Radiation In Visible Range Research Articles

EFFECT OF VISIBLE RANGE ELECTROMAGNETIC RADIATION ON SALMONELLA (CAUSATIVE AGENT OF TYPHOID)

Salmonella is the agent responsible for a range of clinical diseases. With emerging antimicrobial resistance, alternative treatment options, including visible range radiation therapy are becoming increasingly common. Visible Range Radiation Therapy/Color Therapy is an emerging technique in the field of energy/vibrational medicine that uses visible spectrum of Electromagnetic Radiation to cure different diseases. In this study, our goal was to understand the effect of Visible Range Electromagnetic Radiation on Salmonella (in vitro) and therefore find out the

Efficacy of Environics Color Slides in Detecting the Color Deficiency and Healing

Chromotherapy, also called Color Therapy or Visible Range Radiation Therapy, is a non-pharmacological therapeutic modality that uses various wavelengths of electromagnetic radiation from within the visible spectrum (colors).
 Methods & Materials: The study was performed on 65 healthy participants from SGT University, Gurgaon, India. Full, free, and voluntary informed consent was obtained from all subjects and/or their legal guardian(s). Colour deficiency was diagnosed with the help of Environics Colour Slides and an Instrument called Lecher Antenna which works on the principle of resonance. The diagnosis results obtained from color slides and Lecher Antenna, (SBJ International, PARIS) were compared with the results obtained from the Es- Teck Complex, (LD Technology™, US) an FDA-approved Medical Software and Machine.
 Results: It was observed that 86.11% of participants showed improvement in their health conditions after using the Environics Colour Slides for the period specified during the diagnosis. It was also observed that there was an 87.69% correlation between the findings of the Environics Colour Slides / Lecher Antenna combination and the ES-Teck Medical Software in identifying the health condition of the participants.
 Conclusion: Chromotherapy will greatly benefit from this evidence base and help propagate this alternative treatment modality for the safe, and non-pharmacological treatment of many diseases [5].

Unveiling quaternary GeSbSeEr chalcogenides as photocatalyst: Degradation of cationic and anionic pollutant in visible light

This article presents the photo-catalytic dye-degradation from pure and doped multi-component Ge17Sb8Se75-xErx(x = 0, 0.2, 0.4, 0.6, 0.8, 1) chalcogenides system has been established in visible light (orange ∼590 nm) for the first time. Band-gap shifting, suitable band position and higher absorption of visible range radiation have been accounted for Er doping to realize the improvement in electron-hole pair production. The improvement in the photo-catalytic activity dye degradation efficiency of 89% in 90 min for methylene blue and 76% for methyl orange has been achieved for certain compositions of chalcogenides glass which were synthesized by traditional melt quench approach. Further, SEM-EDX Photoluminescence and Raman spectroscopy measurements of these samples are supplemented to deliberate the composition, band edge transitions and chemical signatures of Ge17Sb8Se75-xErx. Overall, the presence of Er ions as well as the band to band transition (∼664 nm) in the chalcogenides system is found to play a decisive role in the photo catalytically process involved for competitive dye degradation to replace conventional dyes working in the UV range.

Improving the functionality of the semiconductor matrix receiver of optical radiation

The work is devoted to improving the functionality of the semiconductor integrated matrix receiver of visible range radiation with a capacitor multichannel analog-to-digital Converter on a chip. Reading is carried out by a column capacitor of sequential approximation with a digital-analog converter based on switched capacitors DAC with charge summation. In the matrix receiver, the occupied area and the dissipated power of the semiconductor chip are significantly reduced with the simple implementation of capacitor structures by the technology of semiconductor micro-devices manufacturing.

Effect of Blue Colour (453 nm Visible Range Radiation) on Anxiety in College Students

The Biological effect of blue color therapy on self-reported anxiety in college students was determined. Female students (n = 150) of age 18 - 24 from a Government college (w) Gulberg in Lahore, Pakistan were randomized into two groups (n = 75 each), Group A (chromotherapy) and Group B (control). For the treatment of anxiety, two methods of chromo therapy used were Hydrochromotherapy (Blue chromotized water) and through watching colors (Blue chart). After 2, 4 and 6 weeks, the number of students experiencing improvement in their anxiety from Group A were 60, 9 and 0 respectively. In Group B, students that recovered from anxiety were 17, 12 and 7 after 2, 4 and 6 weeks respectively. Relation between therapy and improvement in anxiety was examined using χ2 statistic. Relation between these variables was significant, (1, n = 150) = 11.24, p

