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Comparison of the Nutritional Composition of Bullfrog Meat from Different Parts of the Animal

  • Zhu, Yanli;Bao, Min;Chen, Chong;Yang, Xiaoli;Yan, Wenliang;Ren, Fazheng;Wang, Pengjie;Wen, Pengcheng
    • Food Science of Animal Resources
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    • v.41 no.6
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    • pp.1049-1059
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    • 2021
  • The objective of this study was to evaluate the nutritional content of bullfrog meat from different parts of the animal, including fore-chest, thigh and calf. Bullfrog meat was found to be a rich source of proteins, essential amino acids and minerals, but with a low fat content, compared with other aquatic meat products. There was no significant difference (p>0.05) between thigh and calf in mineral content (K, P, Na, Mg, Ca, Zn, Fe, Cu, and Mn), but the contents of K, P, and Mg were higher in thigh and calf than in the fore-chest (p<0.05). The salt-soluble, water-soluble and insoluble protein bands in sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) electrophoresis, from fore-chest, thigh and calf were similar, with the most abundant bands being 35 kDa (salt-soluble protein), 35-48 kDa (water-soluble protein) and 48 kDa (insoluble protein). The results showed that the insoluble protein content in the fore-chest meat was higher than that in the thigh meat and calf meat, but the salt-soluble protein fraction was the most abundant in thigh meat. These results showed that the nutrients in different parts of bullfrog meat were different.

Quantitative Analysis of Phenolic Compounds in Different parts of Panax ginseng C.A. Meyer and Its Inhibitory Effect on Melanin Biosynthesis (인삼의 부위별 페놀성 성분 함량 및 멜라닌 생성억제효과)

  • Hwang, Eun-Young;Choi, Sang-Yoon
    • Korean Journal of Medicinal Crop Science
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    • v.14 no.3
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    • pp.148-152
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    • 2006
  • Comparison of four phenolic compounds among three different parts of Panax ginseng C.A. Meyer was performed in this study. Contents of esculetin, p-coumaric acd, quercetin, maltol in the ethyl acetate fraction were determinated by HPLC analysis. The main root has a highest concentration of p-coumaric acid and the leave has a highest concentration of quercetin and esculetin. This ethyl acetate fraction of the leaves exhibited higher depigmenting activity and lower cell toxicity than the other parts of ginseng. In addition, it showed that quercetin and esculetin among phenolic compounds highly inhibited melanin biosynthesis in ginseng. It implies that leaves of ginseng may be used as skin whitening herb. Quercetin and esculetin proved to be active compounds in the leaves of ginseng.

Lock-In Thermography Based NDT of Parts for the Automotive Industry

  • Bohm, Stefan;Hellmanns, Mark;Backes, Andreas;Dilger, Klaus
    • Journal of Adhesion and Interface
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    • v.7 no.4
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    • pp.10-12
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    • 2006
  • The successful use of adhesively bonded parts depends on the defect-free bond of the components. Therefore it is necessary to detect relevant faults and defects in an early state of the production. A 100% test should be pursued, but especially at complicated structures the detection of defects is not easy. Possible testing methods, which show a high potential for the NDT of adhesively bonded parts, are thermography based NDT methods. At present mainly two different procedures of active thermography are being used: Pulse and Lock-In Thermography. With pulse thermography the examined material is warmed up with a short energy pulse (light, eddy current or ultrasonic pulse) and the heat response is recorded after a certain time. The result is an infrared image which indicates material defects in different depths. This paper presents a variety of images showing the capability of Lock-In Thermography to image subsurface defects. Several examples of adhesives joints qualify the ultrasonic Lock-In-Thermography for the in-process quality control for adhesive bonded components.

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Study on the grading standard of Panax notoginseng seedlings

  • Chen, Lijuan;Yang, Ye;Ge, Jin;Cui, Xiuming;Xiong, Yin
    • Journal of Ginseng Research
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    • v.42 no.2
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    • pp.208-217
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    • 2018
  • Background: The quality differences in seedlings of medicinal herbs often affect the quality of medicinal parts. The establishment of the grading standard of Panax notoginseng seedlings is significant for the stable quality of medicinal parts of P. notoginseng. Methods: To establish the grading standard of P. notoginseng seedlings, a total of 36,000 P. notoginseng seedlings were collected from 30 producing areas, of which the fresh weight, root length, root diameter, bud length, bud diameter, and rootlet number were measured. The K-means clustering method was applied to grade seedlings and establish the grading standard. Results: The fresh weight and rootlet number of P. notoginseng seedlings were determined as the final indices of grading. P. notoginseng seedlings from different regions of Yunnan could be preliminarily classified into four grades: the special grade, the premium grade, the standard grade, and culled seedlings. Conclusion: The grading standard was proven to be reasonable according to the agronomic characters, emergence rate, and photosynthetic efficiency of seedlings after transplantation, and the yields and contents of active constituents of the medicinal parts from different grades of seedlings.

