How Does Gelatin Work?

the brand name Jello. Hundreds of recipes use flavored gelatine to create everything from your simple institutional style squares to rinate designs that incorporate varied flavors, fruit and whipped toppings. Jello and similar mixes consist of five basic ingredients gelatine, water, sugar or artificial sweetener, flavorings, and food coloring. The gelatine is what allows you to mold the stuff into whatever shape you like, solid room temperature, but melt in your mouth.

But let's break down why gelatine behaves that way. Gelatine is a processed version of a structural protein called collagen that occurs in many animals bodies, including humans, called and makes up almost one third of all the protein in the human body. It's a fibrous protein that strengthens the body's connective tissue and allows them to be elastic, that is, to stretch without breaking. As you get older, your body makes less collagen, and individual collagen fibers become increasingly cross

linked with each other. One might experience this as stiff joints due to less flexible tendons, or wrinkles due to the loss of skin elasticity. Gelatin can also be made from the collagen in the bones, hides, and connective tissues of cows or pigs. Today, the gelatin and jello is most likely to come from pig skin. Collagen does not dissolve in water in its natural forms, so it must be modified to make gelatin. Manufacturers grind the animal parts and treat them with either a strong acid or a

strong base to dissolve the collagen. Then the pre treated material is boiled. Controls every step of the process and sure purity and safety. The materials are washed and filtered repeatedly. During this process, the large collagen protein ends up being partially broken down. The resulting product is a gelatin solution. That solution is chilled into a jelly like material, then cut and dried in a special chamber. At this point,

the dried gelatin, about ten percent water, is ground. If it's going to make a flavor gelatine product like jello. You'll be ground into a fine powder. When you buy a box of whatever brand of flavored gelatine at the grocery store, you get a small packet of the powdered gelatin with a sweetener, flavorings, and colors added at room temperature. The gelatin protein is in the form of a triple helix, and this is a fairly ordered structure, not entirely unlike

that of DNA. With DNA, two chains of nucleotides are twisted together in a spiral pattern, resembling a ladder. It's a design known as a double helix. In the gelatin protein, three separate chains of amino acids called polypeptide chains have lined up and twisted around each other. So to make this dried gelatin able to fill out and take the shape of a mold, you first add boiling water to the powdered gelatin. You then stir the mixture for about

three minute until the gelatine dissolves completely. But what happens to gelatine when you add that boiling water. The energy of the heated water breaks the weak bonds that hold the gelatine strands together, their helical structure unwinds and you're left with free floating protein chains. Next, you add cold water and refrigerate the gelatine mixture, which makes the chains begin to slowly reform into their tight triple helix structures.

As it cools, the mass acts like a sponge, soaking up the water that you added, But in some places there are gaps in the helix, and in others there's a tangled web of these polypeptide chains. The chains form a sort of net, and the net traps water inside pockets between the chains. This protein net is strong enough that the gelatine will hold the shape into which it's been molded, but because of the water trapped in the pockets, the mold has that characteristic jiggle. But gelatine isn't just

for making fun molded salads or desserts. Gelatine is a common ingredient in foods. Because it's so versatile, it can also be used as a thicken to give foods a more pleasing texture, into emulsify or stabilized processed foods like yogurt or cake frosting. It's used to clarify juices, vinegars,

and even beer. Special gelatins are made from only certain animals or from fish to meet the standards of folks who don't eat products made from the mammals that are usually involved, and vegetarian and vegan substitutes made from extracts of gooey stuff like seaweed are available to the range of those products that gelatin can be found in is legion.

Everything from dairy and dairy substitute products like sour cream, margarine and cream cheese, to sweets like gummy bears and marshmallows, to process meats like sausage and canned ham, to soup sauces, gravies, jellies, and even whipped cream. It's the coating for pills that makes them easier to swallow. It's in some lozenges and ointments, and cosmetics may contain a form of gelatin that doesn't gell You might see it on the label as hydrolyzed collagen.

And gelatins aren't just used in foods and health and cosmetic products. It's also commonly used in the manufacture of photographic films and papers, uch heads, sand paper, glossy printing papers, playing cards, and simulated human tissue for testing guns and ammunition, and for forensic science. It's even sometimes used to hold down the hair of synchronized swimmers in place. Today's episode was written by Linda C. Brinson and produced by Tyler Clang.

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