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        검색결과 2,353

        64.
        2023.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Iron (Fe) is a vital element for plants and other organisms, involving in several physiological processes including respiration, chlorophyll biosynthesis, and photosynthesis. Unfortunately, how Fe accumulation regulates in response to light quality has not been well established in plants. Therefore, the aim of the study was to explore the mechanism of Fe homeostasis by light quality. In this study, we found morpho-physiological attributes were significantly improved in response to blue (λmax: 450) compared to white (λ max: 500) and red (λmax: 660) light. The root-shoot length, plant biomass, photosynthesis efficiency (Fv/Fm) and leafgreen (SPAD) significantly declined in response to white and red light. However, these parameters were improved and iron deficiency was substantially alleviated by blue light exposure in alfalfa seedlings. This study might be useful to the forage breeders and farmers for improving alfalfa yield and nutritional benefits.
        4,000원
        65.
        2023.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Silicon (Si) has the potential to improve plant growth and stress tolerance. The study aimed to explore Si-involving plant responses and molecular characterization of different Si-responsive genes in alfalfa. In this study, the exogenous supplementation of Si enhanced plant growth, and biomass yield. Si-acquisition in alfalfa root and shoot was higher in Si-supplemented compared to silicon deficient (-Si) plants, implying Si-acquisition has beneficial on alfalfa plants. As a consequence, the quantum efficiency of photosystem II (Fv/Fm) was significantly increased in silicon-sufficient (+Si) plants. The quantitative gene expression analysis exhibited a significant upregulation of the Lsi1, Lsi2, Lsi3, NIP5;1, and NIP6;1 genes in alfalfa roots, while BOR1, BOR4, NIP2, and NIP3 showed no significant variation in their expression. The MEME results further noticed the association of four motifs related to the major intrinsic protein (MIP). The interaction analysis revealed that NIP5;1 and Lsi1 showed a shared gene network with NIP2, BOR1, and BOR4, and Lsi2, Lsi3 and NIP3-1, respectively. These results suggest that members of the major intrinsic proteins (MIPs) family especially Lsi1, Lsi2, Lsi3, NIP5;1, and NIP6;1 genes helped to pass water and other neutral solutes through the cell membrane and those played significant roles in Si uptake and transport in plants. Together, these insights might be useful for alfalfa breeding and genome editing approaches for alfalfa improvement.
        4,000원
        66.
        2023.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The disposal of organic pollutants is one of the important research topics. Some of the studies in this field are based on the degradation of organic pollutants with a catalytic agent. The cobalt tetraoxide/peroxymonosulfate system is an important catalytic system used for the radical degradation of organic pollutants. To increase the catalytic efficiency of such reactions, graphitization of activated carbon used as a support solid and nitrogen doping to the carbon structure are commonly used methods. In this study, cobalt tetraoxide production, N-doping and graphitization were carried out in a single step by heat treatment of activated carbon doped with the phthlocyanine cobalt (II) complex. The catalytic performance of the catalyst/ peroxymonosulfate system was investigated by changing the pH, catalyst, and PMS concentration parameters on rhodamine B and 1,3,5 trichlorophenol, which were used as models. It was seen that the catalysts had 97% activity on rhodamine B in 16 min and 100% on 1,3,5 trichlorophenol in 6 min. It was observed that the catalysts continued to show high catalytic activity for five cycles in reusability studies and had a very low cobalt leaching rate. These results are in good agreement with previously published studies. In line with these results, the synthesized N-doped graphitic carbon/Co3O4 catalyst can be used as an effective catalyst for wastewater treatments.
        4,900원
        67.
        2023.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The emergence of Mo2C- based catalysts in recent years has been favored as promising contender within diverse class MXenes. In terms of rapid development in the photocatalytic application, these intriguing compounds exhibit excellent photocatalytic performance because of their superior optical properties and peculiar structure characteristics. Unfortunately, a systematic review of Mo2C- based catalysts is lacking. In this review, we abstract the implication of structure—property relationship of emerging Mo2C- based MXenes materials and their applications toward the photocatalytic hydrogen evolution reaction (HER). Furthermore, synthetic pathways to prepare high-quality, low cost Mo2C- based MXenes materials and their outcomes for high HER applications are systematically described. Finally, several insights are provided into the prospects and future challenges for the development of highly reactive Mo2C- based MXenes materials, which present large range opportunities in this promising 2D materials for green and clean energy in environmental fields. This review provides a comprehensive scientific guide to the preparation, modification, and photocatalytic HER of MXenes-based materials.
        4,600원
        68.
