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Journal articles on the topic 'Ultra-low intensity light stimul'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Yu, Yue, Zhanming Li, Zhengtao Zhong, et al. "Effect of Monochromatic Green LED Light Stimuli During Incubation on Embryo Growth, Hatching Performance, and Hormone Levels." Transactions of the ASABE 61, no. 2 (2018): 661–69. http://dx.doi.org/10.13031/trans.12485.

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Abstract. Previous research indicated improvement of incubation by light stimuli. However, the light source arrangement, usually with irradiation from top to bottom, was inconvenient and high in cost. Among the different light colors, the effects of green LED light stimuli during embryo development were inconclusive. In this study, two LED lamps were installed on both sides of egg trays, and the irradiation was directed from the edges to the middle. The effect of green LED light with various light intensities was investigated. A total of 1408 broiler eggs were randomly allocated to high light

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Kast, Richard E., Anton P. Kast, Jürgen Arnhold, et al. "Noninvasive Ultra Low Intensity Light Photodynamic Treatment of Glioblastoma with Drug Augmentation: LoGlo PDT Regimen." Brain Sciences 14, no. 12 (2024): 1164. http://dx.doi.org/10.3390/brainsci14121164.

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This paper presents the basis for LoGlo PDT, a new treatment for glioblastoma. Glioblastoma is currently treated with maximal safe resection, temozolomide, and ionizing irradiation. Mortality in 2024 remains over 80% within several years from diagnosis. Oral 5-aminolevulinic acid (5-ALA) is an FDA/EMA approved drug that is selectively taken up by malignant cells, including by glioblastoma. In photodynamic treatment of glioblastoma, intense intraoperative light causes glioblastoma tissue that has taken up 5-ALA to generate cytotoxic reactive oxygen species. The requirement for intense light flu

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Zhan, Ziheng, Lei Chen, Huigao Duan, Yiqin Chen, Min He, and Zhaolong Wang. "3D printed ultra-fast photothermal responsive shape memory hydrogel for microrobots." International Journal of Extreme Manufacturing 4, no. 1 (2021): 015302. http://dx.doi.org/10.1088/2631-7990/ac376b.

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Abstract Hydrogels with stimuli-responsive capabilities are gaining more and more attention nowadays with prospective applications in biomedical engineering, bioelectronics, microrobot, etc. We develop a photothermal responsive hydrogel based on N-isopropylacrylamide that achieved a fast and reversible deformation manipulated only by near-infrared (NIR) light. The hydrogel was fabricated by the projection micro stereolithography based 3D printing technique, which can rapidly prototype complex 3D structures. Furthermore, with the variation of the grayscale while manufacturing the hydrogel, the

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Mellor, H. E., and J. G. C. Hamilton. "Navigation of Lutzomyia longipalpis (Diptera: Psychodidae) under dusk or starlight conditions." Bulletin of Entomological Research 93, no. 4 (2003): 315–22. http://dx.doi.org/10.1079/ber2003248.

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AbstractThe responses of male and female Lutzomyia longipalpis (Lutz & Neiva) to different wavelengths of light was tested by presenting the sandflies with two light sources simultaneously, a series of test wavelengths between 350–670 nm and a 400 nm control. To test whether L. longipalpis could discriminate between the test and control, three sets of experiments were carried out in which the test wavelengths were presented at higher, equivalent or lower intensity than the control. In all three experiments, ultra-violet (350 nm) and blue-green-yellow (490–546 nm) light was more attractive

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Mei, Jie, Jincan Che, Yunzhu Shi, Yudian Fang, Rongling Wu, and Xuli Zhu. "Mapping the Influence of Light Intensity on the Transgenerational Genetic Architecture of Arabidopsis thaliana." Current Issues in Molecular Biology 46, no. 8 (2024): 8148–69. http://dx.doi.org/10.3390/cimb46080482.

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Light is a crucial environmental factor that influences the phenotypic development of plants. Despite extensive studies on the physiological, biochemical, and molecular mechanisms of the impact of light on phenotypes, genetic investigations regarding light-induced transgenerational plasticity in Arabidopsis thaliana remain incomplete. In this study, we used thaliana as the material, then gathered phenotypic data regarding leaf number and plant height under high- and low-light conditions from two generations. In addition to the developed genotype data, a functional mapping model was used to loc

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Wang, Mengjie, Jin Shen, John C. Thomas, et al. "Particle Size Measurement Using Dynamic Light Scattering at Ultra-Low Concentration Accounting for Particle Number Fluctuations." Materials 14, no. 19 (2021): 5683. http://dx.doi.org/10.3390/ma14195683.

