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Methylxanthines are chemical compounds which are derivatives of xanthine with one or more methyl groups, including: One methyl group: 1-Methylxanthine;
A mouse study on the potentiating effects of methylxanthines coadministered with mitomycin C on teratogenicity reported the incidence of birth defects for caffeine, theophylline, and paraxanthine to be 94.2%, 80.0%, and 16.9%, respectively; additionally, average birth weight decreased significantly in mice exposed to caffeine or theophylline ...
Xanthine (/ ˈ z æ n θ iː n / or / ˈ z æ n θ aɪ n /, from Ancient Greek ξανθός xanthós ' yellow ' for its yellowish-white appearance; archaically xanthic acid; systematic name 3,7-dihydropurine-2,6-dione) is a purine base found in most human body tissues and fluids, as well as in other organisms. [2]
7-Methylxanthine (7-MX), also known as heteroxanthine, is an active metabolite of caffeine (1,3,7-trimethylxanthine) and theobromine (3,7-dimethylxanthine). [ 1 ] [ 2 ] It is a non-selective antagonist of the adenosine receptors .
This is a complete list of cities and municipalities in the Philippines. The Philippines is administratively divided into 82 provinces ( Filipino : lalawigan ). These, together with the National Capital Region , are further subdivided into cities (Filipino: lungsod ) and municipalities (Filipino: bayan ).
The Philippines has three metropolitan areas officially recognized by the National Economic and Development Authority (NEDA) due to their prominence, population, size, and economy: Manila, Cebu, and Davao. [1] [2] The most populous is Metro Manila, which comprises the City of Manila, 15 neighboring cities, and a municipality.
Protected areas in the Philippines encompasses 4,620,000 hectares (11,400,000 acres) of terrestrial areas and 3,140,000 hectares (7,800,000 acres) of marine areas. [1] They are managed according to the following classifications described in Section 4 of the National Integrated Protected Areas System Act of 1992 (NIPAS Act).
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) currently lists 355 volcanoes in the Philippines as inactive. [2] The PHIVOLCS listing is the basis of this list, but with additional information, some were reclassified in the active list or the potentially active list.