Heterotrophic, Planktonic Bacteria and Cycling of Phosphorus

2000 ◽  
pp. 115-167 ◽  
Author(s):  
Olav Vadstein
Keyword(s):  
Planktonic Bacteria

1465 - Cell size distribution of planktonic bacteria in shallow lakes

2018 ◽  
Author(s):  
Zsuzsanna Márton ◽  
Bianka Csitári ◽  
Tamas Felfoldi ◽  
Anna J Szekely ◽  
Attila Szabo
Keyword(s):  
Size Distribution ◽  
Cell Size ◽  
Shallow Lakes ◽  
Cell Size Distribution ◽  
Planktonic Bacteria

Diversity and phylogenetic analysis of planktonic bacteria in eutrophic zone of Lake Wuliangsuhai

2009 ◽  
Vol 17 (5) ◽  
pp. 490 ◽  
Author(s):  
Sun Xin-xin ◽  
Liu Hui-rong ◽  
Feng Fu-ying ◽  
Meng Jian-yu ◽  
Li Heng ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Planktonic Bacteria

scholarly journals Spatio-temporal variation in number and production of neustonic and planktonic bacteria inhabiting polluted estuarine harbour channel

2021 ◽  
Vol 203 (9) ◽  
pp. 5547-5559
Author(s):  
Piotr Perliński ◽  
Zbigniew J. Mudryk ◽  
Marta Zdanowicz ◽  
Łukasz Kubera
Keyword(s):  
Seasonal Variation ◽  
Secondary Production ◽  
Seasonal Cycle ◽  
Subsurface Water ◽  
Surface Microlayer ◽  
Water Basin ◽  
Planktonic Bacteria ◽  
Microbiological Parameters ◽  
Spatio Temporal ◽  
Number Of Bacteria

AbstractThe aim of this paper was to determine the abundance and secondary production by bacteria inhabiting the surface microlayer and subsurface water in a specific water basin, i.e., polluted estuarine harbour channel. In a 3-year seasonal cycle, the total number of bacteria and their biomass were higher in the surface microlayer (SML) 7.57 × 108cells dm−3 and 15.86 µg C dm−3 than in the subsurface water (SSW) 4.25 × 108cells dm−3 and 9.11 µg C dm−3 of the studied channel. The opposite relationship was noted in the level of the secondary production (SML—37.16 μg C dm−3 h−1, SSW—60.26 μg C dm−3 h−1) in this water basin. According to the analysed microbiological parameters, the total number of bacteria and secondary production varied along the horizontal profile in the water of the studied channel. The total number of bacteria and their secondary production showed the seasonal variation as well.

Dilution-to-Extinction Culturing of Psychrotolerant Planktonic Bacteria from Permanently Ice-covered Lakes in the McMurdo Dry Valleys, Antarctica

2007 ◽  
Vol 55 (3) ◽  
pp. 395-405 ◽  
Author(s):  
U. Stingl ◽  
J.-C. Cho ◽  
W. Foo ◽  
K. L. Vergin ◽  
B. Lanoil ◽  
...  
Keyword(s):  
Mcmurdo Dry Valleys ◽  
Dry Valleys ◽  
Planktonic Bacteria

scholarly journals Fructose Enhanced Reduction of Bacterial Growth on Nanorough Surfaces

2013 ◽  
Vol 1498 ◽  
pp. 73-78 ◽  
Author(s):  
N. Gozde Durmus ◽  
Erik N. Taylor ◽  
Kim M. Kummer ◽  
Thomas J. Webster
Keyword(s):  
Bacterial Growth ◽  
Biofilm Formation ◽  
Antibacterial Agents ◽  
Bacteria Growth ◽  
Planktonic Bacteria ◽  
Combined Use ◽  
Wide Range ◽  
Metabolic Stimulation ◽  
Antibacterial Surfaces ◽  
First Time

