Read by QxMD icon Read

Light quality

Jing-Jie Liu, Xiao-Yan Ding, Li Xiang, Feng Zhao, Sheng-Li Huang
This study aimed to establish a model to closely mimic spinal cord hypoxic-ischemic injury with high production and high reproducibility. Fourteen-day cultured organotypic spinal cord slices were divided into 4 groups: control (Ctrl), oxygen glucose deprived for 30min (OGD 30min), OGD 60min, and OGD 120min. The Ctrl slices were incubated with 1ml propidium iodide (PI) solution (5μg/ml) for 30minutes. The OGD groups were incubated with 1ml glucose-free DMEM/F12 medium and 5μl PI solution (1mg/ml) for 30min, 60min and 120min, respectively...
October 17, 2017: Brain Research Bulletin
Kheng Yong Ong, Wing Lam Chung, Kaysar Mamun, Li Li Chen
Even while pharmacy practice evolves to a more patient-centric mode of practice, local hospitals, due to high patient load as well as space and resource constraints, find it challenging to conduct thorough medication review and physical medication reconciliation for all patients. In light of this, optimizing the local current healthcare system to involve community pharmacists in the care of patients from public hospitals could potentially better cater to the healthcare needs of the older population. Due to easy accessibility, community pharmacies are often the first point of contact in the healthcare system...
October 13, 2017: Research in Social & Administrative Pharmacy: RSAP
Amanda H Costello, Natalie J Shook, Nancy M Wallace, Cheryl B McNeil
Child maltreatment remains a serious public health issue in the United States. Therefore, it is important to engage in quality control of the assessment, prevention, and treatment services for families affected by maltreatment. Parenting capacity assessments (PCAs) are typically an integral part of service delivery for families affected by maltreatment and can carry serious consequences for the referred parent. The Child Abuse Potential Inventory (CAPI) is a measure that is widely used in PCAs; however, socially desirable responding on the CAPI can serve to invalidate the important information derived from this assessment, as well as lead to negative impressions of the parent...
October 17, 2017: Child Abuse & Neglect
J M Caliva, J M Kembro, S Pellegrini, D A Guzman, R H Marin
Aggressive behaviors can affect both animal welfare and productivity. Because the expression of aggressive behaviors is dependent on the quality of the opponent, they reflect relative rather than absolute levels of underlying aggressiveness. This study was aimed to characterize the aggressive responsiveness of photostimulated (14:10 h light:dark photoperiod) adult Japanese quail when interacting with a photocastrated (6:18 h light:dark photoperiod) counterpart in a novel test environment and to assesses interindividual variations...
October 10, 2017: Poultry Science
V M Dos Santos, B S L Dallago, A M C Racanicci, Â P Santana, F E M Bernal
This research aims to evaluate the microclimate of commercial loads of broiler chickens at different distances in the summer (rainy) and winter (dry) seasons and their effects on meat quality. Twelve broiler loads were monitored with a total of 24 crates per load. Data loggers were used to record temperature and relative humidity. The experiment followed a completely randomized design with 48 treatments in a factorial scheme (2 seasons: rainy and dry) x 2 (distances: short and long) x 12 (positions), with 3 replicates per experimental group...
October 10, 2017: Poultry Science
Miguel A Hernández-Prieto, Yaqiong Li, Bradley L Postier, Robert E Blankenship, Min Chen
Light quantity and quality promotes ecological-niche differentiation of photosynthetic organisms. The existence of cyanobacteria capable of performing photosynthesis using red-shifted chlorophylls, chlorophyll d and f, reduces competition between species in light-limiting environments, and permits them to thrive in niches enriched in far-red light. We examined global transcriptome changes due to changing the culture light conditions in Acaryochloris marina, a chlorophyll d-containing cyanobacterium. We identified the functional category of "photosynthesis" as the most down-regulated and the category of "cell wall/membrane biogenesis" as the most up-regulated through a functional enrichment analysis of genes differentially expressed...
October 20, 2017: Environmental Microbiology
Xu Chen, Wen Xu, Yandong Jiang, Gencai Pan, Donglei Zhou, Jinyang Zhu, He Wang, Cong Chen, Dongyu Li, Hongwei Song
Fabrication of near-infrared light-triggered photoelectrochemical (PEC) sensors based on the upconversion nanophosphors (UCNPs) is a novel approach, which exhibits the advantages of low background signal and non-damage to the biological substance as well as high sensitivity and improved electric detection in PEC sensors. Herein we demonstrate the preparation of novel and high-quality ZnO inverse opal photonic crystals (IOPCs)/Ag/NaYF4:Yb,Tm hybrid films by different advanced film techniques, including colloidal self-assembling, vapor phase deposition and pulsed laser deposition and its application to sensitive detection of alpha-fetoprotein (AFP)...
