Tài liệu, ebook

Preliminary assessment of btex concentrations indoor and outdoor air in residential homes in Hanoi, Vietnam - Vo Thi Le Ha
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...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 788 | Lượt tải: 1
Gas emissions and mutagenic effects of diesel and biodiesel fuels - Phan Quang Thang
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 ...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 765 | Lượt tải: 1
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...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 974 | Lượt tải: 1
Effect of anion groups on corrosion inhibition behaviours of VietNam orange peel essential oil for mild steel in the acidic media - Bui Thi Thanh Huyen
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...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 745 | Lượt tải: 1
A study on praseodymium 4 - Hydroxycinnamate as an inhibitor for carbon steel in fresh cooling water system of ca mau fertilizer plant
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...
9 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 861 | Lượt tải: 1
Synthesis and structural characterization of Palladium(II) complexes with tetradentate N2O2 and bidentate no-Donor salicylaldehyde schiff base ligands - Lam Quang Hai
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...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 757 | Lượt tải: 1
Simultaneous determination of dopamine in the presence of ascorbic acid and Uric Acid by electrochemically oxidized screen printed carbon electrode - Nguyen Xuan Viet
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...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 917 | Lượt tải: 1
Corrosion characterizations of carbon steel in cai tau river water system - Viet Nam
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: 863 | Lượt tải: 1
Protection of steel JISG 3141 with chromium-Free conversion coating based on inorganic salt (Zr/Ti/Mo) - Duong Thi Hong Phan
4. CONCLUSION The SPCC-JISG 3141 was treated successfully by Zr/Ti/Mo- based conversion coating. The surface morphology and composition of Zr/Ti/Mo-treated samples were studied. Results obtained from SEM/EDS revealed that Zr/Ti/MoCC formed did not uniformly cover the surface of steels. Moreover, the adhesion and corrosion protection properties ...
9 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 881 | Lượt tải: 1
Bài giảng Hóa học - Chương 13: Nhóm VIIb
Anhidrit perenic Re2O7 là chất rắn màu vàng, rất bền, không phân hủy khi nóng chảy và bay hơi, tác dụng với nước tạo axit perenic HReO4 Muối perenat không màu, bền hơn muối pemanganat. KReO4 bay hơi trên 1000 oC không bị phân hủy  tính chất OXH của ReO4- rất yếu
31 trang | Chia sẻ: yendt2356 | Ngày: 28/11/2020 | Lượt xem: 1442 | Lượt tải: 1

Thư viện tài liệu, ebook tổng hợp lớn nhất Việt Nam