kerosene is the colorless liquid and slightly heavier than gasoline thatspecific odor removes after evaporation. soil and underground water source arecontaminated with different pollutants such as petroleum hydrocarbons. these pollutantshave various negative environmental effects on soil and surrounding environment. theaim of this research is to understand the effect of kerosene pollution on tw...

A study aimed at evaluating the health risks of water used for fish farming in Obili pond was carried out January 2021. The variables retained this work were measured according to standard protocols and are meteorological order (brightness, air temperature humidity); physicochemical (water temperature, pH, TDS, color, turbidity, suspended matter, dissolved oxygen, carbon dioxide, electrical con...

We measured the vertical and seasonal distribution of picoplankton (0.2-2 microm) and nanoplankton (2-20 microm) in the photic layer of Cuban southern oceanic and coastal waters. The concentration of the different fractions was estimated by epifluorescence microscopy. Heterotrophic components from the different fractions showed higher vertical stratification in the oceanic station in comparison...

Membrane hydrophilic modification has been applied as an effective antifouling strategy for aerobic and anaerobic heterotrophic membrane bioreactors (MBRs), while its performance remains unclear ammonium oxidation (anammox) MBR. Herein, membranes (Mh) modified from pristine nylon fabric meshes (Mp, pore size of 20 μm), were in long-term operation anammox Although the average flux Mh was 90.7% h...

A study was carried out with the objective of evaluating microbiological and physicochemical quality surface water in Nkolafamba subdivision, Center Region Cameroon. Five sampling points were selected based on several criteria. The bacteria isolated Mesophilic Aerobic Heterotrophic Bacteria (BHAM), that witnesses to faecal contamination Pseudomonas. Some abiotic parameters measured using usual ...

materials and methods one hundred ssis specimens were obtained by needle aspiration from purulent material in depth of infected site. these specimens were cultured and incubated in both aerobic and anaerobic condition. for detection of antibiotic susceptibility pattern in aerobic and anaerobic bacteria, we used disk diffusion, agar dilution, and e-test methods. results a total of 194 bacterial ...

The impact of storm conditions on the heterotrophic activity of planktonic bacteria in a southwestern reservoir was investigated. Storm events were considered as rainfall in excess of 2.5 cm in a 24-h period before sampling. Storm conditions stimulated heterotrophic activities and resulted in increased uptake rates and decreased turnover times of glutamate and acetate. Uptake rates were 45 to 7...

Inactivation and microbial regrowth of penicillin-, ampicillin-, cefalexin-, tetracycline-, chloramphenicol-, and rifampicin-resistant bacteria were studied to explore risks associated with selection and regrowth of antibiotic-resistant bacteria after PAA disinfection. The results showed that after exposure to 20 mg/L PAA for 10 min, inactivation of ampicillin-resistant bacteria reached 2.3-log...

Biodegradable polymers undergo a degradation process resulting from the action of microorganisms such as bacteria, fungi and algae. Poly(butylene adipate co-terephthalate) (PBAT) is considered biodegradable synthetic polymer, even if its has been confirmed under industrial composting conditions, investigation in marine environment still limited. Therefore, this work aims to study biodegradation...