• Food Science and Preservation
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• v.22 no.3
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• pp.335-344
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• 2015

The objective of this study was to determine the rheological characteristics and sensory evaluation of yanggaeng by using the functional properties of Momordica charantia. Dried Momordica charantia was roasted at $180^{\circ}C$ to remove its bitter taste. The results of the study were as follows : The phenolic compound of Momordica charantia was $6.30{\pm}0.17mg/g$ in water extracts, which was the highest extractive rate. The anti-oxidant activity of non-roasted and roasted samples was determined in various phenolic concentrations at $50{\sim}200{\mu}g/mL$. The DPPH activities of non-roasted and roasted Momordica charantia water and ethanol extracts were 74.06~92.71% and 86.06~94.07%, respectively. The ABTS were 36.26~98.03% and 67.02~99.60% in water and ethanol extracts, respectively. The anti-oxidant protection factor of water and ethanol extracts were 2.19~2.25 PF and 2.20~2.36 PF respectively, and TBARS were 13.81~40.97% and 23.32~82.47%, respectively. The anti-oxidant activity of ethanol extracts was higher than that of water extracts at low phenolics concentration of $50{\mu}g/mL$, while the roasted sample was higher than the sample that was not roasted. The ${\alpha}$-glucosidase inhibition activity of non-roasted Momordica charantia ethanol extracts was higher than that of water extracts, showing that there were increasing pattern depending on the increases in the phenolics concentration of Momordica charantia. The texture, such as hardness, springiness, cohesiveness, chewiness and color changed in proportion to the concentration of Momordica charantia powder. Moreover sensory characteristics, such as color, flavor, taste, texture and overall acceptability of the non-roasted sample changed in proportion to the concentration of Momordica charantia powder. However, in the roasted sample, the sensory characteristics was improved at a lower concentration (below 1%). Thus, when the yanggang was prepared by Momordica charantia powder as a minor ingredient, it would be desirable to add it after roasting, in consideration of its functional and sensory properties, and at appropriate concentration on below 1%.

• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.2
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• pp.184-189
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• 2008

This study was conducted to analyze components of the fruit and stem of Vitex rotundifolia as part of a study on the nutritional and functional materials, and the development of a functional food. General components of V. rotundifolia fruit are moisture 12.92%, carbohydrate 78.67%, crude protein 3.22%, crude fat 1.73% and 3.46% crude ash. V. rotundifolia stem was moisture 11.30%, carbohydrate 80.87%, crude protein 4.78%, crude fat 0.64 % and 2.41% crude ash. The content of V. rotundifolia reducing sugar was 646.07 mg% (fruit) and 1,547.97 mg% (stem). The total amount of free sugar was fruit 5.66 mg% and stem 90.79 mg%. The content of soluble protein was 3,268.12 mg% in fruit and 4,927.55 mg% in stem. The polyphenol compound content was 608.06 mg% and 808.06 mg%, respectively. Total amount of hydrolyzed amino acid of V. rotundifolia fruit and stem were 3,095.75 mg% and 2,135.84 mg%, while that of free amino acid of fruit and stem were 79.99 mg%, 81.20 mg%, among which cysteine (2,010.82 mg%) was the highest in the V. rotundifolia fruit. In the results of mineral analysis, the content of K was the highest in fruit (2,184.00 mg%) and stem (1,469.20 mg%).

• Korean Journal of Pharmacognosy
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• v.50 no.1
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• pp.59-64
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• 2019

Cudrania tricuspidata Bureau (Moraceae) has been used for physical weakness, impotence and insomnia in traditional Korean medicine. In this study, cudratricusxanthone A and cudraxanthone D were isolated from roots of C. tricuspidata and quantification were achieved by using high performance liquid chromatography (HPLC) method with diode array detector. The isolated compound was identified by NMR analysis and HPLC method was validated by linearity, precision and specificity test. The results showed that calibration curves of two compounds indicated great linearity with a correlation coefficient ($R^2$) of 0.9976 and 0.9995. The limits of detection (LOD) for cudratricusxanthone A and cudraxanthone D were 1.15, $0.11{\mu}g/ml$. Intra-day precision of cudratricusxanthone A and cudraxanthone D were 0.32~1.99%, 0.09~3.32% and inter-day precision were 0.59~2.40%, 0.28~1.55% RSD (%) values, respectively. The specificity was confirmed by chromatograph and quantitative contents of cudratricusxanthone A and cudraxanthone D were $0.46{\pm}0.02%$ and $1.53{\pm}0.06%$. Therefore, this study can be used as a basic research data for the quantitative analysis of derived compounds from roots of C. tricuspidata.

