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17 hours ago · For example, books on the Atlanta University Center’s history are secondary sources because the author analyzes, interprets, retells, or explains events for which they were not present and did not personally witness. Secondary sources help you understand a topic and give you different views of historical people, events, and occurrences.
17 hours ago · This section relies excessively on references to primary sources. Please improve this section by adding secondary or tertiary sources . Find sources: "Electroencephalography" – news · newspapers · books · scholar · JSTOR ( May 2012 ) ( Learn how and when to remove this message )
17 hours ago · Radiation case (confines thermal X-rays by reflection) A thermonuclear weapon, fusion weapon or hydrogen bomb ( H bomb) is a second-generation nuclear weapon design. Its greater sophistication affords it vastly greater destructive power than first-generation nuclear bombs, a more compact size, a lower mass, or a combination of these benefits.
17 hours ago · DNA sequencing is the process of determining the nucleic acid sequence – the order of nucleotides in DNA. It includes any method or technology that is used to determine the order of the four bases: adenine, guanine, cytosine, and thymine. The advent of rapid DNA sequencing methods has greatly accelerated biological and medical research and ...
17 hours ago · Colombia. The most used grading systems are the numerical from 0 to 5 or from 0 to 10 and commonly are approved with 3 or 6, respectively. The letter system consists of E, S, B, A, I and is approved with A. The letter system is based on the numerical, meaning that the numerical system guides the letter one.
17 hours ago · Education is divided into a five-tier system which includes primary education, followed by secondary education, and tertiary education, depending on the level of technical training. Education is instructed in Spanish, though a bilingual education in Amerindian languages is available in regions with predominantly indigenous populations. [243]
17 hours ago · Primary, and secondary alcohols, are oxidized to aldehydes, and ketones, respectively, while tertiary alcohols are generally resistant to oxidation. Ethanol is a primary alcohol that has unpleasant actions in the body, many of which are mediated by its toxic metabolite acetaldehyde . [15]
