Advances in the bioaugmentation-assisted remediation of petroleum contaminated soil / 生物工程学报

Bioremediation is considered as a cost-effective, efficient and free-of-secondary-pollution technology for petroleum pollution remediation. Due to the limitation of soil environmental conditions and the nature of petroleum pollutants, the insufficient number and the low growth rate of indigenous petroleum-degrading microorganisms in soil lead to long remediation cycle and poor remediation efficiency. Bioaugmentation can effectively improve the biodegradation efficiency. By supplying functional microbes or microbial consortia, immobilized microbes, surfactants and growth substrates, the remediation effect of indigenous microorganisms on petroleum pollutants in soil can be boosted. This article summarizes the reported petroleum-degrading microbes and the main factors influencing microbial remediation of petroleum contaminated soil. Moreover, this article discusses a variety of effective strategies to enhance the bioremediation efficiency, as well as future directions of bioaugmentation strategies.

Efficacy of treadmill training on neuropsychiatric symptoms and quality of life among elderly Alzheimer's disease / 中国实用护理杂志

Objective@#To analyze effect of Treadmill Training on neuropsychiatric symptoms and quality of life in elderly patients with Alzheimer′s disease.@*Methods@#From May 2018 to November 2018, the experimental design was adopted. The patients with 55-75 years old AD, the First Affiliated Hospital of Quanzhou Fujian Medical University were randomly divided into groups. Group (treadmill training, 68 patients), control group (no intervention, 68 patients). The two groups were evaluated before the training and 20 weeks after training, using the Neuropsychology Scale (NPI-Q) and the Alzheimer's disease Quality of Life Questionnaire (QOL-AD), and the t-test, two-factor repeated measures analysis of variance, etc. Statistical methods for data analysis.@*Results@#There were no significant differences in neuropsychiatric scores and QOL scores between the two groups before training (P>0.05). After training through a 20-week treadmill, the total score of neuropsychiatric symptoms in patients with Alzheimer's disease in the experimental group (t=-1.317, P=0.204 before training; t=-10.01, P=0.046 after 20 weeks of training), affective symptoms (Before training, t=-1.684, P=0.092; t=-11.26, P=0.043 after 20 weeks of training, psychiatric symptoms (t=1.168 before training, P=0.235; t=-9.94 after training for 20 weeks, P=0.034)), behavioral symptoms (t=1.952 before training, P=0.129; t=-3.61, P=0.028 after 20 weeks of training), and QOL total score (t=1.452, P=0.140 before training; t=22.27 after training, P=0.040) were statistically different; and the improvement of neuropsychiatric symptoms in the experimental group was significantly different from that in the control group (F=23.10, P=0.000), while the QOL of the experimental group was also significantly different from the control group (t=- 8.88, P=0.000).@*Conclusion@#Non-pharmacological treatment with treadmill training can improve neuropsychiatric symptoms and improve quality of life in elderly AD patients.

Efficacy of treadmill training on neuropsychiatric symptoms and quality of life among elderly Alzheimer's disease / 中国实用护理杂志

Objective To analyze effect of Treadmill Training on neuropsychiatric symptoms and quality of life in elderly patients with Alzheimer′s disease. Methods From May 2018 to November 2018, the experimental design was adopted. The patients with 55-75 years old AD, the First Affiliated Hospital of Quanzhou Fujian Medical University were randomly divided into groups. Group (treadmill training, 68 patients), control group (no intervention, 68 patients). The two groups were evaluated before the training and 20 weeks after training, using the Neuropsychology Scale (NPI-Q) and the Alzheimer's disease Quality of Life Questionnaire (QOL-AD), and the t-test, two-factor repeated measures analysis of variance, etc. Statistical methods for data analysis. Results There were no significant differences in neuropsychiatric scores and QOL scores between the two groups before training (P＞0.05). After training through a 20-week treadmill, the total score of neuropsychiatric symptoms in patients with Alzheimer's disease in the experimental group (t=-1.317, P=0.204 before training; t=-10.01, P=0.046 after 20 weeks of training), affective symptoms ( Before training, t=-1.684, P=0.092; t=-11.26, P=0.043 after 20 weeks of training, psychiatric symptoms (t=1.168 before training, P=0.235; t=-9.94 after training for 20 weeks, P=0.034) ), behavioral symptoms (t=1.952 before training, P=0.129; t=-3.61, P=0.028 after 20 weeks of training), and QOL total score (t=1.452, P=0.140 before training; t=22.27 after training, P=0.040) were statistically different; and the improvement of neuropsychiatric symptoms in the experimental group was significantly different from that in the control group (F=23.10, P=0.000), while the QOL of the experimental group was also significantly different from the control group (t=- 8.88, P=0.000). Conclusion Non-pharmacological treatment with treadmill training can improve neuropsychiatric symptoms and improve quality of life in elderly AD patients.

Survival elongation of Pseudomonas aeruginosa improves power output of microbial fuel cells / 生物工程学报

The secondary metabolites, phenazine products, produced by Pseudomonas aeruginosa can mediate the electrons transfer in microbial fuel cells (MFCs). How increase the total electricity production in MFCs by improving the characteristics of Pseudomonas aeruginosa is one of research hot spots and problems. In this study, P. aeruginosa strain SJTD-1 and its knockout mutant strain SJTD-1 (ΔmvaT) were used to construct MFCs, and the discharge processes of the two MFCs were analyzed to determine the key factors to electricity yields. Results indicated that not only phenazine but also the viable cells in the fermentation broth were essential for the discharge of MFCs. The mutant strain SJTD-1 (ΔmvaT) could produce more phenazine products and continue discharging over 160 hours in MFCs, more than that of the wild-type SJTD-1 strain (90 hours discharging time). The total electricity generated by SJTD-1 (ΔmvaT) strain could achieve 2.32 J in the fermentation process, much higher than the total 1.30 J electricity of the wild-type SJTD-1 strain. Further cell growth analysis showed that the mutant strain SJTD-1 (ΔmvaT) could keep a longer stationary period, survive much longer in MFCs and therefore, discharge more electron than those of the wild-type SJTD-1 strain. Therefore, the cell survival elongation of P. aeruginosa in MFCs could enhance its discharging time and improve the overall energy yield. This work could give a clue to improve the characteristics of MFCs using genetic engineering strain, and could promote related application studies on MFCs.