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Bin Yang,Xuan Liu,Dike Teng,Yanxiang Gao 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.4
Response surface methodology (RSM) was used for the optimization of antioxidant capacity in gardenia extracts. The antioxidant capacities of gardenia fruit extracts were investigated by ferric reducing ability (FRA) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging activity (RSA) assays. The optimum extraction parameters for the strongest antioxidant capacity were the ethanol concentration (EtOH) of 48.9%, extraction temperature of 72.9℃, and extraction time of 29.9 min. Analysis of variance (ANOVA) showed that the quadratics of EtOH and extraction temperature had highly significant effect on the antioxidant capacity (p<0.001). The antioxidant capacity was correlated with contents of bioactive components [crocin, geniposide, and total phenolic (TP) compounds] in gardenia extracts and mainly attributed to the content of the TP compounds.
Hai-bin Wei,Bing-yi Guo,Yao-fen Tu,Xuan-han Hu,Wei Zheng,Da-hong Zhang,Jian Zhuo 대한비뇨의학회 2022 Investigative and Clinical Urology Vol.63 No.3
Purpose: The selection of open prostatectomy (OP) over transurethral laser surgery is controversial for large volume prostates. Thus, we aim to compare the efficacy and safety of transurethral laser versus OP, and provide the latest evidence of clinical practice for large-sized benign prostatic hyperplasia (BPH). Materials and Methods: This meta-analysis used Review Manager V5.3 software and the systematic literature search of Cochrane Library, Embase, PubMed, and Web of Science datasets was performed for citations published from 2000 to 2020 that compared transurethral laser with OP for the treatment of large BPH. Variables of interest assessing the two techniques included clinical characteristics, and the perioperation-, effectiveness-, and complication-related outcomes. Results: The meta-analysis included twelve studies containing 1,514 patients, with 792 laser and 722 OP. The transurethral laser group was associated with shorter hospital stay and catheterization duration, and less hemoglobin decreased in the perioperative variables. There was no significant difference in the international prostate symptom score, post-void residual urine volume, maximum flow rate, and quality of life score. Transurethral laser group had a significantly lower incidence of blood transfusion than OP group (odds ratio, 0.10; 95% confidence interval, 0.05 to 0.19; p<0.001; I2=8%), and no statistical differences were found with respect to the other complications. Conclusions: Both OP and transurethral laser prostatectomy are effective and safe treatments for large prostate adenomas. With these advantages of less blood loss and transfusion, and shorter catheterization time and hospital stay, laser may be a better choice for large BPH.
Gao, Xuan-Wen,Yang, Junghoon,Song, Kyeongse,Luo, Wen-Bin,Dou, Shi-Xue,Kang, Yong-Mook The Royal Society of Chemistry 2018 Journal of Materials Chemistry A Vol.6 No.46
<P>FeCo alloy nanoparticles were nucleated onto graphitic carbon layers through the pyrolysis of polydopamine (PDA) sub-micrometer spheres to form a highly active electrocatalytic system that exhibits excellent oxygen conversion catalytic activity in both alkaline and acidic media. Owing to the strong metal chelation capability during the chemical modification and high sp<SUP>2</SUP>-dominant carbon yield of PDA, an abundance of non-precious-metal ions were easily trapped and absorbed into the PDA segments at room temperature by catechol and amine functional groups, followed by the <I>in situ</I> nucleation of FeCo alloy nanoparticles on graphitic carbon layers during the pyrolysis. The contents of graphitic nitrogen and pyridinic nitrogen were significantly increased by the presence of the non-precious-metal ions during carbonization as well, which is a result of the chelation effect of non-precious-metal atoms. Meanwhile, the FeCo nanoparticles (diameter < 5 nm) were protected by the multi-layer-graphene-like carbon layer from the harsh acid and uniformly anchored on graphitic carbon sub-microspheres, which can greatly improve the catalytic durability, particularly in acidic media. From the perspective of the whole catalytic system being used as an air electrode in rechargeable Zn-air batteries, the porous nitrogen-doped graphitic carbon framework was functionalised as a continuous conductive framework due to its catalytic activity towards high oxygen conversion and good electrical conductivity.</P>
Tran, Tung Xuan,Choi, Hayelin,Che, Cuong Huu,Sul, Ji Hwan,Kim, In Gyoo,Lee, Seung-Mo,Kim, Jae-Hyun,In, Jung Bin American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.46
<P>Supercapacitors are irreplaceable energy-storage devices for high power output and rapid charge/discharge of electrical energy. In this study, the laser-based fabrication of reduced graphene oxide (rGO) electrodes for supercapacitors is demonstrated with several new features of laser irradiation. A conventional CO<SUB>2</SUB> laser irradiation system is equipped with (1) a nitrogen blower to avoid combustion of the GO paper, (2) a cylindrical lens for producing a wide line beam, and (3) an optical chopper system for generating an intensity-modulated laser beam. Scanning of the intensity-modulated line beam transforms an extended area of GO into chemically reduced and physically porous graphene. The effects of the laser beam modifications and scanning parameters on the electrochemical performance of the rGO electrode are investigated. The rGO electrode exhibits a high specific capacitance (up to ∼130 F/g) at a current density of 1 A/g. This work can serve as a reference for the process optimization of laser-induced GO reduction.</P> [FIG OMISSION]</BR>
Fashion informatics of the Big 4 Fashion Weeks using topic modeling and sentiment analysis
최영현,윤승주,Bin Xuan,이상용,이규혜 한국의류학회 2021 Fashion and Textiles Vol.8 No.1
This study used several informatics techniques to analyze consumer-driven social media data from four cities (Paris, Milan, New York, and London) during the 2019 Fall/ Winter (F/W) Fashion Week. Analyzing keywords using a semantic network analysis method revealed the main characteristics of the collections, celebrities, infuencers, fashion items, fashion brands, and designers connected with the four fashion weeks. Using topic modeling and a sentiment analysis, this study confrmed that brands that embodied similar themes in terms of topics and had positive sentimental reactions were also most frequently mentioned by the consumers. A semantic network analysis of the tweets showed that social media, infuencers, fashion brands, designers, and words related to sustainability and ethics were mentioned in all four cities. In our topic modeling, the classifcation of the keywords into three topics based on the brand col‑ lection’s themes provided the most accurate model. To identify the sentimental evalua‑ tion of brands participating in the 2019 F/W Fashion Week, we analyzed the consumers’ sentiments through positive, neutral, and negative reactions. This quantitative analysis of consumer-generated social media data through this study provides insight into use‑ ful information enabling fashion brands to improve their marketing strategies.