October 20, 2017: Nanoscale
Xuelei Lai, Harry J Wichers, Montserrat Soler-Lopez, Bauke W Dijkstra
Melanin is the main pigment responsible for the colour of human skin, hair and eye. Its biosynthesis requires three melanogenic enzymes, tyrosinase (TYR), and the tyrosinase-related proteins TYRP1 and TYRP2. The difficulty of isolating pure and homogeneous proteins from endogenous sources has hampered their study, and resulted in many contradictory findings regarding their physiological functions. In this review, we summarize recent advances on the structure and function of TYR and TYRPs by virtue of the crystal structure of human TYRP1, which is the first available structure of a mammalian melanogenic enzyme...
October 20, 2017: Chemistry: a European Journal
Jared A Forrester, Nicholas J Boyd, J Edward F Fitzgerald, Iain H Wilson, Abebe Bekele, Thomas G Weiser
BACKGROUND: Safe surgery requires high-quality, reliable lighting of the surgical field. Little is reported on the quality or potential safety impact of surgical lighting in low-resource settings, where power failures are common and equipment and resources are limited. METHODS: Members of the Lifebox Foundation created a novel, non-mandatory, 18-item survey tool using an iterative process. This was distributed to surgical providers practicing in low-resource settings through surgical societies and mailing lists...
October 19, 2017: World Journal of Surgery
Ki Seok Kim, Ki Hyun Kim, You Jin Ji, Jin Woo Park, Jae Hee Shin, Albert Rogers Ellingboe, Geun Young Yeom
Depositing a barrier film for moisture protection without damage at a low temperature is one of the most important steps for organic-based electronic devices. In this study, the authors investigated depositing thin, high-quality SiNx film on organic-based electronic devices, specifically, very high-frequency (162 MHz) plasma-enhanced chemical vapor deposition (VHF-PECVD) using a multi-tile push-pull plasma source with a gas mixture of NH3/SiH4 at a low temperature of 80 °C. The thin deposited SiNx film exhibited excellent properties in the stoichiometry, chemical bonding, stress, and step coverage...
October 19, 2017: Scientific Reports
Xuefeng Jiang, Linbo Shao, Shu-Xin Zhang, Xu Yi, Jan Wiersig, Li Wang, Qihuang Gong, Marko Lončar, Lan Yang, Yun-Feng Xiao
The law of momentum conservation rules out many desired processes in optical microresonators. We report broadband momentum transformations of light in asymmetric whispering gallery microresonators. Assisted by chaotic motions, broadband light can travel between optical modes with different angular momenta within a few picoseconds. Efficient coupling from visible to near-infrared bands is demonstrated between a nanowaveguide and whispering gallery modes with quality factors exceeding 10 million. The broadband momentum transformation enhances the device conversion efficiency of the third-harmonic generation by greater than three orders of magnitude over the conventional evanescent-wave coupling...
October 20, 2017: Science
Mary G Carey, Aksana N Baldzizhar, Cindy R Miterko, Brandon W Qualls, Rebecca L Vincent, Russel Merrick, Grace E Dean
OBJECTIVE: Firehouse alarms are so loud they cause a systemic response, similar to the flight-or-flight response. The purpose of the study was to reduce firehouse environmental stimuli to improve sleep quality and, thus, reduce cardiac burden. METHODS: The intervention included: restricted unnecessary fire alarms, reduced light levels, and regulated temperature in the bunkroom. RESULTS: Among 24 firefighters, 11 completed the matched post-assessment...
October 18, 2017: Journal of Occupational and Environmental Medicine
Xiaohui Shi, Hengxing Li, Yanfeng Bai, Xiquan Fu
The influence of detector noise on ghost imaging (GI) is investigated at low light levels. Based on the characteristics of the additive detector noise, we establish the analytical model and display the ghost images through numerical and experimental demonstrations. It is shown that the contrast-to-noise ratio and visibility of reconstructed images are sharply affected by the detector noise. Following the increase of the ratio of average signal intensity to the average noise, the quality of reconstructions is enhanced...
