针对生物实验室污水处理难度高及其秋冬季节达标率低的问题,采用改进工艺的悬浮填料生物膜反应器(moving bed biofilm reactor,MBBR)进行连续处理,观察秋冬季节MBBR水质处理效果,利用高通量测序技术研究环境因子水温(T^w)、溶解氧(DO)...针对生物实验室污水处理难度高及其秋冬季节达标率低的问题,采用改进工艺的悬浮填料生物膜反应器(moving bed biofilm reactor,MBBR)进行连续处理,观察秋冬季节MBBR水质处理效果,利用高通量测序技术研究环境因子水温(T^w)、溶解氧(DO)、pH对生物膜细菌群落更替的影响以及主要微生物种群变化。结果表明,T^w由26℃下降到10℃期间,反应器COD、NH^+4-N去除率仍然分别保持在75%、80%左右,MBBR出水稳定在一级A标准。变形菌门(Proteobacteria)、拟杆菌门(Bacteroidetes)和浮霉菌门(Planctomycetes)是生物膜主要优势菌门,T^w的下降引起拟杆菌门的相对丰度显著升高。假单胞菌属(Pseudomonas)和黄杆菌属(Flavobacterium)在低T^w下成为优势菌属,动胶菌属(Zoogloea)相对丰度保持稳定。通过冗余分析(RDA)发现,DO与短波单胞菌属(Brevundimonas)、pH与脱氯单胞菌(Dechloromonas)、固氮弧菌属(Azoarcus)具有显著正相关性,T^w与假单胞菌属、黄杆菌属具有显著负相关性。MBBR结果揭示,细菌群落动态更替是MBBR出水水质仍然保持稳定的重要原因。展开更多
This study investigated hypolipidemic,weight-reducing,and hepatoprotective effects of Antrodia cinnamomea mycelial extract obtained from solid-state culture(ACME)in an HFr D-induced obese/hyperlipidemic mouse model.Fo...This study investigated hypolipidemic,weight-reducing,and hepatoprotective effects of Antrodia cinnamomea mycelial extract obtained from solid-state culture(ACME)in an HFr D-induced obese/hyperlipidemic mouse model.Following 4-week ACME treatment,body weight,epididymal fat index,and some serum biochemical indices were measured.Expression levels of some related genes involved in cholesterol and lipid metabolism were analyzed by q RT-PCR.Moreover,histological studies of hepatic tissues were also conducted.After ACME treatment,body weight and epididymal fat index were significantly lower than that in model control group.ACME and simvastatin significantly reduced serum total cholesterol(T-CHO)and low-density lipoprotein cholesterol(LDL-C)levels,and increased high-density lipoprotein cholesterol(HDL-C)level.Subsequent experiments showed that:(i)ACME regulated transcriptional expression of 3-hydroxy-3-methylglutaryl-Co A reductase(HMGR),low-density lipoprotein receptor(LDLR),adipose triglyceride lipase(ATGL),and fatty acid synthase(FAS),with consequent reduction of blood lipid levels and body weight;(ii)ACME enhanced total antioxidant capacity(T-AOC)and superoxide dismutase(SOD)activity in hepatic tissues;(iii)ACME reduced malondialdehyde(MDA)level and ameliorated lipid oxidative damage in liver.Our findings indicate that ACME is a strong candidate for development as a novel anti-hyperlipidemia and anti-obesity health product.展开更多
文摘针对生物实验室污水处理难度高及其秋冬季节达标率低的问题,采用改进工艺的悬浮填料生物膜反应器(moving bed biofilm reactor,MBBR)进行连续处理,观察秋冬季节MBBR水质处理效果,利用高通量测序技术研究环境因子水温(T^w)、溶解氧(DO)、pH对生物膜细菌群落更替的影响以及主要微生物种群变化。结果表明,T^w由26℃下降到10℃期间,反应器COD、NH^+4-N去除率仍然分别保持在75%、80%左右,MBBR出水稳定在一级A标准。变形菌门(Proteobacteria)、拟杆菌门(Bacteroidetes)和浮霉菌门(Planctomycetes)是生物膜主要优势菌门,T^w的下降引起拟杆菌门的相对丰度显著升高。假单胞菌属(Pseudomonas)和黄杆菌属(Flavobacterium)在低T^w下成为优势菌属,动胶菌属(Zoogloea)相对丰度保持稳定。通过冗余分析(RDA)发现,DO与短波单胞菌属(Brevundimonas)、pH与脱氯单胞菌(Dechloromonas)、固氮弧菌属(Azoarcus)具有显著正相关性,T^w与假单胞菌属、黄杆菌属具有显著负相关性。MBBR结果揭示,细菌群落动态更替是MBBR出水水质仍然保持稳定的重要原因。
基金Fundamental Research Funds for the Central Universities of China(2662019PY066,2662016PY132)。
文摘This study investigated hypolipidemic,weight-reducing,and hepatoprotective effects of Antrodia cinnamomea mycelial extract obtained from solid-state culture(ACME)in an HFr D-induced obese/hyperlipidemic mouse model.Following 4-week ACME treatment,body weight,epididymal fat index,and some serum biochemical indices were measured.Expression levels of some related genes involved in cholesterol and lipid metabolism were analyzed by q RT-PCR.Moreover,histological studies of hepatic tissues were also conducted.After ACME treatment,body weight and epididymal fat index were significantly lower than that in model control group.ACME and simvastatin significantly reduced serum total cholesterol(T-CHO)and low-density lipoprotein cholesterol(LDL-C)levels,and increased high-density lipoprotein cholesterol(HDL-C)level.Subsequent experiments showed that:(i)ACME regulated transcriptional expression of 3-hydroxy-3-methylglutaryl-Co A reductase(HMGR),low-density lipoprotein receptor(LDLR),adipose triglyceride lipase(ATGL),and fatty acid synthase(FAS),with consequent reduction of blood lipid levels and body weight;(ii)ACME enhanced total antioxidant capacity(T-AOC)and superoxide dismutase(SOD)activity in hepatic tissues;(iii)ACME reduced malondialdehyde(MDA)level and ameliorated lipid oxidative damage in liver.Our findings indicate that ACME is a strong candidate for development as a novel anti-hyperlipidemia and anti-obesity health product.
