Biography
Jagdish Chandra Bose, Indian-Bengali physicist and biophysicist (Bikrampur, Munshiganj District, Bangladesh 30 November 1858 – Giridih, Jharkhand, India 23 November 1937)
ACHIEVEMENTS
Measured refractive index from a number of substances
Invented galen detector the first semiconductor and was the first to employ it as a detector of electric rays and radio waves (1904)
Demonstrated that electromagnetic waves weren’t obstructed by solid walls and it could be transmitted wireless (1895)
Demonstrated radiotransmission independently of Marconi (1895)
First to use semiconductor junction for detecting radio waves
Suggested the existence of Sun electromagnetical radiation (confirmed in 1944)
Discovered metal fatigue and retrieval
Showed that materials fatigue was due to molecular cyclic changes
Since 1915 concentrated in plant physiological studies
Invented crescograph in order to study plants physical motion and growth rate
Invented transpirograph and photossinthetic recorder
Demonstrated plants minute movements under external stimulation
Demonstrated electric nature conduction occurring due many stimuli in plants
Showed that plant tissues produce electrical response similar that animal under distinct kinds of stimulation
Claimed have observed neural microscopic threads in vascular bundles that demonstrated activity when adjacent parts were stimulated
Proposed the theory that electromechanical pulsations of living cells were responsible for sap ascension in plants (1927). These cells would be like cardiac pulsating cells lying on cortical tissue in crescent layers. This theory is alternative to Dixon-Joly hypothesis.
First to study the action of microwaves in plant tissues and correspondent changes in cellular membrane potencial
ENUNCIATED LAWS IN PLANT PHYSIOLOGY
General Law of responsive motion “the mechanical response occurs on concavity of most excited side of plant”
Laws of polar excitation in plants
Growth Laws
Laws about curvature of responsive growth
Electric response laws
Law of polar effects under high electromotive forces
Torsional response laws
INVENTIONS
Mercury coherer with a phone (1899)
Many microwaves components (1890s)
Ressonance Recorder
Conductivity Balance
Magnetic Radiometer
A new electric polariscope (1895)
Bubbler
A producing apparatus of very short waves electric radiations
Waveguides
Horn antennas
Polarizers
Dielectric lenses
Prisms
Electromagnetic radiation detectors
Oscillating recorder
Diametric contraction apparatus
Kunchangraph, a device analogous to miograph
Recording microscope for record the growth of roots
Morograph
Recording optical lever
Electro thermal recorder
Shosungraph
HONORS
Bosea Das et al. 1996 (Bacteria)