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Dynamic light scattering (DLS) is a popular method of particle size measurement, but at ultra-low particle concentrations, the occurrence of number concentration fluctuations limits the use of the technique. Number fluctuations add a non-Gaussian term to the scattered light intensity autocorrelation function (ACF). This leads to an inaccurate particle size distribution (PSD) being recovered if the normal DLS analysis model is used. We propose two methods for inverting the DLS data and recovering the PSDs when number fluctuations are apparent. One is to directly establish the relationship betwe

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Fusco, B. M., M. Alessandri, V. Campagnolo, and M. Fanciullacci. "Transcutaneous electrical stimulation applied to the infratrochlear nerve induces a homatropine-resistant miosis in humans." Clinical Science 78, no. 5 (1990): 457–62. http://dx.doi.org/10.1042/cs0780457.

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1. Both high- and low-intensity transcutaneous electrical stimuli were applied to the emergence of the infratrochlear nerve in 18 healthy subjects. The effect on the size of the homolateral pupil was investigated. The width of the pupil was also measured when high-intensity transcutaneous electrical stimulation was applied to the contralateral side. 2. The high-intensity pulse resulted in constriction of the pupil when the stimulation was homolateral. The miosis was slow in onset (120 s latency) and long-lasting (80 s). No pupillary changes were detected after either ipsilateral low-intensity

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Lozano-Soto, Elena, Vanesa Soto-León, Simona Sabbarese, et al. "Transcranial static magnetic field stimulation (tSMS) of the visual cortex decreases experimental photophobia." Cephalalgia 38, no. 8 (2017): 1493–97. http://dx.doi.org/10.1177/0333102417736899.

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Background Transcranial static magnetic field stimulation (tSMS) reduces cortical excitability in humans. Methods The objective of this study was to determine whether tSMS over the occipital cortex is effective in reducing experimental photophobia. In a sham-controlled double-blind crossover study, tSMS (or sham) was applied for 10 minutes with a cylindrical magnet on the occiput of 20 healthy subjects. We assessed subjective discomfort induced by low-intensity and high-intensity visual stimuli presented in a dark room before, during and after tSMS (or sham). Results Compared to sham, tSMS sig

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Wang, Peng-Fei, Xi Lin, Lei Liu, et al. "A Semi-Floating Gate Transistor for Low-Voltage Ultrafast Memory and Sensing Operation." Science 341, no. 6146 (2013): 640–43. http://dx.doi.org/10.1126/science.1240961.

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As the semiconductor devices of integrated circuits approach the physical limitations of scaling, alternative transistor and memory designs are needed to achieve improvements in speed, density, and power consumption. We report on a transistor that uses an embedded tunneling field-effect transistor for charging and discharging the semi-floating gate. This transistor operates at low voltages (≤2.0 volts), with a large threshold voltage window of 3.1 volts, and can achieve ultra–high-speed writing operations (on time scales of ~1 nanosecond). A linear dependence of drain current on light intensit

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Colace, Lorenzo, Gaetano Assanto, and Andrea De Iacovo. "Light-Emitting Diodes for Energy Harvesting." Electronics 13, no. 8 (2024): 1587. http://dx.doi.org/10.3390/electronics13081587.

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Energy harvesting is gaining substantial relevance in the realm of ultra-low-power electronics and Internet-of-Things devices with limited access to classic power sources. Several harvesting approaches are available, depending on the energy source; among them, photovoltaic devices benefit from the highest energy density. However, the inclusion of a dedicated photovoltaic cell in a low-power system may result in increased costs and complexity, thus hampering economic sustainability. Conversely, electronic apparatuses often make use of light-emitting-diodes (LEDs), which could be effectively emp

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Xu, Yun, Jingbo Sun, Jesse Frantz, et al. "Nonlinear Metasurface for Structured Light with Tunable Orbital Angular Momentum." Applied Sciences 9, no. 5 (2019): 958. http://dx.doi.org/10.3390/app9050958.

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Orbital angular momentum (OAM) beams may create a new paradigm for the future classical and quantum communication systems. A majority of existing OAM beam converters are bulky, slow, and cannot withstand high powers. Here, we design and experimentally demonstrate an ultra-fast, compact chalcogenide-based all-dielectric metasurface beam converter which has the ability to transform a Hermite–Gaussian (HG) beam into a beam carrying an OAM at near infrared wavelength. Depending on the input beam intensity, the topological charge carried by the output OAM beam can be switched between positive and n

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Боровик, Александр, Aleksandr Borovik, Антон Жданов, and Anton Zhdanov. "Distribution of low-power solar flares by brightness rise time." Solar-Terrestrial Physics 4, no. 3 (2018): 3–12. http://dx.doi.org/10.12737/stp-43201801.

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For brightness classes this trend is less pronounced. We have found that flares with explosive phase and flares with one brilliant point have the shortest flash phases; two-ribbon flares and flares with several intensity maxima, the longest ones. We have separated 572 cases when the brightness rise time was more than 60 min; 80 % of such ultra-long flares have a shorter brightness decay time (main phase). We have established that low-power flares in terms of developmental features do not differ from large flares. Low-power solar flares, as well as large flares, can be followed by filament acti

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Sivilotti, L., and C. J. Woolf. "The contribution of GABAA and glycine receptors to central sensitization: disinhibition and touch-evoked allodynia in the spinal cord." Journal of Neurophysiology 72, no. 1 (1994): 169–79. http://dx.doi.org/10.1152/jn.1994.72.1.169.