EFFECT OF VISIBLE RANGE ELECTROMAGNETIC RADIATIONS ON ESCHERICHIA COLI

Background:Escherichia coli is the agent responsible for a range of clinical diseases. With emerging antimicrobial resistance, other treatment options including solar/photo-therapy are becoming increasingly common. Visible Range Radiation Therapy/Colour Therapy is an emerging technique in the field of energy/vibrational medicine that uses visible spectrum of Electromagnetic Radiations to cure different diseases. In this study, our goal was to understand the effect of Visible Range Electromagnetic Radiations on E. coli (in vitro) and therefore find out the most appropriate visible range radiation for the treatment of diseases caused by E. coli.Materials and Methods:A total of 6 non-repetitive E. coli isolates were obtained from urine samples obtained from hospitalized patients with UTI. Single colony of E. coli was inoculated in 3 ml of Lysogeny Broth (LB) and 40 μl of this E. coli suspension was poured into each of the plastic tubes which were then irradiated with six different wavelengths in the visible region (Table. 1) after 18 hours with one acting as a control. The Optical Densities of these irradiated samples were then measured. Furthermore, scanning electron microscopy (TEFCAN ZEGA3) was carried out.Results:The analysis of the microscopic and SEM images of irradiated E. coli samples with six different visible range radiations is representative of The fact that E. coli responded differently to every applied radiation in the visible region and the most profound inhibitory effects were that of 538nm Visible Range Radiation (Green) which proved to be bactericidal and 590nm Visible Range Radiation (yellow) which was bacteriostatic. The enhanced growth of E. coli with varying degrees was clearly observed in 610nm (orange), 644nm (red), 464nm (Purple) and 453nm (blue).Conclusion:It can be concluded that 538nm (Green) and 590nm (Yellow) can effectively be used for treating E. coli borne diseases.

EFFECT OF VISIBLE RANGE ELECTROMAGNETIC RADIATIONS ON ESCHERICHIA COLI.

Escherichia coli is the agent responsible for a range of clinical diseases. With emerging antimicrobial resistance, other treatment options including solar/photo-therapy are becoming increasingly common. Visible Range Radiation Therapy/Colour Therapy is an emerging technique in the field of energy/vibrational medicine that uses visible spectrum of Electromagnetic Radiations to cure different diseases. In this study, our goal was to understand the effect of Visible Range Electromagnetic Radiations on E. coli (in vitro) and therefore find out the most appropriate visible range radiation for the treatment of diseases caused by E. coli. A total of 6 non-repetitive E. coli isolates were obtained from urine samples obtained from hospitalized patients with UTI. Single colony of E. coli was inoculated in 3 ml of Lysogeny Broth (LB) and 40 μl of this E. coli suspension was poured into each of the plastic tubes which were then irradiated with six different wavelengths in the visible region (Table. 1) after 18 hours with one acting as a control. The Optical Densities of these irradiated samples were then measured. Furthermore, scanning electron microscopy (TEFCAN ZEGA3) was carried out. The analysis of the microscopic and SEM images of irradiated E. coli samples with six different visible range radiations is representative of The fact that E. coli responded differently to every applied radiation in the visible region and the most profound inhibitory effects were that of 538nm Visible Range Radiation (Green) which proved to be bactericidal and 590nm Visible Range Radiation (yellow) which was bacteriostatic. The enhanced growth of E. coli with varying degrees was clearly observed in 610nm (orange), 644nm (red), 464nm (Purple) and 453nm (blue). It can be concluded that 538nm (Green) and 590nm (Yellow) can effectively be used for treating E. coli borne diseases.

