Corn rod-like WO<sub>3</sub> nanomaterials were successfully synthesized by a simple hydrothermal method. The morphology, structure and optical absorption properties of the prepared samples were characteri...Corn rod-like WO<sub>3</sub> nanomaterials were successfully synthesized by a simple hydrothermal method. The morphology, structure and optical absorption properties of the prepared samples were characterized by SEM, XRD, FTIR and UV-Vis-DRS. The WO<sub>3</sub> materials were corn rod-like morphology with about 800 nm for length and 150 nm for diameter, especially there were plenty of corn particles (about 20 nm) on the surface of corn rods. The X-ray diffraction peaks of the products corresponded with WO<sub>3</sub> standard card, and the characteristic peak of W-O bond was found in the infrared spectrum. The absorption band edge of the products was about 480 nm, indicating their potential visible-light-induced photocatalytic activity. In situ FTIR technology research showed that the prepared WO<sub>3</sub> nanomaterials had visible photocatalytic activity to gas-phase toluene. After a photocatalytic reaction for 8 hours toluene was effectively degraded, and carboxylic acid and aldehyde could be regarded as the intermediate products, and CO<sub>2</sub> was produced as the final product during the reaction process.展开更多
Artificial nest boxes are placed to attract birds to nest and breed in a specific location,and they are widely used in avian ecology research and in the attraction of insectivorous birds.There is evidence that artific...Artificial nest boxes are placed to attract birds to nest and breed in a specific location,and they are widely used in avian ecology research and in the attraction of insectivorous birds.There is evidence that artificial nest boxes can adversely affect breeding fitness but no great focus has been placed on this issue by researchers.Therefore,we retrieved 321 research papers regarding artificial nest boxes published from 2003 to 2022 and used the'Biblioshiny'program to extract and integrate keywords;we then summarized the adverse effects of artificial nest boxes on avian breeding success.The studies highlighted many drawbacks and misuses in the designing and placement of nest boxes;furthermore,bird attraction was decreased by their inappropriate selection,thus reducing breeding success.Regarding nest box production,there were shortcomings in the construction material,color,smell,and structural design of the boxes used.Nest boxes were also placed at inappropriate densities,locations,orientations,heights,and managed incorrectly.Finally,we propose suggestions for more efficient and safer artificial nest boxes for future use in avian ecology research and bird conservation.展开更多
The sources and ecological risk from sixteen polycyclic aromatic hydrocarbons in surface sediment in the Liaodong Bay were investigated from 2014 to 2015.The total concentrations of PAHs ranged from 88.5 to 347.1 ng/g...The sources and ecological risk from sixteen polycyclic aromatic hydrocarbons in surface sediment in the Liaodong Bay were investigated from 2014 to 2015.The total concentrations of PAHs ranged from 88.5 to 347.1 ng/g,and the high value occurred in the central region of the Liaodong Bay.Cluster analysis identified two site clusters representing the coastal region affected by land-based pollution and the central region of the Liaodong Bay.Principal component analysis-multiple linear regression and diagnostic ratios suggested that PAHs contaminants originated from a mixture of combustion and petroleum sources,and the major was combustion sources.Based on sediment quality guideline,naphthalene,acenaphthylene,acenaphthene,phenanthrene and dibenz[a,h]anthracene may occasionally cause adverse biological effects in some stations.The toxic equivalent concentrations of carcinogenic PAHs indicated low carcinogenic risk for the Liaodong Bay.The ecological risk and toxic pollution levels of PAHs were higher in the central region than in the coastal region along the Liaodong Bay.展开更多
Sponges (phylum Porifera) are the phylogenetically oldest metazoa and highly efficient filter feeders.In the marine ecosystem,they are unconditionally exposed to environmental stresses.Understanding the sponge-bacteri...Sponges (phylum Porifera) are the phylogenetically oldest metazoa and highly efficient filter feeders.In the marine ecosystem,they are unconditionally exposed to environmental stresses.Understanding the sponge-bacteria interaction is hence of both ecological and biological significance.This study investigated the specific interaction between the sponge Hymeniacidon perleve and the non-infectious bacteria,Escherichia coli and infectious bacteria,Vibrio spp.by measuring the 14-3-3 mRNA expression of H.perleve.Three partial cDNAs of 14-3-3 proteins and partial 18S RNA in H.perleve were cloned and sequenced.Using Reverse-transcription real-time PCR,the 14-3-3 mRNA expression of H.perleve was examined when exposed to three common bacteria in aquatic water-E.coli and two Vibrio spp.for different time and dosages.H.perleve could efficiently remove E.coli from the water column without self-infection;however Vibrio at higher dosages infected H.perleve.When H.perleve was exposed to E.coli (1.1×10 7 CFU mL-1),V.anguillarum Ⅱ (1.2×10 6 CFU mL-1) and V.alginolyticus (3.6×105 CFU mL-1) for 6h,the 14-3-3 mRNA expression in the V.anguillarum Ⅱ and V.alginolyticus groups was down-regulated by 2.67-and 2.36-fold,respectively.The 14-3-3 mRNA expression in the E.coli group was not significantly different.However,no clear trend was observed on the 14-3-3 transcript levels of H.perleve in response to different doses of V.anguillarum Ⅱ for different time.The results demonstrated that infectious bacteria can be discriminated by 14-3-3 mRNA expression of sponge H.perleve.展开更多
文摘Corn rod-like WO<sub>3</sub> nanomaterials were successfully synthesized by a simple hydrothermal method. The morphology, structure and optical absorption properties of the prepared samples were characterized by SEM, XRD, FTIR and UV-Vis-DRS. The WO<sub>3</sub> materials were corn rod-like morphology with about 800 nm for length and 150 nm for diameter, especially there were plenty of corn particles (about 20 nm) on the surface of corn rods. The X-ray diffraction peaks of the products corresponded with WO<sub>3</sub> standard card, and the characteristic peak of W-O bond was found in the infrared spectrum. The absorption band edge of the products was about 480 nm, indicating their potential visible-light-induced photocatalytic activity. In situ FTIR technology research showed that the prepared WO<sub>3</sub> nanomaterials had visible photocatalytic activity to gas-phase toluene. After a photocatalytic reaction for 8 hours toluene was effectively degraded, and carboxylic acid and aldehyde could be regarded as the intermediate products, and CO<sub>2</sub> was produced as the final product during the reaction process.
