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The United States, 1960–1979 The History Of Mdma As An ...
1960s, there was no difficulty in obtaining “unending quantities of it, as it was available as a research chemical from different supply houses” (Shulgin and Shulgin 1991, 717f). This ended in 1970, when MDA was scheduled under the CSA. Thereafter, recipes for MDA were dis-tributed in underground chemistry cookbooks. Read Online & Download »
Xenoprotein Engineering Via Synthetic Libraries - Pnas.org
We set out to render practical the screening of high-diversity synthetic libraries and to explore the use of synthetic protein libraries for engineering de novo binding activity into a mirror-image miniprotein molecule (MIM). This task was chosen to illustrate the utility of chemical synthesis for xenoprotein engi-. Read Online & Download »
Not To Be Republished - National Council Of Educational ...
the periodic trends in the physical and chemical properties of the elements. 3.1 WHY DO WE NEED TO CLASSIFY ELEMENTS ? We know by now that the elements ar e the basic units of all types of matter . In 1800, only 31 elements wer e known. By 1865, the number of identified elements had more than. Read Online & Download »