Department of Botany, University of Georgia, Athens, Georgia 30602.
Plant Physiol. 1983 May;72(1):66-70. doi: 10.1104/pp.72.1.66.
Published and additional data for polyethylene glycol 8000 (PEG), formerly PEG 6000, solution water potentials (Psi) are compared. Actual bars Psi over the concentration range of 0 to 0.8 gram PEG per gram H(2)O and temperature (T) range of 5 to 40 degrees C are best predicted (probably within +/- 5%) by this equation: Psi = 1.29PEGT - 140PEG - 4.0[PEG]. Although transformable through division by [PEG] to virial equation form, results indicate that the coefficients are not virial. Mannitol (MAN) interacts with PEG to produce Psi significantly lower than additive. Vapor pressure osmometer (VPO) data for MAN-PEG synergism compared favorably with those from thermocouple hygrometry; and VPO data showing the interactions between PEG and four salts are presented. The synergism of MAN-PEG and of NaCl-PEG are related linearly to the concentration of solute added with PEG.
对聚乙二醇 8000（PEG），以前称为 PEG 6000，溶液水势（Psi）的已发表和附加数据进行了比较。在 0 至 0.8 克 PEG 每克 H（2）O 和温度（T）范围为 5 至 40 摄氏度的浓度范围内，实际 Psi 棒最好由以下方程预测（可能在 +/- 5%）：Psi = 1.29 [PEG]（2）T - 140 [PEG]（2）- 4.0 [PEG]。尽管可以通过除以[PEG]转化为维里方程形式，但结果表明系数不是维里。甘露醇（MAN）与 PEG 相互作用会产生明显低于加和的 Psi。MAN-PEG 协同作用的蒸汽压渗透压计（VPO）数据与热电偶湿度计的数据相比表现良好；并提出了 VPO 数据，显示了 PEG 和四种盐之间的相互作用。MAN-PEG 和 NaCl-PEG 的协同作用与添加 PEG 的溶质浓度呈线性相关。
