Highly sensitive electrochemical detection of melatonin based on graphene-assisted molecular imprinting technology

Sun Bin,Sun Wei,Wang Zhigang,Zhao Bo,Yang Song 한국탄소학회 2024 Carbon Letters Vol.34 No.1

In this paper, a simple, cost-effective, and efficient electrochemical sensor for molecular imprinting melatonin was established. The molecular imprinted films were formed by in situ electrochemical polymerization using molecular imprinting technology. The modification method, modification time and other parameters of the electrode were optimized. Under optimized conditions, the sensor responds to melatonin concentration in a linear range of 0–100 μM. The detection limit was 0.171 μM. In addition, the sensor has little response to interfering substances, such as uric acid, vitamin B6, vitamin C, and glucose, and can be tested in real samples. The recoveries were 98.73–101.60%.

Magnetic Force Microscopy Study on the Ultrathin FePt Films

Zhigang Sun,Hyun-Seok Ko,Sung-Chul Shin 한국자기학회 2007 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-

Synthesis of acetic acid-[(hydrazinylthioxomethyl)thio]-sodium and its application on the flotation separation of molybdenite from galena

Zhigang Yin,Wei Sun,Yuehua Hu,Runqing Liu,Wei Jiang,Chenhu Zhang,Qingjun Guan,Chenyang Zhang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.52 No.-

A novel organic compound acetic acid-[(hydrazinylthioxomethyl)thio]-sodium was synthesized andcharacterized. Theflotation performance and adsorption mechanism of AHS to galena were investigatedby micro, benchflotation tests, UV spectra, zeta potential, FTIR and XPS measurements. The resultsdemonstrated that AHS exhibited superior depressing power to galena and could be used as selectivedepressant forflotation separation of molybdenite from galena. The results of UV spectra, FTIR, zetapotential and XPS measurements demonstrated that AHS chemisorb on galena surface by formingfivememberedcheat ring with releasing of H ions. Therefore, the possible adsorption mode of AHS on galenasurface was recommended.

Inorganic islands on a highly stretchable polyimide substrate

Sun, Jeong-Yun,Lu, Nanshu,Yoon, Juil,Oh, Kyu-Hwan,Suo, Zhigang,Vlassak, Joost J. Cambridge University Press (Materials Research Soc 2009 Journal of materials research Vol.24 No.11

<P>For a flexible electronic device integrating inorganic materials on a polymer substrate, the polymer can deform substantially, but the inorganic materials usually fracture at small strains. This paper describes an approach to make such a device highly stretchable. A polyimide substrate is first coated with a thin layer of an elastomer, on top of which SiN<I>x</I> islands are fabricated. When the substrate is stretched to a large strain, the SiN<I>x</I> islands remain intact. Calculations confirm that the elastomer reduces the strain in the SiN<I>x</I> islands by orders of magnitude.</P>

Observation of Valley Landau-Zener-Bloch Oscillations and Pseudospin Imbalance in Photonic Graphene

Sun, Yong,Leykam, Daniel,Nenni, Stephen,Song, Daohong,Chen, Hong,Chong, Y. D.,Chen, Zhigang American Physical Society 2018 Physical Review Letters Vol.121 No.3

Debonding and fracture of ceramic islands on polymer substrates

Sun, Jeong-Yun,Lu, Nanshu,Yoon, Juil,Oh, Kyu-Hwan,Suo, Zhigang,Vlassak, Joost J. American Institute of Physics 2012 JOURNAL OF APPLIED PHYSICS - Vol.111 No.1

Analysis of Microbial Diversity in Tomato Paste Wastewater through PCR-DGGE

Shiyang Sun,Zhiguo Guo,Ruili Yang,Zhigang Sheng,Peng Cao 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.1

This study was conducted to evaluate the relationship between the flora and the changes in the microbial communities during tomato paste wastewater treatment. The bio-analytical techniques like Polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE), adenosine-triphosphate (ATP) analysis, and testing of mixed liquid and suspended solids (MLSS) were simultaneously conducted to analyze the dynamics of the microbial communities during tomato paste wastewater treatment process. The study suggests that the combined approaches of PCR-DGGE, ATP, and MLSS provided a simple and accurate method to evaluate the changes in microbial activity, microbial structure, and population size with the shift in contaminants in different treatment processes. The study also demonstrates that the structure and quantity of a microbial community are influenced by MLSS during the wastewater treatment process, which consequently determines the overall functionality of the system.

