Corn oil - areas of application, benefits for the body, composition will help you understand whether you need to buy it or enough boiled cobs in the summer and popcorn all year round. Read and get healthy.
Composition of corn oil. What vitamins are rich
Corn grains were the staple food of the Mayan and Aztec tribes. The conquerors from Europe quickly appreciated the useful qualities of the plant and brought it home. Since then, various varieties have been bred with much greater fertility and cob size, the chemical composition and biological properties of the components have been studied.Now oil from corn kernels is made in all countries. It is in great demand due to its good taste, ease of use, biological composition, which ensures that a combination of useful substances enter the body.
It is known that the oil contains such unsaturated acids:
- oleic - from 24% to 42%
- linoleic - from 34% to 62%
- linolenic - up to 2%
The content of tocopherols (vitamin E) exceeds the concentration of these substances in other vegetable oils. For example, in olive oil tocopherols are 7 times less.
Corn grains are storehouses of mineral salts that are not lost during technological processing, they are stored in oil.
Who benefits from corn oil
Corn oil is useful for everyone without exception. A variety of dietary intake increases the total amount of biologically active components entering the body.The oil from corn kernels received special value due to the high concentration of tocopherols. Vitamin E is known as a substance that promotes the bearing of the fetus by the mother's body. Pregnant women with the threat of interruption are prescribed medications tocopherol.
As a prophylactic, oil can be consumed in moderation by all women who dream of replenishing their families.
Vitamin E has an increased tendency to bind free radicals, inhibits oxidative processes, promotes rejuvenation of the body, strengthens the immune system.
Important. Tocopherols are useful when ingested with regular foods. Healthy people do not need to take vitamin medications without a doctor's prescription.Corn oil contains a large amount of sterols, substances that normalize cholesterol metabolism. The sterols found in plants are called phytosterols. They are more active than synthetic substances or similar components isolated from animal sources.
Corn oil is useful for all adults and children. There are no data in the literature on intolerance to this product or contraindications to its use.
Applications of corn oil
In our country, corn oil is produced in several forms in accordance with the state standard.
- R brand products are intended for processing and subsequent industrial refining
- SK brand oil is added to margarines, frying and cooking fats, used to obtain a variety of food products
- Oil with the designation D is used for the production of baby and diet food.
- P-marked products prevail in the distribution network; they are also supplied to restaurant and catering enterprises.
For home use, it makes sense to buy oil with the designation P in regular grocery stores with a good reputation. It is useful not only to add oil to salads and other dishes, but also to rub it into the hair roots. Cosmetologists claim that the hair from this procedure becomes more elastic, thick and silky.
If funds allow, you can buy products labeled D for food. It undergoes additional cleaning, so it costs a little more.
Can you fry food in corn oil?
When choosing oil for frying, the amount of oxidation products formed during heating and the rate of smoke are of decisive importance. In corn oil, both indicators have good values, allowing you to safely recommend it for frying. After cooking, the residue does not need to be reused. During storage, harmful substances are formed.The best brands of corn oil on the market
Many enterprises have mastered the technology of obtaining oil from corn grains. This is done by pressing or extraction. Unfortunately, the method of obtaining in most oilseed products is not specified. The composition and quality of products are controlled. If you manage to get information about the technology, then you should choose squeezed oil, not extracted.
In any case, you need to buy products in glass containers, put on refrigerated display cases. Oil in plastic packaging, when stored in the light without a refrigerator, can oxidize and contain harmful impurities.
Responsible domestic and foreign manufacturers indicate the technology of obtaining, terms of implementation, attach quality certificates.
If this information is not available, then it is better to refrain from buying in this trading place.
Comparison of corn and sunflower oil: video
Both types of oil plants feel good in our country. Therefore, there is no shortage of domestic raw materials. Products have affordable prices. It is important for buyers to know which of the oils that are close in cost is better to choose. Each of them has its own merits. Technologists and physiologists believe that it is better to use corn oil for frying. For raw consumption, it makes sense to use both products. The main task is the maximum variety of the diet. The attached video contains a fascinating story about the features vegetable oils.
