Sea Valve
A Kingston valve is a type of valve fitted in the bottom of a ship's plating that connects the sea to the ship's piping and storage tanks. A Kingston valve is a type of seacock. It is arranged so that, under normal operating conditions, sea pressure keeps the valve closed. When opened from the ship's interior, the Kingston valve allows sea water to enter the tank. The mechanism was introduced in 1837 by John Kingston (1786–1847), an English engineer after whom it is named. Surface ships On surface ships, Kingston valves are fitted on ship systems such as fuel tanks, water tanks, and ballast tanks. The valve allows sea water to enter the tank. For fuel tanks, the purpose was cleaning the tanks. On water tanks, the Kingston valve gave ship engineers the ability to blow out increasingly salty water from the system, by safely and easily operating the valve from the interior of the ship. Sea water was used in the ship's steam-powered propulsion system, with water being injected ...
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Argonaute FS S636 P1040826
The Argonaute protein family, first discovered for its evolutionarily conserved stem cell function, plays a central role in RNA silencing processes as essential components of the RNA-induced silencing complex (RISC). RISC is responsible for the gene silencing phenomenon known as RNA interference (RNAi). Argonaute proteins bind different classes of small non-coding RNAs, including microRNAs (miRNAs), small interfering RNAs (siRNAs) and Piwi-interacting RNAs (piRNAs). Small RNAs guide Argonaute proteins to their specific targets through sequence complementarity (base pairing), which then leads to mRNA cleavage, translation inhibition, and/or the initiation of mRNA decay. The name of this protein family is derived from a mutant phenotype resulting from mutation of AGO1 in '' Arabidopsis thaliana'', which was likened by Bohmert et al. to the appearance of the pelagic octopus '' Argonauta argo''. RNA interference RNA interference (RNAi) is a biological process in which the RNA ...
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