WebUltraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays.UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun.It is also produced by electric arcs …

WebFluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation.It is a form of luminescence.In most cases, the emitted light has a longer wavelength, and therefore a lower photon energy, than the absorbed radiation.A perceptible example of fluorescence occurs when the absorbed radiation is in the …

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WebLa PCR cuantitativa (en inglés, quantitative polymerase chain reaction; qPCR o Q-PCR) o PCR en tiempo real (en inglés real time PCR) es una variante de la reacción en cadena de la polimerasa (PCR) utilizada para amplificar y simultáneamente cuantificar de forma absoluta el producto de la amplificación de ácido desoxirribonucleico (ADN). Para ello …

WebFluorescence in situ hybridization (FISH) is a molecular cytogenetic technique that uses fluorescent probes that bind to only particular parts of a nucleic acid sequence with a high degree of sequence complementarity.It was developed by biomedical researchers in the early 1980s to detect and localize the presence or absence of specific DNA sequences on …

WebLa fluorescencia es un tipo particular de luminiscencia, que caracteriza a las sustancias que son capaces de absorber energía en forma de radiaciones electromagnéticas y luego emitir parte de esa energía en forma de radiación electromagnética de longitud de onda diferente. [1] La energía total emitida en forma de luz es siempre menor a la energía total …

WebAug 10, 2012 · Question: MAY, 2012 Insulin was the first hormone to be synthesised using genetic engineering. a. Define the term genetic engineering. (2) The process by which pieces of DNA are transferred from one organism to another. 9. b. Genetic engineering uses recombinant DNA. What is recombinant DNA?

WebGemstones fluoresce, including gypsum, talc, jellyfish, chlorophyll extract, vitamins etc are the common examples of fluorescent. Mineralogy, gemology, medicine, chemical sensors (fluorescence spectroscopy), fluorescent labelling, dyes, biological detectors, cosmic-ray tracking, vacuum fluorescent screens, and cathode-ray tubes are only a few ...

WebThe secondary stain, which fluoresces red, can stain a cell only if the cytoplasmic membrane is considerably damaged. Thus, live cells fluoresce green because they only absorb the green stain, whereas dead cells appear red because the red stain displaces the green stain on their nucleic acids .

WebNov 07, 2022 · Hipparchus was a Greek astronomer and mathematician who lived between about 190 and 120 B.C. Indirect evidence suggests that he made the first star catalog that used two coordinates to uniquely ...