In the present paper, we continue the study on generalized fuzzy soft topological spaces and investigate the properties of generalized fuzzy soft semi open (closed) sets and generalized fuzzy soft semi interior (closure) sets. Also, we introduce generalized fuzzy soft semi continuous mappings and generalized fuzzy soft semi open (closed) mappings which are important for further research on generalized fuzzy soft topology

In the present paper, we continue the study on generalized fuzzy soft topological spaces and investigate the properties of generalized fuzzy soft semi open (closed) sets and generalized fuzzy soft semi interior (closure) sets. Also, we introduce generalized fuzzy soft semi continuous mappings and generalized fuzzy soft semi open (closed) mappings which are important for further research on generalized fuzzy soft topology

In this work, a sensitive and simple electrochemical sensor was constructed for the quantitative analysis of valrubicin (VLB), as a chemotherapy drug, in biological samples based on MWCNTs‐OH, CeO2NPs, AuNPs and functionalized glassy carbon microspheres (FGCM) modified electrode (Au−CeO2@MWCNT‐OH/FGCME). The new nanocomposite Au−CeO2@MWCNT‐OH/FGCM produced an electrocatalytic effect towards the electrochemical oxidation of VLB. The electrochemical behavior of the Au−CeO2@MWCNT‐OH/FGCME was also investigated using EIS and CV. The experimental and operation parameters that affect the sensitivity of the sensor were optimized. SWV was utilized for the electrochemical analysis of VLB. The oxidation peak currents were linearly dependent on the concentration of VLB in the range of 7.10×10−8 M to 5.8×10−7 M. The detection limit of VLB was found to be 1.56×10−9 M which was more sensitive than the reported method. The possible coexistence biological matrix had no interference effect on the determination of VLB. The fabricated sensor was also effectively employed to the sensitive detection of VLB in human body fluids. The interaction of VLB with salmon testes and calf thymus double‐stranded DNA (st‐DNA and ct‐DNA) on Au−CeO2@MWCNT‐OH/FGCME has been further studied by cyclic voltammetry. The corresponding binding constant (K), surface concentration (Γ) and Gibbs free energy (ΔG°) were computed for the free VLB and the bound VLB‐dsDNA complex. The obtained results revealed that VLB binds to DNA with a high binding constant as well as the K value for VLB‐st‐DNA (K=1.81×105 M−1) is higher than that of VLB‐ct‐DNA (K=4.99×104 M−1).

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A series of CuxCo3−xO4 catalysts were prepared and presented as active and stable catalysts in the oxidation of CO into CO2 at relatively low temperatures. These nanoparticles were synthesized by co-precipitation assisted ultrasonic radiation method. The thermal behavior, structural, spectroscopic, texture, and morphological characterizations were carried out adopting TG-DTA, XRD, XPS, FTIR, N2-sorption, and TEM techniques. In addition, electrical conductivity and surface chemisorbed oxygen measurements were also studied. The quantity and strength of basic sites were estimated using CO2-TPD. The results revealed that the insertion of Cu2+ with values of x from 0.25 to 0.75, into Co3O4 catalysts calcined at 400 °C monotonically increases the SBET, the amount of surface chemisorbed oxygen, catalyst basicity, electrical conductivity and catalytic activity. In addition, the activity increases to an optimal amount of Cu2+ substitution for Co2+ with x=0.75 which exhibited the most active catalyst with a value of T100 of 125 °C. Results of CO2-TPD demonstrated that, incorporation of Cu2+ with a value of x of 0.75 not only increases the total basicity, but also altered strength and distribution of basic sites over the surface of the catalyst. The role of the active redox sites existed on the surface of these catalysts such as, Co3+/Co2+, Cu2+/Cu+ and Co3+/Cu+, which are accountable for such alteration, was also debated. The most active catalyst Cu0.75Co2.25O4 displayed a long-term stability up to 100 h.