Article
Medicine, General & Internal
Chau Yee Ng, Tai-Ang Wang, Hsiang-Chieh Lee, Bo-Huei Huang, Meng-Tsan Tsai
Summary: Fractional laser treatment is commonly used for dermatological applications. However, observing laser-induced photodamage beneath the tissue surface in vivo is challenging. This study implemented a portable spectral-domain optical coherence tomography (SD-OCT) system to investigate the photodamage induced by CO2 and Nd:YAG lasers in real-time. The correlation between photodamage and exposure energy was analyzed, and the change in optical properties of the damaged tissue was examined. The results demonstrate the potential of OCT for non-invasive evaluation of laser-induced tissue damage and quantitative assessment.
Article
Thermodynamics
Pedro Jesus Rodriguez de Rivera, Miriam Rodriguez de Rivera, Fabiola Socorro, Manuel Rodriguez de Rivera
Summary: This study investigates the thermal probing depth of a skin calorimeter to measure the heat capacity and thermal resistance of a 4 cm2 skin region. The results show that the thermal penetration depth is mainly determined by the period of the thermal excitation. Measurements on the left wrist of a healthy 64-year-old male subject indicate that the heat capacity in both the dorsal and volar zones is of the same order of magnitude, with an initial value of 4 J/K and exponential increase up to 7 J/K over time. The thermal resistance also increases exponentially with time, ranging from 27 to 36 K/W for the volar zone and 32 to 45 K/W for the dorsal zone.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Dermatology
Emily Wenande, Anna Hastrup, Gabriella Louise Fredman, Uffe Hogh Olesen, Albert Wolkerstorfer, Merete Haedersdal
Summary: This study aimed to assess the impact of skin hydration status on microchannel dimensions generated by fractional CO2 lasers. The results showed modest differences in microchannel dimensions between hydrated, dehydrated, and control skin. However, the impact of hydration status on the thickness of the coagulation zone was limited.
LASERS IN SURGERY AND MEDICINE
(2023)
Article
Biochemistry & Molecular Biology
Paula Montero, Maria Jose Villarroel, Ines Roger, Anselm Morell, Javier Milara, Julio Cortijo
Summary: Solar radiation can lead to various negative effects on the skin, such as sunburn, inflammation, and DNA damage. One potential approach to photoprotection is by targeting the transcription factor Nrf2, and obacunone has been identified as a potent Nrf2 agonist. This study aims to evaluate the relevance of full-thickness skin models in photoprotection studies and explore the photoprotective effects of obacunone in human keratinocytes.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Thermodynamics
Mohammad Azhdari, Seyed Morteza Seyedpour, Tim Ricken, Ghader Rezazadeh
Summary: This paper investigates the temperature and vibration responses of human multi-layer skin tissue to laser irradiation. The authors use a Zener model with two relaxation times and a dual phase-lag heat conduction model to describe the temperature and displacement in a one-dimensional form. The obtained differential equations are discretized in the weak form to balance thermal and vibrational energies and solved numerically by integration over time. The effects of relaxation times and laser parameters on the behavior of the skin are examined, and the impact of phase lags on thermal response and vibration is discussed.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Plant Sciences
Xusheng Li, Chuqi Liu, Yawen Li, Kailan Yuan, Wenbao Zhang, Dongbao Cai, Ziyao Peng, Yunfeng Hu, Jianxia Sun, Weibin Bai
Summary: Anthocyanins have potential applications in cosmetics for improving skin function, but their use is limited by dye stability and sensitivity to temperature and pH variations.
PHYTOCHEMISTRY REVIEWS
(2023)
Article
Engineering, Industrial
Tatsuaki Furumoto, Yohei Hashimoto, Hisashi Ogi, Tomoya Kawabe, Mitsugu Yamaguchi, Tomohiro Koyano, Akira Hosokawa
Summary: This study investigated the separation of chemically strengthened glass using a fracture control technique, analyzing the thermal stress induced by laser beam irradiation and the impact of processing grooves. Experimental results showed that exceeding the depth of the compressive stress layer with the initial crack depth can effectively achieve crack propagation.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Optics
Cong Li, Jun Huang, Meng Zhang, Yuxin Chen, Tingting Liu, Kehong Wang
Summary: Laser assisted suture research has gained attention for its advantages, but there is a need for deeper investigation. This study explored the impact of external restraint force on laser tissue welding, analyzing its effect on the optical properties of skin tissue. Using a Nd:YAG pulse laser, experiments on skin incisions demonstrated improved absorption and suture strength under compression force. Results showed that external preloading force significantly affected tissue strength, and different forces altered the absorption rate and thickness for improved welding strength.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Medicine, Research & Experimental
Xinping Zhang, Chengan Feng, Siyu Wang, Yinglei Wang, Zhe Fu, Yingxuan Zhang, Huiling Sun, Chun Xie, Yang Fu, Jian Tao, Mingying Luo, Xinwang Yang
Summary: The peptide OM-GL15 derived from the skin of the green odorous frog showed antioxidant properties by scavenging free radicals, reducing Fe3+ to Fe2+, and alleviating UVB-induced skin photodamage. It also protected epidermal cells from UVB-induced apoptosis by inhibiting DNA damage and regulating the expression of apoptosis-related proteins. These findings suggest the potential application of amphibian skin-derived peptides for protection against UVB-induced photodamage.
