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Electromagnetic Radiations With Respect to Cell Phone TowerSadaf Liaquat
This document discusses electromagnetic radiation from cell phone towers and their potential health effects. It provides an overview of how cell phone towers work and transmit electromagnetic waves. It then summarizes several peer-reviewed scientific studies that have found adverse health effects like headaches, sleep disturbances, concentration difficulties, and increased cancer rates in populations living near mobile phone towers. The document also notes that children, pregnant women, and pacemaker users may be at higher risk. It concludes by discussing bans on cell phone towers in some areas and references several studies examining the biological effects of electromagnetic radiation.
Radiation pattern of a cell tower antennaNeha Kumar
Radiation Pattern from the cell tower Antenna has been drawn for basic understanding of a radiation pattern.
Page1:
This diagram was mainly used to describe why on a certain building the radiation levels vary from one apartment(say 7th floor) to the apartment above or below (6th and 8th floor) in a building at Khar (West), Mumbai.
The radiation pattern of a cell tower antenna is defined by its lobes. Radiation will be highest from the primary lobes in the horizontal direction. There is also radiation from secondary lobes.As seen in the figure, the readings that will be taken in between the lobes will be much lesser.
As seen the figure, the radiation will also be high vertically downward from the secondary lobes. This is what most mobile operaters hide or are not aware of in India.
Page 2:
Distance is another critical factor. The power density varies by (1/R2), where is R is the distance. People living within 50-300meter radiaus are in the high radiation zone. This data has been taken from a another country outside India. In the US for example, residential areas generally have amplifiers of 1-2 W. However in India, in many places even 100 to 200W of amplifiers are used and their are clusters of antennas from multiple operators on the roof top of several residential and office premises.
Page 3:
Simulated radiation pattern of a cell tower antenna from Prof. Girish kumar, IIT Bombay.
Page 4:
USHA KIRAN BUILDING - several cancer cases
Through the help of the above typical radiation pattern, let’s analyze the news reported in Mid-day, Mumbai dated Jan. 3, 2010, which stated - “Mumbai's swanky Usha Kiran building says the four cancer cases there could be linked to mobile towers installed on the facing Vijay Apartments”. The picture taken from the Usha Kiran building of the several antennas installed on the seventh floor of Vijay Apartments is shown in Fig. pn Page 4. People living in the 6th, 7th and 8th floor in the opposite building will get maximum radiation as they are in the main beam direction. People living on the other floors will receive lesser radiation as beam maxima is reduced considerably as can be observed from vertical radiation pattern. In the horizontal direction again, people living in the front side of the antenna will receive much higher radiation compared to people living in the back side of antenna.
http://www.mid-day.com/news/2010/jan...
Recently (as on Jan 2011) two more cancer cases have been reported on the 5th and on the 10th floor.
A photomultiplier tube is an extremely sensitive light detector that can resolve single photons. It works by multiplying the small current produced by incident light up to 108 times through a process called secondary emission using a photocathode, dynodes, and anode. This allows even tiny and normally undetectable currents to become much larger and measurable. Compared to a phototube, a photomultiplier tube multiplies the electrons emitted from the photocathode, providing much higher gain and allowing it to be used for very low light signals. Photomultiplier tubes cost between $175-300 depending on their specifications and are used in applications requiring high sensitivity light detection.
The document discusses the history and components of wireless power transmission using microwaves. It describes technologies developed at MIT media labs in 1997 to transmit power using electromagnetic waves. It outlines the key parts of wireless power systems including transmitters, receivers, antennas and discusses applications in charging phones and devices without wires. It proposes this as a novel method to deliver power where facilities are not available.
This document proposes wirelessly charging mobile phones using microwaves transmitted from a transmitter. A rectenna and filter would be added to phones to convert microwave energy from a 2.45 GHz signal into electrical current to charge the battery. The system would allow phones to charge automatically as users talk without needing physical connections or being dependent on manufacturer or battery type. It describes the transmitter, slotted waveguide antenna, receiver design including the rectenna, sensor circuitry, and principle of operation where microwaves carrying a message signal would be received and converted to DC power by the rectenna to charge the phone. Potential implementations and advantages like remote charging and electricity savings are discussed alongside challenges like dependence on network coverage and slow charging rates.
This document proposes a method for wirelessly charging mobile phones using microwaves. It describes a transmitter that would use a magnetron to transmit a 2.45 GHz microwave signal along with a message signal. At the receiver, a rectenna containing a Schottky diode would convert the microwave energy to DC power to charge the phone. While this could eliminate wired charging, it may also present health and cost risks due to the necessary power levels and components.