Bearing Fault Diagnosis Based on Wavelet Packet Decomposition Energy Distribution and Gray Similar Correlation Degree

Zhang Zhigang,Qin Hongmao,Sun Ning 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.2

For rolling bearing fault, there is a certain mapping relationship between failure state and its each frequency band energy and distribution, this paper proposes a bearing fault diagnosis method based on wavelet packet decompotion energy distribution and gray similar correlation degree. Introducing a concept of soft morphological filtering, combined the EMD method on the original vibration signal de-noising pretreatment. Decomposing bearing vibration acceleration signal after noise reduction into different frequency band signal by adopting the method of wavelet packet decomposition and calculating the energy distribution. Due to the gray similar correlation degree analysis for the classification of the small sample pattern recognition has a good effect, element structure characteristic vector by energy distribution, to judge the fault types by calculating the bearing vibration signal under different status similar correlation degree. Experimental results show that, the proposed can be effectively applied to bearing fault diagnosis.

다화(茶畫)에 나타난 중국 당, 송 대의 차 문화 융합 생활방식에서의 차 가구 특성 비교

웨이쯔강(Wei, ZhiGang),정미선(Chung Mi Sun) 한국전시산업융합연구원 2020 한국과학예술융합학회 Vol.38 No.4

본 연구는 중국 당대와 송대의 고대 차 문화 생활방식의 차 가구 특성에서 시작되었다. 본 연구의 목적은 중국 인물에 관련한 도면을 연구하는 것이며, 당대의 궁락도 (宮樂圖), 춘연도(春宴圖), 죽차도(煮茶圖), 소익증란정도(蕭翼贈蘭亭圖), 조금차명도 (調琴啜茗圖)와 송대의 위로박고도(圍爐博古圖), 낸차도 (攆茶圖), 라한도(羅漢圖), 회창구로도(會昌九老圖), 착색인물도(著色人物圖)의 차문화 생활방식을 분석을 하는 것이다. 따라서 본 논문의 연구방법은 문헌 조사법과 영상데이터 분석법을 사용하였다. 이중 문헌조사법은 당대와 송대의 시대성, 사회성, 경제성과 차 문화의 생활방식, 차 가구의 특성을 연구하고, 연구기준을 도출하고, 이미지 데이터 분석법 및 연구기준을 적용한다. 차 문화 생활속에 나타난 사용자를 중심으로 연구된 당대와 송대 차에 관한 그림 10장을 분석했으며 차 문화 생활방식의 6가지 기준을 도출하였다. 그 기준은 바로 사용자, 차의 모양, 차 마시는 방식, 차의 형태, 차의 공간, 차의 가구 등 6가지이다. 기준에 따라 당대와 송대의 다화(茶畵)의 내용을 분석하여 요약해낸 결과 및 차의 문화 생활방식에 있어서 차 가구의 융합적인 공동성을 표현한 가구종류는 침구, 좌구, 도구 및 선반이다. 차의 기능, 구조, 형식과 사용자의 특성을 정리한다. 그의 결과가 바로 당대와 송대의 독특한 매력을 가져있으며, 현대 차 가구 디자인에도 혁신적인 아이디어와 계시를 제공하였다. 연구결과 및 내용은 다음과 같다. 차 가구 디자인은 혁신에 있어서 두 가지 변화가 필요하다. 하나는 당, 송 차 문화의 생활방식 중 차 가구의 특성을 근거로 당대의 과학기술 혁신에 맞추어 설계하여 전통 속에서 변화를 추구한다. 둘째는 당대의 과학기술을 접목해 혁신적 디자인을 하고, 전통 밖에서 새로운 것을 찾는 것이다. This study deals with the characteristics of the ancient style of tea furniture from the Tang and Song dynasties. The purpose of this study is to analyze the lifestyle of tea culture in the Tang Dynasty’s “Gongyue”, “Spring Banquet”, “Tea Cooking”, “Xiao Wing Gift Pavilion”, “Zipping the Plum and Sipping the Name” and Song Dynasty’s “Bogu Tu”, “Rohan Tu”, “Haichang Guro Tu”, and “Color Painting”. In this paper, the paper studies the content of tea ware between the literature investigation and the image data analysis method, and concludes that the tea culture of the Tang Dynasty and Song Dynasty was based on the tea culture of the Tang Dynasty and Song Dynasty, and the tea culture of the Song Dynasty. Summarize the function, structure, form and user characteristics of tea ware.In conclusion, the unique charm of tea ware in Tang and Song dynasties was displayed, and it also provided new ideas and inspiration for the design of modern tea ware design.The design of tea furniture requires innovation andinnovation. One is the design of tea furniture based onthe characteristics of the Tang and Song dynasties teaculture, and the other is the design of tea furniture in the Tang and Song dynasties tea culture.