ABSTRACTBiofilms are a major source of medical device-associated infections, due to their persistent growth and antibiotic resistance. Recent studies have shown that engineering surface nanoroughness has great potential to create antibacterial surfaces. In addition, stimulation of bacterial metabolism increases the efficacy of antibacterial agents to eradicate biofilms. In this study, we combined the antibacterial effects of nanorough topographies with metabolic stimulation (i.e., fructose metabolites) to further decrease bacterial growth on polyvinyl chloride (PVC) surfaces, without using antibiotics. We showed for the first time that the presence of fructose on nanorough PVC surfaces decreased planktonic bacteria growth and biofilm formation after 24 hours. Most importantly, a 60% decrease was observed on nanorough PVC surfaces soaked in a 10 mM fructose solution compared to conventional PVC surfaces. In this manner, this study demonstrated that bacteria growth can be significantly decreased through the combined use of fructose and nanorough surfaces and thus should be further studied for a wide range of antibacterial applications.

scholarly journals The role of planktonic bacteria in phosphorus cycling in lakes - Sink and link

1993 ◽  
Vol 38 (7) ◽  
pp. 1539-1544 ◽  
Author(s):  
Olav Vadstein ◽  
Yngvar Olsen ◽  
Helge Reinertsen ◽  
Arne Jensen
Keyword(s):  
Phosphorus Cycling ◽  
Planktonic Bacteria

scholarly journals Comparison of Single and Combined Use of Catechin, Protocatechuic, and Vanillic Acids as Antioxidant and Antibacterial Agents against Uropathogenic Escherichia Coli at Planktonic and Biofilm Levels

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2813 ◽  
Author(s):  
Ariadna Bernal-Mercado ◽  
Francisco Vazquez-Armenta ◽  
Melvin Tapia-Rodriguez ◽  
Maria Islas-Osuna ◽  
Veronica Mata-Haro ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Phenolic Compounds ◽  
Synergistic Effect ◽  
Vanillic Acid ◽  
Protocatechuic Acid ◽  
Uropathogenic Escherichia Coli ◽  
E Coli ◽  
Planktonic Bacteria ◽  
Combined Use ◽  
Antioxidant Agents

The objective of this study was to evaluate the effect of combining catechin, protocatechuic, and vanillic acids against planktonic growing, adhesion, and biofilm eradication of uropathogenic Escherichia coli (UPEC), as well as antioxidant agents. The minimum inhibitory concentrations (MIC) of protocatechuic, vanillic acids and catechin against the growth of planktonic bacteria were 12.98, 11.80, and 13.78 mM, respectively. Mixing 1.62 mM protocatechuic acid + 0.74 mM vanillic acid + 0.05 mM catechin resulted in a synergistic effect acting as an MIC. Similarly, the minimum concentrations of phenolic compounds to prevent UPEC adhesion and biofilm formation (MBIC) were 11.03 and 7.13 mM of protocatechuic and vanillic acids, respectively, whereas no MBIC of catechin was found. However, combinations of 1.62 mM protocatechuic acid + 0.74 mM vanillic acid + 0.05 mM catechin showed a synergistic effect acting as MBIC. On the other hand, the minimum concentrations to eradicate biofilms (MBEC) were 25.95 and 23.78 mM, respectively. The combination of 3.20 mM protocatechuic acid, 2.97 mM vanillic acid, and 1.72 mM catechin eradicated pre-formed biofilms. The antioxidant capacity of the combination of phenolics was higher than the expected theoretical values, indicating synergism by the DPPH•, ABTS, and FRAP assays. Effective concentrations of catechin, protocatechuic, and vanillic acids were reduced from 8 to 1378 times when combined. In contrast, the antibiotic nitrofurantoin was not effective in eradicating biofilms from silicone surfaces. In conclusion, the mixture of phenolic compounds was more effective in preventing cell adhesion and eradicating pre-formed biofilms of uropathogenic E. coli than single compounds and nitrofurantoin, and showed antioxidant synergy.

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