Abstract:\nLead sulfide (PbS) nanocrystals anchored on nitrogen-doped multiwalled carbon nanotubes (N-CNTs) are synthesized employing an environmentally friendly and inexpensive wet chemistry process. PbS/N-CNTs composites are examined by scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and ab initio theoretical calculations to determine their morphological, optical, and structural properties. The PbS nanoparticles exhibit a 15 nm particle size with a face-centered cubic crystal structure and are homogeneously distributed along the carbon nanotubes. Nitrogen doping on CNTs acts as binding sites for the PbS clusters as Ab initio theoretical study suggests.
The current research aims to identify the chemical constitutes of the essential oils of the extracted Carduus pycnocephalus by Gas Chromatography-Mass Spectroscopic analysis (GC-MS) and to assess the biological profiles of the plant and its botanical ingredients as a precise antioxidant, and anticancer, as well as, antimicrobial agents. The extraction process of the medicinal plant by methanol provided a possibility to extract and identify the polar chemical constitutes that have the most effective categories of components. The DPPH antioxidant potency of the flower extract is the most potent with IC50 = 30.69 mg L-1 followed by leaves (IC50= 32.78 mg L-1), stem (IC50= 41.31 mg L-1), and root (IC50= 46.84 mg L-1). Leaf, and flower extracts revealed the most potent activities than the antibiotic standards against E. coli, S. typhimurium, and B. cereus species with inhibition zones ranged from 20-26 mm. Also, the extracted C. pycnocephalus revealed a moderate cytotoxic effect against hepatocellular carcinoma (HepG2) tumor cell line using MTT assay with IC50= 46.2 µg mL-1. The experimental interpretations inveterate the potential of C. pycnocephalus extract indicated its biological impacts as antioxidant, antibacterial, and moderate cytotoxic agents that provided the ease of using it in cancer therapy.
Abstract\nIn this work, we present results on micro and nanoparticles of CuZnO-Carbon nanoparticles synthesized utilizing arc-Discharge method with the system immersed in distilled water, using a current from 200 A with constant voltage (27 V). These structures are characterized using scanning electron microscopy (SEM), X-ray diffraction, Raman spectroscopy and Uv-Vis spectroscopy. Our results demonstrate that such nanostructures can be prepared at low cost with high quality.
Fourteen leafy vegetables sold in Ekiti-State major markets, Nigeria were investigated for mineral composition, mineral safety index, mineral bioavailability, phytochemicals and non-starch polysaccharide contents using standard analytical procedures. The results (mg/kg) were: minerals: Na (17.8-47.4), K (146-435), Ca (20.8-53-0), Mg (99.0-283), Cu (0.015-0.083), Co (0.00012-0.03), Fe (2.6-8.07), Zn (0.671-1.52), Se (0.0001-0.002) and P (1.63-6.31). Mineral safety index showed that all the examined minerals were positive and would not overload the body of consumers. Phytochemical constituents (mg/100g) were (mg/100g): tannins (0.10- 0.390), phenolics (0.03-250), alkaloids (0.011-2.25), saponin (0.6-3.88), flavonoids (0.380-0.950), phytates (4.95-7.93), oxalates (0.230-0.590) and phytin phosphorous (1.39-2.23). [Ca]/[Phy], [Ca][Phy]/[Zn] and [Phy]/[Fe] were: 5.42-13.2, 0.17-1.32 and 0.63-1.73 respectively. Non-starch polysaccharide levels (%): NDF (4.65-11.2), ADF (3.33-9.31), lignin (1.40-4.26), cellulose (1.44-3.76) and hemicellulose (1.32-1.93). Significant differences existed among the Na, K, Ca, Mg, Ca/P, K/Na, Zn/Cu and milliequivalant ratio at P= 0.05 (Chi square, χ2 test) across the fourteen vegetable samples. Generally, they could be considered as potential sources of nutrients in human nutrition.
Effective and productive outcome on the part of administrators can be achieved only when they are cognizant of what and how to perform duties and responsibilities in an institution. This paper discusses about development of Job Activity Analysis Scale and its application for assessing Job Activity of Educational Administrators
The main objective of this paper is to discuss the mapping properties of certain integral operators for the classes of analytical functions which map onto parabolic regions to bounded boundary rotations
The isobars map (local base-level map) represents the erosional stages and it gives a strong relationship between different Strahler order streams and the local topography. This approach is quick, efficient and reliable to delineate neotectonic influence within the same rock types. In this research we evaluate the geomorphic landforms of Potwar Plateau and Kalabagh fault zone using local base level approach. The purpose is to demarcate boundaries and to see whether they are influenced by the active tectonics or lithologic difference. For this purpose we extracted the drainage network from SRTM 90m DEM in the form of second and third Strahler orders. The isobase map was constructed based on intersection of contours from the DEM and their intersection with the selected stream orders. We observed different base-level anomalies that relate with the prominent neotectonic features and lithological boundaries as presented in the published geological maps. The orientation of the isobase lines correspond well with the local and regional structures in the study area.
