Journal: PLoS ONE

Article Title: Evaluation of Peripheral Blood Mononuclear Cell Processing and Analysis for Survival Motor Neuron Protein

doi: 10.1371/journal.pone.0050763

Figure Lengend Snippet: Study 3: Comparison of PBMC isolation methods and SMN measures from various blood fractions. Due to the variability in SMN signal and protein concentrations seen with CPT tube PBMC isolation, other methods were explored using the four subjects from Study 2. A : PBMC yield was greatest in samples collected with EDTA tubes and subsequent Lymphoprep gradient separation, and showed no statistically significant changes with isolation delays of up to 24 h. B : Total soluble protein tended to increase with 24 h delays in samples collected by EDTA tube and isolated by CPT tubes, while there was no obvious change in protein concentrations in EDTA/Lymphoprep processing. C : SMN as measured by total protein tended to decrease with isolation delays with EDTA/CPT processing. SMN signals were similar with delays up to 24 h with EDTA/Lymphoprep processing. D : SMN by PBMC counts was variable for both EDTA/CPT and EDTA/Lymphoprep processing methods. However, the EDTA/Lymphoprep values were generally overlapping and did not appear to decrease from the no-delay timepoint (t = 0). In Figure 3 body of the boxplots indicate the first and third quartiles, while the horizontal bar indicates the median.

Article Snippet: Whole blood samples at the Jasper Clinic were collected in BD CPT tubes (#362761, Studies 1–3), EDTA tubes (#22-040-67, Fisher, Pittsburgh, PA in Studies 3–5, and SMAF-001) or ACD tubes (#363083, BD, Franklin Lakes, NJ in Study 5).

Techniques: Isolation, Cycling Probe Technology

Journal: Nanoscale

Article Title: Antioxidant Chemistry of Graphene-Based Materials and its Role in Oxidation Protection Technology

doi: 10.1039/c4nr03275f

Figure Lengend Snippet: GO as a hydroxyl-radical scavenger. A: Addition of 100 ppm GO protects phenol red from oxidation by Fenton-generated · OH over 8 hrs. B: Addition of GO protects the spin-trap DMPO from oxidation by Fenton-generated · OH detected by EPR spectroscopy. The protective effect is concentration dependent over the range 0.1-90 ppm GO. C: Both phenol red monitoring and EPR were used to test if the GO-mediated protective effect is due to radical scavenging or Fenton suppression by Fe-binding. The protective effect of GO is still present when GO-Fe binding is suppressed by EDTA, confirming the importance of radical scavenging. D: GO also protects DMPO when · OH is generated sonochemically, in a non-Fenton assay, providing additional evidence for true radical scavenging. All experiments were done in PBS (pH 3.5).

Article Snippet: Hydrogen peroxide (H2 O2 ), phosphate buffered saline (PBS) (pH 7.4), and EDTA were purchased from Fisher Scientific Inc. (Pittsburgh, PA).

Techniques: Generated, Electron Paramagnetic Resonance, Spectroscopy, Concentration Assay, Binding Assay