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112 articles for “mask”
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Passive Capillary Flow of Aqueous Microparticle Suspensions in the Sudden Expansion PMMA Microchannels
Abstract: AbstractAuthor has fabricated a set of sudden expansions micro channels in the polymethylmethacrylate (PMMA) microfluidic devices by the maskless lithography, hot embossing lithography, drilling, air dielectric barrier discharge (DBD) plasma processing, direct bonding technique and chip separation technique. The surface-driven capillary flow of dyed water and three individual aqueous microparticle suspensions are studied with respect to the effects of channel aspect ratio, effective viscosity and surface wettability. The number densities …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 1, 2017 · pp. 13–17 Read article
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Surface-Driven Capillary Flow of Aqueous Microparticle Suspensions as Working Liquids in the PMMA Microfluidic Devices
Abstract: AbstractPolymethylmethacrylate (PMMA) microfluidic devices have been fabricated by the maskless lithography, hot embossing lithography, drilling and direct bonding technique. The influence of effective viscosity on the speed of surface-driven capillary flow of aqueous microparticle suspensions has been studied. The surface-driven capillary flow of any particular aqueous microparticle suspension is faster in the microchannel of larger channel aspect ratio. Also, the surface-driven suspension flow is faster on the surface of higher …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 1, 2017 · pp. 18–21 Read article
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Experimental Investigations on the Effects of Channel Aspect Ratio and Surface Wettability to Control the Surface-Driven Capillary Flow of Water in Straight PMMA Microchannels
Abstract: AbstractTotal 214 individual straight polymethylmethacrylate (PMMA) microchannels have been fabricated by the maskless lithography, hot embossing lithography, direct bonding technique, and atmospheric pressure air dielectric barrier discharge (DBD) plasma processing. The experimental investigations on the effects of structural properties (channel aspect ratios) and physical properties (surface wettability, capillary pressure and kinetic energy) on the surface-driven capillary flow of dyed water in straight PMMA microchannels is a novel approach in this …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 3, 2016 · pp. 1–12 Read article
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Real-Life Demonstration on the Surface-Driven Capillary Flow in Microfluidic Devices
Abstract: AbstractIn this research paper, glass and PMMA are chosen as materials to fabricate the microfluidic devices due to the optical transparency of these materials. The microfluidic devices are fabricated by the maskless lithography (non-contact lithography), hot embossing lithography (contact lithography), indirect bonding technique, and direct bonding technique. The surface-driven capillary flow is recorded corresponding to each microfluidic device by a CMOS camera. The colour-images are compared with the gray-scale-images for …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 2, 2016 · pp. 8–17 Read article
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Effect of Surface Wettability on the Surface-Driven Capillary Flow in SU-8 Microchannels
Abstract: AbstractSU-8 microfluidic devices have been fabricated by the maskless lithography. Passive capillary flow is suitable to manipulate liquid in the lab-on-a-chip systems. The surface-driven capillary flow of dyed water in each microfluidic device has been recorded and analysed. The measured static water contact angles are 72.6°and 81.2° on the hydrogenated amorphous carbon (a-C:H) deposited flat surface and Si-a:C:H deposited flat surface respectively. Either, a-C:H or Si-a:C:H has been deposited on …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 2, 2016 · pp. 24–29 Read article
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Optical Recording of Flow Phenomena in Photoresist based Microfluidic Devices
Abstract: AbstractIn this experimental work, a set of three individual SU-8 based glass microfluidic devices are fabricated by maskless lithography and indirect bonding technique without having any microfluidic leakage. Dyed ethanol (10% ethanol, 90% red dye) is prepared and used as dyed working liquid. The microfluidic leakage is observed in other set of two leaky microfluidic devices due to improper indirect bonding technique. The effect of surface-to-volume ratio on surface-driven capillary …
