How to top and topping periwinkle
1. Catharanthus topping
Generally, the correct operation steps are to look from the top down, starting from the first axillary bud, and then use sterilized scissors to cut its leaves directly. If you use hand pinching, try to make its incision relatively flat, otherwise it will grow later. However, after topping, the periwinkle needs to be moved to a cool place to dry its cut. After recovery, it can be maintained and grown normally.
2. Topping frequency Catharanthus roseus topping is generally reserved for 3 to 4 branches of the branches, and then cut off the upper branches. After the new branches grow out, perform the topping again, and then repeat it again, that is, It is said that Catharanthus roseus generally has to be topped at least three times since its growth, and the number of times should not be too much.
3. Later management After the topping of Catharanthus roseus, in addition to moving to a cool place to dry the incision, during this period, it should not be exposed to rain or high temperature exposure. After the incision has recovered naturally, we can provide it with sufficient Light, proper temperature, and normal watering and fertilization are all you need. The main purpose of topping periwinkle is to cut off the top of the main stem and leaves. Normally, after topping and topping of the periwinkle, the main stem can be effectively controlled to continue to grow, so as to grow more branches. Its side buds can produce more beautiful flowers, and the flowering time may be delayed after topping the periwinkle.
4. Topping and topping. Topping and topping need to be determined according to the plant size. When the periwinkle grows between 7 cm and 10 cm and has 4 to 5 true leaves in diameter, we can topp the periwinkle, along with the whole plant of the periwinkle. It grows and expands. In the later stage, it needs to be topped and topped. The second topping time is about 20 days after the first topping. When the periwinkle's side branches grow 4~5 leaves, topping and topping of the periwinkle .
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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
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