采用UASB处理以甲醇为有机溶剂的对乙酰氨基苯璜酰氯(p-ASC)生产废水。通过逐步减少HRT,考察有机负荷(OLR)从2.0 g COD/(L·d)逐步提高到24.0 g COD/(L·d)过程中反应器处理效果的变化。结果表明,在最优的OLR 7.0 g COD/(L·...采用UASB处理以甲醇为有机溶剂的对乙酰氨基苯璜酰氯(p-ASC)生产废水。通过逐步减少HRT,考察有机负荷(OLR)从2.0 g COD/(L·d)逐步提高到24.0 g COD/(L·d)过程中反应器处理效果的变化。结果表明,在最优的OLR 7.0 g COD/(L·d)的条件下,p-ASC和COD的去除率分别能达到76%和100%。虽然进水没有硫酸盐,但是出水却有硫化物和硫酸盐的产生。进一步保持最优的OLR条件下的HRT(0.45 d)不变,逐步增加进水p-ASC浓度到1 100 mg/L,产甲烷菌没有发现受到抑制。持续增加进水硫酸盐浓度到3 000 mg/L,发现硫酸盐还原菌没有受到抑制,但是产甲烷菌却受到抑制,最后减少硫酸盐浓度到1 000 mg/L,厌氧系统在1周后几乎完全恢复。展开更多
Betulinic acid, a triterpenoid found in many plant species, has attracted attention due to its important pharmacological properties, such as anti-cancer and anti-HIV activities. In order to obtain derivatives potentia...Betulinic acid, a triterpenoid found in many plant species, has attracted attention due to its important pharmacological properties, such as anti-cancer and anti-HIV activities. In order to obtain derivatives potentially useful for detailed pharmacological studies, betulinic acid derivatives were synthesized by reaction of betulinic acid with benzoyl chloride and with acetic anhydride using lipase as catalyst. Enzyme-catalyzed of betulinic acid with benzoyl chloride converted betulinic acid into 3β-benzoil-lup-20（29）-ene-28-oic acid ester （BCL） whereas with acetic anhydride converted betulinic acid into 3β-acetoxy-lup-20（29）-ene-28-oic acid ester （BAA）. The BAA then underwent further reaction with l-decanol to produce 3β-acetoxy-lup-20（29）-ene-28 decanoate （BAAD）. Betulinic acid derivatives prepared were tested for cytotoxic activity on three cancer cell lines in vitro： all tested compounds showed stronger cytotoxic activity than betulinic acid,展开更多
The crystal and molecular structure of diethyl l-(p-toluenesulfon-amido ) - p chlofoPhenylmet hylphosphonate has been determined by X- ray d iffractionmethod- The crystal (C18,H23,ClNO5PS) is monoclinic with space gro...The crystal and molecular structure of diethyl l-(p-toluenesulfon-amido ) - p chlofoPhenylmet hylphosphonate has been determined by X- ray d iffractionmethod- The crystal (C18,H23,ClNO5PS) is monoclinic with space group P21/c, a =8. 162(6), b= l8. O64(7), c= l4. 362(4) A, β=96. 29(3)°, V=2lO4. 7 A3, M.=431, 88, Z=4, Dx= l. 364 g/cm3, μ, = 3. 765 cm-1, F(000) = 904, R=0. 047 andRw=0. 0049 for 998 reflections with I>3σ(I). The 1H NMR spetrum of the title com-pound shows that the two ethoxy groups are magnetic nonequivalent, which is in agree-ment with its X-ray analysis result-展开更多
Various polysulfonamide （PSA） statistical copolymers were synthesized by polycondensation of three aromatic diamines and terephthaloyl chloride. The inherent viscosities of the resulting PSA copolymers range from 1....Various polysulfonamide （PSA） statistical copolymers were synthesized by polycondensation of three aromatic diamines and terephthaloyl chloride. The inherent viscosities of the resulting PSA copolymers range from 1.54 to 1.66 dL/g. The precipitated PSA copolymers with feed content of p-phenylene diamine （PPD） being less than 50% （mole fraction） can be redissolved in N-methyl-2-pryrrolidone （NMP） or N, N-dimethylacetamide （DMAc） with lithium chloride of WLiC1 ： 0.02. All of the PSA copolymers exhibit enhanced tensile strength in comparison with PSA and still maintain excellent thermal stability in either air or nitrogen atmosphere展开更多
