Krishna University

A new series of amide derivatives of oxazol-2-yl)pyrazin-2-yl)-5-(pyridin-4-yl)-1,3,4-oxadiazole derivatives were designed, synthesized and evaluated in-vitro anticancer activities against breast cancer (MCF-7), lung cancer (A549), colon cancer (Colo-205) and ovarian cancer (A2780) by using of MTT assay, and the etoposide used as reference drug. The IC50 values ranges of compound from 0.23 ± 0.045 µM to 7.38 ± 5.62 µM, where etoposide showed values ranges from 0.17 ± 0.034 µM to 3.34 ± 0.152 µM. Most of the tested derivatives were showed good to moderate activities than etoposide. This study investigates the multitarget anticancer potential of compounds 21a–21d through molecular docking and ADME–Tox analysis. The compounds demonstrated strong binding affinities and critical interactions with EGFR and VEGFR2, indicating their potential to modulate key cancer-associated pathways, including proliferation and angiogenesis. ADME–Tox predictions revealed good solubility but identified limitations such as low intestinal absorption, P-gp–mediated efflux, and inhibition of multiple CYP450 isoforms, highlighting the need for further structural optimization. Overall, these findings provide mechanistic insights supporting the potential of this scaffold in multitarget-oriented anticancer drug discovery.

A novel series of aryloxazole–1,3,5-triazin-2-yl furo[2,3-d]pyrimidine derivatives (24a–j) was synthesized and structurally characterized using appropriate analytical techniques. All compounds were evaluated for their in vitro anticancer activity against a panel of human cancer cell lines, including prostate (PC3), lung (A549), breast (MCF-7), and ovarian (A2780) cancers, using the MTT assay. The clinically established chemotherapeutic agent etoposide was employed as a positive control. Most derivatives exhibited moderate to strong cytotoxic activity compared with the reference drug. Notably, compounds 24a–24e demonstrated superior potency relative to etoposide. Among them, compound 24a, bearing a 3,4,5-trimethoxy substitution on the aryl moiety linked to the oxazole core, showed remarkable antiproliferative activity against PC3, A549, MCF-7, and A2780 cell lines, with IC₅₀ values of 1.12 ± 0.75 µM, 0.18 ± 0.046 µM, 0.23 ± 0.066 µM, and 1.09 ± 0.73 µM, respectively. Docking simulations highlighted compounds 24a and 24b as the most favorable candidates, showing strong predicted binding interactions and stable orientations within the active sites of EGFR and Aurora kinase A, with slightly stronger affinity toward Aurora kinase A. ADMET profiling indicated that most derivatives exhibit acceptable drug-like properties, including general compliance with Lipinski’s criteria and predicted good gastrointestinal absorption, with the exception of 24a. All compounds were predicted to be P-glycoprotein substrates and potential hERG II inhibitors, suggesting possible concerns related to efflux liability and cardiotoxic risk. Collectively, these results support the promise of this scaffold while emphasizing the need for further structural refinement and experimental validation to improve pharmacokinetic and safety profiles before advancing to preclinical evaluation. The compound 24a with 3,4,5-trimethoxy group bearing on the aryl moiety attached to oxazole core unit showed good activity against PC3, A549, MCF7 and A2780 cell lines with IC50 values of 1.12±0.75 μM; 0.18±0.046 μM;0.23±0.066 μM and 1.09±0.73 μM.

Here, we are reporting the comparative results of PrFeO3 (PFO) nanomaterials obtained from the sol-gel method by using Polyvinylpyrrolidone (PVP) as a surfactant (sample name abbreviated as PFO-PVP) and without surfactant (sample name abbreviated as PFO). The use of PVP as a polymeric surfactant is vital in boosting both magnetic functionality and photocatalytic efficiency. X-ray diffraction (XRD) confirmed the single-phase orthorhombic crystal structure of PFO nanomaterials, while Raman spectra verified Fe-O-Fe and Pr-O-Fe lattice vibrations in both samples. Scanning electron microscopy (SEM) showed that PFO samples were highly agglomerated with irregular grains, whereas PFO-PVP displayed sheet-like morphology with reduced agglomeration. PFO-PVP nanomaterials exhibited similar to 4 times larger surface area than that of PFO nanomaterials, which is essential in photocatalysis applications. Correspondingly, PFO-PVP achieved nearly similar to 2 times higher saturation magnetization (Ms) value and photocatalytic rate constant compared to PFO, underscoring the role of morphology in enhancing functional properties. These findings collectively highlight the strong correlation between material processing, morphological control, and the resulting improvements in the structural, magnetic, and photocatalytic properties of PFO nanomaterials. High magnetization values, higher surface area, and high rate constant of PFO-PVP nanomaterial could be a potential candidate for wastewater treatment and other related applications.

Three modifier oxides, MgO, ZnO, and CdO, were mixed with 1.0 mol % of Thulium-doped lead arsenate glasses and were synthesized by the usage of melt-quenching technique. XRD patterns clearly show the evidence that samples are amorphous and had been supported with the aid of using the lack of distinct peaks. Various functional physical parameters such as molar volume, oxygen packing density (OPD), Tm3+ ion concentration, mean Tm3+ ion separation, polaron radius are evaluated by using experimentally measured densities and refractive indices. The optical absorption spectra of PbO-MO (M = Mg, Zn, Cd)-As2O3:Tm2O3 glass system have been studied. Through the application of least square fitting analysis, the J-O phenomenological parameters (02, 04, 06) for the three glass systems have been calculated.

Lead-free ferroelectric ceramics based on sodium bismuth titanate (Na0.5Bi0.5TiO3, NBT) are promising candidates for environmentally benign multifunctional devices; however, their practical application is limited by high coercive fields and restricted electromechanical response. In this study, 0.94Na0.5Bi0.5-x-yErxYbyTiO3–0.06BaTiO3 (NBEY-BT) ceramics with (x = y = 0.0 0.1) were synthesized via a conventional solid-state route to investigate the effect of Er3+/Yb3+ co-doping on the structural, microstructural, ferroelectric, and optical properties. X-ray diffraction combined with Rietveld refinement confirms a single-phase perovskite structure with coexisting rhombohedral (R3c) and tetragonal (P4mm) phases, characteristic of morphotropic phase boundary behavior. Er3+/Yb3+ co-substitution increases the tetragonal phase fraction and induces local lattice strain without forming secondary phases. Microstructural analysis reveals dense ceramics with uniform grain distribution and a reduced average grain size upon rare-earth doping. Ferroelectric measurements show well-saturated polarization–electric field hysteresis loops, with the co-doped composition exhibiting a reduced coercive field and enhanced domain switchability while maintaining high polarization. A pronounced improvement in piezoelectric performance is achieved in the doped composition, which exhibits higher d₃₃ values at lower electric fields due to facilitated non-180° domain switching and polarization rotation near the morphotropic phase boundary. Furthermore, efficient Yb3+-sensitized Er3+ upconversion photoluminescence under 980 nm excitation is observed, introducing multifunctional optical functionality absent in the undoped ceramic. Notably, only the Er3+/Yb3+-substituted ceramics display strong upconversion photoluminescence under 980 nm excitation, characterized by green (4S3/2 → 4I15/2) and red (4F9/2 → 4I15/2) emissions arising from efficient Yb3+ → Er3+ energy transfer. The coexistence of ferroelectric polarization and upconversion luminescence in NBEY-BT ceramics highlights their potential as multifunctional dipolar luminescent materials for advanced optoelectronic, sensing, and energy-harvesting applications.