A 21-d incubation experiment was conducted under controlled laboratory conditions to study the effects of elevated temperatures (10, 25, and 40 ℃) on some microbiological and biochemical properties in flooded paddy s...A 21-d incubation experiment was conducted under controlled laboratory conditions to study the effects of elevated temperatures (10, 25, and 40 ℃) on some microbiological and biochemical properties in flooded paddy soil amended or unamended with urea at 100 μg N g-1 soil and/or insecticide (triazophos) at field rate (FR). Enhancements in temperature led to increase the electron transport system (ETS) / dehydrogenase activity and phospholipid contents of the soil, while soil organic matter phenol and protein contents decreased with increasing temperature with or without the addition of inputs. An increase of temperature from 10 ℃ to 25 or 40 ℃ enhanced the ETS activity 2 folds (on average for all soils), while the inclusion of N and insecticide increased and decreased it, respectively, compared to the control. The soil phenol and protein contents were highly correlated with temperatures (for all soils, r = -0.936 and -0.971, respectively) and the additions of N and insecticide produced slight reductions and enhancements in them, respectively. At a particular temperature, the soil protein contents remained unaffected among all the soil treatments. An overall slight increase in phospholipid contents with N and a small decline with insecticide addition were noticed against the untreated soil. The toxicity of fertilizer and insecticide decreased as the incubation temperature increased, suggesting faster degradation of agrochemicals with raising temperature.展开更多
Investigations on the relationship between some tumor cell properties and their metastatic potential using different clones from two tumor cell lines are reported. CNE2L2(highly metastatic) and CNE2L4 (low metastatic)...Investigations on the relationship between some tumor cell properties and their metastatic potential using different clones from two tumor cell lines are reported. CNE2L2(highly metastatic) and CNE2L4 (low metastatic) clones were isolated from human nasopharyngeal carcinoma CNE-2Z cell line. LA1. LAD and LA5 clones were isolated from mouse pulmonary adenocarcinoma LA795 cell line with different metastatic potentials. The results from both cell lines showed that the metastatic potential of tumor cell positively correlated with elecirophoretic mobility rate. adhesion with endothelial cells and in vitro and in vivo invasiveness. and negatively correlated with self-adhesion and adhesion to fibroblast cells. The data further confirmed the relationship between these factors and the metastatic potential of tumor cells.The results provide a theoretical basis for elucidating the mechanism of metastasis.展开更多
基金Project (No. G1999011809) supported by the National Key Basic Research Support Foundation (NKBRSF)of China.
文摘A 21-d incubation experiment was conducted under controlled laboratory conditions to study the effects of elevated temperatures (10, 25, and 40 ℃) on some microbiological and biochemical properties in flooded paddy soil amended or unamended with urea at 100 μg N g-1 soil and/or insecticide (triazophos) at field rate (FR). Enhancements in temperature led to increase the electron transport system (ETS) / dehydrogenase activity and phospholipid contents of the soil, while soil organic matter phenol and protein contents decreased with increasing temperature with or without the addition of inputs. An increase of temperature from 10 ℃ to 25 or 40 ℃ enhanced the ETS activity 2 folds (on average for all soils), while the inclusion of N and insecticide increased and decreased it, respectively, compared to the control. The soil phenol and protein contents were highly correlated with temperatures (for all soils, r = -0.936 and -0.971, respectively) and the additions of N and insecticide produced slight reductions and enhancements in them, respectively. At a particular temperature, the soil protein contents remained unaffected among all the soil treatments. An overall slight increase in phospholipid contents with N and a small decline with insecticide addition were noticed against the untreated soil. The toxicity of fertilizer and insecticide decreased as the incubation temperature increased, suggesting faster degradation of agrochemicals with raising temperature.
文摘Investigations on the relationship between some tumor cell properties and their metastatic potential using different clones from two tumor cell lines are reported. CNE2L2(highly metastatic) and CNE2L4 (low metastatic) clones were isolated from human nasopharyngeal carcinoma CNE-2Z cell line. LA1. LAD and LA5 clones were isolated from mouse pulmonary adenocarcinoma LA795 cell line with different metastatic potentials. The results from both cell lines showed that the metastatic potential of tumor cell positively correlated with elecirophoretic mobility rate. adhesion with endothelial cells and in vitro and in vivo invasiveness. and negatively correlated with self-adhesion and adhesion to fibroblast cells. The data further confirmed the relationship between these factors and the metastatic potential of tumor cells.The results provide a theoretical basis for elucidating the mechanism of metastasis.
