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        1.
        2022.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        털부처꽃(Lythrum salicaria L.)은 전국에 분포하는 다년생 초본식물로 척박하고 습한 지역을 포함한 다양한 환경에서 잘 자라는 것으로 알려져 있다. 따라서 하천변, 척박지에서 정원 용, 화훼용 및 관상용 식물로 이용이 가능하다. 본 연구는 털 부처꽃의 적정 육묘 조건(토양종류, 플러그 트레이 셀 크기,파종립수, 액비농도 및 차광)을 조사하였다. 대조구(원예상토) 에서 재배된 유묘의 생육이 가장 우수하였다. 반면 피트모스 와 펄라이트의 혼합용토는 육묘기간이 지속되면서 생육수치 가 감소하는 경향을 나타냈다. 셀 크기는 용적이 가장 큰 162 셀에서 재배된 유묘의 생육이 우수하였으나, 200셀과 288셀에 서 자란 묘도 건강했다. 한편 유묘의 결주발생을 고려하면 셀 당 2립을 파종하는 것이 적합하였다. 액비 처리는 유묘의 생 육을 촉진하였다. 특히 Hyponex 1000배는 초장, 줄기직경, 엽수, 마디수, 근장, 지상부 생체중 및 지하부 생체중을 증가 시켰다. 또한 유묘의 생육은 55% 차광 하에서 우수하였다. 따 라서 털부처꽃의 가장 효과적인 생육조건은 원예상토가 충진 된 288셀 플러그 트레이에 셀 당 2립을 파종하고 Hyponex 1000배를 시비하면서 55% 차광 하에서 재배하는 것이었다.
        4,000원
        4.
        2017.07 구독 인증기관·개인회원 무료
        The advanced information technology leads to network age, making existing competitive advantages such as differentiation and cost leadership powerless in B2B context. The competitiveness of individual firm plays a significant role in enhancing the competitive advantage of a business network that a firm belongs to. The competitiveness of a business network depends on value co-creation, the interaction among firms in a network. Value co-creation has desirable and risky aspects. The increases in profits, brand reputation, and time and cost efficiency, client and supplier learning, etc. are positive aspects. But role conflicts, role ambiguity, and tension, etc. are negative outcomes. How can the industrial firm succeed in value co-creation with its partners in B2B context? The study focuses on the firm’s strategic marketing orientations as an antecedent of value co-creation. Strategic marketing orientations as the values and beliefs of the firm affect the collaboration with other firms during value co-creation. Previous literature assumes that a firm pursues one single strategic orientation. However, the study assumes that an industrial firm has entrepreneurial orientation, market orientation, long-term orientation, and relationship orientation. The study mostly focused on the relationships among those strategic marketing orientations. Based on these inter-relationships, the study proposed a set of value co-creation activity criteria such as information seeking, information sharing, personal interaction, responsible behavior, feedback, helping, advocacy, tolerance. Value co-creation has been evaluated by relationship performance such as trust and commitment. The study examined the relationships between strategic marketing orientations and value co-creation. Data was collected from 159 Korean manufacturers in B2B context and analyzed through structural equation modeling. The study provides evidence that entrepreneurial orientation affects market orientation positively and market orientation has positive effects on long-term orientation and relationship orientation, and long-term orientation and relationship orientation influence value co-creation directly. Value co-creation has a positive effect on relationship performance. The results of the study provide valuable implications to the mangers of industrial firms in B2B context. To succeed the value co-creation, the firm first has to look at the difference between strategic marketing orientations that the value co-creation partners pursue. In terms of selecting value co-creation partner, industrial firm with long-term orientation and relationship orientation will be more effective. Six activities of interactions during value co-creation play an important role in enhancing trust and commitment. The study contributes to the value co-creation literature by identifying strategic marketing orientations as independent variable influencing the value co-creation in B2B context. The study has several limitations that call for future research.
        5.
