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Teppei Nakamura,Tatsuhiko Hirota,Katsura Mizushima,Kohji Ohki,Yuji Naito,Naoyuki Yamamoto,Toshikazu Yoshikawa 한국식품영양과학회 2013 Journal of medicinal food Vol.16 No.5
Milk-derived peptides, Val-Pro-Pro (VPP) and Ile-Pro-Pro (IPP), have angiotensin I–converting enzyme inhibitory activities and blood pressure-lowering effects. We examined the effects of these peptides on the development of atherosclerosis in apolipoprotein E–deficient [apoE(−/−)] mice. For 31 weeks, six-week-old male apoE(−/−) mice received a diet that included one of the following: fermented milk containing both VPP and IPP; casein hydrolysate containing both of these peptides; synthesized VPP; synthesized IPP; enalapril; captopril; or control diet. At the end of feeding, blood biochemistry, aortic atherogenesis, and gene expression by DNA microarray analysis were evaluated. There were no significant changes in the plasma lipid levels and 8-isoprostane, a marker of oxidative stress. The area ratio of intima to media in the aortic arch was significantly lower in the fermented milk, casein hydrolysate, synthesized VPP, enalapril, and captopril groups than in the control group. As is common with diets containing VPP and/or IPP, we observed reductions in mRNA expression of inflammatory cytokines, such as interleukin (IL)-6 and IL-1β, oxidized low-density lipoprotein receptor, and transcription regulators. These results suggest that a continuous intake of VPP and IPP might be beneficial for preventing atherosclerosis caused by hypercholesterolemia.
Alexander De Los Reyes,Elizabeth Ann Prieto,Karim Omambac,Jeremy Porquez,Lorenzo Lopez Jr.,Karl Cedric Gonzales,John Daniel Vasquez,Mae Agatha Tumanguil,Joselito Muldera,Kohji Yamamoto,Masahiko Tani,A 한국물리학회 2017 Current Applied Physics Vol.17 No.4
We investigate the effects of an externally applied magnetic field on the terahertz (THz) emission of Gallium Manganese Arsenide (GaMnAs) films grown via molecular beam epitaxy (MBE). Results show that low Mn-doping in GaMnAs resulted to increased THz emission as compared with a SI-GaAs substrate. Further increase in Mn-doping content resulted to a comparably less THz emission, which is attributed to reduced crystallinity and higher free-carrier absorption. Under an external magnetic field, the contributions of the Bup and Bdown-related THz emission were observed to be asymmetric: possibly due to intrinsic magnetic properties of GaMnAs.