The current work deals with the synthesis of Nitrosopyrazolones and their metal complexes with some transition metals. These were then characterized by various spectroscopic techniques like UV-Visible, FT-IR, 1H and 13C-NMR. Electrochemical studies were conducted in order to rationalize their redox behavior. These were then screened against Hep-G2 cancer cell line showing promising results.

Diazo compounds of 2-aminobenzoic acid with H-acid and 4-Napsa as coupler and their metal complexes were synthesized and characterized by various spectroscopic techniques like UV, FT-IR, NMR and colorimetric studies. The color data analysis showed their active participation towards the fastness properties on fabric twils. The resultant dyes were then screened against gram negative, positive bacterial and fungal strains which gave promising results.

This study investigated the potential use Pycnanthus angolensis (African/false nutmeg) exudates/resin as inhibitive materials against corrosion of reinforcing steel founded in the high salinity region. The accelerated corrosion test is an impress current technique, an effective technique for examining the corrosion process of steel in concrete and for assessing damage to the concrete cover protection to the steel bar and mechanical properties if steel bar modifications. The maximum yields obtained from the controlled and coated samples were -110.49mV and -114.7mV, which indicate the relationship between corrosion potential and probability in the reference range 𝐸corr > −200mV; For uncoated samples, the maximum calculated value is -317.5mV, the result is within the reference value of the dependence between corrosion potential and probability of −350mV ≤ 𝐸corr ≤ −200mV indicates a high-value range of 10% or indicates the possibility of unsafe corrosion. The maximum value calculated from the concrete resistance of the controlled sample concrete is 34.33% as compared to the corroded and coated values of 36.6% and 58.32% and the maximum difference percentage of control is 0.4% compared to the corroded and coated value of 0.24% and 0.59%. The results of controlled samples coated with concrete resistance obtained the maximum mean values of 12.47kΩcm and 14.68kΩcm with a description of the value 10 < 𝜌 < 20 (low) compared to the corrosion value of 9.31kΩcm with Specifications 5 < 𝜌 < 10 (high). The calculated yield strength maximum percentage value of the controlled yield strength was 3.56% compared to the corroded and coated values -4.88% and 5.34% and the possible difference values of 0.49% controlled, 0.19% corroded, and 0.21% covered. The calculated maximum percentage of the controlled ultimate tensile strength is 3.34% relative to corrosion and the coating value is -5.02% and 5.41% and the possible difference value is 0.12% controlled, 0.11% corroded and 0.12% coated. The maximum calculated strain ration percentage for comparison checked up to -5.86% versus corroded 6.06% and coated -5.83% and different peak values checked up to 0.04%, corroded 0.0079%, and coated 0.08% The comparison results show that the low load carrying capacity is caused by the effect of corrosion attack on the uncoated (corroded) elements, which damage the reinforcing steel fibers, ribs, and passive formation and surface modification. The observed mean values for the coated samples were associated with the corrosion resistance potential to penetrate the reinforcing steel with the formation of a protective membrane; This attribute indicates the efficiency and effectiveness of the exudate/resin as an inhibitor against corrosive effects. of reinforced concrete structures exposed to the edges of strong, high salinity marine areas. The decrease of cross-sectional area in mean and percentage values indicates that the corrosion effect causes a decrease in diameter and cross-sectional area, fiber degradation, rib reduction and surface modification, while the exudate/resin-coated elements are validated in the work due to differences in coating thickness. For comparison the results obtained of unit rebar weight loss/gain steel showed a reduction of mean and percentile values for coatings from 0.063 kg to 0.05 kg and corrosion 29.17% to -20.97% and the aggregate results show that the corrosion effect causes a reduction in weight/reduction of the corroded sample compared to the percentile layer and an increase in mean, resulting in a slight increase in volumearound the layer thickness. This study shows the efficacy and effectiveness of exudate/resin as an anti-corrosion anti-corrosion material in reinforcing steel embedded in samples of concrete slabs exposed to induced corrosion.

The study examined the use of exudates/resins from extracts of natural origin for environmentally friendly materials derived from tree trunks. Gummy exudates/resin was applied directly to the steel reinforcement by the coating of different thicknesses. The purpose of this study is to determine the role of exudates/resin against adverse attack on reinforcement embedded in concrete, exposed to the severe environment due to its waterproofing and resistance to surface modification of steel reinforcement and coating application. In the flexural strength test, the maximum value was 28.36% compared to the corroded and coated sample values of -20.02% and 28.37%, respectively. Mean differential and percentile range controlled (0.96kN and 3.07%), corroded (0.82kN and 2.08%), coated (1.13kN and 3.33%). The results of midspan deflection mean value and percentage difference were controlled (0.27kN and 1.66%), corroded (0.57kN and 4.61%), and coated (0.27kN and 1.68%). The results showed a lower elongation load in the controlled and coated samples with reduction values over the corroded samples with higher elongation loads and higher values compared to the reference range (controlled). The cross-sectional area of reinforcing steel recorded the mean differential values and calculated percentile values, corroded (0.06 mm and 5.21%) and coated values (0.05 mm and 7.12%). The results obtained showed the effect of corrosion on the mechanical properties of reinforcing steel with a decrease in the diameter of the reinforcement in the corroded sample, while the coated sample showed an increase due to the thickness of the exudates paste layer. The differential computed average and percentile value of the yield strength and ultimate tensile strength are controlled (5.31MPa and 1.16%) and (2.53MPa and 0.02%), the corroded values are (3.18MPa and 1.05%) and (2.53MPa and 0.02%), the coated values are (5.3MPa and 1.16%) and (2.53MPa and 0.02%). The percentages of maximum weight loss/gain for corroded and coated samples were -28.54% and 43.9%, respectively. The calculated data showed a decrease in the value of the corroded sample as a result of the corrosion attack, which led to a decrease in the registered weight, whereas the coated sample showed an increase in weight compared to the reference value of the controlled sample due to the different coating thickness.