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We report here the synthesis of visible light sensitive PbO and Ni doped PbO nanoparticles by hydrothermal method and characterized by UV-DRS, photoluminescence spectroscopy (PL), FTIR, X-ray diffraction (XRD), SEM, EDAX and TGA. Further an efficient approach has been developed for degradation of methyl blue (MB) in aqueous medium. The photodegradation of dye was monitored as a function of dye concentration, pH and catalyst amount has been determined. The reduction in the chemical oxygen demand (COD) revealed the mineralization of dye along with colour removal.

A novel, singular, and reusable In2O3 nanocatalyst was synthesized in the laboratory using a hydrothermal process. The In2O3 catalyst was characterized via specific strategies like Fourier transform infrared (FT-IR) was used to study the functional groups present in the In2O3 catalyst. Energy-dispersive X-ray spectroscopy (EDS) was used to analyze the elemental composition of the catalyst. A scanning electron microscope (SEM) was used to observe the morphology of the catalyst at a microscale level. X-ray diffraction pattern (XRD) was used to determine the crystal structure of the catalyst, and data analysis confirmed the formation of the crystalline phase of the In2O3 catalyst. The synthesized In2O3 catalyst was used for the synthesis of 1,8-dioxo-octa-hydro xanthene derivatives with 94% yield within 15 min of workup, this makes it a cost-effective and sustainable option for future synthesis reactions. Overall, the synthesis of this novel In2O3 nanocatalyst and its successful application in the synthesis of 1,8-dioxo-octa-hydro xanthene derivatives highlights the potential of green chemistry approaches in developing efficient and environmentally friendly chemical processes. [ABSTRACT FROM AUTHOR]

The CdO and modified CdO nanoparticles were synthesized using hydrothermal method. The absorption spectra, crystal phase, surface morphology, particle size, and surface area of CdO and modified CdO nanoparticles were studied by UV–DRS, FT-IR, XRD, SEM, TEM, TGA, PL, and BET surface area analysis. The present paper reports adsorption technique for the removal of chromium (VI) using CdO and modified CdO nanoparticles. The operating variables such as adsorbent dose, nature of adsorbent, adsorbate concentration, contact time, and pH were optimized. The technique was found to be highly useful and cost effective for removal of chromium (VI). The Langmuir and Freundlich models were evaluated using the experimental data and result showed that the Freundlich isotherm fit better than the Langmuir isotherm. [ABSTRACT FROM PUBLISHER]

We report here the synthesis of visible light sensitive PbO and Ni doped PbO nanoparticles by hydrothermal method and characterized by UVDRS, photoluminescence spectroscopy (PL), FTIR, X-ray diffraction (XRD), SEM, EDAX and TGA. Further an efficient approach has been developed for degradation of methyl blue (MB) in aqueous medium. The photodegradation of dye was monitored as a function of dye concentration, pH and catalyst amount has been determined. The reduction in the chemical oxygen demand (COD) revealed the mineralization of dye along with colour removal. [ABSTRACT FROM AUTHOR]

Second malignancies, mostly in the form of bone sarcomas, are known to occur in hereditary retinoblastomas, which usually present with bilateral disease. Only 2 cases of Ewing's sarcoma have been reported in the literature following sporadic unilateral retinoblastoma. A 5-year-old boy presented to our hospital with Ewing's sarcoma of the right humerus (proven by biopsy and immunohistochemistry) following successful treatment of retinoblastoma of the left eye with enucleation and chemotherapy 2 years previously. He was treated with 2 cycles of chemotherapy followed by radiation therapy. At 15 months follow-up, the tumor had reduced in size and the child had a good functional outcome. The cumulative risk of second malignancies in retinoblastoma survivors is 32%. Ninety-eight percent of second malignancies occur in patients with bilateral retinoblastoma. Germ line mutations have been considered in sporadic tumors occurring bilaterally and multifocal unilateral sporadic tumors. Bone and soft tissue sarcomas are the most common second malignancies. Radiation therapy increases the risk of developing a second malignancy in the irradiated field. Unilateral retinoblastomas, which comprise the majority of retinoblastomas, are not immune from the development of second malignancies. Close follow-up of all retinoblastomas--even in the early period--can improve the outcome by facilitating the early detection and aggressive treatment of second malignancies. [ABSTRACT FROM AUTHOR]

Discoid medial meniscus is a relatively rare pathology of the knee joint, with bilateral cases even rarer. Herein, we report the case of a 25-year-old man diagnosed with discoid medial meniscus in the right knee with a horizontal tear. Increased cupping of the medial condyle of the tibia, widening of the medial joint space and the presence of discoid meniscus in the right knee prompted investigation of the asymptomatic left knee with magnetic resonance imaging. The contralateral asymptomatic knee also showed evidence of discoid medial meniscus. The symptomatic knee was successfully treated by arthroscopic partial meniscectomy, with excellent functional outcome. [ABSTRACT FROM AUTHOR]

The article presents diagrammatic representation of the synthesis of tetrahydro benzo pyrans and benzylidene malonitriles and lead oxide (PbO) used as an efficient and reusable catalyst in the reaction.