This document summarizes the use of radiation to control microbial growth. It discusses different types of radiation including gamma rays, X-rays, and ultraviolet radiation. It explains that ionizing radiation like gamma rays can damage the DNA or RNA of microorganisms, killing the cells. Non-ionizing radiation like ultraviolet light is also effective at reducing microbial populations when emitted by germicidal lamps commonly used in hospitals and food industries. The document provides an overview of radiation as a method for inhibiting microbial growth through destruction of genetic material.
The document summarizes an experiment investigating the photoacoustic effect. The experiment tested whether different wavelengths of visible light produce sound when hitting a photovoltaic cell connected to a speaker. As hypothesized, all wavelengths produced sound but ultraviolet light produced the loudest sound, having the highest energy. The conclusion was that higher energy light produces greater decibel levels of sound through the photoacoustic effect.
Electromagnetic Radiations With Respect to Cell Phone TowerSadaf Liaquat
This document discusses electromagnetic radiation from cell phone towers and their potential health effects. It provides an overview of how cell phone towers work and transmit electromagnetic waves. It then summarizes several peer-reviewed scientific studies that have found adverse health effects like headaches, sleep disturbances, concentration difficulties, and increased cancer rates in populations living near mobile phone towers. The document also notes that children, pregnant women, and pacemaker users may be at higher risk. It concludes by discussing bans on cell phone towers in some areas and references several studies examining the biological effects of electromagnetic radiation.
Radiation pattern of a cell tower antennaNeha Kumar
Radiation Pattern from the cell tower Antenna has been drawn for basic understanding of a radiation pattern.
Page1:
This diagram was mainly used to describe why on a certain building the radiation levels vary from one apartment(say 7th floor) to the apartment above or below (6th and 8th floor) in a building at Khar (West), Mumbai.
The radiation pattern of a cell tower antenna is defined by its lobes. Radiation will be highest from the primary lobes in the horizontal direction. There is also radiation from secondary lobes.As seen in the figure, the readings that will be taken in between the lobes will be much lesser.
As seen the figure, the radiation will also be high vertically downward from the secondary lobes. This is what most mobile operaters hide or are not aware of in India.
Page 2:
Distance is another critical factor. The power density varies by (1/R2), where is R is the distance. People living within 50-300meter radiaus are in the high radiation zone. This data has been taken from a another country outside India. In the US for example, residential areas generally have amplifiers of 1-2 W. However in India, in many places even 100 to 200W of amplifiers are used and their are clusters of antennas from multiple operators on the roof top of several residential and office premises.
Page 3:
Simulated radiation pattern of a cell tower antenna from Prof. Girish kumar, IIT Bombay.
Page 4:
USHA KIRAN BUILDING - several cancer cases
Through the help of the above typical radiation pattern, let’s analyze the news reported in Mid-day, Mumbai dated Jan. 3, 2010, which stated - “Mumbai's swanky Usha Kiran building says the four cancer cases there could be linked to mobile towers installed on the facing Vijay Apartments”. The picture taken from the Usha Kiran building of the several antennas installed on the seventh floor of Vijay Apartments is shown in Fig. pn Page 4. People living in the 6th, 7th and 8th floor in the opposite building will get maximum radiation as they are in the main beam direction. People living on the other floors will receive lesser radiation as beam maxima is reduced considerably as can be observed from vertical radiation pattern. In the horizontal direction again, people living in the front side of the antenna will receive much higher radiation compared to people living in the back side of antenna.
http://www.mid-day.com/news/2010/jan...
Recently (as on Jan 2011) two more cancer cases have been reported on the 5th and on the 10th floor.
A photomultiplier tube is an extremely sensitive light detector that can resolve single photons. It works by multiplying the small current produced by incident light up to 108 times through a process called secondary emission using a photocathode, dynodes, and anode. This allows even tiny and normally undetectable currents to become much larger and measurable. Compared to a phototube, a photomultiplier tube multiplies the electrons emitted from the photocathode, providing much higher gain and allowing it to be used for very low light signals. Photomultiplier tubes cost between $175-300 depending on their specifications and are used in applications requiring high sensitivity light detection.
The document discusses the history and components of wireless power transmission using microwaves. It describes technologies developed at MIT media labs in 1997 to transmit power using electromagnetic waves. It outlines the key parts of wireless power systems including transmitters, receivers, antennas and discusses applications in charging phones and devices without wires. It proposes this as a novel method to deliver power where facilities are not available.
This document proposes wirelessly charging mobile phones using microwaves transmitted from a transmitter. A rectenna and filter would be added to phones to convert microwave energy from a 2.45 GHz signal into electrical current to charge the battery. The system would allow phones to charge automatically as users talk without needing physical connections or being dependent on manufacturer or battery type. It describes the transmitter, slotted waveguide antenna, receiver design including the rectenna, sensor circuitry, and principle of operation where microwaves carrying a message signal would be received and converted to DC power by the rectenna to charge the phone. Potential implementations and advantages like remote charging and electricity savings are discussed alongside challenges like dependence on network coverage and slow charging rates.