Mohd Nurfirdaus Bin Mohiddin,Yie Hua Tan,Yee Xuan Seow,Jibrail Kansedo,N.M. Mubarak,Mohammad Omar Abdullah,Yen San Chan,Mohammad Khalid 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.98 No.-
The ever-detrimental condition of the environment due to the fossil fuel utilization has catalyzed thedevelopment of biodiesel. Biodiesel is produced mainly via transesterification and the entire processcomprises of several major components; the feedstock, the catalyst, the reaction, and the productseparation or purification. There are various factors affecting the amount and quality of biodieselproduced, such as the type and amount of feedstock and catalyst, alcohol-to-feedstock ratio, and reactiontemperature and time. The performance of biodiesel reactors in providing energy and time efficientbiodiesel production is also among the subject of recent studies. To produce biodiesel commercially andefficiently, it is important to recognize the novel technologies that are promising for biodiesel production. With this in mind, this article presents a review of the recent advancement and classification of thefeedstock, the catalyst for biodiesel production, and the biodiesel production reactor. Furthermore, thisarticle also highlights the development and application of oil extraction techniques, biochar as a biodieselcatalyst, and the magnetic biodiesel catalyst. The biodiesel production reactor and parametersoptimization are also discussed in this article in order to provide a better context on the chemicalreaction.
SEEING IS REMEMBERING? THE ROLE OF ATTENTION IN AUDIENCE MEMORY FOR PRODUCT PLACEMENT
Sigen Song,Bin Xuan,Guoxin Ma,Wei Xu 글로벌지식마케팅경영학회 2018 Global Marketing Conference Vol.2018 No.07
Similar to traditional advertising, product placement plays important roles in consumer purchasing behaviors through the AIDA model (e.g., Ghirvu,2013) of which attention is the very first stage. While there is an established literature on brand recall and recognition as methods of product placement evaluation, the role of attention, which is an important topic in traditional advertising research, has been sparsely studied in the context of product placement. This paper proposes that attention is a psychological state which affects information selection and processing. Captured attention reflects audience’s selective attention to editorial content including placements, while sustained attention (or processing) requires allocated attentional capacity to process information captured from the placement. When available attentional capacity is insufficient, product placements cannot be adequately processed to form accurate memory (Lee & Faber, 2007). Accordingly, this paper aims to investigate the pathway of ‘placement characteristics –audience attention – audience memory’ in order to reinterpret the relationship between placement characteristics and audience memory through the lens of attention. We do this by answering two pertinent questions: 1) how placement characteristics (e.g., exposure duration, frequency, location and size) influence captured attention; and, 2) how captured attention and sustained attention affect audience memory. To do so, we draw on psychology literature, especially the feature integration theory (Treisman & Gelade, 1980), in establishing the theoretical connections between placement features, captured attention, sustained attention and memory. By a theatre methodology, we found sustained attention mediated between captured attention and audience memory, while more prominent placement characteristics had stronger relationships with captured attention. Furthermore, audience’s levels of involvement in the media content and familiarity with the placed brand moderated the relationship between sustained attention and audience memory.
Mai, Ngoc Xuan Dat,Yoon, Juyeon,Kim, Ji Hyeon,Kim, Il Tae,Son, Hyung Bin,Bae, Joonwon,Hur, Jaehyun American Scientific Publishers 2017 Science Of Advanced Materials Vol.9 No.9
<P> Hybrid hydrogel and aerogel membranes composed of chitosan and Prussian blue were prepared by the dispersion of PB nanoparticles in chitosan solution, followed by gelation. The photocatalytic and photo-Fenton degradation of methylene blue (MB), as a model dye, was studied under simulated solar irradiation using these hybrid membranes. The hydrogel-based membrane was shown to show higher photodegradation activity than its aerogel-based counterpart toward the dye molecules. Furthermore, the hydrogel-based membrane showed superior recycling behavior compared with that of the aerogel-based membrane. Based on these experimental results, the CTS/PB-hybrid hydrogel membrane is a new, reusable, photo-Fenton catalyst for the treatment of wastewater using sunlight. </P>