Clinical assessment of whitening efficacy and safety of in-office tooth whitening system containing 15% hydrogen peroxide with or without light activation (original) (raw)
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Journal of Life Science, 2019
Saposhnikovia has been used as a traditional medicinal herb in Asia because of the reported anti-inflammatory, anti-allergic rhinitis, pro-whitening, anti-atopy, anti-allergy, and anti-dermatopathy effects of the phytochemical compounds it contains. In this study, we investigated the antioxidant effects of a Saposhnikovia extract after fermentation by Lactobacillus plantarum BHN-LAB 33. Saposhnikovia powder was inoculated with L. plantarum BHN-LAB 33 and fermented at 37℃ for 72 hr. After fermentation, the total polyphenol content of the Saposhnikovia extract increased by about 14%, and the total flavonoid content increased by about 9%. The superoxide dismutase-like activities, DPPH radical scavenging, ABTS radical scavenging, reducing power activity, and tyrosinase inhibition activity also increased after fermentation by approximately 70%, 80%, 45%, 39%, and 44%, respectively. The results confirmed that fermentation of a Saposhnikovia extract by L. plantarum BHN-LAB 33 is an effective way to increase the antioxidant effects of the extract. The bioconversion process investigated in this study may have the potential to produce phytochemical-enriched natural antioxidant agents with high added value from Saposhnikovia matrices. These results can also be applied to the development of improved foods and cosmetic materials.
Journal of Korean Society of Occupational and Environmental Hygiene
Objectives: The objective of this study was to determine characteristics of workers' exposures to airborne total and hexavalent chromium by job title in electroplating processes. Methods: Total Cr was determined through a modified method based on NIOSH Method 7024. Airborne hexavalent Cr, Cr(VI), was sampled and extracted according to NIOSH Method 7600 and analyzed at 520 nm using an ion chromatograph/visible detector. Results: The geometric mean(GM) of total Cr concentrations from all factories was 11.2 ㎍/m 3 (GSD=4.9). The GM of Cr(VI) concentrations from all factories was 2.84 ㎍/m (GSD=5.2), and the concentrations among factories were significantly different (p<0.05). The Cr(VI) levels were lower than total Cr levels. Total Cr exposure levels were highest among buffing workers (21.6 ㎍/m 3), but Cr(VI) levels were highest among plating workers(4.15 ㎍/m 3). The concentrations of Cr(VI) and total Cr from plating tasks was highly correlated(r=0.91). Conclusions: In the electroplating industry, plating workers were mainly exposed to Cr(VI), but others were not. Oxidation-reduction states of Cr and job titles should be considered in the exposure or risk assessments of chrome electroplating factories.
Analysis of Peroxide Curing Agents in EVA Compounds and Vulcanizates
2020
Poly(ethylene-co-vinyl acetate) compounds and vulcanizates containing dicumyl peroxide (DCP) (HD) were prepared, and the curing agent and reaction products were analyzed using gas chromatography/mass spectrometry (GC/MS). Samples containing trially cyanurate (TAC) and DCP (HDT) were also prepared and analyzed. Some raw DCP were decomposed in the injector region of GC to produce acetophenone. DCP was detected in the HD compound but was not observed in the HD vulcanizate, and instead acetophenone and 2-phenyl-2-propanol were detected. Both DCP and TAC were observed in the HDT compound but not in the HDT vulcanizate, where acetophenone and 2-phenyl-2-propanol were detected. Thus, some of the DCP decomposed during the compounding process. The formation mechanism for acetophenone and 2-phenyl-2-propanol during the crosslinking reaction was identified, and differences in the crosslinking reactions of HD and HDT compounds were discussed.
A Study on the Operational Variables of the UV-TiO _2_2_2 Based Photocatalytic Air Cleaning System
Journal of Korean Society of Environmental Engineers, 2008
: A study on the operational variables of the UV-TiO 2 based photocatalytic air cleaning system was tried. In this study, toexamine effects as various air cleaning system conditions, a duct-type reactor was made, and TiO 2 was immobilized on a stainless mesh.Benzene was chosen as a target compound. Removal experiments for benzene were done under different initial benzene concentration, air velocity, TiO 2 loading, area coated TiO 2 as the same TiO 2 loading, and UV light intensity conditions. During the experiments, rela-tive humidity was 55%, and reactor temperature was 45. As a result, the photocatalytic degradation of benzene decreased as the inletconcentration increased. But the photocatalytic degradation increased as the concentration boundary layer thickness, amount of TiO 2 , areacoated TiO 2 as the same amount of TiO 2 , and UV light intensity increased. Based on results of current study, they can be applied to thedesign of air cleaning system over low level VOCs in the ind...
