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Introduction of virtual open chamber for testing a weather modification technique in Korea
J-W Cha,K-H Chang,M-J Lee,J-Y Jeong,J-W Jung,H-Y Yang,K-L Kim,Y-C Kim,C-H Kim,K-H Nam,M-K Suk,C-K Jung,H-Y Go,J-H Chae,G-W Lee,Y-H Cho,S-H Jung,H-M Park,Y-A Oh,J-Y Jung,B-G Kim,Y-J Kim,M-H Choi,S-D Ki 한국기상학회 2009 한국기상학회 학술대회 논문집 Vol.2009 No.4
Lee, J.J.,Nam, S.,Park, J.H.,Lee, S.Y.,Jeong, J.Y.,Lee, J.Y.,Kang, W.S.,Yoon, I.S.,Kim, D.D.,Cho, H.J. Academic Press 2016 JOURNAL OF COLLOID AND INTERFACE SCIENCE - Vol.484 No.-
Nanocomposites (NCs) based on Soluplus (SP) were fabricated by an electrohydrodynamic (EHD) method for the oral delivery of Angelica gigas Nakai (AGN). Nano-sized particles were obtained after dispersing the resultant, produced by the EHD technique, in the aqueous environment. AGN/SP2 (AGN:SP=1:2, w/w) NC dispersion in aqueous media exhibited a 130nm mean diameter, narrow size distribution, and robust stability in the tested concentration range of the ethanol extract of AGN (AGN EtOH ext) and at pH 1.2 and 6.8. Amorphization of the components of AGN and their interactions with SP in the AGN/SP2 NC formulation were demonstrated by X-ray diffractometry (XRD) analysis. The released amounts of decursin (D) and decursinol angelate (DA), major components of AGN, from NCs were improved compared with those from the AGN EtOH ext group at both pH 1.2 and 6.8. As D and DA can be metabolized into decursinol (DOH) in the liver after oral administration, the DOH concentrations in plasma were quantitatively determined to evaluate the oral absorption of AGN. In a pharmacokinetic study in rats, higher oral absorption and the maximum concentration in plasma (C<SUB>max</SUB>) were presented in the AGN/SP2 NC group compared with the AGN EtOH ext and AGN NC groups. These findings indicate the successful application of developed SP-based NCs for the oral delivery of AGN.
Probiotic properties of Weissella strains isolated from human faeces
Lee, K.W.,Park, J.Y.,Jeong, H.R.,Heo, H.J.,Han, N.S.,Kim, J.H. Academic Press 2012 Anaerobe Vol.18 No.1
Three Weissella confusa and five Weissella cibaria strains were previously isolated from human faeces and their potential as probiotics was examined in this work. Resistance to low pHs (pH 2.0 and 3.0) and 0.3% bile salt were examined. Enzyme activities, susceptibilities to heat treatment and various antibiotics, and adhesion capacities to Caco-2 cells were also examined. All Weissella strains were killed when exposed to pH 2.0 for 2 h but survived at pH 3.0 with different survival ratios. W. confusa 31 survived best (20.2%) and W. confusa 31 was also quite resistant against 0.3% bile salt (128.8%). All strains except one grew well at temperature between 15 and 45 <SUP>o</SUP>C and all strains grew in the presence of 6.5% NaCl. W. confusa 20 showed the highest β-galactosidase activity (527.3 +/- 23.66 unit/mg protein) and W. cibaria 31 had the highest β-glucosidase activity (115.12 +/- 5.3 unit/mg protein) in MRS broth. All strains adhered to Caco-2 cells better than Lactobacillus rhamnosus GG and W. confusa 20 was the best adhesive strain (85 CFU/cell). These results show that some strains such as W. confusa 31 and W. confusa 20 are fully qualified as probiotics and deserve further application studies.