The afternoon nap which changed the world of chemistry
Updated / Friday, 5 Apr 2019
07:54
The periodic table: a landmark event that was to transform chemistry from a tangle of disorganised facts into a disciplined science . Photo: iStock
Analysis: It s 150 years since Dmitri Mendeleev came up with the Periodic Table of chemical elements and transformed chemistry
What s all the fuss about?
Dmitri Mendeleev s discovery in St Petersburg in 1869 was a landmark event that was to transform chemistry from a tangle of disorganised facts into a disciplined science. It was to formulate the thinking of generations of scientists to come and to be a feature of every future chemistry textbook from Junior Cycle to undergraduate. His table would arrange 63 elements, (an element is a substance that is made up of identical atoms), into a recognisable and repeating pattern that all the other 58+ elements, yet to be discovered, would follow.
Despite significant methodological and technological advancements in chemical recycling of synthetic polymers, an effective mechanochemical PET degradation has not yet been described in the scientific literature, until now! Vjekoslav Štrukil from the Rudjer Boskovic Institute (RBI), Zagreb, Croatia, found that the challenging breakdown of waste PET under ambient conditions of temperature and pressure can be achieved by mechanochemical ball milling or vapor-assisted aging.
25 June 2020 - Wits University
Professor Zeblon Vilakazi appointed as the Wits Vice-Chancellor and Principal from 1 January 2021
The Council of the University of the Witwatersrand today announced the appointment of Professor Zeblon Vilakazi as the Vice-Chancellor and Principal of the University from 1 January 2021. He takes the reins from Professor Adam Habib who leaves Wits at the end of the year to lead the School of Oriental and African Studies in London.
Professor Vilakazi is the current Vice-Principal and Deputy Vice-Chancellor for Research and Postgraduate Studies at Wits. Under his leadership, Wits’ research output has more than doubled, with the University increasingly producing more research with impact. He is widely published (325 papers) and highly cited with an h-index of 70.
Microplastics Permeate Human Placentas medscape.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from medscape.com Daily Mail and Mail on Sunday newspapers.
Saturday, December 19, 2020
On December 10, 2020, the U.S. Environmental Protection Agency (EPA) announced a new policy that will allow registrants of antimicrobial pesticide products voluntarily to disclose all inert ingredients more efficiently in response to the request of retailers, states, and industry.
Registrants who wish to disclose all inert ingredient can choose to do so in three ways under the new policy:
On the product label as part of the full ingredient statement or on the product’s back or side panel with a referral to the full ingredient statement;
On a website referenced on the product label; or
On a website that is not directly linked to the product label.