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Kim, Nam-Kuk,Lim, Dajeong,Lee, Seung-Hwan,Cho, Yong-Min,Park, Eung-Woo,Lee, Chang-Soo,Shin, Bong-Shig,Kim, Tae-Hun,Yoon, Duhak American Chemical Society 2011 Journal of agricultural and food chemistry Vol.59 No.10
<P>In previous proteomic studies, heat shock protein β 1 (HSPB1) was detected as a candidate protein related to meat quality in cattle. This study sought to determine if its gene expression was associated with intramuscular fat content in the longissimus thoracis muscle of Korean cattle (Hanwoo). Tissue from two groups of 10 steers each, low-marbling (mean intramuscular fat content, 7.4 ± 1.5%) and high-marbling (23.5 ± 2.8%), were used for immunoblotting, real-time PCR, and statistical analyses. HSPB1 expression in both mRNA and protein was shown to be negatively related to intramuscular fat content (<I>P</I> < 0.05). Pathway analysis found two genes, TNF receptor superfamily member 6 (FAS) and angiotensinogen (AGT), that were regulators of the HSPB1 gene. The expression of the two genes showed a negative correlation with intramuscular fat content (<I>P</I> < 0.05). These results suggest that HSPB1, FAS, and AGT may be good candidate genes associated with intramuscular fat content in the longissimus muscle of Korean cattle.</P>
UPLC-MS/MS를 이용한 경남지역 파프리카 중 neonicotinoid계 농약 잔류 모니터링
김남국(Nam-Kuk Kim),이승화(Seung Hwa Lee),남유정(Yu Jeong Nam),문경미(Kyung Mi Moon),박민호(Min Ho Park),윤문희(Mun Hee Yun),김미영(Mi Young Kim),장현민(Hyun Min Jang),신봉식(Bong Shig Shin) 한국농약과학회 2011 농약과학회지 Vol.15 No.1
Monitoring or follow-up surveying pesticide residues in agricultural commodities is the key to meet the international regulations and to enhance international competitiveness of Korean agricultural commodities. Six neonicotinoid insecticides, acetamiprid, clothianidin, dinotefuran, imidacloprid, thiacloprid, and thiamethoxam were monitored in 95 paprika samples collected from Gyeongnam area. The pesticide residues were extracted by EN15662 buffer based on the QuEChERS method, clean-upped with dispersive solid-phase extraction method to remove interfering pigments, and analyzed using UPLC-MS/MS. The neonicotinoid pesticides were detected in 90.5% of the paprika samples. Two or more pesticides were detected in 82.3% of samples. Although detection frequencies were high, all samples complied with the maximum residue limits (MRLs) set by both the Korea Food and Drug Administration (KFDA) and Japanese Ministry of Health, Labour and Welfare.