This document proposes a method for wirelessly charging mobile phones using microwaves. It describes a transmitter that would use a magnetron to transmit a 2.45 GHz microwave signal along with a message signal. At the receiver, a rectenna containing a Schottky diode would convert the microwave energy to DC power to charge the phone. While this could eliminate wired charging, it may also present health and cost risks due to the necessary power levels and components.
This document summarizes the use of radiation to control microbial growth. It discusses different types of radiation including gamma rays, X-rays, and ultraviolet radiation. It explains that ionizing radiation like gamma rays can damage the DNA or RNA of microorganisms, killing the cells. Non-ionizing radiation like ultraviolet light is also effective at reducing microbial populations when emitted by germicidal lamps commonly used in hospitals and food industries. The document provides an overview of radiation as a method for inhibiting microbial growth through destruction of genetic material.
The document summarizes an experiment investigating the photoacoustic effect. The experiment tested whether different wavelengths of visible light produce sound when hitting a photovoltaic cell connected to a speaker. As hypothesized, all wavelengths produced sound but ultraviolet light produced the loudest sound, having the highest energy. The conclusion was that higher energy light produces greater decibel levels of sound through the photoacoustic effect.
The document discusses sources of background radiation that people are exposed to on a daily basis. It states that the largest sources of radiation exposure are cosmic rays, radon gas inhaled from the air, radioactive potassium-40 from food, and gamma rays from rocks and building materials. The document also notes that while radiation can potentially damage DNA and cause health issues, most people live without harm from the levels of background radiation they experience.
This presentation gives an insight to effects of microwave radiation from cell phone towers around us. The impact of such towers on animals, plants & humans is discussed and some simple solutions are also presented.
Radiation comes in many forms, both natural and man-made. While some types like ionizing radiation can be harmful if exposed in high doses over long periods, radiation is also all around us in everyday life from sources like wifi, microwaves, visible light, and more. The document discusses the different types of radiation like alpha, beta, gamma, x-rays, and their varying abilities to penetrate materials. Overall, radiation is a natural phenomenon and in moderation the risks are quite low compared to other common causes of death.
A magnetron is a vacuum tube device that generates microwaves using the interaction of a magnetic field and electric field. It was invented in 1920 by Albert Hull and improved in 1940 by John Randall who invented the resonant cavity magnetron. A magnetron operates by using a magnetic field to keep electrons in a spiral motion around an anode, generating microwaves in a resonant cavity. Its main applications include use in radar systems, microwave ovens for heating, and lighting such as in sulfur lamps.
This document discusses three common problems with fluorescent tubes: 1) Energy cost - LED lights are more energy efficient than fluorescent tubes since LEDs convert 95% of energy into light while fluorescent tubes only convert 60%. 2) Maintenance cost - The operating time and frequency fluorescent tubes are turned on/off significantly impacts maintenance costs as it degrades the electrode coil and cathode shield over time. 3) Lighting performance - The performance of fluorescent tubes deteriorates over time and is affected by temperature and on/off cycles, with performance decreasing in both cold and hot environments.
This document describes the design and working of a wireless charging system for mobile phones using microwaves. It discusses how microwaves are generated at a transmitter using a magnetron and directed via an antenna. At the receiver, a rectenna converts the microwaves to DC power to charge the phone when a sensor detects an incoming call signal. While wireless charging provides convenience over wires, its implementation has higher costs and charging can be slow if the transmitter and receiver networks are not powerful enough.
Wireless electricity transmission uses microwaves to transmit power without wires over long distances. Nikola Tesla pioneered this concept in the late 1800s with experiments transmitting power wirelessly. Modern techniques would involve converting power to microwaves at a transmission station, transmitting to satellites, and receiving at rectennas on Earth to convert back to electricity. While promising reliable power delivery anywhere, challenges include the massive size of receiving stations, high costs of hundreds of satellites, and potential interference with electronics.
This document discusses waves and the electromagnetic spectrum. It begins with a bell ringer asking about amplitude, energy, and medium in waves. The objectives are to build understanding of the electromagnetic spectrum and the relationship between amplitude and energy. The agenda includes discussing electromagnetic radiation, building a wave generator, and homework. The bulk of the document defines the electromagnetic spectrum from radio waves to gamma rays, discussing their properties and uses. It also covers how amplitude is squaredly related to energy in waves. Students will add straws to a wave generator in groups to demonstrate transverse waves.
