Nitrites and nitrates in sausage, their useful and harmful properties. Dyes: carmine, cochineal, annattoWhen salting meat products and salting sausages, the use of nitrite inhibits the development of putrefactive and pathogenic microorganisms, in particular, the possibility of deadly botulism is eliminated. In addition, nitrites inhibit lipid peroxidation, make the color of food pleasant pink, and also give food a special aroma and taste. As it turned out, it is often not nitrite itself that is active, but nitric oxide (NO), which is formed during its reduction.
The reduction of nitrites (in raw meat) to nitric oxide occurs independently with a slightly acidic reaction of the environment or as a result of interaction with reducing agents, for example, ascorbic acid and / or its ulcers, as well as under the action of enzymes of denitrifying bacteria.
In addition to the positive effects, sodium nitrite has side effects. Nitrite is a highly toxic substance.
A lethal dose delivers 14-16 mg per kilogram of body weight. At lower concentrations, nitrite causes acute methemoglobinia, especially in young children. This disease is associated with the inability of blood hemoglobin to carry oxygen.
In combination with proteins, nitrite is able to form nitrosamines, which are the cause of cancer (Groote, 2005).
Sodium nitrite and sodium nitrate are considered responsible for the increased excitability of the nervous system in children. High concentrations of nitrites can lead to poisoning and even death (Mashantseva, Laptev, 2006). The fact is that, coming from the intestine into the blood, nitrites bind to the hemoglobin of erythrocytes and prevent oxygen from joining. This causes hypoxia (oxygen starvation) of the body. There are known cases of severe group poisoning with sausages that contain high doses of sodium nitrite. In addition, nitrites reduce the content of vitamins in the body (Kudryashov, Baimishev, 2005).
Once again, it is appropriate to recall here that the lethal single dose of sodium nitrite for humans is only 1 gram. As already mentioned, a person receives, on average, about a double dose per year.It is believed that from 60 to 90% of nitrites enter the human body with vegetables, and only the remaining 40-10% - when eating meat products. However, these figures rather reflect the content of nitrites in vegetables and meat products, rather than ingestion, since the absorption of nitrites with meat amino acids and peptides in the gastrointestinal tract is much stronger than with vegetable fiber, since cellulose (etc. .) is practically not absorbed. This means that "meat" nitrites are much more dangerous than vegetable ".
Due to the existence of problems associated with the side effects of nitrite, the challenge for researchers is either to find a replacement for them, or to reduce the side effect. One of the ways to solve the problem is to create an effective producer of the nitrite reductase enzyme based on the Macrococcus caseolyticus strain, which is used in the production of dry fermented sausages, using genetic engineering methods. The use of effective denitrifying microorganisms can make it possible to achieve low residual nitrite concentrations even in the case of an increase in the applied concentration of sodium nitrite. However, this route is dangerous with toxic side effects.
Using carmine for coloring meat productsColor is the main indicator that affects the consumer properties of meat products. As you know, the consumer “buys with his eyes”.The bright red color of sausages is usually associated with fresh, benign products; pale coloration, on the contrary, has a negative effect on the choice. But if we talk about quality and non-toxicity, then often the opposite is true.
One of the traditional dyes used in the production of meat products is
fermented rice... Recently, however, the quality of the supplied dye has decreased on the Russian market and when used in the technological process, it gives an ugly grayish tint to the cut of sausages. This situation has thus led to the emergence of new types of dyes on the market. They are mainly mixtures of natural and synthetic dyes.
Since the ingredients introduced, such as starch, flour, soy proteins, meat raw materials with PSE and DFD quality defects, as well as raw materials with a high content of fat and connective tissue, reduce the efficiency of coloring the finished product, in order to create a beautiful pink color of sausages, more and more natural dyes are popular, such as
carmine and cochineal.
Carmine - a derivative of tetraoxyanthraquinone, it is obtained by extraction from dried and crushed cochineal insects of the species Coccus Sactis living on cacti.
Cochineal yields a red extract that is used to make the natural dye carmine. Although this dye is natural, it is not clear how toxic it is to humans.
All over the world, the choice of natural dye for the meat industry very often stops at
carmine... This dye has established itself as one of the most stable: it does not show noticeable sensitivity to light, oxidation and heat treatment. In addition, it gives a natural juicy flavor to sausages and gourmet products. Carmine, which is a dark red, fluid liquid, is soluble in water, ethyl alcohol and propylene glycol. This dye can be presented both in dry form and in the form of solutions of various concentrations. As a rule, the powder contains 40-60% carminic acid, in solutions 3-10%. Carmine is used both in the production of raw smoked / dry-cured products and in the heat treatment of sausages.
Carmine in water-soluble form is the only natural color used for injecting boiled ham. It is also widely used for coloring casings in different shades of red (often in combination with annatto). This dye is used to achieve a guaranteed color in the production of meat products; it makes it possible to regulate the degree of coloring of products in accordance with their type and consumer tastes.
The employees of CJSC "Euro Resource" have developed a technology for using a 3% solution of carmine in meat products. The dosages of dye addition to boiled sausages, wieners, sausages of the highest and second grades have been worked out. The dosage of the dye depends on the content of adipose tissue, muscle tissue and plant proteins in the raw material and can vary from 3 to 8 g per 100 kg of raw material. It is possible to guarantee the exact dosage of the dye only under conditions of constant quality of the main raw material. The recommended dosage for cooked sausages of the highest grades is 6-8 g. This amount is dissolved in 100 ml of water and introduced at the first stages of cutting during the stage of processing raw meat. For sausages, sausages of the second grade (products containing minced chicken), it is recommended to increase the dosage of the dye to 24 grams.
To give the product an improved presentation, it is also suggested to use
annatto.
Annatto fruit - a heart-shaped box resembling a beech nut, with a red-brown to purple pericarp, with many prickly hairs that frighten away herbivores. Inside the capsule are thorny seeds covered with a waxy orange-red mass. Their color is influenced by several apocarotenoids contained in the seeds, of which bixin is the most important.
From a technological point of view, annatto is a good dye for coloring casings, both natural (casings) and protein-cosine, as well as for giving the surface of smoked meats a persistent bright color.
Various modification forms of annatto extract are intended for dyeing delicacies (such as shank, meat rolls, etc.) The use of natural annatto dye allows to reduce the smoking time; improves the presentation of the finished product; a change in the dosage of the dye allows you to vary the color range of the surface of the finished smoked meats from pale yellow to bright golden.
At the same time, the biological, medical and toxicological properties of annatto have never been studied and published in detail by anyone.
Source: Biophysics of environmentally friendly meat processing. How and from what sausage is made. Author D. B. N., leading researcher at the Institute of Cell Biophysics, RAS Vekshin N. A.
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