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1. Pain hypersensitivity is characterized by an increase in the response to noxious stimuli (hyperalgesia) and a reduction in threshold such that innocuous stimuli begin to elicit pain (allodynia). These sensitivity changes can be produced by an increase in excitability of dorsal horn neurons; the phenomenon of central sensitization. We have now examined whether a reduction in local segmental inhibitory mechanisms produces similar changes. The model system used for studying touch-evoked allodynia has been the recruitment of a low-threshold mechanoreceptor input to the nociceptive flexion withd

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JOHNSON, AARON P., W. JON P. BARNES, and MARTIN W. S. MACAULEY. "Effects of light intensity and pattern contrast on the ability of the land crab,Cardisoma guanhumi, to separate optic flow-field components." Visual Neuroscience 21, no. 6 (2004): 895–904. http://dx.doi.org/10.1017/s0952523804216091.

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Using a novel suite of computer-generated visual stimuli that mimicked components of optic flow, the visual responses of the tropical land crab,Cardisoma guanhumi, were investigated. We show that crabs are normally successful in distinguishing the rotational and translational components of the optic flow field, showing strong optokinetic responses to the former but not the latter. This ability was not dependant on the orientation of the crab, occurring both in “forwards-walking” and “sideways-walking” configurations. However, under conditions of low overall light intensity and/or low object/ba

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Zhou, Jian, Qiang Li, Zhipeng Huang, et al. "Study on the Adaptive Regulation of Light on the Stress Response of Mandarin Fish (Siniperca chuatsi) with Re-Feeding after Starvation." Animals 13, no. 16 (2023): 2610. http://dx.doi.org/10.3390/ani13162610.

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Light influences the stress response to environmental stimuli and feeding behaviors of Siniperca chuatsi and, thus, is an important regulator of normal growth and development. In this study, we first explored the important role of light on the digestive and stress capacity of S. chuatsi by studying the changes in physiological and biochemical indicators of S. chuatsi, taking the re-feeding after starvation as the constant environmental stimulus and the light intensity as the adjustable environmental stimulus. The activity of protease and lipase was generally higher in the stomach tissues than

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Poddar, Swapnadeep, and Zhiyong Fan. "(Invited) Revolutionizing Data Storage and Brain-Inspired Computing with Perovskite Nanowires and Quantum Wires." ECS Meeting Abstracts MA2024-02, no. 20 (2024): 1803. https://doi.org/10.1149/ma2024-02201803mtgabs.

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Halide perovskites (HPs) have been ubiquitously utilized in optoelectronics and photovoltaics in the recent past owing to their tunable bandgap, long charge diffusion lengths and high color purity. However, their application in resistive random access switching memories (RRAMs) has been somewhat limited by material and electrical instability associated with HP thin-film devices, resulting in below-par figures-of-merits (FOMs) such as data retention time, electrical endurance and switching speed. To collectively address the shortcomings of HP thin-film based RRAMs, we developed a switching matr

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Vergaro, Viviana, Francesca Baldassarre, Federica De Castro, et al. "Low-Intensity Light-Responsive Anticancer Activity of Platinum(II) Complex Nanocolloids on 2D and 3D In Vitro Cancer Cell Model." Bioinorganic Chemistry and Applications 2022 (April 23, 2022): 1–15. http://dx.doi.org/10.1155/2022/9571217.

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This study aimed to evaluate the therapeutic efficacy of low-intensity visible light responsive nanocolloids of a Pt-based drug using a 2D and three-dimensional (3D) in vitro cancer cell model. Biocompatible and biodegradable polymeric nanocolloids, obtained using the ultrasonication method coupled with Layer by Layer technology, were characterized in terms of size (100 ± 20 nm), physical stability, drug loading (78%), and photoactivation through spectroscopy studies. The in vitro biological effects were assessed in terms of efficacy, apoptosis induction, and DNA-Pt adducts formation. Biologic

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Hadinata, Fitra. "PENGARUH PERBEDAAN INTENSITAS CAHAYA TERHADAP PERTUMBUHAN DAN PERKEMBANGAN LARVA KERANG MUTIARA (Pinctada maxima, Jameson, 1901) SKALA LABORATORIUM." Management of Aquatic Resources Journal (MAQUARES) 1, no. 1 (2012): 66–70. http://dx.doi.org/10.14710/marj.v1i1.268.

