[Objective] The aim was to isolate the triazophos-degrading strain and study its degradation characteristics. [Method] A triazophos-degrading bacterium strain C-Y106 was isolated from sludge in an aeration tank of tri...[Objective] The aim was to isolate the triazophos-degrading strain and study its degradation characteristics. [Method] A triazophos-degrading bacterium strain C-Y106 was isolated from sludge in an aeration tank of triazophos manufacture. Then the strain C-Y106 was identified according to the morphology,physiological and biochemical characteristics,and 16S rRNA sequence analysis. The effect of medium with different nutrients on triazophos-degrading rate by C-Y106 was studied. [Result] The strain C-Y106 was identified as Bacillus subtilis. The strain C-Y106 could grow in the mineral salt medium with 40 mg/L of triazophos as the sole sources of carbon,Nitrogen and Phosphorus. The triazophos-degrading rate was the highest as 76.8% in the mineral salt medium with 40 mg/L of triazophos as the sole source of Phosphorus,after being incubated at 31 ℃,pH 8.0 and 150 r/min for 60 h. [Conclusion] The research had provided theoretical basis for the identification and purification of enzymes for triazophos degradation.展开更多
A comparative analysis of the codon usage bias was conducted in Methanosarcina mazei str. Goel and two related Euryarchaeota microorganisms （Picrophilus torridus str. DSM 9790 and Natronomonas pharaonis str. DSM 2160...A comparative analysis of the codon usage bias was conducted in Methanosarcina mazei str. Goel and two related Euryarchaeota microorganisms （Picrophilus torridus str. DSM 9790 and Natronomonas pharaonis str. DSM 2160）. Results revealed that synonymous codon usage in Methanosarcina mazei str. Goel was less biased, which was highly correlated with the GC3S value. And the codon usage patterns were phylogenetically conserved among those Euryarchaeota microorganisms. By employing a hierarchical clustering analysis, it can be seen that it is more the species than the gene function that determines their gene codon usage pattems. Considering that those microorganisms live in different environments where the pH conditions vary quite a lot, it can be presumed that their living environments, especially the pH conditions, play an important role in determining those microorganisms＇ codon usage pattems.展开更多
目的:调查四川地区北川羌族和西昌彝族两个少数民族群体中19个X-STRs基因座的遗传多态性,评估其法医学应用价值,并分析其群体结构。方法:收集北川羌族人群无关个体246例(男性188例,女性58例)和西昌彝族人群无关个体281例(男性116例,女性...目的:调查四川地区北川羌族和西昌彝族两个少数民族群体中19个X-STRs基因座的遗传多态性,评估其法医学应用价值,并分析其群体结构。方法:收集北川羌族人群无关个体246例(男性188例,女性58例)和西昌彝族人群无关个体281例(男性116例,女性165例)干血斑样本,采用Microreader^(TM)19X ID System kit直接扩增干血斑样本,ABI3500遗传分析仪对PCR产物进行毛细管电泳,GeneMapper■ ID-X软件自动分型。结果:在北川羌族群体中,共检测到150个等位基因,频率范围0.0033~0.8289;在西昌彝族群体中,共检测到164个等位基因,频率范围0.0022~0.8004。经统计学检验,两个少数民族群体基因频率分布均符合Hardy-Weinberg平衡定律(P>0.05),经Bonferroni校正后,不存在连锁不平衡的基因座。在北川羌族群体中,男性个体识别能力(PDM)和女性个体识别能力(PDF)分别是0.999999999945624、0.99999999999999999322,二联体和三联体累积平均排除概率分别是0.999999591813975、0.999999999465296;在西昌彝族群体中,男性个体识别能力(PDM)和女性个体识别能力(PDF)分别为0.999999999873529、1;二联体和三联体累积平均排除概率分别是0.999999284224924、0.999999998931424。结论:Microreader TM 19X ID荧光检测试剂盒在北川羌族和西昌彝族人群中总体多态性较高,鉴别能力较好,可作为亲权关系和个体识别有力的补充和验证手段。展开更多
Background Cognitive decline is a significant concern for stroke survivors,affecting their quality of life and increasing their burden on the healthcare system.DL-3-n butylphthalide(butylphthalide)has shown efficacy i...Background Cognitive decline is a significant concern for stroke survivors,affecting their quality of life and increasing their burden on the healthcare system.DL-3-n butylphthalide(butylphthalide)has shown efficacy in the short-term treatment of various cognitive impairments.This study evaluated the efficacy of butylphthalide in preventing cognitive decline over a 12-month period in patients with ischaemic stroke.Methods This prospective following-up study involved patients newly diagnosed with ischaemic stroke between 1 month and 6 months after stroke onset and not in the acute phase.Patients were assigned to either the butylphthalide or control group.Cognitive function was assessed using the mini-mental state examination(MMSE)at baseline and at the 12-month follow-up.Statistical analyses included t-tests,χ2 tests and multivariate regression analyses.Results Butylphthalide was negatively associated with the MMSE D-value(β=−0.122;95%CI−1.932 to−0.298;p=0.003)and the MMSE D-value percentage(β=−0.117;95%CI−0.057 to−0.011;p=0.004).A multivariate analysis indicated that butylphthalide treatment was negatively associated with both changes in orientation and language score.Additionally,the incidence of cognitive decline was significantly lower in the butylphthalide group(OR,0.612;p=0.020)than the control group.An age of≥60 years and lower educational level were identified as risk factors for lower cognitive score and cognitive decline.Conclusion This study demonstrated that butylphthalide is effective in preventing cognitive decline in patients with ischaemic stroke.These findings have significant implications for clinical practice,suggesting that butylphthalide could be incorporated into standard post-stroke care regimens to improve patient outcomes and reduce the healthcare burden.Additional multicentre double-blind trials are recommended to confirm these results in diverse populations.展开更多
文摘[Objective] The aim was to isolate the triazophos-degrading strain and study its degradation characteristics. [Method] A triazophos-degrading bacterium strain C-Y106 was isolated from sludge in an aeration tank of triazophos manufacture. Then the strain C-Y106 was identified according to the morphology,physiological and biochemical characteristics,and 16S rRNA sequence analysis. The effect of medium with different nutrients on triazophos-degrading rate by C-Y106 was studied. [Result] The strain C-Y106 was identified as Bacillus subtilis. The strain C-Y106 could grow in the mineral salt medium with 40 mg/L of triazophos as the sole sources of carbon,Nitrogen and Phosphorus. The triazophos-degrading rate was the highest as 76.8% in the mineral salt medium with 40 mg/L of triazophos as the sole source of Phosphorus,after being incubated at 31 ℃,pH 8.0 and 150 r/min for 60 h. [Conclusion] The research had provided theoretical basis for the identification and purification of enzymes for triazophos degradation.
