The Effect of Topical Indomethacin and Topical Corticosteroid on UVB Induced Erythema

Cho, Moon Kyun,Kim, Young Keun,Whang, Kyu Uang,Jung, Hyun Korean Dermatological Association 1995 Annals of Dermatology Vol.7 No.2

P159 : Solar lentigines treated by using Q-switched ND:YAG

( Ji Seok Kim ),( Chan Hee Nam ),( Jee Young Kim ),( Ji Won Gye ),( Seung Phil Hong ),( Myung Hwa Kim ),( Byung Cheol Park ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2

Background: Laser therapy is known to be superior to other classic methods for treatment of solar lentigines and Q-switched Nd:YAG, alexandrite, and ruby have shown a good result. Objectives: Using colorimeter, we tried to make an objective evaluation of efficacy and side effects of Q-switched Nd:YAG laser for the treatment of solar lentigines. Methods: A total of twenty Korean volunteers with solar lentigines on face were enrolled. Each patient received two sessions of 535nm Q-switched Nd:YAG laser treatment with 4 weeks intervals, and had additional 4 weeks of follow-up. All were treated with 20 nanoseconds pulse width, energy of 0.7-0.8 J/cm2 and 3-4 mm spot size. Improvement was assessed based on the comparison of pre- and post-treatment photographs. For more objective measurement, we checked the same spot of solar lentigo for three times using colorimeter at both baseline and final visit, and got the average value. Results: Of the 20 patients, 10 patients (50.0%) showed excellent response after two treatment sessions and 4 patients (20%) had marked response on the investigator global assessment. The average improvement was 72.25%. The ‘B’ value decreased from 18.69 to 16.89, indicating that the degree of the brown pigmentation has decreased. Conclusion: Based on the study, it could be speculated that the Q-switched Nd:YAG has a good effect on the treatment of solar lentigines which has been confirmed with objective and subjective measurement by using colorimeter.

The Effect of pH on Sodium Lauryl Sulfate Irritancy Potential : Non-Invasive multiple parameter measurement

Park, Soo Keun,Houh, Dong,Oh, Yung Jin,Kim, Kyung Ok,Kim, Chung Won Korean Dermatological Association 1990 Annals of Dermatology Vol.2 No.1

모발 염색 후 두피스케일링의 효과

허옥범 ( Ok-bum Her ),이근광 ( Keun-kwang Lee ) 대한미용문화예술학회 2020 대한미용문화예술학회지 Vol.9 No.1

This study investigate to the effects after hair dyeing. To analyze scalp scaling effects after hair dyeing, an experiment was performed among 3 beauty salon customers, and the results were comparatively analyzed using a color-difference meter. The results found the following: In terms of scalp conditions through scalp scaling after hair dyeing, the scalp became brighter and clearer after scaling with some pigments on the scalp partially removed. After dyeing, the scalp state before and after scalp scaling was measured and analyzed using a colorimeter. As a result, after dyeing, the brightness of the scalp was brighter than before scalp scaling.

COMPARISON OF SHADE CHANGES ACCORDING TO DRY/WET CONDITION OF TEETH USING INTRA-ORAL COLORIMETER

Lee, Dong-Hwan,Han, Jung-Suk,Yang, Jae-Ho,Lee, Jai-Bong The Korean Academy of Prosthodonitics 2005 대한치과보철학회지 Vol.43 No.3

Objectives. The purpose of this study was to compare the shade changes in wet and dry conditions of natural teeth using two different intra-oral colorimeters. Materials and methods. Twenty volunteer subjects have no restorations and fillings in the maxillary central incisors were involved in this clinical study. The color of tooth was measured by two different instruments that were a Shade $Scan^{TM}$ System and a VITA $Easyshade^{(R)}$, Five times consecutive measurements were done for each subject with both instruments. Groups of measurement are an initial wet condition as control, dry in 5 minutes, 15 seconds after re-wetting with saliva, re-wetting after 5minutes and re-wetting after 30 minutes. Using ShadeScan $System^{TM}$, tooth image was captured and converted to the mapping image of Vitapan 3D master. Three main shades were chosen from each subject and calculated the area in Global Lab Image software. Data were analyzed using paired T-Test and Wilcoxon Signed Ranked Test. Using VITA $Easyshade^{(R)}$, color differences($\Delta$E) between measurements were analyzed with one sample T-test. Results. Using ShadeScan $System^{TM}$, there were significant differences between control group and dry(P=.023), dry and re-wetting 15 seconds, 5 minutes, 30 minutes as well(P=.021, P=.017, P=.030) in comparison of primary shade. However, comparing three main shades, there was no significant difference between control and dry(P=.105). Using VITA $Easyshade^{(R)}$, color differences($\Delta$E) between control and dry, dry and re-wetting 30 minutes were statistically different(P=.002, P=.022). Conclusion. Primary shade could be changed in dry and wetting procedure in time, however there was no significant shade changes in overall.

