Better Understanding of Water’s Freezing Behavior at Nanoscale

The results of a new study led by George Washington University Professor Tianshu Li provide direct computational evidence that nucleation of ice in small droplets is strongly size-dependent, an important conclusion in understanding water’s behavior at the nanoscale. The formation of ice at the nanoscale is a challenging, basic scientific research question whose answer also has important implications for climate research and other fields.

Waters-Freezing

Ice cube (stock image). According to a new study, nucleation of ice in small droplets is strongly size-dependent, an important conclusion in understanding water’s behavior at the nanoscale.

The crystallization of ice from supercooled water is generally initiated by a process called nucleation. Because of the speed and size of nucleation — it occurs within nanoseconds and nanometers — probing it by experiment or simulation is a major challenge. Read more

Is Enough Being Done to Make Drinking Water Safe?

There is a lack of evidence regarding the effectiveness of technologies used to reduce arsenic contamination finds research in BioMed Central’s open access journal Environmental Evidence. More studies assessing the technologies themselves and how they are used in the community are needed to ensure that people have access to safe, clean water.

christopher-saintArsenic is now recognised to be one of the world’s greatest environmental hazards, threatening the lives of several hundred million people. Naturally occurring arsenic leaches into water from surrounding rocks and once in the water supply it is both toxic and carcinogenic to anyone drinking it. It is colourless and odourless and consequently people use it instead of more obviously polluted surface water. Natural arsenic pollution affects 21 countries across the world sometimes reaching a concentration more than ten times the WHO guidelines. Read more

Magic Pond: Green Lake in Tragoess, Austria

Green-Lake-in-Tragoess01These photographs appear to show a spectacular underwater world making it ideal for scuba divers – in central Europe. Twelve metres of water covers trees, footpaths, benches and bridges that are usually accessible throughout the year. Visitors to the Green Lake in Tragoess, Austria, that is normally only one metre deep, can leisurely stroll around the picturesque lagoon. Read more

Washing Laundry in Cold Water is the Same As…

A full 90 percent of the energy used in washing clothes goes toward heating the water, so it stands to reason that using less energy by washing in cold, unheated water would create significant environmental savings. But just how much difference are we really talking about?

washing-machine01We got the TreeHugger HQ math monkeys to crunch some numbers, and came up with some pretty interesting results. It turns out that pressing the cold/cold button (instead of the hot/warm button) on your washing machine has the same impact as… Read more

Size Matters for Creatures of Cold Polar Waters

Scientists at the Universities of Liverpool, Plymouth, and Radboud, Netherlands, have challenged the view that giant animals are found in polar seas because of a superabundance of oxygen in cold water.

Basking-sharkIt is thought that giant insects and other creatures hundreds of millions of years ago evolved due to a superabundance of oxygen and that this could also explain the existence of giant sea creatures today. The new research, published in Functional Ecology, however, suggests that this may not be the case. Read more