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How does lemon juice prevent apples from turning brown?
Apples turn brown because of oxidation. Oxygen in the air reacts with a natural substance in apples called phenolase and turns the surface brown. Mild acids like lemon juice can stop this reaction. Thus tossing pieces of apple with a little lemon juice will keep them from turning brown.Lemon helps this process in two ...
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There are some people who can remember almost every single day of their lives.
Researchers at University of California have evaluated more than 500 people who thought they might have highly superior autobiographical memory. The scientists confirmed just 33 cases, including the 11 in the study, but identified another 37 strong candidates who need further testing. Most of these differences, unsurprisingly, were in areas associated with autobiographical memory. The participants ...
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Your stomach acid is strong enough to dissolve razor blades.
Human Stomach Acid ( Gastric Acid) is essential for protein digestion. Pepsin is an enzyme which is needed for digesting the protein which is triggered by the stomach acid. Proper levels of HCI acid ( Hydrogen chloride) in the stomach are also your first line of defense against bacterial and viral infections. All day long ...
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A study shows hangovers don’t affect test scores.
According to a study conducted by researchers at Boston University and Brown University, consuming alcohol to the point of a hangover does not affect test scores the next morning. Participants in the study scored same on a practice Graduate Record Exam and a quiz on a lecture after a night of drinking, than they did without ...
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Twins can be born where one is black and the other is white.
Having a black and white twin is not a big deal. Identical twins develop from one zygote that splits and forms two embryos. Fraternal twins are two eggs that have been fertilized by separate sperm. An assortment of genes go into the egg and sperm to get skin color. Geneticists say that racial differences involve many genes and ...
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Sugar doesn’t make kids hyper.
Studies have shown that sugar doesn’t make kids hyper. There have been at least twelve trials of various diets to investigate different levels of sugar in children’s diets. Both short term and long term experiments were performed, none of them detected any differences in behavior between children who had eaten sugar and those who hadn’t. These studies included sugar from candy, chocolate, and ...
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New ultra fast camera from MIT makes it possible to see how light moves.
MIT Media Lab’s Camera Culture group in collaboration with Bawendi Lab in the Department of Chemistry at MIT developed a digital camera capable of capturing data so quickly that we can actually watch light itself unfold in slow motion. Researchers claim the camera captures roughly one trillion frames per second worth of visual data, yet it still has its ...
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Why is evaporated milk sold in soldered cans?
Soldered Cans are difficult to open with a can opener. Soldered cans are stronger than regular aluminum or tin cans. evaporated milk is actually sterilized in the can, soldered cans to be more durable during the intense heating process. Most of the cans are welded with double seams in two pieces. The bottom and sides are actually ...
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Why do snakes dart out Their Tongues?
Snakes don’t sting or use their forked tongues as weapons. The tongues are perfectly harmless. The tongue is actually an invaluable sensory organ for the snake. It enables the reptile to troll for food (just as a fisherman sticks his line out in the water and hopes for the best), while feeling its way over the ...
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Why is one side of wrap aluminum foil shiny and the other side dull?
Foil starts as a large block of solid aluminum. Aluminium foil is made shiny on one side and dull on the other by heavy rollers used to roll out the foil in the manufacturing process. The side that comes in contact with the rollers becomes shiny and the side that does not is dull. It makes ...
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Why are people immune to their own body odor?
When compared to most animals, humans don’t have an acutely developed sense of smell. According to Dr. Pat Barelli, secretary of the American Rhinologic Society, “The olfactory nerve easily becomes ‘fatigued’ in areas where there are odors.” In order not to be overloaded with information, your nervous system decides not to even try being “bothered” by your body odor ...
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Why does a newspaper tear smoothly vertically and unevenly horizontally?
Newsprint is made up of many wood fibers. The fibers are placed on printers in pulp form, consisting of 80 to 90 percent water, the newsprint dries while in the machine. The printing machines are designed to line up the fibers in a horizontal position to add tear strength to the sheet vertically. The basic purpose of lining up the ...
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Why do tire manufacturers make so many varied tread patterns?
A tire must provide traction for acceleration and braking and it must move surface water out of the way so that the tire can touch a wet road without aquaplaning. Different types tread patterns are used to suit for different types of road conditions. At 60 miles per hour in moderate rain, a car tire has to displace ...
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Titanic remains can explode if they are brought to surface from the seabed.
There are several forces working inside the titanic remains for this strange behavior. First being, cast iron contains small gas cavities that are formed beneath its surface. Secondly, it has low ductility, and will fracture rather than deform. When immersed in an electrolyte such as sea water, electrolytic corrosion starts. Hydrogen is one of the ...
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Why do all Dentist offices smell the same?
All dentist offices smell alike, is probably due to eugenol, a colorless or pale liquid that is the essential chemical constituent of clove oil. Dentists combine solutions of clove oil or eugenol with a mixture of rosin and zinc oxide to prepare a protective pack after gum surgery or as a temporary cement. Eugenol is also used as an antiseptic, ...
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Why do dogs Smell foul when they get wet?
First of all, not all dogs do smell funny when they get wet. Simple rashes and skin irritations are a common cause of canine body odor, and that water exacerbates the smell. When your dog isn’t bathed or groomed on a regular basis, his hair collects all kinds of dirt, including morsels of dried food stuck to the ...
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Why do ants tend to congregate on sidewalks?
Researchers has found several reasons behind this bizarre behavior of the ants. Some species like “pavement ants,” prefer to nest on sidewalks and under rocks and other hard surfaces. Ants release a perfume trail, called pheromones, from the nest to food sources. Pheromones are easily detected on sidewalks, thus they make easy path. Sidewalks absorb and store heat, and ...
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Is it possible to calculate how much water is in a particular cloud?
The amount of water inside a cloud is the same amount of water in the clear air around it. The difference between the two states is caused by temperature differences rather than the water content. The higher part of a cloud contains water in the form of ice crystals, and lower part contains the mixture of ...
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Why are eggs egg-shaped?
An egg is an organic vessel in which an embryo first begins to develop. The strongest shape of all is a ball, or sphere. But if you were to push or gently nudge a spherical egg, it would roll away downhill, never to be seen again come to a stop with the pointed end ...
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Why is bicycle more stable once it’s moving?
When learning to ride a bike we train ourselves to cancel out the wobbling we get on starting off by shifting our weight slightly. The gyroscopic effect of the spinning wheels starts to take effect, making the bike even more stable. Dr Ron Harrison said that the dynamics of anything involving spinning bits is ...
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Why do we yawn?
A yawn is a reflex of simultaneous inhalation of air and stretching of the eardrums, followed by exhalation of breath. Pandiculation is the act of yawning and stretching simultaneously.Yawning is commonly associated with tiredness, stress, overwork, lack of stimulation and boredom, though recent studies show it may be linked to the cooling of the ...
