Abstract

The Seris Head stage (ion-selective). This component has been completely redesigned to overcome inherent limitations and noise. We have moved from the AD515 to the AD549 as the signal-input device (Analog Devices). The AD 549 has superior noise and input characteristics. We have also incorporated a low pass filter and a differential amplifier in the head stage to increase common mode rejection. The AD549 is socketed in a Teflon mounting with gold plated pins. This increases the operator's ability to easily repair the head stage. While resistors have been added to decrease the probability of the AD549 being damaged by static charges, we have found that failures still occur and easy replacement is necessary. The Serp Head stage (polarographic). The amperometric head stage used for the Seris-oxygen also uses the AD549 as its input device. However the AD549 is configured as a current to voltage converter (I to E) uses a resistor of 1000 MegOhms. This gives us an output of 1mV per pA. The polarization voltage is applied to the positive input of the AD549 to elevate the sensing node of the I to E converter to the polarization voltage. The output of the I to E converter is then sent to a differential amplifier along with the polarization voltage. The result is a voltage output proportional to the current, which in turn flows as a result of applying the polarization voltage in an oxygen gradient.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR001395-16
Application #
6281104
Study Section
Project Start
1997-12-01
Project End
1998-11-30
Budget Start
1997-10-01
Budget End
1998-09-30
Support Year
16
Fiscal Year
1998
Total Cost
Indirect Cost

  Institution

Name
Marine Biological Laboratory
Department
Type
DUNS #
001933779
City
Woods Hole
State
MA
Country
United States
Zip Code
02543

  Publications

Demidenko, Eugene; Glaholt, S P; Kyker-Snowman, E et al. (2017) Single toxin dose-response models revisited. Toxicol Appl Pharmacol 314:12-23
Chowanadisai, Winyoo; Messerli, Shanta M; Miller, Daniel H et al. (2016) Cisplatin Resistant Spheroids Model Clinically Relevant Survival Mechanisms in Ovarian Tumors. PLoS One 11:e0151089
De Martino, Federico; Moerel, Michelle; Ugurbil, Kamil et al. (2015) Less noise, more activation: Multiband acquisition schemes for auditory functional MRI. Magn Reson Med 74:462-7
Van Mooy, Benjamin A S; Hmelo, Laura R; Fredricks, Helen F et al. (2014) Quantitative exploration of the contribution of settlement, growth, dispersal and grazing to the accumulation of natural marine biofilms on antifouling and fouling-release coatings. Biofouling 30:223-36
Brodsky, Alexander S; Fischer, Andrew; Miller, Daniel H et al. (2014) Expression profiling of primary and metastatic ovarian tumors reveals differences indicative of aggressive disease. PLoS One 9:e94476
De Martino, Federico; Zimmermann, Jan; Muckli, Lars et al. (2013) Cortical depth dependent functional responses in humans at 7T: improved specificity with 3D GRASE. PLoS One 8:e60514
De Martino, Federico; Moerel, Michelle; van de Moortele, Pierre-Francois et al. (2013) Spatial organization of frequency preference and selectivity in the human inferior colliculus. Nat Commun 4:1386
Vang, Souriya; Wu, Hsin-Ta; Fischer, Andrew et al. (2013) Identification of ovarian cancer metastatic miRNAs. PLoS One 8:e58226
Chowanadisai, Winyoo; Graham, David M; Keen, Carl L et al. (2013) Neurulation and neurite extension require the zinc transporter ZIP12 (slc39a12). Proc Natl Acad Sci U S A 110:9903-8
Graham, David M; Messerli, Mark A; Pethig, Ronald (2012) Spatial manipulation of cells and organelles using single electrode dielectrophoresis. Biotechniques 52:39-43

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