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uses of visible light in medicine

For this, the sample is put in a UV chamber and observed. Thanks for asking eh ! The exposure to UV light is called as photo-therapy. It’s something Enwemeka and his colleagues at UWM are determined to accomplish. Enwemeka agrees, but says that UWM research is moving phototherapy closer to mainstream acceptance. For example, there is an increase in the messages exchanged between mitochondria and the cell’s nucleus resulting in a boost in the mitochondria’s output of ATP, a molecule that increases the cell’s energy. It was Karu who determined that far-red and NIR light, applied using low-intensity lasers, acts on organelles of human cells known as mitochondria. “If you can tone down the inflammation in a non-healing wound, like a pressure ulcer, you speed the healing.”. The exposure to UV light is called as photo-therapy. “If a cell becomes diseased or dysfunctional, the mitochondria send out signals which tell the cell to self-destruct in an organized fashion—so that it doesn’t take out its neighbors at the same time.”. The spectrophotometers employ UV light to detect and measure the concentration of a given sample in liquid form. It can cause chemical reactions and make other substances to a florescence. You would have notice presence of UV ray screen on the door entrances in hospitals and other sterile areas. How can blue light both destroy and generate cells simultaneously? Vitamin D formation: Vitamin D is a type of vitamin that needs not to be consumed from food. Air purification: Air is composed of organic debris, carbon monoxide, and even some microbes. This saves us from the harmful effect of UV light from the sun. Even newborn babies can have jaundice due to the break down of hemoglobin. I saw a unit being used down the aisle of an airliner to cleanse the inside of the plane instead of spraying. Known as phototherapy, the use of light in medical treatment is producing surprisingly successful results in the treatment of a variety of ailments from topical infections and chronic wounds to autoimmune and chronic degenerative diseases, says Chukuka S. Enwemeka, dean of the University of Wisconsin–Milwaukee’s College of Health Sciences. UWM researchers have built upon the work of Tiina Karu at the Russian Academy of Laser Sciences. Would any one like to guess? This air can be purified by UV radiation. “We started irradiating damaged cells in cultures and found what appeared to be a ‘sweet spot’ in terms of dosage,” says Janis Eells, UWM professor of biomedical sciences who studies how NIR light helps to slow degenerative eye disease. These lamps give a strong effect of ultraviolet energy which makes them excellent for sanitizing the air and killing germs and bacteria. Performing Arts Medicine Program Performing Artfully in Medicine, Wisconsin Academy of Sciences, Arts & Letters. Read about our approach to external linking. But given its relative ease of application, blue light therapy holds tremendous promise as an alternative to full-spectrum antibiotics, many of which are decreasing in efficacy. Sorry, this clip is not currently available, Chemical warfare during the First World War. Hi Eric, for closed baggage sterilization, I think ionizing radiation would be effective UV radiation. In Medicine: For certain skin diseases like psoriasis and other skin conditions, the prolonged exposure to  UV light is better therapy. This means this radiation has greater energy than normal visible light. Humans are exposed to so many antibiotics—through food sources and careless use of prescribed medications—that bacterial resistance is now rising much faster than the rate of new drug discovery. Enwemeka suggests that blue light also acts on cytochrome c oxidase in the cells’ mitochondria—like NIR light—but in this case causes the cytochrome to pair up with nitric oxide, creating a toxic environment for bacteria. Otto creates promotional material, engages with media, and writes articles about the University, generating content in the areas of science, technology, commercialization, and architecture. What if there was a way to treat debilitating diseases without drugs or surgery? Why doesn’t the blue light also kill the cells of the human host cells? UV light in the sun is key for the formation of Vitamin D. Thus the formed Vitamin-D helps the storage of calcium in the bones and thereby strengthen them. UV radiation has enough energy to kill the microbes and also destroys the organic debris and carbon monoxide. UV is light energy with the wavelengths in the range of 10 to 400nm. “But suppose that the [tissue] layer is thick,” says Enwemeka. The two are developing new technology that will allow blue light’s wavelength to penetrate skin—and dense bacterial colonies—more deeply, the way NIR light can, but without increasing dosage. The use of endoscopes in diagnosis is described before Photodynamic Therapy (PDT) is explained. Eric Bertram. Lyons, for instance, has tested phototherapy as a method of controlling the severity of multiple sclerosis, an autoimmune disease that causes progressive paralysis—interrupting vision, balance, and even thought processes by destruction of nerve cells and the spinal cord. Besides these certain plant extracts and chemicals are stained or have inherent dyes that make them detectable when