An endangered species in the stomach

Article Abstract:

Helicobacter Pylori has long colonized human stomach causing higher risk of developing peptic ulcers and stomach cancer. This ulcer-causing bacterium is heading for extinction. Studies of the interactions between Helicobacter pylori and humans may lead to better treatments for disorders of the digestive tracts as well as a greater understanding of other bacteria that colonize the human body.

United States, Causes of, Risk factors, Helicobacter infections, Stomach cancer, Peptic ulcer

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Grand piano

Article Abstract:

The piano was invented by Bartolomeo Cristofori, a Florentine harpsichord maker in the 18th century. It was intended to improve the expressiveness of the harpsichord through the 'escape mechanism,' a device which is considered the heart of modern pianos. An illustration of the major parts of a grand piano is also presented.

Design and construction, Piano, Pianos

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The endangered piano technician

Article Abstract:

A concert pianist's greatest assets are his piano and piano technician. Aside from ensuring that all a piano's keys produces a rich and clear tone, technicians also provide pianists much-needed moral support.

Personal narratives, Pianists, Piano technicians

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