What is the Edge Effect? What does it mean to ignore edge effects

During chromatography, the RF value of the spot near the edge of the thin layer differs from the RF value of the spot in the central region, which is known as the edge effect.

Ignoring the edge effect is: the ideal plate capacitor is shroudedElectric field linesIt's straight, but in practice, it bends closer to the edge, and the closer you go, the more powerful it gets. This curvature is most severe at the edges, and this curvature is called the edge effect.

Otherwise, it is called ignorance.

Ignoring the edge effect, even if the soil conditions are the same, due to the difference in the space occupied by each plant individual, the influence of the connected test area and the difference in microclimate, etc., there will still be differences in plant height, grain number and pest damage between the surrounding part and the first part of the crop.

The edge effect is caused by the grip bend:

1.Temperature effect: Thermodynamics in incubation has been confirmed.

Gradients can be the root cause. Polystyrene for well plates.

It is a poor conductor of heat, and in the routine ELISA assay in the laboratory, when the plate is placed in a 37 incubator from room temperature (the whole section is usually around 25), and the plate is also warmed, there may be a thermodynamic gradient between the peripheral and central holes.

2.Evaporation effect: Although usually cell culture.

A tray of double distilled water is placed in the chamber to maintain the humidity in the incubator, but it is still difficult to achieve the humidity in a multi-well plate, especially if the incubator is frequently switched on and off.

Due to the positional effect, the humidity of the edge hole is lower than that of the middle hole, and the phenomenon of water volatilization is more serious. This makes it easy to create a four-week medium.

The volume will be significantly less than the middle hole, and the holes at the four corners are particularly severe.

Political economy has existed as an independent discipline for more than 200 years, but people's understanding of it has always been divided. The reason for this is that the academic community has not clearly understood the basic concept of "value". The value of philosophy and the value of economics are two very different concepts.

The value of economics is measured in money, and money is the measure of value. The value of philosophy is subjective evaluation and has nothing to do with money.

In the process of studying political economy, the "labor theory of value", "utility theory of value" and "marginal utility theory" confuse the value of economics with the value of philosophy, which is far-fetched and self-deceptive, and leads the study of political economy astray. Therefore, we must clarify the relationship between labor, utility, margin, and value, and get to the root of the problem.

In fact, labor determines the value of the product's output (output), not the value of the product (**). That is, the more labor invested, the more output value of the product; The more labor put in, the higher the value of the product. The value of the product is determined by the cost, and the cost is composed of the value of the five factors of production (labor, technology, resources, capital, and system), and the value of these five factors of production together determines the value of the product, and the value of labor is only one of them.

Wang's Political Economy redefines some basic concepts and makes major breakthroughs on many key issues. He founded the "Social Productivity Theory", which laid a solid theoretical foundation for the in-depth study of political economy. The "law of value identity" was discovered, that is, the value of production factors is equal to the value of products, which fundamentally solved the logical problem of formation and change.

Through qualitative analysis, quantitative analysis and causal analysis, the essence and law of political and economic activities are revealed.

The noun explanation of the edge effect is:

The marginal effect refers to the interaction between two or more ecosystems with different properties, due to the differences and synergies of certain ecological factors or system attributes, resulting in large changes in some components and behaviors of the system.

The marginal effect can be divided into positive effect and negative effect, and the positive effect shows that the effect area has better characteristics than the adjacent ecosystem, such as increased productivity and species diversity, and vice versa, it is called negative effect.

Characteristics of the edge effect:

The community structure of the marginal effect zone is complex, and some species are particularly active, and their productivity is relatively high. The edge effect begins with strong competition and ends with harmonious symbiosis, so that all kinds of organisms develop from fierce competition to each with its own ability, each has its own place, and interacts with each other to form a multi-level and efficient symbiotic network of matter and energy.

The edge effect has its stability, and can be generally divided into two types: dynamic edge and static edge according to the nature of the edge effect. The dynamic edge effect is a mobile ecosystem edge with a persistent input of matter and energy from the outside world.

This kind of edge effect is relatively stable and can maintain its high productivity for a long time. The static edge is a relatively static ecological edge, and there is no stable material and energy input from the outside world, and this kind of edge effect is temporary and unstable.