In the present study, agar diffusion test and field trials were carried out using a mushroom （Pleurotus ostreatus） culti- var Shouyanping as the experimental material to determine the antibacterial activity of refin...In the present study, agar diffusion test and field trials were carried out using a mushroom （Pleurotus ostreatus） culti- var Shouyanping as the experimental material to determine the antibacterial activity of refined pyroligneous acid prepared from almond shell against Pseudomonas tolaasfi and its effects on mycelial growth of mushroom. The results revealed that 1.25%, 2.50% and 5.00% of refined pyroligneous acid obviously inhibited the occurrence of brown blotch disease in mushroom, but also greatly promoted mushroom mycelial growth. Therefore, 1.25% and 2.50% of refined pyroligneous acid can be used in fields to prevent brown blotch disease, and 5.00% refined pyroligneous acid can be used to control the incidence of brown blotch disease when it widely occurs in fields.展开更多
目的研究呼吸重症监护室(respiratory medicine intensive care unit,RICU)不同病原菌感染与血清PCT、IL-6、TNF水平的相关性。方法选择我院2017年7月-2019年7月期间治疗的90例RICU患者作为研究组,并选择我院同期健康体检者50例进行研究...目的研究呼吸重症监护室(respiratory medicine intensive care unit,RICU)不同病原菌感染与血清PCT、IL-6、TNF水平的相关性。方法选择我院2017年7月-2019年7月期间治疗的90例RICU患者作为研究组,并选择我院同期健康体检者50例进行研究,在抗生素使用前采血,进行血培养,鉴别感染病原菌类别,同时采集血液检测PCT、IL-6、TNF水平。结果不同病原菌感染患者之间IL-6水平无差异,P>0.05,健康者与研究组之间PCT、IL-6、TNF水平均有差异,但PCT、TNF中由高到低逐渐为G-菌、G+菌、真菌,差异显著,P<0.05。复合感染健康者与研究组之间PCT、IL-6、TNF水平均有差异,P<0.05,但不同病原菌感染复合感染患者之间PCT、IL-6、TNF水平无差异,P>0.05。结论在单一病原菌感染情况下,G-菌感染者PCT、TNF水平、阳性率较高,G+与真菌感染者较低;IL-6不可用于单一病原菌感染患者的诊断,但可作为感染性疾病初期诊断指标。展开更多
Multivariate statistical techniques,such as principal component analysis(PCA),factor analysis(FA)and cluster analysis(CA),were applied to evaluating and interpreting the surface water quality datasets of the Songhua R...Multivariate statistical techniques,such as principal component analysis(PCA),factor analysis(FA)and cluster analysis(CA),were applied to evaluating and interpreting the surface water quality datasets of the Songhua River Basin(SRB)in China,obtained during two years(2012-2013)of monitoring of 13 physicochemical parameters at 29 different sites.PCA assisted to recognize the factors or origins responsible for surface water quality variations and identified three latent factors and explained 83.79%of the total variance,standing for organic pollution,metal pollution and oil pollution,respectively.FA revealed that the SRB water chemistry was strongly affected by the discharge of industrial,agricultural and municipal sewage water,mining operations and petroleum exploitation.Hierarchical CA grouped 29 different sampling sites into three groups,i.e.,relatively less polluted(LP),moderately polluted(MP)and highly polluted(HP)sites,based on the similarity of water quality characteristics.This study illustrates the usefulness of multivariate statistical techniques for the analysis and interpretation of huge and complex data sets,identification of pollution sources and better understanding variations in water quality for effective surface water management.展开更多
Energy-related CO2 emissions from Tianjin’s production and household sectors during 2000–2012 were calculated based on the default carbon-emission coefficients provided by the Intergovernmental Panel on Climate Chan...Energy-related CO2 emissions from Tianjin’s production and household sectors during 2000–2012 were calculated based on the default carbon-emission coefficients provided by the Intergovernmental Panel on Climate Change.Grey relational analysis was used in this study to capture the dynamic characteristics of 12 different factors related to CO2 emissions.The results indicated that population scale and structure,industrial structure,per capita disposable income,energy consumption and structure appeared as the main drivers related to the CO2 emissions increase during the study period.Based on the research,we make the policy recommendations including optimizing the industrial structure and energy structure,improving energy efficiency and promoting low-carbon consumption.展开更多
Solubilizing experiments were carried out to evaluate the ability of biodiesel to remove polycyclic aromatic hydrocarbons(PAHs)from highly contaminated manufactured gas plant(MGP)and PAHs spiked soils with hydroxyprop...Solubilizing experiments were carried out to evaluate the ability of biodiesel to remove polycyclic aromatic hydrocarbons(PAHs)from highly contaminated manufactured gas plant(MGP)and PAHs spiked soils with hydroxypropyl-β-cyclodextrin(HPCD)and tween 80 as comparisons.Biodiesel displayed the highest solubilities of phenanthrene(420.7 mg·L^(-1)),pyrene(541.0 mg·L^(-1)),and benzo(a)pyrene(436.3 mg·L^(-1)).These corresponded to several fold increases relative to 10%HPCD and tween 80.Biodiesel showed a good efficiency for PAH removal from the spiked and MGP soils for both low molecular weight and high molecular weight PAHs at high concentrations.Biodiesel was the best agent for PAH removal from the spiked soils as compared with HPCD and tween 80;as over 77.9%of individual PAH were removed by biodiesel.Tween 80 also showed comparable capability with biodiesel for PAH solubilization at a concentration of 10%for the spiked soils.Biodiesel solubilized a wider range of PAHs as compared to HPCD and tween 80 for the MPG soils.At PAH concentrations of 229.6 and 996.9 mg·kg^(-1),biodiesel showed obvious advantage over the 10%HPCD and tween 80,because it removed higher than 80%of total PAH.In this study,a significant difference between PAH removals from the spiked and field MGP soils was observed;PAH removals from the MGP soil by HPCD and tween 80 were much lower than those from the spiked soil.These results demonstrate that the potential for utilizing biodiesel for remediation of highly PAH-contaminated soil has been established.展开更多
基金Supported by the fund of Science and Technology Department of Hebei Province(13226511)the fund of Chengde Municipal Finance Bureau(CZ2014002,CZ2013007)the fund of Chengde Municipal Science and Technology Bureau(20157029)
文摘In the present study, agar diffusion test and field trials were carried out using a mushroom （Pleurotus ostreatus） culti- var Shouyanping as the experimental material to determine the antibacterial activity of refined pyroligneous acid prepared from almond shell against Pseudomonas tolaasfi and its effects on mycelial growth of mushroom. The results revealed that 1.25%, 2.50% and 5.00% of refined pyroligneous acid obviously inhibited the occurrence of brown blotch disease in mushroom, but also greatly promoted mushroom mycelial growth. Therefore, 1.25% and 2.50% of refined pyroligneous acid can be used in fields to prevent brown blotch disease, and 5.00% refined pyroligneous acid can be used to control the incidence of brown blotch disease when it widely occurs in fields.
