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In this article, we investigate an extended class of strong uniqueness polynomial over non-Archimedean field than that was recently studied by Khoai-An [ $$p$$ -Adic Numb. Ultrametr. Anal. Appl. 12 (4), 276–284 (2020)]. We also find the unique range set of weight 2 corresponding to the SUPM which improve and generalize significantly the results of the paper of Khoai-An [ $$p$$ -Adic Numb. Ultrametr. Anal. Appl. 12 (4), 276–284 (2020)] and an earlier one due to Hu-Yang [Acta Math. Viet. 24 (1), 95–108 (1999)].

This paper describes an efficient, sustainable, one-step procedure for synthesizing substituted phenazines and phenoxazinones from commercially available ortho-substituted aromatic amines with very good yield (≥80%) in water. The procedure uses eosin Y (EY) as a photoredox catalyst at room temperature (RT). The highly reactive o-quinone-diimine or o-quinone-imine intermediate was characterized by the HR-MS technique.

In the paper, we have exhaustively studied the uniqueness of meromorphic function sharing two values with its $$k$$ th derivative counterpart. We have obtained a series of results each of which will improve and extend a number of existing results relevant to the content of the paper. We have also pointed out some gaps in one theorem in a paper due to Chen et al. (Pure Mathematics, 8(4), 378–382 (2018) (in Chinese)) and rectifying those gaps presented the corrected form of the same in a compact manner. Thus, we have been able to streamline all the results in this particular section of literature.

Development of materials for selective recovery of uranium (U) from contaminated water and sea water is necessary to solve the issues related to sources of U(VI) for nuclear energy and alleviating the environmental pollution. Phosphorous-doped Graphitic (P-Gc) material, synthesized under microwave irradiation (450 W, 40 s) has been utilized as potential adsorbent material for U removal in ppm level from contaminated water selectively at room temperature (RT). The influence of various environmental conditions (e.g. pH, contact time, ionic strength, and temperature) on U(VI) adsorption was investigated by batch method. Maximum Adsorption capacity (QM) was found 1186 mg g−1 from Langmuir fit and this could be due to high specific surface area of P-Gc (1635 m2/g) and the presence of phosphate functionalities (3.18 atomic wt% P according to XPS) on the adsorbent surface. The results of kinetic and thermodynamic studies revealed that the adsorption was a spontaneous and exothermic chemical process and the adsorption process could be better fitted by a pseudo-second order model, suggesting a chemisorption over physisorption. The adsorption of U(VI) on P-Gc was a multilayer uptake in lower concentration range of U(VI) and monolayer in higher concentration range of U(VI). The material has been reused for five cycles with almost no change in the efficiency which is very important for the wastewater treatment. 90 % of the adsorbed uranium was regenerated from P-Gc by simple acid treatment. Hence, P-Gc has a great promise in the quest to development of metal free adsorbent for uranium removal at RT.