Bioaccumulation of heavy metals in sea turtles from the west coast of India

Sea turtles are widely distributed in the tropical, sub-tropical and temperate waters. Recent reports have indicated that their populations are threatened by the problem of marine pollution . (Stroelli et al., 1998). Heavy metals are one of the major pollutants and have the nature to concentrate in the tissues of animals and their concentrations vary according to biological process such as age, sex, reproduction and migratio

Biogenesis of silver nanoparticles using leaf extract of Turnera ulmifolia Linn. and screening of their antimicrobial activity

Development of nontoxic and clean techniques for the synthesis of silver nanoparticles (Ag NPs) has attracted increasing attention in recent years. The biological synthesis of silver nanoparticles using Turnera ulmifolia plant leaf extract was studied in present investigation. The synthesized nanoparticles were confirmed by color changes from pale green to reddish brown and characterized by UV-Visible spectrophotometer. A peak between 415 nm to 425 nm was obtained on spectrometer characterized the biosynthesis of silver nanoparticles. The synthesized nanoparticles also showed antibacterial activity against four disease causing microorganisms

Methyl (Z)-2-[(4-bromo-2-formyl­phen­oxy)meth­yl]-3-(4-methyl­phen­yl)acrylate

In the title compound, C19H17BrO4, the dihedral angle between the two benzene rings is 82.9 (2)°. The mol­ecular structure is stabilized by an intra­molecular C—H⋯O hydrogen bond, which generates an S(7) ring motif. The crystal packing is stabilized by C—H⋯O hydrogen bonds, which generate two centrosymmetic ring systems with R22(18) and R22(14) graph-set motifs. The crystal packing is further stabilized by inter­molecular π–π inter­actions [centroid–centroid distance = 3.984 (2) Å]

(E)-6-Methyl-3-(2-methyl­benzyl­idene)­chroman-2-one

In the title compound, C18H16O2, the heterocyclic ring of the chroman-2-one system adopts a slightly distorted screw-boat conformation. The dihedral angle between the least-squares planes of the coumarin ring system and the benzene ring is 67.5 (1)°. The crystal packing features C—H⋯O hydrogen bonds, which link the mol­ecules into centrosymmetric R22(8) dimers, and C—H⋯π inter­actions