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Isopentane, also called methylbutane or 2-methylbutane, is a branched-chain saturated hydrocarbon (an alkane) with five carbon atoms, with formula C 5 H 12 or CH(CH 3) 2 (C 2 H 5). Isopentane is a volatile and flammable liquid.
This list of birds of Pennsylvania includes species documented in the U.S. state of Pennsylvania and accepted by the Pennsylvania Ornithological Records Committee (PORC). As of May 2021, there were 439 species on the official list. [ 1 ]
This page alphabetically lists some known plant species occurring in the US state of Pennsylvania. Currently about 2,100 native and 1,300 non-native plant species are known in Pennsylvania. [1] According Pennsylvania Department of Conservation and Natural Resources, the known species make up 37% of Pennsylvania's total wild plant flora.
The plants listed below were indeed collected by Lewis, but a number of them (at least those marked with *****, were previously collected and described or were not described from the Lewis collections and therefore are not considered to be the first for science. For an accurate list see [2] and [3]
Common names include birdeye speedwell, [2] common field-speedwell, [3] Persian speedwell, large field speedwell, bird's-eye, or winter speedwell. It is native to Eurasia and is widespread as an introduced species in the British Isles (where it was first recorded in 1825 [ 4 ] ), North America, eastern Asia , including Japan and China , and ...
Another study found that the perception threshold of 3-mercapto-3-methylbutan-1-ol is 1500 ng/L. [15] This study found that MMB had a "catty" odor, had an orthonasal odor threshold of 2 μg/L in water, and was found in concentrations from 150-1500 μg/kg in coffee. The synthesis of MMB in wine is brought on by the fermentation process.
PETA is pitching an edible alternative to Punxsutawney Phil predicting the weather this upcoming Groundhog Day: A cake that when cut is blue or pink.
Smilax rotundifolia, also known as roundleaf greenbrier [2] or common greenbrier, is a woody vine native to the southeastern and eastern United States and eastern Canada. [1] [3] [4] It is a common and conspicuous part of the natural forest ecosystems in much of its native range.