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4. CONCLUSION PAHs were determined in gas and particle-phase from June and August 2015 in Hochiminh City. PAHs concentrations in particle-phase were higher at the suburban sites compared to the 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % Sampling sites HMW MMW LMW 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%% Sampling si...

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4. CONCLUSIONS The objective of this study was investigated the diversity of diatom composition in the Red River that flows through Son Tay town, Hanoi. So far, studies on the diversity of phytoplankton in general and diatom in particular of the Red River system are still limited. The results of the study were conducted in the dry season of 201...

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4. CONCLUSION This paper reported the results of a preliminary investigation of indoor and outdoor of BTEX compounds in Hanoi residences. Our results may provide information that is useful for understanding the characteristics indoor/outdoor of BTEXs, their exposure in homes and their potential health risks. The results revealed that toluene an...

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4. CONCLUSIONS The results of this study have provided a new method for emissions gas sampling to evaluate the mutagenicity. That was direct absorption method using DMSO solvent. The method helped to collect both gas and particle phase and then absorbent can be directly introduced to Ames test without organic solvent extraction. This method is ...

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. CONCLUSIONS Deoxygenated kinetics was studied using 20 g to 60 g FOCOAR deposed in PET minienvironments. The obtained result shows that all the tests have deoxygenated approximately to the end of up to 0% which manifest a possibility to form poor oxygen minienvironments for the antioxidant preservation. The greater the amount of reducing agen...

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The SEM images show that the mild steel surface before testing is quite smooth (Fig. 4a), but the specimen in 1N HCl solution is rough and appeared like full of larger pits and cavities (Fig. 4b), while the metal surface immersed in 1N H2SO4 is general corrosion (Fig. 4c) after 1 hour immersion. According to some authors, the pitting corrosion o...

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4. CONCLUSIONS Mixed inhibition of carbon steel was achieved using the Pr(4OHCin)3 compound. Electrochemical characterization confirmed the mixed inhibition mechanism, as well as demonstrating the synergism of the two Pr3+ and 4OHCin- components of the inhibitor complex. Surface characterization combined with electrochemical results confirmed t...

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4. CONCLUSIONS Synthesis and characterization of complexes containing tetradentate N2O2 and bidentate NO-donor Schiff base ligands have been described in this paper. The spectroscopic data of the complexes give good evidence of proposed structure. The results of IR, ESI - MS, 1H-NMR, 13C-NMR, HMBC and HSQC spectroscopies indicated that the mola...

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DPV curves for detection of DA in the simultaneous presence of AA and UA are shown on Figure 6. The concentration of AA and UA was kept constant of 1mM and 0.035 mM respectively, in that time the concentration of DA was increase from 1.0 to 50.0 M. The current intensity of DA peak increases when the concentration of DA increases. These DPV curve...

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4. CONCLUSIONS This study mainly highlights the importance of corrosion problem of Cai Tau river water cooling system. The main reason leading to this phenomenon was due to the presence of chemical compositions in the Cai Tau river water such as Cl‾, SO42-, CO32- and pH. The solutions containing different ion contents, i.e. Cl‾, SO42-, CO32- an...

12 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 637 | Lượt tải: 0