        2016.07 구독 인증기관 무료, 개인회원 유료
        43 5. Research Model Value Co-Creation Customer ParticipationㆍInformation seeking ㆍInformation sharing ㆍResponsible behavior ㆍPersonal interactionCustomer Citizenship ㆍFeedbackㆍAdvocacyㆍHelpingㆍToleranceRelationship PerformanceㆍTrust ㆍCommitment ㆍLoyaltyEntrepreneurial Value OrientationEntrepreneurial Orientation(EO)Relationship Orientation(RO)MarketOrientation(MO)H1H2H3H4H5H6H7H8 Hypotheses H1: Entrepreneurial Orientation will have a positive influence on customer participation behavior in value co-creation process H2: Market Orientation will have a positive influence on customer participation behavior in value co-creation process H3: Relationship Orientation will have a positive influence on customer participation behavior in value co-creation process H4: Entrepreneurial Orientation will have a positive influence on customer citizenship behavior in value co-creation process H5: Market Orientation will have a positive influence on customer citizenship behavior in value co-creation process H6: Relationship Orientation will have a positive influence on customer citizenship behavior in value co-creation process H7: Customer participation behavior in value co-creation process will have a positive influence on relationship performance H8: Customer citizenship behavior in value co-creation process will have a positive influence on relationship performance43 5. Research Model Value Co-Creation Customer ParticipationㆍInformation seeking ㆍInformation sharing ㆍResponsible behavior ㆍPersonal interactionCustomer Citizenship ㆍFeedbackㆍAdvocacyㆍHelpingㆍToleranceRelationship PerformanceㆍTrust ㆍCommitment ㆍLoyaltyEntrepreneurial Value OrientationEntrepreneurial Orientation(EO)Relationship Orientation(RO)MarketOrientation(MO)H1H2H3H4H5H6H7H8 Hypotheses H1: Entrepreneurial Orientation will have a positive influence on customer participation behavior in value co-creation process H2: Market Orientation will have a positive influence on customer participation behavior in value co-creation process H3: Relationship Orientation will have a positive influence on customer participation behavior in value co-creation process H4: Entrepreneurial Orientation will have a positive influence on customer citizenship behavior in value co-creation process H5: Market Orientation will have a positive influence on customer citizenship behavior in value co-creation process H6: Relationship Orientation will have a positive influence on customer citizenship behavior in value co-creation process H7: Customer participation behavior in value co-creation process will have a positive influence on relationship performance H8: Customer citizenship behavior in value co-creation process will have a positive influence on relationship performance43 5. Research Model Value Co-Creation Customer ParticipationㆍInformation seeking ㆍInformation sharing ㆍResponsible behavior ㆍPersonal interactionCustomer Citizenship ㆍFeedbackㆍAdvocacyㆍHelpingㆍToleranceRelationship PerformanceㆍTrust ㆍCommitment ㆍLoyaltyEntrepreneurial Value OrientationEntrepreneurial Orientation(EO)Relationship Orientation(RO)MarketOrientation(MO)H1H2H3H4H5H6H7H8 Hypotheses H1: Entrepreneurial Orientation will have a positive influence on customer participation behavior in value co-creation process H2: Market Orientation will have a positive influence on customer participation behavior in value co-creation process H3: Relationship Orientation will have a positive influence on customer participation behavior in value co-creation process H4: Entrepreneurial Orientation will have a positive influence on customer citizenship behavior in value co-creation process H5: Market Orientation will have a positive influence on customer citizenship behavior in value co-creation process H6: Relationship Orientation will have a positive influence on customer citizenship behavior in value co-creation process H7: Customer participation behavior in value co-creation process will have a positive influence on relationship performance H8: Customer citizenship behavior in value co-creation process will have a positive influence on relationship performance43 5. Research Model Value Co-Creation Customer ParticipationㆍInformation seeking ㆍInformation sharing ㆍResponsible behavior ㆍPersonal interactionCustomer Citizenship ㆍFeedbackㆍAdvocacyㆍHelpingㆍToleranceRelationship PerformanceㆍTrust ㆍCommitment ㆍLoyaltyEntrepreneurial Value OrientationEntrepreneurial Orientation(EO)Relationship Orientation(RO)MarketOrientation(MO)H1H2H3H4H5H6H7H8 Hypotheses H1: Entrepreneurial Orientation will have a positive influence on customer participation behavior in value co-creation process H2: Market Orientation will have a positive influence on customer participation behavior in value co-creation process H3: Relationship Orientation will have a positive influence on customer participation behavior in value co-creation process H4: Entrepreneurial Orientation will have a positive influence on customer citizenship behavior in value co-creation process H5: Market Orientation will have a positive influence on customer citizenship behavior in value co-creation process H6: Relationship Orientation will have a positive influence on customer citizenship behavior in value co-creation process H7: Customer participation behavior in value co-creation process will have a positive influence on relationship performance H8: Customer citizenship behavior in value co-creation process will have a positive influence on relationship performanceand relationship performance. 