Published in Trends in Opto-electro & Optical Communication · Vol. 10, Issue 1, 2020 · pp. 36–42 Read article
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Optical Recording of Surface-Driven Capillary Flow in Straight PMMA Microchannels
Abstract: AbstractIn this experimental work, a total of six individual straight microchannels are fabricated using maskless lithography, hot embossing lithography and direct bonding technique. Polymethylmethacrylate (PMMA) is the selected transparent polymer to fabricate these microchannels facilitating the optical recording of the surface-driven capillary flow of dyed water (working liquid) using a CMOS camera catching 25 frames per second with a corresponding time-scale resolution of 0.04 second. Dyed water as dyed working …
Published in Trends in Opto-electro & Optical Communication · Vol. 10, Issue 1, 2020 · pp. 24–30 Read article
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Short Report on Surface-driven Microfluidic Flow of Dyed Ethanol in Microchannel Bend Fabricated by Optically Transparent Polymer in Cleanroom Environment
Abstract: In this experimental work, a single microchannel bend is fabricated by maskless lithography, hot embossing lithography and direct bonding technique. Polymethylmethacrylate (PMMA) is the chosen optically transparent polymeric material to fabricate the microchannel bend inside the cleanroom laboratory. Dyed ethanol is prepared as working liquid. CMOS camera is used to record the surface-driven capillary flow of dyed ethanol in the fabricated microchannel bend. Effect of centrifugal force on surface-driven capillary …
Published in Trends in Opto-electro & Optical Communication · Vol. 10, Issue 3, 2020 · pp. 1–4 Read article
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Development of Covid-19 Vaccine: A Review
Abstract: The emergence in December 2019 of a novel coronavirus, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has had devastating consequences globally. This is the worst catastrophe suffered by mankind in recent history. In the face of this severe disaster, people all over the world are frightened of the prospect of facing an outbreak or an annual recurrence. Control measures such as the use of masks, physical distancing, testing of …
Published in Research and Reviews : A Journal of Immunology · Vol. 11, Issue 2, 2021 · pp. 12–22 Read article
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Herbal Immunity Boosters and Dietary Therapies in Covid-19 Prevention
Abstract: The pandemic of Coronavirus, also known as Covid-19 pandemic, is an ongoing global pandemic, caused by extreme coronavirus-2 (SARS-CoV-2). To avoid infection and toughen immunity, foods and herbs may be utilized as nutritional or on the other hand integral treatment to forestall contamination and toughen immunity, as antiviral agents for masks, as disinfectants to control airborne transmission, or as sanitizing agents to clean surfaces. Immunity is the big term right …
Published in Research and Reviews : A Journal of Medical Science and Technology · Vol. 9, Issue 3, 2020 · pp. 39–45 Read article
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COVID-19 as Major Pandemic Threat to 21st Century
Abstract: A newborn virus has been detected which can cause a very contagious disease known as coronavirus disease (COVID-19). The outbreak of COVID-19 pandemic has led to lockdown across the globe. India has become one of the leading exporters of coronavirus testing kits, masks, medicines and vaccines. Also, India has played an important role in the containment of COVID-19 disease. COVID-19 pandemic taught the importance of health, hygiene, healthy lifestyle and …
Published in Research and Reviews : A Journal of Medical Science and Technology · Vol. 10, Issue 2, 2021 · pp. 44–48 Read article
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Coronavirus – a Journey from Unknown to Known
Abstract: AbstractGlobally, a unique virus, novel coronavirus-19 affected the humanity in year of 2019. The virus resulted in a pandemic condition. The disease widespread affects the population of all age group. According to updated data, virus results in high mortality rate. Globally 4, 69,587 deaths and 8,993,659 confirmed cases were reported to WHO. The clinical manifestations includes respiratory symptoms and include fever, cough and shortness of breath. In criticalcondition, infection can …
Published in Research and Reviews: A Journal of Toxicology · Vol. 10, Issue 2, 2020 · pp. 32–39 Read article