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Pengembangan budidaya laut sejauh ini belum seintensif pengembangan budidaya air tawar dan air payau. Terbatasnya penyebaran informasi teknologi budidaya beberapa komunitas budidaya laut, antara lain kerang mutiara, menjadi salah satu kendala dalam upaya perluasan usaha bagi pembudidaya kerang mutiara tersebut. Intensitas cahaya berpengaruh terhadap pertumbuhan dan perkembangan larva kerang mutiara. Intensitas cahaya yang tidak terlalu tinggi dapat melindungi tubuh larva dari radiasi ultra violet. Larva kerang mutiara bersifat fototaksis positif dan umumnya selama metamorfose larva membutuhkan

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De, Debashis, Sitangshu Bhattacharya, S. M. Adhikari, A. Kumar, P. K. Bose, and K. P. Ghatak. "Simple theoretical analysis of the photoemission from quantum confined effective mass superlattices of optoelectronic materials." Beilstein Journal of Nanotechnology 2 (July 6, 2011): 339–62. http://dx.doi.org/10.3762/bjnano.2.40.

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The photoemission from quantum wires and dots of effective mass superlattices of optoelectronic materials was investigated on the basis of newly formulated electron energy spectra, in the presence of external light waves, which controls the transport properties of ultra-small electronic devices under intense radiation. The effect of magnetic quantization on the photoemission from the aforementioned superlattices, together with quantum well superlattices under magnetic quantization, has also been investigated in this regard. It appears, taking HgTe/Hg1− x Cd x Te and In x Ga1− x As/InP effectiv

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Barr, Stuart, and Robert W. Elwood. "Trade-Offs between Avoidance of Noxious Electric Shock and Avoidance of Bright Light in Shore Crabs Are Consistent with Predictions of Pain." Animals 14, no. 5 (2024): 770. http://dx.doi.org/10.3390/ani14050770.

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The suggestion that decapod crustaceans might experience pain has been dismissed by some authors who claim decapods only respond to noxious stimuli by nociceptive reflexes. Because reflexes do not require complex neuronal processing, but pain does, demonstrating reflex responses to noxious stimuli would not support the case for pain. Here, we report an experiment in which shore crabs are repeatedly placed in a light area (20 trials), but the animals can avoid the light by moving to a dark shelter. However, some crabs received an electric shock of 6 or 12 volts each time they entered the shelte

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Whitten, Justin, Dawn Tarabochia, David MacDonald, Rod Barrett, Chris Carty, and David Graham. "The relationship between physical activity intensity and volume on prospective falls in older adults." Innovation in Aging 5, Supplement_1 (2021): 683. http://dx.doi.org/10.1093/geroni/igab046.2568.

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Abstract The benefits of Physical Activity (PA) for older adults have been well documented relative to several physiological and neuromuscular factors, but the direct relationship of PA to fall incidence is unclear. In particular, the influence of the intensity and volume of habitual activities of daily living is poorly understood. The purpose of this study was to evaluate the influence of general PA intensity and overall volume on prospective falls in older adults. The PA of 134 participants was recorded using accelerometers (ActiGraph-GT3X+) over 7 consecutive days. Intensity was classified

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Tsukada, Kosuke, and Mitsuhiro Terakawa. "Laser direct writing of graphene quantum dots encircling conductive structures for stimuli-responsive anti-counterfeiting label." Optics Express 33, no. 9 (2025): 19479. https://doi.org/10.1364/oe.561008.

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Graphene quantum dots (GQDs) are fluorescent materials whose fluorescence intensity changes in response to external stimuli. In this study, we demonstrated the fabrication of a semi-cylindrical conductive microstructure encircled by GQDs on polydimethylsiloxane in a single step by laser carbonization. By adjusting laser parameters, structures with different resistance values were selectively fabricated. Under the voltage application to the structure, Joule heating in low-resistance structures led to a decrease in GQDs fluorescence intensity, while high-resistance structures showed minimal chan

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Боровик, Александр, Aleksandr Borovik, Антон Жданов, and Anton Zhdanov. "Distribution of low-power solar flares by brightness rise time." Solnechno-Zemnaya Fizika 4, no. 3 (2018): 5–16. http://dx.doi.org/10.12737/szf-43201801.

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Using data from the international flare patrol for 1972–2010, we have formed an electronic database for more than 123 thousand solar flares. We determined the mean brightness rise time (flash-phase) for flare area classes and importance. We show that the mean flash phase increased with increasing area class. For brightness classes this trend is less pronounced. We have found that flares with explosive phase and flares with one brilliant point have the shortest flash phases; two-ribbon flares and flares with several intensity maxima, the longest ones. We have separated 572 cases when the bright

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Chiappini, Andrea, Lam Thi Ngoc Tran, Pablo Marco Trejo-García, et al. "Photonic Crystal Stimuli-Responsive Chromatic Sensors: A Short Review." Micromachines 11, no. 3 (2020): 290. http://dx.doi.org/10.3390/mi11030290.

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Photonic crystals (PhC) are spatially ordered structures with lattice parameters comparable to the wavelength of propagating light. Their geometrical and refractive index features lead to an energy band structure for photons, which may allow or forbid the propagation of electromagnetic waves in a limited frequency range. These unique properties have attracted much attention for both theoretical and applied research. Devices such as high-reflection omnidirectional mirrors, low-loss waveguides, and high- and low-reflection coatings have been demonstrated, and several application areas have been

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Wang, Hongfei, and Qingmao Shang. "The combined effects of light intensity, temperature, and water potential on wall deposition in regulating hypocotyl elongation of Brassica rapa." PeerJ 8 (May 26, 2020): e9106. http://dx.doi.org/10.7717/peerj.9106.