September 10, 2017: Applied Optics
Jingtao Dong
Inspection of defects with micrometer level on large aperture surfaces with hundreds of millimeters is one of the challenges in surface quality evaluation. Various microscopic imaging methods have been applied to inspecting the surface defects, while they are time-consuming for the small field of view and the sub-aperture stitching. To tackle this problem, a high-speed line scanning system based on the dark-field laser scattering method is proposed. The laser beam is scanned by the rotating polygon mirror to a laser line for high throughput and then the telecentric F-theta lens converges each incoming laser beam to a focused spot that creates a high intensity to enhance the signal-to-noise ratio...
September 1, 2017: Applied Optics
Pingli Han, Fei Liu, Kui Yang, Jinyu Ma, Jianjun Li, Xiaopeng Shao
Underwater imaging is a promising but challenging topic due to the scattering particles in water, which result in serious light attenuation. Therefore, underwater images suffer from low-contrast and low-resolution issues. In this study, in order to recover high-quality underwater images, the point spread functions (PSFs) are estimated by a slant-edge method. The experiment modulates the illumination source to deal with backscattering and the imager to take two images in orthogonally polarized states. This imaging method benefits the satisfactory edge extraction...
August 10, 2017: Applied Optics
Junming Dong, Yanyu Zhang, Yijun Zhu
Visible light communications (VLC) using multi-color light-emitting diodes (LEDs) can support simultaneous high-speed data rate and high-quality lighting. However, since the radiation spectrum of LEDs has a limited width, spectral overlapping will result in multi-color cross talk even when optical filters are applied at the receivers. Moreover, since LEDs are used for illumination and wireless data transmission in the meantime, both lighting quality and communication performance must be considered in VLC systems...
August 10, 2017: Applied Optics
Miguel A Porras, Isabel Gonzalo, M Ahmir Malik
We introduce a novel approach for the characterization of the quality of a laser beam that is not based on particular criteria for beam width definition. The Lorenz curve of a light beam is a sophisticated version of the so-called power-in-the-bucket curve, formed by the partial sums of discretized joint intensity distribution in the near and far fields, sorted in decreasing order. According to majorization theory, a higher Lorenz curve implies that all measures of spreading in phase space, and, in particular, all Rényi (and Shannon) entropy-based measures of the beam width products in near and far fields, are unanimously smaller, providing a strong assessment of a better beam quality...
August 1, 2017: Applied Optics
Tao Zhao, Juan Liu, Xinhui Duan, Qiankun Gao, Junyi Duan, Xin Li, Yongtian Wang, Weishu Wu, Rongjun Zhang
The liquid crystal spatial light modulator (SLM) is able to provide flexible wavefront control, whereas the initial phase and its response distortions will heavily influence the modulation accuracy. The currently existing calibration methods are tedious and time consuming. A novel multi-region calibration method for minimizing those distortions is proposed. The entire panel is divided into several local regions based on the similarity of phase response characteristic. The nonlinear phase response and static phase distortion of each local region are calibrated in the iterative division procedure...
August 1, 2017: Applied Optics
Anatoly M Smolovich, Valery Chernov
Novel optical elements containing semitransparent wavelike films embedded into the bulk of transparent material, which form a reflection image without transmitted light distortion, are studied. The dynamic theory of light diffraction by a locally periodic multilayer semitransparent wavelike film is developed. A simple analytical formula for near Bragg diffraction order intensity is obtained for the case when only one diffraction order lies within the hologram angular selectivity. The phase modulation of light transmitted through the optical element containing wavelike films is estimated for single-layer and multilayer wavelike films with an arbitrary shape of surface...
August 1, 2017: Applied Optics
Pengqiang Jiang, Yang Peng, Yun Mou, Hao Cheng, Mingxiang Chen, Sheng Liu
In this paper, we propose a thermally stable multi-color phosphor-in-glass (PiG) for chromaticity-tunable white light-emitting diodes (WLEDs). The multi-color PiG has a red, green, and blue (RGB) phosphor glass layer, which was screen-printed and co-sintered on a glass plate with a low temperature of 600°C. The WLED with ultra-compact structure was fabricated by the RGB-PiG directly bonded on a flip-chip ultraviolet (UV) LED. By controlling the weight ratio of R∶G∶B phosphors, the thickness of the RGB layer, and the weight ratio of phosphors to glass powders (PtG), the chromaticity of RGB-PiG based WLEDs can be effectively tuned with high color quality...
October 1, 2017: Applied Optics
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"