New Hydrazide based Tricyclic Pentacoordinate Siliconium Ions –A Facile Route to the Synthesis of Spherical Shaped Sr5(PO4)2SiO4

Hydrazide based phosphine linkers were prepared by the condensation reaction of hydrazide of the type RC(O)NHNH₂ (R = t-BuPh) with dppe (1,2-bis (diphenylphosphino)ethane) to produce the corresponding product of the type RCONHN=PPh₂CH₂CH₂PPh₂ = NNHCOR ( 2 ). The silylation product RC (OSiMe₃) = N-N=PPh₂-CH₂CH₂PPh₂ = N-N=C (OSiMe₃)R ( 3 ) derived from 2 reacts with halosilanes to yield novel hypercoordinate silicon (IV) complexes ( 4–7 ). All the products are well characterized by the spectroscopic and analytical data. The DFT calculations indicate that both charge density and electronegativity of the atoms surrounding a magnetically active nucleus have an effect on the chemical shift values. An increase in the electronegativity of the substituted atoms is reflected by the natural hybrids, which causes deshielding of the magnetic Si and P nuclei from the external magnetic field to an increasing level. As a consequence of this, the ²⁹Si and ³¹P NMR chemical shifts increase for 4–7 thus augmenting the experimental interpretations. Since the phosphorus hydrazide based hypercoordinate Si (IV) complexes are the rich sources of P, and Si directly from a single molecule, the present work also demonstrates the preparation of spherically shaped strontium phosphosilicate (Sr₅(PO₄)₂SiO₄) by the sol–gel method.     

Expeditious microwave-assisted synthesis and bio-evaluation of novel bis (trifluoromethyl) phenyl-triazole-pyridine hybrid analogues by the click chemistry approach

Research on Chemical Intermediates - A series of novel 1,2,3-triazole-2,4-bis(trifluoromethyl) phenyl pyridine hybrids 7a–n were efficiently synthesized by the click chemistry approach. The...     

Nootkatone,a Dietary Fragrant Bioactive Compound,Attenuates Dyslipidemia and Intramyocardial Lipid Accumulation and Favorably Alters Lipid Metabolism in a Rat Model of Myocardial Injury: An In Vivo and In Vitro Study

In the present study, we assessed whether nootkatone (NKT), a sesquiterpene in edible plants, can provide protection against dyslipidemia, intramyocardial lipid accumulation, and altered lipid metabolism in a rat model of myocardial infarction (MI) induced by subcutaneous injections of isoproterenol (ISO, 85 mg/kg) on days 9 and 10. The rats were pre- and co-treated with NKT (10 mg/kg, p.o.) administered daily for 11 days. A significant reduction in the activities of myocardial creatine kinase and lactate dehydrogenase, as well as non-enzymatic antioxidants, and alterations in lipids and lipoproteins, along with a rise in plasma lipid peroxidation and intramyocardial lipid accumulation, were observed in ISO-treated rats. ISO administration induced alterations in the activities of enzymes/expressions that played a significant role in altering lipid metabolism. However, NKT treatment favorably modulated all biochemical and molecular parameters altered by ISO and showed protective effects against oxidative stress, dyslipidemia, and altered lipid metabolism, attributed to its free-radical-scavenging and antihyperlipidemic activities in rats with ISO-induced MI. Additionally, NKT decreased the accumulation of lipids in the myocardium as evidenced from Oil red O staining. Furthermore, the in vitro observations demonstrate the potent antioxidant property of NKT. The present study findings are suggestive of the protective effects of NKT on dyslipidemia and the underlying mechanisms. Based on our findings, it can be suggested that NKT or plants rich in NKT can be promising for use as a phytopharmaceutical or nutraceutical in protecting the heart and correcting lipid abnormalities and dyslipidemia, which are risk factors for ischemic heart diseases.     

Preparation of electro-reduced graphene oxide supported walnut shape nickel nanostructures,and their application to selective detection of dopamine

Microchimica Acta - A selective and sensitive method is reported for the detection of dopamine (DA) by using electro-reduced graphene oxide (er-GO) supported walnut shape nickel...     

Characterization of Translation Planes by Orbit Lengths

The Desarguesian, Hall, and Hering translation planes of order q² are characterized as exactly those translation planes of odd order with spreads in PG (3,q) that admit a linear collineation group with infinite orbits one of length q+1 and i of length (q-q) /i for i=1 or 2.     

Study of Anticancer Properties of Graphene Oxide–Metal Oxide Composite

Graphene and graphene oxide (GO) have garnered significant attention due to their exceptional properties. GO, enriched with various functional groups such as epoxy, hydroxyl, and carboxylic groups, has exhibited remarkable potential in biomedical applications. The combination of GO with metals has proven to be a promising platform for cellular imaging, with this study focusing on the preparation of diverse hybrids of GO with metal oxides (GO/MO) and their potential as anticancer agents. In this research, GO is functionalized with MOs like TiO₂, Fe₃O₄, and Cu₂O using specific chemical methods and investigated for the anticancer activity for the application as cancer therapeutic agent. The resulting GO/MO hybrids exhibits favorable thermal and mechanical properties. Moreover, their cytotoxicity against human lung cancer cells is assessed in vitro, revealing the promising anticancer activity of GO/MO hybrids. Notably, the GO/Cu₂O hybrid demonstrates particularly high cytotoxicity in human lung cancer cells.     

A validated quantification of gallic acid and ellagic acid in Triphala using a high-performance thin-layer chromatography method

JPC – Journal of Planar Chromatography – Modern TLC - A well-known Ayurvedic preparation, Triphala, consists of Amla (Emblica officinalis Gaertn.), Baheda (Terminalia bellirica Roxb.)...