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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Kangana Ranaut sparks row: Claims Gandhi made 'Raghupati Raghav Raja Ram' the national anthem
New Delhi: A significant political controversy has erupted following the Modi government's decision to rename the Mahatma Gandhi National Rural Employment Guarantee Act (MGNREGA), a move that has drawn sharp criticism from opposition parties. The row was further fueled by BJP MP Kangana Ranaut, who, while defending the name change, erroneously claimed that Mahatma Gandhi had made the devotional song "Raghupati Raghav Raja Ram" India’s national anthem.
The central government has rebranded the flagship rural employment scheme from MGNREGA to the "Viksit Bharat-Guarantee for Employment and Livelihood Mission," abbreviated as VB-G RAM G. The removal of Mahatma Gandhi's name from the scheme has been termed an insult to the Father of the Nation by the Congress and other opposition parties.
When questioned by the media outside Parliament regarding the opposition's allegations, Mandi MP Kangana Ranaut defended the government's decision by invoking Mahatma Gandhi's devotion to Lord Ram.
"How is naming it 'Ram Ji' an insult to Gandhi ji?" Ranaut asked. "Mahatma Gandhi made 'Raghupati Raghav Raja Ram' the national anthem to organize the entire country. Therefore, this is an insult to Mahatma Gandhi? The government is fulfilling his dream by giving it the name of Ram."
Ranaut's claim regarding the national anthem was immediately seized upon by the opposition. Congress leader Supriya Shrinate shared the video of Ranaut’s statement on social media, tweeting sarcastically, "Come on brother, today we learned a new national anthem! The BJP is full of such gems."
Social media users also trolled the MP for the factual error. One user quipped, "Kangana ji forgot to mention that Bapu made this the national anthem after the country got independence in 2014," while another commented that the party finds people who "don't use their brains while forwarding WhatsApp messages."
Beyond the social media mockery, senior Congress leaders criticised the renaming on ideological grounds. Former Rajasthan Chief Minister Ashok Gehlot took to X (formerly Twitter) to condemn the move.
"The biggest irony is that Mahatma Gandhi was a lifelong devotee of Lord Ram and said 'Hey Ram' in his last moments," Gehlot wrote. "Today, the central government is making a despicable attempt to sideline Gandhi ji under the guise of the same 'Ram' name (VB-G RAM G), which is highly condemnable."
मनरेगा का नाम बदलने की केंद्र सरकार की कवायद महात्मा गांधी के प्रति उनकी ओछी मानसिकता और असम्मान का प्रमाण है। सरकार पहले 'पूज्य बापू' के नाम का शिगूफा छोड़ती है और फजीहत होने पर अब 'विकसित भारत-गारंटी फॉर रोजगार एंड आजीविका मिशन (VB-G RAM G)' जैसा नाम थोपना चाहती है। बार-बार नाम…
— Ashok Gehlot (@ashokgehlot51) December 15, 2025
गांधी जी ने ‘रघुपति राघव राजा राम’ को लेकर नेशनल एंथम बनाया था
— Supriya Shrinate (@SupriyaShrinate) December 16, 2025
BJP MP कंगना रनौत
चलो भाई आज नया नेशनल एंथम भी पता चला है!
BJP में एक से एक शिरोमणि भरे पड़े हैं 😂🤣 pic.twitter.com/9DvyV5xLb1