• Food Science and Preservation
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• v.12 no.3
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• pp.216-222
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• 2005

This study was carried out to establish the preparation condition of muskmelon jam. A central composite design was applied to investigate effects of muskmelon paste content(40, 45, 50, 55, 60 g), fructose ratio of sugar(20, 35, 50, 65, $80\%$) and pectin addition(l, 2, 3, 4, 5 g). The maximum sugar content was 61.48 $^{\circ}$Brix in 41.04 g of muskmelon paste content, $48.10\%$ of fructose ratio of sugar and 2.12 g of pectin content. The maximum value of softness was 2.71 g in 45.06 g of muskmelon paste content, $79.46\%$ of fructose ratio of sugar and 2.71 g of pectin addition. The minimum value of jelly strength was $0.04\;g{\cdot}cm$ in 47.80 g of muskmelon paste content, $63.0\%$ of fructose ratio of sugar and 1.99 g of pectin addition. The maximum value of organoleptic overall palatability was 5.89 in 55.65 g of muskmelon paste content, $73.19\%$ of fructose ratio of sugar and 2.42 g of pectin addition. The optimum conditions predicted for each corresponding physicochemical and organoleptic properties of muskmelon jam were 55.2 g(muskmelon paste content), $76.3\%$(fructose ratio of sugar) and 2.5 g(pectin addition).

• The Korean Journal of Mycology
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• v.14 no.2
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• pp.131-139
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• 1986

Cultural and nutritional conditions for Lyophyllum decastes and its chemical composition in a synthetic medium were investigated. The optimal temperature and pH for the production of mycelium were $25^{\circ}C$ and pH 7.5. The mycelium yield was the highest on 15th day. Among the carbon sources, glucose and CMC were the best for the production of mycelium and their optimal concentrations were 3 and 6%, respectively. As an organic nitrogen, proteose peptone was the best and $(NH_4)_2HPO_4$ as an inorganic nitrogen was good. The optimal concentration of proteose peptone and $(NH_4)_2HPO_4$ were 2 and 0.2%, respectively. The optimal ratio of glucose to proteose peptone for production of mycelium was 10 : 1. Also, the optimal concentrations of $K_2HPO_4$ and $MgSO_4$ were 0.2 and 0.06%, respectively and that of $CaCl_2$ was 0.1%. Among the bioextracts, yeast extract was the most effective and its optimal concentration was 1.5%. In chemical components of the mycelium of Lyophyllum decastes, total sugar, crude protein and crude fat were 34.80, 28.35 and 2.50%, respectively. Its ash was 7.57% and crude fiber 11.99%.

• Journal of Korean Society of Environmental Engineers
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• v.28 no.1
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• pp.104-110
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• 2006

Growth in population and urbanization has progressively increased the loadings of pollutants from non-point sources as well as point sources. Accordingly, release of contaminants from non-point sources, released with surface runoff of rainwater, is influenced by atmospheric phenomena, geology, and topography. This makes the control of non-point source difficult. Therefore, this study intends to reveal the characteristics of runoff and particle size distribution to observe the fundamental characteristics of runoff. Experiments were carried out at inner road of research center. Average concentration of runoff ranged from 26.8 to 126.4 mg/L for SS and $COD_{Cr}\;15.3{\sim}117.7mg/L,\;TN\;0.07{\sim}5.16mg/L,\;TP\;0.06{\sim}0.49mg/L$ and heavy metals $0.00{\sim}0.29mg/L$. First flush, indicated wash off of pollutant at first rain, was observed for all types of pollutants. Most pollutants revealed a very close correlation with SS ($R^2=0.93{\sim}0.99$). After analyzing characteristics of particle, particle was finer than that from previously examined data.

• Asian-Australasian Journal of Animal Sciences
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• v.30 no.11
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• pp.1550-1556
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• 2017

Objective: This study estimated the genetic parameters for productive and reproductive traits. Methods: The data included production and reproduction records of animals that have calved between 1979 and 2013. The genetic parameters were estimated using multivariate mixed models (DMU) package, fitting univariate and multivariate mixed models with average information restricted maximum likelihood algorithm. Results: The estimates of heritability for milk production traits from the first three lactation records were $0.03{\pm}0.03$ for lactation length (LL), $0.17{\pm}0.04$ for lactation milk yield (LMY), and $0.15{\pm}0.04$ for 305 days milk yield (305-d MY). For reproductive traits the heritability estimates were, $0.09{\pm}0.03$ for days open (DO), $0.11{\pm}0.04$ for calving interval (CI), and $0.47{\pm}0.06$ for age at first calving (AFC). The repeatability estimates for production traits were $0.12{\pm}0.02$, for LL, $0.39{\pm}0.02$ for LMY, and $0.25{\pm}0.02$ for 305-d MY. For reproductive traits the estimates of repeatability were $0.19{\pm}0.02$ for DO, and to $0.23{\pm}0.02$ for CI. The phenotypic correlations between production and reproduction traits ranged from $0.08{\pm}0.04$ for LL and AFC to $0.42{\pm}0.02$ for LL and DO. The genetic correlation among production traits were generally high (>0.7) and between reproductive traits the estimates ranged from $0.06{\pm}0.13$ for AFC and DO to $0.99{\pm}0.01$ between CI and DO. Genetic correlations of productive traits with reproductive traits were ranged from -0.02 to 0.99. Conclusion: The high heritability estimates observed for AFC indicated that reasonable genetic improvement for this trait might be possible through selection. The $h^2$ and r estimates for reproductive traits were slightly different from single versus multi-trait analyses of reproductive traits with production traits. As single-trait method is biased due to selection on milk yield, a multi-trait evaluation of fertility with milk yield is recommended.

