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Institution

University of Madras

EducationChennai, Tamil Nadu, India
About: University of Madras is a education organization based out in Chennai, Tamil Nadu, India. It is known for research contribution in the topics: Ring (chemistry) & Lipid peroxidation. The organization has 8496 authors who have published 11369 publications receiving 211152 citations. The organization is also known as: Madras University & University of Chennai.


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Journal ArticleDOI
TL;DR: Comparative studies with other coastal regions indicate considerable enrichment of DTMs & TTMs in sediments as well as in various organs of fish samples, which indicates that metals are absorbed onto the different organs, which is endorsed by the calculated values of bioaccumulation factor (BAFs) in fishes.

107 citations

Journal ArticleDOI
TL;DR: The post-translational processing of Vg in M. rosenbergii is demonstrated for the first time that Vg processing has been clearly demonstrated in a crustacean species.
Abstract: A cDNA encoding vitellogenin (Vg) in the giant freshwater prawn, Macrobrachium rosenbergii, was cloned based on the cDNA sequence of vitellin (Vn) fragments A-N and B-42 determined previously, and its amino acid sequence deduced. The open reading frame (ORF) encoded 2,537 amino acid residues and its deduced amino acid sequence possessed three consensus cleavage sites, R-X-R-R, similar to those reported in Vgs of insects. The deduced primary structure of Vg in M. rosenbergii was seen to be similar to that of Penaeus japonicus, especially in the N-terminal region. It is therefore likely that Vgs in crustacean species including prawns and other related decapods exhibit a similar structural pattern. Based on the deduced primary structure of Vg and analysis of the various Vg and Vn subunits found in the hemolymph and ovary during ovarian maturation, we demonstrated the post-translational processing of Vg in M. rosenbergii. This is the first time that Vg processing has been clearly demonstrated in a crustacean species. Vg, after being synthesized in the hepatopancreas, is considered to be cleaved by a subtilisin-like endoprotease to form two subunits, A and proB, which are then released into the hemolymph. In the hemolymph, proB is possibly cleaved by a processing enzyme of unknown identity to give rise to subunits B and C/D. The three processed subunits A, B, and C/D are sequestered by the ovary to give rise to three yolk proteins, Macr-VnA, VnB, and VnC/D.

106 citations

Journal ArticleDOI
TL;DR: In this article, the formation of electroless Ni-B coatings obtained using a low temperature bath and evaluation of their characteristic properties are addressed in the form of X-ray diffraction (XRD), differential scanning calorimetry (DSC) and vibrating sample magnetometer (VSM), respectively.
Abstract: The formation of electroless Ni–B coatings obtained using a low temperature bath and evaluation of their characteristic properties are addressed in this paper. An alkaline bath having nickel chloride as the source of nickel and borohydride as the reducing agent was used to prepare the electroless Ni–B coatings. The influence of concentration of sodium borohydride in bath on the plating rate and the nickel/boron content of the resultant Ni–B coatings was studied. Selected coatings were characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and vibrating sample magnetometer (VSM), respectively, for assessing the phase content, phase transformation behaviour and magnetic properties. XRD patterns reveal that the structure of electroless Ni–B coatings in as-plated condition is a function of the boron content of the coating: higher the boron content, greater the amorphous nature of the coating and vice-versa. DSC traces exhibit two exothermic peaks around 300 and 420 °C, corresponding to the phase transformation of crystalline nickel and Ni3B phases at 300 °C and the transformation of a higher phase compound to Ni3B at 420 °C. VSM studies indicate that the magnetic properties of the coating is also a function of the boron content of the coating: higher the boron content, lesser the saturation magnetization.

106 citations

Journal ArticleDOI
TL;DR: A sugar-based photoresponsive supergelator, N-glycosylazobenzene that shows selective gelation of aromatic solvents is described, allowing photoinduced chopping of the entangled gel fibers to short fibers, resulting in controlled fiber length and gel-sol transition.

106 citations

Journal ArticleDOI
TL;DR: In this paper, nanocrystalline tin oxide (SnO 2 ) materials are synthesized by a chemical precipitation method and the electrical properties of the consolidated nano-structured SnO 2 are studied using an impedance spectroscopic technique.

106 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202315
202283
2021644
2020564
2019457
2018435