Retention on TLC plates is measured in Rf (retention factor), whereas in column chromatography, it is usually expressed in CV (column volumes): R f = (distance traveled by desired compound) / (distance traveled by solvent) CV = 1 / R f
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Mortgage real estate investment trust ETFs offer very attractive double-digit yields. Investors, though, are learning that the robust payouts come with risks, especially in a rising rate environment. The iShares Mortgage Real Estate Capped ETF (NYSEArca: REM) has a 14.73% 12-m...nvestors have sought out mortgage-backed real estate investment trust exchange traded funds for their highly attractive yields, riding out short-term volatility as interest rates fluctuated. However, some mREITs are starting to cut back on payouts. At least 10 mortgage REITs ...