{"id":57948,"date":"2021-05-29T13:48:38","date_gmt":"2021-05-29T08:18:38","guid":{"rendered":"https:\/\/newsmakhani.com\/?p=57948"},"modified":"2021-05-29T13:48:38","modified_gmt":"2021-05-29T08:18:38","slug":"a-natural-dye-extract-may-protect-our-eyes-from-harmful-laser","status":"publish","type":"post","link":"https:\/\/newsnarad.com\/hi\/a-natural-dye-extract-may-protect-our-eyes-from-harmful-laser\/","title":{"rendered":"A natural dye extract may protect our eyes from harmful laser"},"content":{"rendered":"

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Delhi 29 MAY 2021<\/span><\/h2>\n<\/div>\n

Scientists have found that the natural indigo dye extracted from leaves of a plant of the bean family is capable of protecting\u00a0human eyes from harmful laser radiation. It could be used to develop optical limiters useful in weakening the potentially harmful radiation and\u00a0protecting the human eyes or other sensitive optical devices from accidental damage in an environment where such lasers are in use.<\/p>\n

The blue dye extracted from\u00a0Indigoferatinctoria\u00a0<\/em>or the\u00a0famed Indigo plants has been used over the years to colour clothes and clothing materials. Although synthetic indigo dyes are now available, the natural variety also is in common use.\u00a0It is extracted from the leaves of the plant, following standard protocols in scientific laboratories.<\/p>\n

Researchers from the\u00a0 Research Institute (RRI), Bengaluru, and Kensri School and College, Bengaluru, studied the optical properties of the natural Indigo dye and found that it can act as a device to protect human eyes from harmful laser radiation. The study, funded by the Department of Science and Technology, Government of India, was published in the journal \u2018Optical Materials\u2019<\/em>.<\/p>\n

The researchers extracted the dye and stored it in a refrigerator below 4\u00ba Celsius to preserve its natural properties. Their study on\u00a0how much it absorbed light at different wavelengths of the electromagnetic spectrum showed\u00a0that\u00a0the absorption is\u00a0maximum in the ultraviolet region of the spectrum, at\u00a0a\u00a0wavelength close to\u00a0288 nanometres, and in the visible region, close to 660 nanometres.\u00a0The absorption is comparatively high for the green light as well.\u00a0\u201cIndigo absorbs light because of\u00a0molecular absorption bands.\u00a0The maximum absorption wavelength can vary over several nanometers depending on the dye\u2019s solvent and concentration,\u201d explains Reji Philip, professor at RRI and a co-author of the study.\u00a0The absorption\u2019s variation with wavelength indicated that chlorophyll, an organic compound that takes part in photosynthesis, is present in the dye.<\/p>\n

The researchers wanted to study whether the organic dye showed additional absorption when the input light intensity is high.<\/p>\n

<\/a>The\u00a0team\u00a0found that when they increase the intensity of the laser pulse, the dye absorbs more light. That is, it\u00a0is\u00a0more opaque\u00a0to higher intensity light. Scientists refer to such materials as an \u2018optical limiter\u2019.<\/a><\/p>\n

<\/a>Optical limiters are useful in weakening the potentially harmful radiation emitted by powerful lasers and protecting both eyes and sensitive optical instruments. \u201cMaking a prototype optical limiter using natural\u00a0Indigo is the next logical step, followed by a commercially viable product,\u201d Reji pointed out.<\/p>\n

 <\/p>\n

The Indigoferatinctoria plant.
\n[Image Credits:\u00a0Wikimedia Commons<\/a>\u00a0\/ CC BY-SA 3.0]<\/p>\n

Publication link:https:\/\/doi.org\/10.1016\/j.optmat.2021.110925<\/a><\/p>\n

Author(s) of the research\/study: Beryl Chandramohan Dasa<\/sup>, Niranjan Rejib<\/sup>, Reji Philipa<\/sup>\u00a0\u2013\u2013
\na<\/sup>\u00a0Ultrafast and Nonlinear Optics Lab, Light and Matter Physics Group, Raman Research Institute, Bangalore, 560080,b<\/sup>Kensri School and College, Mariya Street, Mariyana Palya, Bangalore, 560024<\/p>\n

For more details,\u00a0Reji Philip (reji@rri.res.in<\/a>) can be contacted.<\/p>","protected":false},"excerpt":{"rendered":"

\u0915\u094d\u0937\u092e\u093e \u0915\u0930\u0947\u0902, \u092f\u0939 \u0938\u092e\u093e\u091a\u093e\u0930 \u0906\u092a\u0915\u0947 \u0905\u0928\u0941\u0930\u094b\u0927 \u0915\u0940 \u092d\u093e\u0937\u093e \u092e\u0947\u0902 \u0909\u092a\u0932\u092c\u094d\u0927 \u0928\u0939\u0940\u0902 \u0939\u0948\u0964 \u0915\u0943\u092a\u092f\u093e \u092f\u0939\u093e\u0901 \u0926\u0947\u0916\u0947\u0902\u0964 Delhi 29 MAY 2021 Scientists have found that the natural indigo dye extracted from leaves of a plant of the bean family is capable of protecting\u00a0human eyes from harmful laser radiation. It could be used to develop optical limiters useful […]<\/p>\n","protected":false},"author":13,"featured_media":57956,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1563,109,122],"tags":[29973,29974,29971,29970,29975,29972],"class_list":["post-57948","post","type-post","status-publish","format-standard","has-post-thumbnail","category-health","category-national","category-news","tag-https-doi-org-10-1016-j-optmat-2021-110925","tag-rejirri-res-in","tag-indigoferatinctoria","tag-natural-dye-extract","tag-raman","tag-wikimedia-commons"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/posts\/57948","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/comments?post=57948"}],"version-history":[{"count":0,"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/posts\/57948\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/media\/57956"}],"wp:attachment":[{"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/media?parent=57948"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/categories?post=57948"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/newsnarad.com\/hi\/wp-json\/wp\/v2\/tags?post=57948"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}