Cell culture protocol for freezing cell lines at high cell viabilities using cryopreservation reagents such as DMSO. Cryopreservation is a method whereby cells are frozen, maintaining their viability, until they are defrosted months or years later. Free ECACC handbook download.
Larger porous shell particles with narrow particle size distribution, used in Supelco's BIOshell™ columns for the reversed-phase U/HPLC analysis of peptides and proteins, provide increased efficiency per unit pressure drop.
Potency testing in marijuana-infused edibles is an important problem that analytical labs are facing due to the complexity of the involved matrices. Concentration of active ingredients in these edibles can range from a few parts per million to 3.5 parts
Pesticide residue testing of turmeric and other (dried) spices is challenging due to their complex compositions and high matrix. An efficient SPE clean-up can be achieved by a new Dual-layer cartridge.
Two metabolic pathways exist for the biosynthesis of isopentenyl pyrophosphate and dimethylallyl pyrophosphate: The mevalonate pathway, predominantly used by plants and in a few insect species. The non-mevalonate pathway or methyl D-erythritol 4-phosphate (MEP) pathway, which occurs in plant chloroplasts
Data was compiled to assist the researcher in selecting references most likely to contain relevant information regarding use of Percoll for a particular cell or tissue type.
The table was compiled to assist the researcher in selecting references most likely to contain relevant information regarding use of Percoll in various cell types.
Phosgene is 170 times more reactive than TP, the main phosgene substitute. Therefore, reactions with phosgene can be carried out under much milder conditions than with TP. Compounds will react faster and at lower temperatures (often at -78°C), preserving sensitive