UV Sensor

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Ultraviolet Radiation Measurement via Smart Devices

Ultraviolet Radiation Measurement via Smart Devices

The ML8511 sensor breakout is a simple to utilize bright light sensor. The MP8511 UV Sensor yields a simple flag in connection to the measure of UV light it distinguishes. This can be convenient in making gadgets that caution the client of sunburn or distinguish the UV file as it identifies with climate conditions. This sensor identifies 280-390nm light generally viably. This is classified as a component of the UVB (copying beams) range and a large portion of the UVA (tanning beams) range.

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IoT Based Smart Village as a Model for Swatch Bharat with a Web App Using Raspberry Pi

IoT Based Smart Village as a Model for Swatch Bharat with a Web App Using Raspberry Pi

Automatic street light control :LDR and IR sensor are used. The LDR sensor works when the intensity of light becomes low. The IR sensor is used for detecting the vehicles/humans, once the vehicle is detected on the street the light becomes automatically turn on through LDR sensor so from this automatic street light control power can be saved. Automatic water control system and the nature of water: and it uses the UV,IR and pH sensor for the supply of water and to check the quality of water the IR sensor and UV sensor is placed on top of the tank when the IR==1 it shows that the water tank is filled then relay gets automatically OFF and when UV sensor gets low then the relay turns ON and the water starts to fill in the tank so the water and energy can be saved and also the quality of water and intimated to the authorized person as well as the villagers . This all scenarios are loaded in web page and the LCD through the IoT.
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Understanding the UV Reactor Performance: A Lagrangian viewpoint

Understanding the UV Reactor Performance: A Lagrangian viewpoint

The lamp power was 87 Watts with 28 Watts UV output at 254nm (catalog number 05- 0264 GHO36T5/L/4PSE, Atlantic Ultraviolet Corp.). The water flows through a 6-inch PVC pipe from the inlet side of the reactor to the outlet side. The inlet side 6-inch PVC pipe is connected by a 4-inch pipe, which is 40 inches in length (i.e. 10 pipe diameters) to achieve the straight pipe hydraulic condition. The Lagrangian UV sensor insertion point was composed of a 2-inch pipe, a valve, and a cap. A round rod with a small plate on its end was used to insert the Lagrangian UV sensor into the y-elbow, which was connected to the 4-inch main pipe toward the reactor (Figure 4). The outlet part was composed of 3- inch Tee, 3-inch pipe, a valve, and 90 degree elbow. A net installed inside of the Tee prevented the Lagrangian UV sensor from following water flow toward the recirculation portion of the UV system and forced the Lagrangian UV sensor to the outlet collection point. When the valve of the outlet part was opened, the Lagrangian UV sensor was discharged into a liquid-filled basket (Figure 5).
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UVIS25. Digital UV index sensor: 0-15 UV index output range. Description. Features. Applications

UVIS25. Digital UV index sensor: 0-15 UV index output range. Description. Features. Applications

Typically the UV sensor needs to be protected from dust and other possible contaminating agents. For this purpose, a transparent glass or lens may be added over the device as part of the application embodiment. Selection of the protective lens or glass has to be done very carefully since it may impact the overall system performances. Lens must not introduce any attenuation in the UV range.

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UV sensing using film bulk acoustic
resonators based on Au/n-ZnO/
piezoelectric-ZnO/Al structure

UV sensing using film bulk acoustic resonators based on Au/n-ZnO/ piezoelectric-ZnO/Al structure

A new type of ultraviolet (UV) light sensor based on film bulk acoustic wave resonator (FBAR) is proposed. The new sensor uses gold and a thin n-type ZnO layer deposited on the top of piezoelectric layer of FBAR to form a Schottky barrier. The Schottky barrier’s capacitance can be changed with UV light, resulting in an enhanced shift in the entire FBAR’s resonant frequency. The fabricated UV sensor has a 50 nm thick n-ZnO semiconductor layer with a carrier concentration of , 10 17 cm 23 . A large frequency downshift is observed

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IoT Based Smart Village as a Model for Swatch Bharat with a Web App Using Raspberry Pi

IoT Based Smart Village as a Model for Swatch Bharat with a Web App Using Raspberry Pi

Automatic water control system and the nature of water: and it uses the UV,IR and pH sensor for the supply of water and to check the quality of water the IR sensor and UV sensor is placed on top of the tank when the IR==1 it shows that the water tank is filled then relay gets automatically OFF and when UV sensor gets low then the relay turns ON and the water starts to fill in the tank so the water and energy can be saved and also the quality of water and intimated to the authorized person as well as the villagers . This all scenarios are loaded in web page and the LCD through the IoT.
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Attenuation of UV C Solar Radiation as a Function of Altitude (0 ≤ z ≤ 100 km): Rayleigh Diffusion and Photo Dissociation of O2 Influence

