During the Battle of Cuito Cuanavale, South African troops then fighting in Angola were issued with gas masks and ordered to rehearse chemical weapons drills. Daniel Mindiola, a chemistry professor at the University of Pennsylvania who we reached through the American Chemical Society. This partnered with Nicholas Kurti, emeritus professor emeritus of physics at Oxford University, and the two physical scientists launched a new scientific discipline: molecular gastronomy. But what exactly is molecular gastronomy? Next, you place your meat, along with seasonings, into a heat-safe plastic bag, seal it and place it in the hot-water bath. When you cut into the meat, you will find it is juicy, tender and delicious. On the next page we’ll find out why marbles form, what tracks are known for having the worst marbles and what drivers do to avoid running over them. And if you happen to know someone who owns an above ground pool, check out our favorite above ground pool cleaners too.

After you finish reading this article, you’ll be in a better position to decide whether you should buy a steam cleaner, rent a carpet cleaner, or simply call in the professional carpet cleaners. It’s possible to pop off the steam head, leaving a scrubby triangular brush which is amazing at picking up stubborn areas of dirt and grime. For small areas, a household hand brush can work such a compound into carpet pile; working like “tiny sponges”, the attracted cleaning solution dissolves dirt, and dirt and grime is attracted/absorbed to the compound. It is a measure of the loss of electrons or oxidation of an atom in a compound. Once you’ve determined which spa chemicals you need to add and how much, measure them out. He set out to change that. You can remove this by sliding or popping it out of place (refer to your manual for guidance). Gallium is a rare, silvery white element that can pull off one of the coolest parlor tricks on the periodic table. That earns gallium the award for maintaining the longest liquid phase of any element. Mendeleev, known as the “father of the periodic table,” saw that there was a gap in the table after aluminum, so he posited that a missing element he called “eka-aluminum” would share many of the properties of aluminum, but with a different atomic structure.

An area of a plant or facility with numerous storage tanks is sometimes called a tank farm, especially at an oil depot. ­Some race fans may think that these bits of rubber are called marbles because they’re of similar size and shape. You may get more of a sudden immolation than a bear tango, though, depending on how you perform the reaction. This behavior may seem erratic, but drivers are simply cleaning off their tires. They contain mild cleaning agents that soften the makeup particles and remove them from the bristles. These filler agents determine the tire’s softness and its grip. Wrong. Goodyear Racing Eagles, the tires used exclusively in NASCAR’s three series, are extremely sensitive and unsurprisingly lose grip when they’re not in direct contact with asphalt or concrete. During a tire stint, tires go through a change in composition. Believe it or not, races have been won and lost due to these seemingly harmless pieces of used tire.

On oval tracks in NASCAR’s three premier circuits, the Craftsman Truck, Nationwide and Sprint Cup Series, walls act as barriers to keep these pieces of rubber from leaving the racing surface. Marbles are especially prevalent on tracks that only have one racing groove. Several factors make some tracks worse than others, but the effect remains the same: A car driving through the marbles slips and slides all over the place. But cameras are not inherently complex — in fact, the basic elements are so simple you can make one yourself with only a few inexpensive supplies. Not only do LEDs produce light when connected to electricity, but the process can be reversed. But one of the coolest applications of gallium is in light-emitting diodes (LEDs), which are now used in everything from computer displays to traffic lights to luxury car headlights. If something is hand wash-only, now is the perfect moment to hand wash it-this is a deep clean, after all-and if something is dry-clean-only, consider taking it to a nearby dry cleaner.