Biocorrosion and its inhibition studies in seawater environment: A review

The problems induced by the microbiologically influenced corrosion (MIC) become progressively noticeable and causes high economic losses. The investigations on the biocorrosion mechanism and its inhibition is becoming important. In the current paper, the characteristics of the natural seawater are described. The biocorrosion by sulfate-reducing bacteria is studied with the corresponding mechanism. The inhibition efficiency of the ecological chitosan against the corrosion of materials in natural polluted seawater is reviewed

An Insight into All Tested Small Molecules against Fusarium oxysporum f. sp. Albedinis : A Comparative Review

Bayoud disease affects date palms in North Africa and the Middle East, and many researchers have used various methods to fight it. One of those methods is the chemical use of synthetic compounds, which raises questions centred around the compounds and common features used to prepare targeted molecules. In this review, 100 compounds of tested small molecules, collected from 2002 to 2022 in Web of Sciences, were divided into ten different classes against the main cause of Bayoud disease pathogen Fusarium oxysporum f. sp. albedinis (F.o.a.) with structure-activity relationship (SAR) interpretations for pharmacophore site predictions as (delta(-)center dot center dot center dot delta(-)), where 12 compounds are the most efficient (one compound from each group). The compounds, i.e., (Z)-1-(1.5-Dimethyl-1H-pyrazole-3-yl)-3-hydroxy but-2-en-1-one 7, (Z)-3-(phenyl)-1-(1,5-dimethyl-1H-pyrazole-3-yl)-3-hydroxyprop-2-en-1-one 23, (Z)-1-(1,5-Dimethyl-1H-pyrazole-3-yl)-3-hydroxy-3-(pyridine-2-yl)prop-2-en-1-one 29, and 2,3-bis-[(2-hydroxy-2-phenyl)ethenyl]-6-nitro-quinoxaline 61, have antifungal pharmacophore sites (delta(-)center dot center dot center dot delta(-)) in common in N1---O4, whereas other compounds have only one delta(-) pharmacophore site pushed by the donor effect of the substituents on the phenyl rings. This specificity interferes in the biological activity against F.o.a. Further understanding of mechanistic drug-target interactions on this subject is currently underway.Peer reviewe

Plants as a source of green corrosion inhibitors on mild steel in hydrochloric acid: The case of oil extract of leaves of Pistacia lentiscus from Saidia Morocco

peer reviewedThe aim of this work was to characterize the essential oils of Pistacia lentiscus (P.L) from Saidia Morocco and analysis by gas chromatograph interfaced with a mass spectrometer (GC-MS). The Corrosion inhibition effect of organic oil and extract of leaves of Pistacia lentiscus (P.L) of mild steel in 1M HCl solution was carried out using, gravimetric, electrochemical polarization and EIS methods. Experiments are performed by varying concentration of the inhibitor. The inhibition efficiency increases with increased organic oil and extract concentration to attain a maximum value of 96.34 % and 86.59% at 1g/L for oil and extract respectively. The study reveals that oil, was dominated by monoterpene hydrocarbons (44.99%) followed by xygenated monoterpenes (13.66%) and Sesquiterpene hydrocarbons (16.59%). Among them, limonene (18.92%), α-pinene (13.94%), β- caryo phyllene (6.93%) and terpinen-4-ol (5.57%) were identified as major components. The Pistacia lentiscus oil and extract acts a mixed inhibitor and showed a result of the growth in the compactness of the protecting film dressing. The organic oil and extract adsorbs on the mild steel surface according to a Langmuir isotherm adsorption model

An Insight into All Tested Small Molecules against Fusarium oxysporum f. sp. Albedinis: A Comparative Review