Attenuation of UV C Solar Radiation as a Function of Altitude (0 ≤ z ≤ 100 km): Rayleigh Diffusion and Photo Dissociation of O2 Influence

In this paper, we present an analysis of attenuation for UV-C radiation ( λ ≤ 290 nm ) as a function of the altitude z ( 0 ≤ ≤ z 100 km ) by calculat- ing the interaction ratio between the UV-C radiation and the molecular spe- cies susceptible of interact with UV-C radiation. The Rayleigh scattering spectral cross sections were calculated, the UV-C spectral cross sections of the species susceptible of interact with UV-C radiation and the UV extra- terrestrial ( ETR ) solar spectrum were standardized with wavelength steps of 1 nm, and The International Standard Atmosphere model (ISO 1972) was adapted to calculate the molecular density. These data were utilized to cal- culate the photodissociation and Rayleigh scattering ratios as a function of the altitude and to determine to what measure the photodissociation and the Rayleigh diffusion were determinants of the attenuation of UV-C radiation. It became clear that the photo dissociation of O 2 is the primordial mechan-
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Seduced by the dark side: integrating molecular and ecological perspectives on the influence of light on plant defence against pests and pathogens

Seduced by the dark side: integrating molecular and ecological perspectives on the influence of light on plant defence against pests and pathogens

Light-driven generation of ROS in damaged plants may be central to interactions between light and the resistance components of defence against pathogens or herbivores. Photosensitive chlorophyll degradation intermediates formed as a result of cellular damage caused by herbivores and necrotrophic pathogens can contribute to ROS generation and defence signalling (Kariola et al., 2005), as does excess hydrogen peroxide derived from photorespiration (e.g. Champognol et al., 1998; Mateo et al., 2004). Several studies described in Section V also indicate a requirement for functional chloroplasts to activate the HR during pathogen resistance, which might also suggest a functional relationship between light-driven reactive oxygen chemistry and defence. NADPH oxidase is clearly an important source of ROS for defence signalling, but is metabolically costly (in terms of NADPH consumption). It is possible that in some systems, ROS generation is supplemented by the action of light on photosensitive pigments such as chlorophyll. Potentially, ROS provides a basis for a “supply side” hypothesis very different from CNB. Resistance is facilitated in (high) light tissue because ROS for signalling can be supplied at less cost via light-driven reactions than those occurring in the dark. Interestingly, there is evidence that elevated UV-B can enhance wound-induced defensive chemicals (Levizou & Manetas, 2001).
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DNA repair and the evolution of transformation in Bacillus subtilis. III. Sex with damaged DNA.

DNA repair and the evolution of transformation in Bacillus subtilis. III. Sex with damaged DNA.

In DNA-UV experiments the transformation rates be- have similarly to UV-DNA experiments at low UV dosages to the recipient cells (in other words, rates using dama[r]

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BY UV SPECTROPHOTOMETRY

BY UV SPECTROPHOTOMETRY

The theoretical composition of adenovirus ONYX-015 is 87% protein and 13% DNA. The concentration of viral particles may be measured directly by UV-spectroscopy, since proteins have a UV absorbance at 277 nm due to their tryptophan and tyrosine content, and DNA has an absorbance maximum at 260 nm. Intact viral particles have a diameter between 65 to 85 nm. Their high organization and potential aggregation state cause light scattering which can bias the UV-measurement. In this assay, 0.1% SDS disassembles the virus into its component proteins and DNA. The UV-absorbance of the lysed virus in SDS is measured at 320 nm for the baseline and reference, at 260 nm for its DNA content and at 280 nm for its protein content. The viral particle concentration is calculated using a method described by Maizel, et al. In this method, an absorbance of 1.00 AU (1 cm pathlength) at 260 nm corresponds to 1.1 x 10 12 viral particles/mL. 4. REFERENCES
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UV Spectroscopy.pptx

UV Spectroscopy.pptx

It is defined as any isolated covalently bonded group that shows a characteristic absorption in the ultra-violet or the visible region.. Auxochrome.[r]

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Determination of the usage of shade structures via a dosimetry technique