2. Conceptual framework 2.1 Entrepreneurial Value Orientation Entrepreneurial Orientation Entrepreneurial-oriented firms with risk-taking, proactivness, and innovativeness focus on finding new market opportunities and reshaping current operating areas (Hult and Ketchen 2001). Entrepreneurial orientation provides firms with first-mover advantages and has a positive effect on performance. Entrepreneurs create value through innovation with exploiting new opportunity and creating new product-market areas. Market Orientation Market-oriented firms create superior value through the understanding of customers’ needs and the capabilities to fulfill those identified needs (Jaworski & Kohli, 1993). The value creation of market-oriented firms is based on strong commitment to developing product innovation capabilities (Atuahen-Gima, 1996). Market orientation provides firms with market-linking capabilities that help create and deliver value to customers (O’Cass and Ngo, 2012). Relationship Orientation Interaction orientation An interaction orientation is regarded as a sustainable competitive advantage and a value rare and as a value creation driver. Interaction oriented firms with specific and actionable nature are characterized by analyzing individual customer, not a market, performing marketing activities with customers, not for customers, by emphasizing the importance of the relationship to firms (Ramini and Kumar, 2008). The relational performance of interaction orientation is measured by customer satisfaction, customer ownership, and positive word of mouth (Ramini and Kumar, 2008). Long-term orientation Long-term orientation also creates a sustainable competitive advantage through information on best-selling product, best allowable price, cooperative advertizing, etc (Ganesan 1994). Firms with short-term orientation focus on market exchange for profit in a transaction, but firms with long-term orientation focus on relational exchange for profit from joint synergies over a series of transactions, not the length of the relationships (Ganesan 1994). Relational elements like long-term orientation increases mutual commitment to enhance mutual profitability in buyer-seller relationships (Noordewier et al 1990). 2.2 Value co-creation The customers co-create value based on their roles as participants or co-creators in various value-creating processes (Vargo and Lusch 2008a). Joint value is created among customer, suppliers, competitors, and other stakeholders involved in the relationship (Gummesson 1999). The various approaches to value co-creation have discussed. A unified value co-creation concept is explained by three types of processes such as customer value-creating processes, supplier value-creating process, and encounter processes (Payne et al., 2008). Value co-creation behaviors consist of customer participation behavior and customer citizenship behavior. Customer participation behavior that they conceptualizedand relationship performance. 2. Conceptual framework 2.1 Entrepreneurial Value Orientation Entrepreneurial Orientation Entrepreneurial-oriented firms with risk-taking, proactivness, and innovativeness focus on finding new market opportunities and reshaping current operating areas (Hult and Ketchen 2001). Entrepreneurial orientation provides firms with first-mover advantages and has a positive effect on performance. Entrepreneurs create value through innovation with exploiting new opportunity and creating new product-market areas. Market Orientation Market-oriented firms create superior value through the understanding of customers’ needs and the capabilities to fulfill those identified needs (Jaworski & Kohli, 1993). The value creation of market-oriented firms is based on strong commitment to developing product innovation capabilities (Atuahen-Gima, 1996). Market orientation provides firms with market-linking capabilities that help create and deliver value to customers (O’Cass and Ngo, 2012). Relationship Orientation Interaction orientation An interaction orientation is regarded as a sustainable competitive advantage and a value rare and as a value creation driver. Interaction oriented firms with specific and actionable nature are characterized by analyzing individual customer, not a market, performing marketing activities with customers, not for customers, by emphasizing the importance of the relationship to firms (Ramini and Kumar, 2008). The relational performance of interaction orientation is measured by customer satisfaction, customer ownership, and positive word of mouth (Ramini and Kumar, 2008). Long-term orientation Long-term orientation also creates a sustainable competitive advantage through information on best-selling product, best allowable price, cooperative advertizing, etc (Ganesan 1994). Firms with short-term orientation focus on market exchange for profit in a transaction, but firms with long-term orientation focus on relational exchange for profit from joint synergies over a series of transactions, not the length of the relationships (Ganesan 1994). Relational elements like long-term orientation increases mutual commitment to enhance mutual profitability in buyer-seller relationships (Noordewier et al 1990). 