Sugars and organic acids are important determinants of taste in fruits and vegetables. Based on the enzymatic analyses originally developed by Boehringer-Mannheim, rapid and reliable microplate-based assays were devised for glucose, fructose and sucrose in tomato and orange juice, and citrate and L-malate in tomato. These microplate assays were used to compare some commercially available tomato...

The microplate format has become a standard for many biological assays such as high throughput screening for drug discovery and radioimmunoassays. Productivity with these high volume procedures has been limited by the amount of sample handling required and low sample counting throughput. Now, however, microplate assays can be efficiently counted in microplates with the Packard TopCount Micropla...

The microplate format has become increasingly popular in biological experimentation due to its small size, easy sample handling, increased throughput, decreased sample preparation, and small sample volume. The need to perform increasing numbers of assays has sparked interest in high throughput, microplate compatible radioisotope counters. Many of these biological experiments are performed on gl...

Chlamydomonas reinhardtii (Cr), a unicellular alga, is routinely utilized to study photosynthetic biochemistry, ciliary motility, and cellular reproduction. Its minimal culture requirements, unicellular morphology, and ease of transformation have made it a popular model system. Despite its relatively slow doubling time, compared with many bacteria, it is an ideal eukaryotic system for microplat...

p 3 Introduction pgs 5-10 Materials and Methods pgs 10-18 Materials General Methods Site-directed Mutagenesis Insertion of Promega’s CBRluc into the pGEX-6P-2 vector Protein Expression and Purification Bioluminescence activity-based light assays Heat inactivation studies Bioluminescence emission spectra Microplate luminometer assays Mammalian cell experiments by Promega collaborators: -Transfec...

Skeletal muscle mitochondria play a specific role in many disease pathologies. As such, the measurement of oxygen consumption as an indicator of mitochondrial function in this tissue has become more prevalent. Although many technologies and assays exist that measure mitochondrial respiratory pathways in a variety of cells, tissue and species, there is currently a void in the literature in regar...

Common Western-blot imaging systems have previously been adapted to measure signals from luminescent microplate assays. This can be a cost saving measure as Western-blot imaging systems are common laboratory equipment and could substitute a dedicated luminometer if one is not otherwise available. One previously unrecognized limitation is that the signals captured by the cameras in these systems...

UV absorbance measurements in microplates became possible only five years ago when Molecular Devices (Sunnyvale, CA, USA) introduced the SPECTRAmax 250, the first UV-Visible microplate spectrophotometer. Microplates have since become very popular for making UV measurements of DNA, RNA and protein concentrations because of their higher throughput compared to traditional cuvettes. Despite their ...

The TopCount Microplate Scintillation and Luminescence Counter has been widely used in biopharmaceutical assays involving both radionuclide and luminescence measurement. A new feature allows the use of TopCount for measuring a high energy beta emitter such as P by Cerenkov counting, a well-known measurement technique that has the main advantage of not requiring the addition of scintillation coc...