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Melamine contamination.
Tyan YC, Yang MH, Jong SB, Wang CK, Shiea J. Tyan YC, et al. Anal Bioanal Chem. 2009 Oct;395(3):729-35. doi: 10.1007/s00216-009-3009-0. Epub 2009 Aug 11. Anal Bioanal Chem. 2009. PMID: 19669733 Review.
In the summer of 2008, serious illnesses and deaths of babies in China were linked to melamine-tainted powdered infant formula. Melamine contains several metabolites, such as ammeline, ammelide, and cyanuric acid, and has been used for the adulteration of foods or milk to …
In the summer of 2008, serious illnesses and deaths of babies in China were linked to melamine-tainted powdered infant formula. Melamine con …
Bacterial ammeline metabolism via guanine deaminase.
Seffernick JL, Dodge AG, Sadowsky MJ, Bumpus JA, Wackett LP. Seffernick JL, et al. J Bacteriol. 2010 Feb;192(4):1106-12. doi: 10.1128/JB.01243-09. Epub 2009 Dec 18. J Bacteriol. 2010. PMID: 20023034 Free PMC article.
Bioinformatics analysis of these and other genomes led to the hypothesis that the ammeline deaminating enzyme was guanine deaminase. An E. coli guanine deaminase deletion mutant was deficient in ammeline deaminase activity, supporting the role of guanine deaminase i …
Bioinformatics analysis of these and other genomes led to the hypothesis that the ammeline deaminating enzyme was guanine deaminase. …
[Determination of melamine and ammeline in eggs and meat using hydrophilic interaction liquid chromatography].
Li Y, Hao W, Wang Y, Chen Q, Li J, Sun X. Li Y, et al. Se Pu. 2012 Jul;30(7):716-20. doi: 10.3724/sp.j.1123.2012.02011. Se Pu. 2012. PMID: 23189668 Chinese.
The limits of detection were 2 mg/kg for both melamine and ammeline. The average recoveries were between 80% and 105% in the spiked range of 2-10 mg/kg. The relative standard deviations were not more than 10%. The solutions of melamine and ammeline were stable in a …
The limits of detection were 2 mg/kg for both melamine and ammeline. The average recoveries were between 80% and 105% in the spiked r …
The degradative pathway of the s-triazine melamine. The steps to ring cleavage.
Jutzi K, Cook AM, Hütter R. Jutzi K, et al. Biochem J. 1982 Dec 15;208(3):679-84. doi: 10.1042/bj2080679. Biochem J. 1982. PMID: 6762212 Free PMC article.
Utilization of ammeline, ammelide, cyanuric acid or NH+4 was concomitant with growth. ...Melamine was converted stoichiometrically into equimolar amounts of ammeline and NH+4. 5. Ammeline was converted stoichiometrically into equimolar amounts of ammelide and …
Utilization of ammeline, ammelide, cyanuric acid or NH+4 was concomitant with growth. ...Melamine was converted stoichiometrically in …
Simultaneous determination of melamine, ammelide, ammeline, and cyanuric acid in milk and milk products by gas chromatography-tandem mass spectrometry.
Miao H, Fan S, Wu YN, Zhang L, Zhou PP, Li JG, Chen HJ, Zhao YF. Miao H, et al. Biomed Environ Sci. 2009 Apr;22(2):87-94. doi: 10.1016/S0895-3988(09)60027-1. Biomed Environ Sci. 2009. PMID: 19618683
RESULTS: The linear detectable ranges were from 0.004 mg/kg to 1.6 mg/kg for melamine, ammelide, ammeline, and cyanuric acid with a correlation coefficient no less than 0.999. ...CONCLUSION: This GC-MS/MS method for simultaneous determination of melamine, ammelide, amme …
RESULTS: The linear detectable ranges were from 0.004 mg/kg to 1.6 mg/kg for melamine, ammelide, ammeline, and cyanuric acid with a c …
Determination of melamine, ammeline, ammelide and cyanuric acid in infant formula purchased in Canada by liquid chromatography-tandem mass spectrometry.
