Search

Your search keyword '"Joonoh Myoung"' showing total 3 results
Start Over Author "Joonoh Myoung"
3 results on '"Joonoh Myoung"'

1. Effect of the skincare product on facial skin microbial structure and biophysical parameters: A pilot study

Author

Bo Kyoung Hwang, Sado Lee, Joonoh Myoung, Seung Jin Hwang, Jun Man Lim, Eui Taek Jeong, Sun Gyoo Park, and Sung Hun Youn

Subjects
skin environment, skin microbiome, skin physiology, skincare product, Microbiology, QR1-502
Abstract

Abstract Daily use of cosmetics is known to affect the skin microbiome. This study aimed to determine the bacterial community structure and skin biophysical parameters following the daily application of a skincare product on the face. Twenty‐five Korean women, who used the same skincare product for four weeks participated in the study. During this period, skin hydration, texture, sebum content, and pH were measured, and skin swab samples were collected on the cheeks. The microbiota was analyzed using the MiSeq system. Through these experiments, bacterial diversity in facial skin increased and the microbial community changed after four weeks of skincare product application. The relative abundance of Cutibacterium and Staphylococcus increased, significant changes in specific bacterial modules of the skin microbial network were observed, and skin hydration and texture improved. It was suggested that daily use of skincare products could affect the microbial structure of facial skin as well as the biophysical properties of the facial skin. These findings expand our understanding of the role of skincare products on the skin environment.

Published
2021
Full Text
View/download PDF

2. Validation of the elastic angle for quantitative and visible evaluation of skin elasticity in vivo

Author

Joonoh Myoung, Eui Taek Jeong, Sun Gyoo Park, Jun Man Lim, Nae-Gyu Kang, and Mina Kim

Subjects
Adult, Aging, Dermatology, Middle Aged, 01 natural sciences, Elasticity, Skin Aging, 010309 optics, Young Adult, 030207 dermatology & venereal diseases, 03 medical and health sciences, Cheek, 0302 clinical medicine, 0103 physical sciences, Coefficient of restitution, Skin Abnormalities, Humans, Female, Negative correlation, Skin elasticity, Biomedical engineering, Mathematics
Abstract

BACKGROUND Reduction in skin elasticity due to aging causes skin sagging and wrinkles. Although there are various objective and reliable techniques for measuring skin elasticity, it is difficult to obtain a visual representation of skin elasticity with them. Therefore, we developed a novel device, the Swing anglemeter, and analyzed its effectiveness for measuring skin elasticity of the cheek. MATERIALS AND METHODS Forty-five healthy Korean women (age, 23-60 years) participated. The Swing anglemeter works by dropping a rubber ball on a subject's cheek, which draws a curve as it collides with the cheek. After recording the movement of the ball using the slow-motion function on a mobile phone, we defined the maximum angle at which the ball bounces off the skin as the elastic angle, using frame-by-frame video analysis. Changes in the elastic angle were assessed according to age, and correlation with the Ballistometer® results (Dia-stron Ltd., Andover, UK) was analyzed for validation. RESULTS Elastic angles differed significantly (P

Published
2021
Full Text
View/download PDF

3. Repeated measurements of facial skin characteristics using the Janus-Ⅲ measurement system

Author

Jinyong Lee, Joonoh Myoung, Junghwa Chang, Seo-Gyeong Lee, Yunkwan Kim, Sangseob Leem, Joong-Gon Shin, Sun Gyoo Park, Suji Yoo, Hae Jung Song, and Nae-Gyu Kang

Subjects
Male, Porphyrins, Computer science, Ultraviolet Rays, Single measurement, Skin Pigmentation, Dermatology, Nose, 01 natural sciences, 010309 optics, 030207 dermatology & venereal diseases, 03 medical and health sciences, 0302 clinical medicine, Consistency (statistics), Skin Physiological Phenomena, 0103 physical sciences, Republic of Korea, medicine, Image Processing, Computer-Assisted, Photography, Humans, Forehead, Wrinkle, Skin, Skin care, integumentary system, business.industry, System of measurement, Pattern recognition, Imaging analysis, Skin Aging, Facial skin, Sebum, medicine.anatomical_structure, Face, Female, Artificial intelligence, medicine.symptom, Anatomic Landmarks, business
Abstract

Background For personalized skin care, noninvasive quantitative methods to evaluate facial skin characteristics are important. Janus-III is one of the most widely used imaging analysis devices in the skin care industry in Korea. Janus-III generates values for a range of skin characteristics. Due to the convenience of obtaining results for a variety of skin characteristics in a single measurement, the use of Janus-III in cosmetic stores and research institutes has been recently increasing. However, the consistency of skin measurements of Janus-III has not been elucidated yet. Materials and methods In this study, we repeated skin measurements three times for 70 different subjects and compared each numerical value in order to assess the consistency of the Janus-III. For this purpose, we compared between-sample distances and within-sample distances. Results We found important patterns for future analyses in terms of consistency. First, the average values of skin measurement categories were more reliable than individual part values of facial segments. Second, center part values such as forehead and nose were more reliable than side part values such as left and right part segments. Conclusion If researchers who use Janus-III for studies of facial characteristics analyze average and center part values first, they can obtain relatively reliable patterns of facial skin characteristics.

Published
2019

Catalog

Books, media, physical & digital resources
See catalog results