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Hypocotyl elongation is a critical sign of seed germination and seedling growth, and it is regulated by multi-environmental factors. Light, temperature, and water potential are the major environmental stimuli, and their regulatory mechanism on hypocotyl growth has been extensively studied at molecular level. However, the converged point in signaling process of light, temperature, and water potential on modulating hypocotyl elongation is still unclear. In the present study, we found cell wall was the co-target of the three environmental factors in regulating hypocotyl elongation by analyzing th

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Yang, Libin, Dong Wang, Hong Gao, et al. "Photoacoustic effect and controlled release of azo and Schiff base derivatives modified by click reagents under the NIR light." Pigment & Resin Technology 49, no. 4 (2020): 331–38. http://dx.doi.org/10.1108/prt-12-2019-0121.

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Purpose This study aims to develop a new kind of functional low molecular weight organic dyes, which is highly efficient, meanwhile inexpensive and easily prepared and modified and can be used in photoacoustic (PA) imaging and photothermal therapy (PTT). To further realize the release of molecules under the biomedical condition, the releasing efficiency of micellar nanoparticles under different stimuli were represented. Design/methodology/approach A class of azo and Schiff base derivatives with different click reagents were characterized by PA imaging and photothermal (PT) experiments. The mol

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Balestra, Costantino, Kate Lambrechts, Simona Mrakic-Sposta, et al. "Hypoxic and Hyperoxic Breathing as a Complement to Low-Intensity Physical Exercise Programs: A Proof-of-Principle Study." International Journal of Molecular Sciences 22, no. 17 (2021): 9600. http://dx.doi.org/10.3390/ijms22179600.

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Inflammation is an adaptive response to both external and internal stimuli including infection, trauma, surgery, ischemia-reperfusion, or malignancy. A number of studies indicate that physical activity is an effective means of reducing acute systemic and low-level inflammation occurring in different pathological conditions and in the recovery phase after disease. As a proof-of-principle, we hypothesized that low-intensity workout performed under modified oxygen supply would elicit a “metabolic exercise” inducing a hormetic response, increasing the metabolic load and oxidative stress with the s

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Nazarova, Yulia A., and Vladimir A. Tikhonov. "Comparative analysis of the economic feasibility of using ultra-small spacecrafts." RUDN Journal of Engineering Researches 22, no. 1 (2021): 43–53. http://dx.doi.org/10.22363/2312-8143-2021-22-1-43-53.

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The relevance of the issue under consideration is associated with the evolution of existing technologies, due to which the functionality increases and the mass of the payload decreases, as a result of which the question of the use of cost-effective launch vehicles is raised. The purpose of this work is to carry out a comparative analysis of the feasibility of using ultra-light launch vehicles to provide services for the delivery of small spacecraft to low-earth orbit. The article is written within the framework of socio-economic research methods. Retrospective analysis and comparative approach

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Juusola, M., E. Kouvalainen, M. Järvilehto, and M. Weckström. "Contrast gain, signal-to-noise ratio, and linearity in light-adapted blowfly photoreceptors." Journal of General Physiology 104, no. 3 (1994): 593–621. http://dx.doi.org/10.1085/jgp.104.3.593.

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Response properties of short-type (R1-6) photoreceptors of the blowfly (Calliphora vicina) were investigated with intracellular recordings using repeated sequences of pseudorandomly modulated light contrast stimuli at adapting backgrounds covering 5 log intensity units. The resulting voltage responses were used to determine the effects of adaptational regulation on signal-to-noise ratios (SNR), signal induced noise, contrast gain, linearity and the dead time in phototransduction. In light adaptation the SNR of the photoreceptors improved more than 100-fold due to (a) increased photoreceptor vo

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KESKITALO, M. "Can protoplast production from in vitro cultured shoots of Tanacetum vary during the season?" Agricultural and Food Science 10, no. 3 (2001): 145–51. http://dx.doi.org/10.23986/afsci.5688.

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Two different experiments were carried out to study the production of protoplasts and the variation of protoplast yield from in vitro cultured shoot tips of tansy (Tanacetum vulgare L.) and pyrethrum (Tanacetum cinerariifolium (Trevir.) Schiltz-Bip). In the first experiment, light had more pronouced effect for tansy than for pyrethrum. When the donor tissues of tansy were cultured under high light intensity the leaves contained anthocyanin and became brown during enzyme maceration. In contrast, donor tissues cultured under low light intensity produced leaves without anthocyanin. Depending on t

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Ai, Lin, Min Tang, Ji Li, Hsiao Hsien Chen, and Hong Meng. "Ultra-Bright 2D Assembled Copper Nanoclusters: Fluorescence Mechanism Exploration and LED Application." Materials Science Forum 996 (June 2020): 20–25. http://dx.doi.org/10.4028/www.scientific.net/msf.996.20.