For example, the plate has following notation: P-A, 1, M, W, E1, 3500x1750x16, GOST 10632-89
Let's break it down by position:
P-A - means chipboard brand.
The standards existing in Russia distinguish two grades of chipboard: P-A and P-B. These brands differ in their physical and mechanical characteristics. Brand P-A more High Quality and has before the mark P-B is the best flexural and tensile strengths and lower percentages of swelling, warping and surface roughness.
1 - chipboard grade.
There are plates of 1 grade, 2 grades, as well as a non-grade plate, used, as a rule, for construction purposes. Let's describe the main differences between the 1st and 2nd grade.
On the plate of the first grade:
protrusions or depressions, tar or paraffin stains are not allowed; chipping of edges and chipping of corners are not allowed (exception - single chips, chipping up to 3 mm and length along the edge up to 15 mm).
On the second grade board:
chipped edges are allowed within the limits of deviations along the length (width) of the slab; on the surface of the plate there may be grinding defects (no more than 10% of the area); on the surface of the slab, inclusions of bark and a large fraction of chips may be present to a greater extent compared to the first grade.
M - view of the outer layer of chipboard.
According to the type of the outer layer, plates with a finely structured surface (M), a regular surface and plates with outer layers of coarse chips are distinguished. The latter are used only for construction purposes and for facing with natural veneer.
Ш - chipboard surface treatment.
Plates are polished (W) and unpolished.
E1 - formaldehyde emission class in chipboard
The emission class shows the permissible content of free formaldehyde in 100 grams of absolutely dry board according to GOST 10632-89. There are two emission classes: E1 (up to 10 mg), E2 (10-30 mg). The manufacture of a plate with a high content of formaldehyde is unacceptable.
3500x1750x16 - chipboard dimensions in mm.
GOST 10632-89 - GOST number on chipboard
In addition, the plates are ordinary and increased (the letter "B" in the marking), water resistance. In the vast majority of cases, boards with ordinary water resistance are used. It is advisable to use plates of increased water resistance for the manufacture of countertops for kitchens, bathroom furniture, as well as for special construction purposes. In the manufacture of waterproof chipboard, a special paraffin emulsion or molten paraffin is introduced into the chip mass before pressing. An indicator of water resistance is swelling in thickness (for 24 hours, the upper limit):
- . ordinary chipboard, brand P-A - 22%,
- . ordinary chipboard, brand P-B - 33%,
- . waterproof chipboard - no more than 15%.
In the process of building a house or structure, as well as in the case of roof repairs milestone is a roofing material. At the moment there are a huge number of them, so optimal choice problematic enough. First of all, such a material must meet the operating conditions, design and loads.
Material Description
Glassine, which performs the function of a vapor barrier and roofing material, is in great demand. The main material is cardboard (intended for roofing), which is further impregnated with bitumen. The cardboard itself includes about 20-40 layers of flax fibers, cotton, wood or straw, rag masses and other components.
The non-woven materials that make up the cardboard are necessary for its good absorbency. Giving glassine the best technical performance is carried out if the cardboard lends itself to a press under a pressure of about 300 g/m2. The material itself has become a modern and improved continuation of roofing felts.
Glassine in construction
Types and brands of glassine
Glassine can be both liquid and roll material. In the first case, glassine is a polymeric water-displacing composition designed to protect a wooden surface from decay. It is used in the construction of baths, log cabins and houses made of wood, as well as in protecting the concrete base of the foundation from the negative effects of moisture.
The second variety is rolled glassine. Its production is carried out in accordance with GOST and is a cardboard that is impregnated with bitumen.
According to the thickness of the cardboard and the type of bitumen, there are such brands of glassine:
- Mark P250. Such glassine has the smallest thickness and at the same time it is characterized by high strength and elasticity. When the material is stretched, the breaking force is from 15 kgf. With a pressure of 0.001 MPa, glassine of this brand will provide protection from water for 10 hours.
- Brand P300. The material is quite strong and elastic. Breaking force in case of stretching - 22 kgf. About 20 hours glassine of this brand will protect the surface from moisture.
- Brand P350. Breaking force - more than 27 kgf, and water absorption - up to 20% of the mass of the material. About 20 hours there will be no sign of water on the surface of the material at a pressure of 0.001 MPa.
