Brasfeild H
Appl Microbiol. 1972 Sep;24(3):349-52. doi: 10.1128/am.24.3.349-352.1972.
Samples of water were taken from a polluted zone of the Gallinas River and analyzed as to numbers of total bacteria, coliforms, and fecal streptococci. Environmental factors measured were temperature, pH and concentrations of detergent, nitrate plus nitrite nitrogen, sulfate, chloride, bicarbonate, and phosphate. Thirty-two observations were made from 12 March through 22 July 1971. Stepwise multiple linear regression analyses of the data were carried out by computer to determine which of the environmental factors were significantly correlated with numbers of bacteria present. A multiple linear regression equation was constructed for each bacteriological parameter as a function of significant variables only. Log total bacteria was correlated positively with bicarbonate, phosphate, and detergent concentrations. Log coliforms was correlated positively with phosphate and sulfate concentrations and negatively with chloride concentration. Log fecal streptococci was correlated positively with bicarbonate and chloride concentrations.
从加林纳斯河的污染区域采集水样，并对其中的总细菌、大肠菌群和粪链球菌数量进行分析。所测量的环境因素包括温度、pH值以及洗涤剂、硝酸盐加亚硝酸盐氮、硫酸盐、氯化物、碳酸氢盐和磷酸盐的浓度。在1971年3月12日至7月22日期间进行了32次观测。通过计算机对数据进行逐步多元线性回归分析，以确定哪些环境因素与所存在的细菌数量显著相关。仅针对显著变量，为每个细菌学参数构建了一个多元线性回归方程。总细菌对数与碳酸氢盐、磷酸盐和洗涤剂浓度呈正相关。大肠菌群对数与磷酸盐和硫酸盐浓度呈正相关，与氯化物浓度呈负相关。粪链球菌对数与碳酸氢盐和氯化物浓度呈正相关。