文摘采用UASB处理以甲醇为有机溶剂的对乙酰氨基苯璜酰氯(p-ASC)生产废水。通过逐步减少HRT,考察有机负荷(OLR)从2.0 g COD/(L·d)逐步提高到24.0 g COD/(L·d)过程中反应器处理效果的变化。结果表明,在最优的OLR 7.0 g COD/(L·d)的条件下,p-ASC和COD的去除率分别能达到76%和100%。虽然进水没有硫酸盐,但是出水却有硫化物和硫酸盐的产生。进一步保持最优的OLR条件下的HRT(0.45 d)不变,逐步增加进水p-ASC浓度到1 100 mg/L,产甲烷菌没有发现受到抑制。持续增加进水硫酸盐浓度到3 000 mg/L,发现硫酸盐还原菌没有受到抑制,但是产甲烷菌却受到抑制,最后减少硫酸盐浓度到1 000 mg/L,厌氧系统在1周后几乎完全恢复。
文摘Betulinic acid, a triterpenoid found in many plant species, has attracted attention due to its important pharmacological properties, such as anti-cancer and anti-HIV activities. In order to obtain derivatives potentially useful for detailed pharmacological studies, betulinic acid derivatives were synthesized by reaction of betulinic acid with benzoyl chloride and with acetic anhydride using lipase as catalyst. Enzyme-catalyzed of betulinic acid with benzoyl chloride converted betulinic acid into 3β-benzoil-lup-20（29）-ene-28-oic acid ester （BCL） whereas with acetic anhydride converted betulinic acid into 3β-acetoxy-lup-20（29）-ene-28-oic acid ester （BAA）. The BAA then underwent further reaction with l-decanol to produce 3β-acetoxy-lup-20（29）-ene-28 decanoate （BAAD）. Betulinic acid derivatives prepared were tested for cytotoxic activity on three cancer cell lines in vitro： all tested compounds showed stronger cytotoxic activity than betulinic acid,
文摘The crystal and molecular structure of diethyl l-(p-toluenesulfon-amido ) - p chlofoPhenylmet hylphosphonate has been determined by X- ray d iffractionmethod- The crystal (C18,H23,ClNO5PS) is monoclinic with space group P21/c, a =8. 162(6), b= l8. O64(7), c= l4. 362(4) A, β=96. 29(3)°, V=2lO4. 7 A3, M.=431, 88, Z=4, Dx= l. 364 g/cm3, μ, = 3. 765 cm-1, F(000) = 904, R=0. 047 andRw=0. 0049 for 998 reflections with I>3σ(I). The 1H NMR spetrum of the title com-pound shows that the two ethoxy groups are magnetic nonequivalent, which is in agree-ment with its X-ray analysis result-
基金the National Natural Science Foundation of China (No. 50973059)the Scientific Research Foundation of 2009 Graduate School of Shanghai University
文摘Various polysulfonamide （PSA） statistical copolymers were synthesized by polycondensation of three aromatic diamines and terephthaloyl chloride. The inherent viscosities of the resulting PSA copolymers range from 1.54 to 1.66 dL/g. The precipitated PSA copolymers with feed content of p-phenylene diamine （PPD） being less than 50% （mole fraction） can be redissolved in N-methyl-2-pryrrolidone （NMP） or N, N-dimethylacetamide （DMAc） with lithium chloride of WLiC1 ： 0.02. All of the PSA copolymers exhibit enhanced tensile strength in comparison with PSA and still maintain excellent thermal stability in either air or nitrogen atmosphere