Bayoud disease affects date palms in North Africa and the Middle East, and many researchers have used various methods to fight it. One of those methods is the chemical use of synthetic compounds, which raises questions centred around the compounds and common features used to prepare targeted molecules. In this review, 100 compounds of tested small molecules, collected from 2002 to 2022 in Web of Sciences, were divided into ten different classes against the main cause of Bayoud disease pathogen Fusarium oxysporum f. sp. albedinis (F.o.a.) with structure–activity relationship (SAR) interpretations for pharmacophore site predictions as (δ−···δ−), where 12 compounds are the most efficient (one compound from each group). The compounds, i.e., (Z)-1-(1.5-Dimethyl-1H-pyrazole-3-yl)-3-hydroxy but-2-en-1-one 7, (Z)-3-(phenyl)-1-(1,5-dimethyl-1H-pyrazole-3-yl)-3-hydroxyprop-2-en-1-one 23, (Z)-1-(1,5-Dimethyl-1H-pyrazole-3-yl)-3-hydroxy-3-(pyridine-2-yl)prop-2-en-1-one 29, and 2,3-bis-[(2-hydroxy-2-phenyl)ethenyl]-6-nitro-quinoxaline 61, have antifungal pharmacophore sites (δ−···δ−) in common in N1---O4, whereas other compounds have only one δ− pharmacophore site pushed by the donor effect of the substituents on the phenyl rings. This specificity interferes in the biological activity against F.o.a. Further understanding of mechanistic drug–target interactions on this subject is currently underway

A new lignocellulosic material based on Luffa Cylindrica for Nickel (II) adsorption in aqueous solution

In this paper, a new natural lignocellulosic material based on Luffa Cylindrica, (LC), to adsorb the Ni (II) in the water. The Luffa Cylindrica powder (LCP) is characterized using different techniques. The effect of different operating parameters on the adsorption of Ni (II) ions is investigated. Batch adsorption experiments are performed as a function of adsorbent dose, pH, Nickel concentration, contact time and temperature.  The optimum conditions for maximum adsorption were attained at pH 6 and LC dose of 1 g/L. The results show that the increase in the temperature leads to decrease the adsorption quantity of Ni (II) on LCP up to the maximum in the range of 6.84-7.87 mg/g. On the other hand, the results of the adsorption isotherms follow the Freundlich model and the kinetic adsorption and the pseudo-second order reaction. Moreover, the thermodynamic study indicates that the adsorption process, which depends on the solution pH, is an exothermic and spontaneous phenomenon. Overall, the results show the adsorption behavior of this raw material that can be used as a low-cost alternative to commercial materials

An Insight into All Tested Small Molecules against Fusarium oxysporum f. sp. Albedinis: A Comparative Review

Bayoud disease affects date palms in North Africa and the Middle East, and many researchers have used various methods to fight it. One of those methods is the chemical use of synthetic compounds, which raises questions centred around the compounds and common features used to prepare targeted molecules. In this review, 100 compounds of tested small molecules, collected from 2002 to 2022 in Web of Sciences, were divided into ten different classes against the main cause of Bayoud disease pathogen Fusarium oxysporum f. sp. albedinis (F.o.a.) with structure–activity relationship (SAR) interpretations for pharmacophore site predictions as (δ−···δ−), where 12 compounds are the most efficient (one compound from each group). The compounds, i.e., (Z)-1-(1.5-Dimethyl-1H-pyrazole-3-yl)-3-hydroxy but-2-en-1-one 7, (Z)-3-(phenyl)-1-(1,5-dimethyl-1H-pyrazole-3-yl)-3-hydroxyprop-2-en-1-one 23, (Z)-1-(1,5-Dimethyl-1H-pyrazole-3-yl)-3-hydroxy-3-(pyridine-2-yl)prop-2-en-1-one 29, and 2,3-bis-[(2-hydroxy-2-phenyl)ethenyl]-6-nitro-quinoxaline 61, have antifungal pharmacophore sites (δ−···δ−) in common in N1---O4, whereas other compounds have only one δ− pharmacophore site pushed by the donor effect of the substituents on the phenyl rings. This specificity interferes in the biological activity against F.o.a. Further understanding of mechanistic drug–target interactions on this subject is currently underway

The Synergistic Effect of Chloride Ion and 1,5-Diaminonaphthalene on the Corrosion Inhibition of Mild Steel in 0.5 M Sulfuric Acid: Experimental and Theoretical Insights

International audienceThe inhibition efficiency of 1,5-Diaminonaphthalene (1,5DNA) compound was studied by itself as well as in a mixture that included sodium chloride (NaCl), noted [1.5DNA][Cl−], for mild steel in 0.5 M sulfuric acid. Gravimetric, electrochemical techniques and computational chemistry calculations were utilized for the assessment of corrosion inhibition efficiency and explanation of the mechanism involved during the corrosion inhibition process. The results show that inhibition efficiencies on mild steel increase with increase in concentration of the inhibitor and enhancement in inhibition efficiency was observed on addition of sodium chloride due to synergism. This inhibition has been attributed to the stabilization of adsorbed inhibitor film and, consequently, increasing its inhibitive properties. The [1.5DNA][Cl−] acts as mixed type inhibitor and the Nyquist curves show that with the increase in the concentration, the charge transfer resistance Rct increased. In addition, [1.5DNA][Cl−] obeyed Langmuir monolayer adsorption isotherm. Moreover, Molecular Dynamic Simulations and DFT calculations showed that [1.5DNA][Cl−] owned a higher adsorption ability

