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Resin infiltrant protects deproteinized dentin against erosive and abrasive wear
de Albuquerque Ana Theresa Queiroz,Bezerra Bruna Oliveira,Leal Isabelly de Carvalho,de Moraes Maria Denise Rodrigues,Melo Mary Anne S.,Passos Vanara Florêncio 대한치과보존학회 2022 Restorative Dentistry & Endodontics Vol.47 No.3
Objectives This study aimed to investigate the anti-erosive/abrasive effect of resin infiltration of previous deproteinized dentin. Materials and Methods Dentin slabs were randomly assigned to 3 groups (n = 15): Control (no deproteinization; no resin infiltrant applied), RI (no deproteinization; resin infiltrant applied), and DRI (deproteinization; resin infiltrant applied). After undergoing the assigned treatment, all slabs were subjected to an in vitro cycling model for 5 days. The specimens were immersed in citric acid (0.05 M, pH = 3.75; 60 seconds; 3 times/day) and brushed (150 strokes). Between the challenges, the specimens were exposed to a remineralizing solution (60 minutes). The morphological alterations were analyzed by mechanical profilometry (µm) and scanning electron microscopy (SEM). Data were submitted to one-way analysis of variance (ANOVA) and Tukey tests (p < 0.05). Results Control and RI groups presented mineral wear and did not significantly differ from each other (p = 0.063). DRI maintained a protective layer preserving the dentin (p < 0.001). After erosive/abrasive cycles, it was observed that in group RI, only 25% of the slabs partially evidenced the presence of the infiltrating, while, in the DRI group, 80% of the slabs presented the treated surface entirely covered by a resin-component layer protecting the dentin surface as observed in SEM images. Conclusions The removal of the organic content allows the resin infiltrant to efficiently protect the dentin surface against erosive/abrasive lesions.
Flor Gutierrez De la Cruz,김근형 한국인터넷전자상거래학회 2022 인터넷전자상거래연구 Vol.22 No.5
Newspaper articles are text data that record major issues or events that occur in the society we live in. Analyzing newspaper article text can derive interesting patterns of social phenomena. In this paper, topic modeling analysis was conducted by dividing the text of COVID-19-related newspaper articles by article writing period and newspaper type, and its meaning and implications were derived from a social and technical perspective. Texts of COVID-19-related articles were collected from Bigkinds, which provides news articles from various newspapers published in Korea, basic text analysis and major topics were extracted to examine major issues and countermeasures of COVID-19. The extracted topics were divided into the article writing period (2021 and 2022) and the newspaper type (national and local newspapers), and some implications were derived accordingly. First, the main topics of COVID-19-related news articles were 'political support', 'social response', 'corona quarantine', and 'overseas situation'. Second, the 'policy support' topic was widely covered in national newspapers in 2022 due to the influence of the 2022 presidential election. Third, it can be seen that local governments are more interested in support and consideration for the socially disadvantaged than the central government, and that they were also more active ahead of the presidential election. Fourth, the 'COVID-19 Quarantine' topic was more covered in local newspapers than in national newspapers. Fifth, from a technical point of view, it was expected that performing T-verification as a method of measuring the accuracy of the extracted topics could be a good technical method for optimizing topic modeling.
Camila Flor J. Yagonia,박현준,홍소연,유영제 한국생물공학회 2015 Biotechnology and Bioprocess Engineering Vol.20 No.2
An enzyme with improved characteristics is required for biochemical processes to be economically feasible. In this study, improvements in both the stability and activity of Candida antarctica lipase B (CALB) were integrated through multiple-site mutagenesis. CALB was divided into two regions to optimize its performance. Modulating the flexibility within the substrate-binding region and the hydrophilic solvent-affecting region can enhance the catalytic activity and organic solvent stability of CALB, respectively. Combining the mutation sites from the substrate-binding region and from the hydrophilic solvent-affecting region yielded an enzyme (V139E,A92E) with improved functionality. These findings suggest that the characteristics of CALB can be augmented by modulating its flexibility, and this method can possibly be applied to other lipases.
