(Z)-2-benzylidene-2H-[1, 4] benzothiazin-3-one(T1) as New Synthesized Corrosion Inhibitor for Mild Steel in 0.5 M H2SO4

The corrosion inhibition of mild steel in 0.5 M H2SO4 solution by (Z)-2-benzylidene-2H-[1,4]benzothiazin-3-one: (T1)  has been studied using electrochemical polarization , electrochemical impedance spectroscopy (EIS) and weight loss methods. The corrosion inhibition efficiency measured by all the three techniques was in good agreement with each other. The results showed that T1 is a very good inhibitor for mild steel in acidic media. The inhibition efficiency increases with increasing inhibitor concentration. It acts as a mixed-type inhibitor. EIS plots indicated that the addition of T1 increases the charge-transfer resistance (Rct), decreases the double-layer capacitance (Cdl) of the corrosion process, and hence increases inhibition efficiency. The adsorption of the T1 on the mild steel surface in acid solution obeys the Langmuir adsorption isotherm

Anti-Corrosive Properties and Quantum Chemical Studies of (Benzoxazol) Derivatives on Mild Steel in HCl (1 M)

International audienceThis work is a contribution to the study about the inhibition of mild steel corrosion in a molar hydrochloric acid medium by some benzoxazol derivatives compounds. The study was carried out using gravimetric and electrochemical methods (stationary and transient). We have considered the influence of the inhibitor concentration, the temperature of the medium and the duration of the immersion of the metal sample in the aggressive medium. These studies are complemented with theoretical calculations aimed to correlate the results obtained from experimental measurements using the DFT method. The results obtained in this work through gravimetric and both transient and stationary electrochemical methods showed a satisfied coherence. Theoretical calculations also revealed a good correlation with the experimental results for our compounds

Oral Supplementation Effect of Iron and its Complex Form With Quercetin on Oxidant Status and on Redistribution of Essential Metals in Organs of Streptozotocin Diabetic Rats

International audienc

Wild-type Isogenic Standardized Hybrid (WISH)-tags for assessing population dynamics within microbiomes

Microbiomes feature recurrent compositional structures under given environmental conditions. However, these patterns may conceal diverse underlying population dynamics that are not captured when recording strain abundances using conventional amplicon sequencing and require intra-strain resolution. To approach this, we have chosen host microbiomes as an example and developed a novel genomic tagging system, termed WISH-tags that allows enumeration by both quantitative PCR and next-generation sequencing. We experimentally validated the performance of 62 tags and showed that they enable their differentiation with a dynamic range of at least five orders of magnitude with high precision and without background DNA amplification. We introduced WISH-tags into a set of model and non-model bacteria of the mouse and plant microbiota, respectively, and confirmed equal fitness of barcoded strains compared to untagged wild type strains. We then investigated intra-strain priority effects using isogenic barcoded bacteria in the murine gut and the Arabidopsis phyllosphere, both with and without microbiota context. Our findings reveal a resistance to colonization by late arriving strains of Salmonella Typhimurium in the mouse gut, whereas the phyllosphere accommodated latecomers of Sphingomonas in a proportional manner to their presence at the late inoculation timepoint. This illustrates how WISH-tags can serve as a valuable resource for deciphering the population dynamics underlying microbiome assembly, including bottlenecks, and can be applied across biological systems

Discrete equilibrium data from dynamic column breakthrough experiments

10.1021/ie3015457Industrial and Engineering Chemistry Research514514834-14844IECR