ADEQUATE summaries of the literature dealing with the products resulting from the decomposition of amino-acids by various bacteria have been prepared by Stephenson [1930] and Buchanan and Fulmer [1930]. In the case of cystine a study of these reviews and of more recent literature makes it evident that previous investigators have concerned themselves with the formation ofhydrogen sulphide, ethyl...

Cytotoxicity of cadmium sulphide, oxide and chloride was tested using A549 and CHO-9 cells. Metabolic activity of cells (MTT test) and cell membrane permeability (NRU test) were used as cytotoxicity endpoints. The results revealed unexpectedly low toxicity of cadmium sulphide as compared to chloride and oxide. This preliminary report does not provide any explanation for this effect, but the res...

In all major industries increasing importance is placed on the use of instruments that analyse process streams effectively and efficiently for long periods of practically unattended operation. This helps the process operator to keep an inventory of the materials leaving the process, and check the operating efficiency. In the field of pollution, it helps to confirm that the process is operated w...

The cell association of copper in the yeast Saccharomyces cerevisiae can involve both binding to the cell wall and the accumulation of copper within the cell. The former process requires the concurrent generation of H2S by the cell via the reduction of sulphate. The contributions of each of these processes to the uptake of 64Cu by wild type and met3-containing (ATP sulphurylase-deficient) strai...

Gelatin-stabilized copper sulphide nanoparticles with conjugated doxorubicin have been developed for combined photoacoustic imaging, enzyme-responsive drug release and photothermal therapy.

The present research was conducted to extract keratin protein from chicken feathers. Protein is an important nutrient needed by our body to maintain body structures and is an important ingredient for cosmetic products. Chicken feathers have high level of keratin protein content and can become a suitable protein source. The main processes involved are first dissolving chicken feathers using diff...