Biology How to divide whether it is dry weight or fresh weight

Fresh weight: the weight of the fresh plant as soon as it is collected;

Dry weight: 80

Constant weight after a certain period of drying underneath.

The water content of the plant body (fresh weight, dry weight) fresh weight.

Different species of plants have different water content. In general, aquatic plants are larger than terrestrial plants, and herbaceous plants are larger than woody plants. For example, aquatic plants have the highest water content, which can reach more than 90%; followed by herbaceous plants, with a water content of 70% to 80%; The water content of lower plants grown in arid environments is only about 60%.

The same plant grows in different environments, and the water content also varies. Generally speaking, plants that grow in shade, humid environments have a higher water content than plants that grow in sunny, dry environments.

The water content of different organs and tissues of the same plant also varies greatly. For example, the water content of roots, young stems or the front of stems, young shoots and green leaves is 60% to 90%, trunks are 40% to 50%, dormant buds are 40%, and air-dried seeds are 10% to 14%. It can be seen that the part with more vigorous life activities has more water content.

The same plant, the same organ or tissue has different water content at different times.

A seed that is dried in the sun is obviously fresh weight, as it also includes bound water.

Dry weight refers to the quality of substances other than water, including the other six categories of nutrients in addition to water, and when you say seed, it is obviously fresh weight, because it also includes bound water.

Look at the content of each ingredient.

The amount of oxygen is more than carbon, which means that it is fresh weight (the moisture is still there); More carbon than oxygen indicates that this is dry weight (mainly protein).

Look at the density. The higher density is fresh weight, and the lower density is dry weight (I was a science college entrance examination student last year, and now I remember that the density is larger, it seems to be fresh weight).

The weight of the creature without any treatment is the fresh weight. After dehydration, it is dry weight.

Dried seeds. Dry weight

Fresh weight includes moisture.

In fact, it is enough to see if there is water in the mentioned weight.

Organic matter is dry weight, and inorganic matter and organic matter together are called fresh weight.

29 Micro Lesson Vegetable Packets in Instant Noodles - Dry Weight and Fresh Weight in Seed Germination.

Dry weight is the weight of a living organism that has completely lost water;

Fresh weight is the original weight.

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Fresh weight refers to the weight of a plant body or cell measured in its natural state. Dry weight refers to the weight of a plant body or cell measured after it has been drained of water.

1. Fresh weight: refers to the weight measured by organisms (or cells) in their natural state. 2. Dry weight: refers to the weight measured by the organism (or cell) after removing the water.

In terms of chemical elements, the element that accounts for the most fresh weight of the organism is O, and the element that accounts for the most dry weight of the organism is C.

The difference is huge. Dry weight is the weight after drying. Fresh weight is the weight after direct picking.

Fresh weight: refers to the weight of an organism (or cell) measured in its natural state. Dry weight: refers to the weight of an organism (or fine leucophores) after removing water.

Fresh weight introduction: Fresh weight is the water in the living state, such as fresh vegetables. Refers to the mass of the cell in its natural state.

Dry weight profile: The weight of the cells after removing free water, and the measured weight after drying and maintaining a constant weight.

Brief introduction of Zoomlion: Due to the attraction of the geocentric ridge, the object has a downward force, which is called gravity, also called weight. It is a measure of the force of a body after being subjected to gravitational force, which differs in weight and mass, and is measured in Newtons.

Dry Chongqing staring is to remove the weight of moisture. It is the weight of the cell's living substance. Fresh weight is the weight that contains water and is the total weight.

There is no uniform definition of cell, and the more common term is that cell is the basic structural and functional unit of living organisms.

It is known that all organisms except viruses are composed of cells, but the life activities of viruses must also be reflected in cells.

The common substance of living organisms is based on the fact that proteins and nucleic acids are contained in the basic components of the substance. The structural basis of an organism is:

With the exception of a few species such as viruses, living organisms are made up of cells. Viruses do not have a cellular structure and need to rely on host cells to reproduce, so life needs cells to behave, and viruses are no exception.

The total biomass is the total weight of all existing organisms (including animals, plants and other organisms) of a species or community per unit area in a certain space and time.

Biomass is an ecological term or plant quantity, which refers to the total amount of living organic matter (dry weight) (including the weight of food stored in the organism) per unit area at a certain time.