What makes shrimp come of? Why salty prawns are cooked

The exoskeleton of shrimp and crabs contains a protoascopanthin in the pigment zone.

It is a carotenoid.

The pigment is originally orange-red, but it can be combined with different kinds of proteins to change to other colors such as red, orange, yellow, green, blue-violet, etc. When the protein is destroyed, denatured, or separated from the original astaxanthin, the color changes to the original orange-red, so the shell of the shrimp and crab will turn red after cooking. In the cortex under the shell of crabs and shrimps, there are many pigment cells, which can show different colors, and with the light and darkness of the environment, these pigment cells can also stretch or contract, when the environment is brighter, the pigment cells will stretch, the color of shrimp and crabs will be more distinct, and when the environment is darker, the pigment cells will contract, and the color of shrimp and crabs will not look obvious.

Under normal conditions, the shells of live crabs and shrimp are turquoise. However, when the crabs and shrimps are put into the pot, most of the pigments are decomposed when they encounter high temperatures, and only astaxanthin is not afraid of heat, and will not decompose when encountering high temperatures, but will show bright red, so the cooked crabs and shrimps will become red. It's because of the shrimp.

Crabs originally contained a substance called astaxanthin.

will make the whole look green. When boiling. Because of the oxidation of astaxanthin.

So turn red! Among the carotenoids, the reduction of astaxanthin is the most important, which is the main substance that constitutes the red color of shrimp and salmon Prooriginal astaxanthin exists in the shell of shrimp, because it is combined with protein, so it becomes blue-purple, and once heated the protein denatures.

It immediately returns to its original red color, but when it is combined with protein, it still appears yellow. Tangerine. Or red, which is why some shrimp or crabs are red in their shells when they are alive, why do shrimps and crabs turn red when cooked?

It's about chemistry. It turns out that there is a bright red pigment in the shells of this cooked shrimp and crab. If you dip the red shell of a scared crab into a kind called acetone.

This pigment will dye acetone a beautiful orange red, and the shell will fade and lighten. Later, someone isolated this pigment from lobster eggs and called it astaxanthin. Astaxanthin-containing animals are not only shrimp and crabs, but also many crustaceans.

Also use astaxanthin to dress yourself. Some small shells mainly contain fenocyanins, and some crabs contain pterenthin. These pigments, including astaxanthin, have a similar structure to carotene, and they are abundantly and widely distributed in nature.

The chemical name is ketone carotenoids, and they are the main components of the pigments contained in animals such as "shrimp soldiers and crabs". The body color of living crustaceans varies depending on the species and the environment, but no matter what the body color of the living "shrimp soldier crab" is, as long as it is soaked or heated with formaldehyde, it will also turn red. This is because the pigment protein in the organism is denatured when it is heated, and the pigment that was originally bound to the protein "escapes" out, revealing the red color.

In addition, after death, shrimp and crabs, due to the denaturation of proteins in the body, the pigment escapes, and the shell will also turn red.

You're asking interestingly, how good might you ask our ancestors who came from?

The reason why saltpan shrimp are cooked is because raw saltpan shrimp are not easy to preserve, and cooked saltpan shrimp can be stored for a longer time after freezing.

Yantian shrimp are shrimp that grow in high salinity seawater. The salt content of the growing water is 2-3 times that of ordinary seawater, so the content of astaxanthin in the shrimp is higher, and the fiber of the shrimp meat is coarse.

Yantian shrimp is mainly distributed at the junction of fresh water and seawater in Bohai Bay, with abundant microorganisms as natural bait, the original natural sun-dried salt field, and the vast tidal flat resources and wetland environment with 2-3 times the salinity of seawater formed over time, which is simply an excellent place for Yantian shrimp to grow.

Yantian shrimp is rich in nutrition, delicious taste, can cook a variety of delicacies and make a variety of leisure and flavor foods, rich in protein, and rich in calcium, magnesium, phosphorus, potassium, iodine and other trace elements and vitamin A.

