What is biovalence BV , what is digestibility, TD, and what is effective PE

Amway's things like to make some mysterious things fool people, in fact, it is no different from the ordinary

Biological value of protein IIV of PRNLEIN), a biological term, is a measure of the nutritional quality of eggs in food, measured by the percentage of nitrogen absorbed by protein that is digested and absorbed in the body.

Biological value of protein: It refers to the part of the protein that can be stored and utilized by the body after digestion and absorption, which can be measured by nitrogen storage method. Protein biological value = stored nitrogen Absorbed nitrogen * 100.

The closer the ratio of essential amino acids of a food protein to the ratio of essential amino acids required by the human body, the higher the biological value of the food protein. By eating coarse grains and fine grains, meat and vegetarian foods, it can play a complementary role in protein, which is more conducive to health.

Evaluation indicators. The nutritional value evaluation indicators of food protein are as follows: The content of protein in food. This is the basis for evaluating the nutritional value of food protein, only with high protein content and good other indicators, can the daily needs of the human body be met.

The protein content of food is generally determined by the Kjeldahl method, which is multiplied by the measured nitrogen content to obtain the protein content of the food. Soybeans had the highest protein content (30% to 40%), followed by meat (12% to 20%), and cereals and cereals (< 10%). Protein digestibility.

Refers to the degree to which proteins are broken down by digestive enzymes. The high digestibility indicates that the protein is likely to be digested and utilized, and its nutritional value is also high. The digestibility of animal protein is generally higher than that of plant protein, such as 98% for protein, 97% for milk, and 79% for steamed bread.

In addition, the digestibility of food is also different for different processing methods, such as 60% for soybeans and 90% for tofu. The biological value of protein refers to the part of the human body that can be stored and utilized after protein is digested and absorbed. The highest biological value of food protein is egg yolk, and the lowest is sorghum. [1]

The biological value (BV) of a protein, or biological valence for short, is the ratio of the body's nitrogen storage to nitrogen uptake. The higher the BV, the higher the degree of protein utilization by the body, and the less oxidative heat production, indicating that the proportion of amino acids is close to the needs of the human body. If a kidney patient is given a protein supplement, the protein with a high BV value should be supplemented, because the less energy is used for oxidative thermogenesis, the less burden on the kidneys.

Biovalence (BV) = Nitrogen Retained Nitrogen Absorbed 100 = 100

BV is a copper core PVC insulated wire, and BV-4*25+1*16 is 4 copper core wires with 25 and 1 grounding 16.

Do you want to calculate the length of BV-4*25+1*16 lines? (half circumference of the box + pipe length) *5

BV stands for plastic copper wire, 2*4 represents two 4 square wires, +1*4 represents one 4 square protective wire, and (PE) PC20 represents pipe (PE) or PC 20

BV wire stands for vinyl chloride copper core insulated wire.

PE stands for ground wire.

bv-2*4+1*4(pe)pc20

Among them, 2*4 refers to a live wire and a neutral line, and 1*4 (PE) refers to a protective grounding wire.

PC refers to plastic conduit PVC20.

The whole meaning is 3 copper core insulated wires of 4 square millimeters, which are laid through 20mm plastic conduit.

The correct name of the BV wire is: copper core PVC insulated wire. From the inside to the outside, they are copper conductors and polyvinyl chloride, and polyvinyl chloride wraps the copper conductors inside, and polyvinyl chloride is our usual "plastic".

Core: oxygen-free copper (oxygen-free copper is one of the best conductive materials for wire and cable conductors on the market, with the advantages of good conductivity and high melting point).

The correct name of the BV wire is: copper core PVC insulated wire.

Let's take a look at the basics of wire model representation and name.

The naming of wire and cable products has the following principles:

1. What is included in the product name:

1) The name of the product, application or size.

2) Product structure material or type;

3) Important features or additional features of the product.

Names are basically in the order described above, and sometimes features are written in front of or before the corresponding structural description in order to emphasize important or additional features.

2. The order in which the structure is described.

The product structure is described according to the principle from the inside to the outside: conductor - > insulation - > inner sheath - > outer sheath - > armor type.

