How do you clean other types of window treatments? You’ve probably heard about one of the most common types of ozone-depleting compounds, known as chlorofluorocarbons (CFCs). When sunlight returns to Antarctica in the spring, chemical reactions on the surface of these clouds break ozone-depleting compounds down into atoms of chlorine and bromine. Ozone-depleting compounds contain bromine, chlorine, fluorine, carbon and/or hydrogen in different combinations. CFCs contain only fluorine, carbon and chlorine, and traditionally have been used in refrigeration, air conditioning, aerosol cans and as industrial solvents. The CFCs that arrive at the vortex can’t get out, so they become concentrated there. For more information on the ozone hole, CFCs and related topics, look over the links on the next page. Plus, ozone is such a dangerous pollutant at ground level, it might not be wise to produce it even if it were easier to do. Ozone molecules, simply three oxygen atoms bound together, are extremely reactive and can cause real damage at ground level. The above three paragraphs rationalize, albeit very generally, the reactions of some common species, particularly atoms. These atoms are deadly to ozone.

But creating an ozone patch is not a simple proposition. The office cleaning services we provide are specific to your unique requirements, regardless how simple or complex to tidy your office. Multi-purpose cleaners are great for tackling multiple surfaces in one go, from glass to plastic and more, while specific cleaners can target problem areas. Our carpet cleaners go through a thorough training program to enable professionals to operate the specialized equipment effectively. Things like this are why there is a separation between rug and carpet cleaning – the latter can take such supplies, but the former need specialist treatment. The polar vortex exists only over Antarctica, which is why the ozone “hole” exists only there. If we could patch the hole over Antarctica, the natural ozone-oxygen cycle might fall back into balance. These atoms destroy much of the ozone over Antarctica, throwing off the balance of the rest of the ozone layer. Other substances in the stratosphere, like chlorine, break the ozone back down into oxygen molecules and atoms.

This happens naturally in the stratosphere, but the chlorine and bromine there isn’t as concentrated as it becomes during the Antarctic spring. An over-abundance of these compounds, released into the air by human activities, has resulted in the Antarctic ozone hole. But most scientists agree that human activity has caused an imbalance in the oxygen-ozone cycle that has led to a hole in the ozone layer over Antarctica. Department of Health and Human Services. When we applied these three compounds to the skin of healthy mice and the hands of human volunteers, only one, acetophenone, attracted more mosquitoes compared to the control. Any automatic swimming pool cleaner should be able to clean your pool within about three hours, depending on your pool’s size. To investigate this, we placed mice infected with the dengue or Zika virus, uninfected mice and mosquitoes in one of three arms of a glass chamber. When we applied the dengue fever patient odors on one hand of a volunteer and a healthy person’s odor on the other hand, mosquitoes were consistently more attracted to the hand with dengue fever odors. With this in mind, my colleagues and I wondered if other mosquito-borne viruses, such as dengue and Zika, can also change a person’s scent to make them more attractive to mosquitoes, and whether there is a way to prevent these changes.

Similarly, we found that the odors collected from the armpits of dengue fever patients contained more acetophenone than those from healthy people. Though more expensive than a standard permanent outdoor latrine, portable toilets have several significant benefits mostly related to their portability; as they are self-contained, they can be placed almost anywhere. It’s an excellent solution to use on floppy-eared dogs like Bassett Hounds that need to have their ears cleaned often. DIY cleaners can include everything from a homemade all-purpose cleaner to a natural glass cleaner and a solution for grimy, hardwood floors. They’re more versatile than corded vacuums too, as they can be converted into lightweight, handheld cleaners that are suitable for use on upholstery, up high, and even in vehicles. Ozone: Good Up High, Bad Nearby. Like silicon, gallium is a good conductor of electricity, but not a great one. Usually, the building up and breaking down is a balanced process, but it can change according to seasons and because of natural events like volcanic eruptions. Chemicals that act like lecithin to mix immiscible liquids are called emulsifiers. We found one potential option when we observed that infected mice had decreased levels of an important microbe-fighting molecule produced by skin cells, called RELMα.