Modest rise in bird diversity recorded in Kottayam town
Kottayam sees a slight increase in bird diversity. A survey in the Kottayam urban area on Saturday recorded 47 bird species, up from 40 species documented last year.
Among the new additions this year were the oriental honey buzzard and the plum-headed parakeet—birds that are rarely seen in urban environments. The number of bird nests at the nesting colony near Nagampadom Stadium also showed a notable rise compared to the previous year.
Around 600 nests were observed across nine trees, housing species such as the oriental darter, little cormorant and Indian cormorant. In contrast, fewer than 100 nests were recorded across just four trees last year. The resurgence of the nesting colony is credited to the increased community support from local traders and the general public.
Commonly sighted birds
The most commonly sighted birds in the city included the white-cheeked barbet, common myna, various species of crows, racket-tailed drongo, black drongo, and rock pigeon. Waterbirds like purple heron, oriental darter, and grey-headed swamphen were also recorded.
The survey team divided the city into five sectors, with the highest number of bird sightings reported on the CMS College campus, followed by Eerayil Kadavu. Other surveyed locations included the Nagampadom Stadium area, the Collectorate premises, and the PWD Rest House.
Organised by the Tropical Institute of Ecological Sciences (TIES), the survey saw the participation of around 40 volunteers, including bird watchers, experts, and junior naturalists. The initiative was led by Punnen Kurian Venkadath, secretary of TIES
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The Hindu
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The Svedberg show
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Stoked by the advent of new discoveries and inventions in both physics and chemistry, Svedberg went about building stuff on his own. He created a Marconi-transmitter and a Tesla-transformer this way and even arranged public demonstrations that included wireless telegraphy between two blocks of his school. Even though he had a passionate interest in botany, he decided to study chemistry following his hands-on efforts in his school laboratories. This experience also put him in good stead when he went on to experiment with colloids later on. A lifelong association After matriculating from school, Svedberg began a lifelong association with Uppsala University in January 1904. It was here that he received his Bachelor of Arts degree in 1905, his Master's degree in 1907 and Doctor of Philosophy in 1908. While still studying, Svedberg accepted a post as assistant in the Chemical Institute at Uppsala. This means that Svedberg's scientific career set off in 1905, while he was still in his early 20s. By 1907, he was given the added responsibility of serving as lecturer in chemistry in the university. It wasn't long before a special appointment as lecturer and demonstrator of physical chemistry came through in 1909. In 1912, he was elected Professor of Physical Chemistry, Uppsala University – a position he held onto until 1949, when he was made emeritus. It was in 1949 that Svedberg took on the role of director of the Gustaf Werner Institute for Nuclear Chemistry at the University. He remained at this post until 1967 and the institute was renamed The Svedberg Laboratory in 1986, about 15 years after his death in 1971. The facility was permanently shut down in 2016, following a decision a year earlier to implement decommissioning. It is worth mentioning that a Nature article in 1944 speaks of a volume 'compiled by colleagues, friends and pupils to celebrate the sixtieth birthday of The Svedberg.' Even though by title he was a Professor of Physical Chemistry, 31 of the 56 communications in that volume can be termed as biophysics – both a nod to Svedberg's passion towards biological systems, and the fact that he had wide-ranging interests and activities. British physical chemist Eric Keightley Rideal, to whom the Nature article is attributed, also makes it clear that if it hadn't been for the limitations imposed on this compilation by World War II, the 'contributions would certainly have come in from all parts of the world.' A lifetime with science Primarily interested in colloids, Svedberg's work mainly concerned with these particles with a size of between 1 and 100 nanometres. His 1908 doctoral thesis – Studien zur Lehre von den kolloiden Lösungen – is now considered a classic and he described a new method of producing colloidal particles. Svedberg also gave convincing evidence of the validity of the theory on Brownian movements founded by renowned theoretical physicist Albert Einstein and Polish physicist Marian Smoluchowski. In this way, Svedberg provided conclusive proof of the physical existence of molecules. One of Svedberg's early patents was filed on June 1, 1909. In this patent, titled 'Process of Producing Colloidal Sols or Gels.' Svedberg speaks of an invention relating to the process of producing colloidal sols or gels. The patent was accepted and granted in Great Britain on May 26, 1910. It is interesting to note that Svedberg applied for this patent in four countries. What's more, he made the applications in Denmark, Switzerland, and Austria also on June 1, 1909. Working with a number of collaborators, Svedberg continued to study the physical properties of colloids, be it diffusion, light absorption, or sedimentation. His studies enabled him to conclude that the gas laws could be applied to disperse systems. Svedberg invented the ultracentrifuge for the study of sedimentation. Using this, he could study large molecules in solution, such as proteins, carbohydrates, and high polymers. Svedberg employed centrifugal forces to better mimic the effects of gravity on particles and the first ultracentrifuge, which was constructed in 1924, could generate a centrifugal force up to 5,000 times the force of gravity. With an ultracentrifuge, Svedberg came up with findings relating to molecular size and shape, and also used it to prove that proteins were a kind of macromolecules, paving the way for molecular biology. For his discoveries regarding disperse systems, Svedberg was awarded the Nobel Prize in Chemistry 1926. In his later years, Svedberg switched to nuclear chemistry and radiation biology. He made contributions to improve the cyclotron and helped his doctoral student – Swedish biochemist Arne Tiselius – as he went about researching electrophoresis to separate and analyse proteins. Tiselius himself went on to win the Nobel Prize in Chemistry 1948 'for his research on electrophoresis and adsorption analysis, especially for his discoveries concerning the complex nature of the serum proteins.' An Indian connection Svedberg has a couple of Indian connections – one that can be refuted, and another based on solid fact. The picture shown here is from The Hindu's archives. This image's caption mention both Svedberg and Indian physicist C. V. Raman. While there's no doubt that Raman is the one seated second from left, the same cannot be said about Svedberg. Even though he could be the one standing behind Raman, it can't be proven beyond doubt. 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When the Academy began functioning with 65 Founding Fellows in 1934, it elected Raman as its president in its first general meeting. Considering that Svedberg was elected an honorary fellow the very next year, the two men might well have known each other.
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