facile and efficient route for the synthesis of highly reduced graphene oxide (PE-HRG) by the green
reduction of graphene oxide (GRO) using the Pulicaria glutinosa plant extract (PE). The phytomolecules
present in the P. glutinosa extract are not only responsible for the reduction of GRO, but also for the
functionalization of the surface of the PE-HRG nanosheets and stabilize them in various solvents,
thereby limiting the use of any other external and harmful chemical reductants and surfactants. The

The inhibitive effect of Launaea nudicaulis methanolic (MLN) and aqueous acidic (ALN) extracts on the corrosion of mild steel in 1.0 M HCl solution was investigated by using weight loss, Tafel plots, linear polarization, electrochemical impedance spectroscopy (EIS) as well as SEM and EDS techniques. It was found that both extracts (MLN and ALN) inhibit remarkably the corrosion of mild steel in acidic solution and inhibition efficiencies increased with the increase of extracts concentration.

Green synthesis of nanomaterials finds the edge over chemical methods due to its environmental compatibility.
Herein, we report a facile and eco-friendly method for the synthesis of palladium (Pd) nanoparticles
(NPs) using an aqueous solution of Pulicaria glutinosa, a plant widely found in a large region of Saudi
Arabia, as a bioreductant. The as-prepared Pd NPs were characterized using ultraviolet-visible (UV-vis)
spectroscopy, powder X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive

The essential oil obtained from aerial parts of Myrtus communis grown in the central part of Saudi Arabia was
analyzed by gas chromatography-based techniques (GC–FID, GC–MS, Co–GC, LRI determination, database, and
literature search) using polar as well as non-polar columns, which resulted in the identification of a total of sixty-five
components accounting for 98.2% of the total oil composition. The oil composition was found to be dominated by
monoterpene components accounting for 89.3% of oil composition. Sesquiterpenes (4.8%) and their oxygenated

Chemical investigation of ethanolic extract of M. grandiflora wood led to the isolation of seven secondary metabolites.

A simple and convenient synthetic method for the direct synthesis of a series of polysubstituted analogues of the putative antifungal agent 4-methyl-2-phenylquinoline, a mimic of the natural bioactive 4-methoxy-2-phenylquinoline is reported.

Two benzofurans (1, 2) along with five known compounds (3–7) were isolated from the seeds of S. obassia.
Their structures were elucidated as methyl 3-[7-methoxy-2-(3′,4′-methylenedioxyphenyl)-5-benzofuranyl]-
propionate (1), methyl 3-[2-(3′,4′-methylenedioxyphenyl)-5-benzofuranyl]-propionate (2), egonol (3),
egonolacetate (4), egonol-2-methylbutanoate (5), 7-demethoxyegonol-2-methylbutanoate (6), and stigmasterol
(7) on the basis of their comprehensive spectroscopic analysis including 2D NMR data. Compounds 1, 2 are

Biological and chemical investigations were carried out to evaluate the antimicrobial potential of Melaleuca genistifolia leaf oil for herbal medicines. The disk diffusion and micro broth dilution methods were used for the evaluation of the antimicrobial activity of the essential oil and its major constituent, methyl eugenol against the five selected bacterial and five fungal strains.The oil was active against all the tested bacterial and fungal strains. The oil was highly active against Staphylococcus epidermidis and significantly active against S.

The leaf and stem of Callistemon polandii, on hydrodistillation, gave 0.008% and 0.004% of oils respectively on a fresh weight basis. GC and GC-MS analysis of the oils resulted in the identification of 60 and 44 constituents, representing 98.2% and 99.9% of the oils from the leaf and stem respectively.  The major constituents in the leaf oil of C. polandii were palmitic acid (25.2%), tetradecanoic acid (10.8%) and caryophyllene oxide (9.6%).

The Et2O-soluble fraction from the bark of Magnolia kobus led to the isolation of two new lignans,
(þ)-(7a,7’a,8a,8’a)-3’,4,4’,5,5’-pentamethoxy-7,9’:7’,9-diepoxylignan-3-ol (1) and (þ)-(7a,7’a,8a,8’a)-
4,5-dimethoxy-3’,4’-(methylenedioxy)-7,9’: 7’,9-diepoxylignan-3-ol (2), along with five known lignans
3 – 7. Their structures were established on the basis of various spectroscopic analyses including 1D- (1H,
13C, and DEPT) and 2D-NMR (COSY, NOESY, HMQC, and HMBC) and by comparison of their
spectral data with those of related compounds.