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Ester bonds are easily biodegradable through spontaneous or endogenous, nonspecific esterase hydrolysis, which has been commonly used in medicinal chemistry to make ester prodrugs. The reason for the change to the quinolone substructure is unknown, but it may have been found to be a suitable replacement for the naphthoyl moiety that is ...
A manufacturing plant was set up on Hendee Street in Springfield, Massachusetts, at the former 'American Wire Wheel Company' building. Over the years, the factory's 1,200 employees produced 1,703 Silver Ghosts and 1,241 Phantoms, with the first Silver Ghost chassis finished in 1921. The 1929 stock market crash led to the plant's closure in 1931.
Roger Tory Peterson revolutionized the science of ornithology by devising a system of bird identification based on his observation that each bird displays a unique set of markings. This profile follows the artist-naturalist into the fields and marshes of North America and Antarctica as he leads tours and displays some of the photographic ...
The United States Food and Drug Administration (FDA or US FDA) is a federal agency of the Department of Health and Human Services.The FDA is responsible for protecting and promoting public health through the control and supervision of food safety, tobacco products, caffeine products, dietary supplements, prescription and over-the-counter pharmaceutical drugs (medications), vaccines ...
The study demonstrates a "nanowarming" technique for vitrification for up-to-100 days preservation of transplant organs. [239] [240] 22 June – A study projects that by 2050, the worldwide number of adults with diabetes will more than double, from 529 million to over 1.3 billion. No country is expected to see a decline.
NOVA explores the mysterious ecosystem of the desert: a snowstorm; a lashing summer monsoon; and the emergence—in a pool created only minutes before—of a pair of adult spadefoot toads. Toads who had been waiting beneath the sand for a year for this brief and fortuitous moment to procreate the next generation. Narrated by Robert Dryden.
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