BIOMEDICINE & PHARMACOTHERAPY
(2021)
Review
Food Science & Technology
Eduardo Puertolas, Izaskun Perez, Xabier Murgui
Summary: Laser food processing, especially using CO2 laser, has the potential to revolutionize the industry with its high efficiency, high-power output, and infrared wavelength. Over the past 50 years, CO2 laser has been used for various food processing applications, such as cooking, marking, cutting, and microbial surface decontamination. This review article focuses on the state of the art of CO2 laser in food processing, discussing its characteristics, mechanisms, and challenges in realizing its full potential in the agri-food sector.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2023)
Article
Biochemistry & Molecular Biology
Yocasta Martinez-Alvarado, Eduardo Amezcua-Galvez, Judith Davila-Rodriguez, Ana Sandoval-Rodriguez, Marina Galicia-Moreno, Monica Almeida-Lopez, Silvia Lucano-Landeros, Arturo Santos, Hugo Christian Monroy-Ramirez, Juan Armendariz-Borunda
Summary: Ultraviolet radiation (UV) is the main cause of skin photodamage, which leads to histological degenerative changes and non-melanoma skin cancer. Retinoids have been commonly used to treat photoaging, but their adverse effects are recognized. Pirfenidone (PFD) has shown anti-inflammatory, antifibrogenic, and antioxidant properties. In this study, topical PFD was found to effectively reduce photodamage and inflammation in a UVB-induced model, making it a promising treatment for cell photodamage in humans. Clinical trials are needed to further investigate its potential.
Article
Dermatology
Daniel P. Friedmann, Alina Timmerman, Zoya Cahana
Summary: This study evaluated the safety and efficacy of a 532-nm picosecond laser for pigmented lesions on the face and hands. The results showed that the treatment was highly effective in clearing the lesions, with minimal pain and no serious adverse events. Patient satisfaction was also high.
DERMATOLOGIC SURGERY
(2022)
Article
Thermodynamics
Mina Ghanbari, Ghader Rezazadeh
Summary: This paper investigates the transient temperature and vibration response of skin tissue to various laser heating sources, taking into account the thermoelastic effect and utilizing a reduced-order model to solve complex boundary conditions. The study shows that relaxation time delays the tissue's dynamic response and reduces vibration amplitude under repetitive laser heating. The thermoelastic coupling term has minimal impact on tissue temperature response.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Chun Xie, Yan Fan, Saige Yin, Yilin Li, Naixin Liu, Yixiang Liu, Longjun Shu, Zhe Fu, Yinglei Wang, Yue Zhang, Xiaojie Li, Ying Wang, Jun Sun, Xinwang Yang
Summary: A novel amphibian-derived peptide OS-LL11 has been found to exhibit anti-photodamage activity by maintaining skin health and protecting against UV radiation damage through various mechanisms.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2021)
Article
Dermatology
Aniqa Chowdhury, Nasim Nosoudi, Saketh Karamched, Vaideesh Parasaram, Naren Vyavahare
Summary: The combination of polyphenols with short exposure to UVA light can increase extracellular matrix deposition of elastin and collagen, potentially improving skin properties.
JOURNAL OF DERMATOLOGICAL SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
A. A. Salim, S. K. Ghoshal, G. Krishnan, H. Bakhtiar
Article
Chemistry, Physical
M. I. Rosli, M. Abdullah, G. Krishnan, S. W. Harun, M. S. Aziz
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2020)
Article
Optics
S. A. Jupri, S. K. Ghoshal, N. N. Yusof, M. F. Omar, K. Hamzah, G. Krishnan
OPTICS AND LASER TECHNOLOGY
(2020)
Article
Instruments & Instrumentation
Aneez Syuhada, Muhammad Salleh Shamsudin, Suzairi Daud, Ganesan Krishnan, Sulaiman Wadi Harun, Muhammad Safwan Abd Aziz
Summary: A sensitive tapered optical fiber sensor incorporating graphene oxide and polyvinyl alcohol composite film for rapid measurement of changes in relative humidity was proposed and experimentally demonstrated. The sensor showed a good response with its signal increasing linearly with the surrounding humidity, achieving the highest sensitivity with a specific coating. The study also measured and analyzed the stability, repeatability, reversibility, and response time of the designated sensor.
