The thiol groups produced when wool is treated with NaHSO3 can be methylated by methyl iodide or methyl bromide; the S-cysteinesulphonate groups are unaffected. A similar reaction ocours when wool is treated simultaneously with NaHSO, and dimethyl sulphate.
2.A technique for the isolation of S-methylcysteine from hydrolysates of S-methylated wools by partition chromatography of the N-acetylated amino-acids is described.
A replica technique was developed to study the crystal structure of fats using the electron microscope. The fats were frozen prior to replicating, and it was shown that differing rates of freezing produce structural differences within the fat. The use of Teepol solutions permitted a degree of separation of the solid and liquid phases, and the differences between crystals of the solid phase were shown.
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