评估聚乙二醇 8000 溶液在无其他溶质和有其他溶质存在时的水势。
Evaluation of the water potentials of solutions of polyethylene glycol 8000 both in the absence and presence of other solutes.
机构信息
Department of Botany, University of Georgia, Athens, Georgia 30602.
出版信息
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。
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