        2023.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Decabromodiphenyl ether (BDE209) is a persistent aromatic compound widely associated with environmental pollutants. Given its persistence and possible bioaccumulation, exploring a feasible technique to eradicate BDE209 efficiently is critical for today’s environmentally sustainable societies. Herein, an advanced nanocomposite is elaborately constructed, in which a large number of titanium dioxide ( TiO2) nanoparticles are anchored uniformly on two-dimensional graphene oxide (GO) nanosheets ( TiO2/GO) via a modified Hummer’s method and subsequent solvothermal treatment to achieve efficient photocatalytic degradation BDE209. The obtained TiO2/ GO photocatalyst has excellent photocatalytic due to the intense coupling between conductive GO nanosheets and TiO2 nanoparticles. Under the optimal photocatalytic degradation test conditions, the degradation efficiency of BDE209 is more than 90%. In addition, this study also provides an efficient route for designing highly active catalytic materials.
        4,000원
        69.
        2023.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Reliable, inexpensive, environment-friendly, and durable properties of carbon materials with unique and outstanding photoelectric performance is highly desired for myriad of applications such as catalysis and energy storage. Since lattice modulation is a vital method of surface modification of materials, which form by an external force during the synthesis process, causing the internal compression and stretching, leading to lattice sliding event. In this review, we present a summary of different methods to tailor the lattice modulation in 2D carbon-based materials, including grain/twin boundary, lattice strain, lattice distortion, and lattice defects. This overview highlights the implication control of the diverse morphologies of nanocrystals and how to tailor the materials properties without adding any polymers. The improvement in the performance of 2D carbon materials ranges from the enhancement of charge transport and conductivity, structural stability, high-performance of light absorption capacity, and efficient selectivity promote the future prospect of 2D carbon materials broaden their applications in terms of energy conversion and storage. Finally, some perspectives are proposed on the future developments and challenges on 2D carbon materials towards energy storage applications.
        4,200원
        70.
        2023.07 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        In this study, the synthesis of nitrobenzene was carried out using sulfated silica catalyst. The study delved into H2SO4/SiO2 as a solid acid catalyst and the effect of its weight variation, as well as the use of a microwave batch reactor in the synthesis of nitrobenzene. SiO2 was prepared using the sol-gel method from TEOS precursor. The formed gel was then refluxed with methanol and calcined at a temperature of 600 °C. SiO2 with a 200-mesh size was impregnated with 98 % H2SO4 by mixing for 1 h. The resulting 33 % (w/w) H2SO4/SiO2 catalyst was separated by centrifugation, dried, and calcined at 600 °C. The catalyst was then used as a solid acid catalyst in the synthesis of nitrobenzene. The weights of catalyst used were 0.5; 1; and 1.5 grams. The synthesis of nitrobenzene was carried out with a 1:3 ratio of benzene to nitric acid in a microwave batch reactor at 60 °C for 5 h. The resulting nitrobenzene liquid was analyzed using GC-MS to determine the selectivity of the catalyst. Likewise, the use of a microwave batch reactor was found to be appropriate and successful for the synthesis of nitrobenzene. The thermal energy produced by the microwave batch reactor was efficient enough to be used for the nitration reaction. Reactivity and selectivity tests demonstrated that 1 g of H2SO4/SiO2 could generate an average benzene conversion of 40.33 %.
        4,000원
        71.
        2023.07 구독 인증기관·개인회원 무료
        In recent years, the marketing literature has given considerable attention to the concept of online consumer misbehaviour. However, this increased interest has resulted in a significant accumulation of knowledge, leading to fragmentation and confusion in the field. This situation has serious implications for both researchers and practitioners, as it impedes the development of a coherent and unified understanding of the field. To address this issue, this paper presents a systematic review aimed at consolidating and organizing the available research on online consumer misbehaviour. The paper provides a conceptualization and operationalization of the concept of OCM. Additionally, the paper identifies and discusses the existing theories used in the field of OCM research.
        72.
        2023.07 구독 인증기관·개인회원 무료
        Compulsive buying is a problematic behavior that could lead to negative outcomes (e.g., debts and negative relationships with relatives). Due to the COVID-19 pandemic, people changed their shopping behavior and experienced various life events. This research aims at exploring the relationship between life events and compulsive buying in Indonesia. A qualitative approach using in-depth interviews was employed. Nineteen participants who faced changing course of life, either positive (e.g., give birth) or negative (e.g., sudden death of family), during the pandemic were interviewed. We found that positive life events cause people to feel over-excited and over-grateful and shop compulsively. Negative life events that result in self-doubt and lower self-esteem also lead to a compulsive behavior. The study contributes to the compulsive behavior literature by exploring the antecedent of compulsive buying from the live events perspective and provide implications for policy makers and marketers.
        73.