측색기를 활용한 건설안전표지의 측색과 평가

정철우,이재용 한국건축시공학회 2019 한국건축시공학회지 Vol.19 No.3

Safety sign panel has been used in construction sites to assure the safety of the workers. Such safety panel can be categorized as 4 different signals, such as prohibition, warning, indication, and information. Each of the categorized item must follow lawful which is specifically designated for its own purposes, on its color and the shape. However, the color and shape of the safety sign panels that have been used in construction sites are not found to follow the suggested lawful requirement, and such differences are originated from safety merchandise production company or vendor, and construction company. In this study, samples of safety sign panels were obtained from various construction sites in Republic of Korea then the colors of such samples were measured, analyzed, and compared. According to the results, colors of the safety sign panels were out of the lawful requirement due to the aging and surface contamination of the safety sign panel. Frequent maintenance on the safety sign panel is therefore necessary. In addition, steel panels that were used in the construction sites were found to be unsuitable to meet the lawful requirements. In order to the color requirements on safety sign panel, it is recommended for Korea Occupational Safety and Health Agency to provide standard reference sample for each material used to produce safety sign panel, to distribute them to the producer and construction sites, and to supervise overall system. 본 연구에서는 건설현장에 설치된 표지판을 측색하여 색 기준에 대한 적합성 검토와 현장여건에 적합한 관리 방안을 제시하고자 하였으며, 현장에 설치된 안전표지판은 관련기준에 적합한 정도가 적색 33%, 황색 22%, 청색 3%, 녹색 28%로 나타나 각각의 현장에 설치된 법적인 기준에 대부분 적합하지 않은 것으로 나타났으며, 청색 안전표지판에 대하여 보다 적극적인 제조생산과 관리에 대한 관련기관의 감독이 필요하다.

딸기 유전자원의 안토시아닌 함량 변이와 색차계를 이용한 안토시아닌 함량 추정

김대영,김성겸,전창후,김수,채원병,곽정호,박수형,정승룡,윤무경 한국육종학회 2013 한국육종학회지 Vol.45 No.4

딸기 유전자원 중 원예적 특성이 우수하여 육종 소재로 활 용 가능성이 높은 19품종을 대상으로 완숙된 과실을 부위별 (과피 및 과실 전체)로 안토시아닌 함량을 분석하고 색차계를 이용하여 비파괴적인 방법으로 안토시아닌 고함유 계통을 선 발할 수 있는지에 대하여 검토하였다. 그 결과 딸기의 과피는 22.04~87.16 mg·100 g -1 FW, 과실 전체는 1.98~30.16 mg·100 g -1 FW의 범위에 분포하여 측정 부위와 유전자원에 따라 안토시아닌 함량의 변이가 큼을 알 수 있었다. 과실 전 체를 기준으로 하였을 때, 조사된 유전자원 중 ‘Sachinoka’, ‘Tamar’, ‘Amaou’, ‘Summerberry’ 순으로 안토시아닌 함량 이 높게 나타났다. 과피와 과실 전체 부위의 안토시아닌 함량 간의 상관계수가 0.867로 높아 과피를 기준으로 하여 과실 전 체의 안토시아닌 함량을 추정할 수 있을 것으로 생각된다. 또 한 과실 전체의 안토시아닌 함량과 측정된 색차계의 L*값 (-0.791) 및 b*값(-0.772)에서 높은 역의 상관관계를 보였다. 따라서 향후 딸기 육종 프로그램에서 안토시아닌 고함유 계 통을 신속하게 선발할 때, 색차계를 보조적인 방법으로 활용 할 수 있을 것으로 판단된다. This study was conducted to find out an efficient and non-destructive method to select strawberry plants with high anthocyanin content in breeding programs. The total anthocyanin content in both fruit skin and whole fruit of fully ripe fruits was analyzed by HPLC in 19 strawberry cultivars, which were selected among germplasm as potential breeding materials based on their good horticultural traits. The anthocyanin content varied greatly among cultivars, ranging from 22.04 to 87.16 mg·100g -1 FW in fruit skin and from 1.98 to 30.16 mg·100g -1 FW in whole fruit. For the anthocyanin content of whole fruit, it was high in the order of ‘Sachinoka’, ‘Tamar’, ‘Amaou’ and ‘Summerberry’. A correlation coefficient of anthocyanin content between fruit skin and whole fruit was significantly high as 0.867 and, therefore, the anthocyanin content of whole fruit can be estimated by that of fruit skin. Besides, the anthocyanin content of whole fruit was strongly negatively correlated with L* (lightness, -0.791) and b* (yellowness, -0.772) values measured by portable colorimeter. Therefore, the portable colorimeter can be a rapid and nondestructive method to estimate anthocyanin content of strawberry fruits when selecting anthocyanin-enriched strawberry lines in strawberry breeding programs.