중국 고대 연회주 문화의 주구특성 융합연구 - 오대와 송대의 ‘인물화’를 대상으로 -

웨이쯔강(Wei, ZhiGang),정미선(Chung Mi Sun) 한국전시산업융합연구원 2020 한국과학예술융합학회 Vol.38 No.3

본 연구에서는 중국의 특색 있는 두 개의 왕조 오대(五代)와 송나라(宋代)를 선택했다. 본 연구의 목적은 중국 오대(五代)부터 송나라(宋代)까지의 연회주문화에 대한 술 도구의 특성 연구를 통해 연회주 문화의 ‘예’ 제 문화와 술 도구의 특성을 찾아 당대(当代) 연회주 문화에서 술 도구의 융합과 혁신의 길을 찾는 것이다. 연구 방법은 문헌조사법과 그래픽 데이터 분석법이 있다. 문헌조사법을 응용하여 오대(五代)와 송나라(宋代)의 시대성, 사회성과 경제성, 연회주문화와 술 도구의 특성을 각각 연구하였으며 그래픽 데이터 분석법을 응용하여 오대(五代) 고굉중(顾闳中)의 <한희재야연도>(韩熙载夜宴图) 제1단과 송나라(宋代) 조길(赵佶)의 <문회도>(文会图)를 연구하고 연회사용자를 중심으로 유가의 ‘예’ 제 문화를 결합해 ‘인물화’에서 사용자의 신분, 성별, 형태, 술 도구와 공간을 각각 그래픽 데이터로 분석해 데이터를 도출하고 고대 연회주 문화의 특성에 대한 데이터를 요약한다. 결론은 두 가지가 있다. 첫째, 연회주 문화에서 술 두구의 등급은 사용자의 사회 계급 등급에 따라 구분되며 ‘대잔(台盏)’과 ‘반잔(盘盏)’의 순이다. 둘째, 중국전통 유가 문화의 ‘예’ 제를 엄격하게 전승하여 연회에서 사용자의 좌석은 등급에 따라 주인, 귀빈 및 부차적인 하객 순으로 ‘사주문화’ 를 전승하였다. 결론에 의하면 술 도구의 융합 혁신에는 세 가지가 있다. 첫째, 연회주 문화의 술 도구에 잠재되어 있는 ‘예’ 제문화의 내포이다. 둘째, 시대의 술 도구 문화와 민족적 특색을 보여주는 것이다. 셋째, 신소재, 신공예, 새로운 생활 방식을 응용한다. This study chooses the Five Dynasties and the Song Dynasty with Chinese characteristics. The purpose of this study is to find out the "ritual" culture and wine set characteristics of banquet wine culture and to find out the way of integrating and innovating wine set in the contemporary banquet wine culture through the study of the wine set characteristics of the banquet wine culture from the five dynasties to the Song Dynasty. The research methods include literature survey and image data analysis. The literature survey method is used to study the characteristics of the Five Dynasties and Song Dynasty, including the time, society, economy, banquet wine culture and wine set characteristics. The application of image data analysis has been used to study the first paragraph of the Five Dynasties Gu Hong’s Han Xizai Evening Banquet and the Song Dynasty Zhao Ji’s Wen Hui Picture. Taking banquet users as the center and combining with the Confucian "ritual" culture, the analysis and demonstration of image data are carried out on the identity, gender, form, drinking equipment and space of the users in the "figure painting" respectively, to obtain data and summarize the data on the characteristics of ancient banquet wine culture. There are two conclusions: (1) The ranking of wine set in the banquet wine culture is classified according to the social class of the users, which is respectively "table cup" and "dish cup"; (2) The "ritual" system of traditional Chinese Confucian culture is strictly inherited. In the banquet, users are seated according to the hierarchy of hosts, distinguished guests and secondary guests, and the "wine giving culture" is inherited. According to the conclusions, there are three innovations in wine culture: (1) The connotation of "ritual" culture hidden in the wine culture of banquet; (2) The display on the wine set culture and ethnic characteristics of the era; (3) The application of new materials, the new technology and the new way of life.