Evaluation of the Performance of Lumipulse G1200 for Tumor Marker Assays
Laboratory Medicine Online, 2012
G1200 (Fujirebio, Tokyo, Japan)이 국내에 도입되었다. 저자들은 종양표지자인 carcinoembryonic antigen (CEA), α-fetoprotein (AFP), cancer antigen 125 (CA125), cancer antigen 15-3 (CA15-3), cancer antigen 19-9 (CA19-9), prostate specific antigen (PSA), protein induced by vitamin K absence or antagonist-II (PIVKA-II),
Journal of the Korean Glaucoma Society
Purpose: We describe a novel use of intracameral Indocyanine green (ICG) to confirm aqueous outflow to collector channels and aqueous veins after trabecular microbypass Schlemm's canal stent insertion (iStent inject ® W; Glaukos Corporation, Laguna Hills, CA, USA). Case summary: We report three cases of glaucoma patients who underwent trabecular microbypass stent to observe aqueous outflow into episcleral veins using intracameral ICG dye injection. 0.5% ICG dye was injected intraoperatively into the anterior chamber near the stents. Automated irrigation or manual injection of balanced salt solution was used to pressurize the eye after ICG injection. We confirmed the episcleral and intrascleral vein engorgement and aqueous egression with ICG in two of the three cases. Although one case did not demonstrate the ICG egression into episcleral vein, episcleral vein engorgement was observed immediately. Conclusions: To the best of our knowledge, this is first report using ICG dye to identify the aqueous outflow, especially trabeculocanalicular outflow during trabecular microbyapss stenting. Intracameral ICG dye injection might be safe and effective to identify aqueous outflow and Schlemm's canal stent patency during trabecular microbypass stents implantation.
Psychosocial Predictors of Quality of Life in Patients With Vitiligo
2021
The present study was designed to examine psychosocial predictors of quality of life (QoL) such as body image, self-esteem, impact of Vitiligo (psychologically and socially), and perceived stigmatization in patients with Vitiligo. The sample (N =120) comprised of individuals with Vitiligo recruited from dermatology units of different hospitals in Lahore. Body Image State Scale (Cash, Fleming, Alindogan, Steadman, & Whitehead 2002), Rosenberg Self-Esteem Scale (Rosenberg, 1965), Vitiligo Impact Scale (Rammam, Khaitan, Mehta, Sreenivas, & Gupta, 2014), Perceived Stigmatization Questionnaire (Lawrence, Fauerbach, Heinberg, & Thomas, 2006) and Dermatology Life Quality Index (Finlay & Khan, 1994) were used as assessment measures. Results revealed that most of the individuals with Vitiligo reported poorer perception of QoL; while, men with Vitiligo expressed better perceived QoL as compared to women. Individuals with both types of Vitiligo (lesions on exposed/unexposed regions) expressed ...
The Korean Journal of Helicobacter and Upper Gastrointestinal Research, 2015
Background/Aims: Helicobacter pylori eradication rates achieved by first-line triple treatment with proton pump inhibitor (PPI), clarithromycin, and amoxicillin have decreased to 70∼85%, in part due to increasing antimicrobial resistance. This study evaluated the trend in H. pylori eradication rates during the most recent 8 years in Daegu, Korea and analyzed different clinical factors between success group and failure group of H. pylori eradication. Materials and Methods: This was a retrospective study at a single institution. A total of 768 H. pylori-positive patients who received one or two weeks of first-line triple regimens were included between January 2007 and October 2014. Results: The overall H. pylori eradication rate was 86%. The eradication rate from years 2007 to 2014 was 80.5%, 89.4%, 95.6%, 85.5%, 87.9%, 75.8%, 83.3%, and 85.8%, respectively (P=0.027). There was no significant difference in the eradication rate among various PPIs (P=0.358). In addition, there were no significant difference of clinical factors between success and failure group of H. pylori eradication. Conclusions: The eradication rates of first-line triple therapy for H. pylori over 8 years were 75.8∼95.6%. No significant difference in clinical factors were noted between success and failure group of H. pylori eradication. Triple therapy may be a useful regimen for
Journal of Korean society of Dental Hygiene, 2015
Objectives: The objective of the study is to investigate oral health behavior and oral health education experience in Korean adolescents from the ninth(2013) web-based survey of Korean youth risk behavior. Methods: The subjects were 72,435 students through the ninth 2013 web-based survey of Korean youth risk behavior conducted by the Ministry of Education, Science, and Technology, the Ministry of Health and Welfare, and the Korea Centers for Disease Control. The questionnaire consisted of socio-demographical characteristics of the subjects, oral health behavior, and oral health education experience. Data were analyzed by SPSS 18.0 program. Results: Oral health education had much influence on tooth brushing after lunch, oral cavity disease prevention, sealants, fluoride application, scaling experience, and consumption of vegetables, milk, carbonated soft drinks, noodles, and snacks. The oral health education had a great impact on those who took good oral health behavior into action. Conclusions: It is very important and necessary to develop the continuing effective oral health education program for the adolescents and make them tale into action.