The Study on the Image of a Woman's Body Exposure Expressed in Modern Fashion (현대패션에 표현된 여성인체 노출의 이미지에 관한 연구)

  • Kim, Sun-Young
    • Journal of the Korean Society of Costume
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    • v.57 no.1 s.110
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    • pp.28-38
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    • 2007
  • This study is on the image of a woman's body exposure, expressed in various situations or images in the modern fashion. The results of this study can be summarized as the following. First, either the exposure or stress of a woman's specific body parts like breast, waist, hips, or legs which can be sensed totally different from man's or the ironic disclosure of body parts always lapped around emphasizes femininity by giving full play the unique sexual beauty of a woman's body. Second, the desire of disclosure to have others' attention with the concealment as suggestive exposure expresses the eroticism. The modified eroticism is found different from the conventional concept and is based on the desire to make others notice one's existence continually by the sexual exposure dress particularly to entire the other sex, the dismantlement of changing an underwear to an outer-dress, and so forth. Third, both exposure of a woman's sexual body parts and expression of exposure to the utmost by laying a woman's entire body bare can mean sex liberty in the laissez-faire generation. This may suggest a pleasure-oriented way of thinking of the self-consolation rather than showing others, or feature the personality and the liberty endowed women with.

Activities of Several Hydrolytic Enzymes in the Pear Leaves Affected by Rust Fungus, Gymnosporangium haraeanum Sydow (배나무적성병 병반조직의 몇가지 가수분해효소의 활성)

  • Kim K. C.;Cho B. H.;Kook J. A.
    • Korean journal of applied entomology
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    • v.17 no.3 s.36
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    • pp.139-142
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    • 1978
  • Activities of several hydrolytic enzymes in the rusted pear loaves were estimated. Tested enzymes were cellulase (Cx), invertase $\beta-amylase$, pectinase (pectinmethylesterase and polygalacturonase), and phosphatase. Enzyme activities represented by pH value-enzyme activitycurve. Activities of Cx. invertase. and $\beta-amylase$ were higher in the healthy part than those in the near-lesion and lesion parts. and showed the maximal activities around pH 7.0. On the other hand, activities of pectinase and phosphatase were higher in the lesion and near-lesion parts than in the healthy part. Pectinmethylesterase activities in the healthy and diseased parts were different with different curve-pattern as the pH of treating solution changed.

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Biodiversity of Bacterial lipase genes

  • Kim, Hyung-Kwoun
    • Proceedings of the Korean Society for Applied Microbiology Conference
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    • 2001.06a
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    • pp.163-164
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    • 2001
  • A number of bacterial species produce extracellular lipases. Among them, many lipase genes have been cloned and sequenced. A comparison of primary sequences revealed only very limited sequence homology among them. Based on the sequence homologies and molecular sizes (Mr), bacterial lipases were classified into four discrete groups. From soil samples taken around Taejon, five different lipase-producing bacteria were isolated; Proteus vulgaris K80, Bacillus stearothermophilus Ll, B. pumilus B26, Staphylococcus haemolyticus L62, S. aureus B56. Nucleotide sequence analysis showed that Staphylococcus lipase genes (L62 and B56) composed of pre-pro-mature parts, Bacillus lipase genes (Ll and B26) pre-mature parts, and Proteus lipase gene (K80) mature part only. In addition, the molecular sizes of their mature parts were quite different from 19,000 to 45,000. Finally, they had very little homology (less than 20%) in their amino acid sequences. Judging from the above results, lipase K80 belonged to bacterial lipase Group I, lipase L1 and lipase B26 Group III, and lipase L62 and lipase B56 Group IV. This diversity in their primary structures was also reflected in their enzymatic properties; temperature effects, pH effects, substrate specificity, detergent effects, and so on.

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Antioxidant Activity and Phenolic Content of Different Parts of Lotus and Optimization of Extraction Condition using Response Surface Methodology

  • Jang, Jae Young;Ahn, Jong Hoon;Jo, Yang Hee;Hwang, Bang Yeon;Lee, Mi Kyeong
    • Natural Product Sciences
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    • v.25 no.1
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    • pp.44-48
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    • 2019
  • Nelumbo nucifera Gaertn. (Nymphaeaceae) is commonly called lotus and its leaves are widely been used as functional ingredients due to its antioxidant activity. For maximum efficacy, optimized extraction condition was established using response surface methodology. The high F-values, low p-values and insignificant p-value for lack-of-fit supported the fitness of the model and yielded the second-order polynomial regression for the antioxidant activity. The optimized extract was obtained by the extraction of 1 g of lotus leaves with 40 mL of 50% MeOH at $10.0^{\circ}C$, which exerted 70.1% antioxidant activity. Close correlation between phenolic content and antioxidant activity suggested phenolic compounds as active constituents of lotus leaves. In addition, comparison of different parts of lotus demonstrated the most potent antioxidant activity of flowers, followed by leaves and roots. Taken together, these results provide useful information about lotus leaves for the development as antioxidant ingredients. In addition, flowers and roots as well as leaves are suggested as good sources for antioxidant activity.