Central University of Kerala

About: Central University of Kerala is a education organization based out in Kāsaragod, India. It is known for research contribution in the topics: Population & Catalysis. The organization has 556 authors who have published 881 publications receiving 7474 citations.

CO2 absorption and sequestration as various polymorphs of CaCO3 using sterically hindered amine.

Abstract: One aspect of the attempt to restrain global warming is the reduction of the levels of atmospheric CO2 produced by fossil fuel power systems This study attempted to develop a method that reduces CO2 emissions by investigating the absorption of CO2 into sterically hindered amine 2-amino-2-methyl-1-propanol (AMP), the acceleration of the absorption rate by using the enzyme carbonic anhydrase (CA), and the conversion of the absorption product to stable carbonates CO2 absorbed by AMP is converted via a zwitterion mechanism to bicarbonate species; the presence of these anions was confirmed with 1H and 13C NMR spectral analysis The catalytic efficiency (kcat/Km), CO2 absorption capacities, and enthalpy changes (ΔHabs) of aqueous AMP in the presence or absence of CA were found to be 261 × 106 or 135 × 102 M–1 s–1, 097 or 096 mol/mol, and −69 or −67 kJ/mol, respectively The carbonation of AMP-absorbed CO2 was performed by using various Ca2+ sources, viz, CaCl2 (CAC), Ca(OOCCH3)2 (CAA), and Ca(OOCCH2CH3)2

MoS2 Confined MXene Heterostructures as Electrode Material for Energy Storage Application

Abstract: Two-dimensional (2D) titanium carbide Ti3C2 (MXene) is exemplified as the promising electrode material for supercapacitors. MXene was derived by etching of Al-layer from MAX phase (Ti3AlC2), and MoS2 was confined on MXenes through incipient wet impregnation of MoS2 precursor. The prepared MXene and MoS2/MXene materials were characterized by X-ray diffraction, scanning electron microscope and energy-dispersive X-ray spectroscopy, BET analysis, and X-ray photoelectron spectroscopy. The electrochemical characteristics of MXene and MoS2/MXene heterostructures were evaluated by different techniques such as cyclic voltammogram, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The electrochemical measurements revealed that the maximum specific capacitance of the MoS2/Mxene electrodes reaches up to 342 F g−1 at a discharge current density of 0.4 A g−1 in an enlarged voltage window of -1.5 V to 1.5 V. Also, Electrochemical impedance studies show that the incorporation of MoS2 decreases the charge transfer resistance of MoS2/MXene. Overall, the electrochemical performance of MoS2/MXene exhibited excellent reversibility, cycle stability, and rate performance. The obtained results uncover MoS2/MXene as promising electrode materials for supercapacitors.

Carbon Quantum Dot-Modified Carbon Paste Electrode-Based Sensor for Selective and Sensitive Determination of Adrenaline.

Abstract: A carbon quantum dot-based carbon paste electrode was fabricated and used for the determination of adrenaline (AD) at the nanomolar level. This fabricated electrode exhibited tremendous electrocatalytic activity for the oxidation of adrenaline in supporting electrolyte (PBS of pH 7.4). Scan rate variation studies with the modified electrode revealed that the overall electrode process was controlled by a diffusion process. A lower detection limit of 6 nM was achieved by chronoamperometry. Interference by biological molecules such as serotonin (5-HT) and ascorbic acid (AA) in the electrochemical oxidation of AD on the fabricated electrode was tested. It was observed that with the modified electrode, the selective determination of AD was possible. Further, with the fabricated electrode, simultaneous analysis of AA, AD, and 5-HT was performed, and it was observed that the overlapped peaks of these analytes on the naked electrode were well resolved into three peaks on the modified electrode. Along with decent ...

Genome and time-of-day transcriptome of Wolffia australiana link morphological minimization with gene loss and less growth control.

Abstract: Rootless plants in the genus Wolffia are some of the fastest growing known plants on Earth. Wolffia have a reduced body plan, primarily multiplying through a budding type of asexual reproduction. Here, we generated draft reference genomes for Wolffia australiana (Benth.) Hartog & Plas, which has the smallest genome size in the genus at 357 Mb and has a reduced set of predicted protein-coding genes at about 15,000. Comparison between multiple high-quality draft genome sequences from W. australiana clones confirmed loss of several hundred genes that are highly conserved among flowering plants, including genes involved in root developmental and light signaling pathways. Wolffia has also lost most of the conserved nucleotide-binding leucine-rich repeat (NLR) genes that are known to be involved in innate immunity, as well as those involved in terpene biosynthesis, while having a significant overrepresentation of genes in the sphingolipid pathways that may signify an alternative defense system. Diurnal expression analysis revealed that only 13% of Wolffia genes are expressed in a time-of-day (TOD) fashion, which is less than the typical ∼40% found in several model plants under the same condition. In contrast to the model plants Arabidopsis and rice, many of the pathways associated with multicellular and developmental processes are not under TOD control in W. australiana, where genes that cycle the conditions tested predominantly have carbon processing and chloroplast-related functions. The Wolffia genome and TOD expression data set thus provide insight into the interplay between a streamlined plant body plan and optimized growth.