Treatment of adrenal iron-sulfur protein (adrenodoxin) with urea and guanidine HCI results in a deterioration reaction that proceeds through at least two intermediate stages yielding the completely denaturated, colorless protein. The first transient state exhibits a circular dichroism maximum at 470 rnp which is shifted to a longer wave length than that of the native protein (440 mp) ; at 470 r...

The microbial community in eutrophic freshwater sediment was investigated from a 67-cm-deep sediment core collected from the Daechung Reservoir in South Korea, where cyanobacterial blooms have occurred annually for the past 30 years. The majority of core sediments were characterized by dark-grayish, fine-grained mud with abundant gas-escaped and thinly laminated layers. Intervals of summer and ...

Plasticized sulfur/montmorillonite nanocomposites were prepared by the melt-blending method and the dispersion of montmorillonite (MMT) and the mechanical properties of the nanocomposites were studied. Natural sodium montmorillonite (NaMMT) and organically modified montmorillonite (OMMT) were used as filler. Scanning electron microscope (SEM), X-Ray powder Diffraction (XRD...

Transmission Raman measurements of a 1 mm thick sulfur-containing disk were made at different positions as it was moved through 4 mm of aspirin (150-212 μm) or microcrystalline cellulose (Avicel) of different size ranges (<38, 53-106, and 150-212 μm). The transmission Raman intensity of the sulfur interlayer at 218 cm(-1) was lower when the disk was placed at the top or bottom of the powder bed...

While working with the urease of the jack bean, the author has had occasion to study the nature of the proteins that are present. The proteins of the jack bean have been investigated by Jones and Johns,’ who claim to have isolated an albumin and two globulins. The precipitate obtained by half saturation with ammonium sulfate, present in small amount and having the greater sulfur content, they c...

Background & Aim: Persian shallot (Allium hirtifolium Boiss) with common name of "Musir" is one of the endemic medicinal plants in Iran. Leaves and bulbs with antibacterial, antifungal, anticancer, anti-diabetes and anti-obesity effects are edible parts of this plant. The tissue culture is an influential method to multiply plant productions in order to meet demands of ...

Why is it that different organisms do so many different things with sulfur?  Sulfur exists in many different oxidation states  Reduced sulfur is required for many biomolecules  Sulfur forms can serve as an electron sources or as electron acceptors  Oxidation states of sulfur  Sulfur assimilation in bacteria and yeasts  Sulfur-containing biomolecules  Sulfide Oxidation  Sulfate Reduction...

Mycosis fungoides (MF) is the most common form of cutaneous T-cell lymphoma. Persistent antigenic stimulation has been claimed to play a role in the development of this malignancy. We aimed to show the role of sulfur mustard in the pathogenesis of MF. A 45-year-old man with MF is introduced herein. He was a victim of chemical exposure in 1987 during the Iran–Iraq war. He developed skin lesions ...