The magnetron is a device that converts electrical power into microwave radiation. It is constructed with a circular arrangement of cavities that form the anode and a central cathode. When electric and magnetic fields are applied perpendicular to each other, electrons emitted from the heated cathode follow a curved path, interacting with the anode and generating microwave radiation. Magnetrons are used in applications such as microwave ovens, radar systems, lighting, and particle accelerators. However, their operating frequency is not precisely controllable and can vary based on factors like load, current, and temperature.
Radiation can kill or change living cells. The biological effects of radiation depend on the type of radiation, the absorbing tissue, and the total absorbed energy. Different types of radiation have different effects on cells due to their varying abilities to ionize atoms. While natural background radiation exposes people to around 2 millisieverts per year, high doses from events like nuclear accidents or weapons can cause immediate illness and death due to damage to skin, blood, and other tissues. Long-term effects include increased cancer risk believed to be caused by radiation damaging DNA and altering cell reproduction.
Nuclear power corporation of india ltd. kota Aveen Meena
This document summarizes an industrial training presentation given by Lokesh Yadav at the Nuclear Power Corporation of India Ltd in Rawatbhata. It discusses the goals for nuclear power generation in India of 3,00,000 MWe by 2017, 4,00,000 MWe by 2022, and 9,50,000 MWe by 2030. It also covers topics like the difference in energy generated from various fuels, types of radiation and radioisotopes, radiation measurement instruments, and concludes that nuclear energy is no riskier than other power industries and radiation will always be part of life. The training program at NPCL was very beneficial for the presenter.
Looking for UV Light as Disinfectant? Look no further! We are the manufactures and supplier of UVC LED Light Fixtures to Kill Mold & Bacterias. Get Quote.
The document describes the Amezcua Chi Pendant 2, a mineral-based pendant made of thermal-shock resistant glass. It has seven energy circles that provide a greater enhanced energy field to improve the wearer's harmony and energy levels faster. Tests show it can neutralize negative effects of electromagnetic fields from electronic devices. The pendant is meant to combat depleted energy, recharge the body, and allow one to get on with life with more energy.
Gamma rays are a form of electromagnetic radiation emitted from radioactive decay processes. They have short wavelengths between 10-5 to 0.1 nm and high frequencies between 1020-1025 Hz. Gamma rays were discovered in 1900 by Paul Ulrich Villard and occur naturally from processes like nuclear fusion and electron-positron annihilation. They are used in medicine for radiography, CT scans, and gamma knife surgery. Gamma knife surgery uses over 200 concentrated gamma rays to destroy targeted tumor tissue without damaging surrounding brain areas. Gamma rays can also have negative effects if overexposed, like cell damage and infertility.
The new me antenna is only one percent of the smaller antennas available in s...Antenna Manufacturer Coco
The document describes a new type of micro-antenna called an ME antenna that is 100 times smaller than current small antennas. The ME antenna uses magneto-electric coupling of acoustic resonance, rather than electromagnetic resonance used in most small antennas, allowing it to be much smaller since acoustic wavelengths are smaller than electromagnetic wavelengths. The researchers designed prototypes of the ME antenna based on nano-plate resonators and thin-film bulk acoustic resonators. Testing showed the ME antenna was able to transmit and receive signals effectively. Future applications of this tiny new antenna include wireless communications, IoT devices, wearables and smartphones.
Microwave ovens heat food using 2.5 gigahertz radio waves, which are absorbed by water, fats and sugars in food and converted directly into heat. The microwaves pass through materials like glass and plastic but are reflected by metals. A microwave oven works by generating these radio waves that are absorbed by the food, causing its water and fat molecules to vibrate rapidly and generate heat while leaving other containers unaffected.
The attached narrated power point presentation mentions the different types of noise produced by laser diode sources in a fiber optic communication link. The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Ionizing radiation can effectively sterilize organisms without increasing temperature through mechanisms like producing reactive molecules that damage DNA and proteins. X-rays, gamma rays, and electron beams are common sources of ionizing radiation used for sterilization. X-rays have advantages like deeper penetration and faster processing compared to gamma rays and electron beams. Gamma rays also effectively sterilize through breaking down DNA, and are used for sterilizing medical devices and foods. UV light is another sterilization method using UVC wavelengths to damage nucleic acids and disrupt DNA/RNA of microbes. It is effective against bacteria and viruses and used for sterilizing air, water, and surfaces.
Farees mufti Stage Analytical Techniques in Biotechniologyfarees
This document summarizes the principles and applications of UV-Visible spectroscopy. It discusses how UV-Visible spectroscopy involves measuring the absorption of ultraviolet or visible light by a sample. The absorption is affected by electronic transitions in molecules, which provides information about their structure. Common applications of UV-Visible spectroscopy mentioned include quality control, surface sterilization, and stimulating natural sunlight for aging tests.