Uniform spatial distribution of a nanostructured Ag/AgCl plasmonic photocatalyst and its segregative membrane towards visible light-driven photodegradation

A uniform spatially distributed Ag/AgCl nanostructure on a hierarchical titanate microsphere (TMS) was rationally designed for visible light-driven water purification. The hierarchical TMS was firstly prepared by a one-step hydrothermal method, and then the AgCl nanoparticles were grown on the surface of TMS via a unique ion-exchange method. Eventually, anti-aggregated Ag/AgCl/TiO2 microsphere hybrid photocatalysts were obtained after heat treatment and light irradiation. The Ag/AgCl/TiO2 microsphere treated at 400 °C exhibits the best photocatalytic activity, which is six times better than that of pure Ag/AgCl. This is attributed to the uniform spatial distribution of Ag/AgCl nanoparticles, better light absorption efficiency within the hierarchical microsphere, and better separation of photo-generated charges with the synergistic effect of TiO2 microspheres and Ag/AgCl. More impressively, a free-standing and segregative membrane made of Ag/AgCl/TiO2 microspheres also shows excellent photocatalytic performance in degrading methyl orange (MO) and methylene blue (MB) dyes under visible range radiation. Our results validate that the as-prepared Ag/AgCl/TiO2 microsphere plasmonic photocatalyst provides an efficient way to realize organic pollutant removal under visible light.

Visible Light assisted Photocatalytic Acitivity of Zinc Titanate in Presence of Metallic Sodium

Zinc titanate powder was synthesizd by an organic free co-precipitation peroxide technique. Zinc chloride and titanium (IV) isopropoxide were used as the primary material with the ratio of Zn:Ti was 1:1 and the later compound was prepared by mixing titanium chloride with isopropanol. The stoichiometric ratio of the synthesized zinc titanate was measured by using AAS. The synthesized powder was calcined at 800°C for 3 hours using the X-ray diffraction and the calcined zinc titanate powder crystalline phase formation was found to be cubic. FTIR was used for studying the bonding characteristics of ZnO and TiO2. Disintegration temperature was analyzed by means of Thermogravimetric analysis. The photocatalytic activity was measured based on the degradation of methyl orange in aqueous solution in the presence of metallic sodium. The results showed that ZnTiO3 particle exhibited good photocatalytic activity under visible range radiation.

Copper-Vapor Laser Induced Local Crystallization of Glasses in the System Li2O–B2O3–GeO2

Experiments on local modification of lithium-borogermanate (LBG) glass with the composition (molar fraction, %) 25Li2 O ∙ 25B2O3 ∙ 50GeO by copper-vapor laser radiation on the main lasing lines (510.6 and 578.2 nm) in the visible range and on the sum frequency in the UV range (271 nm) are described. Local surface crystallization of LBG glass by a laser beam with 2 – 15 μm crystals precipitated by means of laser heating of the sample at temperature somewhat below t g is demonstrated for the first time. X-ray phase analysis and confocal RS spectroscopy show that the polar phase LiBGeO4 is the only phase formed as a result of crystallization. Crystallization obtains with UV- and visible-range radiation.

Photo-catalytic decolourisation of toxic dye with N-doped titania: A case study with Acid Blue 25

Dyes are one of the hazardous water pollutants. Toxic Acid Blue 25, an anthraquinonic dye, has been decolourised by photo-catalysing it with nitrogen doped titania in aqueous medium. The photo catalyst was prepared from 15% TiCl3 and 25% aqueous NH3 solution as precursor. XRD and TEM revealed the formation of well crystalline anatase phase having particle size in the nano-range. BET surface area of the sample was higher than that of pure anatase TiO2. DRS showed higher absorption of radiation in visible range compared to pure anatase TiO2. XPS revealed the presence of nitrogen in N-Ti-O environment. The experimental parameters, namely, photocatalyst dose, initial dye concentration as well as solution pH influence the decolourisation process. At pH 3.0, the N-TiO2 could decolourise almost 100% Acid Blue 25 within one hour. The influence of N-TiO2 dose, initial concentration of Acid Blue 25 and solution pH on adsorption-desorption equilibrium is also studied. The adsorption process follows Lagergren first order kinetics while the modified Langmuir-Hinselwood model is suitably fitted for photocatalytic decolourisation of Acid Blue 25.

Nanocomposites based on globular photonic crystals grown by laser ablation using femtosecond laser pulses

The prepared samples were characterized by reflection and transmission spectra of broadband visible-range radiation, and the volume fraction of substances introduced into pores of artificial opals is estimated. It is found that the introduction of solid-state nanoparticles with negative real part of the permittivity into opal pores results in a decrease in the effective refractive index and a short-wavelength shift in the spectral position of the stop band in artificial opal.

Spectroscopy of stop bands in magnetic photonic crystals

The shape of the spectra of continuous visible-range radiation reflection from the surface (111) of a globular photonic crystal filled with magnetic materials was determined. The bands observed in the reflectance spectrum correspond to the appearance of stop bands of the photonic crystal. It was shown that position of the intensity maximum in the observed reflectance spectra depends on the type of a magnetic material introduced into photonic crystal pores.

