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Changes in Sensory Compounds during Dry Aging of Pork Cuts
Young-Hwa Hwang,Nahar Sabikun,Ishamri Ismail,Seon-Tea Joo 한국축산식품학회 2019 한국축산식품학회지 Vol.39 No.3
The effects of dry-aging on changes in taste compounds and electronic taste sensing traits of pork were investigated. Ten pork belly and shoulder blade cuts were divided into wet-aging and dry-aging treatments and stored for 21 days at 2°C. The contents of nucleotides and free amino acids, and electronic tongue analysis were investigated at different aging periods (1, 7, 14, and 21 days). The contents of inosine and hypoxanthine of dry-aged pork cuts increased more rapidly, and they were significantly (p<0.05) higher than wet-aged pork cuts. Total free amino acids of dry-aged pork cuts were also significantly (p<0.05) higher than those of wet-aged pork cuts after 21 days of aging. Consequently, umami intensity of dry-aged pork cuts increased more rapidly and the values were significantly (p<0.05) higher than those of wet-aged pork during 21 days of aging. Results suggested that the better palatability of dry-aged pork cuts might be due to higher umami intensity in relation to higher contents of inosine, hypoxanthine, and free amino acids.
Comparison of Meat Quality Characteristics of Wetand Dry-aging Pork Belly and Shoulder Blade
Young-Hwa Hwang,Nahar Sabikun,Ishamri Ismail,Seon-Tea Joo 한국축산식품학회 2018 한국축산식품학회지 Vol.38 No.5
The physicochemical characteristics and oxidative stability of wet-aged and dryaged pork cuts were investigated at different aging periods (1, 7, 14 and 21 d). Samples were assigned into four groups in terms of shoulder blade-wet aging (SW), shoulder bladedry aging (SD), belly-wet aging (BW), and belly-dry aging (BD). SD showed significantly higher pH at 21 d of aging than the other samples. Wet-aged cuts had significantly higher released water (RW) %, lightness (L<sup>*</sup>) and shear force compared to the dry-aged meats. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis showed greater degradation of proteins for dry-aged cuts than the wet-aged cuts. At the end of aging, wet-aged cuts showed significantly lower thiobarbituric acid-reactive substances (TBARS) value than the dry-aged samples, indicating higher oxidative stability for wet-aged pork cuts. However, dry-aging led to higher degradation of proteins resulting in increased waterholding capacity (WHC) and decreased shear force value.
Kim, Kihyun,Kong, Sun-Young,Fulciniti, Mariateresa,Li, Xianfeng,Song, Weihua,Nahar, Sabikun,Burger, Peter,Rumizen, Mathew J.,Podar, Klaus,Chauhan, Dharminder,Hideshima, Teru,Munshi, Nikhil C.,Richards Blackwell Publishing Ltd 2010 British journal of haematology Vol.149 No.4
<P>Summary</P><P>This study investigated the cytotoxicity and mechanism of action of AS703026, a novel, selective, orally bioavailable MEK1/2 inhibitor, in human multiple myeloma (MM). AS703026 inhibited growth and survival of MM cells and cytokine-induced osteoclast differentiation more potently (9- to 10-fold) than AZD6244. Inhibition of proliferation induced by AS703026 was mediated by G<SUB>0</SUB>-G<SUB>1</SUB> cell cycle arrest and was accompanied by reduction of <I>MAF</I> oncogene expression. AS703026 further induced apoptosis via caspase 3 and Poly ADP ribose polymerase (PARP) cleavage in MM cells, both in the presence or absence of bone marrow stromal cells (BMSCs). Importantly, AS703026 sensitized MM cells to a broad spectrum of conventional (dexamethasone, melphalan), novel or emerging (lenalidomide, perifosine, bortezomib, rapamycin) anti-MM therapies. Significant tumour growth reduction in AS703026- vs. vehicle-treated mice bearing H929 MM xenograft tumours correlated with downregulated pERK1/2, induced PARP cleavage, and decreased microvessels <I>in vivo</I>. Moreover, AS703026 (<200 nmol/l) was cytotoxic against the majority of tumour cells tested from patients with relapsed and refractory MM (84%), regardless of mutational status of <I>RAS</I> and <I>BRAF</I> genes. Importantly, BMSC-induced viability of MM patient cells was similarly blocked within the same dose range. Our results therefore support clinical evaluation of AS703026, alone or in combination with other anti-MM agents, to improve patient outcome.</P>