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https://www.readbyqxmd.com/read/29448653/self-powered-sensors-and-flexible-triboelectric-nanogenerator-for-powering-portable-electronics
#1
Piyush Kanti Sarkar, Subrata Maji, Somobrata Acharya
We report on a flexible triboelectric nanogenerator (FTENG) designed using polydimethylsiloxane (PDMS) and aluminium (Al) combinations to convert ambient mechanical energy into electrical outputs. An open-circuit output voltage of ~40 V and short-circuit current density of ~63.6 mA m-2 with power density 0.62 W m-2 was easily obtained from the FTENG. The harvested mechanical energy is used for lighting ~100 light emitting diodes and to operate seven segment display enabling prospects for carbon-emission free environment friendly source for powering portable electronic devices...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29369396/current-developments-in-phototherapy-for-psoriasis
#2
REVIEW
Akimichi Morita
Phototherapy utilizes the beneficial effects of ultraviolet (UV) wavelengths to affect immunoregulatory functions. UV light phototherapy using narrowband UV-B (NB-UVB) and bath-psoralen UV-A (bath-PUVA) therapy are well-established treatments for psoriasis. Dual-action mechanisms of UV phototherapy have been identified: apoptosis and immune suppression. NB-UVB depletes pathogenic T cells by inducing apoptosis and regulatory T cells. Other wavelengths are also utilized for phototherapy, namely 308-nm excimer light and 312-nm flat-typed NB-UVB...
January 25, 2018: Journal of Dermatology
https://www.readbyqxmd.com/read/29356026/light-emitting-diodes-in-dermatology-a-systematic-review-of-randomized-controlled-trials
#3
Jared Jagdeo, Evan Austin, Andrew Mamalis, Christopher Wong, Derek Ho, Daniel Siegel
OBJECTIVE: In dermatology, patient and physician adoption of light-emitting diode (LED) medical technology continues to grow as research indicates that LEDs may be used to treat skin conditions. The goal of this systematic review is to critically analyze published randomized controlled trials (RCTs) and provide evidence-based recommendations on the therapeutic uses of LEDs in dermatology based on published efficacy and safety data. METHODS: A systematic review of the published literature on the use of LED treatments for skin conditions was performed on September 13th 2017...
January 22, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29348898/avoiding-thermal-injury-during-near-infrared-photoimmunotherapy-nir-pit-the-importance-of-nir-light-power-density
#4
Shuhei Okuyama, Tadanobu Nagaya, Fusa Ogata, Yasuhiro Maruoka, Kazuhide Sato, Yuko Nakamura, Peter L Choyke, Hisataka Kobayashi
Near-infrared photoimmunotherapy (NIR-PIT) is a newly-established cancer treatment which employs the combination of an antibody-photoabsorber conjugate (APC) and NIR light. When NIR light is absorbed by APC-bound tissues, a certain amount of heat is generated locally. For the most part this results in a subclinical rise in skin temperature, however, excessive light exposure may cause non-specific thermal damage. In this study, we investigated the potential for thermal damage caused by NIR-PIT by measuring surface temperature...
December 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29295735/photodynamic-therapy-interventions-in-facial-photodamage-a-systematic-review
#5
G Sanclemente, V Ruiz-Cañas, J M Miranda, A P Ferrín, P A Ramirez, G N Hernandez
INTRODUCTION: Photodynamic therapy (PDT) involves the combination of a light source and a photosensitizing agent to induce tissue damage via the generation of singlet oxygen. Although topical PDT has been approved for other indications, its use in facial photodamage is uncertain. AIMS: To assess the efficacy and safety of PDT in facial skin photoaging. METHODS: All randomized clinical trials (RCTs) evaluating the efficacy and safety of any form of topical PDT for the treatment of facial photodamage (dermatoheliosis) or photoaging in patients older than 18 years, were included...
