• The Korean Journal of Food And Nutrition
• /
• v.33 no.3
• /
• pp.331-338
• /
• 2020

The purpose of this study was to examine the effect of noni (Morinda citrifolia) powder on the physicochemical properties and antioxidant activities of ground pork meat. Four samples of ground pork meat were prepared as follow: CON without noni powder, NP0.5 with 0.5% noni powder, NP1.0 with 1.0% noni powder, and NP1.5 with 1.5% noni powder. The moisture content of CON was the highest (p<0.05). The ash, fiber, fat retention, hardness, cohesiveness, gumminess, chewiness, lightness, and yellowness increased with the addition of the noni powder (p<0.05). The protein, fat, water holding capacity, cooking yield, moisture retention, springiness,and redness of the cooked meat were not significantly different among the samples. The pH of CON was the highest among the samples (p<0.05). The TBARS of CON, NP0.5, NP1.0, and NP1.5 were 0.48, 0.41, 0.36 and 0.34 mg/kg, respectively, and the NP1.5 was the lowest (p<0.05). The DPPH radical scavenging activity of CON, NP0.5, NP1.0, and NP1.5 were 10.4%, 20.8%, 34.6% and 45.3%, respectively, and the NP1.5 was the highest (p<0.05). Consequently, these results support the possible use of noni powder for meat product industry, as addition of noni powder enhances the antioxidant activities of ground pork meat.

• Journal of Biomedical Engineering Research
• /
• v.29 no.2
• /
• pp.159-163
• /
• 2008

The goal of this study is to investigate the effect and potential of three-dimensional Co-culture of BMSCs (bone marrow stromal Cells) and NP (nucleus pulposus) Cells on the differentiation of BMSCs into NP-like Cells. The NP Cells and BMSCs were isolated and cultured from New Zealand White rabbits. The isolated NP Cells and BMSCs were prepared in different alginate beads. Those two types of beads were separated by a track-etched membrane of $3\;{\mu}m$ pore in a 6-well culture plate. No growth factors were used. In addition to these, NP and BMSC were cultured in the beads independently for control. The number of Cells in Co-culturing system was half of those in two control groups. Proliferation and production of glycosaminoglycan (GAG) were evaluated along with histological observation. The GAG production rate(GAG contents/Cell) of Co-cultured BMSCs were much higher than that of BMSCs cultured alone. The total amounts of GAG produced by BMSCs in Co-culturing system were larger than those produced by BMSCs in control group and were comparable with those produced by NP alone even the number of each Cell was half of BMSCs in Co-culturing system. This study showed the potential of differentiation of BMSCs into NP-like Cells through three-dimensional Co-culture system even without any chemical agents.

• Journal of the Korean Applied Science and Technology
• /
• v.38 no.3
• /
• pp.801-812
• /
• 2021

In order to delivery biotin to skin, ethosomes containing both biotin and ceramide were researched by using high pressure homogenizer. Biotin was utilized as a drug and ceramide NP was utilized as a supporter of bilayer. The biotin was entrapped in aqueous core, while ceramide NP was packed in the bilayer of the ethosomes. Looking at the physical properties of vesicles containing ceramide NP, the sized was 80~130 nm, the polydispersity index was 0.09~0.16, and the zeta potential was -40~-49 mV. In vesicles without ceramide NP, the size was 124.80±1.46 nm, and the zeta potential and polydispersity index were -45.48±1.27 mV and 0.088±0.018, respectively. Therefore, the ethosome with ceramide NP has improved physical properties of vesicles compared to the ethosome without ceramide NP. Skin absorption rates of ethosomes with ceramide NP were 6.13~14.98%, while skin absorption rate of ethosome without ceramide NP was 7.08% at 12 h. In conclusion, ethosomes containing ceramide NP not only improved the skin absorption efficiency, but had also a positive effect on the stability of vesicles.

• Bulletin of the Korean Chemical Society
• /
• v.26 no.11
• /
• pp.1692-1694
• /
• 2005

Spent nuclear fuel is reprocessed commercially by the chemical process to recover U and Pu. Recently, new salt-free reagents to separate plutonium and neptunium from uranium suitable for use in a single cycle flowsheet have been developed. Acetohydroxamic acid $(CH_3CONHOH)$ has been taken much interest in as a complexing agent capable of selective stripping of tetravalent actinides from U(VI) when actinides are present in the solvent stream of the advanced PUREX process. Additionally acetohydroxamic acid will rapidly reduce Np(VI) to inextractable Np(V) thus allowing the separation of Np from U. In this study, the rate equation for the reduction of Np(VI) to Np(V) in nitric acid aqueous solution has been determined as: $-[NpO_2^{2+}]$/dt = $k[NpO_2^{2+}]$[AHA] with k = 191.2 ${\pm}$ 11.2 $M^{-1}s^{-1}$ at 25 ${\pm}$ 0.5 ${^{\circ}C}$ and $[HNO_3]$ = 1.0 M. Comparison with other reductants available in the literature, acetohydroxamic acid is a strong one for $NpO_2^{2+}$.