Determination of the usage of shade structures via a dosimetry technique

Researchers have modeled the annual erythemal exposures (8-11) and the UV exposures during normal daily activities (for example 12-14). The protection from UV radiation provided by different types of shade structures has been demonstrated (15, 16) and the reduction in UV exposure to a horizontal plane and a vertical plane under shade structures in New Zealand primary schools has been reported (17). A study employing polysulphone dosimeters on the left shoulder of year 1 school children measured the amount of shade use on this age group (18).
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Method Development and Validation for Quantitative Estimation of Calcium Acetate in Calcium Acetate Capsules by RP-HPLC using Indirect UV Method

Method Development and Validation for Quantitative Estimation of Calcium Acetate in Calcium Acetate Capsules by RP-HPLC using Indirect UV Method

Calcium acetate structure does not have any chro- mophore, hence it does not shows any absorbance in UV-Visible range. The literature survey revealed that calcium acetate assay in active pharmaceutical ingredi- ent and tablets has been reported by titrimetry in United State Pharmacopoeia. 4 The atomic absorption spectros-

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Sea ice protects the embryos of the Antarctic sea urchin Sterechinus neumayeri from oxidative damage due to naturally enhanced levels of UV B radiation

Sea ice protects the embryos of the Antarctic sea urchin Sterechinus neumayeri from oxidative damage due to naturally enhanced levels of UV B radiation

The cost of prevention and/or repair of oxidative damage could be a very important life history trade-off for organisms living in the Antarctic marine ecosystem. Moreover, S. neumayeri embryos require 20 days of development after fertilisation before the resultant larvae are capably of feeding (Bosch et al., 1987) during which time they are totally dependent on stored reserves for growth and development. Thus any relocation of resources from growth and development to the prevention or repair of oxidative damage could significantly influence larval fitness and/or survivability. In response to increased ROS levels, developing embryos could be required to invest valuable cellular resources to prevent oxidative damage, but this is likely to have consequences for other important traits (Monaghan et al., 2009). In conclusion, basal levels of oxidative damage and antioxidant enzyme activities in S. neumayeri embryos were within the range of values published for other marine invertebrates. In embryos exposed to UV-B under open water conditions antioxidant enzyme activities increased, but not enough to prevent a significant increase in oxidative damage and developmental abnormalities. The amount of oxidative damage was dependent upon ambient UV-B levels and increased as the ozone hole moved over the study site. Embryos protected from UV-B by sea ice showed little oxidative damage with few developmental abnormalities, directly attributable to UV- B. Our results suggest that normal development of sea urchin embryos could require the presence of sea ice, which acts as a UV- B screening filter, protecting the embryos from potentially damaging increases in UV-B. As embryos represent a key life-history stage, lower survival rates caused by increased UV-B as a result of the ozone hole and significant reductions in protective sea ice coverage brought about by global warming, could reduce the long-term viability of affected populations and potentially have a significant impact on the sensitive Antarctic marine ecosystem. Sea urchin embryos could therefore be an ideal indicator species for the potential impact of climate change on Antarctic marine invertebrates.
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PLASMONIC LAYERED NANOSTRUCTURES FOR DEEP UV-UV BIOSENSING

PLASMONIC LAYERED NANOSTRUCTURES FOR DEEP UV-UV BIOSENSING

431 | P a g e biocompatibility. As compared to gold, silver based nanosensors are known for their narrow spectral width and high detection accuracy. But due to interband activity, both Au and Ag are plasmonically inactive in UV region, where most of the nucleic acids, directed at the four DNA bases adenine (A), cytosine (C), guanine (G) and thymine (T) shows strong absorption band [5]. Therefore, we propose Al as a strong plasmonic active material which supports long-lived LSPRs with high optical cross-sections tunable over a wide energy range, deep into the UV, for sensing applications in the shortest wavelength range which are generally not possible with other metal nanoparticles [6,7]. But the problem with Ag and Al metals, however, is that they easily oxidized in aqueous medium. In contrast to silver, the process is self-limiting in Aluminium giving a stable oxide thickness, which makes it easy to work with even in atmospheres containing oxygen [7,8]. In this paper, the strategies using Au coated bimetallic core-shell and multilayered nanostructure have been proposed to maintain the stability of the Al & Ag nanostructure. We studied the effect of core material and thickness of the shell on Ag and Al coated metallic nanosphere. The three chosen metals Al, Ag and Au constitute an excellent model system where the interband activity varies greatly covering entire UV-NIR region of EM spectrum.
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Usage of the polyphenylene oxide dosimeter to measure annual solar erythemal exposures

