Graphene was easily obtained via one-step ultrasonic exfoliation of graphite powder in N-methyl-2-pyrrolidone. Scanning electron microscopy, transmission electron microscopy, Raman and particle size measurements indicated that the exfoliation efficiency and the amount of produced graphene increased with ultrasonic time. The electrochemical properties and analytical applications of the resulting...

Germain En Laye: Y Welker; St Nazaire: D Sandron; Strasbourg: JM Lang, P Fischer; J Pasquali, H Lalanne; C Chartier; C Berlin; E Andres; D Christmann Y Hansmann; P Fraisse; Suresnes: O Bletry, D Zucman, C Majerholc; M Stern, L Couderc; Tarbes: J Petitou; Thionville: F Truchetet, J Pouaha; Thonon Les Bains: P Romand; Toulon: A Lafeuillade, V Lambry; Toulon Naval: P Bernard; Toulouse: D Adoue, M ...

In the present study, effects of several food colorings, namely (Ponceau 4R (E 124), Tartrazine 102), and Pea green 102-E 133), were investigated in vivo using wing spot test, SMART (somatic mutation recombination test), Drosophila melanogaster. Food colorings are additives, which used for improving appearance beverages. SMART, multiple hair (mwh), flare (flr3), beaded serrate (BdS) marker gene...

A simplified and precise automated method is described for the colorimetric determination of serum glutamic oxaloacetic transaminase. The enzymically generated oxaloacetic acid is dialyzed, coupled with Fast Ponceau L, a diazonium salt, to form a colored solution whose absorbance is measured at 455 m . Dialysis eliminates the need for a serum control determination, thereby halving the analysis ...

In this work, the removal of hazardous Ponceau S dye (PS) from aqueous solutions was investigated using Fish Scale (FS) Sardina pilchardus as low-cost adsorbent. Different relevant factors such contact time, initial pH, PS concentration, biosorbent dose and temperature were examined to evaluate their effects. The optimization these performed with a Central Composite Design (CCD). Optimized para...

nique reported by Paty et al. (2). The procedure is as follows: Concentrate 3 mL of CSF 80-fold in a Minicon CS 15 spinal fluid concentrator (Amicon Corp., Lexington, MA 02173). Apply concentrated CSF equivalent to 12 zg of IgG to a Titan III cellulose acetate plate (Helena Labs., Beaumont, TX 77704), and electrophorese for 45 mm at a constant voltage of 180 V, using high-resolution sodium barb...

Reversed-phase high performance liquid chromatography (RP-HPLC) for the determination of five synthetic food dyes (Quinoline Yellow E104, Sunset Yellow E110, Ponceau 4R E124, Tartrazine E102 and Carmine E120) in vitamins was used. The dyes were analyzed within 10 min using a column with stationary phase C 18 (250 mm × 4.6 mm, 5 μm) at 40 °C with isocratic elution, and the mobile phase contained...