An-Najah Staff

There is a growing trend in utilizing plant extracts and pharmaceutical compounds as corrosion inhibitors. Accurate identification of the essential oil of aerial parts of Pelargonium was obtained using hydrodistillation, gas chromatography and gas chromatography–mass spectrometry. The oil was predominated by citronellol (22.8 %). The inhibitory effect of essential oil and extract of Pelargonium was estimated on the corrosion of mild steel in 1 M hydrochloric acid (HCl) using weight loss, electrochemical impedance spectroscopy (EIS) and Tafel polarization curves. Inhibition was found to increase with increasing concentration of the essential oil and extract of Pelargonium. The effect of temperature on the corrosion behavior of mild steel in 1 M HCl with addition of essential oil and extract was also studied, and the thermodynamic parameters were determined and discussed. Values of inhibition efficiency were calculated from weight loss, Tafel polarization curves, and EIS. All results are in good agreement. Polarization curves showed that essential oil and extract of Pelargonium behave as mixed type inhibitors in HCl (1 M). The results obtained showed that the essential oil and extract of Pelargonium could serve as an effective inhibitor of the corrosion of mild steel in HCl solution. To avoid any unexpected toxicity, the majority of compounds have been studied by using POM analyses. 

There is a growing trend in utilizing plant extracts and pharmaceutical compounds as corrosion inhibitors. Accurate identification of the essential oil of aerial parts of Pelargonium was obtained using hydrodistillation, gas chromatography and gas chromatography–mass spectrometry. The oil was predominated by citronellol (22.8 %). The inhibitory effect of essential oil and extract of Pelargonium was estimated on the corrosion of mild steel in 1 M hydrochloric acid (HCl) using weight loss, electrochemical impedance spectroscopy (EIS) and Tafel polarization curves. Inhibition was found to increase with increasing concentration of the essential oil and extract of Pelargonium. The effect of temperature on the corrosion behavior of mild steel in 1 M HCl with addition of essential oil and extract was also studied, and the thermodynamic parameters were determined and discussed. Values of inhibition efficiency were calculated from weight loss, Tafel polarization curves, and EIS. All results are in good agreement. Polarization curves showed that essential oil and extract of Pelargonium behave as mixed type inhibitors in HCl (1 M). The results obtained showed that the essential oil and extract of Pelargonium could serve as an effective inhibitor of the corrosion of mild steel in HCl solution. To avoid any unexpected toxicity, the majority of compounds have been studied by using POM analyses.

There is a growing trend in utilizing plant extracts and pharmaceutical compounds as corrosion inhibitors. Accurate identification of the essential oil of aerial parts of Pelargonium was obtained using hydrodistillation, gas chromatography and gas chromatography–mass spectrometry. The oil was predominated by citronellol (22.8 %). The inhibitory effect of essential oil and extract of Pelargonium was estimated on the corrosion of mild steel in 1 M hydrochloric acid (HCl) using weight loss, electrochemical impedance spectroscopy (EIS) and Tafel polarization curves. Inhibition was found to increase with increasing concentration of the essential oil and extract of Pelargonium. The effect of temperature on the corrosion behavior of mild steel in 1 M HCl with addition of essential oil and extract was also studied, and the thermodynamic parameters were determined and discussed. Values of inhibition efficiency were calculated from weight loss, Tafel polarization curves, and EIS. All results are in good agreement. Polarization curves showed that essential oil and extract of Pelargonium behave as mixed type inhibitors in HCl (1 M). The results obtained showed that the essential oil and extract of Pelargonium could serve as an effective inhibitor of the corrosion of mild steel in HCl solution. To avoid any unexpected toxicity, the majority of compounds have been studied by using POM analyses.

A computation model has been developed for the rational design of bioactive
pharmacophore sites as anti-Mycobacterium Tuberculosis (MT) and anti-Trypanosoma cruzi
(TC) candidates. The 40 compounds 1-40 analyzed have been previously screened for their
antitubercular and antitrypanosomal activity. The highest anti-Trypanosoma cruzi (TC)
activity is obtained for compounds 8 and 18 which exhibited low IC50 values (9.2 and 10.8
M), almost equal to clinical drug, Nifurtimox (7.7 M; 100% Inhib.). This could be
attributed to the existence of two synergic (O---N-) and (O---O-) anti-Tryposomal
phramacophore sites. In contrast to compounds 8 and 18 which contain electro-attractor
groups (R1, R2 = F), analogue compounds 1 and 13 with electro-donor or only hydrogen (R1,
R2 = CH3, H) shows best antibacterial activity (MIC = 0.977 and 1.190 g/mL) very close to
antitubercular activity of Rifampicin (MIC = 0.125 g/mL). This could be attributed to the
existence of (O---NH+) antibacterial phramacophore site.

POM virtual screening and docking of compounds 2-iminobenzimidazoles (IBIZ) as a novel class of trypanothione reductase inhibitors are described. These 2-IBIZ display potent trypanocidal activity against Trypanosoma brucei rhodesiense, with low cytotoxicity. A hypothetical mechanism based on bioinformatic analyses is proposed. The ligands with two neighbor pockets leading to bimetallic (M-Ligand-M/enzyme) complexes are more active than similar ligand without the two terminal arms.

This paper surveys the various naturally occurring flavonoids that have been isolated from different natural sources. This is the first petra/osiris/molinspiration (POM) analysis published on this topic. The present study furnishes an overview of the 32 flavonoids and anti-HIV-Integrase activity of their metabolite species. The aqueous and/or ethanol extraction of flavonoids have often been used in traditional medicine, and therefore have also been studied for their antitumor, antioxidant, antiviral, anti-algal, antimicrobial, cytotoxic and anti-inflammatory, and significant hepatoprotective and cardiovascular activity without any criteria of selection. Here, on the basis of POM analyses, a simple, economic, quick and efficient bioinformatic platform, it now becomes easy and possible to predict and optimize flavonoids bioactivity.

A series of 18 new 3,4-disubstituted-isothiochromeno[3,4-e][1,2]oxazines 28–45 has been obtained from the 3′,4′-di-substituted-4′H-spiro[isothiochromene-3,5′-isoxazol]-4(1H)-ones 10–27 in refluxing HCl acid/ethanol. A series of 15/18 compounds 28–45 was selected by the National Cancer Institute (NCI, Bethesda, USA) and were evaluated against a full panel of 60 primary human tumor cell lines derived from nine human cancer types, all of which showed antiproliferative activity in the micromolar range. The most active compound number 37 (S722910) showed high potency against all the tested cell lines with a GI50 mean value in the range of 30–80 μM; TGI and LC50 values were 12–16 μM having positive response on 98 and 63 % of the tested cell lines (Breast-MCF7 and NCS-SF-268) respectively.