• Korean Journal of Environmental Agriculture
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• v.15 no.3
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• pp.282-288
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• 1996

Because of the high water content of the household garbage, it is difficult to compost it. Therefore, this study was conducted to investigate the possibility of using coal fly ash as humidity conditioner for the household garbage composting. The summarized results are as follows : 1. The maximum temperatures were $35^{\circ}C$ in spring, $47^{\circ}C$ in summer, and $43^{\circ}C$ in winter during the composting periods. 2. The mass was reduced to 70.5% after 60 days. The average volume reduced down to 74.7% after 60 days. 3. The seasonal variation of pH values showed a similar tendency and reached 8.5 after 60 days. 4. The water content was reduced at an early stage of composting and not much changed thereafter. It had 49.7% in spring, 33.9% in summer, and 56.5% in winter after 60 days. Ash contents were not much changed during the composting periods. 5. The contents of inorganic compounds were in the range of $0.06{\sim}4.03%$ $P_2O_5$, $0.01{\sim}2.87%$ CaO, $0.18{\sim}1.43%$ MgO, and $0.39{\sim}2.03%$ $K_2O$. Heavy metal contents were in the range of $ND{\sim}14.08$ Hg ${\mu}g/kg$, $ND{\sim}0.80$ Cd mg/kg, $4.99{\sim}28.95$ Cu mg/kg, $ND{\sim}242.62$ Cr mg/kg, $ND{\sim}20.24$ Pb mg/kg, and $ND{\sim}59.87$ Zn mg/kg.

• Korean Journal of Food Science and Technology
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• v.52 no.3
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• pp.290-295
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• 2020

In this study, the optimum conditions were established for anthocyanidin extraction from sweet potato tips and tubers. The dependent variables of ethanol concentration (X1), citric acid concentration (X2), and extraction temperature (X3) were designed using a central composite design. All three variables significantly affected anthocyanidin extraction, and the influence of X1 was greater than that of X2 and X3. The highest anthocyanidin content in tips and tubers were 26.58±0.07 and 117.32±0.39 mg/100 g at 50% (X1), 0.3% (X2), and 50℃ (X3), respectively. The optimal extraction conditions for the tips were 56.10% (X1), 0.25% (X2), and 52.24℃ (X3) and tubers were 55.08% (X1), 0.30% (X2), and 53.06℃ (X3). The predicted values under optimal extraction conditions were 27.45 and 119.61 mg/100 g, and the experimental values were 27.09±0.11 and 118.72±0.67 mg/100 g, respectively. The extraction conditions were validated by comparing the predicted and actual values with those of 98.69 and 99.26%, respectively.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.1
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• pp.24-29
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• 2014

The effects of Lycii fructus and Lycii folium on osteoporosis and serum cholesterol levels were tested in ovariectomized (OVX) rats. Twenty-four female Sprague-Dawley rats were divided into four groups: Sham group (sham-operated), Control group (OVX, ovariectomized model), LCF group (Ovx+Lycii fructus extract), and LCL group (OVX+Lycium folium extract). After 8 weeks, the OVX ($330{\pm}5.39$ g), LCF ($315{\pm}2.99$ g), and LCL ($318{\pm}2.06$ g) groups showed increased body weight compared with sham group ($281{\pm}1.71$ g). The levels of serum osteocalcin (OC) also increased in the LCF ($444.6{\pm}26.9$ ng/mL) and LCL ($407{\pm}18.9$ ng/mL) groups compared with the OVX group ($107{\pm}3.52$ ng/mL). The activities of serum alkaline phosphatase (ALP) increased in the LCF ($108{\pm}2.7$ U/L) and LCL ($407{\pm}18.9$ ng/mL) groups compared with the OVX group ($95{\pm}2.9$ U/L). Stereomicroscopy found that the low bone density that developed in the OVX group was significantly reversed in the LCF and LCL groups after 8 weeks. We also obtained molecular-based in vivo evidence that supports a mechanism of action involving novel estrogen receptor ($ER{\alpha}$) modulator in the uterus. We found that expression of ER${\alpha}$ mRNA in the OVX rat uterus was elevated by Lycium chinense. These results suggest that Lycii fructus and Lycii folium administered to rats during 8 weeks after oophorectomy may partially recover postmenopausal osteoporosis or delay the progression of osteoporotic changes.