Ultraviolet Disinfection - Ummi Nuraihan Mohd RizalKhaleeda Karim
This document summarizes ultraviolet (UV) disinfection. It explains that UV disinfection uses UV light to instantly neutralize microorganisms as they pass by submerged UV lamps. The process adds no chemicals to water and has no impact on water chemistry. UV disinfection units consist of one or more UV lamps in a conduit through which water flows, separated from the lamps by a transparent material. The required UV dose depends on factors like temperature, pH, and number of microorganisms present. UV disinfection is effective against bacteria, viruses, and protozoa but more difficult for Ascaris eggs. Safety precautions are needed when operating UV disinfection units.
Ultraviolet radiation (UVR) covers a small part of the electromagnetic spectrum between visible light and X-rays. It is produced naturally by the sun and through artificial mercury vapor lamps. UVR can cause both local physiological effects like erythema (sunburn), tanning, and thickening of the epidermis, as well as general effects like vitamin D production. Therapeutically, UVR is used to treat various skin conditions like psoriasis, acne vulgaris, eczema, and infected wounds through its antimicrobial effects and ability to stimulate skin cell turnover. Precautions must be taken when using UVR to avoid dangers like sunburn, premature skin aging, and skin cancer.
A number of preservation techniques are employed to increase the shelf of food by the destruction of micro organisms and inactivation of Food enzymes that may deteriorate the quality of food. One of such technique is using of Irradiations such are U.V rays and I.R rays
The document discusses sources of background radiation that people are exposed to on a daily basis. It states that the largest sources of radiation exposure are cosmic rays, radon gas inhaled from the air, radioactive potassium-40 from food, and gamma rays from rocks and building materials. The document also notes that while radiation can potentially damage DNA and cause health issues, most people live without harm from the levels of background radiation they experience.
This presentation gives an insight to effects of microwave radiation from cell phone towers around us. The impact of such towers on animals, plants & humans is discussed and some simple solutions are also presented.
Radiation comes in many forms, both natural and man-made. While some types like ionizing radiation can be harmful if exposed in high doses over long periods, radiation is also all around us in everyday life from sources like wifi, microwaves, visible light, and more. The document discusses the different types of radiation like alpha, beta, gamma, x-rays, and their varying abilities to penetrate materials. Overall, radiation is a natural phenomenon and in moderation the risks are quite low compared to other common causes of death.
A magnetron is a vacuum tube device that generates microwaves using the interaction of a magnetic field and electric field. It was invented in 1920 by Albert Hull and improved in 1940 by John Randall who invented the resonant cavity magnetron. A magnetron operates by using a magnetic field to keep electrons in a spiral motion around an anode, generating microwaves in a resonant cavity. Its main applications include use in radar systems, microwave ovens for heating, and lighting such as in sulfur lamps.
This document discusses three common problems with fluorescent tubes: 1) Energy cost - LED lights are more energy efficient than fluorescent tubes since LEDs convert 95% of energy into light while fluorescent tubes only convert 60%. 2) Maintenance cost - The operating time and frequency fluorescent tubes are turned on/off significantly impacts maintenance costs as it degrades the electrode coil and cathode shield over time. 3) Lighting performance - The performance of fluorescent tubes deteriorates over time and is affected by temperature and on/off cycles, with performance decreasing in both cold and hot environments.
This document describes the design and working of a wireless charging system for mobile phones using microwaves. It discusses how microwaves are generated at a transmitter using a magnetron and directed via an antenna. At the receiver, a rectenna converts the microwaves to DC power to charge the phone when a sensor detects an incoming call signal. While wireless charging provides convenience over wires, its implementation has higher costs and charging can be slow if the transmitter and receiver networks are not powerful enough.
Wireless electricity transmission uses microwaves to transmit power without wires over long distances. Nikola Tesla pioneered this concept in the late 1800s with experiments transmitting power wirelessly. Modern techniques would involve converting power to microwaves at a transmission station, transmitting to satellites, and receiving at rectennas on Earth to convert back to electricity. While promising reliable power delivery anywhere, challenges include the massive size of receiving stations, high costs of hundreds of satellites, and potential interference with electronics.
This document discusses waves and the electromagnetic spectrum. It begins with a bell ringer asking about amplitude, energy, and medium in waves. The objectives are to build understanding of the electromagnetic spectrum and the relationship between amplitude and energy. The agenda includes discussing electromagnetic radiation, building a wave generator, and homework. The bulk of the document defines the electromagnetic spectrum from radio waves to gamma rays, discussing their properties and uses. It also covers how amplitude is squaredly related to energy in waves. Students will add straws to a wave generator in groups to demonstrate transverse waves.