kept in the UV environment. This UV light produces enough heat to attract insects and trap them. She says that it is a concept that makes perfect sense, when you consider that “mitochondria are similar to chloroplasts in plants, which absorb red and blue wavelengths of light and use the light energy to make chemical energy [during] photosynthesis.”, Eells, who has great admiration for the complex ways in which mitochondria behave and communicate with the rest of the cell, says that these organelles do far more than simply produce energy for cells. Enwemeka demonstrated that one dose of blue light irradiation killed as much as 92% of two pervasive MRSA strains. In Medicine: For certain skin diseases like psoriasis and other skin conditions, the prolonged exposure to UV light is better therapy. An accumulation of too many creates what’s called “oxidative stress” and will damage other components of the cell, such as proteins and DNA. Antioxidants also work to clean up free radicals, highly chemically reactive molecules that can bond to and alter other molecules in destructive ways related to aging and cancer. This includes phototherapy experiments that help researchers better understand the cellular processes involved. NIR light removes that obstacle,” says Eells. A mammalian cell contains thousands of mitochondria, protein “machines” in charge of converting the energy in the food we eat into a form of chemical energy that the cell can use. Importance of Education in Life & Society, Cells in the Human Body | 14 Types with Examples and Functions, Organs of the body | Their Locations and Internal Functions, 14 Uses of Plants & their Importance to Humans & Nature, 10 Types of Chromatography | Based on Different Techniques & Methods, Grammarly Premium Review | A Complete Writing Assistant, Types of Pollution | Their Causes and extent of Damage, 9 Different Types of Spectroscopy Techniques & their Uses, 15 Secreting Organs in Human Body | Their ListLocations & Functions, 6 Types of birds | Scientific Classification with Characters & Pictures, 5 Special Sense Organs | Their Location and Functions in the Body. The goal is to achieve complete bacterial eradication in a wound. Sterilization of substances: UV radiation is a type of dry heat method of sterilization. Low-level light therapy has also been implicated in activating genes involved in programmed cell death and in the stress response generated by too many free radicals. In order to view the full content, please disable your ad blocker or whitelist our website www.worldscientific.com. But it cannot be seen with naked eyes unlike visible light. “We are conducting dose-response experiments now to determine the optimal dose of light.”, Last year, Eells and a team of collaborators conducted a wound-healing study in spinal cord injured veterans who, because of being bedridden and inactive, developed pressure ulcers, or bedsores, that wouldn’t heal. The ozone layer on the surface of the earth prevents them from reaching the earth to a large extent. This UV stream kills microbes present on human surfaces  while entering the concerned rooms. So employing a UV light source can help purify the air around. Thus UV light helps in the analysis and research of many chemical and biological substances. Their research with cells in culture has shown that blue light exposure increases growth factors, which leads to proliferation of fibroblasts, a type of connective tissue cell that plays a role in wound healing. But it may have to do with differences in the photosensitive molecules present in bacteria versus mammalian cells. What about airport baggage also? Work by the UWM researchers focuses on wavelengths of light that lie in two regions of the electromagnetic spectrum: longer wavelengths in the far-red to near-infrared (NIR) region and shorter wavelengths in the visible blue region of the spectrum. Now the question is, ‘will using a higher dosage kill more normal cells along with the bacteria?’ ”. Light is energy, a kind of radiation consisting of photons whose individual energy levels correspond to specific wavelengths. “In that case, you have to increase the dosage [to reach all the bacteria]. This is a kind of communication technology in which data can be transmitted at a speed of 10kbit/s. In recent research, Enwemeka found that in higher doses, treatment with blue light yielded a completely unexpected result: While some human cells are destroyed by irradiation along with much of the bacteria, a greater percentage of human cells appear to multiply. To trap insects: Insect trap instruments have UV light emitters. White light lies between ultraviolet radiation and near red and infrared radiation. Hospitals use UV germicidal lamps for sterilizing surgical instruments and even the air in operating rooms. This dosage, which stimulated repair in the cultured cells, was also shown to be effective in animal models of disease. Enwemeka’s team hypothesizes that both cell proliferation and cell death can occur together if there is more response in the genes controlling cell death than in those that stimulate growth factors. He has also seen what he describes as astonishing results at a clinic he works with in Brazil where the blue light, combined with NIR light, is used to treat chronic wounds like diabetic ulcers.

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