Where To Buy Polyethylene Glycol
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Polyethylene glycol-electrolyte solution (PEG-ES) is used to empty the colon (large intestine, bowel) before a colonoscopy (examination of the inside of the colon to check for colon cancer and other abnormalities) or barium enema (a test in which the colon is filled with a fluid and then x-rays are taken) so that the doctor will have a clear view of the walls of the colon. PEG-ES is in a class of medications called osmotic laxatives. It works by causing watery diarrhea so that the stool can be emptied from the colon. The medication also contains electrolytes to prevent dehydration and other serious side effects that may be caused by fluid loss as the colon is emptied.
Polyethylene glycol-electrolyte solution (PEG-ES) comes as a powder to mix with water and take by mouth. Certain PEG-ES products may also be given through a nasogastric tube (NG tube; a tube that is used to carry liquid nutrition and medication through the nose to the stomach for people who cannot eat enough food by mouth). It is usually taken the evening before and/or the morning of the procedure. Your doctor will tell you when you should begin taking PEG-ES, and whether you should take all of the medication at one time or take it as two separate doses. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take PEG-ES exactly as directed. Do not take more or less of it than prescribed by your doctor.
Depending on how one chooses to define the constituent monomer or parent molecule (as ethylene glycol, ethylene oxide or oxyethylene), PEG compounds are also known as PEO (polyethylene oxide) and POE (polyoxyethylene):
Precise and versatile application of PEG in proteomics and other biological research methods depends upon the availability of polyethylene glycol derivatives of defined length (MW) that are activated with specific functional groups. Thermo Scientific Pierce Protein Research Products include a diverse array of such PEG-containing reagents. These Pierce Products provide the building blocks required to covalently attach or modify surfaces, proteins and other molecules with PEG-containing derivatives, a process called PEGylation. By contrast with traditional PEG compounds, Pierce PEGylation Reagents are composed of precisely-defined numbers of PEG units. The remainder of this page describes the various classes of Pierce PEGylation Reagents.
The wide selection of crosslinking reagents now includes those that contain discrete-length polyethylene glycol spacers. These PEG groups increase reagent and conjugate solubility, minimize toxic and immunological effects compared to non-PEG spacers, and provide several options for accommodating specific crosslinking distances.
Amine-to-sulfhydryl crosslinkers that contain a PEG spacer arm. Thermo Scientific Pierce SM (PEG) n is a series of amine-to-sulfhydryl crosslinkers that differ in length from 17.6 to 95.2 angstroms as a result of polyethylene glycol spacer arms containing n equals 2 to 24 ethylene glycol units.
The wide selection of biotin-labeling reagents now include several classes of compounds that incorporate discrete-length polyethylene glycol groups as the primary constituent of the spacer arm. These PEG groups increase reagent and conjugate solubility and minimize toxic and immunological effects compared to non-PEG spacers. The alternative spacer lengths enable optimization of conjugate function for specific biotin-binding assays involving streptavidin, avidin or NeutrAvidin Protein.
NHS-PEG4-Biotin is the PEG equivalent of the popular Sulfo-NHS-LC-Biotin (Part No. 21335) and related reagents. Although the PEG analogs do not use the water-soluble Sulfo-NHS form of the amine-reactive group, equivalent reagent water solubility and membrane impermeability are conferred by the hydrophilic polyethylene glycol spacer arm. In addition, experiments have demonstrated that antibodies labeled with PEG-containing biotin tags reta