• Journal of the East Asian Society of Dietary Life
• /
• v.14 no.3
• /
• pp.302-308
• /
• 2004

This study was conducted to compare the acquiring and using patterns of information about food and nutrition between medical professional group (MP) and non-medical professionals group (NP). Questionnaire survey were done by total 310 subjects, 149 doctors/nurses (MP) working in Dankook University Hospital and 161 general laborers (NP) in Cheonan area. Personal characteristics, interests in food and nutrition information, and application of information about food and nutrition were asked in questionnaire. Age of MP and NP ranged from 20 to 50. In education level, 59.8% of MP and 46.6% of NP had college degree. The source of information favored the most was the internet website, 53.0% in MP and 51.6% in NP. The most interested information subjects in MP were ‘the diet therapy related to diseases’, and ‘cooking recipes’ in NP. The information was applied to their real life in 55.7% of MP and 58.4% of NP. The percentiles who would like to take part in the education about food and nutrition through internet system were 44.3% of MP and 34.8% of NP. From the results of this study, we concluded that many of MP and NP wanted and needed the education on food and nutrition through internet system. For being the better and more efficient source for the information about food and nutrition, internet websites should provide accurate informations and easier method to find the needed information to the users.

• The Journal of Internal Korean Medicine
• /
• v.28 no.3
• /
• pp.586-596
• /
• 2007

Objectives : This study aimed to investigate the underlying protective mechanism of Rhizoma Arisaematis(RA) on 3-NP-induced Cytotoxicity in rat C6 glial cells. Methods : We investigated treatment ofC6 cells with 20mM 3-NP and pretreatment with RA to cause loss of cell viability. and morphological change. which was associated with elevation of ROS level. increase in Bax/Bcl2 ratio and HIF-a protein expression Results : RA inhibited 3-NP-induced cell death in C6 glial cells and inhibited the changes of the : MMPT (mitochondria membrane potential transition) and inhibited the decrease of mitochondria complex II activity and 3-NP-induced ROS generation in C6 cells. And RA decreased the activity of HIF-a and Bax. and increased the activity of $Bcl_2$ in C6 glial cells Conclusions : RA markedly protects C6 glial cells from 3-NP-induced oxidative injury.

• Journal of Microbiology and Biotechnology
• /
• v.28 no.9
• /
• pp.1563-1572
• /
• 2018

Gold nanoparticles (AuNP) and their conjugates have been gaining a great deal of recognition in the medical field. Meanwhile, extended-spectrum ${\beta}$-lactamases (ESBL)-producing bacteria are also demonstrating a challenging problem for health care. The aim of this study was the biosynthesis of AuNP using Rosa damascenes petal extract and conjugation of ceftriaxone antibiotic (Cef-AuNP) in inhibiting ESBL-producing bacteria and study of in vitro anticancer activity. Characterization of the synthesized AuNP and Cef-AuNP was studied. ESBL-producing strains, Acinetobacter baumannii ACI1 and Pseudomonas aeruginosa PSE4 were used for testing the efficacy of Cef-AuNP. The cells of MCF-7 breast cancer were treated with previous AuNP and Cef-AuNP at different time intervals. Cytotoxicity effects of apoptosis and its molecular mechanism were evaluated. Ultraviolet-visible spectroscopy and Fourier transform infrared spectroscopy established the formation of AuNP and Cef-AuNP. Transmission electron microscope demonstrated that the formed nanoparticles were of different shapes with sizes of 15~35 nm and conjugation was established by a slight increase in size. Minimum inhibitory concentration (MIC) values of Cef-AuNP against tested strains were obtained as 3.6 and $4{\mu}g/ml$, respectively. Cef-AuNP demonstrated a decrease in the MIC of ceftriaxone down to more than 27 folds on the studied strains. The biosynthesized AuNP displayed apoptotic and time-dependent cytotoxic effects in the cells of MCF-7 at a concentration of $0.1{\mu}g/ml$ medium. The Cef-AuNP have low significant effects on MCF-7 cells. These results enhance the conjugating utility in old unresponsive ceftriaxone with AuNP to restore its efficiency against otherwise resistant bacterial pathogens. Additionally, AuNP may be used as an alternative chemotherapeutic treatment of MCF-7 cancer cells.

