|
|
char = D;code = 68
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char = l;code = 108
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result sql = Dissolution of microcrystalline cellulose in phosphoric acid--molecular changes and kinetics.
Dissolution of microcrystalline cellulose in phosphoric acid--molecular changes and kinetics.char = I;code = 73
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char = C;code = 67
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char = s;code = 115
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char = i;code = 105
char = n;code = 110
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char = (;code = 40
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char = M;code = 77
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char = ,;code = 44
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result sql = In this study, we aimed to dissolve microcrystalline cellulose (MCC) with phosphoric acid to obtain high-quality fermentable saccharides. MCC was directly dissolved in phosphoric acid (the concentration was 83%) for 10 hours at temperatures of 30, 50, and 70 degrees C. The structural changes of MCC were determined in detail with X-ray powder diffraction, solid-state cross-polarization magic angle spinning (13)C-NMR, and X-ray photoelectron spectroscopy. The kinetics of MCC decrystallization during treatment with phosphoric acid was also compared at 30, 50, and 70 degrees C. With the assumption of first order kinetics, the Arrhenius parameters of K, A(0) and E(a) were calculated. The rate constants of decrystallization reaction (K) were 0.06, 0.17, and 0.12 h(-1) respectively. The pre-exponential factor (A(0)) was 1.2 x 10(6) h(-1), and the activation energy (E(a)) was 42.4 kJ/mol.
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char = n;code = 110
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = m;code = 109
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char = o;code = 111
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char = l;code = 108
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char = u;code = 117
char = l;code = 108
char = o;code = 111
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char = ;code = 32
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char = o;code = 111
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char = h;code = 104
char = o;code = 111
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result sql = Dissolution of microcrystalline cellulose in phosphoric acid--molecular changes and kinetics.
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result sql = In this study, we aimed to dissolve microcrystalline cellulose (MCC) with phosphoric acid to obtain high-quality fermentable saccharides. MCC was directly dissolved in phosphoric acid (the concentration was 83%) for 10 hours at temperatures of 30, 50, and 70 degrees C. The structural changes of MCC were determined in detail with X-ray powder diffraction, solid-state cross-polarization magic angle spinning (13)C-NMR, and X-ray photoelectron spectroscopy. The kinetics of MCC decrystallization during treatment with phosphoric acid was also compared at 30, 50, and 70 degrees C. With the assumption of first order kinetics, the Arrhenius parameters of K, A(0) and E(a) were calculated. The rate constants of decrystallization reaction (K) were 0.06, 0.17, and 0.12 h(-1) respectively. The pre-exponential factor (A(0)) was 1.2 x 10(6) h(-1), and the activation energy (E(a)) was 42.4 kJ/mol.
Publication: Molecules 2009 ;14(12)::5027-41. :doi: 10.3390/molecules14125027.
Publication Date: 2009
Study Author(s): Zhang, Junhua;Zhang, Jingqiang;Lin, Lu;Chen, Tianming;Zhang, Jun;Liu, Shijie;Li, Zhenjiang;Ouyang, Pingkai;
Institution: Department of Resources Science and Engineering, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong Province, China.
Shortcut link to this study:
Publication Date: 2009
Study Author(s): Zhang, Junhua;Zhang, Jingqiang;Lin, Lu;Chen, Tianming;Zhang, Jun;Liu, Shijie;Li, Zhenjiang;Ouyang, Pingkai;
Institution: Department of Resources Science and Engineering, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong Province, China.
Shortcut link to this study:
In this study, we aimed to dissolve microcrystalline cellulose (MCC) with phosphoric acid to obtain high-quality fermentable saccharides. MCC was directly dissolved in phosphoric acid (the concentration was 83%) for 10 hours at temperatures of 30, 50, and 70 degrees C. The structural changes of MCC were determined in detail with X-ray powder diffraction, solid-state cross-polarization magic angle spinning (13)C-NMR, and X-ray photoelectron spectroscopy. The kinetics of MCC decrystallization during treatment with phosphoric acid was also compared at 30, 50, and 70 degrees C. With the assumption of first order kinetics, the Arrhenius parameters of K, A(0) and E(a) were calculated. The rate constants of decrystallization reaction (K) were 0.06, 0.17, and 0.12 h(-1) respectively. The pre-exponential factor (A(0)) was 1.2 x 10(6) h(-1), and the activation energy (E(a)) was 42.4 kJ/mol.
PMID: 20032875
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