Improving the Quality and Safety of Barley by Controlled Homolactic Fermentation with Lactic Acid Bacteria

Fermentation by lactic acid bacteria can improve the nutritional and hygienic quality of barley, as well as its organoleptic properties. The aim of this study was to select a suitable lactic ferment to add value to barley through a controlled homolactic fermentation process, which can be used to produce a natural base product for broiler feed. Four different combinations of lactic strains were tested for their acidifying power, antibacterial activity, and fermentation performanceThe mixed culture of homolactic ferment FS4, composed of Lactobacillus plantarum (SC1), Pediococcus spp (SC4), and Lactococcus lactis ssp (SC5), showed the best result in terms of pH reduction, acidity production, and inhibition of spoilage bacteria. The in vivo application of the ferment FS4 on barley resulted in a decrease in pH to 4.12 after 15 days of fermentation, and an improvement in its hygienic quality, with the possibility of also enhancing its nutritional quality. This study demonstrated that FS4 is a suitable lactic ferment for valorizing barley through a controlled homolactic fermentation process, which can be used to produce a natural base product for animal feed with improved quality and safety

Preparation of cellulose-hydroxyapatite composites using 3D printing for biomedical applications

Abstract: Every year, around 140 million tons of synthetic polymers are produced worldwide. Because of their non-degradability in landfills, traditional plastics made with petroleum-based synthetic polymers have caused considerable environmental difficulties. Aware of the growing concern, the proactive approach involves the investigation of polymers derived from renewable and sustainable materials for the production of bioproducts. This strategy provides a viable and novel alternative for reducing greenhouse gas and hazardous emissions, increasing energy efficiency, and reducing the use of nonrenewable resources. As a result, much study has been conducted on numerous types of biopolymers, examining their characteristics and potential medical applications. The results of this research show that cellulose is the most used biopolymer thanks to its biodegradability and various biological properties. To improve these properties, it is desirable to combine cellulose with biomass which bears important biological properties. The choice was the use of Moroccan natural phosphate thanks to the important reserves of phosphate rocks in Morocco, for the preparation of hydroxyapatite and combining them with the prepared cellulose, and then the elaboration of HAp-Cellulose biocomposite, by the method of 3D printing. this biocomposite will be used in the biomedical field

A review of biomaterial as an adsorbent: From the bibliometric literature review, the definition of dyes and adsorbent, the adsorption phenomena and isotherm models, factors affecting the adsorption process, to the use of typha species waste as adsorbent

This paper presents a review of adsorption isotherms of some dyes from aqueous solutions by biomaterial. In this paper, we reported Typha waste as a model of biomaterial classified as a low-cost adsorbent. The paper also briefly discusses about the literature information from the definition of dyes and adsorbents, bibliometric analysis, adsorption phenomena, adsorption isotherm models, and factors affecting the adsorption, to the use of Typha species waste as a low-cost adsorbent. The operational parameters factors are explained in terms of pH, adsorbent dosage, contact time, and initial dye concentration that will affect the process of removing textile dye. The solution of pH turns out to be the most important condition in the adsorption process for anionic dye, a low pH value are preferable in contrast to cationic dye where the suitable pH value is high. For the adsorbent dose, the adsorption capacity increase along with the increment of adsorbent dosage due to the increase of the available amount of adsorption site. The contact time between the adsorbent and dye affects the efficiency of dye removal where a strong attraction force will shorten the time. As for the effect of dye initial concentration, increasing the initial concentration enhances the increment of adsorbent surface area to adsorb dyes. Several isotherm models are described. The Langmuir model is frequently used to evaluate the adsorption capacity of the Typha species waste as adsorbents. This review paper suggested that the accuracy level obtained from adsorption processes is greatly dependent on the successful modeling of adsorption isotherms. Typha biomaterial wastes can be considered as the new useful low-cost natural adsorbents for dye clean-up  operations in aquatic systems