Article
Engineering, Electrical & Electronic
A. A. A. Jafry, G. Krishnan, N. Kasim, N. F. Zulkipli, F. S. M. Samsamnun, R. Apsari, S. W. Harun
OPTICAL FIBER TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Amir Reza Sadrolhosseini, Ganesan Krishnan, Suhaidi Safie, Mahnoush Beygisangchin, Suraya Abdul Rashid, Sulaiman Wadi Harun
OPTICAL MATERIALS EXPRESS
(2020)
Article
Chemistry, Physical
M. I. Rosli, N. Basar, N. Mohd Rozi, G. Krishnan, S. W. Harun, E. S. Sazali, M. S. Aziz
Summary: This study aimed to determine the nonlinear optical response of extracted alpha-mangostin using various characterization techniques. The results showed that the alpha-mangostin exhibited a self-defocusing effect at an excitation wavelength of 532 nm, with recorded nonlinear refractive index values compared to theoretical fitting curves. The study successfully captured the nonlinear refraction of alpha-mangostin, showcasing its unique NLO characteristics.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Optics
A. A. Salim, H. Bakhtiar, G. Krishnan, S. K. Ghoshal
Summary: In this study, gold/silver-integrated cinnamon shell structures were fabricated using a nanosecond pulse laser ablation method and their properties were systematically characterized. The structures exhibited strong fluorescence, high absorbance in UV-Vis range, and high thermal stability, showing potential for biomedical and bioelectronic applications.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Sok Teng Lee, Wan M. Khairul, Oon Jew Lee, Rafizah Rahamathullah, Adibah Izzati Daud, Ku Halim Ku Bulat, Suhaila Sapari, Fazira I. Abdul Razak, Ganesan Krishnan
Summary: This study successfully designed and synthesized two fused-aromatic chalcones, analyzed their optical and thermal properties, and found that they exhibit potential excellent performance in optoelectronic manufacturing. The theoretical and experimental results complement each other, demonstrating the significance of these compounds in the development of optoelectronic materials.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Optics
Mundzir Abdullah, M. S. Aziz, Ganesan Krishnan, Fauzan Ahmad, Sabah M. Mohammad, Ibrahim Abdul Razak, Sulaiman Wadi Harun
Summary: This study characterized the third-order nonlinear optical response of Clitoria ternatea petal's dye in various solvents using the Z-scan technique. The results showed that the dye exhibited self-defocusing and reverse saturable absorption effects, making it a potential candidate for applications such as optical limiting and switching.
Article
Engineering, Electrical & Electronic
A. A. Salim, S. K. Ghoshal, M. S. Shamsudin, Muhammad Izz Rosli, M. S. Aziz, S. W. Harun, G. Krishnan, H. Bakhtiar
Summary: The new RB-CNPs prepared via PLAL method at various laser fluences showed different absorption, fluorescence, and color properties, with prominent peaks in their spectra and a range of fluorescence lifetime and quantum yield. The RB-CNPs coated fiber-optic sensor exhibited fast response to ethylene glycol medium, making them suitable for environmental tracers and optical probes.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Multidisciplinary
Muhammad Safwan Aziz, Shumaila Islam, Muhammad Izz Rosli, Norazah Basar, Ganesan Krishnan, Maisarah Duralim, Sulaiman Wadi Harun
Summary: The study reports the nonlinear optical properties of two Coumarin-based compounds using the Z-scan technique. The traditional C500 compound exhibited NLR properties, while the synthesized C3 compound showed NLR and NLA properties. Both compounds demonstrated excellent nonlinear optical characteristics at different laser powers.
CURRENT APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Abdul Waheed Aman, Muhammad Firdaus Omar, Alireza Samavati, Ganesan Krishnan
Summary: Pure silver and silver alloy nanoparticles have significant applications due to their intense and tunable SPR bands in the visible region. The presence of copper atoms in the composite crystal structure of the alloy nanoparticles leads to a slight redshift in the SPR peak wavelength compared to pure silver nanoparticles.
Article
Materials Science, Multidisciplinary
M. I. Rosli, M. S. Aziz, M. Abdullah, G. Krishnan, N. Basar, S. W. Harun, R. Awang, F. S. Omar
Summary: This study investigates the nonlinear optical properties of Malachite green (MG) and Light green SF yellowish (LGSF) chromophores, including nonlinear refraction and nonlinear absorption. The presence of linear absorptions at 532 nm for both chromophores is essential for the emergence of nonlinear absorption phenomena. Intermolecular charge transfer of the it-bonds was confirmed by FTIR analysis, which contributes to the observed nonlinearities under the utilized laser power. Both MG and LGSF chromophores exhibit reverse saturable absorption (RSA) and self-defocusing effect (-n2), indicating their potential for various optical applications.
Article
Biochemistry & Molecular Biology
Nurul Farhana Jufri, Tharshini Salyam, Farah Wahida Ibrahim, Dharrshine Yoganathan, Asmah Hamid, Mazlyzam Abdul Latif, Siti Nurdiyana Mohd Saleh, Nor Atikah Safirah Juhari
Summary: The study aimed to measure the cellular changes in human brain endothelial cells (HBECs) caused by lysosomal dysfunction. The results showed that inhibition of lysosome led to increased expression of proteins related to endothelial function. This study provides insight into the importance of lysosomal function for maintaining HBECs homeostasis.
TURKISH JOURNAL OF BIOCHEMISTRY-TURK BIYOKIMYA DERGISI
(2023)
