Industrial Development in South Kongu Region as shown by Stone Inscriptions in Tholkaapiyar's theory

Literature is the mirror of life. Grammatical literary theory is one among the various kind of theories. Tamil literary texts helps us to understand the history of Tamilnadu. Tamil literature follows the principles of Grammar. Tholkaapiyar has given themes in his text Tholkaapiyam. Overall there are eight themes. Literature is made up of these eight themes. Basically the history of the people is recorded in the temple inscriptions.  Medieval temples include themes such as deity, food, animals, trees, grass (bird), drum, lyre, message.  Medieval inscriptions also mention these themes. This article tries to explain about news and business in detail

Coordinative Self‐assembly of π‐Electron Magnetic Porphyrins

π-Electron magnetic compounds on surfaces have emerged as a powerful platform to interrogate spin interactions at the atomic scale, with great potential in spintronics and quantum technologies. A key challenge is organizing these compounds over large length scales, while elucidating their resulting magnetic properties. Herein, we offer a relevant contribution toward this objective, which consists of using on-surface synthesis coupled with coordination chemistry to promote the self-assembly of π-electron magnetic porphyrin species. A porphyrin precursor equipped with carbonitrile moieties in a trans arrangement was prepared by solution synthesis and deposited on Au(111)/mica. Depending on the specific growth protocol, surface-promoted reactions led to the transformation of the precursor intonon-magnetic Au-CN coordinated porphyrin monomers, covalent porphyrin dimers, and one-dimensional porphyrin polymers (based on porphyrin monomers or covalent porphyrin dimers), as revealed by scanning probe microscopy studies combined with theoretical calculations. Interestingly, the scanning tunneling microscopy tip could convert such closed-shell porphyrin units into open-shell species by the removal of some peripheral hydrogen atoms. The magnetic features (i.e., singlet or triplet ground state) of the porphyrin units comprising the polymers were investigated for polymers of different lengths. No magnetic exchange coupling between adjacent units was observed, suggesting protection of the magnetic entitiesThis project has received funding from MCIN/AEI/10.13039/501100011033 through grants PID2019-108532GB-I00, PID2022-136961NB-I00, PID2020-116490GB-I00, PID2023-151167NB-I00, and TED2021-131255B-C43. IMDEA Nanociencia is appreciative of support from the “Severo Ochoa” Programme for Centers of Excellence in R&D (CEX2020-001039-S). We acknowledge the support from the ‘(MAD2D-CM)-IMDEA-Nanociencia’ and ‘Materiales Disruptivos Bidimensionales (2D)” (MAD2D-CM) (UAM1)-MRR Materiales Avanzados’ projects funded by Comunidad de Madrid, by the Recovery, Transformation and Resilience Plan, and by NextGenerationEU from the European Union. T.T. also acknowledges the Alexander von Humboldt Foundation (Germany) for the A.v. Humboldt—J.C. Mutis Research Award 2023 (Ref [3].3-1231125—ESP-GSA supported by MEYS CR (LM2023051

Lanthanide metal–organic network featuring strong perpendicular magnetic anisotropy

The coordination of lanthanides atoms in two-dimensional surface-confined metal-organic networks is a promising path to achieve an ordered array of single atom magnets. These networks are highly versatile with plenty of combinations of molecular linkers and metallic atoms. Notably, with an appropriate choice of molecules and lanthanide atoms it should be feasible to tailor the orientation and intensity of the magnetic anisotropy. However, up to now only tilted and almost in-plane easy axis of magnetizations were reported in lanthanide-based architectures. Here we introduce an Er-directed two-dimensional metallosupramolecular network on Cu(111) featuring strong out-of-plane magnetic anisotropy. Our results will contribute to pave avenues for the use of lanthanides in potential applications in nanomagnetism and spintronics.This work received funding from the European Research Council (ERC, grant 766555), Marie Sklodowska-Curie Actions (MSCA, project 894924) under the European Union's Horizon 2020 Research and Innovation Programme, and the EMPIR Programme co-financed by the Participating States and the European and Union's Horizon 2020 Research and Innovation Programme (grant EMPIR 20FUN03 COMET). IMDEA Nanociencia acknowledges support from the “Severo Ochoa” Programme for Centres of Excellence in R&D (MINECO, Grant SEV-2016-0686). The ALBA synchrotron is acknowledged for providing beam time at BOREAS beamline (proposal number 2021025028).Electronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d2nr07189dPeer reviewe

Two-dimensional Co-directed metal-organic networks featuring strong antiferromagnetism and perpendicular anisotropy

Antiferromagnetic spintronics is a rapidly emerging field with the potential to revolutionize the way we store and process information. One of the key challenges in this field is the development of novel two-dimensional antiferromagnetic materials. In this paper, we report the first on-surface synthesis of a Co-directed metal-organic network in which the Co atoms are strongly antiferromagnetically coupled, while featuring a perpendicular magnetic anisotropy. This material is a promising candidate for future antiferromagnetic spintronic devices, as it combines the advantages of twodimensionality and metal-organic chemistry with strong antiferromagnetic order and perpendicular magnetic anisotropy.Peer reviewe

A role for calcium in gonadotrophin-releasing hormone (GnRH) stimulated secretion of chorionic gonadotrophin by first trimester human placental minces in vitro

In vitro studies using first-trimester human placental minces have shown that stimulation of human chorionic gonadotrophin (hCG) secretion by gonadotrophin-releasing hormone (GnRH) is dependent upon the presence of extracellular calcium. Addition of GnRH to first-trimester placental minces in vitro was found to stimulate 45Ca2+ uptake into placental minces, and the process was associated with an increase in immunoreactive hCG in the medium. Addition of GnRH to placental minces preloaded with 45Ca2+ stimulated the efflux of 45Ca2+ within one minute. The calmodulin inhibitors chlorpromazine andtrifluoperazine inhibited the basal uptake and efflux of 45Ca2+ suggesting the involvement of calmodulin in the mobilization of calcium in the placenta

Synthesis and Characterization of GO-ZnO Nanocomposite Material Exhibiting Photo Catalytic Degradation of Dye Waste Water

44-49Graphene oxide (GO) nanoparticles were synthesized by improved hummer’s method and doped with ZnO as nano composite. The fabricated material surfaces of the chemically exfoliated GO sheets which are covered via a large number of hydroxyl, carboxyl and epoxy groups were introduced due to oxidation procedures. The functional groups are act as anchor sites for the insitu formation of ZnO nanoparticles. The obtained nano particles and doped nano composites were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) and applied for photocatalytic studies. XRD studies indicate that the GO nano sheet has the same crystal structure found in the hexagonal form of ZnO. SEM analysis provides the external morphology and crystalline structure. FTIR spectrum indicates the structural changes in GO and GO-ZnO composites. The photo catalytic performance of GO:ZnO nanocomposites was performed under UV irradiation. The present synthesized GO-ZnO photo catalyst showed an improved photo sensitized electron injection, collector and transporter by optimizing the initial crystal violet dye concentration as well as photocatalyst dosage. The dye degradation efficiency was found to be high as 93%