It is worth noting that the higher the brand of glassine, the better and more durable it is.
In the photo - liquid and rolled roofing glassine
Liquid glassine Roofing glassine in rolls
Specifications according to GOST
GOST 2697-83 standards apply to glassine, which is a lining material. This material is used as the initial layer of the roofing system.
Glassine grade P350 is a type of roll sized 100, 125 or 150 cm +/- 0.5 cm. total area will be 20 or 40 m2 and weigh 15 kg and 30 kg, respectively. A slight deviation in weight is not a sign of marriage.
Technical requirements and properties:
- The ratio of the mass of bitumen and cardboard is from 1.25 to 1 part of the cardboard.
- Explosive load in the process of stretching from 27 kgf.
- The degree of water absorption (vapor permeability) up to 20%.
- With a pressure of 0.001 MPa, after 10 minutes, no sign of water ingress should appear on the reverse side.
- Uniform impregnation over the entire surface and thickness of the web. When cutting glassine, it should be black, a brown tint is possible.
- The thickness of the matte surface of glassine without irregularities is more than 1 mm.
- No cracks, holes or other damage. A maximum of two tears with a length of 1 cm to 3 cm are allowed along the edges.
- The length of the canvas in a roll is at least 3 m.
- Straight cut ends.
Glassine is a fairly safe material. This is due to the fact that no harmful substances are used in the process of its production, and the production itself does not harm the environment. But at the same time, with an increase in the temperature in the environment, a chemical smell will come from the glassine.
Glassine is new roofing material produced in the form of a roll. It serves as an improved continuation of roofing felts, as it is cardboard impregnated with bitumen. - this is the retention of moisture and steam from their ingress into thermal insulation materials.
Glassine or isospan
Izospan is a vapor and moisture insulating material that protects the building from negative impact moisture both outside and inside the house or building. To do right choice in favor of glassine or isospan, it is necessary to study their advantages and disadvantages.
Benefits of parchment:
- High mechanical strength;
- Low price;
- Availability;
- High resistance to water.
Isospan benefits:
- High strength;
- Environmental Safety;
- Possibility of adding fire-fighting components;
- Moisture resistant.
It looks like isospan 
Disadvantages of parchment:
- Strong smell. It appears when the temperature in the environment rises. Weathered for too long;
- Short service life (5-7 years);
Isospan disadvantages:
- Low strength;
- Lets water through in a horizontal position.
If we compare these two materials, then it is better to choose isospan for vapor barrier of a living space, and glassine will be the best option for a garage, attic and other non-residential premises.
Table 1. Comparative characteristics on a 5-point scale
Glassine or ruberoid
Ruberoid is used as a roofing and waterproofing material. It is made by bituminous impregnation of roofing paper, like glassine, but with an additional coating of both sides with refractory bitumen and sprinkling with talc or asbestos.
Both roofing material and glassine are rolled insulating materials. In glassine, due to the lack of an additional coating, resistance to biological effects is several times worse. In the process of ignition, the roofing material will begin to melt, and the glassine will burn.
Glassine is often used in front of the roofing felt as a heat and vapor barrier. And for waterproofing outside - not suitable. Roofing material, in turn, is able to protect the roof and walls from moisture and the negative effects of the environment.
Table 2. Comparative characteristics on a 5-point scale
The process of making parchment
Works on the production of glassine include a number of stages:
- Unwinding and gluing roofing type cardboard;
- Its watering and impregnation with bitumen in a special bath;
- Additional impregnation with the same composition in the chamber;
- Cooling of finished products;
- Winding in rolls.
In order to make glassine, roofing aggregates of universal use are used, which are designed for most roll materials. Finished products must have a certificate of conformity.
Mistresses around the world use it for culinary purposes. Corn oil is a real find for cosmetologists, because it is able to penetrate into the deeper layers of the skin, is a hypoallergenic product and is suitable for absolutely all skin types and for all ages. And the wonderful vitamin and mineral complex contained in it makes it a product that is quite in demand in medicine. But first things first.
general description
The history of corn oil is relatively short. Many oils were known in antiquity and were widely used for various purposes. And this product was derived from corn germ at the end of the 19th century in the US state of Illinois. It has a pleasant aroma and a pronounced taste. Depending on the type and method of processing, it acquires a different color: from a light, pale yellow hue to a rich red-brown.
