DROWN'S METHOD OF DETERMINING SULPHUR IN PIG IRON.

Note on Benedict’s Method for Determining Total Sulphur in Urine

There has been considerable discussion on the question of determining total sulphur in urine. Folinl has suggested the use of sodium peroxide as oxidizing agent in determining total urinary sulphur. Benedict,2 by the use of copper nitrate and potassium chlorate, obtains results comparable with those of the Folin method. Ritson3 by using barium peroxide, obtains somewhat higher values than are g...

Clostridial iron-sulphur proteins.

Iron-sulfur proteins are ubiquitous catalysts of a wide range of biological reactions, and are particularly abundant in clostridia which lack the ability to synthesize hemes. The development of research on these metalloproteins has therefore been strongly associated with biochemical investigations of clostridial metabolism. Major breakthroughs in the field, from the first isolation of an iron-s...

Iron Sulphur Proteins, Volume 3

On the positive side, the concept of this series seeks to fill a genuine gap in the present literature with clear, straightforward, detailed and up-to-date accounts of the theory behind the many separation techniques currently available to biochemists. The extent to which it succeeds depends, not only on the quality of the individual contributors, but also on skilful editing. Catsimpoolas can b...

Sulphur and iron abundances in halo stars

From equivalent widths of the S i lines at 8694 Å, Israelian & Rebolo (2001) and Takada-Hidai et al. (2002) have derived a surprisingly high sulphur-to-iron ratio ([S/Fe] ≃ 0.5 to 0.7) in six halo stars with [Fe/H] ≃ −2.0 suggesting perhaps that hypernovae made a significant contribution to the formation of elements in the early Galaxy. To investigate this problem we have used high-resolution s...

Biological functions of iron-sulphur proteins.