The magnetron is a device that converts electrical power into microwave radiation. It is constructed with a circular arrangement of cavities that form the anode and a central cathode. When electric and magnetic fields are applied perpendicular to each other, electrons emitted from the heated cathode follow a curved path, interacting with the anode and generating microwave radiation. Magnetrons are used in applications such as microwave ovens, radar systems, lighting, and particle accelerators. However, their operating frequency is not precisely controllable and can vary based on factors like load, current, and temperature.
Radiation can kill or change living cells. The biological effects of radiation depend on the type of radiation, the absorbing tissue, and the total absorbed energy. Different types of radiation have different effects on cells due to their varying abilities to ionize atoms. While natural background radiation exposes people to around 2 millisieverts per year, high doses from events like nuclear accidents or weapons can cause immediate illness and death due to damage to skin, blood, and other tissues. Long-term effects include increased cancer risk believed to be caused by radiation damaging DNA and altering cell reproduction.
Nuclear power corporation of india ltd. kota Aveen Meena
This document summarizes an industrial training presentation given by Lokesh Yadav at the Nuclear Power Corporation of India Ltd in Rawatbhata. It discusses the goals for nuclear power generation in India of 3,00,000 MWe by 2017, 4,00,000 MWe by 2022, and 9,50,000 MWe by 2030. It also covers topics like the difference in energy generated from various fuels, types of radiation and radioisotopes, radiation measurement instruments, and concludes that nuclear energy is no riskier than other power industries and radiation will always be part of life. The training program at NPCL was very beneficial for the presenter.
Looking for UV Light as Disinfectant? Look no further! We are the manufactures and supplier of UVC LED Light Fixtures to Kill Mold & Bacterias. Get Quote.
The document describes the Amezcua Chi Pendant 2, a mineral-based pendant made of thermal-shock resistant glass. It has seven energy circles that provide a greater enhanced energy field to improve the wearer's harmony and energy levels faster. Tests show it can neutralize negative effects of electromagnetic fields from electronic devices. The pendant is meant to combat depleted energy, recharge the body, and allow one to get on with life with more energy.
Gamma rays are a form of electromagnetic radiation emitted from radioactive decay processes. They have short wavelengths between 10-5 to 0.1 nm and high frequencies between 1020-1025 Hz. Gamma rays were discovered in 1900 by Paul Ulrich Villard and occur naturally from processes like nuclear fusion and electron-positron annihilation. They are used in medicine for radiography, CT scans, and gamma knife surgery. Gamma knife surgery uses over 200 concentrated gamma rays to destroy targeted tumor tissue without damaging surrounding brain areas. Gamma rays can also have negative effects if overexposed, like cell damage and infertility.
The new me antenna is only one percent of the smaller antennas available in s...Antenna Manufacturer Coco
The document describes a new type of micro-antenna called an ME antenna that is 100 times smaller than current small antennas. The ME antenna uses magneto-electric coupling of acoustic resonance, rather than electromagnetic resonance used in most small antennas, allowing it to be much smaller since acoustic wavelengths are smaller than electromagnetic wavelengths. The researchers designed prototypes of the ME antenna based on nano-plate resonators and thin-film bulk acoustic resonators. Testing showed the ME antenna was able to transmit and receive signals effectively. Future applications of this tiny new antenna include wireless communications, IoT devices, wearables and smartphones.
Microwave ovens heat food using 2.5 gigahertz radio waves, which are absorbed by water, fats and sugars in food and converted directly into heat. The microwaves pass through materials like glass and plastic but are reflected by metals. A microwave oven works by generating these radio waves that are absorbed by the food, causing its water and fat molecules to vibrate rapidly and generate heat while leaving other containers unaffected.
The attached narrated power point presentation mentions the different types of noise produced by laser diode sources in a fiber optic communication link. The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Ionizing radiation can effectively sterilize organisms without increasing temperature through mechanisms like producing reactive molecules that damage DNA and proteins. X-rays, gamma rays, and electron beams are common sources of ionizing radiation used for sterilization. X-rays have advantages like deeper penetration and faster processing compared to gamma rays and electron beams. Gamma rays also effectively sterilize through breaking down DNA, and are used for sterilizing medical devices and foods. UV light is another sterilization method using UVC wavelengths to damage nucleic acids and disrupt DNA/RNA of microbes. It is effective against bacteria and viruses and used for sterilizing air, water, and surfaces.
Farees mufti Stage Analytical Techniques in Biotechniologyfarees
This document summarizes the principles and applications of UV-Visible spectroscopy. It discusses how UV-Visible spectroscopy involves measuring the absorption of ultraviolet or visible light by a sample. The absorption is affected by electronic transitions in molecules, which provides information about their structure. Common applications of UV-Visible spectroscopy mentioned include quality control, surface sterilization, and stimulating natural sunlight for aging tests.