Summary. Taxonomicly, shrimp belongs to the phylum Arthropods of the animal kingdom, Crustacea, molluscary subclass, Decapod, Swimming Suborder (this suborder refers to various shrimps), crab belongs to the animal kingdom, Arthropodia phylum, Crustacea, molluscary subclass, Decapod, reptile suborder, brevus (brev, that is, the real crab, and hermit crabs), Decapod is the highest crustacean, the name ** is 2 crustaceans plus 8 legs, just full of three categories, including shrimp, crab and crooked tail. Among them, shrimp is the primitive type, crab is an evolution of shrimp, and crooked tail is between shrimp and crab (such as armored shrimp and hermit crab).

It should be noted that some other crustaceans that are not decapitan are also called shrimp, such as krill, mysis shrimp, and shrimp are not decapitated.

Taxonomicly, shrimp belongs to the phylum Arthropods of the animal kingdom, Crustacea, Molluscular Lead, Decapod, Swimming Suborder (this suborder refers to various shrimps), Crab belongs to the Animalia kingdom, Arthropod phylum, Crustacea, molluscary subclass, Decapod, Reptile Suborder, Short-tailed Dippa (Brachytail is the real crab, and hermit crabs are not true crabs), the Decapod is the highest crustacean, the name ** is 2 crustaceans plus 8 legs, just full of three categories, including shrimp, crab and crooked tail. Among them, shrimp is the primitive type, crab is evolved from shrimp, and crooked-tailed spring is between shrimp and crab (such as armored shrimp and hermit crab). It should be noted that some other crustaceans that are not decapitan are also called shrimp, such as krill, mysis shrimp, and shrimp are not decapitated.

All arthropods evolved from annelids ......Jiezhi Dongwu Men (Huashi) Arthropod Phylum (Fossil) Sakura Arthropoda (Fossil) Arthropod phylum is the largest phylum whose exoskeleton can form fossils. Arthropod fossils have been found since about 71 billion years ago, and have appeared in large numbers since the Early Cambrian. Many arthropods have been used in the past as standardized stones for stratigraphic comparison.

It can also be used to indicate a deposition environment. Evolutionary history Arthropods evolved from annelids, such as body split segments.

Shrimp is a kind of long-bodied animal that lives in water, belonging to arthropod crustaceans, with many species, including green shrimp, river shrimp, grass shrimp, crayfish, prawns, prawns, prawns, jiwei shrimp, angler shrimp, lobsters, etc. Shrimp has a high therapeutic value and is used as a Chinese herbal medicine.

What kind of animal is shrimp? Shrimp is a suborder of decapod swimming suborder of crustacea, there are nearly 2 species, most of which live in rivers and lakes.

They all have beards and hooked noses, the dorsal arch is knotted, and the tail has hard scales and feet are good at jumping. Many species are important foods.

The size ranges from a few meters to a few millimeters, with an average of 4, 8 centimeters. Those with large bodies are called prawns.

By curvading the abdomen and tail, it can swim backwards quickly.

Eat tiny creatures, some eat carrion.

Female shrimp can lay 1,5 14 eggs, attached to swimming limbs. There are 5 developmental stages before adulthood.

Its seeds are outside the abdomen, the taste is very fresh, and people like to eat it. The shrimp body is long and flattened, and the exoskeleton is calcareous, divided into two parts: cephalothorax and abdomen.

Shrimp is a kind of arthropod that lives in the water, there are nearly 2,000 finger species, according to the difference between the output and the induced birth**, can be divided into two types: marine shrimp and freshwater shrimp. The shrimp body is long and flattened, and the exoskeleton is calcareous, divided into two parts: cephalothorax and abdomen. The cephalothorax is covered by a carapace and has a bearded hooked nose.

The abdomen is composed of 7 segments, the dorsal arch is knot-shaped, the tail has hard scales, and the feet are good at jumping, and they can quickly swim backwards by the curvature of the abdomen and tail. <

Shrimp is a kind of arthropod that lives in water, there are nearly 2,000 species, according to the production of **, can be divided into two types: marine shrimp and freshwater shrimp. The shrimp body is long and flattened, and the exoskeleton is calcareous, divided into two parts: cephalothorax and abdomen. The cephalothorax is covered by a carapace and has a bearded hooked nose.

The abdomen is composed of 7 segments, the dorsal arch is knot-shaped, the tail has hard scales, and the feet are good at jumping, and they can quickly swim backwards by the curvature of the abdomen and tail. Calling pin socks.