A novel spherical cellulose adsorbent has been prepared by homogeneous graft polymerization of N,N＇-methylenebisacrylamide （MBA） onto cellulose in an ionic liquid, 1-N-butyl-3-methylimidazolium chloride （BMIMC1）,...A novel spherical cellulose adsorbent has been prepared by homogeneous graft polymerization of N,N＇-methylenebisacrylamide （MBA） onto cellulose in an ionic liquid, 1-N-butyl-3-methylimidazolium chloride （BMIMC1）, which was then partially amine methylated through Mannich reaction to get bifunctionalized materials containing both amide and sulphinate moities. Factors affecting the attachment of functional groups were investigated. The adsorbent was characterized by Elemental Analysis （EA）, Fourier Transform Infrared Spectroscopy （FTIR） and Scanning Electron Microscope （SEM）. Cellulose adsorbent was then tested for its potential applications in the reduction adsorption oftrichloroacetic acid （TCAA） from aqueous solutions.展开更多
Two coordinate reactions, NdCl 3·6H 2O(s) +3CCl 3COOH(s)( or TCA) =Nd(TCA) 3·3H 2O(s) +3HCl(g) +3H 2O(l) and Nd(TCA) 3·3H 2O(s) +2C 9H 7NO(s)= Nd(TCA)(C 9H 6NO) 2 (s) +2CCl 3COOH(s) +3H ...Two coordinate reactions, NdCl 3·6H 2O(s) +3CCl 3COOH(s)( or TCA) =Nd(TCA) 3·3H 2O(s) +3HCl(g) +3H 2O(l) and Nd(TCA) 3·3H 2O(s) +2C 9H 7NO(s)= Nd(TCA)(C 9H 6NO) 2 (s) +2CCl 3COOH(s) +3H 2O(l), were studied by the classical solution calorimetry at 298.15K. The molar dissolution enthalpies of the reactants and the products in certain solvent (the first reaction in 1 mol·L -1 HCl, the second in a mixed solution consisting of absolute ethyl alcohol, dimethyl sulfoxide and 4 mol·L -1 HCl ) were measured by using an isoperibol calorimeter at 298.15K . From the results and other auxiliary quantities, the standard molar formation enthalpies of [Nd(TCA) 3·3H 2O,s,298.15K] and [Nd(TCA) (C 9H 6NO) 2 ,s, 298.15K] are determined as Δ fH m °[Nd(TCA) 3·3H 2O,s,298.15K]= -3053.3 kJ·mol -1 and Δ fH m° [Nd(TCA) (C 9H 6NO) 2 ,s, 298.15K] = -1355.6 kJ·mol -1 .展开更多
We present the case of a 51-year-old moderate hemophiliac with gingival bleeding due to papillary inflammation and adherence in the molar area 47. After dental diagnosis a calculus was removed and 30% trichloroacetic ...We present the case of a 51-year-old moderate hemophiliac with gingival bleeding due to papillary inflammation and adherence in the molar area 47. After dental diagnosis a calculus was removed and 30% trichloroacetic acid was placed by a pressurized applicator for five seconds;the procedure was repeated until the bleeding stopped, then tranexamic acid was placed by a gauze. The patient chewed the gauze for 30 minutes and was discharged after repeating the same procedure for 30 minutes more. We observed how local treatment with trichloroacetic acid combined to tranexamic acid placed on the hemorrhagic site was able to stop the bleeding.展开更多
Chinese bamboo flour was chemically modified by acetylation with acetic anhydride by using trichloroacetic acid as an activation agent and the optimized condition for acetylation of bamboo flour was determined as the ...Chinese bamboo flour was chemically modified by acetylation with acetic anhydride by using trichloroacetic acid as an activation agent and the optimized condition for acetylation of bamboo flour was determined as the trichloroacetic acid amount 6.0 g per 1.5-g bamboo flour, ultrasosonication duration 40 min and the reaction time 1 h at 65℃. The composition, microstructure and thermal behavior of acetylated bamboo flour were preliminarily characterized by FT-IR, DSC and SEM etc. The acetylated bamboo flour can be molded into sheets at 130℃ and 10 MPa, indicating the modified bamboo flour possesses thermalplastic performance.展开更多
基金Supported by the Science and Technology Project of Fujian Province Educational Department(JK2013004,JA12040)Science & Technology Development Fund of Fuzhou University(2012-XY-10,2014-XQ-11)the National Natural Science Foundation of China(41372346)
文摘A novel spherical cellulose adsorbent has been prepared by homogeneous graft polymerization of N,N＇-methylenebisacrylamide （MBA） onto cellulose in an ionic liquid, 1-N-butyl-3-methylimidazolium chloride （BMIMC1）, which was then partially amine methylated through Mannich reaction to get bifunctionalized materials containing both amide and sulphinate moities. Factors affecting the attachment of functional groups were investigated. The adsorbent was characterized by Elemental Analysis （EA）, Fourier Transform Infrared Spectroscopy （FTIR） and Scanning Electron Microscope （SEM）. Cellulose adsorbent was then tested for its potential applications in the reduction adsorption oftrichloroacetic acid （TCAA） from aqueous solutions.
文摘Two coordinate reactions, NdCl 3·6H 2O(s) +3CCl 3COOH(s)( or TCA) =Nd(TCA) 3·3H 2O(s) +3HCl(g) +3H 2O(l) and Nd(TCA) 3·3H 2O(s) +2C 9H 7NO(s)= Nd(TCA)(C 9H 6NO) 2 (s) +2CCl 3COOH(s) +3H 2O(l), were studied by the classical solution calorimetry at 298.15K. The molar dissolution enthalpies of the reactants and the products in certain solvent (the first reaction in 1 mol·L -1 HCl, the second in a mixed solution consisting of absolute ethyl alcohol, dimethyl sulfoxide and 4 mol·L -1 HCl ) were measured by using an isoperibol calorimeter at 298.15K . From the results and other auxiliary quantities, the standard molar formation enthalpies of [Nd(TCA) 3·3H 2O,s,298.15K] and [Nd(TCA) (C 9H 6NO) 2 ,s, 298.15K] are determined as Δ fH m °[Nd(TCA) 3·3H 2O,s,298.15K]= -3053.3 kJ·mol -1 and Δ fH m° [Nd(TCA) (C 9H 6NO) 2 ,s, 298.15K] = -1355.6 kJ·mol -1 .
文摘We present the case of a 51-year-old moderate hemophiliac with gingival bleeding due to papillary inflammation and adherence in the molar area 47. After dental diagnosis a calculus was removed and 30% trichloroacetic acid was placed by a pressurized applicator for five seconds;the procedure was repeated until the bleeding stopped, then tranexamic acid was placed by a gauze. The patient chewed the gauze for 30 minutes and was discharged after repeating the same procedure for 30 minutes more. We observed how local treatment with trichloroacetic acid combined to tranexamic acid placed on the hemorrhagic site was able to stop the bleeding.
基金Fujian Province science and technology office (2007F5030)(in part) National Natural Scince Foundation of China (grant 50473063)
文摘Chinese bamboo flour was chemically modified by acetylation with acetic anhydride by using trichloroacetic acid as an activation agent and the optimized condition for acetylation of bamboo flour was determined as the trichloroacetic acid amount 6.0 g per 1.5-g bamboo flour, ultrasosonication duration 40 min and the reaction time 1 h at 65℃. The composition, microstructure and thermal behavior of acetylated bamboo flour were preliminarily characterized by FT-IR, DSC and SEM etc. The acetylated bamboo flour can be molded into sheets at 130℃ and 10 MPa, indicating the modified bamboo flour possesses thermalplastic performance.