Transmission performance of fibre-optic bundle for solar lighting

Transmission of concentrated solar energy via fibre-optic bundle (FOB) has a great potential for numerous applications. In this paper, it is aimed to determine the transmission performance of a constructed plastical FOB-based solar lighting system. The experiments and measurements are carried out by means of a metal halide source simulating the spectral distribution of solar radiation in visible range of wavelength. Optical efficiency, luminous efficacy, attenuation, spectral characterization under different bending conditions, integration of optical filters and FOB were investigated. The effects of the optical filter proposed are discussed for a solar lighting system. Spectral and colour properties of FOB and the optical filter are also presented. Copyright © 2008 John Wiley & Sons, Ltd.

Parameters of the discharge plasmas of surface-plasma sources of negative hydrogen ions

The main parameters of the plasma of high-current hydrogen-cesium glow discharges of surface-plasma (planotron and Penning) sources of negative hydrogen ions are determined using contact-free spectroscopic methods and compared for identical discharge current densities. The elemental and charge composition of the plasma is established. The temperature of the hydrogen atoms and the energy of the visible-range radiation of the plasma discharge are measured and estimates of the electron density in the plasma are made. The dynamics of the change in the parameters of the discharge plasma of a Penning source — the densities of hydrogen atoms, cesium atoms and ions, and molybdenum atoms — is tracked during a discharge pulse with spatial resolution along two coordinates. It is observed that cesium atoms and ions and molybdenum atoms are pent up near the cathode surface.

Electric and photoelectric properties of n-GaxIn1−x N/p-Si anisotypic heterojunctions

We have developed a technology for producing n-type GaxIn1−xN/p-Si heterostructures by combined pyrolysis of indium and gallium monoammoniate chlorides, making it possible to obtain heterolayers with composition varying over wide limits (from GaN up to InN). The composition and basic electric and optical characteristics of nitride films were determined. The electric and photoelectric properties of the heterostructures with GaxIn1−xN films of different composition were investigated. It was shown that the anisotypic heterojunction n-GaxIn1−xN/p-Si is a promising photosensitive element for detecting visible-range radiation. The maximum values of the specific detectivity were D*=1.2×1011 Hz1/2·W−1 at 290 K. A band diagram of the heterojunction was constructed.

Physical grounds of high-sensitive room temperature detection of infrared radiation involving spherical excitons at impurities in crystals

The possibility of the IR-radiation detecting in crystals of direct-gap semiconductors, caused by effects of IR-quenching of probe visible-range radiation within the region of a crystal relative transparency, is studied both theoretically and experimentally. The comparison of some mechanisms investigated allows to conclude that the most probable explanation of the IR-quenching effect, experimentally observed in the CdS crystal, is the mechanism of probe radiation absorption with photon energy “deficit” with respect to exciton resonance, which is eliminated due to exchange interaction of a free exciton in the intermediate state with spherical excitons localized on manyelectron atoms of impurity.

Possibility of Daylight Simulators Composed of Several Monochromatic Radiations

The possibility of realizing daylight simulators satisfying the conditions specified in JIS Z8720-1983 and Publication CIE No. 51, with line spectrum sources composed of several monochromatic radiations (lines), was examined by a nonlinear programming technique. It was found possible to realize simulators satisfying: (1) the condition of a visible range metamerism index Mlvis ≤ 0.5 (CIELAB10) with 5 spectral lines, (2) the condition of an ultraviolet range metamerism index Mluv ≤ 1 (CIELAB10) with 3 lines, (3) both Mlvis ≤ 0.5 and Mluv ≤ 1,while the general color rendering index Ra is not sufficiently high, with 6 lines, (4) Ra ≥ 95 (CIE 2nd Edition), while Mlvis is not sufficiently good, with 5 lines, and (5) Mlvis ≤ 0.5,Mluv ≤ 1 and Ra ≥ 95 with 7 lines. (6) Six lines are necessary to realize both Mlvis ≤ 0.5 and Ra ≥ 95, in contrast with 5 lines in cases (1) and (4). It is suggested that daylight simulators in either case (5) or (6) are insufficient to reproduce the color appearance of chromatic fluorescent objects excited by visible range radiation under a natural daylight illuminant.