文摘目的研究呼吸重症监护室(respiratory medicine intensive care unit,RICU)不同病原菌感染与血清PCT、IL-6、TNF水平的相关性。方法选择我院2017年7月-2019年7月期间治疗的90例RICU患者作为研究组,并选择我院同期健康体检者50例进行研究,在抗生素使用前采血,进行血培养,鉴别感染病原菌类别,同时采集血液检测PCT、IL-6、TNF水平。结果不同病原菌感染患者之间IL-6水平无差异,P>0.05,健康者与研究组之间PCT、IL-6、TNF水平均有差异,但PCT、TNF中由高到低逐渐为G-菌、G+菌、真菌,差异显著,P<0.05。复合感染健康者与研究组之间PCT、IL-6、TNF水平均有差异,P<0.05,但不同病原菌感染复合感染患者之间PCT、IL-6、TNF水平无差异,P>0.05。结论在单一病原菌感染情况下,G-菌感染者PCT、TNF水平、阳性率较高,G+与真菌感染者较低;IL-6不可用于单一病原菌感染患者的诊断,但可作为感染性疾病初期诊断指标。
文摘Multivariate statistical techniques,such as principal component analysis(PCA),factor analysis(FA)and cluster analysis(CA),were applied to evaluating and interpreting the surface water quality datasets of the Songhua River Basin(SRB)in China,obtained during two years(2012-2013)of monitoring of 13 physicochemical parameters at 29 different sites.PCA assisted to recognize the factors or origins responsible for surface water quality variations and identified three latent factors and explained 83.79%of the total variance,standing for organic pollution,metal pollution and oil pollution,respectively.FA revealed that the SRB water chemistry was strongly affected by the discharge of industrial,agricultural and municipal sewage water,mining operations and petroleum exploitation.Hierarchical CA grouped 29 different sampling sites into three groups,i.e.,relatively less polluted(LP),moderately polluted(MP)and highly polluted(HP)sites,based on the similarity of water quality characteristics.This study illustrates the usefulness of multivariate statistical techniques for the analysis and interpretation of huge and complex data sets,identification of pollution sources and better understanding variations in water quality for effective surface water management.
文摘Energy-related CO2 emissions from Tianjin’s production and household sectors during 2000–2012 were calculated based on the default carbon-emission coefficients provided by the Intergovernmental Panel on Climate Change.Grey relational analysis was used in this study to capture the dynamic characteristics of 12 different factors related to CO2 emissions.The results indicated that population scale and structure,industrial structure,per capita disposable income,energy consumption and structure appeared as the main drivers related to the CO2 emissions increase during the study period.Based on the research,we make the policy recommendations including optimizing the industrial structure and energy structure,improving energy efficiency and promoting low-carbon consumption.
基金This work was supported by the National Natural Science Foundation of China(Grant No.20707030)the National High Technology Research and Development Program(863 program)of China(No.2008AA06Z331)the National Basic Research Program(973 Program)of China(No.2004CB418506).
文摘Solubilizing experiments were carried out to evaluate the ability of biodiesel to remove polycyclic aromatic hydrocarbons(PAHs)from highly contaminated manufactured gas plant(MGP)and PAHs spiked soils with hydroxypropyl-β-cyclodextrin(HPCD)and tween 80 as comparisons.Biodiesel displayed the highest solubilities of phenanthrene(420.7 mg·L^(-1)),pyrene(541.0 mg·L^(-1)),and benzo(a)pyrene(436.3 mg·L^(-1)).These corresponded to several fold increases relative to 10%HPCD and tween 80.Biodiesel showed a good efficiency for PAH removal from the spiked and MGP soils for both low molecular weight and high molecular weight PAHs at high concentrations.Biodiesel was the best agent for PAH removal from the spiked soils as compared with HPCD and tween 80;as over 77.9%of individual PAH were removed by biodiesel.Tween 80 also showed comparable capability with biodiesel for PAH solubilization at a concentration of 10%for the spiked soils.Biodiesel solubilized a wider range of PAHs as compared to HPCD and tween 80 for the MPG soils.At PAH concentrations of 229.6 and 996.9 mg·kg^(-1),biodiesel showed obvious advantage over the 10%HPCD and tween 80,because it removed higher than 80%of total PAH.In this study,a significant difference between PAH removals from the spiked and field MGP soils was observed;PAH removals from the MGP soil by HPCD and tween 80 were much lower than those from the spiked soil.These results demonstrate that the potential for utilizing biodiesel for remediation of highly PAH-contaminated soil has been established.