Chemical composition
Corn oil high-calorie product. His the energy value equal to approximately 900 kcal per 100 grams of product. Chemical composition represented by saturated and, vitamins, and. It also contains the presence of lecithin and. It is incredibly rich in vitamin E. Its content in this product is much higher than in other vegetable oils. For example, in olive oil this vitamin is two times less. As you know, it is this vitamin that is responsible for youth, beauty, participates in the process of regeneration of skin cells and slows down aging. That is why corn oil is so highly regarded by cosmetologists and nutritionists around the world. It does not include and. The number exceeds 99.9%. But with all this, it is an easily digestible, dietary product.
Types and brands of corn oil
Like many other representatives of vegetable oils, corn has several types: refined and unrefined. In turn, refined corn oil for various applications It is further divided into two types: deodorized and non-deodorized. By the way, deodorized there are several brands.
Types and brands of corn oil:
- Refined deodorized oil (grade D). Used to make dietary products and baby food products.
- Refined deodorized oil (grade P). It is widely used for deliveries to catering establishments, and to retail chains and systems.
- Refined non-deodorized. This is a refined corn oil with a slight pleasant aroma.
- Unrefined. This is ordinary, unrefined corn oil, which has a specific, rich smell, darker in color than all of the above types. This form contains the most complete composition of useful substances, minerals and vitamins.
Corn oil production
The product is obtained from corn germs in two ways: pressing and extraction. Corn germ makes up about a tenth of the weight of a corn kernel. They are a product of the processing of corn grains in industrial production. Their separation is carried out by wet and dry methods. When receiving corn germs in the wet process, the quality of the oil contained in them will be lower than when using the dry method. And in the embryos obtained by the dry method, great content, which makes it difficult to obtain a product from them by pressing.
Selection and storage
When buying corn oil, you should give preference to well-known brands that use high-quality raw materials in their care for customers and do not allow marriages. It is better to take it in glass bottles, as they retain the beneficial properties of the product better. Pay attention to color and expiration date. A good quality refined oil should be clear, clean, and have a nice, even hue.
Now in stores there is a rich variety of this product of different brands and price categories. You should not choose a cheap option, it is better to opt for an average price.
Unrefined corn oil is best stored in glass in a dark, cool place. The fridge is the ideal place to store it. But the sooner this product is used, the better, since this particular type of oil can acquire an unpleasant odor during storage. Refined products keep much longer. You can store it under any conditions, as it is already a purified product that has absolutely no smell.
Beneficial features
Corn germ oil is widely used in the field traditional medicine. This is very a good product to restore the body after illnesses and for their prevention. Often in the autumn-winter period, especially in the cold, lips crack, which leads to unpleasant and painful sensations. It is recommended to lubricate them with corn oil, which is very rich in vitamin E. This will have a beneficial effect on the condition and health of the lips, soften them and heal the resulting wounds.
If you regularly use this product, you can improve the activity of the gastrointestinal tract, improve the condition of the liver, and normalize metabolism. The use of oil has a positive effect on the cardiovascular system. Some doctors recommend using it for diabetes, disorders nervous system for overweight problems. Vitamin E has a positive effect on the genitals, so it will be useful for pregnant women.
In general, this amazing product has the ability to heal wounds and ulcers, helps with exacerbation of psoriasis, and helps treat eczema. It is also an effective assistant in atherosclerosis: it lowers the content in the blood and thins the blood, which in turn prevents the formation of blood clots. It is worth mentioning that crude oil is more useful in its composition, the content of vitamins and minerals in it is much higher than in the one that has undergone a certain processing.
Benefits of corn oil in cooking
In cooking, this product is used in both purified and unrefined form. Refined oil in this area is valued more, as it does not have a specific smell and there are no carcinogens in it. It is commonly used for frying, baking and other products. Mayonnaise is often made from it. This product, due to its useful properties, has been successfully used in baby food and in the diet menu.
