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Thermal activation of catalytic microjets in blood samples using microfluidic chips

18-09-2013 | Lluis Soler; Cynthia S Martinez-Cisneros; Anka Swiersy; Samuel Sanchez; Oliver G. Schmidt, Lab on a Chip, 2013

We demonstrate that catalytic microjet engines can out-swim high complex media composed by red blood cells and serum. Despite the challenge presented by the high viscosity of the solution at room temperature, the catalytic microjets can be activated at physiological temperature and, consequently, ...


Revisit of a dipropargyl rhodamine probe reveals its alternative ion sensibility in both a solution and live cells

17-09-2013 | Kaibin Li; Xiao-Li Wei; Yi Zang; Xiao-Peng He; Guo-Rong Chen; J. Li; Kaixian Chen, Analyst, 2013

This study reveals that a dipropargyl rhodamine B derivative previously described as a reaction-based irreversible palladium probe responds, however, more sensitively to mercury with a reversible “turn-on” fluorescence. The probe also shows a much better imaging ability for mercury than for ...


Sensors, Vol. 13, Pages 12392-12405: A Dry Membrane Protection Technique to Allow Surface Acoustic Wave Biosensor Measurements of Biological Model Membrane Approaches

13-09-2013 | Reder-Christ, Katrin ; Schmitz, Patrick ; Bota, Marian ; Gerber, Ursula ; Falkenstein-Paul, Hildegard ; Fuss, Christ ..., Sensors, 2013

Model membrane approaches have attracted much attention in biomedical sciences to investigate and simulate biological processes. The application of model membrane systems for biosensor measurements is partly restricted by the fact that the integrity of membranes critically depends on the ...


Sensors, Vol. 13, Pages 12149-12165: A Self-Sensing Active Magnetic Bearing Based on a Direct Current Measurement Approach

11-09-2013 | Niemann, Andries C.; van Schoor, George ; du Rand, Carel P., Sensors, 2013

Active magnetic bearings (AMBs) have become a key technology in various industrial applications. Self-sensing AMBs provide an integrated sensorless solution for position estimation, consolidating the sensing and actuating functions into a single electromagnetic transducer. The approach aims to ...


Study of factors affecting the results of natural water analyses by total reflection X‐ray fluorescence

10-09-2013 | G. V. Pashkova, A. G. Revenko, A. L. Finkelshtein, X-Ray Spectrometry, 2013

The study aims to choose the conditions for the direct analysis of different types of natural water samples by total reflection X‐Ray fluorescence spectrometry (TXRF). The effect of some factors on TXRF results was studied such as the surface density of dried water residue on the sample carrier, ...


Spatial variability in sulphur isotope values of archaeological and modern cod (Gadus morhua)

09-09-2013 | Olaf Nehlich, James H. Barrett, Michael P. Richards, Rapid Communications in Mass Spectrometry, 2013

RATIONALE This study presents the first sulphur isotope data of modern and archaeological cod (Gadus morhua) bone collagen, undertaken to identify large‐scale spatial variability of significance as both baseline values for studies of human diet and a potential variable in isotope‐based studies ...


The Application of Nafion Metal Catalyst Free Carbon Nanotube Modified Gold Electrode: Voltammetric Zinc Detection in Serum

05-09-2013 | Wei Yue, Adam Bange, Bill L. Riehl, Jay M. Johnson, Ian Papautsky, William R. Heineman, Electroanalysis, 2013

Abstract Metal catalyst free carbon nanotube (MCFCNT) whiskers were first used as an electrode modification material on a gold electrode surface for zinc voltammetric measurements. A composite film of Nafion and MCFCNT whiskers was applied to a gold electrode surface to form a mechanically ...


Sensors, Vol. 13, Pages 11797-11817: Automatic Determination of Validity of Input Data Used in Ellipsoid Fitting MARG Calibration Algorithms

05-09-2013 | Olivares, Alberto ; Ruiz-Garcia, Gonzalo ; Olivares, Gonzalo ; Górriz, Juan Manuel; Ramirez, Javier, Sensors, 2013

Ellipsoid fitting algorithms are widely used to calibrate Magnetic Angular Rate and Gravity (MARG) sensors. These algorithms are based on the minimization of an error function that optimizes the parameters of a mathematical sensor model that is subsequently applied to calibrate the raw data. ...


Sensors, Vol. 13, Pages 11709-11727: Design and Implementation of a New Real-Time Frequency Sensor Used as Hardware Countermeasure

04-09-2013 | Jiménez-Naharro, Raúl ; Gómez-Galán, Juan Antonio; Sánchez-Raya, Manuel ; Gómez-Bravo, Fernando ; Pedro-Carrasco, Manuel, Sensors, 2013

A new digital countermeasure against attacks related to the clock frequency is presented. This countermeasure, known as frequency sensor, consists of a local oscillator, a transition detector, a measurement element and an output block. The countermeasure has been designed using a full-custom ...


Simultaneous derivatization and air‐assisted liquid–liquid microextraction of some parabens in personal care products and their determination by GC with flame ionization detection

03-09-2013 | Mir Ali Farajzadeh, Elnaz Marzi Khosrowshahi, Parisa Khorram, Journal of Separation Science, 2013

A simultaneous derivatization/air‐assisted liquid–liquid microextraction technique has been developed for the sample pretreatment of some parabens in aqueous samples. The analytes were derivatized and extracted simultaneously by a fast reaction/extraction with butylchloroformate (derivatization ...


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