采用磺基水杨酸络合物比色法研究焯煮对马齿苋中草酸的去除率,考察了不同焯煮时间和不同用水量对马齿苋草酸含量的影响情况。结果表明,马齿苋100 g,用水量500 m L,焯煮时间3 min,草酸去除率达50%以上。此外,还研究了不同采收期马齿苋中...采用磺基水杨酸络合物比色法研究焯煮对马齿苋中草酸的去除率,考察了不同焯煮时间和不同用水量对马齿苋草酸含量的影响情况。结果表明,马齿苋100 g,用水量500 m L,焯煮时间3 min,草酸去除率达50%以上。此外,还研究了不同采收期马齿苋中草酸含量的差异,表明花蕾期采摘最合适,为合理食用马齿苋提供参考依据。展开更多
Starting with y-butyrolactone, 4-amino-3-（3-hydroxypropyl）-1H-1,2,4-triazole-5-（4H） thione 1 was prepared, and cyclization of it with 4-phenylbromoacetophenone gave 6-（4-biphenylyl）- 3-（3-hydroxypropyl）-7H-1,2...Starting with y-butyrolactone, 4-amino-3-（3-hydroxypropyl）-1H-1,2,4-triazole-5-（4H） thione 1 was prepared, and cyclization of it with 4-phenylbromoacetophenone gave 6-（4-biphenylyl）- 3-（3-hydroxypropyl）-7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazine Ⅱ. The structures of Ⅰ and Ⅱ were determined by elemental analyses, IR, ^1H NMR, ^13C NMR, and X-ray diffraction. Crystal data for 1： C5H10N4OS, Mr = 174.23, monoclinic system, space group P21/c, a =8.4568（6）, b = 22.8905（16）, c = 9.2625（6） A, β= 114.172（1）°, V= 1635.82（19） A^3, F（000） = 736, Z= 8, Dc = 1.415 g/cm^3, 2 λ=0.71073 A,μ = 0.346 mm^-1 and the final R = 0.0603 for 2870 unique reflections with 1993 observed ones （I 〉 2σ（I）. Crystal data for Ⅱ： C19H18N4OS, Mr = 350.43, monoclinic system, space group P21/c, a = 6.7481（7）, b = 8.2647（8）, c = 30.075（3） A, β= 94.445（2）°, V= 1672.3（3） A3, F（000） = 736, Z = 4, Dc = 1.392 g/cm^3, λ=0.71073 A,μ= 0.209 mm^-1 and the final R = 0.0667 for 3000 unique reflections with 2534 observed ones （I 〉 2σ（I））. In the crystal of compound Ⅱ, the five-membered triazole ring and two benzene rings are coplanar, while the six-membered thiadiazine ring is slightly distorted, with an r.m.s deviation of 0.227（1） A. Some hydrogen bonding interactions are observed and π-π stacking interactions between adjacent molecules are found in the packing diagrams of the two compounds.展开更多
文摘采用磺基水杨酸络合物比色法研究焯煮对马齿苋中草酸的去除率,考察了不同焯煮时间和不同用水量对马齿苋草酸含量的影响情况。结果表明,马齿苋100 g,用水量500 m L,焯煮时间3 min,草酸去除率达50%以上。此外,还研究了不同采收期马齿苋中草酸含量的差异,表明花蕾期采摘最合适,为合理食用马齿苋提供参考依据。
基金This work was supported by the Natural Science Foundation of Zhejiang Province (No. M203149)
文摘Starting with y-butyrolactone, 4-amino-3-（3-hydroxypropyl）-1H-1,2,4-triazole-5-（4H） thione 1 was prepared, and cyclization of it with 4-phenylbromoacetophenone gave 6-（4-biphenylyl）- 3-（3-hydroxypropyl）-7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazine Ⅱ. The structures of Ⅰ and Ⅱ were determined by elemental analyses, IR, ^1H NMR, ^13C NMR, and X-ray diffraction. Crystal data for 1： C5H10N4OS, Mr = 174.23, monoclinic system, space group P21/c, a =8.4568（6）, b = 22.8905（16）, c = 9.2625（6） A, β= 114.172（1）°, V= 1635.82（19） A^3, F（000） = 736, Z= 8, Dc = 1.415 g/cm^3, 2 λ=0.71073 A,μ = 0.346 mm^-1 and the final R = 0.0603 for 2870 unique reflections with 1993 observed ones （I 〉 2σ（I）. Crystal data for Ⅱ： C19H18N4OS, Mr = 350.43, monoclinic system, space group P21/c, a = 6.7481（7）, b = 8.2647（8）, c = 30.075（3） A, β= 94.445（2）°, V= 1672.3（3） A3, F（000） = 736, Z = 4, Dc = 1.392 g/cm^3, λ=0.71073 A,μ= 0.209 mm^-1 and the final R = 0.0667 for 3000 unique reflections with 2534 observed ones （I 〉 2σ（I））. In the crystal of compound Ⅱ, the five-membered triazole ring and two benzene rings are coplanar, while the six-membered thiadiazine ring is slightly distorted, with an r.m.s deviation of 0.227（1） A. Some hydrogen bonding interactions are observed and π-π stacking interactions between adjacent molecules are found in the packing diagrams of the two compounds.