December 30, 2017: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/29289704/contribution-of-photodynamic-therapy-in-wound-healing-a-systematic-review
#6
REVIEW
Vanessa Nesi-Reis, Daniele Stéfanie Sara Lopes Lera-Nonose, Jully Oyama, Marielle Priscila Paula Silva-Lalucci, Izabel Galhardo Demarchi, Sandra Mara Alessi Aristides, Jorge Juarez Vieira Teixeira, Thaís Gomes Verzignassi Silveira, Maria Valdrinez Campana Lonardoni
OBJECTIVE: We researched articles that used photodynamic therapy (PDT) in skin wound healing in humans. METHODS: The systematic review was conducted throughout scientific articles that investigated the action of PDT on wound healing in humans, published from July 2005 to March 2017, in the data bases PubMed and LILACS. RESULTS: The main types of wound described in selected articles in this review were chronic ulcer, non-melanoma skin cancer...
December 28, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29242907/skin-intrinsic-fluorescence-and-age-related-macular-degeneration-the-beaver-dam-eye-study
#7
Ronald Klein, Kristine E Lee, John D Maynard, Stacy M Meuer, Ronald E Gangnon, Barbara E K Klein
Purpose: To determine if skin intrinsic fluorescence (SIF), a noninvasive measure of advanced glycation endproducts and oxidative stress in skin is associated with AMD. Methods: SIF was measured with the SCOUT DS skin fluorescence spectrometer in a cross-sectional cohort study of 969 persons aged 68 to 102 years from the 1181 who participated in the 25-year follow-up examination in the Beaver Dam Eye Study (BDES) in 2014 to 2016. The SCOUT DS skin fluorescence spectrometer uses five light-emitting diodes, centered at 375 nm to 456 nm...
December 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29200774/therapeutic-effects-of-a-light-emitting-diode-at-a-variety-of-wavelengths-on-atopic-dermatitis-like-skin-lesions-in-nc-nga-mice
#8
Eun Ah Cho, Ye Jin Lee, Yun Hee Ryu, Ju Hee Han, Ji Hyun Lee, Young Min Park
No abstract text is available yet for this article.
December 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/29156237/skeleton-skin-structured-rgo-cnts-pani-composite-fiber-electrodes-with-excellent-mechanical-and-electrochemical-performance-for-all-solid-state-symmetric-supercapacitors
#9
Dong Liu, Pengcheng Du, Wenli Wei, Hongxing Wang, Qi Wang, Peng Liu
Polyaniline coated reduced graphene oxide/carbon nanotube composite fibers ((RGO/CNTs)@PANI, RCP) with skeleton/skin structure are designed as fiber-shaped electrodes for high performance all-solid-state symmetric supercapacitor. The one-dimensional reduced graphene oxide/carbon nanotube composite fibers (RGO/CNTs, RC) are prepared via a simple in-situ reduction of graphene oxide in presence of carbon nanotubes in quartz glass pipes, which exhibit excellent mechanical performance of >193.4 MPa of tensile strength...
November 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29120857/the-safety-and-efficacy-of-light-emitting-diodes-based-ultraviolet-a1-phototherapy-in-bleomycin-induced-scleroderma-in-mice
#10
Diana Karpec, Romualdas Rudys, Laima Leonaviciene, Zygmunt Mackiewicz, Ruta Bradunaite, Gailute Kirdaite, Algirdas Venalis
PURPOSE: To define the efficacy and safety of narrowband ultraviolet A1 (UVA1) for the treatment of dermal fibrosis in bleomycin-induced mouse model of scleroderma. MATERIALS AND METHODS: 42 DBA/2 strain mice were included in the study: healthy mice and mice with established scleroderma, treated with high or medium dose of UVA1. Non-treated groups served as control. The equipment emitting 365±5nm UVA1 radiation was used in the study. The average cumulative doses were 1200J/cm2 for high and 600J/cm2 for medium dose course...