부피팽창률법을 이용한 활엽수 열처리 목재의 섬유포화점 측정

이승진,강호양,강석구,강춘원 한국가구학회 2012 한국가구학회지 Vol.23 No.2

Specimens of seven hardwood species were heat-treated at three temperature levels of 170, 190 and 210°C. Their FSP’s were measured by the volumetric swelling method and compared with the control’s. Within a species the FSP decreases as the temperature of heat treatment increases. The FSP’s of the controls range from 26.1 to 29.6%, while those of the specimens heat-treated at 210°C from 16.9 to 21.8%. There were no difference of basic density between the heat-treated and control specimens. The color indexes of ash and beech specimens were measured using a colorimeter. It was revealed that the temperature of heat treatment affected on the color more than the treatment time.

알칼리처리가 파래의 녹색도 및 휘발성 향에 미치는 영향

이영근 한국생명과학회 2001 생명과학회지 Vol.11 No.6

파래(Monostrima nitidum) 의 퇴색지연 방안을 모색하고자. 알칼리화제로써 이용 가능한 몇 종의 식품첨가물을 선정하고 이를 생 파래와 함께 9$0^{\circ}C$에서 10분간 blanching 하여 건조 및 분쇄한 후 $25^{\circ}C$의 암소에서 5개월 간 저장하면서 각 시료의 녹색도를 Hunter-lab colorimeter로 측정하고 휘발성 향을 CG-MS로 조사하였다. 저장 중 알칼리를 처리한 파래의 녹색도는 미처리한 시료에 비하여 조금 덜 퇴색되었으며, 특히 KHCO$_3$로 처리한 경우 다소 효과가 있었다. SDE장치(simultaneous distillation-extract apparatus)로 포집한 파래의 휘발성 향에서 31종의 화합물들이 확인되었다. 이들 중 파래의 특징적 향으로 기여하는 주요 화합물 $\beta$-cyclocitral, $\beta$-cyclohomocitral, ionene, $\alpha$-ionone and $\beta$-ionone으로 추정되었으며, 이 화합물들의 함량은 알칼리 처리에 의하여 감소되었지만, KHCO$_3$를 처리할 경우 다소 덜 감소되었다. Sea lettuce(Monostrima nitidum) were treated with several alkali agents on condition with water blanching at 9$0^{\circ}C$ for 10 min., and followed by drying and powdering, thus, the power samples treated and the not treated were then allowed to be stored at $25^{\circ}C$, dark place for 5 months. The sea lettuce powder samples were evaluated for green color intensity and volatile flavor at a month intervals. The green intensity of the samples were measured by using Hunter-lab colorimeter, therefore, the decoloration of greenness were seen in both of the samples treated and the not treated, but there were slight inhibitory effects on decoloration in the treated with alkali agents, especially in the treated with KHCO$_3$.The volatile flavor of the samples were collected by simultaneous distillation-extraction, and then the 31 flavor compounds were separated on HP-5 capillary column(25m$\times$0.25mm i.d) and identified by using GC-MS. From these results, it was presumed that the characteristic impact flavor compounds were $\beta$-cyclocitral, $\beta$-cyclohomocitral, ionene, $\alpha$-ionone and $\beta$-ionone. The total content of the characteristic impact flavor compounds decreased in the samples treated with alkali agents more alkali agents more than in the not treated, but lee decrease was observed in the treated with KHCO$_3$.

Natural Weathering of Wood Heat-Treated at $220^{\circ}C$

Kang, Ho-Yang Korea Furniture Society 2008 한국가구학회지 Vol.19 No.6

When wood is exposed to natural weathering and UV radiation discoloration progresses. The color variation of heat-treated wood was investigated. Four domestic species were selected and heat-treated at $220^{\circ}C$ and naturally weathered for 42 days. Their colors were measured with a portable colorimeter. The color variations were different between species. The Korean red pine specimens were highly discolored by the natural weathering even though they were heat-treated. In contrast to Korean red pine, Korean pine is less discolored. The maximum color difference of larch was lower than Korean red pine. All specimens of birch exceeded the color difference criterion of 15 after 25 hours with the maximum of 28.