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26 Current white paper about the topic fluorescence

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Promotion of Aggregation as a Means of Assessing the Stability of Antibody Molecules

Thioflavin T aggregation assay to determine antibody stability using the FLUOstar Omega

03-11-2011

The efficiency of antibody molecules is dependent on their stability. We introduce an assay setup where stability of antibodies is measured. Shaking stress is initiated by the FLUOstar Omega microplate reader and aggregation propensity of antibody candidates is measured in 96-well format...

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RealTime ready RT-qPCR Assay Development and Qualification

01-06-2011

On the RealTime ready Configurator, we offer function tested human, mouse, and rat qPCR assays for gene expression quantification based on the unique Universal ProbeLibrary technology (UPL). The Universal ProbeLibrary is a set of short hydrolysis probes (8–9-mers) containing modified bases in order to stabilize the binding and thus ensure high flexibility together with good amplicon specificity...

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Characterizing Biotherapeutics with HPLC

Smart Solutions for large Molecules

24-11-2010

As demonstrated here, there are a broad range of HPLC applications used in development, production, validation and release of protein therapeutics for human use. Some of the applications mentioned above are mandatory when submitting a new biopharmaceutical to approval at the regulatory agencies. The introduction of the first so-called biosimilars in Europe further increased the demand for highly efficient analysis methods. The continuous development of new stationary phases for the common modes of biochromatography, such as size exclusion, ion exchange and hydrophilic interaction chromatography support biochemists in increasing lab productivity and establishing high-throughput HPLC analysis not only for small molecules but also for large biopolymers...

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Membrane Fluidity Measurements Using UV Fluorescence Polarization and the POLARstar Omega

23-06-2010

The POLARstar Omega microplate reader from BMG LABTECH was used to study membrane fluidity via fluorescence polarization in 96-well format. The method allows for the monitoring of large scale alterations in membrane fluidity (such as phase transitions), as well as more subtle changes in lipid dynamic. The change in polarization caused by dibucaine and propranolol were investigated in both liposomes and mitochondrial membranes...

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alamarBlue® Assay for Assessment of Cell Proliferation using the FLUOstar OPTIMA

23-06-2010

The alamarBlue® cell proliferation assay is based on a reducing environment that indicates metabolic active cells. Active cells are able to convert resazurin into the resorufin. Resazurin is blue and non-fluorescent whereas resorufin is red and highly fluorescent; therefore a fluorescent and a colorimetric detection are possible. This application notes focuses on the quantification of cell proliferation in a Human Osteoblast cell culture by measuring alamarBlue® fluorescence on the FLUOstar OPTIMA microplate reader...

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Application of the Amplifluor® SNPs Genotyping System using a FLUOstar OPTIMA microplate reader

16-06-2010

The detection of SNPs (single nucleotide polymorphisms) is an important tool for researchers in order to find mutations in DNA sequences. In this application note we describe a homogeneous fluorescence assay based on PCR. The Amplifluor® SNPs HT Genotyping System from Millipore was used to screen a number of samples with the help of the FLUOstar OPTIMA multidetection microplate reader from BMG LABTECH...

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ORAC Assay Performed on the POLARstar Omega and PHERAstar FS microplate reader

15-09-2009

In all oxygen consuming cells, metabolism and oxidative stress generate several intermediates and byproducts that are collectively known as reactive oxygen species (ROS). ROS are necessary intermediates in the human body, but they are also involved in the aging process and in the development of many degenerative diseases, including cancer, heart disease, Alzheimer's and Parkinson's. Herein we describe the determination of the antioxidant capacity of different fruit juices using the ORAC assay; a standardized method that uses Trolox®, a water-soluble analogue of vitamin E, as a standard substance...

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Adaptation of SmartAmp-2 Assays for Microsatellite Copy Number Polymorphism Detection on the LightCycler® 480 Instrument

07-09-2009

The Smart Amplification process, version 2 (SMAP-2), also known as SmartAmp-2, is a rapid polymorphism detection system based on a unique asymmetric primer design, including a folding primer (FP) and a turn-back primer (TP) [1]. Combined with Thermus aquaticus MutS (Taq MutS) protein in an isothermal amplification procedure, the technique enables suppression of mis-amplification of highly related sequences (e.g., a wild-type sequence versus an SNP variant), minimizing background amplification. The Taq MutS protein binds to mis-matched nucleotides in erroneously primed dsDNA and prevents further amplification by blocking the dissociation of DNA duplexes having a mis-match by DNA polymerases having strand displacement activity. SmartAmp-2 assays have been used for detection of various SNPs and mutations, e.g., in ALDH2 and EGFR genes [1,2]. In the study presented here, we investigated whether this assay principle could be adapted for detection of microsatellite polymorphisms showing copy number differences in...

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Improvement of power generation efficiency of solar cells and evaluation by fluorescence spectroscopy

24-08-2009

The light in the high-radiance wavelength region of the solar spectrum is not utilized effectively by silicon crystal-based solar cell modules. "Fluorescent materials" convert the ultraviolet component in the sunlight into light in the longer wavelength region where this solar cell modules can generate power. This article describes an example, how the efficiency of a fluorescent material can be evaluated, using a fluorescence spectrophotometer equipped with an integrating sphere, and a special program, which allows the determination of quantum yields of powders in a very comfortable way....

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Analysis of Prostate Tumour Cell Invasion Using BD FluoroBlokTMand FLUOstar OPTIMA

Real-time analysis of tumour cell invasion with a FLUOstar OPTIMA enclosed in an AtmosBag

24-06-2009

The FLUOstar OPTIMA is used for reading the BD Biosciences FluoroBlok(TM) tumour cell invasion system. In this application note we show that the results are comparable to the traditional invasion assays. The introduced method is fast, saving time and labour. The FLUOstar OPTIMA is able to take multiple readings over time at a user defined temperature...

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