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The following table presents pK a values at 20 °C. Values change by about 0.01 per degree of temperature. [1] [3] Good's original 1966 paper had two older buffers (marked with italics) for comparison.
MOPS (3-(N-morpholino)propanesulfonic acid) is a buffer introduced in the 1960s, one of the twenty Good's buffers.It is a structural analog to MES, [1] and like MES, its structure contains a morpholine ring.
Buffer capacity falls to 33% of the maximum value at pH = pK a ± 1, to 10% at pH = pK a ± 1.5 and to 1% at pH = pK a ± 2. For this reason the most useful range is approximately pK a ± 1. When choosing a buffer for use at a specific pH, it should have a pK a value as close as possible to that pH. [2]
Random-orbital sanders use sandpaper disks, and many include integrated dust collectors. Disks are attached using either pressure-sensitive adhesives or a hook and loop system. On models equipped with a dust collection feature, a vacuum sucks discharged dust through holes in the paper and pad, feeding it to a bag, shop vac , or canister.
A good Korean barbecue restaurant sequences the order of your meats based on their increasing levels of fat, according to Kim. The meal always begins with beef and finishes with pork.
Updated December 4, 2024 at 10:30 AM SARASOTA, Fla. – A former ballerina was sentenced Tuesday to 20 years in prison for the shooting death of her estranged husband at her Florida home in 2020.
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