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![Molecular structure of [Hg(HL)2Cl2] with thermal ellipsoids of 50% probability level (atoms generated by C2 rotational symmetry are marked with ′)](publication/347834155/figure/fig2/AS:11431281173715413@1689017372813/Molecular-structure-of-HgHL2Cl2-with-thermal-ellipsoids-of-50-probability-level.png)
Molecular structure of [Hg(HL)2Cl2] with thermal ellipsoids of 50% probability level (atoms generated by C2 rotational symmetry are marked with ′)
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![Molecular structure of [Hg(HL)2Cl2] with thermal ellipsoids of 50%...](publication/347834155/figure/fig2/AS:11431281173715413@1689017372813/Molecular-structure-of-HgHL2Cl2-with-thermal-ellipsoids-of-50-probability-level_Q320.jpg)
![Packing of [Hg(HL)2Cl2] viewed along crystallographic b axis](publication/347834155/figure/fig3/AS:11431281173697366@1689017373301/Packing-of-HgHL2Cl2-viewed-along-crystallographic-b-axis_Q320.jpg)
The new mercuric complex [Hg(HL)2Cl2] incorporating salicylaldimine ligand (HL = 2‐((pyridin‐3‐ylimino)methyl)phenol) was fabricated where the ligand molecules behaved in a monodentate manner via their pyridine nitrogen atoms. In addition to elemental characterization, X‐ray crystallographic studies of the complex revealed its packing in a monoclin...
Citations
... Agricultural practices also contribute to the HM pollution through the uncontrolled using of fertilizers, fungicides, herbicides, pesticides, irrigation with wastewater, and soil amendments (Giri et al. 2017). Phosphate fertilizers contain nickel, lead, zinc, and cadmium; pesticides also contain active ingredients like mercury, copper, lead, and arsenic (Paranjape et al. 2014;Ibrahim et al. 2021). Urbanization could generate HMs like Fe, Mn, and Cr in the solid waste, sewage, wastewater, and sludge (Kothe et al. 2010). ...
The marine ecosystem, which makes up around two-thirds of the planet’s surface, suffers from aggressive heavy metal contamination, especially in the last few years. This pollution causes shifting in many marine life forms threatening our fisheries and human health. The natural sources of marine heavy metal pollution are rock erosion, and volcanic dust, while the artificial sources are related to human attitudes like sewage, ship accidents, industrial wastes, and agricultural wastes. Because they are so common in nature, microorganisms also predominate in locations where heavy metals have been contaminated. Heavy metals are easily changed by them into harmless forms. Microorganisms have two responding mechanisms of heavy metal contamination that comprise enzymatic breakdown of the target contaminants and/or heavy metal resistance. In this chapter we will discuss marine heavy metal contamination sources, their risks to the marine life forms, and different responses of marine fungi to heavy metal contamination.
... An important class of the Schiff base ligands, derived from reactions between primary amines and salicylaldehydes, is the salicylaldimines [35,36]. These flexidentate ligands form complexes with tuned redox, magnetic and spectral characteristics with regard to the metals [37,38]. ...
The complex [Ni3L6]•1.56CH2Cl2 (HL = (E)-2-(((3,4-dimethylphenyl)imino)methyl)phenol) was isolated in the monoclinic C 2/c space group. All nickel atoms are six-coordinate with a nickel atom bound to only O-phenol atoms, while the two terminal cations are surrounded by N3O3 atoms. This complex and its ligand (20 mg/mL in DMSO) were tested as antimicrobials. Against two fungi, the complex and amphotericin B caused 13 and 21 mm inhibition diameters, respectively, in Candida albicans plates. Against four bacteria, the ligand inhibited only Staphylococcus aureus with a 10 mm diameter, and the complex induced inhibitions with 10–13 mm (ampicillin afforded 21–26 mm inhibitions). Against cancer (MCF-7) and normal (BHK) cells, the ligand provided virtual inactivity, but great activities (IC50 = 5.44 and 11.61 μM, respectively) were shown by the complex. Doxorubicin afforded activities with IC50 = 9.66 and 36.42 μM in these cells, respectively. The ligand and its complex offered 100% germination of a drought-sensitive wheat cultivar (90% for control), but, under drought, the complex, ligand and control gave germination with 85, 75 and 95%, respectively. Under normal irrigation and drought, the control and complex afforded 100% germination, and the ligand afforded 95% germination for a drought-resistive wheat cultivar.
Background: More studies using cobalt complexes as drugs are needed. Results: The drug action of two cobalt salicylaldimines was determined. The complexes and amphotericin B (20 mg/ml) inhibited Candida albicans at 9-15 and 21 mm. This concentration of both ligands inhibited Staphylococcus aureus at 10 mm and one ligand inhibited Escherichia coli at 9 mm, but the complexes and ampicillin inhibited four bacteria at 9-20 and 21-26 mm. The ligands were inactive against cancer and normal cells, but the complexes and doxorubicin provided IC50 values of 28.18-54.19 and 9.66 μM against MCF-7 cells and 15.76-20.49 and 36.42 μM against BHK cells. Conclusion: The ligands' activity was much improved by complexation, although they remained substandard.
Collagen integrity should be considered on using a sterilizing agent for fish skin grafts. This study defined the optimal concentration of silver nanoparticles (Ag NPs) for sterilization of fish skin grafts without disrupting collagen content based on microbiological and histological evaluation. Strips of tilapia skin (n = 5) were randomly allocated to be immersed in Ag NPs solution at different concentrations of 25, 50, 100, and 250 µg/mL, respectively, for 5 min. The treated skin strips underwent bacteriological and histological evaluation. Yeast and fungi were more sensitive to Ag NPs than bacteria. On increasing the nanoparticles concentration, the total counts of aerobic bacteria decrease giving 933.3 ± 28.67, 601 ± 27.66, 288 ± 16.8, 15 ± 4.08 (CFU/cm² ± S.D) at 25, 50, 100, and 250 µg/mL, respectively, comparing with untreated sample (1453.3 ± 57.92). Yeasts and filamentous fungi also exhibited a similar response, achieving a complete inhibition at 100 and 250 µg/mL. Bacillus cereus and Escherichia coli were the dominant aerobic bacteria, Candida albicans and Rhodotorula glutinis were the dominant aerobic yeasts, whereas Aspergillus niger, Aspergillus fumigatus, and Rhizopus stolonifer were the dominant aerobic fungi. The collagen fibers were loose with a wavey pattern at 25 µg/mL, wavey and slightly disorganized at 50 µg/mL, highly disorganized at 100 µg/mL, and compactly arranged and slightly loose at 250 µg/mL. Ag NPs at a concentration of 250 µg/mL could be considered a reliable and feasible method for the sterilization of fish skin grafts before application on human skin with an effective antimicrobial effect and less disrupting impact on collagen content.
