• Title/Summary/Keyword: functional effect

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Investigation of Isomerism in Anthracene-Isothiouronium Salts and Application of these Salts for Anion Sensing

  • Nguyen, Quynh Pham Bao;Kim, Jae-Nyoung;Kim, Taek-Hyeon
    • Bulletin of the Korean Chemical Society
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    • v.30 no.9
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    • pp.2093-2097
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    • 2009
  • Novel fluorescent anion chemosensors based on anthracene-isothiouronium derivatives were synthesized. Isomerism due to the intramolecular mobility in these isothiouronium salts was detected by $^1H$ NMR spectroscopy. The effect of the substituent, temperature and solvent on the isomerism was also examined. The anthracene-isothiouronium sensor showed significant fluorescent enhancement upon the addition of various anions such as fluoride, acetate, and dihydrogen phosphate, even in the presence of water.

Functional Ingredients of Maize and Their Variation (옥수수 기능성 물질의 종류와 변이)

  • Kim Sun Lim;Choi Byung Han;Park Seung Ue;Moon Hyun Guey
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.41 no.spc1
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    • pp.46-68
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    • 1996
  • The objective of this report is to review the up to present papers including 79 references about functional ingredients in maize and their variations. Maize is a good source of such antioxidants as ${\alpha}-,\;{\gamma}-tocopherols,\;{\alpha}-,\;{\beta}-carotene,\;{\beta}-cryptoxanthin$, zeaxanthin, quercetin and chlorogenic acid. Unsaponifiable standard extracts of Zea mays L. (ZML) have a beneficial effect on various dental diseases. Flavonoids, flavonoid biosynthetic pathway and their controling genes were also reviewed in this report. Flavonoids are required for successful fertilization in maize pollen, and maysin has a potent antibiotic activities to earworm and fall armyworm in maize silks. Maize silks have been used in traditional medicine for diuretic, vascular diseases and diabetes, etc. and boiling water extracts of maize silk have hemodynamic effects, but their ingredients still remain obscure.

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Tocopherols and Tocotrienols in Cereal Grains (화곡류 종실의 토코페롤과 토코트리에놀 연구현황과 전망)

  • 이동진;이지영
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.48
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    • pp.1-12
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    • 2003
  • Vitamin E is a fat-soluble vitamin that exists in eight different forms, which are $\alpha$, $\beta$, $\gamma$, and $\delta$ tocopherol, and $\alpha$, $\beta$, $\gamma$, and $\delta$ tocotrienol. Tocopherols and tocotrienols are important antioxidant in foods, feeds and their raw materials, where they scavenge lipid radicals. Each form has its own biological activity, the measure of potency or functional use in the body. Antioxidants such as vitamin E act to protect cells against the effects of free radicals, which are potentially damaging by-products of the body's metabolism. Free radicals can cause cell dam-age that may contribute to the development of cardiovascular disease and cancer, The content of tocopherols and tocotrienols vary depending on the environmental condition such as growing regions, temperature, crops and varieties. This report deals with chemical and physical properties and extends to their nutritional and health effect on the tocopherols and tocotrienols in cereal grains.

Speech Therapy for Functional Articulation Disorders Using the Dynamic Palatogram - improvement of lateralized /ㅅ/- (Dynamic Palatogram을 이용한 기능적 구음장애의 언어치료가 음성 지표에 미치는 영향)

  • 박혜숙;최홍식;김광문;신미성
    • Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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    • v.5 no.1
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    • pp.29-37
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    • 1994
  • We report the clinical treatment experience of a case with severe lateralization articulation disorder especially in /ㅅ/, who was treated with using a dynamic palatogram. The patient was 16-year-old male patient and he was taken several attempts of traditional speech therapy without improvement The authors tried to treat him with newly designed dynamic palatogram for two period with good results. We are going to review brief clinical experience with the patient and discuss the effectiveness and indications of the dynamic palatogram. In this study, we can summarize the effect of treatment as follows; Lateralization of the /ㅅ/ was improved markedly with using the dynamic palatogram, and we thought the improvement was achieved mainly by visual feedback control.

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A Study on the Characteristics of Plasma Blacks Prepared by Plasma Pyrolysis Over Metals Coated Honeycomb Catalysts

  • Park, Soo-Yeop;Lee, Joong-Kee;Yoo, Kyung-Seun;Cho, Won-Ihl;Baek, Young-Soon
    • Carbon letters
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    • v.4 no.2
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    • pp.74-78
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    • 2003
  • Four kinds of plasma blacks were prepared by plasma pyrolysis under various metallic catalysts coated on honeycomb, and investigated the catalytic effect on the characteristics of the plasma blacks prepared under plasma pyrolysis condition. Pt, Pt-Rh, and Pd catalysts were employed as active materials to prepare the plasma blacks. In the experimental range studied, the metallic catalysts influenced on surface area, particle size, surface oxygen content and electrical conductivity of the plasma blacks prepared. It was showed that more dense particle of plasma blacks were prepared under existence of metallic catalysts. Presence of the metallic catalyst reduces the electrical resistivity of plasma blacks due to the decrease in the amount of oxygen functional groups. The highest electrical conductivity of plasma black was observed in the Pt catalyst and then followed by those Pt-Rh, Pd and bare cordierite honeycomb.

