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The curve for E. coli is given in the figure, with the most effective UV light having a wavelength of 265 nm. This applies to most bacteria and does not change significantly for other microbes. Dosages for a 90% kill rate of most bacteria and viruses range between 2,000 and 8,000 μJ/cm 2 .
A robotic lawn mower is an autonomous robot used to cut lawn grass. A typical robotic lawn mower (in particular earlier generation models) requires the user to set up a border wire around the lawn that defines the area to be mowed. The robot uses this wire to locate the boundary of the area to be trimmed and in some cases to locate a recharging ...
Killing your entire lawn gets rid of everything—grassy and broadleaf weeds, off-type lawn grasses, and the few strands of good grass you have left. Unlike the five percent household vinegar used ...
Microwave-specific effects tend not to be controversial and invoke "conventional" explanations (i.e. kinetic effects) for the observed effects. [19] Non-thermal microwave effects have been proposed in order to explain unusual observations in microwave chemistry. As the name suggests, the effects are supposed not to require the transfer of ...
Electric lawn mower in grass-cycling mode. Grasscycling is a method of handling grass clippings by leaving them to decompose on the lawn when mowing.The term combines "grass" and "recycling", and had come into use by at least 1990, [1] as part of the push to reduce the huge quantities of clippings going into landfills, up to half of some cities' summertime waste flow, [2] as 1,000 square feet ...
The city said the spill killed 25 to 50 small fish and produced “high levels” of E.coli bacteria. Gentry Estates pond contaminated with sewage by fiber-optic installation Skip to main content
The cut grass may be gathered in a collection bin. This type of mower is used to produce consistently short and even grass on bowling greens, lawns, parks and sports grounds. When pulled by a tractor (or formerly by a horse), these mowers are often ganged into sets of three, five or more, to form a gang mower. A well-designed reel mower can cut ...
A bacterial lawn used in antibiotic resistance testing. Bacterial lawn is a term used by microbiologists to describe the appearance of bacterial colonies when all the individual colonies on a Petri dish or agar plate merge to form a field or mat of bacteria.