An expert system for the selection of criteria for selectivity optimization in high-pressure liquid chromatography

1988 ◽  
Vol 26 (1) ◽  
pp. 101-109 ◽  
Author(s):  
Anne Peeters ◽  
Lutgarde Buydens ◽  
Desire L. Massart ◽  
P. J. Schoenmakers
Keyword(s):  
High Pressure ◽  
Liquid Chromatography ◽  
Expert System ◽  
High Pressure Liquid Chromatography ◽  
Selectivity Optimization ◽  
Selection Of

Histamine and Cadaverine Production by Bacteria Isolated from Fresh and Frozen Albacore (Thunnus alalunga)

1999 ◽  
Vol 62 (8) ◽  
pp. 933-939 ◽  
Author(s):  
BEGOÑA BEN-GIGIREY ◽  
JUAN M. VIEITES BAPTISTA de SOUSA ◽  
TOMAS G. VILLA ◽  
JORGE BARROS-VELAZQUEZ
Keyword(s):  
High Pressure ◽  
Liquid Chromatography ◽  
High Pressure Liquid Chromatography ◽  
Stenotrophomonas Maltophilia ◽  
Bacterial Strains ◽  
Preliminary Screening ◽  
Albacore Tuna ◽  
Histamine Production ◽  
Thunnus Alalunga ◽  
Selection Of

Two hundred twenty-seven bacterial strains were isolated from fresh and frozen albacore stored either at −18 or −25°C and investigated for their abilities to produce biogenic amines. As a preliminary screening, all 227 strains were tested in either Niven or Niven modified medium, which allowed the selection of 25 presumptive histamine-producing strains. High-pressure liquid chromatography revealed that only 10 of the 25 strains selected were able to produce low histamine concentrations (<25 ppm) in tryptic soy broth medium supplemented with 2% histidine. None of the 25 strains tested produced putrescine or spermine, whereas 6 strains produced spermidine. Histamine production by Stenotrophomonas maltophilia strain 25MC6 was not prevented at 4°C, and the levels of this amine reached concentrations of 25.8 ppm after 6 days. Three S. maltophilia strains showed strong lysine-decarboxylating activity. Their cadaverine formation capacity was determined by high-pressure liquid chromatography in tryptic soy broth supplemented with 1% lysine; this revealed that the three S. maltophilia strains tested produced more than 700 ppm of cadaverine during the first 24 h of incubation at 37°C. S. maltophilia strain 15MF, initially obtained from fresh albacore tuna, produced up to 2,399 ppm and 4,820 ppm of cadaverine after 24 and 48 h of incubation at 37°C, respectively. To our knowledge, this is the first report on histamine and cadaverine production by strains of the species S. maltophilia, previously known as Pseudomonas and Xanthomonas maltophilia, isolated from fresh and frozen albacore tuna.

Historical chemical annotations of Cinchona bark collections are comparable to results from current day high-pressure liquid chromatography technologies

2020 ◽  
Vol 249 ◽  
pp. 112375 ◽  
Author(s):  
Nataly Allasi Canales ◽  
Tobias Nikolaj Gress Hansen ◽  
Claus Cornett ◽  
Kim Walker ◽  
Felix Driver ◽  
...  
Keyword(s):  
High Pressure ◽  
Liquid Chromatography ◽  
High Pressure Liquid Chromatography
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