4,4-diethoxy-2-benzyl-3-oxo-butyric acid ethyl ester | 827606-47-3

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 酮酸及其衍生物
• 英文名称: 4,4-diethoxy-2-benzyl-3-oxo-butyric acid ethyl ester
• 英文别名: γ.γ-Diaethoxy-α-benzyl-acetessigsaeureaethylester；4,4-Diaethoxy-2-benzyl-3-oxo-buttersaeure-aethylester
• CAS: 827606-47-3
• 化学式: C₁₇H₂₄O₅
• 分子量: 308.375
• InChiKey: PWNXVFFPPFZIPE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.38
• 重原子数：
  22.0
• 可旋转键数：
  10.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.53
• 拓扑面积：
  61.83
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  4,4-diethoxy-2-benzyl-3-oxo-butyric acid ethyl ester 在 氢氧化钾 、 sodium hydroxide 、 硫酸 作用下， 生成 2-羟基-4-苯基丁酸
  参考文献：
  名称：

  Density and Water Exchange-Dependent Growth and Survival of Litopenaeus setiferus Postlarvae

  摘要：

  AbstractThis present study was designed to investigate the effects of stocking density and water exchange on the growth rate, survival and performance index of L. setiferus postlarvae under controlled laboratory conditions. The experiment was done with postlarvae (PL10 to PL40) at densities of 50, 150, 250 and 350 shrimp/m2 and various different water exchanges rate per day (0, 6, 12 and 18%). The maximum growth rate was obtained for shrimp with 12% water exchange per day at all densities. A reduction of the maximum growth rate was observed in relation to density with the highest values in shrimp stocked in a density of 50 and 150 shrimp/m2 (mean value of 0.53 mg/d) and the lowest in shrimp stocked in a density of 350 shrimp/m2 (0.24 mg/d). The multiple regression equation obtained to relate performance index (growth rate* survival : PI), shrimp density (X1) and water exchange (X2) was: PI = 0.31 + (0.001) X1+ 0.039 X2+ 2.28 × 10−6 X12+ (−0.0017) X22+ (0.000026)X1X2,R2= 0.78; P > 0.03. According to this equation the optimum shrimp density‐water exchange comhination was between 5 to 12% of water exchange at stocking density of between 50 and 150 shrimp/m2. Salinity, ammonia‐N and nitrite‐N increased according to the time spent in tanks without water exchange. With no (0%) water exchange, water quality parameters measured were outside the optimum for L. setiferus postlarvae. The use of optimum density and water exchange in a nursery system for L. setiferus with optimum variables established is proposed.

  DOI：

  10.1111/j.1749-7345.2001.tb01091.x
• 作为产物：
  描述：

  2,2-二乙氧基乙酸乙酯 在 乙醇 、 sodium ethanolate 、 sodium 作用下， 生成 4,4-diethoxy-2-benzyl-3-oxo-butyric acid ethyl ester
  参考文献：
  名称：

  Density and Water Exchange-Dependent Growth and Survival of Litopenaeus setiferus Postlarvae

  摘要：

  AbstractThis present study was designed to investigate the effects of stocking density and water exchange on the growth rate, survival and performance index of L. setiferus postlarvae under controlled laboratory conditions. The experiment was done with postlarvae (PL10 to PL40) at densities of 50, 150, 250 and 350 shrimp/m2 and various different water exchanges rate per day (0, 6, 12 and 18%). The maximum growth rate was obtained for shrimp with 12% water exchange per day at all densities. A reduction of the maximum growth rate was observed in relation to density with the highest values in shrimp stocked in a density of 50 and 150 shrimp/m2 (mean value of 0.53 mg/d) and the lowest in shrimp stocked in a density of 350 shrimp/m2 (0.24 mg/d). The multiple regression equation obtained to relate performance index (growth rate* survival : PI), shrimp density (X1) and water exchange (X2) was: PI = 0.31 + (0.001) X1+ 0.039 X2+ 2.28 × 10−6 X12+ (−0.0017) X22+ (0.000026)X1X2,R2= 0.78; P > 0.03. According to this equation the optimum shrimp density‐water exchange comhination was between 5 to 12% of water exchange at stocking density of between 50 and 150 shrimp/m2. Salinity, ammonia‐N and nitrite‐N increased according to the time spent in tanks without water exchange. With no (0%) water exchange, water quality parameters measured were outside the optimum for L. setiferus postlarvae. The use of optimum density and water exchange in a nursery system for L. setiferus with optimum variables established is proposed.

  DOI：

  10.1111/j.1749-7345.2001.tb01091.x