In industrial production, corn oil is also often used.
Unrefined oil, as well as refined non-deodorized oil, is used to dress various salads. Although many recommend using a purified, odorless product for this. Because in this way it will allow you to feel the natural taste and aroma of the components that are included in the dish. In cooking, more and more preference is now given to an easily digestible product from corn, since with heat treatment it does not form harmful carcinogens and its consumption during cooking is much less than, for example, such a popular sunflower oil.
The benefits of corn oil in cosmetology
A real find for cosmetologists is this miraculous product. Such a rich content of vitamin E makes it just a magical elixir for the skin: it promotes regeneration and restoration, helps get rid of acne and unnecessary pigmentation, relieves irritation and inflammation. Unsaturated fatty acids, such as linoleic and oleic, retain moisture well in the body, accelerate metabolism and metabolic processes, which also has a positive effect on the condition of the skin. Vitamin A prevents the formation of wrinkles, smoothes existing ones and, in principle, participates in processes that slow down aging.
Corn oil is suitable for all ages, for all skin types:
- dry;
- oily;
- problematic;
- sensitive;
- fading.
This product will effectively get rid of skin peeling, increase elasticity, heal small cracks and wounds, restore youth and beauty. Masks based on it will get rid of wrinkles, well suited for dry, dehydrated skin. If you regularly lubricate your lips with them before using lipstick, then you can forever forget about peeling and cracks. This product is excellent for the care of rough skin on the hands and feet.
Against cellulite
Corn oil is also a productive remedy for fighting cellulite. Of course, you should not expect magic using only this product and nothing else. For the best effect, it is recommended to use it in complex therapy along with diets and exercise and massage. Also, a positive factor in the complex of measures will be the use of corn oil, in addition to external use. You can, for example, regularly use it for dressing salads.
beauty recipes
To get rid of early wrinkles, a mask of corn oil and egg yolk will be effective. Mix it all up and apply on your face. Wash off with warm water after 20 minutes
Also, honey, corn oil and will help with constant drying of the lips. When mixed, you get a fine scrub that exfoliates dead skin cells and makes lips soft and attractive. Apply scrub, hold for 10-15 minutes. Before rinsing, it is advisable to rub the lips with the composition, for the best effect. Then wash off with warm water.
It is good to use such a product for strengthening and hair growth. To do this, you just need to rub a certain amount of oil into the scalp before washing. Wrap with a warm towel and wash your hair in the usual way after an hour.
Harm and contraindications
There are practically no contraindications to the use of the product. For the most part, it only benefits the body. But you should pay attention to the expiration date, and do not use the product after its expiration. Since in expired oil there is a risk of harmful substances and impurities.
conclusions
Corn oil is a natural source of health, beauty and youth. Every year its popularity is becoming more and more, thanks to its useful qualities and vitamin composition. This product is good for both cooking and medical purposes. Demanded in the cosmetic industry. It is hypoallergenic, and therefore it is widely used in baby food, it is useful for various diets.
It contains substances that have a beneficial effect on the processes of digestion, the circulatory system. This product can thin the blood, being a prophylactic against thrombosis and atherosclerosis. it effective remedy to combat cellulite, early wrinkles and skin aging. Its regular intake will provide the body necessary quantity minerals and vitamins, thereby helping to strengthen the immune system and the general condition of the body.
Various dishes are prepared from corn oil, used for baking, frying, deep-frying. Dishes prepared with it do not contain harmful carcinogens, are harmless and natural. It is not advisable to use the product after the expiration date. When a cloudy precipitate and bitterness appear, it is better to stop using it, as this indicates the presence of harmful oxides that are unfavorable for the body.
Concrete is simply an indispensable material for construction, which is used everywhere. But in order to choose the right type of solution, it is necessary to take into account the main characteristics of the mass, such as workability, draft of the cone and mass mobility. And just about what is the mobility of concrete and will be discussed in this article.
Basic terms and definitions
Before defining the main characteristics of the solution, it is necessary to clearly understand what this construction material.
Concrete is a composition consisting of four main components:
- Cement;
- Sand;
- Water;
- Rubble.
