نتایج جستجو برای: oxygen sensor

تعداد نتایج: 394025  

Journal: :Hydrogen 2022

An oxygen pump sensor was constructed using yttria-stabilized zirconia, which is an oxide ion conductor, and discharged from steam to generate hydrogen. The consisted of a that discharges controls the partial pressure by having electrodes in two places. Oxygen applying current controlling potential sensor. Hydrogen then generated water vapor. Furthermore, installed second stage, supplied pump, ...

2011
Keisuke Nakamura Kirika Ishiyama Hiroyo Ikai Taro Kanno Keiichi Sasaki Yoshimi Niwano Masahiro Kohno

The aim of the present study is to compare different analytical methods for singlet oxygen and to discuss an appropriate way to evaluate the yield of singlet oxygen photogenerated from photosensitizers. Singlet oxygen photogenerated from rose bengal was evaluated by electron spin resonance analysis using sterically hindered amines, spectrophotometric analysis of 1,3-diphenylisobenzofuran oxidat...

2015
Philipp Lehner Christoph Larndorfer Emilio Garcia-Robledo Morten Larsen Sergey M. Borisov Niels-Peter Revsbech Ronnie N. Glud Donald E. Canfield Ingo Klimant Sabato D'Auria

Most commercially available optical oxygen sensors target the measuring range of 300 to 2 μmol L-1. However these are not suitable for investigating the nanomolar range which is relevant for many important environmental situations. We therefore developed a miniaturized phase fluorimeter based measurement system called the LUMOS (Luminescence Measuring Oxygen Sensor). It consists of a readout de...

Journal: :Neuroscience 1989
T F Freund G Buzsáki O J Prohaska A Leon P Somogyi

A miniature multiple thin-film recording sensor was used to measure simultaneously the electrical activity, oxygen content and temperature of brain tissue. The chamber-type potential sensor was an Ag/AgCl electrode covered by an Si3N4 (silicon nitride) chamber. The chamber-type oxygen sensor consisted of an Au-Ag/AgCl two-electrode electrochemical cell embedded in an electrolyte-filled Si3N4 ch...

Journal: :Biotechnology and bioengineering 2005
Sarina Arain Svenja Weiss Elmar Heinzle Gernot T John Christian Krause Ingo Klimant

Microplates with integrated optical oxygen sensors are a new tool to study metabolic rates and enzyme activities. Precise measurements are possible only if oxygen exchange between the sample and the environment is known. In this study we quantify gas exchange in plastic microplates. Dissolved oxygen was detected using either an oxygen-sensitive film fixed at the bottom of each well or a needle-...

2016
Hemalata Ramesh Torsten Mayr Mathias Hobisch Sergey Borisov Ingo Klimant Ulrich Krühne John M Woodley

BACKGROUND The use of non-aqueous organic media is becoming increasingly important in many biotechnological applications in order to achieve process intensification. Such media can be used, for example, to directly extract poorly water-soluble toxic products from fermentations. Likewise many biological reactions require the supply of oxygen, most normally from air. However, reliable online meas...

Journal: :Journal of laboratory automation 2015
Florian Glauche Gernot T John Sarina Arain Andreas Knepper Antje Neubauer Detlef Goelling Christine Lang Norman Violet Rudibert King Peter Neubauer

In this study, a slow-responding chemo-optical sensor for dissolved oxygen (DO) integrated into a 96-well plate was developed. The slow response time ensures that the measured oxygen value does not change much during plate transport to the microplate reader. The sensor therefore permits at-line DO measurement of microbial cultures. Moreover, it eliminates the necessity of individual optical mea...

Journal: :Radiation research 1997
D R Collingridge W K Young B Vojnovic P Wardman E M Lynch S A Hill D J Chaplin

A novel oxygen sensor which does not rely on electrochemical reduction has been used to measure the oxygenation of the murine sarcoma F in a comparative study with an existing polarographic electrode that is available commercially. The prototype luminescence sensor yielded an oxygen distribution comparable with readings made using a pO2 histograph. The percentage of regions detected that had a ...

2012
Hisataka Maruyama Yu Matsuda Tomohide Niimi Nobuyuki Unozumi Kei Nanatani F. Arai

We developed a novel single cell measurement of photosynthesis activity using fluorescent oxygen sensor in a microchamber with gas barrier layer. We used Synechocystis sp. PCC 6803, which is a series of cyanobacteria. The chamber wall contains oxygen sensor and gas barrier layer to measure the dissolved oxygen concentration in the chamber. The oxygen concentration is changed by aerobic respirat...

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