Identification of microbial strategies for labile substrate utilization at phylogenetic classification using a microcosm approach

Microbiological detoxification of hazardous organic pollutants is highly promising, but its reliable implementation requires a sophisticated understanding of several different substrate types and how they interact. This paper carefully defines the substrate types and explains how their interactions affect the bacteria's electron and energy flows, information flow, and degradative activity. For example, primary substrates, which are essential for growth and maintenance of the bacteria, also interact with degradation of specific hazardous pollutants by being inducers, inhibitors, and direct or indirect cosubstrates. The target contaminants, which often are secondary substrates, also have the interactive roles of self-inhibitor, inhibitor of primary-substrate utilization, inducer, and a part of an aggregate primary substrate.

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Applying phenotypic fingerprinting in the management of wastewater treatment systems

Water Science & Technology ◽

10.2166/wst.1998.0694 ◽

1998 ◽

Vol 37 (4-5) ◽

pp. 461-464 ◽

Cited By ~ 3

Author(s):

C. A. Schneider ◽

K. Mo ◽

S. N. Liss

Keyword(s):

Paper Mill ◽

Substrate Utilization ◽

Pulp And Paper ◽

Effluent Treatment ◽

Management Tool ◽

Carbon Substrate ◽

Pulp And Paper Mill ◽

Fame Analysis ◽

Pulp And Paper Effluent ◽

Biolog Gn

Carbon substrate utilization profiles, phenotypic fingerprints, of microbial communities from different pulp and paper effluent treatment systems are being determined using Biolog plates. The substrates from the Biolog GN plates that were deemed to be most significant in differentiating between communities are being employed as substrate panels on Biolog MT plates. Correlative microbiological tests including FAME analysis, heterotrophic plate counts, and epifluorescent microscopy are performed on the samples. By correlating the phenotypic fingerprints to pulp and paper mill processes and operation parameters in the treatment systems, the carbon substrate utilization profile has shown potential as a useful management tool.

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Modeling mass transfer and substrate utilization in the boundary layer of biofilm systems

Water Science & Technology ◽

10.2166/wst.1998.0603 ◽

1998 ◽

Vol 37 (4-5) ◽

pp. 139-147 ◽

Cited By ~ 6

Author(s):

Harald Horn ◽

Dietmar C. Hempel

Keyword(s):

Boundary Layer ◽

Mass Transfer ◽

Reynolds Number ◽

Film Theory ◽

Substrate Utilization ◽

The Other ◽

Concentration Profiles ◽

Hydrodynamic Conditions ◽

Time Axis ◽

Transfer Coefficients

The use of microelectrodes in biofilm research allows a better understanding of intrinsic biofilm processes. Little is known about mass transfer and substrate utilization in the boundary layer of biofilm systems. One possible description of mass transfer can be obtained by mass transfer coefficients, both on the basis of the stagnant film theory or with the Sherwood number. This approach is rather formal and not quite correct when the heterogeneity of the biofilm surface structure is taken into account. It could be shown that substrate loading is a major factor in the description of the development of the density. On the other hand, the time axis is an important factor which has to be considered when concentration profiles in biofilm systems are discussed. Finally, hydrodynamic conditions become important for the development of the biofilm surface when the Reynolds number increases above the range of 3000-4000.

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Acute and Chronic Effects of Antibiotics on Deterioration of Anaerobic Substrate Utilization

Current Organic Chemistry ◽

10.2174/1385272821666170117095645 ◽

2017 ◽

Vol 21 (12) ◽

pp. 1044-1053 ◽

Cited By ~ 1

Author(s):

Zeynep Cetecioglu ◽

Derin Orhon

Keyword(s):

Substrate Utilization ◽

Chronic Effects ◽

Acute And Chronic Effects

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Resolved phylogenetic relationships in the Ocotea complex ( Supraocotea ) facilitate phylogenetic classification and studies of character evolution

American Journal of Botany ◽

10.1002/ajb2.1632 ◽

2021 ◽

Vol 108 (4) ◽

pp. 664-679

Author(s):

Juan C. Penagos Zuluaga ◽

Henk Werff ◽

Brian Park ◽

Deren A. R. Eaton ◽

Liza S. Comita ◽

...

