Latest App Notes & Case Studies

PSVue® offers a robust alternative to probes currently used by researchers to detect early-to-mid stage apoptosis, as well as bacterial infections.

Accurate measurement of the concentration of a biological product is important in bioreactor/fermenter monitoring, downstream processing and final product quality control. Currently, electrophoretic, chromatographic and immunochemical methods are the most commonly used. These three methods are currently used in combination to provide the desired sample information.

Reporter-gene assays are used to study eukaryotic gene expression. Dual genetic reporters are commonly used in transient transfections of cultured cells to minimize experimental variability. Recently, Promega introduced a Dual-Glo Lucoferase assay system which replaced the outdated ‘flash’ assays used previously. Ensuring both genetic reporters have different substrate requirements enables them to be detected using a single reaction mixture.

The proteasome is a massive protein complex which can recognize and bind targeted proteins, and inject them into the central core where the proteins are successively degraded into short peptides. Whereas protein synthesis is well-understood after decades of study, major advances in our knowledge of protein degradation have occurred only in the last two decades.

When fluorometric and luminometric assays are performed in microplate format, a high number of samples can be analyzed at a time. The speed of the reaction kinetics of the assay determines the requirements for the detection instrument and measurement parameters for achieving the best possible performance of the assay.

The turbidity of a liquid sample is traditionally measured either with a nephelometer or a photometer. The measure of turbidity (also called optical density, OD) refers to the scattering of light from the particles of the measured sample. When measuring turbidity of a bacterial culture, the amount of scattered light is directly proportional to the number of bacterial cells in the sample.

Oxidative stress has been demonstrated to be involved in many diseases including atherochlerosis, Parkinson disease and cancer. Oxidative stress is caused by an imbalance between the production of reactive oxygen and a biological system’s ability to detoxify the reactive intermediates, or easily repair the resulting damages.

Biobanking is becoming a central element in the study of patient genetic data and clinical application of genetic research. Until recently, collections of DNA samples have tended to be fairly small and localized with varied sample containers that were unsuitable for an increasing throughput and automated system use.

With the storage of biological samples such as DNA, protein, blood fractions and viable cells becoming commonplace. The need to store them at lower temperatures has resulted in reading challenges for traditional rack readers.