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Bài giảng hóa học - Chương 16: Nhóm IIb
Hg+ tồn tại dưới dạng ion Hg22+ (Hg-Hg): Đo tính chất từ hợp chất Hg(I) đều nghịch từ, trong khi Hg+ còn 1e độc thân. Đo XRD trong hợp chất Hg(I) liên kết Hg-Hg có độ dài biến đổi từ 2.43 đến 2.69 tùy thuộc anion. Đo độ dẫn điện dung dịch nitrat Hg(I) cho thấy trong dung dịch tồn tại Hg2(NO3)2 chứ không có monome HgNO3. Đa số muối Hg(I) ít t...
22 trang | Chia sẻ: yendt2356 | Ngày: 28/11/2020 | Lượt xem: 899 | Lượt tải: 0
Bài giảng hóa học - Chương 15: Nhóm Ib
Ion Ag+ có tính chất OXH, kìm hãm sự phát triển của sinh vật ở nồng độ nhỏ 10-10 M. Ion Ag+ dễ bị KH bởi chất khử yếu andehit, gluco: Phản ứng dùng gluco khử muối Ag trong amoniac dùng để tráng gương, phích trong công nghiệp
27 trang | Chia sẻ: yendt2356 | Ngày: 28/11/2020 | Lượt xem: 856 | Lượt tải: 0
Fraction and determination of capsaicinoids from red pepper fruits with insecticidal activity against mealworm, Tenebrio molitor, and superworm, Zophobas morio - Ngai Thi Ngo
4. CONCLUSION MeOHextract, HEXand DCM layers of the fruits of C. annuum were evaluated for their insecticidal activity against T. molitor and Z. morio. A mixture of capsaicin and dihydrocapsaicin (1: 0.9) was isolated from the DCM layer of the fruits of C. annuum using column chromatography and chemical structur es were identified using ESI-MS ...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 823 | Lượt tải: 0
Using the respiratory quotient as a microbial indicator to monitor soil biodegradation - Tran Thanh Chi
4. CONCLUSIONS A clear relationship was observed between RQ evolution, microbial activity and contaminant depletion. The lowest RQs were correlated to the highest hexadecane depletion rate and were obtained for the sample “HNP” (corresponding to the C:N:P ratio of 100:10:1). This results show that it could be possible to monitor the contaminant...
6 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 783 | Lượt tải: 0
Research on the ability of handling ammonia contaminated air stream by activated carbon materials from coconut fiber (AC-1) and peanut husk (AC-2), impregnated with ZnCl2 - Nguyen Thi Kim Anh
4. CONCLUSION The model of ammonia removal by adsorption with 3 materials: Activated carbon made from coconut fiber (AC-1), peanut husk (AC-2) and commercial activated carbon (AC-3) showed its high performance (over 80 %). In particular, AC-2 gave higher performance andResearch on the ability of handling ammonia contaminated air stream by activa...
6 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 748 | Lượt tải: 0
Occurrence of pahs in the atmosphere and incense burning area in Ha Noi associated with health risk assessment - Van Dieu Anh
4. CONCLUSIONS The concentration of PAHs in incense burning area were 3 - 7 time higher than those in ambient air in Ha Noi. In both sites, toxic PAHs were the dominant compounds among the detected PAHs. Carcinogenic PAHs accounted for 80 % of total PAHs in incense burning area. The estimated ILTCR indicated that high potential carcinogenic ris...
5 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 751 | Lượt tải: 0
Removal of Cd(II) from aqueous solutions by crumpled graphite oxide - Ha Xuan Son
4. CONCLUSION Crumpled graphite oxides were effectively utilized as an effective low-cost adsorbent for the removal of Cd(II) via adsorption from aqueous solution. The SEM pictures show that the CGO possesses a crumpled morphology. The adsorption of Cd(II) followed the Langmuir adsorption model with the maximum adsorption capacity of 40.82 mg/g...
6 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 665 | Lượt tải: 0
Thermal decomposition and Shelf-Life of petn and pbx based on petn using thermal methods - Nguyen Trung Toan
4. CONCLUSIONS Thermal behavior and decomposition kinetics of the PBXs with various binder contents were evaluated in comparison with the pure PETN. The experimental results demonstrate that the introduced binder (plasticised NC) accelerated the thermal decomposition process of PBXs, resulting in reductions in their decomposition temperatures a...
9 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 793 | Lượt tải: 0
Optimization of ultrasonic extraction for determination of 16 polycyclic aromatic hydrocarbons in air particle - Hanh Thi Duong
4. CONCLUSIONS The ultrasonic extraction procedure for determination of 16 typical polycyclic aromatic hydrocarbons (PAHs) in air particles was optimized. This method is quick, simple and costeffective. The extraction steps were minimized therefore it avoids contamination. Moreover, the method produced the high recovery rates for 16 PAHs with go...
11 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 707 | Lượt tải: 0
Investigation of cerium (III) activated-Ceria Nanoparticles as corrosion inhibitors for carbon steel
. CONCLUSIONS This work focused to investigate the corrosion protection performance of cerium salt activated-cerium(IV) oxide nanoparticles in NaCl solution and in organic coating by comparative study with CeO2 nanoparticles and Ce(NO3)3. The size of CeO2 nanoparticles obtained about 11 nm by homogeneous precipitation technique. In a 0.1 M NaCl...
9 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 796 | Lượt tải: 0

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