Sir Jagadish Chandra Bose Biography
Over 100 years after Jagadish Chandra Bose ( জগদীশ চন্দ্র বসু ) conducted the test that built up plants have life, a gathering of scientists in Calcutta came together this year to rehash it.
Supriyo Kumar Das, an associate educator of Geology at Presidency University, drove the activity. The others in the group were additionally from Presidency — Debashis Datta and Rabindranath Gayen, both colleague teachers of Physics, Snigddha Pal Chowdhury, a research associate in the Geology office, Abhijit Dey, an associate educator of Botany, and Saranya Naskar, a MSc understudy of Physics.
Bose, who had joined Presidency College in 1885 as an educator in the Physics office, had conducted the trial in a research facility on these very precincts. Regardless of the amount he is hailed today for his scientific virtuoso, in his time Bose's investigation had not been received well.
Everything started when Peter V. Minorsky, a botanist and teacher at Mercy College in the US, connected with Das not long ago. Minorsky needed to think about the groundwater composition in the College Street region, where Presidency University stands.
Says Das, "It is from him that I caught wind of the prejudices against Bose. In the course of our exchanges, I got intrigued and sincerely associated with Bose's work."
He had been viciously criticized by George James Peirce, teacher of Plant Physiology at Stanford University. Peirce wrote in the journal, Science, in 1927: "The issue with Bose… is that while his curiosity is directed to biological marvels, his psyche is deficiently furnished with the data and propensities necessary for accurate investigation, and his reflections are routed to philosophical issues."
In 1929, the Indian Review detailed that G.A. Perrson, who was from the US, was not able discover beat in plants. Furthermore, years after the fact, in the mid-1960s, in the Handbuch der Pflanzenphysiologie (Encyclopedia of Plant Physiology), it was stated, "Shockingly Bose's theoretical perspectives and his passionate style of revealing have produced what might be an excessive skepticism concerning the legitimacy of his perceptions."
This is the thing that Bose had watched. By concocting a wire electrode — an innovation three decades relatively revolutionary — he distinguished a throbbing layer of cells adjoining the vascular tissue in plants. In an email to The Telegraph, Minorsky says, "Over the most recent couple of years, plant scientists have come to recognize this layer is the site of proliferating influxes of calcium discharge that are engaged with communicating worry from local purposes of occurrence to the remainder of the plant. The discovery of this calcium wave is one of the all the more exciting discoveries of the 21st century, and Bose's 'plant heart' originates before this discovery by a century."
Bose has left notes galore about each aspect of his historic analysis. One of the solitary oversights is the sort of water utilized. Says Das, "Being a geochemist and scientist, I comprehend the composition of groundwater and the effect of chemical worry of sodium on plants. I additionally realize that the composition of water fluctuates from place to place." He includes, "It occurred to us that Bose's companions in the West probably won't have indistinguishable outcomes from him because of the water utilized."
In Bose's time, water was provided to the Presidency campus from Palta in the Barrackpore zone. Das focuses to a spot occupied by a lift on the ground floor of Baker Building that houses the Physics office and says, "This is the place the old pipeline ran." Currently, the municipality deals with the water supply. It comes from the Tala tank in north Calcutta.
At the point when Das and others rehashed the test, they decided to utilize water from each conceivable source Bose may have accessed. "He could have additionally utilized water from the Ganges or from the lake in College Square," says Das.
Datta clarifies, "We needed to check the potassium and sodium concentration. Electricity courses through water just when there are a few particles present in it. Potentially, the scientists from the West had not utilized ionized water."
The "repeaters" utilized for the test the plant Bose had utilized — the Desmodium motorium, locally known as bon charal. Minorsky clarifies, "The parallel flyers of Desmodium are remarkable in the plant realm for their pronounced and ridiculous oscillatory developments. In the event that conditions are ideal, one can watch these sidelong handouts move at a pace marginally more slow than the second hand of a watch."
According to Minorsky, Bose enjoyed certain tremendous favorable circumstances over his Western peers. To start with, Desmodium motorium is a local of Bengal, so he approached a plentiful stock of solid, flourishing specimens. In contrast, in the West its cultivation was restricted to glasshouses. Those days, glasshouses were frequently warmed by push carts of consuming coal. These discharged a gas called ethylene, which thusly affected many plant processes, including a decrease in by and large excitability. Second, he calls attention to Calcutta's temperatures and how they loan themselves to plant study. "Temperatures of 30-35° Celsius, which occur commonly, are ideal for examining plant developments and excitability. The temperatures at which scientists in the West examined plants would have been much lower," he says. At last, there was the salty water advantage.
Dey organized 21 Desmodium plants. Each was kept in a measuring utencil brimming with a distinct water test. From that point, they were altogether kept in a controlled air. Says Gayen, "We placed them in glass measuring utencils and left them in the lab, where every one of the lights would be kept on so every one of them were presented to a similar measure of light. The climate control system would be set at a particular temperature to control the dampness. We would connect the tests to two distinct pieces of the stem. The source meter was utilized to peruse the fluctuating sign."
The conceptualizing continued for quite a long time and the examination kept going a fortnight. Das says, "The fear of disappointment was there. Yet, the minute when we got the primary reaction was lovely. The level line that showed up on the screen framed a pinnacle and afterward fell distinctly to rise once more. In spite of the fact that our chart didn't have pinnacles and troughs as tall as Bose's, we unquestionably had got a diagram that generally replicated the ECG diagram of people."
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FORKONAS Meminta Agar Pemerintah Terbitkan 2 PP Dan Cabut Motorium Pemekaran
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Penulis : Redaksi
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