Fungal growth

ASTMD1286 mixed fungal culture fungal growth, viscosity change... 

Antimicrobial agents are used where there is a need to inhibit bacterial and fungal growth. The additives can consist of copper, germanium, zinc and zinc compounds, metal oxides or sulfides, metal zeofltes, as well as silver and copper oxide-coated inorganic core particles (154—159) (see Industrial ANTIMICROBIAL AGENTS). 

Some corrosion inhibitors can encourage the production of fungal growths in the relatively static cold water in the header tanks of these systems. Biocides will then often need to be included in the inhibitor formulation. 

Fungistasis is the inhibition of fungal growth without killing the fungal cell. 

Recently, there has been much interest in developing water-soluble tributyltin biocides to lessen the costs of application, and to prevent fire hazards when treating material in confined spaces. Bis(tributyltin) oxide itself has a very low aqueous solubility ( 0.001%), but it may be made water-dispersible by the addition of certain (534, 535) quaternary ammonium salts. Formulations of this type, although currently under development as wood preservatives (534), have been used extensively in the United Kingdom for the treatment of stonework to eradicate fungal growths, algae, mosses, and lichens (535). 

Fig. 18.2 Fungal growth on a tablet which has become damp (raised Aw) during storage under humid conditions. Note the sparseness of mycelium, and conidiophores. The contaminant is thought to be a Penicillium sp... 

In additional tests, the suppressor activities of pectins in the intact host/pathogen-interaction were investigated by injecting genetically resistant plants with pectic substances prior to inoculation with the rust fungus. Infected leaves were harvested, cleared, and stained with Calcofluor one week after inoculation, and fungal growth was assessed under the UV-epifluorescence microscope. 

T. Borjesson, U. Stollman, and J. Schnurer, Volatile metabolites produced by six fungal species compared with other indicators of fungal growth on cereal grains, Appl. Environ. Microbiol. 58 2599 (1992). 

This systemic fungicide has both protective and curative properties for preventing fungal growth and penetration from infection cushions, causes collapse of hyphae and infection cushions. 

Plastic materials may be protected against microbial attack by incorporation of an active fungistat.8 These are substances that lead to a suppression of fungal growth on the plastic materials. 

Active ingredient % in the foil Zone of inhibited growth [mml Fungal growth upon the specimen ... 

---