2.2 Value co-creation The customers co-create value based on their roles as participants or co-creators in various value-creating processes (Vargo and Lusch 2008a). Joint value is created among customer, suppliers, competitors, and other stakeholders involved in the relationship (Gummesson 1999). The various approaches to value co-creation have discussed. A unified value co-creation concept is explained by three types of processes such as customer value-creating processes, supplier value-creating process, and encounter processes (Payne et al., 2008). Value co-creation behaviors consist of customer participation behavior and customer citizenship behavior. Customer participation behavior that they conceptualizedcomprises four dimensions including information seeking, information sharing, responsible behavior, and personal interaction. Customer citizenship behaviors include feedback, advocacy, helping, and tolerance (Yi, and Gong 2013). 2.3 Relationship performance Ulaga(2003) proposed to identify the linkage between relationship value and relationship variables including commitment, trust, satisfaction, and loyalty. The authors consider trust, commitment, and loyalty as measurement items of relationship performance. Trust is measured as a dependent variable in channel relationships. Commitment is a good indicator of long-term relationships (Morgan and Hunt, 1994) and has been used as the dependent variable in several relationship marketing models including buyer-seller relationship (kumar et al., 1995). Consumer loyalty is related to a motivation to maintain a relationship with a firm, including more resources, positive word of mouth (WOM), and repeat purchasing (Zeithaml, Berry, and Parasuraman 1996). Value drives loyalty and trust affects loyalty through its influence in creating value (Sirdeshmukh, Singh and Sabol 2002) 3. Plan for Data Collection and analysis The instrument used to test the hypotheses a mail survey. A draft questionnaire based on existing measurement scales for the research model will be drafted. This draft questionnaire will be pretested with academics and practitioners to check its content validity and terminology and modified accordingly. The modified questionnaire will be pilot tested to check its suitability and appropriateness for the target population before mailing. The sample population for this study will be business-to-business manufacturing firms in South Korea. The authors will undertake both confirmatory factor analysis and structural equation modeling to test our hypotheses using the SPSS 20 and AMOS 20. 4. Expected outcomes and contribution 4.1 Expected outcomes The analysis will identify whether or not the positive influence of entrepreneurial value orientation has on value co-creation including customer participation behavior and customer citizenship behavior. The relationship between the value co-creation and relationship performances will be identified. The more actively customers engage in the value co-creation process, the greater trust, commitment, and loyalty could be positively influenced. Value co-creation plays an important role in increasing relationship performance and could be regarded as a source of sustainable competitive advantage. 4.2 Contribution This study will be the first effort to identify between the relationship between value co-creation and relationship performance. This research will be the first empirical study to apply the concept of value co-creation to business-to-business firms. In terms of marketing academics, this study will contribute to broaden marketing research areas. Managers of business-to-business firms from the results of this study will recognize valuable information on how the extent of an individual’s orientations such as entrepreneurial orientation, market orientation, and relationship orientation affects value co-creation.comprises four dimensions including information seeking, information sharing, responsible behavior, and personal interaction. Customer citizenship behaviors include feedback, advocacy, helping, and tolerance (Yi, and Gong 2013). 2.3 Relationship performance Ulaga(2003) proposed to identify the linkage between relationship value and relationship variables including commitment, trust, satisfaction, and loyalty. The authors consider trust, commitment, and loyalty as measurement items of relationship performance. Trust is measured as a dependent variable in channel relationships. Commitment is a good indicator of long-term relationships (Morgan and Hunt, 1994) and has been used as the dependent variable in several relationship marketing models including buyer-seller relationship (kumar et al., 1995). Consumer loyalty is related to a motivation to maintain a relationship with a firm, including more resources, positive word of mouth (WOM), and repeat purchasing (Zeithaml, Berry, and Parasuraman 1996). Value drives loyalty and trust affects loyalty through its influence in creating value (Sirdeshmukh, Singh and Sabol 2002) 3. Plan for Data Collection and analysis The instrument used to test the hypotheses a mail survey. A draft questionnaire based on existing measurement scales for the research model will be drafted. This draft questionnaire will be pretested with academics and practitioners to check its content validity and terminology and modified accordingly. The modified questionnaire will be pilot tested to check its suitability and appropriateness for the target population before mailing. The sample population for this study will be business-to-business manufacturing firms in South Korea. The authors will undertake both confirmatory factor analysis and structural equation modeling to test our hypotheses using the SPSS 20 and AMOS 20. 