Ultraviolet Disinfection - Ummi Nuraihan Mohd RizalKhaleeda Karim
This document summarizes ultraviolet (UV) disinfection. It explains that UV disinfection uses UV light to instantly neutralize microorganisms as they pass by submerged UV lamps. The process adds no chemicals to water and has no impact on water chemistry. UV disinfection units consist of one or more UV lamps in a conduit through which water flows, separated from the lamps by a transparent material. The required UV dose depends on factors like temperature, pH, and number of microorganisms present. UV disinfection is effective against bacteria, viruses, and protozoa but more difficult for Ascaris eggs. Safety precautions are needed when operating UV disinfection units.
Ultraviolet radiation (UVR) covers a small part of the electromagnetic spectrum between visible light and X-rays. It is produced naturally by the sun and through artificial mercury vapor lamps. UVR can cause both local physiological effects like erythema (sunburn), tanning, and thickening of the epidermis, as well as general effects like vitamin D production. Therapeutically, UVR is used to treat various skin conditions like psoriasis, acne vulgaris, eczema, and infected wounds through its antimicrobial effects and ability to stimulate skin cell turnover. Precautions must be taken when using UVR to avoid dangers like sunburn, premature skin aging, and skin cancer.
A number of preservation techniques are employed to increase the shelf of food by the destruction of micro organisms and inactivation of Food enzymes that may deteriorate the quality of food. One of such technique is using of Irradiations such are U.V rays and I.R rays
UVV oxidizing ultraviolet light uses wavelengths of 187nm to produce activated oxygen atoms that react with chemicals, odors, and VOCs, degrading them through successive oxidation into odorless and harmless byproducts. ASHRAE has expanded knowledge of ultraviolet light applications over time through research projects, technical groups, and chapters in its handbooks on ultraviolet air and surface treatment and ultraviolet lamp systems. Improving indoor air quality can utilize ultraviolet light to destroy biocontaminants and eliminate odors through irradiating indoor air and surfaces like heating and cooling coils.
The document provides information on the Model M250 ultraviolet water disinfection system from Atlantic Ultraviolet Corporation. It describes how the system uses ultraviolet lamps to produce shortwave radiation that kills bacteria, viruses, and other microorganisms in water. The system is chemical-free and provides rapid disinfection without heat. It also offers low operating costs and has been used in various industries and applications.
it describes about electron beam characteristics and applications and it outlines the following topics introduction, E-beam processing, E-beam equipment and applications.
Ultraviolet (UV) radiation has wavelengths shorter than visible light. It is emitted by the sun and can be produced artificially. UV is divided into UVA, UVB, and UVC. While overexposure can harm health, moderate UV has benefits like vitamin D production. UV is used in applications like disinfection, lithography, and forensic analysis due to its ability to cause chemical reactions and fluorescence.
This document summarizes an electrodeless UV system for water disinfection. It describes the technology, including that it uses electrodeless lamps with limitless service time compared to traditional electrodes lamps. Graphs show how UV intensity increases with power and temperature. Test results demonstrate over 3-log reduction of bacteria at an energy level of 10-3 kWh/liter within 3 seconds. The global market for UV disinfection equipment is valued at $885 million in 2011 and expected to reach $1.6 billion by 2016, with wastewater treatment being the fastest growing segment. The document proposes collaboration opportunities between the company and potential partners.
Radiation and its ocular and visual problems.pptxAl Amin
This document discusses various types of radiation and associated occupational hazards and protection methods. It describes two main types of radiation - ionizing and non-ionizing. For each type, it outlines common sources, potential ocular health effects, and recommended prevention and protection strategies like personal protective equipment, exposure limits, and administrative controls. The document emphasizes the importance of implementing radiation safety practices and protocols, especially for medical workers performing interventional procedures.
Microwave Uv - an everlasting lamp - Paul O'Callaghan, O2 Environmental Eva Davies
Innovative microwave generated Ultraviolet light disinfection technology for water treatment. Presentation by Paul O'Callaghan CEO of O2 Environmental for the British Columbia Water and Waste Association May 2006
Helios Quartz Group is a major international supplier of quartz glass processing and UV lamps. They have been family-owned since 1940 with production plants in Italy and Switzerland and offices worldwide. Helios produces various types of UV lamps including medium pressure, low pressure, amalgam, and black light lamps made from quartz glass. The lamps contain mercury and an inert gas and are used for industrial, scientific, and medical applications like curing, disinfection, and oxidation.