November 6, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/29071035/a-comparative-study-of-660-nm-low-level-laser-and-light-emitted-diode-in-proliferative-effects-of-fibroblast-cells
#11
Mina Sadat Naderi, Mohammadreza Razzaghi, Gholamreza Esmaeeli Djavid, Zahra Hajebrahimi
Introduction: In recent years, low-power lasers have been widely used in medicine. With the introduction of affordable light emitted diode (LED), clinical application of LED light has become more and more popular. However, some researchers believe that due to lack of coherence of the LED light, it can be different in terms of biological effects, in comparison with laser. In this study, the biological effects of low-level laser (LLL) to those of LED light are compared and discussed. Methods: Human skin fibroblast cell line Hu02 was irradiated with LLL and LED light with a wavelength of 660 nm, power output of 35 mW and in continuous mode and the control group was not irradiated...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29067616/a-clinical-review-of-phototherapy-for-psoriasis
#12
REVIEW
Ping Zhang, Mei X Wu
Psoriasis is an autoimmune inflammatory skin disease. In the past several decades, phototherapy has been widely used to treat stable psoriatic lesions, including trunk, scalp, arms and legs, and partial nail psoriasis. A variety of light/lasers with different mechanisms of action have been developed for psoriasis including ultraviolet B (UVB), psoralen ultraviolet A (PUVA), pulsed dye laser (PDL), photodynamic therapy (PDT), intense pulsed light (IPL), light-emitting diodes (LED), and so on. Because light/laser each has specific therapeutic and adverse effects, it is important to adequately choose the sources and parameters in management of psoriasis with different pathogenic sites, severities, and duration of the disorder...
October 24, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29065997/light-emitting-diode-585nm-photomodulation-inhibiting-melanin-synthesis-and-inducing-autophagy-in-human-melanocytes
#13
Li Chen, Zhongyi Xu, Min Jiang, Chengfeng Zhang, Xuan Wang, Leihong Xiang
BACKGROUND: Melasma is a common hyperpigmentation skin disease on face. Light-emitting diode (LED) photomodulation (585nm) is reported to be effective for the treatment of melasma. However, whether and how LED photomodulation would influence melanogenesis of human epidermal melanocytes (HEMs) is unknown. OBJECTIVE: To evaluate the effects of LED photomodulation (585nm) on melanogenesis in HEMs. METHODS: HEMs were irradiated with fluences of 0, 5, 10 and 20J/cm2 585nm LED light...
October 11, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29060666/a-wearable-eeg-based-massage-headband-for-anxiety-alleviation
#14
M Nair Chaitanya, Sharmila Jayakkumar, Edwin Chong, C H Yeow
In this work, we would like to discuss our findings obtained from the newly proposed hardware design for anxiety detection and its mitigation where a subject's state of mind is identified from the neurological data retrieved. A feedback-based network implemented for stress alleviation mainly comprises of a pair of massage motors and RGB light-emitting diode (LED) that activate during conditions of stress detected, a custom-made Electroencephalography (EEG)-sensor and a massage motor circuit both functioning on an Arduino driven platform...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28986000/the-effect-of-light-emitting-diode-590-830%C3%A2-nm-based-low-level-laser-therapy-on-posttraumatic-edema-of-facial-bone-fracture-patients
#15
Woo Yeol Baek, Il Hwan Byun, In Sik Yun, Jae Yoon Kim, Tai Suk Roh, Dae Hyun Lew, Young Seok Kim
PURPOSE: Posttraumatic edema in facial bone fracture patients may interfere with the operation field and delay the schedule. Thus, swiftly reducing the edema alleviates patient discomfort and advances the operation date. Ice packing and compression bandages are often used for such a purpose, but such methods are often inconvenient for the face. In this study, we aim to analyze the effect of light-emitting diode (LED) (590/830 nm)-based low-level laser therapy (LLLT) in posttraumatic edema in facial bone fracture patients...
