An ideal disinfectant should have inactivating properties towards many species of microorganisms, should not induce forming of DBPs, must not negatively impact human health and should be low cost, easy to handle and to keep, non-invasive for work tools and harmless to the environment.
According to the companies and scientists who design new GMO crops, this new technology is harmless to humans, better for the environment, and is the only way to feed an ever-growing population.
Bioflocculants from microbial source have drawn an increasing interest because they are biologically active, biodegradable, nonpolluting and harmless to the environment, hence can be a substitute for conventional chemical flocculants.
It was inferred that acetic anhydride could accelerate the hydrolysis of tetraethyl orthosilicate and the obtained by-product of acetic acid was harmless to the environment.
Moreover, cleaning procedures which can also assure to be harmless to the environment and the operators are particularly valued nowadays.
Using just hot water instead of a chemical cleaning compound can be just as effective and harmless on the environment.
But Mr. Martin said the presence of generic salmonella on a farm meant little, since there were many types of harmless salmonella in the environment.
Most micro-organisms are harmless, many are beneficial, but some are absolutely essential for the environment and human life.
Therefore, time-lags in the discrete competitive Lotka-Volterra system with time-varying environments are both harmless for the permanence and profitless to the extinction of species in system (3.1), these results confirm and improve our previous conclusions for the discrete autonomous Lotka-Volterra systems [37].