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Novel fluorescent nanomaterials have attracted enormous interests in the applications of illumination and display besides the traditional organic fluorophors. As potential alternatives, the environmental friendly fluorescent ultra-small organic-inorganic hybrid metal nanoclusters (size < 2 nm) is a series of powerful competitors used in illuminating field, on account of the non-poisonous, large amount of storage in earth, simple synthetic route, and relative low cost. The most important one, facile regulation of the fluorescence intensity and emission colors makes metal nanoclusters more at

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Wu, Qin, and Hao-Jin Sun. "Higher-Order Optomechanical Nonlinearity Based on the Mechanical Effect of Light." Photonics 10, no. 9 (2023): 991. http://dx.doi.org/10.3390/photonics10090991.

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Nonlinear cavity optomechanics based on the mechanical effect of light has recently received considerable attention due to its potential applications in high-precision metrology. In this work, we theoretically studied the third-order optomechanical nonlinearity by using a perturbative approach, and an analytical solution is given, which can be extended to cases of higher-order optomechanical nonlinearity. Furthermore, the generation of a third-order sideband is analyzed in detail, and the results show that the amplitude of the third-order sideband shows a high dependence on the control field d

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Shimizu, H., A. Ishida-Yamamoto, and R. A. Eady. "The use of silver-enhanced 1-nm gold probes for light and electron microscopic localization of intra- and extracellular antigens in skin." Journal of Histochemistry & Cytochemistry 40, no. 6 (1992): 883–88. http://dx.doi.org/10.1177/40.6.1375240.

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We used colloidal gold (1-nm diameter) with silver enhancement, in conjunction with a low-temperature post-embedding immunolabeling technique, to localize several antigens in normal skin at both the light and the electron microscopic level within the same tissue blocks. Normal skin subjected to cyrofixation and cryosubstitution and embedded in Lowicryl K11M was used as a substrate. Semi-thin sections (1 micron) were incubated in primary antibody (against epidermal basement membrane zone associated antigens and two keratin sub-types), biotinylated secondary antibodies, and then in 1-nm gold-con

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Boissonade, F. M., and B. Matthews. "Responses of trigeminal brain stem neurons and the digastric muscle to tooth-pulp stimulation in awake cats." Journal of Neurophysiology 69, no. 1 (1993): 174–86. http://dx.doi.org/10.1152/jn.1993.69.1.174.

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1. Cats were prepared for chronic recording from neurons in pars oralis and pars interpolaris of the trigeminal spinal nucleus. Electrodes were implanted into canine teeth for electrical stimulation and the digastric muscle for recording electromyograms. 2. Recordings were made from the animals when they were awake and unrestrained as well as when they were lightly anesthetized. Some neurons were studied under both conditions. 3. In an awake animal, single tooth-pulp stimuli of 0.1 ms duration and < or = 1 mA intensity produced no aversive behavior. 4. The response of trigeminal brain stem

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Ma, C. Y., J. Yu, T. Legero, et al. "Ultrastable lasers: investigations of crystalline mirrors and closed cycle cooling at 124 K." Journal of Physics: Conference Series 2889, no. 1 (2024): 012055. http://dx.doi.org/10.1088/1742-6596/2889/1/012055.

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Abstract We have investigated crystalline AlGaAs/GaAs optical coatings with three ultra-stable cavities operating at 4 K, 16 K, 124 K and 297 K. The response of the cavities’ resonance frequencies to variations in optical power indicates non-thermal effects beyond the photo-thermo-optic effect observed in dielectric coatings. These effects are strongly dependent on the intensity of the intracavity light at 1.5 μm. When the rear side of the mirrors is illuminated with external light, we observe a prominent photo-modified birefringence for photon energies above the GaAs bandgap, which points to

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González-García, Yolanda, Juan C. Meza-Contreras, José A. Gutiérrez-Ortega, and Ricardo Manríquez-González. "In Vivo Modification of Microporous Structure in Bacterial Cellulose by Exposing Komagataeibacter xylinus Culture to Physical and Chemical Stimuli." Polymers 14, no. 20 (2022): 4388. http://dx.doi.org/10.3390/polym14204388.

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Bacterial cellulose (BC) samples were obtained in a static culture of K. xylinus under the effect of a low-intensity magnetic field, UV light, NaCl, and chloramphenicol. The effect of such stimuli on the amount of BC produced and its production rate, specific area, pore volume, and pore diameter were evaluated. The polysaccharide production was enhanced 2.28-fold by exposing K. xylinus culture to UV light (366 nm) and 1.7-fold by adding chloramphenicol (0.25 mM) to the medium in comparison to BC control. All the stimuli triggered a decrease in the rate of BC biosynthesis. BC membranes were fou

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Zheng, Jiahui, Xin Yan, Wei Wei, et al. "A Low-Threshold Miniaturized Plasmonic Nanowire Laser with High-Reflectivity Metal Mirrors." Nanomaterials 10, no. 10 (2020): 1928. http://dx.doi.org/10.3390/nano10101928.

