Metallothioneins: chemical and biological challenges

Physiological and chemical characterization of cyanobacterial metallothioneins.

Techniques have been developed for detection, quantitation, and isolation of bacterial metallothioneins (MTs) from cyanobacterial species. These methods involve differential pulse polarography and reverse-phase high-performance liquid chromatography (HPLC) and have allowed detection of picomole quantities of these high sulfhydryl content proteins. The prokaryotic molecule was found to be induce...

Induction, regulation, degradation, and biological significance of mammalian metallothioneins.

MTs are small cysteine-rich metal-binding proteins found in many species and, although there are differences between them, it is of note that they have a great deal of sequence and structural homology. Mammalian MTs are 61 or 62 amino acid polypeptides containing 20 conserved cysteine residues that underpin the binding of metals. The existence of MT across species is indicative of its biologica...

[Chemical and biological warfare].

Complex systems and networks: challenges and opportunities for chemical and biological engineers

The di5erence between the complicated and the complex is not just quantitative; it is also qualitative. Complexity requires both an augmentation of the conceptual framework and new tools. In this manuscript we describe the challenges faced when studying complex systems and describe how scientists from many di5erent areas have responded to these challenges. We brie:y describe the toolkit used fo...

Assessment Maize Hybrids Response to Biological and Chemical Nitrogen Fertilizers

This research set out to evaluate the effect of combined biological and chemical nitrogen fertilizers on some corn hybrids. To this end an experiment was conducted as split plot on the basis of randomized complete block design with four replications. Main plots were included: use of chemical and biological fertilizers in four levels: 100% chemical fertilizer, 75% chemical fertilizer + 100% bio-...