نتایج جستجو برای: tracer techniques

تعداد نتایج: 707387  

2013
Zhongwei Chen David A. Pensak Weiting Yu

Over the past 20 years, C-metabolic flux analysis (C-MFA) has emerged as the leading technology for accurate quantification of intracellular fluxes in microbial, mammalian and plant systems. Despite major advances in experimental, analytical and computational techniques, isotopic experiment design is often neglected for C-MFA. Optimal design of isotopic experiments is of central importance as i...

2000
C. F. Kaminski J. Hult M. Richter J. Nygren A. Franke M. Aldén S. Lindenmaier A. Dreizler U. Maas R. B. Williams

This paper reports on the development of novel time resolved spectroscopic imaging techniques for the study of spark ignition phenomena in combustion cells and an SIengine. The techniques are based on planar laser induced fluorescence imaging (PLIF) of OH radicals, on fuel tracer PLIF, and on chemiluminescence. The techniques could be achieved at repetition rates reaching several hundreds of ki...

Journal: :RADIOISOTOPES 1973

Journal: :RADIOISOTOPES 1981

Journal: :Nature 1951

2008
David T. Ho James R. Ledwell William M. Smethie

[1] SF6 tracer release experiments (TREs) have provided fundamental insights in many areas of Oceanography. Recently, SF6 has emerged as a powerful transient tracer, generating a need for an alternative tracer for large-scale ocean TREs. SF5CF3 has the potential to replace SF6 in TREs, due to similarities in their properties and behavior, as well as techniques for injection, sampling, and analy...

Journal: :Lab on a chip 2014
Christian Rensch Simon Lindner Ruben Salvamoser Stephanie Leidner Christoph Böld Victor Samper David Taylor Marko Baller Stefan Riese Peter Bartenstein Carmen Wängler Björn Wängler

The application of microfluidics to the synthesis of Positron Emission Tomography (PET) tracers has been explored for more than a decade. Microfluidic benefits such as superior temperature control have been successfully applied to PET tracer synthesis. However, the design of a compact microfluidic platform capable of executing a complete PET tracer synthesis workflow while maintaining prospects...

Journal: :International journal of cancer 2015
Martin C Boonstra Berend Tolner Boudewijn E Schaafsma Leonora S F Boogerd Hendrica A J M Prevoo Guarav Bhavsar Peter J K Kuppen Cornelis F M Sier Bert A Bonsing John V Frangioni Cornelis J H van de Velde Kerry A Chester Alexander L Vahrmeijer

Surgery is the cornerstone of oncologic therapy with curative intent. However, identification of tumor cells in the resection margins is difficult, resulting in nonradical resections, increased cancer recurrence and subsequent decreased patient survival. Novel imaging techniques that aid in demarcating tumor margins during surgery are needed. Overexpression of carcinoembryonic antigen (CEA) is ...

2001
F. Cardinaux L. Cipelletti F. Scheffold P. Schurtenberger

– Optical tracer-microrheology has been applied to study the rheological properties of a concentrated surfactant solution. Under the chosen conditions these surfactants selfassemble to form giant polymer-like micelles, resulting in a strongly viscoelastic liquid. A novel approach to the analysis of the local dynamic properties of tracer particles is presented, based on a combination of singlean...

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