Assessment of hair surface roughness using quantitative image analysis

Park, Keun Hyung; Kim, H. J.; Oh, Byungho; Lee, E.; Ha, J.

doi:10.1111/srt.12393

Cited by 11 publications

(10 citation statements)

References 31 publications

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“…The last questionnaire asked whether the fragrance influences the purchasing of cosmetic products. In the study, a brief questionnaire was used for the survey . In Table , out of 12 participants who successfully finished the study, 11 participants (92%) answered that the fragrance of lavender provided the stabilizing effect and the peppermint the arousal effect.…”

Section: Resultsmentioning

confidence: 99%

“…The statistical analysis was performed by the paired t test and Wilcoxon test using the SPSS 14.0 statistical software program (SPSS, Inc., Chicago, IL). 28,29 A P-value of <0.05 was considered as statistically significant. The result is expressed as the mean ± standard deviation.…”

Section: Discussionmentioning

confidence: 99%

“…EEG is a universally used device for brainwave measurements and can verify the brain activity using numerous brainwaves. The measurement is performed based on the International 10-20 system, and the wavelengths are classified into delta (0.5-4 Hz), theta (4-8 Hz), alpha (8)(9)(10)(11)(12)(13), beta (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), and gamma . Through the association between brainwave and fragrance, the effects of fragrance on mood and preference can be verified.…”

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confidence: 99%

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Evaluation of human electroencephalogram change for sensory effects of fragrance

Park¹,

Kim²,

Oh³

et al. 2019

Skin Research and Technology

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Background The stabilizing effect of lavender and the arousal effect of peppermint essential oils are acknowledged and used widely in aromatherapy and the cosmetics industry. However, no evaluation method confirms the effects of essential oils through quantitative and objective electroencephalogram (EEG) results; instead, only a psychological and subjective method exists. Therefore, this study aims to create a new emotional cosmetic evaluation paradigm using EEG values. Moreover, it enables quantitative interpretation of the results in addition to the subjective survey outcomes. Methods For this study, 12 healthy female Korean participants were recruited and three fragrances were used. The EEG results were collected for 3 minutes (1 minute each before, during, and after inhalation of every fragrance). Results The quantitative EEG outcomes indicate changes in the participant's brainwaves before and after inhalation. Significant changes in the EEG were observed. Based on the results, the effects of fragrances were confirmed to be stabilizing for lavender, and arousing for peppermint and coffee aroma. Furthermore, the subjective questionnaire results indicate similar tendency as that of the quantitative EEG results. Conclusion In addition to psychological and subjective assessments, our emotional evaluation method can verify the cosmetic fragrance effects through quantitative and objective results.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Evaluation of human electroencephalogram change for sensory effects of fragrance

Park¹,

Kim²,

Oh³

et al. 2019

Skin Research and Technology

Self Cite

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“…A paired t test was employed to compare grades of scalp sensitivity among different methods. Categorical variables were compared using chi‐square tests ( χ 2 ) using the statistical software program SPSS 14.0 (IBM Corp) . A P ‐value of <.05 was considered statistically significant.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of factors triggering sensitive scalp in Korean adult women

Park¹,

Kim²,

Oh³

et al. 2019

Skin Res Technol

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Background The scalp care market is growing rapidly and research into the factors associated with sensitive scalp is performed in many countries. However, to the best of our knowledge, no previous study has examined the factors triggering sensitive scalp in Korean women. Thus, the aim of our study was to establish objective standards for sensitive scalp, investigate factors that trigger this condition, and determine the ratio of sensitive scalp in Korean women. Methods A total of 125 Korean adult women participated in the study. The participants answered the questionnaire, had their scalp temperature measured, and the sensitive scalp condition was evaluated and analyzed. Results Compared to the non‐sensitive scalp (NS) group, the sensitive scalp (SS) group had a significantly higher average temperature and increased heat sensation, dandruff, erythema in the scalp, past history of atopy, history of hair loss, medical history of scalp disease, concern for scalp care, and interest in mild products and frequency of use. The majority of participants in the SS group had a dry scalp, and itching was common. Conclusion This study may help us to understand the characteristics of the sensitive scalp in Korean females and determine factors associated with triggering a sensitive scalp.

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“…The hair cuticle is the region affected by stress caused by the external environmental and physical factors. Undamaged hair has a smooth cuticle and outer layer, while damaged hair has a dull and dry cuticle with a rough outer layer [234]. Morphological characteristics such as roughness, pores, pits, and cracks, holes, or overall severe peeling (desquamation) occur in the cuticle layers and can be observed and classified using scanning electron microscopy (SEM) [235].…”

Section: Analysis Of Different Hair Typesmentioning

confidence: 99%

Detection and Mapping of Cannabis Use in Hair Samples Using Mass Spectrometry

Beasley¹

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Hair differs from other human materials used for toxicological analysis, such as blood or urine, because of its substantially longer window of detection (months to years) enabling retrospective investigations of drug consumption. Due to its solid and durable nature, hair may be analysed centuries after growth with little degradation. Other advantages of hair analysis include the non-invasiveness of its collection, which is of particular importance in infant/child investigations and the ease of sample storage. Although hair analysis offers the potential to reveal information which is not possible with other biological matrices, it also suffers from some unique limitations that can make interpretation of findings challenging. These are largely due to exposure of hair to the environment before analysis can take place. Current analytical techniques allow detection and quantification of cannabinoids in hair samples. Frequently used techniques include gas chromatography mass spectrometry and liquid chromatography mass spectrometry. The majority of studies exclusively analyse the natural products Δ9-tetrahydrocannabinol (THC), Cannabinol (CBN), cannabidiol (CBD) or the metabolite 11-nor-9-carboxy-tetrahydrocannabinol (THC-COOH). In this thesis THC, CBD, CBN, THC-COOH and the additional metabolite 11-Hydroxydelta-9-tetrahydrocannabinol (11-OH-THC) have been simultaneously detected and quantified in authentic hair samples using a novel atmospheric pressure chemical ionisation method coupled to gas chromatography mass spectrometry. The results of these findings are compared to self-report data and are largely found to be in concordance, with some anomalies. In addition, several strategies to overcome the complication of external contamination of hair samples were trialled and compared to self-report data. In this thesis there is also an investigation presented to demonstrate the in-situ derivatisation of cannabinoids using matrix-assisted laser desorption ionisation (MALDI). This is the first time a hair has been analysed for cannabinoids using MALDI and the first example of in situ derivatisation for hair samples. The addition of an N-methylpyridium group results in improved ionisation efficiency, permitting both detection and mapping of Δ9-tetrahydrocannabinol (THC), Cannabinol (CBN), cannabidiol (CBD) and the metabolites 11-nor-9-carboxy-tetrahydrocannabinol (THC-COOH), 11-Hydroxy-delta-9-tetrahydrocannabinol (11-OH-THC) and 11-nordelta(9)-carboxy-tetrahydrocannabinol glucuronide (THC-COO-gluc) in single hair samples. Additionally, for the first time an in-source rearrangement of THC is reported and characterised in this thesis, thus contributing new knowledge in the analysis of this drug by MALDI mass spectrometry.

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Assessment of hair surface roughness using quantitative image analysis

Abstract: Background/purpose: Focus on the hair and hair cuticle is increasing. The hair cuticle

Cited by 11 publications

References 31 publications

Evaluation of human electroencephalogram change for sensory effects of fragrance

Evaluation of human electroencephalogram change for sensory effects of fragrance

Evaluation of factors triggering sensitive scalp in Korean adult women

Detection and Mapping of Cannabis Use in Hair Samples Using Mass Spectrometry

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