文摘A comparative analysis of the codon usage bias was conducted in Methanosarcina mazei str. Goel and two related Euryarchaeota microorganisms （Picrophilus torridus str. DSM 9790 and Natronomonas pharaonis str. DSM 2160）. Results revealed that synonymous codon usage in Methanosarcina mazei str. Goel was less biased, which was highly correlated with the GC3S value. And the codon usage patterns were phylogenetically conserved among those Euryarchaeota microorganisms. By employing a hierarchical clustering analysis, it can be seen that it is more the species than the gene function that determines their gene codon usage pattems. Considering that those microorganisms live in different environments where the pH conditions vary quite a lot, it can be presumed that their living environments, especially the pH conditions, play an important role in determining those microorganisms＇ codon usage pattems.
文摘目的:调查四川地区北川羌族和西昌彝族两个少数民族群体中19个X-STRs基因座的遗传多态性,评估其法医学应用价值,并分析其群体结构。方法:收集北川羌族人群无关个体246例(男性188例,女性58例)和西昌彝族人群无关个体281例(男性116例,女性165例)干血斑样本,采用Microreader^(TM)19X ID System kit直接扩增干血斑样本,ABI3500遗传分析仪对PCR产物进行毛细管电泳,GeneMapper■ ID-X软件自动分型。结果:在北川羌族群体中,共检测到150个等位基因,频率范围0.0033~0.8289;在西昌彝族群体中,共检测到164个等位基因,频率范围0.0022~0.8004。经统计学检验,两个少数民族群体基因频率分布均符合Hardy-Weinberg平衡定律(P>0.05),经Bonferroni校正后,不存在连锁不平衡的基因座。在北川羌族群体中,男性个体识别能力(PDM)和女性个体识别能力(PDF)分别是0.999999999945624、0.99999999999999999322,二联体和三联体累积平均排除概率分别是0.999999591813975、0.999999999465296;在西昌彝族群体中,男性个体识别能力(PDM)和女性个体识别能力(PDF)分别为0.999999999873529、1;二联体和三联体累积平均排除概率分别是0.999999284224924、0.999999998931424。结论:Microreader TM 19X ID荧光检测试剂盒在北川羌族和西昌彝族人群中总体多态性较高,鉴别能力较好,可作为亲权关系和个体识别有力的补充和验证手段。
基金funded by Tianjin Municipal Health Commission(TJWJ2023QN115)。
文摘Background Cognitive decline is a significant concern for stroke survivors,affecting their quality of life and increasing their burden on the healthcare system.DL-3-n butylphthalide(butylphthalide)has shown efficacy in the short-term treatment of various cognitive impairments.This study evaluated the efficacy of butylphthalide in preventing cognitive decline over a 12-month period in patients with ischaemic stroke.Methods This prospective following-up study involved patients newly diagnosed with ischaemic stroke between 1 month and 6 months after stroke onset and not in the acute phase.Patients were assigned to either the butylphthalide or control group.Cognitive function was assessed using the mini-mental state examination(MMSE)at baseline and at the 12-month follow-up.Statistical analyses included t-tests,χ2 tests and multivariate regression analyses.Results Butylphthalide was negatively associated with the MMSE D-value(β=−0.122;95%CI−1.932 to−0.298;p=0.003)and the MMSE D-value percentage(β=−0.117;95%CI−0.057 to−0.011;p=0.004).A multivariate analysis indicated that butylphthalide treatment was negatively associated with both changes in orientation and language score.Additionally,the incidence of cognitive decline was significantly lower in the butylphthalide group(OR,0.612;p=0.020)than the control group.An age of≥60 years and lower educational level were identified as risk factors for lower cognitive score and cognitive decline.Conclusion This study demonstrated that butylphthalide is effective in preventing cognitive decline in patients with ischaemic stroke.These findings have significant implications for clinical practice,suggesting that butylphthalide could be incorporated into standard post-stroke care regimens to improve patient outcomes and reduce the healthcare burden.Additional multicentre double-blind trials are recommended to confirm these results in diverse populations.