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BIFURCATION OF A PREDATOR-PREY SYSTEM WITH GENERATION DELAY AND HABITAT COMPLEXITY

  • Ma, Zhihui;Tang, Haopeng;Wang, Shufan;Wang, Tingting
    • Journal of the Korean Mathematical Society
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    • v.55 no.1
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    • pp.43-58
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    • 2018
  • In this paper, we study a delayed predator-prey system with Holling type IV functional response incorporating the effect of habitat complexity. The results show that there exist stability switches and Hopf bifurcation occurs while the delay crosses a set of critical values. The explicit formulas which determine the direction and stability of Hopf bifurcation are obtained by the normal form theory and the center manifold theorem.

A Study on the Physical Properties and the Handle of Silver Combined Knit (은사 혼합 편성물의 물성 및 태 연구)

  • Kwon, Do-Yeon;Kwon, Young-Ah
    • Fashion & Textile Research Journal
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    • v.11 no.4
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    • pp.641-647
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    • 2009
  • The purpose of this study was to evaluate the physical properties and handle of knitwears made with silver yarns. The four different knitted fabrics were made and compared: cotton(C), cotton/silver(CS), polyester(P), and polyester/silver(PS). If fabrics knitted with silver combined yarns, their electrical shield properties, UV-cut properties, anti-static properties, and air permeability were improved. As an additional effect this also improves the antibacterial properties of fabrics. It was found that overall physical properties and functional properties were improved by using silver yarn with cotton. The silver knitted fabric was found to be improved its softness and fullness hand for apparel.

Bioactive Components in Milk (우유의 생리활성 물질)

  • Kim, Geun-Bae
    • Journal of Dairy Science and Biotechnology
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    • v.28 no.1
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    • pp.43-52
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    • 2010
  • In addition to the nutritional values, milk has a wide range of bioactive compounds which have been found to be increasingly important for physiological and biochemical functions on human metabolism and health. Bioactive components in milk comprise specific proteins, peptides, lipids and carbohydrates. Especially, milk proteins are known to exert a wide range of nutritional, functional, and biological activities. And milk proteins are considered the most important source of bioactive peptides, including antihypertensive, antithrombotic, antimicrobial, antioxidative, immunomodulatory, and opioid peptides. Many ingredients containing specific bioactive peptides derived from milk protein hydrolysates have been launched on the market and are currently under development. In future studies more emphasis should be given to the health-promoting effect in the well-defined human clinical studies for the successful development of function foods based on the milk-derived bioactive components.

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Study on Comparison of Industrial Static Analysis Tools to Verify the Design Principles for Software Unit Design and Implementation of ISO 26262 (ISO 26262의 소프트웨어 설계원리 적용에 대한 검증 도구의 비교 연구)

  • Heo, Jeho;Lee, Hongseok;Ko, Byeonggak
    • IE interfaces
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    • v.25 no.4
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    • pp.416-421
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    • 2012
  • One of the activities to improve software quality in ISO 26262 is to apply the design principles for software unit design and implementation mentioned in ISO 26262-6, including the evaluation activity. Before evaluation activity, the tool is compared and selected for evaluation. Because the results of the tool a company selected might have an effect on product quality. In this paper, we suggest the method to compare industrial static analysis tools with some of "MISRA C : 2004 Exemplar Suite" and all lessons learned from comparing tools are described. The result on comparison shows that we just couldn't rely on a result of Static Analysis Tool and need to have another appropriate processes and guidelines to evaluate a software.

Physical Therapy Approaches for Respiratory Diseases (호흡계 질환의 물리치료적 접근방법)

  • Kim, Ki-Song
    • Journal of Korean Physical Therapy Science
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    • v.16 no.3
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    • pp.67-74
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    • 2009
  • Background: Various functional factors should be incorporated during assessment and intervention for patient rehabilitation. Stable respiratory function is one of required factors for functional restoration. To maximize respiratory physical therapy intervention outcome, it is required to understand clinical features of respiratory diseases and physical therapy approaches. Methods: Previous studies were systematically reviewed through computerized search. Methodological qualities of selected studies were evaluated and the levels of recommendations were determined. Results: Assessment for respiratory pattern and thoracic mobility is of importance to improve cardiopulmonary fitness during physical reconditioning. Application of optimal therapeutic protocol can increase thoracic mobility and respiratory function. Interdisciplinary communication is critical during rehabilitation for respiratory patients. Health care provider should have professional knowledge and experience for cardiopulmonary fitness and obligation to endeavor for patients' respiratory rehabilitation. It is necessary to standardize therapeutic intervention, and rehabilitative respiratory exercise should be applied to confirm the effects of intervention. Conclusion: Respiratory diseases that may reduce patients' quality of life and cardiopulmonary fitness should be resolved through physical therapy approaches. Through conducting research, effect of evidence-based and patients' function-oriented intervention can be determined.

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