Word: nutrient
(lookup in dictionary)
(lookup stats)
Dates: during 1980-1989
Sort By: most recent first
(reverse)
...Isaacs and Lindenmann had the answer by early the next year, a remarkably quick solution to a major scientific puzzle. In a series of experiments, they took pieces of the thin membranes that line the inside of chicken eggshells, grew them in a nutrient solution, and exposed them to influenza viruses. When they added other viruses to the culture, they found that the cells resisted further infection. True to form, the first set of viruses seemed to be thwarting the attack of the second. The researchers next removed all traces of viruses and chicken cells, leaving only the culture brew...
This method of growing plants without soil has long been known to scientists but has only recently begun to attract amateurs' attention. In the simplest hydroponic systems, the plant roots are anchored in gravel or perlite, through which the gardener periodically shoots water and inorganic nutrient solutions. Thus for outdoor hydroponicists there is no digging, weeding, composting or spraying. The indoor gardener is spared the necessity of messing with loam in the home and, if careful, can avoid the danger of bacterial infection around his plants...