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Generally, ores of 5 parts per million (g/t) or greater grade will be extracted using underground mining and aim follow the gold bearing structure. [50] A gold mine can expect to extract ores of 1–2 parts per million (g/t) in an open pit mine due to the relatively lower operating costs of an open pit mine. [51]
The pylorus is considered as having two parts, the pyloric antrum (opening to the body of the stomach) and the pyloric canal (opening to the duodenum). The pyloric canal ends as the pyloric orifice, which marks the junction between the stomach and the duodenum. The orifice is surrounded by a sphincter, a band of muscle, called the pyloric ...
The expansion of gold mining in the Rand of South Africa began to slow down in the 1880s, as the new deposits being found tended to be pyritic ore. The gold was difficult to extract from such ores. A process known as chlorination was once used to treat pyritic gold ore. Typically, the ore was roasted and then treated with chlorine gas. The ...
The anterior gastric branches of anterior vagal trunk are branches of the anterior vagal trunk which supply the stomach. [1]One long branch of it runs from the lesser curvature or parallel to it in lesser omentum as far as the pyloric antrum to fan out into branches in a way like the digits of a crow's foot to supply the pyloric antrum and the anterior wall of pyloric canal.
Antrum follicularum, the cavity in the epithelium that envelops the oocyte; Mastoid antrum, a cavity between the middle ear and temporal bone in the skull; Stomach antrum, either Pyloric antrum, the lower portion of the stomach. This is what is usually referred to as "antrum" in stomach-related topics [citation needed]
Pyloric canal; Pyloric antrum; This is for the following reasons: I plan to significantly expand the article on pylorus in the future and feel that it would be better to have the canal and antrum covered in this section under a 'structure' subheading. This would allow comparison between blood supplies, venous drainage, lymphatic and nervous supply.
After removal of the distal portion (including the antrum and the pylorus) of the stomach, a clamp is fitted at right angles to the greater curvature. [9] The clamp is pushed far enough orally (towards the mouth) for the removal level to correspond in size to the duodenal lumen. [9]
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