geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Influence of dl methionine on the photostability of ascorbic acid solutions


, : Influence of dl methionine on the photostability of ascorbic acid solutions. Drug Development & Industrial Pharmacy 11(12): 2109-2126

The photostabilizing effect of DL-methionine for various buffered solutions of ascorbic acid was investigated. DL-methionine in a concentration of 10 mg% was found to enhance the photostability of 40 mg% ascorbic acid in acetate and phosphate buffers, but not in citrate buffer of pH 4.5. The photoprotective action of DL-methionine appeared to be influenced by its concentration, the pH of the medium and its buffer species. DL-methionine was also found to demonstrate its photoprotective action in presence of glycerin, EDTA and Tween 80. PEG 300, however, appeared to have a detrimental effect on the photostabilizing action of DL-methionine for ascorbic acid in acetate buffer of pH 4.5.

US$29.90


Other references

Voigt, S.; Giulio-Tonolo, F.; Lyons, J.; Kučera, J.; Jones, B.; Schneiderhan, T.; Platzeck, G.; Kaku, K.; Hazarika, M.Kumar.; Czaran, L.; Li, S.; Pedersen, W.; James, G.Kadiri.; Proy, C.; Muthike, D.Macharia.; Bequignon, J.; Guha-Sapir, D., 2016: Global trends in satellite-based emergency mapping. Over the past 15 years, scientists and disaster responders have increasingly used satellite-based Earth observations for global rapid assessment of disaster situations. We review global trends in satellite rapid response and emergency mapping from...

Narang, H.K.; Codd, A.A., 1980: Preponderance of rotavirus in clumped form in patients with acute gastroenteritis. Lancet 1(8179): 1192-1193

Daneilian, S.N.; Abakumov, M.M.; Chernen'kaia, T.V., 2011: Septic complications of the closed thoracic trauma. 210 cases of septic complications after blunt thoracic injuries were analyzed. Pleura empyem was observed in 172 (1,34%) of 12874 patients (overall number of the injuried), lung abscess - in 48 (0,37%) cases, pericarditis was diagnosed in 33 (0,23...

Sinay P., 1972: Recent progress in knowledge about the peptido glycan of bacterial walls. Bulletin de la Societe Chimique de France 18B: 11-12

Ettinger, W.F.; Clear, A.M.; Fanning, K.J.; Peck, M.L.u, 1998: Identification of a Ca2+/H+ antiporter in the plant chloroplast thylakoid membrane. Plant Biology (Rockville) : 135

Fuller, J.F., 1974: Cost-benefit and cost-effectiveness analysis. New Zealand Dental Journal 70(322): 282-288

Leclerc, M.; Delbes, C.; Moletta, R.; Godon, J.J.cques, 2001: Single strand conformation polymorphism monitoring of 16S rDNA Archaea during start-up of an anaerobic digester. A laboratory-scale continuously mixed anaerobic digester was inoculated with a mix of anaerobic sludge and fed with glucose. The start-up strategy was progressive and chemical analyses were done to evaluate digester performance from day 1 to day 1...

Zheng, B.; Yin, Z-Kui.; He, A.; Li, Z-Ya.; Zhan, X-Mei., 2014: Protein interaction between aldolase and actin of Toxoplasma gondii by GST pull-down. To identify the protein-protein interaction between aldolase and actin of Toxoplasma gondii by GST pull-down. The aldolase and actin genes were obtained from cDNA library by PCR amplification, and subcloned respectively into pGEX-4T-1 and pET30a....

Withers, J.; Ashton, D.H., 1977: Studies on the status of unburnt eucalyptus woodland at ocean grove victoria australia part 1 the structure and regeneration. In a relatively dry maritime environment at Ocean Grove, [Victoria, Australia], an unburnt remnant of vegetation was found to consist of a mosaic of scrub brush dominated by Casuarina littoralis and C. stricta, and grassy-to-layered woodland domin...

Jinnai, I., 2002: Antileukemic drug--a selective inhibitor of BCR-ABL tyrosine kynase, imatinib(STI571). Chronic myeloid leukemia (CML) is a clonal hematopoietic stem cell disorder characterized by Philadelphia chromosome and resultant production of the constitutively activated BCR-ABL tyrosine kinase. Imatinib (STI571), selective inhibitor of the AB...