Ultraviolet light lies just outside the range of visible light our eyes can detect. Its wavelengths are shorter and higher energy than visible light. Even though our eyes can’t directly detect ultraviolet light, we can see its effects
Super Cure is one of the most trusted and professional brands in the energy curing industry with esteemed corporate values and a competitively successful drive. We are known as the home of supplying wide range of UV Curing lamps, IR lamps, LED Curing systems, Electronic Power supplies, and accessories for various industrial Curing applications
U.V.C. germicidal lamps emit ultraviolet radiation at 253.7 nm to efficiently kill microorganisms. They have a similar structure to fluorescent lights but use special glass to transmit UV rays. There are many suppliers of UV lamps in India that offer a range of lamps for applications from laboratories to industries. The demand for UV lamp suppliers has increased due to interest in using UVC lamps to disinfect surfaces and kill viruses like SARS-CoV-2. However, UVC can be dangerous if the lamps are not installed correctly to avoid skin and eye exposure.
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Radiation sterilization uses ultraviolet (UV) light or ionizing radiation like gamma rays and electrons to kill microorganisms. Ionizing radiation creates free radicals that damage cells, while UV radiation excites electrons and destroys cellular structure. Pharmaceutical powders are more resistant to ionizing radiation than liquids, and certain drugs like penicillin and thiamine have been effectively sterilized with ionizing radiation. UV radiation is also used in hospitals to reduce bacterial contamination and control infection.
Ultraviolet radiation is part of the electromagnetic spectrum with wavelengths from 100-400 nm. It can be divided into UV-A, UV-B, and UV-C. UV radiation has both beneficial and harmful biological effects. It can cause DNA damage in cells and increase risks of skin cancer, cataracts, and suppression of the immune system in humans. Protection from UV exposure includes limiting sun exposure during peak hours, wearing sunscreen and protective clothing, and seeking shade.
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Ultraviolet (uv) germicidal lamps suppliers in Mumbai, India
1. Ultraviolet Germicidal Lamps
It has been known over 100 years prior that Ultraviolet (UV) light has a germicidal impact. The regular
wellspring of UV light is the sun. It transmits about 10% of its energy in the UV locale. Anyway since it is
for the most part obstructed by the world's air it has no germicidal impact in our nearby climate, similar
to our home's indoor air quality or our water frameworks.
Ultraviolet is a range of light past the apparent reach. UV light is isolated into four scopes of
frequencies:
(1) Vacuum UV from 100 to 200 nanometers,
(2) UV-C from 200 to 280 nanometers,
(3) UV-B from 280 to 315 nanometers, and
(4) UV-A from 315 to 400 nanometers.
The UV-C range (200 to 280 nanometers) is the most deadly frequency for microorganisms, since it
disturbs the substance connections between the molecules which, in biological terms, results in a
"dead" microorganism. This scope of frequencies is otherwise called the Germicidal Spectrum. The
germicidal range is utilized to obliterate bacteria, mold, viruses and other biological contaminants in the
air, in liquids, or on surfaces.
UV light can be misleadingly created by UV Lamps. UV Lamps are ordinarily alluded to as Germicidal
Lamps. Germicidal UV lamp purging has a long history and it is broadly utilized for air cleaning, water
treatment and surface disinfection purposes. It is a savvy, harmless to the ecosystem arrangement. Its
adequacy is straightforwardly identified with intensity and openness time. Ultraviolet germicidal lamps
are low pressing factor mercury fume lamps that are producing ultraviolet light by electrical release. The
delivered electromagnetic energy (UV light) has a deadly impact to microorganisms. Ultraviolet light is
utilized in industrial and residential applications to purify water, air and surfaces.
2. The adequacy of UV Lamp is restricted by encompassing temperature in light of the inherent attributes
of the mercury. The most ideal encompassing temperature range for standard low pressing factor UV
lamp is between 65-85 °F or 18-29 °C. This implies that if the surrounding temperature goes beneath or
over this reach the adequacy of the UV light intensity decreases. Depending on the application the UV
lamps are typically ensured inside of a glass tube to keep away from enormous temperature changes.
The amalgam innovation in ultraviolet lamps empowers ideal mercury fume pressure at more extensive
temperature range between 35-120 °F or 2-49 °C. In the Amalgam Ultraviolet Lamps the mercury is
alloyed with Indium forming an amalgam of the two metals. The amalgam is set along the inside pivot of
the quartz tube. This gives the ideal mercury fume pressure at higher lamp temperatures. The
advantage is that the UV yield intensity of the amalgam lamp isn't influenced when the encompassing
water temperature fluctuates over an enormous temperature range. Water temperature will fluctuate
in any run of the mill Water Treatment Plant mainly because of weather conditions and stream rates.
Maintaining a steady yield over a huge encompassing temperature range is basic to the exhibition of an
UV framework since, supposing that the intensity of the ultraviolet lamp falls, the execute paces of
microorganisms will decrease significantly.