Braekevelt E, Lau BP, Feng S, Ménard C, Tittlemier SA. Braekevelt E, et al. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2011 Jun;28(6):698-704. doi: 10.1080/19440049.2010.545442. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2011. PMID: 21623492 Free PMC article.
A liquid chromatography-tandem mass spectrometry-based isotope dilution method was developed for the analysis of the triazine compounds melamine (MEL), ammeline (AMN), ammelide (AMD) and cyanuric acid (CYA) in infant formula samples purchased in Canada in 2008 for the purp …
A liquid chromatography-tandem mass spectrometry-based isotope dilution method was developed for the analysis of the triazine compounds mela …
Determination of melamine and related triazine by-products ammeline, ammelide, and cyanuric acid by micellar electrokinetic chromatography.
Hsu YF, Chen KT, Liu YW, Hsieh SH, Huang HY. Hsu YF, et al. Anal Chim Acta. 2010 Jul 19;673(2):206-11. doi: 10.1016/j.aca.2010.05.032. Epub 2010 May 31. Anal Chim Acta. 2010. PMID: 20599037
In this study, micellar electrokinetic chromatographic (MEKC) methods were developed for the detection of traces of melamine and its related by-products (ammeline, ammelide, and cyanuric acid). Two on-line sample concentration steps namely reversed electrode polarity stack …
In this study, micellar electrokinetic chromatographic (MEKC) methods were developed for the detection of traces of melamine and its related …
Metabolism of Melamine by Klebsiella terragena.
Shelton DR, Karns JS, McCarty GW, Durham DR. Shelton DR, et al. Appl Environ Microbiol. 1997 Jul;63(7):2832-5. doi: 10.1128/aem.63.7.2832-2835.1997. Appl Environ Microbiol. 1997. PMID: 16535652 Free PMC article.
In the absence of added NH(inf4)(sup+), 1 mM melamine was metabolized concomitantly with growth. Ammeline, ammelide, cyanuric acid, and NH(inf4)(sup+) accumulated transiently in the culture medium to maximal concentrations of 0.012 mM, 0.39 mM, trace levels, and 0.61 mM, r …
In the absence of added NH(inf4)(sup+), 1 mM melamine was metabolized concomitantly with growth. Ammeline, ammelide, cyanuric acid, a …
Riboswitch-Based Reversible Dual Color Sensor.
Harbaugh SV, Goodson MS, Dillon K, Zabarnick S, Kelley-Loughnane N. Harbaugh SV, et al. ACS Synth Biol. 2017 May 19;6(5):766-781. doi: 10.1021/acssynbio.6b00199. Epub 2017 Feb 9. ACS Synth Biol. 2017. PMID: 28121427
We show that the dual-color reporter system can be successfully used to monitor activation of M6 and M6" riboswitches responsive to ammeline and pyrimido[4,5-d]pyrimidine-2,4-diamine, respectively, and a 2,4,6-trinitrotoluene-responsive riboswitch developed in this study. …
We show that the dual-color reporter system can be successfully used to monitor activation of M6 and M6" riboswitches responsive to ammel …
Identification and characterization of toxicity of contaminants in pet food leading to an outbreak of renal toxicity in cats and dogs.
Dobson RL, Motlagh S, Quijano M, Cambron RT, Baker TR, Pullen AM, Regg BT, Bigalow-Kern AS, Vennard T, Fix A, Reimschuessel R, Overmann G, Shan Y, Daston GP. Dobson RL, et al. Toxicol Sci. 2008 Nov;106(1):251-62. doi: 10.1093/toxsci/kfn160. Epub 2008 Aug 9. Toxicol Sci. 2008. PMID: 18689873
We hypothesized that these crystals were composed of the poorly soluble triazines, a melamine-cyanuric acid complex, or a combination. Sprague dawley rats were given up to 100 mg/kg ammeline or ammelide alone, a mixture of melamine and cyanuric acid (400/400 mg/kg/day), or …
We hypothesized that these crystals were composed of the poorly soluble triazines, a melamine-cyanuric acid complex, or a combination. Sprag …
95 results