A: There are five types of apple orchards that need to be reshaped. First, the orchards with higher density. More than 60 trees were planted in the acacia roots, and more than 80 trees were planted in dwarf anvils and short-branched orchards. There were serious branches, poor light conditions in the orchard, and difficult field operations. Second, the orchards with excessive branches. There are more than 10 main branches of the tree, and the main branch of the center is close to the center of the stem. The forces between the branches are unbalanced and the light is poor. Third, the branches are oversized. As a result, the volume of the branch group is too large, the length exceeds the tree shape requirement, and the distribution is too dense, which seriously affects the growth of the main branch and the tree structure. Fourth, the tree with the branches erecting the canopy. Long branches, short branches, difficulty in flower bud formation; fifth, trees with too high crowns. The height of the canopy exceeds the height required by the standard tree shape, and the upper part of the canopy is excessively branched, the growth is strong, and the upper layer is severely shielded.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Urinalysis test strips refer to test strips that test for bilirubin, urobilinogen, ketone bodies, ascorbic acid, glucose, protein (albumin), blood cells, PH, etc. in urine.
Detection principle
1. pH: The pH value in the range of 5-9 is measured by the pH indicator, and the pH value of the fresh urine of a normal person is between 5-7.
2. Nitrite: The reaction is based on the reduction of nitrate to nitrite by Gram-positive bacteria in the urine. The nitrite reacts with p-aminobenzenesulfonic acid to form diazonium compounds, which are then combined with N-(1-naphthalene) )-3 aminopropanesulfonate combined with a pink color.
3. Glucose: According to the reaction principle of glucose oxidase, glucose oxidase specifically oxidizes glucose to generate glucuronic acid and hydrogen peroxide. Under the action of hydrogen peroxide, hydrogen peroxide oxidizes the indicator and turns color. .
Classification
Urinalysis test strips are divided into visual series and machine series. The visual inspection series is divided into several models according to different inspection items; the machine inspection series is divided into several models according to different applicable instruments.
1. Classification by measurement method
1) Visual inspection series
When observing the result, compare the color with the standard color code within the time specified on the color code, judge and read the result.
2) Machine test series.
For instrument operation, refer to the instruction manual of the Urine Analyzer used.
2. According to the number of measurement items
There are single-item, 2-item, 4-item and multiple test strips. Currently, 10-item or 11-item multiple test strips are most commonly used in hospitals.
3. Classification by structure
Urinalysis test strips with single-layer membrane structure and multi-layer membrane structure.
Urine Reagent Strips,Urine Test Strip,Urine Sugar Strip Test,Visual Urine Analysis Strips
Jilin Sinoscience Technology Co. LTD , https://www.jilinsinoscience.com