Google Doodle honours SPL Sorensen who introduced pH scale
New Delhi, May 29 : Google on Tuesday celebrated Danish chemist Soren Peder Lauritz Sorensen who introduced the pH scale to the world with an interactive Doodle.
Sorensen's method of expressing acidity -- the negative logarithm of hydrogen ion concentration (pH) -- still has a wide range of real-world uses.
For example, in agriculture, the pH value can indicate the moisture associated with a soil, which can reveal what crops are suitable for the soil and what adjustments farmers must make to adapt it for growing any other crops.
Born in Havrebjerg in 1868, Sorensen was initially interested in studying medicine at University of Copenhagen. But he eventually spent more time studying chemistry and obtained his PhD in 1899.
Sorensen did most of his research in Carlsberg Laboratories. He became the director of its chemical section in 1901. While at Carlsberg, Sorensen started to study amino acids, proteins and enzymes.
As hydrogen ion concentration played a key role in enzymatic reactions he devised a simple way of expressing it, according to EuCheMS, the European Association for Chemical and Molecular Sciences.
He found that by taking a negative logarithm of hydrogen ion concentration a convenient scale can be established. This is the well-known pH value.
He also developed buffer solutions to maintain constant pH of solutions (Sorensen buffers), EuCheMS noted in a short biography of the scientist in its website.
The Google Doodle on Tuesday allows users to see for themselves the pH value of different food items, including tomatoes and eggs in a scale of 1 to 14.
Sorensen retired from his post at Carlsberg in 1938. He died in Copenhagen in 1939.
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BJP using women's quota bill as front to pass Delimitation Bill that will break India: Mamata
Cooch Behar (WB) (PTI): Chief Minister Mamata Banerjee on Friday alleged the BJP-led NDA government at the Centre was using the proposed amendment to the women's quota law in Parliament as a front for the Delimitation Bill that would "break the country into pieces".
The TMC will fight this Central government's move at every step, she asserted at her party's poll rally here.
The Constitution (131st Amendment) Bill to tweak the women's quota law, along with the Delimitation Bill and the Union Territories Laws (Amendment) Bill, to implement the proposed amended women's quota law, in the Union territories of Delhi, Puducherry and Jammu and Kashmir, were introduced in the Lok Sabha on Thursday.
According to the Constitution amendment bill, Lok Sabha seats will be increased to a maximum of 850 from the current 543 to "operationalise" the women's reservation law before the 2029 parliamentary polls, following a delimitation exercise based on the 2011 Census.
Seats will also be increased in state and Union territory assemblies to accommodate 33 per cent reservation for women.
Opposing the Centre's move, Banerjee alleged that "the BJP brought the Delimitation Bill while keeping the women's reservation bill at the front".
"The BJP is trying to increase the number of seats in the Lok Sabha to nearly 850 through the Delimitation Bill. It will break the country into pieces," the TMC supremo said.
She also alleged that Prime Minister Narendra Modi was not speaking the truth about the development of north Bengal at a BJP rally last week.
"The prime minister said nothing was done for the development of north Bengal. But we spent Rs 1.72 lakh crore on the development of the region," Banerjee said and asked Modi to cross-check data before making such remarks.