Nicola Flor,Alessandro Campari,Anna Ravelli,Maria Antonietta Lombardi,Andrea Pisani Ceretti,Nirvana Maroni,Enrico Opocher,Gianpaolo Cornalba 대한영상의학회 2015 Korean Journal of Radiology Vol.16 No.4
Contrast-enhanced computed tomography colonography (CE-CTC) is a useful guide for the laparoscopic surgeon to avoid incorrectly removing the colonic segment and the failure to diagnose of synchronous colonic and extra-colonic lesions. Lymph node dissection and vessel ligation under a laparoscopic approach can be time-consuming and can damage vessels and organs. Moreover, mesenteric vessels have extreme variations in terms of their courses and numbers. We describe the benefit of using an abdominal vascular map created by CE-CTC in laparoscopic colorectal surgery candidates. We describe patients with different diseases (colorectal cancer, diverticular disease, and inflammatory bowel disease) who underwent CE-CTC just prior to laparoscopic surgery.
Formulation and Shelf Life of a Nutritional Supplement for Undernourished Elderly People
Fabiane La Flor Ziegler,Jose de Assis Faria,Valdemiro Carlos Sgarbieri 한국식품과학회 2008 Food Science and Biotechnology Vol.17 No.2
A nutritional supplement was developed aiming at correcting the most common nutrient and caloric deficiencies encountered in elderly people (≥60 years old). The protein source was a mixture of whey protein isolates (WPI) and bovine collagen hydrolysate (BCH) with high nutritional and functional qualities making up 12% of the formulation. The carbohydrate fraction was composed of sucrose, inulin (soluble fiber), and fructo-oligosaccharide (prebiotic). The most commonly deficient essential minerals and vitamins were also included. Acceptance of the product was good according to both an elderly panel and a laboratory panel composing of both sexes and various ages. The stability of the formulations was evaluated and the estimated shelf life at room temperature (ca. 27℃) was approximately 4 months.
DATA SET SECURITY EFFECTS ON RECOMMENDATION SYSTEMS
Liaq Ridda,Flor Gutierrez De la Cruz 한국경영과학회 2023 한국경영과학회 학술대회논문집 Vol.2023 No.5
Recommendation systems are trending nowadays, and with the vast deployment of these systems, data protection is required. This paper focuses on the security efforts in a recommendation system for a dataset. In some domains (e.g., the medical, or financial sector), data security and the impact of data manipulation on a system are more relevant than others. The work’s primary goal is to focus on data security effects on recommendation systems and how to protect our dataset from intruders if any data is changed. In this project, the data set was attacked by an intruder, which changed the dataset which was correctly, and as a result, the output that was predicted was wrong, and as an effect of that, the user failed to proceed and complete the task on time, and the project failed. We apply classification using a convolutional neural network (CNN) on two different datasets separately. We measure the effect of the data manipulation over these networks. We compare the result of a neural network trained on the original dataset with the one trained with the modified dataset. We consider a dataset containing ten different cases. We modify the dataset by changing the output values of one use case. Once the values are modified, we train a separate neural network based on this new dataset. The recommendation system was trained and tested on the modified data, and the results were wrongly calculated due to the data set differing from the original data set. When we apply a similar training and testing process on both Neural Networks, the modified dataset has incorrect results for 10 percent of the dataset.
Tangerine Peel Research Trend Analysis Using Text Mining
강정운,김민철,Flor Gutierrez De la Cruz (사)한국조리학회 2022 한국조리학회지 Vol.28 No.9
This study was conducted through the analysis of data on tangerine peel for the industrialization in Jeju Special Self-Governing Province. This study confirmed the possibility of tangerine peel as a healthy functional food in daily life as people's interest in their own health increased. The purpose of this research is to analyze the keywords of tangerine peel through text mining, data analysis technology and to discuss the direction of Jeju’s tangerine peel industrialization. This study uses text mining to focus on 108 research provided by RISS and compares the differences in the keywords used throughout the articles by dividing them every 10 years from 1990 to 2022. As a result of this study, it can be expected that tangerine peel can be used as a health functional food due to the increasing research on health-related efficacy of the components of tangerine peel. In addition, since 2020, various studies have demonstrated the emergence of new keywords such as paint and coal, which suggests a new perspective of the purpose of the components of tangerine peel. The outcome of this study can be used as a reference for strategies in the industrialization of citrus peel in the future.