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. Urine Reagent Strips,Urine Test Strip,Urine Sugar Strip Test,Visual Urine Analysis Strips Jilin Sinoscience Technology Co. LTD , https://www.jlgkscience.com
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.
Scientists have created a genetically modified corn variety that can defend itself against destructive rootworm pests by releasing a specific chemical signal that attracts nematodes—natural predators of beetle larvae. When plants are under attack, they typically emit volatile chemicals that draw in beneficial insects to help combat the invaders. However, over time, due to selective breeding for faster growth and increased pesticide use, many crops have lost this natural defense mechanism. To restore it, Ted Turlings and his team introduced a synthetic gene from oregano, specifically (E)-β-caryophyllene (EβC), into a maize strain. This compound is known to attract nematodes, giving the plant a new way to fight back.
In experiments, the genetically modified maize was planted alongside regular corn that didn’t release the chemical. The researchers then introduced large numbers of beetle larvae into the fields. When nematodes were released into the experimental plots, the GM corn showed significantly less root damage and had 60% fewer adult beetles compared to non-modified plants. The findings suggest that enhancing a crop’s ability to produce these protective volatile compounds could be a powerful tool in pest management. By leveraging natural ecological interactions, scientists may develop more sustainable and environmentally friendly strategies to protect crops from pests without relying heavily on chemical pesticides. This approach not only supports biodiversity but also offers a promising alternative for future agricultural practices.