• Journal of fish pathology
• /
• v.21 no.1
• /
• pp.57-66
• /
• 2008

Striped bitterling, Acheilognathus yamatsutae (TL: 4.25 ㎝, TW: 0.73 g)were exposed to 0.3, 1.3, 17.6 and 33.7 ㎍ L-1 (nominal concentrations) of nonylphenol (NP) for a period of 20 weeks. We studied on accumulation, growth and survival rate. After 20 weeks of exposure, the accumulation of NP in the body of the female and male was increased with increasing dose-dependent and female was higher than male. 4 weeks of exposure, TL of female striped bitterling was found to be increased in all of the dose group compared to control and 12 weeks of exposure, similar or some decreased in all of the dose group compared to control. 20 weeks of exposure, increased in all of the dose group compared to control and TL at 33.7 ㎍ NP L-1 were significantly higher than those in control (p <0.05). 4 weeks of exposure, TL and TW of male striped bitterling was found to be increased in all of the dose group compared to control and significantly higher in TL of 33.7 ㎍ NP L-1 (p <0.05). 12 and 20 weeks of exposure, TL and TW decreased in all of the dose group compared to control and significantly lower in 1.3 ㎍ NP L-1 of 12 weeks. Survival rate in both groups decreased with increasing NP concentration and there was a significant difference between control group and experimental groups exposed to each NP concentration.

• Clean Technology
• /
• v.27 no.3
• /
• pp.223-231
• /
• 2021

In order to address many issues associated with large volume changes of silicon, which has very low electrical conductivity but offers about 10 times higher theoretical capacity than graphite (Gr), a silicon nanoparticles/hollow carbon (SiNP/HC) composite having bimodal-mesopores was prepared using silica nanoparticles as a template. A control SiNP/C composite without a hollow structure was also prepared for comparison. The physico-chemical and electrochemical properties of SiNP/HC were analyzed by X-ray diffractometry, X-ray photoelectron spectroscopy, nitrogen adsorption/desorption measurements for surface area and pore size distribution, scanning electron microscopy, transmission electron microscopy, galvanostatic cycling, and cyclic voltammetry tests to compare them with those of the SiNP/C composite. The SiNP/HC composite showed significantly better cycle life and efficiency than the SiNP/C, with minimal increase in electrode thickness after long cycles. A hybrid composite, SiNP/HC@Gr, prepared by physical mixing of the SiNP/HC and Gr at a 50:50 weight ratio, exhibited even better cycle life and efficiency than the SiNP/HC at low capacity. Thus, silicon/carbon composites designed to have hollow spaces capable of accommodating volume expansion were found to be highly effective for long cycle life of silicon-based composites. However, further study is required to improve the low initial coulombic efficiency of SiNP/HC and SiNP/HC@Gr, which is possibly because of their high surface area causing excessive electrolyte decomposition for the formation of solid-electrolyte-interface layers.

• Nuclear Engineering and Technology
• /
• v.42 no.5
• /
• pp.552-561
• /
• 2010

This study investigates the solubility of neptunium (Np) in the deep natural groundwater of the Korea Atomic Energy Research Institute Underground Research Tunnel (KURT). According to a Pourbaix diagram (pH-$E_h$ diagram) that was calculated using the geochemical modeling program PHREEQC 2.0, the redox potential and the carbonate ion concentration both control the solubility of neptunium. The carbonate effect becomes pronounced when the total carbonate concentration is higher than $1.5\;{\times}\;10^{-2}$ M at $E_h$ = -200 mV and the pH value is 10. Given the assumption that the solubility-limiting stable solid phase is $Np(OH)_4(am)$ under the reducing condition relevant to KURT, the soluble neptunium concentrations were in the range of $1\;{\times}\;10^{-9}$ M to $3\;{\times}\;10^{-9}$ M under natural groundwater conditions. However, the solubility of neptunium, which was calculated with the formation constants of neptunium complexes selected in an OECD-NEA TDB review, strongly deviates from the value measured in natural groundwater. Thus, it is highly recommended that a prediction of neptunium solubility is based on the formation constants of ternary Np(IV) hydroxo-carbonato complexes, even though the presence of those complexes is deficient in terms of the characterization of neptunium species. Based on a comparison of the measurements and calculations of geochemical modeling, the formation constants for the "upper limit" of the Np(IV) hydroxo-carbonato complexes, namely $Np(OH)_y(CO_3)_z^{4-y-2z}$, were appraised as follows: log $K^{\circ}_{122}\;=\;-3.0{\pm}0.5$ for $Np(OH)_2(CO_3)_2^{2-}$, log $K^{\circ}_{131}\;=\;-5.0{\pm}0.5$ for $Np(OH)_3(CO_3)^-$, and log $K^{\circ}_{141}\;=\;-6.0{\pm}0.5$ for $Np(OH)_4(CO_3)^{2-}$.