September 2, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28931040/newborn-skin-reflection-proof-of-concept-for-a-new-approach-for-predicting-gestational-age-at-birth-a-cross-sectional-study
#16
Zilma Silveira Nogueira Reis, Gabriela Luiza Nogueira Vitral, Ingrid Michelle Fonseca de Souza, Maria Albertina Santiago Rego, Rodney Nascimento Guimaraes
BACKGROUND: Current methods to assess the gestational age during prenatal care or at birth are a global challenge. Disadvantages, such as low accessibility, high costs, and imprecision of clinical tests and ultrasonography measurements, may compromise health decisions at birth, based on the gestational age. Newborns' organs and tissues can indirectly indicate their physical maturity, and we hypothesized that evolutionary changes in their skin, detected using an optoelectronic device meter, may aid in estimating the gestational age...
2017: PloS One
https://www.readbyqxmd.com/read/28904394/ultraviolet-b-light-emitting-diodes-leds-are-more-efficient-and-effective-in-producing-vitamin-d3-in-human-skin-compared-to-natural-sunlight
#17
T A Kalajian, A Aldoukhi, A J Veronikis, K Persons, M F Holick
Vitamin D, the sunshine vitamin is important for health. Those with fat malabsorption disorders malabsorb vitamin D and thus must rely on cutaneous production of vitamin D3. Vitamin D3 is generated secondary to exposure to ultraviolet B (UVB) radiation (whether from the sun or from an artificial source). Light emitting diodes (LEDs) have been developed to emit ultraviolet radiation. Little is known about the efficiency of UVB emitting LEDs tuned to different wavelengths for producing vitamin D3 in human skin...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28837773/wearable-electrocardiogram-monitor-using-carbon-nanotube-electronics-and-color-tunable-organic-light-emitting-diodes
#18
Ja Hoon Koo, Seongjin Jeong, Hyung Joon Shim, Donghee Son, Jaemin Kim, Dong Chan Kim, Suji Choi, Jong-In Hong, Dae-Hyeong Kim
With the rapid advances in wearable electronics, the research on carbon-based and/or organic materials and devices has become increasingly important, owing to their advantages in terms of cost, weight, and mechanical deformability. Here, we report an effective material and device design for an integrative wearable cardiac monitor based on carbon nanotube (CNT) electronics and voltage-dependent color-tunable organic light-emitting diodes (CTOLEDs). A p-MOS inverter based on four CNT transistors allows high amplification and thereby successful acquisition of the electrocardiogram (ECG) signals...
October 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28833644/ultrathin-quantum-dot-display-integrated-with-wearable-electronics
#19
Jaemin Kim, Hyung Joon Shim, Jiwoong Yang, Moon Kee Choi, Dong Chan Kim, Junhee Kim, Taeghwan Hyeon, Dae-Hyeong Kim
An ultrathin skin-attachable display is a critical component for an information output port in next-generation wearable electronics. In this regard, quantum dot (QD) light-emitting diodes (QLEDs) offer unique and attractive characteristics for future displays, including high color purity with narrow bandwidths, high electroluminescence (EL) brightness at low operating voltages, and easy processability. Here, ultrathin QLED displays that utilize a passive matrix to address individual pixels are reported. The ultrathin thickness (≈5...
August 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28755402/combination-of-a-2940%C3%A2-nm-er-yag-laser-with-recombinant-bovine-basic-fibroblast-growth-factor-rb-bfgf-and-light-emitting-diode-red-light-led-rl-for-the-treatment-of-striae-alba-a-pilot-study
#20
Jie Shen, Xin-Gang Lu, Jing-Jing Jin, Hong-Wei Wang
BACKGROUND: Striae distensae (SD) are a common dermatologic problem that plagues many people. Although there are many therapeutic modalities have been used to treat SD, effective method has been disappointing for striae Alba. AIMS: To evaluate the clinical and histopathologic efficacy and safety of the 2940-nm erbium yttrium aluminum garnet (Er:YAG) ablative fractional laser (AFL) with recombinant bovine basic fibroblast growth factor (rb-bFGF) and light-emitting diode-red light (LED-RL) for the treatment of striae alba...
July 29, 2017: Journal of Cosmetic Dermatology
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