결과 내 재검색





        검색결과 8

        2024.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Heavy metal ions pollution has become of worldwide critical concern, thus, it is particularly important to monitor it in the environment and food for ensuring human health. In this study, p-phenylenediamine and 2-mercaptothiazoline were used to prepare nitrogen (N) and sulfur (S) co-doped carbon dots (N/SCDs) for fluorescent and colorimetric detection of Cu2+. The fabricated N/SCDs with bright green fluorescence showed excellent optical characteristics and favorable water solubility. In an aqueous system, a significant fluorescence quenching of N/SCDs at 512 nm is obtained in the presence of Cu2+. It also caused a significant colorimetric response with the color of prepared N/SCDs solution changed from colorless to yellow. Under optimal conditions, the analytical results showed that the linear range spanning from 5 to 400 μM, with a detection limit of 0.215 μM in fluorescence and 0.225 μM in colorimetric detection. In addition, N/SCDs displayed high selectivity toward Cu2+. No obvious interference was observed over other metal ions. Furthermore, we have also used N/SCDs to monitor Cu2+ in tap and lake water. The recovery of Cu2+ ranged between 89.6% and 113.1%. Exhibiting remarkable sensitivity and selectivity, the designed sensor offers a promising detection method for Cu2+ detection in the real sample.
        2024.05 KCI 등재 구독 인증기관 무료, 개인회원 유료
        With the increasing value of data and the growing power in the field of digital economy, China has taken the governance of cross-border data flow(CBDF) as an important national strategy. At the domestic policy level, China has piloted Beijing, Shanghai, Hainan and Xiongan New Area to create international data centers with the intention to control inbound and outbound data resources. At the domestic legislative level, China insists that the outbound data transfers be conducted in a secure environment. At the international cooperation level, on the basis of the Global Data Security Initiative, China builds the consensus of countries and promotes cooperation among countries along the Belt and Road routes on CBDF through the Digital Silk Road. Simultaneously, China will engage proactively in the newly international economic and trade agreements, with RCEP standing as a prime example. China’s discourse and model on CBDF governance have been continuously enhanced.
        2024.04 구독 인증기관·개인회원 무료
        Bacillus thuringiensis (Bt) is widely used as an environmentally friendly insecticide compared to chemical insecticides. However, challenges such as difficulty in direct practical application, limited efficacy duration, and stability have been identified. To solve these issues, formulation-based research is being extensively conducted. In this study, the high insecticidal activity strain Bt IMBL-B9, identified in previous research, was subjected to large-scale cultivation using a fermentor. Subsequently, various formulations were developed through formulation processes. and characteristics such as their wettability, suspensibility and particle size were assessed to select the optimized formulation.
        2022.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The hybridization of graphene with magnetic nanoparticles has endowed graphene with increasing interest as the adsorbent for wastewater treatment. However, its fabrication often involves a multi-stepped chemical synthesis process. In this work, we demonstrate a facile, one-step, and solvent-free approach to fabricate Fe3O4 nanoparticle-anchored Laser-Induced Graphene ( Fe3O4@LIG) as an efficient adsorbent by direct laser irradiation on a ferric acetylacetonate containing polybenzoxazine film. Raman and X-ray diffraction analysis confirm the graphene component in the adsorbent, and the morphology characterizations show that Fe3O4 nanoparticles are distributed uniformly on LIG with hierarchical meso- and macro-porous structures. Adsorption experiments indicate that Fe3O4@ LIG can adsorb methylene blue (MB) from aqueous solutions in a fast and effective manner, with a maximum adsorption capacity up to 350.9 mg/g. The adsorption kinetics and isotherms are also investigated, which are well-described by the pseudo-second-order model and Langmuir model, respectively. Additionally, Fe3O4@ LIG is also demonstrated with the efficient removal of a variety of organic solvents from water. The favorable adsorption behavior of Fe3O4@ LIG is attributed to its unique porous structure and the molecular interactions with adsorbates. On the other hand, Fe3O4@ LIG has high magnetic property, and therefore, it could be easily recovered from water and well regenerated for repeated use. With the efficient adsorption of organic pollutants, magnetic separability, and good
        2021.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        진정한 의미에서의 민간예술작품에서 구현하는 것은 겉면에 표출된 화려한 표상할 뿐만 아니라 그 내면을 탐구하는 것, 더욱 이런 예술 풍격을 단조해 낸 불굴의 민족의식과 정감이다. 예로부터 사회의 발전과 계급 분화로 원시 예술의 변천을 거쳐 분리되어 형성된 문인예술, 궁정예술, 종교예술, 민간예술에 이르기까지 이러한 다른 관념을 기반으로 한 예술 문화 종류가 역사의 흐름 속에서 갈등하고 또 끊임없이 서로 연계하며 기반으로 하고 모순, 연계와 융합에서 하나의 완전한 민족 문화를 육성하였다. 오늘에 이르기까지 민간예술문화에서의 순수한 예술 신념은 여전히 줄곧 이른바 고상하고 우아한 예술 문화에 대해 확고한 기초적 역할을 하고있다. 수암만족 민간 전지(剪紙)는 동북 백산흑수사이에 만족 노동 인민이 창조한 역사적 예술 문화의 완벽한 결정체일 뿐만아니라 또한 수암의 전통적 만족 민간 예술 특유한 민족 예술문화 표식이고 동북 지역의 만족 의향 및 옥도 특색의 전통 민간예술의 걸출한 대표이다. 이것은 동북 만족 인민의 지혜의 예술을 포함하고 있으며 중요한 역사적 가치와 문화적 가치가 있을 뿐만 아니라 또한 중요한 예술적 가치와 과학적 가치를 지니고 있으며 전통문화의 결정체이자 화하문명의 보물이다. 지금은 어떤 의미에서 이미 문화브랜드로 된 민간 전지예술이 점차 문화의 수요품으로 되고 있다. 특유의 가치와 방식으로 문화가 널리 전파되는 또 다른 경로로 되고 있다. 그러나 북방 만족 전지를 놓고 말할 때 기나긴 과정에서 아주 많은 문제도 나타났다. 이를테면 제작 형식과 예술 풍격의 혼동, 관련 문화자료내용의 귀납 정리와 발전 전승 등이다. 본 논문은 북방 만족 문화의 대표 특징을 지닌 수암만족 전지를 연구 대상으로 지역 역사, 문화 신앙 등등 방면에 대해 중국 북방 만족 종이 오림이 형성된 근원성 원인을 심도 있게 분석하였다. 이와 동시에 종이 오림 작품이 드러낸 예술 상태에 있어서 다른 지역의 동류 작품들과 전체적 및 개별적 비교를 하여 예술풍격상의 지역문화 차이를 분명히했다. 또 현재를 결부시켜 전지 예술이 사람들에게 대한 의의를 서술하고 전통문화를 발전시키고 전승할 것을 호소했다.
        2016.07 구독 인증기관 무료, 개인회원 유료
        This study (i) examines the main effect of how a customer’s trust in the service personnel could affect his/her service co-designing and co-delivering behavior; and (ii) investigates how the main effect could vary by the customer’s trust in the service brand, and the types of customer contact service contexts. Keywords: customer participation, co-