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A reflectivity-enhanced hybrid plasmonic GaAs/AlGaAs core-shell nanowire laser is proposed and studied by 3D finite-difference time-domain simulations. The results demonstrate that by introducing thin metal mirrors at both ends, the end facet reflectivity of nanowire is increased by 30–140%, resulting in a much stronger optical feedback. Due to the enhanced interaction between the surface charge oscillation and light, the electric field intensity inside the dielectric gap layer increases, resulting in a much lower threshold gain. For a small diameter in the range of 100–150 nm, the threshold g

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Domański, J., J. Badziak, and S. Jabłoński. "Generation of proton beams from two-species targets irradiated by a femtosecond laser pulse of ultra-relativistic intensity." Laser and Particle Beams 35, no. 2 (2017): 286–93. http://dx.doi.org/10.1017/s0263034617000209.

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AbstractThe paper presents results of two-dimensional particle-in-cell simulations of ion beam acceleration at the interactions of a 130-fs laser pulse of intensity in the range 1021–1023 W/cm2, predicted for the Extreme Light Infrastructure lasers, with thin hydrocarbon (CH) or erbium hydride (ErH3) targets. A special attention is paid to the effect of the laser pulse intensity and polarization (linear, circular) on the proton energy spectrum, the proton beam spatial distribution and the proton pulse shape and intensity. It is shown that for the low laser intensities (~1021 W/cm2) considerabl

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Wiegell, Stine Regin, Jakob Heydenreich, Susanne Fabricius, and Hans Christian Wulf. "Continuous ultra-low-intensity artificial daylight is not as effective as red LED light in photodynamic therapy of multiple actinic keratoses." Photodermatology, Photoimmunology & Photomedicine 27, no. 6 (2011): 280–85. http://dx.doi.org/10.1111/j.1600-0781.2011.00611.x.

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Вершовский, А. К., та М. В. Петренко. "Методы возбуждения параметрического резонанса в схеме оптического магнитометрического датчика". Журнал технической физики 91, № 5 (2021): 840. http://dx.doi.org/10.21883/jtf.2021.05.50698.337-20.

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An experimental comparison of the methods for modulating the parameters of resonant transverse to the external magnetic field pumping radiation in a two-beam optical magnetometric sensor (so called Bell-Bloom scheme) is carried out, as well as a comparison of these methods with the standard method of radio-frequency excitation of magnetic resonance under conditions of strong laser pumping. It is shown that although the standard method allows one to achieve a greater suppression of the spin-exchange broadening of the magnetic resonance line by pumping light, the Bell-Bloom scheme has advantages

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Вершовский, А. К., та М. В. Петренко. "Методы возбуждения параметрического резонанса в схеме оптического магнитометрического датчика". Журнал технической физики 91, № 5 (2021): 840. http://dx.doi.org/10.21883/jtf.2021.05.50698.337-20.

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An experimental comparison of the methods for modulating the parameters of resonant transverse to the external magnetic field pumping radiation in a two-beam optical magnetometric sensor (so called Bell-Bloom scheme) is carried out, as well as a comparison of these methods with the standard method of radio-frequency excitation of magnetic resonance under conditions of strong laser pumping. It is shown that although the standard method allows one to achieve a greater suppression of the spin-exchange broadening of the magnetic resonance line by pumping light, the Bell-Bloom scheme has advantages

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Nemanich, R. J., S. L. English, J. D. Hartman, W. Yang, H. Ade, and R. F. Davis. "Photo-Electron Emission Microscopy of Semiconductor Surfaces." Microscopy and Microanalysis 4, S2 (1998): 606–7. http://dx.doi.org/10.1017/s1431927600023151.

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The technique of photo-electron emission microscopy (PEEM) is based on imaging of photo excited electrons from a surface. Typically ultra violet (UV) light above the work function of a metal will cause electrons to be emitted from a surface. Since photo excited electrons originate very near to the surface, they essentially reflect the electronic structure of the surface. These electrons may be accelerated and imaged, and the image will reflect the properties of the surface.While the PEEM technique has been understood in a basic sense for many years, it has been limited by the lack of high inte

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Siddiq, Muhammad, Khush Bakhat, and Muhammad Ajmal. "Stimuli responsive microgel containing silver nanoparticles with tunable optical and catalytic properties." Pure and Applied Chemistry 92, no. 3 (2020): 445–59. http://dx.doi.org/10.1515/pac-2018-1203.

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AbstractIn this work, poly (vinylcaprolactam-co-itaconic acid) microgel was prepared by free radical polymerization. Silver nanoparticles were prepared in synthesized microgel networks by in situ reduction of Ag+ ions, loaded in microgel from aqueous solution of AgNO3. The prepared microgel was characterized by Fourier transformation infra-red spectroscopy, UV-Visible spectroscopy, fluorescence spectroscopy, X-ray diffraction, laser light scattering, thermal gravimetric analysis, differential scanning calorimetry and transmission electron microscopy. Swelling behavior of microgel was studied a

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Liu, Qiaojun, Andrew Yuksun Cheng, Jianhua Zhu, Sauwa Chang, and Kinseng Tam. "Ultra-Violet Mie Lidar Observations of Particulates Vertical Profiles in Macao during a Record High Pollution Episode." Remote Sensing 14, no. 1 (2021): 118. http://dx.doi.org/10.3390/rs14010118.