基金supported by the National Natural Science Foundation of China(Grant No.32170485,31501867)the Fundamental Research Funds for the Central Universities(Grant No.2572022BE02)。
文摘Artificial nest boxes are placed to attract birds to nest and breed in a specific location,and they are widely used in avian ecology research and in the attraction of insectivorous birds.There is evidence that artificial nest boxes can adversely affect breeding fitness but no great focus has been placed on this issue by researchers.Therefore,we retrieved 321 research papers regarding artificial nest boxes published from 2003 to 2022 and used the'Biblioshiny'program to extract and integrate keywords;we then summarized the adverse effects of artificial nest boxes on avian breeding success.The studies highlighted many drawbacks and misuses in the designing and placement of nest boxes;furthermore,bird attraction was decreased by their inappropriate selection,thus reducing breeding success.Regarding nest box production,there were shortcomings in the construction material,color,smell,and structural design of the boxes used.Nest boxes were also placed at inappropriate densities,locations,orientations,heights,and managed incorrectly.Finally,we propose suggestions for more efficient and safer artificial nest boxes for future use in avian ecology research and bird conservation.
基金The Liaoning Province Natural Science Foundation under contract No.201602409the Public Science and Technology Research Funds Projects of Ocean under contract No.201505019
文摘The sources and ecological risk from sixteen polycyclic aromatic hydrocarbons in surface sediment in the Liaodong Bay were investigated from 2014 to 2015.The total concentrations of PAHs ranged from 88.5 to 347.1 ng/g,and the high value occurred in the central region of the Liaodong Bay.Cluster analysis identified two site clusters representing the coastal region affected by land-based pollution and the central region of the Liaodong Bay.Principal component analysis-multiple linear regression and diagnostic ratios suggested that PAHs contaminants originated from a mixture of combustion and petroleum sources,and the major was combustion sources.Based on sediment quality guideline,naphthalene,acenaphthylene,acenaphthene,phenanthrene and dibenz[a,h]anthracene may occasionally cause adverse biological effects in some stations.The toxic equivalent concentrations of carcinogenic PAHs indicated low carcinogenic risk for the Liaodong Bay.The ecological risk and toxic pollution levels of PAHs were higher in the central region than in the coastal region along the Liaodong Bay.
基金Project(51308086)supported by the National Natural Science Foundation of ChinaProject(LJQ2015020)supported by the Program for Liaoning Excellent Talents in University,ChinaProject(2016RQ051)supported by the Program of Science-Technology Star for Young Scholars by the Dalian Municipality,China
基金financial supports from Chinese Academy of Sciences"Innovation Fund"from Dalian Institute of Chemical Physics+7 种基金National Hi-Tech Research and Development Program of China(2006AA09Z435)the European Commission(Project:EVK3-CT1999-00005UVTOX)Ph.D.Research Fund from Science and Technology Bureau of Liaoning Province of China(20091019)Laboratory Program from Key Laboratory of Nearshore Marine Environmental Research of Liaoning Higher Education(LS2010024)Science and Technology Program from Ocean and Fisheries Department of Liaoning Province of China(200917)Open Laboratory Program from Key and Open Laboratory of Marine and Estuarine Fisheries Resources and EcologyMinistry of Agriculture of the People's Republic of China(Open-09-13)Public Welfare Projects from State Oceanic Administration(200805030)
文摘Sponges (phylum Porifera) are the phylogenetically oldest metazoa and highly efficient filter feeders.In the marine ecosystem,they are unconditionally exposed to environmental stresses.Understanding the sponge-bacteria interaction is hence of both ecological and biological significance.This study investigated the specific interaction between the sponge Hymeniacidon perleve and the non-infectious bacteria,Escherichia coli and infectious bacteria,Vibrio spp.by measuring the 14-3-3 mRNA expression of H.perleve.Three partial cDNAs of 14-3-3 proteins and partial 18S RNA in H.perleve were cloned and sequenced.Using Reverse-transcription real-time PCR,the 14-3-3 mRNA expression of H.perleve was examined when exposed to three common bacteria in aquatic water-E.coli and two Vibrio spp.for different time and dosages.H.perleve could efficiently remove E.coli from the water column without self-infection;however Vibrio at higher dosages infected H.perleve.When H.perleve was exposed to E.coli (1.1×10 7 CFU mL-1),V.anguillarum Ⅱ (1.2×10 6 CFU mL-1) and V.alginolyticus (3.6×105 CFU mL-1) for 6h,the 14-3-3 mRNA expression in the V.anguillarum Ⅱ and V.alginolyticus groups was down-regulated by 2.67-and 2.36-fold,respectively.The 14-3-3 mRNA expression in the E.coli group was not significantly different.However,no clear trend was observed on the 14-3-3 transcript levels of H.perleve in response to different doses of V.anguillarum Ⅱ for different time.The results demonstrated that infectious bacteria can be discriminated by 14-3-3 mRNA expression of sponge H.perleve.
