Laoying Tea as a famous traditional drinking tea is used in southern China. In Guizhou, Litsea coreana Lévl. var. lanuginose (Migo) Yang et P. H. Huang and Actinodaphne cupularis (Hemsl.) Gamble are used as its o...Laoying Tea as a famous traditional drinking tea is used in southern China. In Guizhou, Litsea coreana Lévl. var. lanuginose (Migo) Yang et P. H. Huang and Actinodaphne cupularis (Hemsl.) Gamble are used as its original materials. Comparing with the green tea the chemical compositions and contents of leaves in two original species of Laoying Tea, which were proteins, amino acids, vitamins, sugar, polyphenol, flavonoid et al, had been analyzed, no detectable amount of caffeine was found, nutrient constituents were plentiful.展开更多
Linear sweep voltammetry has been used to study the electrochemical behavior of tran-sition metal structural units Co(PPh3)2Cl2 and Co(PPh3)3Cl in DMF solution with 0.1mol L-1Et4NClO4 on Pt electrode. The results sugg...Linear sweep voltammetry has been used to study the electrochemical behavior of tran-sition metal structural units Co(PPh3)2Cl2 and Co(PPh3)3Cl in DMF solution with 0.1mol L-1Et4NClO4 on Pt electrode. The results suggest that Co(Ⅱ) is reduced to Co(Ⅰ) at the first stepand the process is reversible. The Process of Co(Ⅰ) reduced to Co(0) subsequently is irreversible.The Co(Ⅰ) is not stable in solution and is oxidized easily to Co(Ⅱ).展开更多
文摘Laoying Tea as a famous traditional drinking tea is used in southern China. In Guizhou, Litsea coreana Lévl. var. lanuginose (Migo) Yang et P. H. Huang and Actinodaphne cupularis (Hemsl.) Gamble are used as its original materials. Comparing with the green tea the chemical compositions and contents of leaves in two original species of Laoying Tea, which were proteins, amino acids, vitamins, sugar, polyphenol, flavonoid et al, had been analyzed, no detectable amount of caffeine was found, nutrient constituents were plentiful.
文摘Linear sweep voltammetry has been used to study the electrochemical behavior of tran-sition metal structural units Co(PPh3)2Cl2 and Co(PPh3)3Cl in DMF solution with 0.1mol L-1Et4NClO4 on Pt electrode. The results suggest that Co(Ⅱ) is reduced to Co(Ⅰ) at the first stepand the process is reversible. The Process of Co(Ⅰ) reduced to Co(0) subsequently is irreversible.The Co(Ⅰ) is not stable in solution and is oxidized easily to Co(Ⅱ).
