Ecological selection of bacterial taxa with larger genome sizes in response to polycyclic aromatic hydrocarbons stress

2022 ◽  
Vol 112 ◽  
pp. 82-93
Author(s):  
Yuzhu Dong ◽  
Shanghua Wu ◽  
Haonan Fan ◽  
Xianglong Li ◽  
Yijing Li ◽  
...  
2000 ◽  
Vol 83 (4) ◽  
pp. 977-984 ◽  
Author(s):  
Áurea Andrade Eiroa ◽  
Esther Vázquez Blanco ◽  
Purificación López Mahía ◽  
Soledad Muniategui Lorenzo ◽  
Darío Prada Rodríguez ◽  
...  

Abstract The most suitable wavelength intervals were selected for the determination of 4 polycyclic aromatic hydrocarbons (PAHs; benzo[g,h,i]perylene, dibenzo[a,h]anthracene, pyrene, and triphenylene) in very complex mixtures of 11 PAHs: anthracene, benz[a]anthracene, benzo[a]pyrene, benzo[b]fluoranthene, benzo[g,h,i]perylene, benzo[k]fluoranthene, chrysene, dibenz[a,h]anthracene, phenanthrene, pyrene, and triphenylene. The multiple linear regression algorithm was applied to measurements made in several wavelength intervals previously selected on the basis of sensitivity and minimum number of interfering compounds. Of the different models obtained, those displaying minimum error propagation in the analytical result were selected. By applying the models proposed in this study, we precisely and accurately determined benzo[g,h,i]perylene, dibenz[a,h]anthracene, pyrene, and triphenylene in complex mixtures—a feat that could not be achieved by the use of constant-wavelength spectrofluorimetry in combination with second-derivative techniques.


2020 ◽  
Vol 3 (1) ◽  
pp. 8
Author(s):  
Naveen Kumar ◽  
Rashmi Tyagi ◽  
V.K. Tyagi

The solubilization of polycyclic aromatic hydrocarbons (PAHs) such as naphthalene, phenanthrene and pyrene by single and mixed anionic dimeric surfactants was investigated and correlated with micellar properties of these surfactants. The surface and micellar properties of single and binary mixed combinations of anionic dimeric surfactants have been studied through surface tension as well as conductivity measurements at 300 K. The associations between their micelle properties and solubilizing efficiency towards PAHs have been quantified and discussed in terms of the molar solubilization ratio (MSR), micelle-water partition coefficient (Km) and standard free energy of solubilization (ΔG0S).The negative value of ΔG0Sexhibits spontaneously the solubilization process. The MSR values increase with the order “pyrene < phenanthrene < naphthalene”. The current study provides significant information for the selection of mixed dimeric surfactants for solubilizing water-insoluble compounds.


2019 ◽  
Vol 64 (1) ◽  
pp. 55-67
Author(s):  
Vlad Pӑnescu ◽  
◽  
Mihaela Cӑtӑlina Herghelegiu ◽  
Sorin Pop ◽  
Mircea Anton ◽  
...  

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