What is NMRA standard s?

Published by %s
2019-11-29

What is NMRA standard s?

Standard (S) – NMRA Standards are to establish the broadest correlated set of limiting dimensions, electrical parameters and communications parameters within which interchange may be assured. Standards are reviewed by the membership and approved by the Board of Directors.

When is the next NMRA National Convention?

Your cart is empty. The Next National Convention: Gateway 2022 in St. Louis, MO The 2022 NMRA annual convention is August 7-13. The National Model Railroad Association, Inc. advances the global scale model railroading community through education, advocacy, standards, and social interaction.

How is The resorcinarene macrocycle prepared?

The resorcinarene macrocycle is typically prepared by condensation of resorcinol and an aldehyde in concentrated acid solution. Recrystallization typically gives the desired isomer in quite pure form. However, for certain aldehydes, the reaction conditions lead to significant by-products.

What is resorcinarene made of?

A resorcinarene (also resorcarene or calix[4]resorcinarene) is a macrocycle, or a cyclic oligomer, based on the condensation of resorcinol (1,3-dihydroxybenzene) and an aldehyde.