIII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 33 Ascorbic Acid in Human Serum

August 2, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter 2010 Comparability Studies: Results for Round Robin LXVII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 32 Ascorbic Acid in Human Serum

August 2, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

Identification and Quantification of DNA Repair Protein Apurinic/Apyrimidinic Endonuclease 1 (APE1) in Human Cells by Liquid Chromatography/Isotope-Dilution Tandem Mass Spectrometry

July 29, 2013
Author(s)
Guldal Kirkali, Pawel Jaruga, Prasad T. Reddy, Alessandro Tona, Li Mengxia, David M. Wison III, M Miral Dizdar, Bryant C. Nelson
Unless repaired, DNA damage can drive mutagenesis or cell death. DNA repair proteins may therefore be used as biomarkers in disease detection or therapeutic response estimation. Thus, the accurate measurement of DNA repair protein expression is of

Challenges of the Changing Robot Markets

July 19, 2013
Author(s)
Gurvinder S. Virk, Carol Herman, Roger V. Bostelman, Tamas Haidegger
Service robots are becoming an integrated part of daily life, entering even the most complex scenarios, yet at a slower pace than previously anticipated. This paper presents an overview of the changing area of robotics and the new challenges being faced

Capturing Rare Cells From Blood Using a Packed Bed of Custom-Synthesized Chitosan Microparticles

July 1, 2013
Author(s)
Chandamany Arya, Jason Kralj, Kunqiang Jiang, Matt S. Munson, Thomas Forbes, Don L. DeVoe, Srinivasa R. Raghavan, Samuel Forry
Uniform multifunctional chitosan microparticles were produced in large numbers using a simple and inexpensive microtubing arrangement. The particles were functionalized through both physical encapsulation of carbon black, to attenuate autofluorescence, and

Standard Reference Materials for Medical CT

June 27, 2013
Author(s)
Zachary H. Levine, Huaiyu H. Chen-Mayer, Adam L. Pintar, Daniel S. Sawyer
NIST Standard Reference Materials 2087 and 2088 for medical computed tomography (CT) have become available. The materials allow CT reconstructions to be tied to the International System of Units in length, density, and mass attenuation coefficient.

Anchor Molecules Affect Structure and Properties of Tethered Bilayer Lipid Membranes. Unsaturation in the Alkyl Chains.

June 7, 2013
Author(s)
David J. Vanderah, Rima Budvytyte, Gintaras Valincius, Gediminas Niaura, Vladislava Voiciuk, Mindaugas Mickevicius, Haw-Zan Goh, Hilary Stauffer, Frank Heinrich, Siddharth Shenoy
The self-assembled monolayers (SAMs) of the new lipidic anchor molecule, Z 20-(Z-octadec-9-enyloxy)-3,6,9,12,15,18,22-heptaoxatetracont-31-ene-1-thiol (HC18), and mixed HC18/-mercaptoethanol (ME) SAMs were studied by spectroscopic ellipsometry, contact

Controlled Chemistry for Studying Combined Effects of Extracellular Matrix Proteins

April 22, 2013
Author(s)
Antony K. Chen, Frank W. DelRio, Alexander W. Peterson, Koo-Hyun Chung, Kiran Bhadriraju, Anne L. Plant
The extracellular matrix (ECM) consists of a complex mixture of biochemical and physical stimuli that together regulate cell behavior. Previously we showed that films composed of Type I collagen fibrils induce reproducible and physiologically relevant cell

Effect of Surface Chemistry on Stem Cell Response in 2-D vs. 3-D Cell Culture Niches

April 19, 2013
Author(s)
Sumona Sarkar, Carl G. Simon Jr., Roberta I. Lock, Joy P. Dunkers
To develop tissue engineered devices for regenerative medicine strategies, key scaffold properties for directing stem cell response must be identified. As focus shifts from 2-D to 3-D culture systems in an attempt to better recapitulate the natural

Active Transcriptomic and Proteomic Reprogramming in the C. elegans Nucleotide Excision Repair Mutant xpa-1

April 9, 2013
Author(s)
Katarzyna Arczewska, Gisele Tomazella, Jessica Lindvall, Henok Kassahun, Silvia Maglioni, Alessandro Torgovnick, Johan Henriksson, Olli Matilainen, Bryce J. Marquis, Bryant Nelson, Eshrat Babaie, Carina Holmberg, Thomas Burglin, Natascia Ventura, Bernd Thiede, Hilde Nilsen
Transcription-blocking oxidative DNA damage is believed to contribute to aging and to underlie activation of oxidative stress-responses and down-regulation of insulin-like signaling (ILS) in Nucleotide Excision Repair (NER) deficient mice. Here, we present

Guidelines for Minimum Information for Publication of Quantitative Digital PCR Experiments

April 9, 2013
Author(s)
Ross J. Haynes, Jim Huggett, Carole Foy, Vladimir Benes, Kerry Emslie, Jeremy Garson, Jan Hellemans, Mikael Kubista, Tania Nolan, Michael Pfaffl, Gregory Shipley, Jo Vandesompele, Carl Wittwer, Stephen Bustin
There is growing interest in the digital polymerase chain reaction (dPCR) as technological progress makes it a practical and increasingly affordable technology. dPCR allows the precise quantification of nucleic acid, facilitating the measurement of small

Salivary Antigen-5/CAP Family Members Are Cu 2+ -dependent Antioxidant Enzymes That Scavenge O 2 -. and Inhibit Collagen-induced Platelet Aggregation and Neutrophil Oxidative Burst

April 4, 2013
Author(s)
Teresa Assumpcao, Dongying Ma, Alexandra Schwarz, Karine Reiter, Jaime Santana, John Andersen, Jose Ribeiro, Glen Nardone, Lee L. Yu, Ivo Francischetti
The function of the antigen-5/CAP family of proteins found in the salivary gland of bloodsucking animals has remained elusive for decades. Antigen-5 members from the hematophagous insects Dipetalogaster maxima (DMAV) and Triatoma infestans (TIAV) were

Spectral Light source Distribution variations to enhance discrimination of the common bile duct from surroundings in reflectance hyperspectral imaging

March 8, 2013
Author(s)
Maritoni A. Litorja, Mira Fein, Eleanor Wehner, Karel Zuzak, Edward Livingston
The classification of anatomical features using hyperspectral imaging has been a common goal in biomedical hyperspectral imaging. Identification and location of the common bile duct is critical in cholecystectomies, one of the most common surgical

Gradient Nanofiber Scaffold Libraries for Screening Cell Response to Poly(e-caprolactone)-Calcium Phosphate Composites

March 1, 2013
Author(s)
Carl G. Simon Jr., Limin Sun, Laurence C. Chow, William Miles, Christopher K. Tison, Kaushik Chatterjee, Marian F. Young, Vinoy Thomas, Murugan Ramalingam
A 2-spinnerette approach has been developed for fabricating nanofiber scaffold gradients for use as 1) scaffold libraries for screening the effect of nanofiber properties on cell response and 2) templates for generating graded tissue interfaces. Although
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