Keyword(s):

Phylogenetic Relationships ◽

Character Evolution ◽

Phylogenetic Classification

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Influence of Menstrual Cycle Estradiol-β-17 Fluctuations on Energy Substrate Utilization-Oxidation during Aerobic, Endurance Exercise

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18137209 ◽

2021 ◽

Vol 18 (13) ◽

pp. 7209

Author(s):

Hannah N. Willett ◽

Kristen J. Koltun ◽

Anthony C. Hackney

Keyword(s):

Menstrual Cycle ◽

Athletic Performance ◽

Luteal Phase ◽

Substrate Utilization ◽

Follicular Phase ◽

Exercise Session ◽

Future Research ◽

Physically Active ◽

Energy Substrate ◽

Fat Utilization

This study examined the effect of estradiol-β-17 across the menstrual cycle (MC) during aerobic exercise on energy substrate utilization and oxidation. Thirty-two eumenorrheic (age = 22.4 ± 3.8 y (mean ± SD)), physically active women participated in two steady-state running sessions at 65% of VO2max, one during the early follicular and one during the luteal phase of the MC. Blood samples were collected at rest before each exercise session and analyzed for Estradiol-β-17 to confirm the MC phase. Carbohydrate (CHO) utilization and oxidation values were significantly lower (p < 0.05) in the luteal (utilization: 51.6 ± 16.7%; oxidation: 1.22 ± 0.56 g/min; effect size (ES) = 0.45, 0.27) than follicular phase (utilization: 58.2 ± 15.1%; oxidation: 1.38 ± 0.60 g/min) exercise sessions. Conversely, fat utilization and oxidation values were significantly (p < 0.05) higher in the luteal (utilization: 48.4 ± 16.7%; oxidation: 0.49 ± 0.19 g/min; ES = 0.45,0.28) than follicular phase (utilization: 41.8 ± 15.1%; oxidation: 0.41 ± 0.14 g/min). Estradiol-β-17 concentrations were significantly (p < 0.01) greater during the luteal (518.5 ± 285.4 pmol/L; ES = 0.75) than follicular phase (243.8 ± 143.2 pmol/L). Results suggest a greater use of fat and reduced amount of CHO usage during the luteal versus follicular phase, directly related to the change in resting estradiol-β-17. Future research should investigate the role these changes may play in female athletic performance.

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Embryonic development of the fire-eye-tetra Moenkhausia oligolepis (Characiformes: Characidae)

Zygote ◽

10.1017/s0967199420000647 ◽

2021 ◽

pp. 1-5

Author(s):

Raquel Santos dos Santos ◽

Jeane Rodrigues Rodrigues ◽

Jhennifer Gomes Cordeiro ◽

Hadda Tercya ◽

Marissol Leite ◽

...

Keyword(s):

Embryonic Development ◽

Germ Cell ◽

Cell Transplantation ◽

Species Conservation ◽

Biotechnological Applications ◽

Model Species ◽

Phylogenetic Classification ◽

Laboratory Conditions ◽

Adhesive Surface ◽

Taxonomic Studies

Summary This study describes the embryonic development of Moenkhausia oligolepis in laboratory conditions. After fertilization, the embryos were collected every 10 min up to 2 h, then every 20 min up to 4 h, and afterwards every 30 min until hatching. The fertilized eggs of M. oligolepis measured approximately 0.85 ± 0.5 mm and had an adhesive surface. Embryonic development lasted 14 h at 25ºC through the zygote, cleavage, blastula, gastrula, neurula, and segmentation phases. Hatching occurred in embryos around the 30-somites stage. The present results contribute only the second description of embryonic development to a species from the Moenkhausia genus, being also the first for this species. Such data are of paramount importance considering the current conflicting state of this genus phylogenetic classification and may help taxonomic studies. Understanding the biology of a species that is easily managed in laboratory conditions and has an ornamental appeal may assist studies in its reproduction to both supply the aquarium market and help the species conservation in nature. Moreover, these data enable the use of M. oligolepis as a model species in biotechnological applications, such as the germ cell transplantation approach.

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