Impact of hydrogeochemical processes and its evolution in controlling groundwater chemistry along the east coast of Tamil Nadu and Puducherry, India

Author(s):  
Faizal Khan ◽  
Srinivasamoorthy Krishnaraj ◽  
Prakash Raja ◽  
Gopinath Selvaraj ◽  
Rabina Cheelil
2020 ◽  
Vol 100 (7) ◽  
pp. 1147-1153
Author(s):  
Subal Kumar Roul ◽  
N. S. Jeena ◽  
Shubhadeep Ghosh ◽  
Prathibha Rohit

AbstractCrenidens macracanthus was originally described in 1874 based on a single specimen collected from Chennai (Madras), south-east coast of India. In 1875, the species was synonymized with C. indicus without citing any valid reason. Since then, no taxonomic studies have been attempted for the genus Crenidens, except in 2013 the species was resurrected from synonymy and redescribed as a valid species based on the holotype and non-type specimen. In view of the fact that C. macracanthus is a poorly known species, it is redescribed based on examination of 30 additional specimens of 105.8–162.2 mm SL, collected from Puri, Odisha, north-east coast of India (Bay of Bengal) from 2017–2019, using morphological and molecular examinations. Our study provides a detailed morphological description, first colour photographs and phylogenetic analysis using COI barcodes of the species. The study has expanded the range in several morpho-meristic characters in comparison with the type and non-type specimens described earlier. The species in fresh condition can be easily distinguished from its two congeners (C. crenidens and C. indicus) by the yellowish tip of the lower caudal-fin lobe. Our study has also extended the distribution range of C. indicus (previously known only from the north-eastern Arabian Sea) to the eastern Indian Ocean, based on examination of a preserved specimen collected from Tuticorin, Tamil Nadu.


1971 ◽  
Vol 17 ◽  
pp. 564-592 ◽  

Chandrasekhara Venkata Raman was born at Trichinopoly in South India on the 7 November 1888. Raman’s parents, Chandrasekhara Iyer and Parvati Ammal, lived at that time in what was then called the province of Madras, a part of India now known as the Tamil Nadu. The family, for many generations, had been pursuing the profession of agriculture and were of moderate means. Family traditions in those days were such that if anyone attempted to break off from them, it would have been regarded as a bold step. Raman’s father did take such a bold step when for the first time in the family, he took to teaching in the local English High School. This bold step was followed by another when Mr Chandrasekhara Iyer decided to accept the post of lecturer in physics and mathematics at the Mrs A. V. N. College, Vizagapatam; Raman was then four years old. Vizagapatam, now known as Visakhapatnam, is a sea-port town on the east coast of India and situated in the State of Andhra Pradesh. Thus, the parents and with them the four-year-old son moved to Vizagapatam. The next ten years of Raman’s life were spent at Vizagapatam, where he studied for eight years in the High School and two years in the College. He passed the Intermediate examination in 1902, enabling himself to join for a university degree course. In January 1903, he moved to Madras and joined the Presidency College. He passed his B.A. degree examination in 1904, winning the first place and a Gold Medal in physics. He passed the M.A. degree examination in 1907, again obtaining a first division and record marks.


2017 ◽  
Vol 121 (1-2) ◽  
pp. 418-424 ◽  
Author(s):  
N. Harikrishnan ◽  
R. Ravisankar ◽  
A. Chandrasekaran ◽  
M. Suresh Gandhi ◽  
K.V. Kanagasabapathy ◽  
...  

2016 ◽  
Vol 11 (1) ◽  
pp. 190 ◽  
Author(s):  
Venugopal Gopikrishnan ◽  
Manikkam Radhakrishnan ◽  
Raasaiyah Pazhanimurugan ◽  
Thangavel Shanmugasundaram ◽  
Ramasamy Balagurunathan

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