Скачать или смотреть Measurements of Non protein Nitrogen containing compounds

Non-protein nitrogen (NPN) containing compounds are substances that contain nitrogen but are not proteins. Measurements of NPN compounds are important in various fields, including medicine, nutrition, and environmental science. Here are some common measurements of NPN compounds:

1. Urea: Measured in blood and urine to assess kidney function and nitrogen balance.
2. Ammonia: Measured in blood and urine to diagnose liver dysfunction and urea cycle disorders.
3. Creatinine: Measured in blood and urine to assess kidney function and muscle mass.
4. Uric acid: Measured in blood and urine to diagnose gout and kidney stone disorders.
5. Nitrate and nitrite: Measured in water and soil to assess environmental pollution.
6. Trimethylamine (TMA): Measured in urine to diagnose trimethylaminuria, a genetic disorder.
7. Dimethylglycine (DMG): Measured in urine to diagnose metabolic disorders.
8. Methylmalonic acid (MMA): Measured in blood and urine to diagnose vitamin B12 deficiency.
9. Homocysteine: Measured in blood to diagnose cardiovascular disease and B vitamin deficiencies.
10. Guanidino compounds (e.g., guanidinoacetic acid, creatine): Measured in urine to diagnose kidney dysfunction and muscle disorders.

These measurements are typically performed using various analytical techniques, such as:

1. Colorimetry
2. Enzyme-linked immunosorbent assay (ELISA)
3. Gas chromatography-mass spectrometry (GC-MS)
4. Liquid chromatography-mass spectrometry (LC-MS)
5. High-performance liquid chromatography (HPLC)
6. Enzymatic assays

Note that the specific measurement methods and techniques may vary depending on the compound and the purpose of the measurement.

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