CIX.—The stereoisomeric tetramethyl methylglucosides and tetramethyl glucose
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Tetramethyl lead absorption: a report of human exposure to a high level of tetramethyl lead.
Accidental human exposure to a high level of tetramethyl lead is described. Tetramethyl lead is blended with petrol as an antiknock agent, and it has similar physical properties to tetraethyl lead. The patient had high levels of lead in urine, averaging 4-75 mumol (983 mug) daily for the first four days after exposure and he continued to have raised levels of urinary lead for six months. He had...
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Tetramethyl lead (TML) has recently been adopted as an antiknock substance in gasoline. In some industries, tetramethyl lead has been substituted for tetraethyl lead (TEL) mixture or "ethylfluid". This recent development is the result of technical research which has shown that there is a more uniform octane distribution in all light and heavy fractions of gasoline in the combustion cylinders wi...
متن کاملSurface Reactions of 3,3',5,5'-tetramethyl Benzidine on Hectorite
-The adsorption and oxidation of 3,3',5,5'-tetramethyl benzidine (TMB) on hectorite has been investigated using X-ray powder diffraction, ultraviolet-visible spectroscopy, electron spin resonance, and infrared spectroscopy. The molecule adsorbed by cation exchange at low adsorption levels and oxidized to the monomeric radical cation (yellow). At higher adsorption levels, intercalation of TMB oc...
متن کاملTetramethyl-p-phenylenediamine oxidase reaction in Azotobacter vinelandii.
It was possible to quantitate the tetramethyl-p-phenylenediamine (TMPD) oxidase reaction in Azotobacter vinelandii strain O using turbidimetrically standarized resting cell suspensions. The Q(O2) value obtained for whole cell oxidation of ascorbate-TMPD appeared to reflect the full measure of the high respiratory oxidative capability usually exhibited by this genera of organisms. The Q(O2) valu...
متن کامل3.4-Dihydro-l, 2, 3, 4-tetramethyl- pentafulvalene and its Conversion to Ferrocenes
Pentafulvenes have been widely used as starting compounds for the synthesis of transition-metal cyclopentadienyl (Cp) compounds, not least the metallocenes [1], The route is based on the unique reactivity of the exocyclic methylene carbon atom and furnishes two types of substituted Cp deriva tives depending on the anion that attacks the fulvene. If the anion (mostly carbanion, [R3]~ in Scheme ...
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ژورنال
عنوان ژورنال: J. Chem. Soc., Trans.
سال: 1904
ISSN: 0368-1645
DOI: 10.1039/ct9048501049