3. Simplify. In the case that it will not cause confusion, some structural descriptions are omitted or abbreviated, such as aluminum conductors are not allowed in automobile wires and flexible wires, so conductor materials are not described.

In fact, there is no strict boundary between "wire" and "cable". Generally, the products with a small number of cores, small product diameter and simple structure are called wires, those without insulation are called bare wires, and the others are called cables; The larger conductor cross-sectional area (more than 6 square millimeters) is called a large wire, the smaller one (less than or equal to 6 square millimeters) is called a small wire, and the insulated wire is also called a cloth wire.

Model: The model composition and sequence of wires and cables are as follows:

1: Category, use] [2: Conductor] [3: Insulation] [4: Inner sheath] [5: Structural features] [6: Outer sheath or derivation] - [7: Use characteristics].

Items 1-5 and 7 are represented by pinyin letters, and polymer materials are represented by the first letter of the English name, and each item can be 1-2 letters; Item 6 is 1-3 numbers.

The principle of omission in the model: copper is the main conductor material used in wire and cable products, so the copper core code T is omitted, except for bare wires and bare conductor products. Bare wires and bare conductor system categories, power cables, magnet wire products do not indicate the category code, electrical equipment wires and cables and communication cables are not listed, but the sub-category or series code is listed.

Item 7 is a mark for various special use occasions or additional special use requirements, which is marked with pinyin letters after "-". Sometimes, in order to highlight the item, the item is written first. Such as ZR- (flame retardant), NH- (fire resistant), WDZ- (low smoke halogen-free, enterprise standard), -TH (for hot and humid areas), FY- (termite-proof, enterprise standard), etc.

BV wire: 1The classification and use are used to distribute the current, which belongs to the category of cloth wires and is represented by the letter "b";

2.The conductor material is copper, which is represented by the letter "T", and the copper core conductor is omitted in the cloth wire;

3.The insulating material is polyvinyl chloride, which is indicated by the letter "V";

The type and name of the wire.

4.The structure of the cloth wire is simple, in addition to the above three points, some also have a sheath, and the sheath material is polyvinyl chloride, which is also represented by the letter "V"; If the sheath material is rubber, it is indicated by the letter "X". If there is no sheath and there is no back, there is no need to indicate it.

For example, BVV stands for copper core PVC insulated PVC sheathed round wire.

Electrician knowledge and plumbing knowledge sharing.

BV wire, referred to as plastic copper wire, the full name is copper core PVC insulated cloth wire. B stands for cloth wire, and V stands for PVC insulation.

BV wire means copper core PVC insulated wire, we have contracted the project for a long time, this kind of cable is still a plastic cable or electric cable is better, but the price of electric cable is higher, the cable quality is flexible, not easy to break, more recommended.

What does it mean to be bv, bvr, zr, rvvp on cable wires? The old electrician teaches you step by step, simple and practical electrician technology!

This is a way of marking the specification of the line, and there is no special meaning for the logo to be a type.

BV wire is a kind of copper core PVC insulated wire, and this cable needs to choose not easy to break, strong conductivity, low resistivity, you can choose Meihe cable, plastic cable and Dianli cable, of which the price of Dianli cable will be relatively high.

"BV wire is a single-core hard conductor unsheathed cable, which is composed of copper conductor and polyvinyl chloride, which has the advantages of good conductivity and high melting point, and is currently the best conductive wire on the market. ”

Now there are too many fake national standards, 90% of the online and offline markets are fake national standard wires, so buy wires to choose listed brands, I recommend you to buy Henan Tongda wire, listed companies + China's top 500 + China's famous brand + national inspection exemption + China's leading enterprises + China's well-known trademarks, ***** is not expensive. It is the lowest in the true national standard.

Proteins, carbohydrates, fats, vitamins, minerals and water.

Essential nutrients include six categories: proteins, lipids, carbohydrates, vitamins, inorganic salts and trace elements, and water.

Water, inorganic salts, sugars, proteins, fats, vitamins.

Proteins, fats, sugars, minerals, vitamins, water.