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Health effects of sunlight exposure. Exposing skin to the ultraviolet radiation in sunlight has both positive and negative health effects. On the positive side, exposure allows for the synthesis of vitamin D 3. Vitamin D has been suggested as having a wide range of positive health effects, which include strengthening bones [ 1] and possibly ...
August 29, 2018. ( 2018-08-29) –. present. You Quiz on the Block ( Korean : 유 퀴즈 온 더 블럭) is a South Korean variety show program on tvN starring Yoo Jae-suk and Jo Se-ho. [ 1] The first 12 episodes aired on tvN from August 29 and ended on November 14, 2018. It is broadcast by tvN on Wednesdays at 23:00 ( KST ).
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The idea of a link between parasite infection and immune disorders was first suggested in 1968 [13] before the advent of large scale DNA sequencing techniques.The original formulation of the hygiene hypothesis dates from 1989, when David Strachan proposed that lower incidence of infection in early childhood could be an explanation for the rise in allergic diseases such as asthma and hay fever ...
Photo 51 is an X-ray based fiber diffraction image of a paracrystalline gel composed of DNA fiber [1] taken by Raymond Gosling, [2] [3] a postgraduate student working under the supervision of Maurice Wilkins and Rosalind Franklin at King's College London, while working in Sir John Randall's group.
Lead poisoning, also known as plumbism and saturnism, is a type of metal poisoning caused by lead in the body. [ 2] Symptoms may include abdominal pain, constipation, headaches, irritability, memory problems, infertility, and tingling in the hands and feet. [ 1] It causes almost 10% of intellectual disability of otherwise unknown cause and can ...
Ionizing radiation (US, ionising radiation in the UK), including nuclear radiation, consists of subatomic particles or electromagnetic waves that have sufficient energy to ionize atoms or molecules by detaching electrons from them. [ 1] Some particles can travel up to 99% of the speed of light, and the electromagnetic waves are on the high ...
L-arabinose operon. The L-arabinose operon, also called the ara or araBAD operon, is an operon required for the breakdown of the five-carbon sugar L-arabinose in Escherichia coli. [ 1] The L-arabinose operon contains three structural genes: araB, araA, araD (collectively known as araBAD ), which encode for three metabolic enzymes that are ...