• Journal of Food Hygiene and Safety
• /
• v.21 no.4
• /
• pp.204-212
• /
• 2006

This study was conducted to investigate the possibility of rapid and non-des tructive evalution of AV (Acid Value), IV (Iodine Value) and fatty acids in sesame oils. The samples were scanned over the range $400\sim2500nm$ using transmittance spectrum of NIRS(Near-infrared spectroscopy). A calibration equation calculated by MPLS regression technique was developed and correlation coefficient of determination for AV, IV, palmitic acid, stearic acid, linoleic acid and linolenic acid content were 0.9907, 0.9677, 0.9527, 0.9210, 0.9829, 0.9736 and 0.9709 respectively. The validation model for measuring the AV content had R of 0.989, SEP of 0.058 and IV content had R of 0.944, SEP of 0.562 and palmitic acid content had R of 0.924, SEP of 0.194 and stearic acid content had R of 0.717, SEP of 0.168 and oleic acid content had R of 0.989, SEP of 0.221 and linoleic acid content had R of 0.967, SEP of 0.297 and linolenic acid content had R of 0.853, SEP of 0.480 by MPLS. The obtained results indicate that the NIRS procedure can potentially be used as a non-destructive analysis method for the purpose of rapid and simple measurement of AV, IV and fatty acids in sesame oils.

• Korean Journal of Food Science and Technology
• /
• v.53 no.4
• /
• pp.495-500
• /
• 2021

This study investigated the prevalence, serotypes, virulence genes, and antimicrobial resistance patterns of Listeria monocytogenes isolates collected from salmon products. A total of 16 out of 65 salmon products (24.6%) were positive for L. monocytogenes. Bacteria were most frequently identified in smoked salmon products (15/53, 28.3%). Serological tests revealed that serotype 1/2b (62.5%) was the predominant serotype of L. monocytogenes, followed by 1/2a (37.5%). All isolates harbored 10 virulence-associated genes (inlA, inlB, plcA, plcB, hlyA, actA, prf, fbpA, iap, and mpl), confirming their potential pathogenicity. The isolates of L. monocytogenes showed resistance to cefotetan (100%), cefotaxime (87.5%), cefepime (31.3%), erythromycin (6.3%), and tetracycline (6.3%); however, most of the strains were susceptible to antimicrobials except cephalosporins. These results provide useful information regarding the contamination of salmon products with L. monocytogenes, which may have implications for public health.