4. Expected outcomes and contribution 4.1 Expected outcomes The analysis will identify whether or not the positive influence of entrepreneurial value orientation has on value co-creation including customer participation behavior and customer citizenship behavior. The relationship between the value co-creation and relationship performances will be identified. The more actively customers engage in the value co-creation process, the greater trust, commitment, and loyalty could be positively influenced. Value co-creation plays an important role in increasing relationship performance and could be regarded as a source of sustainable competitive advantage. 4.2 Contribution This study will be the first effort to identify between the relationship between value co-creation and relationship performance. This research will be the first empirical study to apply the concept of value co-creation to business-to-business firms. In terms of marketing academics, this study will contribute to broaden marketing research areas. Managers of business-to-business firms from the results of this study will recognize valuable information on how the extent of an individual’s orientations such as entrepreneurial orientation, market orientation, and relationship orientation affects value co-creation.43 5. Research Model Value Co-Creation Customer ParticipationㆍInformation seeking ㆍInformation sharing ㆍResponsible behavior ㆍPersonal interactionCustomer Citizenship ㆍFeedbackㆍAdvocacyㆍHelpingㆍToleranceRelationship PerformanceㆍTrust ㆍCommitment ㆍLoyaltyEntrepreneurial Value OrientationEntrepreneurial Orientation(EO)Relationship Orientation(RO)MarketOrientation(MO)H1H2H3H4H5H6H7H8 Hypotheses H1: Entrepreneurial Orientation will have a positive influence on customer participation behavior in value co-creation process H2: Market Orientation will have a positive influence on customer participation behavior in value co-creation process H3: Relationship Orientation will have a positive influence on customer participation behavior in value co-creation process H4: Entrepreneurial Orientation will have a positive influence on customer citizenship behavior in value co-creation process H5: Market Orientation will have a positive influence on customer citizenship behavior in value co-creation process H6: Relationship Orientation will have a positive influence on customer citizenship behavior in value co-creation process H7: Customer participation behavior in value co-creation process will have a positive influence on relationship performance H8: Customer citizenship behavior in value co-creation process will have a positive influence on relationship performance
        4,000원
        6.
        2015.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        KO mice provide an excellent tool to determine roles of specific genes in biomedical filed. Traditionally, knockout mice were generated by homologous recombination in embryonic stem cells. Recently, engineered nucleases, such as zinc finger nuclease, transcription activator-like effector nuclease and clustered regularly interspaced short palindromic repeats (CRISPR), were used to produce knockout mice. This new technology is useful because of high efficiency and ability to generate biallelic mutation in founder mice. Until now, most of knockout mice produced using engineered nucleases were C57BL/6 strain. In the present study we used CRISPR-Cas9 system to generate knockout mice in FVB strain. We designed and synthesized single guide RNA (sgRNA) of CRISPR system for targeting gene, Abtb2. Mouse zygote were obtained from superovulated FVB female mice at 8-10 weeks of age. The sgRNA was injected into pronuclear of the mouse zygote with recombinant Cas9 protein. The microinjected zygotes were cultured for an additional day and only cleaved embryos were selected. The selected embryos were surgically transferred to oviduct of surrogate mother and offsprings were obtained. Genomic DNA were isolated from the offsprings and the target sequence was amplified using PCR. In T7E1 assay, 46.7% among the offsprings were founded as mutants. The PCR products were purified and sequences were analyzed. Most of the mutations were founded as deletion of few sequences at the target site, however, not identical among the each offspring. In conclusion, we found that CRISPR system is very efficient to generate knockout mice in FVB strain.
        4,000원
        7.
        2012.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The aim of this study was to investigate the correlation among bone mineral density(BMD), body composition and body circumference on 20's college women in Hwaseong. A total of 86 subjects were measured with BMD and body composition and body circumference. To evaluate the correlation between BMD and body composition, bone density and body weight, body mass index(BMI), lean body mass, muscle mass, fat mass and body fat mass were compared. The results of this study, weight was considered the strong correlation with BMD than the height and BMI seems to be greater significance rather than the lumbar spine and femur BMD. In addition, the relationship between body composition and BMD, lean body mass, muscle mass, body fat mass were the most relevant factors and BMD. The relationship between BMD and body circumference that have been difficult because of not enough previous studies but somewhat the study showed that association.
        4,000원
        8.