Note! If in, then it's just cement.
The main task . Achieving this goal is possible only if the correct proportions of the two main components such as water and cement are observed.
Sand and crushed stone are referred to as composition fillers, and are used to give strength to the mass and reduce possible deformations of a monolithic product after solidification. It is these fillers that make up the structural frame of a monolithic product, which makes it possible to increase the elasticity of the structure and reduce deformations under severe loads.
Mobility
The mobility or elasticity of the solution is an important property that can affect the choice of material for the construction of buildings and structures for various purposes. Mobility is the ability of a mass to fill the form in which it is placed.
Note! The ability of the mass to fill the form can be manifested both under the influence of external forces and under the influence of its own mass.
Mobility concrete mix according to GOST, it is divided into 4 categories from p2 to p5, depending on the amount of added liquid. The less liquid, the thicker the solution, the thickest has an indicator of n2, the most liquid, respectively, n5.
In terms of plasticity, building materials are divided into 2 groups:
- Slow-moving mixtures or rigid. They contain a small amount of water and are not capable of filling the form in which they are placed under the weight of their own weight without the influence of external forces. Such compositions have indicators n2 or n3. Laying of a slow-moving mass is carried out using vibrating and compacting equipment, which allows you to remove voids from the monolith;
Advice. If construction work using rigid concrete is carried out in winter, the solution must first be heated.
- Mixtures with high mobility, liquid or pourable. Solutions of this type have indicators equal to n4 or n5. Such masses are used in the process of pouring formwork, heavily reinforced products and do-it-yourself columns.
Dilution with water
The low elasticity of the material can significantly increase the time for construction work, provided that the necessary equipment is not available at the construction site. And in order to solve this problem, many resort to the dilution method, making mixtures of p2-p3 mixtures of p4-p5.
If the compaction is done correctly and the thinning method is eliminated, you will get a solid, reliable structure that can be machined by methods such as cutting reinforced concrete with diamond wheels and diamond drilling holes in concrete.
Mobility indicators
In the case when the concrete grade for mobility was chosen correctly, but it is ordered from the supplier and you have doubts about the compliance of the delivered product with the declared characteristics, and the price of the mixture is not so low, then you can check at the construction site.
The determination of the mobility of the concrete mixture can be made directly during unloading in 2 ways:
- Determination by the monolith analysis method;
- Cone for determining the mobility of the concrete mixture.
Elasticity determination by monolith analysis
The instruction for such a check stipulates the possibility of determining any indicator of the plasticity of the mixture:
- Before starting the test, several cube-shaped boxes with a side size of 10-15 cm should be built from wooden boards;
- Before pouring concrete into prepared forms, the wood should be slightly moistened to prevent moisture from being taken from the solution;
- The solution is poured into boxes, after which the mass must be pierced with a sharp bar of reinforcement, thus compacting the monolith and releasing air;
Advice. Additional sealing can be achieved by tapping the sides of the drawers with a hammer.
- The cubes must dry for 28-30 days at a temperature of at least 20 0 C and a humidity of at least 90%;
- After the created samples dry, they should be sent to the laboratory, where the mixture will be checked for compliance with the declared indicators.
A clear disadvantage of this method is its duration, therefore, the method of determining plasticity using a cone is more often used.
Determination of elasticity by a cone
In the photo - a diagram of the cone
To apply this method, you will need a cone to test the mobility of concrete with a height of about 30 cm. In this form, no more than 6 liters of material should be placed.
This check is performed as follows:
- The cone is filled with a solution;
- Concrete is bayoneted to compact and remove voids;
- The cone is removed and placed next to the solution;
- We perform an elasticity test:
- If the concrete settlement is 5 cm, then you have hard concrete;
- If the draft is more than 5 cm, then you have moving concrete in front of you.
Finally
When working with concrete, it is necessary to choose the right brand of material in accordance with the elasticity of the mass and the purpose for which it will be used. Well, if you doubt that, for example, the mobility of P3 concrete, it is easy to check using the methods described.
The video in this article will tell you even more about how important it is to correctly select concrete in accordance with the mass elasticity parameters.
