First, the breeding of dairy cows

In order to enable the cow to reproduce normally, it is necessary to understand the reproductive physiology of the cows and to conduct scientific feeding and management of the cows in the production practice so as to ensure the normal estrus and br…

1, appearance

The healthy chicks had neat, clean and shiny hair; the abdomen was flat and soft; there were no bleeding marks on the umbilicus and they were well-cure, tight and dry with villous coverage; the sick fluff was filthy, lacking in luster; the abdomen was enlarged and sla…

At present, garlic is in the seedling stage and is about to enter the period of vegetative growth and reproductive growth. In order to improve the quality and yield of garlic and garlic, field management should be strengthened, timely irrigation and irrigation, moisture and nutrition shoul…

1. Check the position of the oil level frequently. If it does not meet the requirements, it must be adjusted to meet the requirements. When operating with a vacuum pump, the oil level is at the center of the oil standard.

2. Under normal circumstances, the…

First, we must pay attention to fertilizer and water management. Due to the high temperature in summer, strong sunlight, large evaporation on the ground, and large transpiration of crops, watering is often required in the initial stage of planting to keep the soil moist. In the rainy seaso…

1. According to the measurement object and the measurement environment to determine the type of sensor to carry out - a specific measurement work, first of all to consider the principle of the sensor, which needs to analyze a variety of factors before it can be determined. Because even if it is…

Principle and application of R&D cancer cell sorting kit

Like stem cells, cancer cells can proliferate indefinitely. There is increasing evidence that clonal populations of tumor cells exhibit significant heterogeneity in terms of prolife…