        2011.12 구독 인증기관 무료, 개인회원 유료
        The objective of this study was to determine the effect of macrophages on growth of human colon cancer cells. The results showed that co-culture of colon cancer cells with macrophages inhibited the growth of colon cancer cells (HCT116 and SW620) depending on the number of macrophages, RAW 264.7 cells, and activated THP-1 cells accompanied by down regulation of pSTAT3 in cancer cells. We also found that expression and release of cancer cell growth inhibitory cytokines, IL-1 receptor antagonist (IL-1ra) and IL-10, was increased in macrophages. Blocking of the STAT3 pathway with specific inhibitor and siRNA of STAT3 abolished the growth of colon cancer cells and expression of IL-1ra and IL-10. In addition, neutralization of IL-1ra and IL-10 with antibodies resulted in reversal of macrophage-induced inhibition of cancer cell growth. These data showed that IL-1ra and IL-10 released from macrophages inhibit growth of colon cancer cells through inhibition of the STAT3 pathway.
        4,500원
        9.
        2009.09 구독 인증기관 무료, 개인회원 유료
        Effects of Vegemil® containing soybean proteins and isoflavones on the growth and bone density of broiler chickens were investigated. One-week-old male and female Arbor Acres broiler chickens were fed on Vegemil® A containing 3% soybean proteins and 162 ppm isoflavones, instead of water, for 30 days and their growth indices (body weight, leg weight and femur length) and bone density were analyzed. The body weight gains in male and female chickens were increased by 15.6% and 31.7%, respectively, following feeding Vegemil® A compared to normal water. Vegemil® A increased leg weight as well as femur length of females by 22.9% and 15.0%, respectively. In addition, Vegemil® A feeding enhanced femoral bone density by 21.3% in comparison with water feeding. Therefore, it is suggested that Vegemil® A not only facilitates body growth, but also strengthens bone density of normal chickens, and that it could be a promising candidate for the improvement of infant growth and for the prevention of menopausal osteoporosis.
        4,000원
        10.
        2017.05 서비스 종료(열람 제한)
        Background : Corrosion is one of the most devastating problems faced by most industries. Mild steel has played a vital role in various fields due to the excellent mechanical properties of mild steel such as low density, high strength-to-weight ratios, good environmental stability, high thermal conductivity, and corrosion resistance. Methods and Results : The total phenolic contents (TPC) and total flavonoid contents (TFC) of the methanolic extract of C. grandiflora and R. verniciflua leaf have been examined, and its corrosion inhibition performance was investigated by weight loss and electrochemical impedance spectroscopy (EIS) and polarization measurements. The surface morphology of mild steel was analyzed by scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDX) and by atomic force microscopy (AFM). The percentage composition of polyphenolic compounds was found to be higher in C. grandiflora and R. verniciflua plant extracts, and it was proved to be a superior, eco-friendly, and anti-corrosive inhibitor for mild steel in 1M of H2SO4. The Tafel polarization studies indicate that the plant extract is a mixed-type inhibitor. Scanning electron microscopy/energy -dispersive X-ray spectroscopy (SEM-EDS), and atomic force microscopy (AFM) studies confirmed the formation of a protective film on the metal surface. The corrosion inhibition of the C. grandiflora and R. verniciflua plant extracts was characterized by Fourier transform infrared (FT-IR), UV-visible spectra, and wide-angle X-ray diffraction (XRD) studies; these show the strong interaction between the metal surface and the inhibitor. Conclusion : The methanolic extract was prepared the two different plants like C. grandiflora, and R. verniciflua was studied the corrosion inhibition on the mild steel specimen in acidic medium through various methods involving weight loss measurements, EIS, and potentiodynamic polarization. The results shows that the C. grandiflora, and R. verniciflua plant extracts illustrate an effective corrosion inhibitor for mild steel with good anticorrosion properties in acidic environmen
        11.