Usage of the polyphenylene oxide dosimeter to measure annual solar erythemal exposures

the second series (Measurement B) ran in late autumn from 29 April 2008 to 27 May 2008. One dosimeter was used to obtain pre and post absorbance data for each time point in these trials. The dosimeters were left out for approximately seven hours each day. The response of the dosimeters in these series was calibrated to the erythemal solar UV dose (12) with respect to the horizontal plane. The total solar UV dose measured by the Solar Light UV broadband meter was obtained by measuring the amount of solar UV incident on the dosimeters each day. As soon as the dosimeters were exposed to the sunlight in the morning the Solar Light UV broadband meter was turned on. After the seven hour measurement session had been completed in the afternoon the Solar Light UV broadband meter was turned off. At the end of the measurement series, the seven hour daily total dosages were added together in order to produce the total erythemal solar UV dose. A single filtered dosimeter (with an attached NDF) was removed from solar exposure every second day and a single unfiltered (without an attached NDF) dosimeter was removed from solar exposure each day during the measurement campaign. For the early autumn readings, the last remaining filtered and unfiltered dosimeters were left out until they were dark orange in colour, which for PPO film is a visual indication that complete optical saturation is about to take place. For the late autumn readings, the final filtered and unfiltered dosimeters were removed before the beginning of winter. Eleven unfiltered and eight filtered dosimeters were used in the early autumn measurements. Ten unfiltered and eight filtered dosimeters were used in the late autumn measurements. A spectrophotometer (model 1601, Shimadzu Co., Kyoto, Japan) was used to measure pre and post exposure absorbance data for the dosimeters at an optimal wavelength of 320 nm as specified in previous studies (1, 2, 3, 4). Across both of the Measurement trials, local cloud coverage ranged from 0 to 8 oktas.
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<p>Six critical questions for DNA repair enzymes in skincare products: a review in dialog</p>

<p>Six critical questions for DNA repair enzymes in skincare products: a review in dialog</p>

The enzyme they used, T4 endonuclease V, speci fi cally recognizes one class of UV-induced DNA damage, called cyclobutane pyrimidine dimers (CPD) and repairs DNA by catalyzing two reactions: the fi rst uses glycosylase, which releases thymine and causes an apurinic site; the second involves AP lyase, which incises the phosphodiester back- bone at the site of the missing base, causing a single- stranded break. The host cell supplies the exonuclease that then removes bases around this site, and a polymerase fi lls the gap, thereby repairing the photodamaged DNA. 12 A similar enzyme UV endonuclease from the bacteria Micrococcus luteus also stimulates the excision repair process when introduced into mammalian cells. 13
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Research and Design of Embedded Vehicle Monitoring System Based on Web Technology

Research and Design of Embedded Vehicle Monitoring System Based on Web Technology

ABSTRACT: Embedded systems are pervasive in the infrastructure of our society for diverse tasks. In this project, we research and design an embedded Vehicle Monitoring system based on Web Technology. To achieve this purpose, we use Level Sensor, Pressure Sensor, Tilt Sensor, Gas Sensor, and Alcohol Detector. By these sensors, we check the various parameters of the vehicle system such as Liquid Level, State of Vehicle, Pollution by Vehicle, alcoholic taste of driver etc. These sensors provide the information to the Arduino (ATMEGA 328P-P0). We use Pentium 4 Processor in this project. To monitor the parameters, we use Web Technology.
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How To Build A Hybrid Fusion Module

How To Build A Hybrid Fusion Module

IMM (Interacting Multiple Models) : Embedded architecture Interface Sensor Interface Interface Sensor Sensor Interface Sensor Interface Interface Sensor Sensor Interface Sensor Interface[r]

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Ozone depletion and increased UV-B radiation: is there a real threat to photosynthesis?

Ozone depletion and increased UV-B radiation: is there a real threat to photosynthesis?

et al., 1983; Renger et al., 1989; Kulandaivelu et al., 1991; UV-B-induced inhibition of mature leaf photosynthesis Melis et al., 1992). Consequently, in many reviews PSII in many plant species was demonstrated over 20 years damage has often been implicated as the major potential ago ( Van et al., 1976; Basiouny et al., 1978). It is evident limitation to photosynthesis in UV-B irradiated leaves that UV-B can potentially impair the performance of all (Bornman, 1989; Caldwell et al., 1989; Stapleton, 1992; three main component processes of photosynthesis, the Teramura and Sullivan, 1994; Fiscus and Booker, 1995), photophosphorylation reactions of the thylakoid mem- as is the case in the photoinhibition of photosynthesis by brane, the CO
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