        2023.07 구독 인증기관·개인회원 무료
        In order to communicate brand concepts and values to the young generations, many brands are highly active on social media platforms such as Twitter, Facebook, and Instagram. Brand-Generated Content has already become the most common marketing strategy for fashion brands and plays a significant role in influencing consumers’ purchase intention. With increased competition on social media platforms, companies need to understand which posting features can bring in more consumer engagements such as number of likes and comments on social media platforms. In this paper, we develop (1) a model to predict the number of likes and (2) a methodology to detect anomaly of posts that have unusually high percentage of negative user comments based on Instagram design variables, including semantic text meanings, facial expressions, color scheme and background of photos, and post timing, among others. We collected a data set of brand-generated Instagram posts from ten fashion brands. The data covers the image, text, and user comments posted between 2019 and 2020. Image features were extracted using Convolutional Neural Network, and text topics were generated through Latent Dirichlet Allocation. Our results will help managers design Instagram posts to increase consumer engagement and to reduce negative consumer reactions.
        74.
        2023.07 구독 인증기관·개인회원 무료
        We investigate the incremental predictive power of three consumer dispositions – xenocentrism, cosmopolitanism and ethnocentrism – on domestic and foreign product purchase intentions, after taking the impact of consumer demographics and product category-specific variables into account. Using data from an online survey of 201 Turkish consumers, hierarchical regression analysis reveals that widely used demographic variables (namely, age, gender and education) do not significantly influence consumer intentions to buy either domestic or foreign clothing products. Of the consumer dispositions, xenocentrism exerts a significant negative effect on domestic product purchase intentions, cosmopolitanism has a positive effect on foreign product purchase intentions, while ethnocentrism shows no effect on either domestic or foreign product purchase intentions. Implications of the findings are considered and future research directions identified.
        75.
        2023.07 구독 인증기관·개인회원 무료
        Green consumption behavior (GCB) is desirable for a better world. The trend of GCB is expected to rise in the coming years. As such, it is imperative to understand the enablers of GCB. A significant majority of the investigated drivers of GCB are consumer-level factors. Studies focusing on the consumer-level showed that factors such as values, intentions, and personal norms could influence GCB. However, it is argued that compared to values or intentions, self-determined motivation can better predict GCB. The effect of self-determined motivation types (i.e., autonomous and controlled motivation) on GCB remains unclear due to prevailing gaps and contradictory findings. Furthermore, it is posited that people exhibit more self-determined behavior if they have strong self-awareness. Higher self-awareness can be achieved through mindfulness; therefore, differences in mindfulness level could affect the motivation-behavior relationship.
        76.
        2023.07 구독 인증기관·개인회원 무료
        Many retailers and food service providers offer programs as part of their loyalty programs in which customers are given stamps for each purchase of a qualifying product or service and redeemed for a reward once a certain number of stamps have been accumulated. We identify which stimuli in such goal-directed motivational promotions induce customers to participate in the program.
        77.
        2023.07 구독 인증기관·개인회원 무료
        The application of mindfulness is increasing significantly in different areas of business studies. However, identifying how mindfulness research has evolved and the major research themes, specifically within the business studies domain, remains lacking. This study unveils the intellectual structure of mindfulness research in business studies. Using citation and co-citation analysis, the study identifies the most influential articles, annual growth, and three key research clusters constituting the intellectual foundation.
        78.
        2023.07 구독 인증기관 무료, 개인회원 유료
        This study extends the previously classified typology of unplanned purchases to accommodate the increase in online purchases. We also measured the impact of unplanned purchases on shoppers from an emotional perspective. As a result, new types of unplanned purchases, such as "novelty," "recall," "salience," "reference price," "risk aversion," and "embodied cognition," were derived. Furthermore, among unplanned purchases, salience purchases were found to significantly increase shoppers' interest. This result indicate that the importance of marketing strategies that take salience into account for manufacturers and retailers.
        4,000원
        79.
        2023.07 구독 인증기관·개인회원 무료
        In the current study, we directly measure consumers’ physiological responses (i.e., brain waves via electroencephalogram [EEG]) to advertising stimuli (digital storyteller vs. human storyteller) to confirm the narrative transportation process of storytelling immersion.
        80.
        2023.07 구독 인증기관·개인회원 무료
        Commercial condom advertisements usually emphasize the sexual pleasure of branded products, which leads to controversial public views. Some people agree that commercial condom advertisements can also benefit public health, whereas others disapprove of such commercial condom advertisements because their contents are usually offensive, low-tasted, and pornographic. Despite controversy over commercial condom advertising, we know little about the spillover effect of commercial condom advertisement. On one hand, sexual-related content in the commercial condom advertisement may have an arousal effect. That is, it can evoke sexual arousal, leading to more sex intercourses. More frequent sex behaviors, especially casual sex behaviors, may then lead to a risk of contracting sexually transmitted diseases (STDs). On the other hand, commercial condom advertisements may have an educational effect. That is, it can persuade people to use condoms, helping people get in the habit of using condoms, thus reducing the STD trends. In the short term when condom commercials are aired, the arousal effect and educating effect coexists, which motivates the net short-term effect as an open empirical question. In the long-term when the condom commercial no longer aired, the educating effect remains, which decreases the STD trends.
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