        2016.10 서비스 종료(열람 제한)
        Background : Despite the presence of various bioactive compounds in ginseng, there is lack of study on the variations of bioactive compounds in ginseng according to the cultivation of soil and the applied fertilizer types (or amount). Therefore, this study aims to examine the variations of 37 fatty acids (FA) and 8 vitamin E (Vit-E) vitamers in 6-year-old ginseng root cultivated in different soil types with different fertilizers regimes. Methods and Results : The profiling of 37 FAs and 8 Vit-E vitamers in 6-year-old ginseng roots was measured by gas chromatography coupled with a flame ionization detector, and then these results were statistically analyzed with chemometrics. The FA and Vit-E content in ginseng roots varied significantly with respect to soil cultivation conditions due to organic fertilizer types and amounts used. Unsaturated FA in ginseng is approximately 2.7 fold higher than the saturated FA. Linoleic, palmitic, and oleic acids were the most abundant FAs found in the ginseng roots. Also, the major Vit-E vitamer found in ginseng root is α -tocopherol. In particular, the application of rice straw compost or food waste fertilizer was increased to create nutritionally-desirable FAs and bioactive Vit-E in ginseng root. In addition, phytonutrient profiling coupled with chemometrics can be used to discriminate the cultivation conditions of ginseng. Conclusion : This preliminary study extends our understanding about the variations of FA and Vit-E in ginseng root depending on cultivation conditions. Hence, these results can be useful as basic information for reliable ginseng production containing high amounts of phytonutrients in a paddy-converted field.
        12.
        2016.10 서비스 종료(열람 제한)
        Background : Garlic is one of the important vegetables and a source of natural anti-oxidants. This study was carried out to investigate the antioxidant activities including 2,2-diphenyl-1-picr yl-hydrazil (DPPH), 2,2'-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS), ferric reducing antioxidant power (FRAP), reducing power (RP) and total polyphenol content (TPC) of A. ampel oprasum L. Methods and Results : DPPH, ABTS, FRAP, TPC, and RP were analyzed the extract of aerial plant part in 22 accessions of A. ampeloprasum by spectrophotometry mathod. A. tuberosum Rottler ex Spreng. was used as a control. DPPH was ranged from 0.35 to 3.06 ㎍ ASC ㎎-1 dw. ABTS and FRAP showed wide variation from 4.37 to 29.30 ㎍ Trolox ㎎-1 dw and 3.18 to 10.8 ㎍ ASC ㎎-1 dw, respectively. RP and TPC were ranged from 3.43 to 9.51 ㎍ GAE ㎎-1 dw, and 0.8 to 18.63 ㎍ ASC ㎎-1 dw, respectively. Cluster analysis of A. ampeloprasum germplasm was divided into two major groups. Group Ⅰ (7 accessions) characterized as higher antioxidant activities than the group Ⅱ (15 accessions) and had similar antioxidant activities with A. tuberosum as a control. FRAP value showed a significant strong positive correlation with DPPH (r = 0.868*) and ABTS activity (r = 0.826*). Principal component analysis showed that the first two principal components (PC1 and PC2) cumulatively explained 85.64 % of total variation. Conclusion : From the above results, we may suggest that A. ampeloprasum aerial parts might have useful as a new material for functional food.
        14.
        2009.12 KCI 등재 서비스 종료(열람 제한)
        Cowpea might have been introduced from China to Korea and cultivated for several hundred years but it has never been a staple food crop in Korea. In this study, genetic diversity of 492 Korean cowpea landrace accessions that have passport information was estimated using six SSR markers. The mean of Weir's gene diversity was 0.665 from all accessions investigated in the study. Cowpea gene diversity of six local provinces in Korea was ranged from 0.370 in accessions of Gangwon to 0.680 in Jeonra provinces. Low gene diversity of the cowpea genepool of Gangwon province was probably derived from relatively few introductions. Especially SSR markers VM36 and VM39 seem to be good markers to distinguish the Gangwon accessions from others by occurring at a specific locus with higher than 78% of allele frequency. Except for the Gangwon province with the low genetic diversity, gene diversity of cowpea accessions from other provinces was ranged from 0.600 to 0.680 indicating no big differences among provinces. Distribution pattern of the allele frequencies was similar among the other provinces. This may reveal that Korean farmers might exchange cowpea seeds easily with even their neighbors with geographical barriers. A core collection, 100 landraces, ca. 20% of base collection, was developed at the 70% of a similarity coefficient level using random sampling approaches after stratification of the entire landrace collection based on the phenetic dendrogram. The variability of SSR in the base and core collections of Korean cowpea landrace was compared by calculating Weir's gene diversity. The mean of Weir's gene diversity of the core was 0.707 while that of the base collection was 0.665. The higher diversity index in the core collection indicates that it maintains the initial variability and well represents the base collection. The core collection included one of determinate accession (IT 216155) and two of no branching type accessions (IT 103959 and IT 161024). The core collection could be used to guide more efficient management and utilization of the entire collection. This core collection should be revised periodically as additional accessions are collected and further characterization is conducted.