说明书：

ENH3.pdf

Application

• For quantitative determination of ammonia/ammonium concentration.

Key Features

• High sensitivity and wide linear range. Use 20 μL sample. Linear detection range 24 to 1000 μM ammonia.
• Homogeneous and simple procedure. Simple "mix-and-measure" procedure allows reliable quantitation of ammonia within 30 minutes.

Method

•  OD340nm, or FL360/450nm

Samples

•  Serum, plasma, urine, saliva, cell culture etc

Species

•  All

Size

•  100 tests

Detection Limit

•  24 μM

Shelf Life

•  6 months

More Details

•  Ammonia (NH3) or its ion form ammonium (NH4+) is an important source of nitrogen for living systems. It is synthesized through amino acid metabolism and is toxic when present at high concentrations. In the liver, ammonia is converted to urea through the urea cycle. Elevated levels of ammonia in the blood (hyperammonemia) have been found in liver dysfunction (cirrhosis), while hypoammonemia has been associated with defects in the urea cycle enzymes (e.g. ornithine transcarbamylase). Simple, direct and automation-ready procedures for measuring NH3 are popular in research and drug discovery. BioAssay Systems ammonia assay is designed to directly measure NH3 and NH4+. In this assay, NADH is converted to NAD+ in the presence of NH3, ketoglutarate and glutamate dehydrogenase. The decrease in optical density at 340 nm or fluorescence intensity at λex/em = 360/450 nm is directly proportionate to the NH3 concentration in the sample.

·相关文献

Ono, M., & Yoshiga, T. (2019). Cellular immunity in the insect Galleria mellonella against insect non-parasitic nematodes. Parasitology, 146(6), 708-715. Assay: Ammonia/Ammonium in Galleria mellonella greater wax moth.

Jiang, S., Yan, W., Wang, S. E., & Baltimore, D. (2018). Let-7 suppresses B cell activation through restricting the availability of necessary nutrients. Cell metabolism, 27(2), 393-403. Assay: Ammonia/Ammonium in mouse B cells.

Sartori, R., Leme, J., Caricati, C. P., Tonso, A., & Nunez, E. G. F. (2018). Model Comparison To Describe BHK-21 Cell Growth And Metabolism In Stirred Tank Bioreactors Operated In Batch Mode. Brazilian Journal Of Chemical Engineering, 35(2), 441-458. Assay: Ammonia/Ammonium in monkey bhk! Cell supernatant.

Zhu, J., Zhu, X. G., Ying, S. H., & Feng, M. G. (2017). Effect of vacuolar ATPase subunit H (VmaH) on cellular pH, asexual cycle, stress tolerance and virulence in Beauveria bassiana. Fungal genetics and biology, 98, 52-60. Assay: Ammonia/Ammonium in B. bassiana fungus.

Wang, L et al (2015). CtBP maintains cancer cell growth and metabolic homeostasis via regulating SIRT4. Cell Death and Disease 6: e1620. Assay: Ammonia/Ammonium in mice tumor tissue.

Nunez EG et al (2014). Influence of aeration-homogenization system in stirred tank bioreactors, dissolved oxygen concentration and pH control mode on BHK-21 cell growth and metabolism. Cytotechnology 66(4): 605-617. Assay: Ammonia in hamster cells.

Yu Z et al (2014). Advances in detection methods of L-amino acid oxidase activity. Appl Biochem Biotechnol. 174(1):13-27. Assay: Ammonia.

Rauner, G et al (2013). Development of Foreign Mammary Epithelial Morphology in the Stroma of Immunodeficient Mice. PloS one 8.6: e68637. Assay: Ammonia in mouse cell culture medium.