Assessment of the roof - Harvested rainwater quality in some suburb districts, Ha Noi, Viet Nam - Nguyen Thi Ha4. CONCLUSIONS In the studied districts, rainwater was harvested from different types of roof including tile, concrete, fibro cement and metal roofing, of which tile roof is the most common one, counted for 65.6 %. The quality of roof harvested rainwater that was already separated 5-15 minute first rain then stored in the tank was rather good w...
6 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 453 | Lượt tải: 0
Inhibitory effect of different eupatoriumfortunei turcz extracts on the growth of microcystis aeruginosa - Pham Thanh Nga4. CONCLUSION The present work indicated that the ethanol extract of Eupatorium fortunei Turcz at 500 µg/mL with inhibition efficiency of 95.5 % showed higher potential ability to inhibit the growth of M.aeruginosa than those of the water and methanol extracts with inhibitionefficiencyof 59.7 % and 66.5 %, respectively. In addition, pH level of...
6 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 436 | Lượt tải: 0
Gas–particle partitioning of polycyclic aromatic hydrocarbons - Pahs in ambient air in hochiminh city - Nguyen Doan Thien Ch4. 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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Diatom composition in the red river near Son Tay, Ha Noi - Hoang Thi Thu Hang4. 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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Preliminary assessment of btex concentrations indoor and outdoor air in residential homes in Hanoi, Vietnam - Vo Thi Le Ha4. 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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Gas emissions and mutagenic effects of diesel and biodiesel fuels - Phan Quang Thang4. 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 ...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 447 | Lượt tải: 0
A study on the kinetics of oxygen reduction focoar - Le Quoc Khanh. 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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Effect of anion groups on corrosion inhibition behaviours of VietNam orange peel essential oil for mild steel in the acidic media - Bui Thi Thanh HuyenThe 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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A study on praseodymium 4 - Hydroxycinnamate as an inhibitor for carbon steel in fresh cooling water system of ca mau fertilizer plant4. 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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Synthesis and structural characterization of Palladium(II) complexes with tetradentate N2O2 and bidentate no-Donor salicylaldehyde schiff base ligands - Lam Quang Hai4. 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...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 462 | Lượt tải: 0