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Vertical profiles of particulates were measured in Macao by using a 355 nm Mie scattering lidar during a dust event. A high energy pulse laser was employed as the light source to detect the extinction coefficient in the atmosphere. The extinction profiles showed layers of high aerosol concentrations in good agreement with both back trajectory analysis and ground-based pollution measurements in Macao, which indicate that this lidar is very useful for monitoring extinction profiles during extreme high aerosol loading and low visibility atmospheric conditions when most low energy lidar system is

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Hunt, Lena, Karel Klem, Zuzana Lhotáková, et al. "Light and CO2 Modulate the Accumulation and Localization of Phenolic Compounds in Barley Leaves." Antioxidants 10, no. 3 (2021): 385. http://dx.doi.org/10.3390/antiox10030385.

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Barley (Hordeum vulgare) accumulates phenolic compounds (PhCs), which play a key role in plant defense against environmental stressors as antioxidants or UV screening compounds. The influence of light and atmospheric CO2 concentration ([CO2]) on the accumulation and localization of PhCs in barley leaves was examined for two varieties with different tolerances to oxidative stress. PhC localization was visualized in vivo using fluorescence microscopy. Close relationships were found between fluorescence-determined localization of PhCs in barley leaves and PhC content estimated using liquid chroma

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Shen, Wen. "Repetitive Light Stimulation Inducing Glycine Receptor Plasticity in the Retinal Neurons." Journal of Neurophysiology 94, no. 3 (2005): 2231–38. http://dx.doi.org/10.1152/jn.01099.2004.

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Neurotransmitter receptor plasticity is a mechanism that can regulate the temporal and intensity encoding of a synapse. While this has been extensively studied as a mechanism of learning, less is known about such processes in sensory systems. This study examines modulation of glycine receptor function at the first synapse in the retina. It was found that horizontal cells, which are postsynaptic to photoreceptors, have glycine receptor currents that are enhanced when internal calcium is elevated. This can be achieved by glutamatergic synaptic input or by activation of voltage-gated calcium chan

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Skallerup Andersen, Maria, Ali Karshenas, Flemming Winther Bach, and Parisa Gazerani. "Pain and Sensory Abnormalities in Parkinson’s Disease—An Age- and Gender-matched Controlled Pilot Study." US Neurology 11, no. 01 (2015): 27. http://dx.doi.org/10.17925/usn.2015.11.01.27.

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Background/aims:To test whether patients with Parkinsons disease (PD) have an altered sensory perception in response to painful and nonpainful stimuli and if the PD medications can influence the responses.Methods:PD patients (12) and healthy subjects (12) were recruited. Sensory perception was examined in forearms, low back, and hands by light brush, pinprick, cold pressure test (CPT), and pressure algometry.Results:A significant difference was found in PD patients in response to brush (p<0.05) and pinprick (p<0.001). Lower back and forearms were found to be more sensitive. Tolerance ti

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Martínez-Martínez, Simón, Daniel de la Rosa-Urbalejo, Luis F. Rua-Mojica, Raúl Hernández-Altamirano, and Violeta Y. Mena-Cervantes. "Experimental analysis of real-world emissions using ultra-low carbon intensity biodiesel for a light-duty diesel vehicle in Monterrey metropolitan area." Fuel 317 (June 2022): 123408. http://dx.doi.org/10.1016/j.fuel.2022.123408.

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Wu, Ke, Gaowei Wu, Alexander J. MacRobert, Elaine Allan, Asterios Gavriilidis, and Ivan P. Parkin. "Ultra high molecular weight polyethylene with incorporated crystal violet and gold nanoclusters is antimicrobial in low intensity light and in the dark." Materials Advances 1, no. 9 (2020): 3339–48. http://dx.doi.org/10.1039/d0ma00710b.

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Rodrigues, Matheus S., Pedro M. Lazari, Marco C. P. Soares, and Eric Fujiwara. "Characterization of Hand Gestures by a Smartphone-Based Optical Fiber Force Myography Sensor." Engineering Proceedings 2, no. 1 (2020): 46. http://dx.doi.org/10.3390/ecsa-7-08178.

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In this paper, a smartphone-integrated, optical fiber sensor based on the force myography technique (FMG), which characterizes the stimuli of the forearm muscles in terms of mechanical pressures, was proposed for the identification of hand gestures. The device’s flashlight excites a pair of polymer optical fibers and the output signals are detected by the camera. The light intensity is modulated through wearable, force-driven microbending transducers placed in the forearm and the acquired optical signals are processed by an algorithm based on decision trees and residual error. The sensor provi

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