2024 Effects of toxicants on chemostat models

Effects of toxicants on chemostat models

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August undefined, 2024

WebIn a chemostat, one can control the flow rate and maintain a constant substrate concentration, as well as provide continuous control of pH, temperature and oxygen levels. This allows control of the rate of growth, which can be used to optimize the production of specific microbial products. WebMar 15, 1999 · Population-toxicant coupling has been applied in several contexts, including Lotka–Volterra and chemostat-like environments, resulting in ordinary, integro-differential and stochastic models (see e.g. 4, 5, 8, 13). Usually a qualitative analysis was performed which focuses on the survival or extinction of populations (see e.g. [14]).

6.3: Bacterial Chemostat - Engineering LibreTexts

WebAug 27, 2024 · The results show that the stochastic noise, impulsive dredging, and pulse input on the environmental toxicant play important roles in the extinction of microorganisms. The results also indicate the effective and reliable controlling strategy for water resource management. Finally, numerical simulations are employed to illustrate our results. diseases related to insulin resistance

(PDF) Effects of toxicants on chemostat model with time variable ...

WebJan 13, 2016 · In the chemostat model, the micro-organism may be affected by distribution of nutrient, temperature, humidity, etc, which can be described by continuous white noise. ... Stochastic... WebThe effects of toxicants on naturally stable two-species communities are studied. Persistence-extinction thresholds are given for populations in the toxicant stressed Lotka-Volterra model of two interacting species. WebApr 1, 2009 · In this paper, we have investigated the model for a polluted chemostat with impulsive input. We have proved that microorganism eradication periodic solution is globally asymptotically stable if , which is showed in Fig. 1. We can see that the variables , oscillate in a stable periodical cycle, in contrast rapidly decrease to zero. diseases related to iodine deficiency

Effects of toxicants on chemostat model - CORE

DEVELOPMENT OF A MODEL TO PREDICT EFFECTS OF …

WebMar 1, 2008 · Enough conditions are obtained to guarantee the permanence of the system and extinction of the microorganism in the chemostat environment with a periodic nutrient and antibiotic input. A system of periodic coefficients functional differential equations is used to model the single microorganism in the chemostat environment with a periodic … WebToxicant. A toxicant is any toxic substance, whether man-made or naturally occurring. [1] By contrast, a toxin is a poison produced naturally by an organism [dubious – discuss] (e.g. … diseases related to geneticsWebFeb 1, 2004 · Most of these models focus on autonomous system. But in the real world, toxicants usually have influence on the demographic structure and on the spread … diseases related to protein

"WebThe results show that both impulsive toxicant input and stochastic noise have great effects on the survival and extinction of the microorganisms. Furthermore, a series of numerical simulations are presented to illustrate the performance of the theoretical results. " - Effects of toxicants on chemostat models

Effects of toxicants on chemostat models

A model for delayed effect of toxicant on resource-biomass system

WebHarrell E. Hurst, Michael D. Martin, in Pharmacology and Therapeutics for Dentistry (Seventh Edition), 2024 Chemically Related Toxicants. Understanding of chemical … WebThe effects of toxic substances on two microorganisms community in a polluted chemostat environment is studied. The stability analysis of the nonnegative equilibria has been performed. A threshold for the survival or the extinction of populations has ...

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WebThe influence of toxicants on the competition of n populations for time variable input rate and time variable washout rate in a Chemostat model is investigated. After … WebSalt marshes and seabird populations were hard hit, but were also quite resilient to oiling effects. Monitoring demonstrated little contamination of seafood. Certain impacts are still understudied, such as effects on seagrass communities. Concerns of long-term impacts remain for large fish species, deep-sea corals, sea turtles and cetaceans.

WebDec 12, 2015 · In the current work, we focus on the model electroactive microorganism Geobacter sulfurreducens to explore both the design of new start-up procedures and electrochemical operations. Our chemostat-grown plug and play cells, were able to reduce the start-up period by 20-fold while enhancing chemical oxygen demand (COD) removal … WebMar 11, 2024 · A chemostat has better productivity than a batch reactor. There is a higher rate of product per time per volume. A batch process wastes time. 2. A chemostat is …

WebDec 31, 1993 · Having an issue? Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after … WebSep 15, 2024 · Beretta et al. [8]supposed that the nutrient is partially recycled after the death of the organisms and used a distributed delay to model nutrient recycling. Ma [9]studied the effects on toxicants on the chemostat model with …

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WebThe aim is to find effects of toxicants on the structure and functioning of the ecosystem. The starting point is an unstressed ecosystem model for nutrients, populations, detritus … diseases related to protein misfoldingChemostats in research are used for investigations in cell biology, as a source for large volumes of uniform cells or protein. The chemostat is often used to gather steady state data about an organism in order to generate a mathematical model relating to its metabolic processes. Chemostats are also used as microcosms in ecology and evolutionary biology. In the one case, mutation/selection is a nuisance, in the other case, it is the desired process under study. Chem… diseases related to lupusWebinfluence the behavior of toxic trace metals. Metals associated with bacterial prey can be released into the dissolved phase following digestion by a predator, and/or metals can remain in the predator and potentially be transferred to the next level of the food chain. Toxic metal ions in the aqueous phase are also expected to modify the growth diseases related to rough erWebMar 24, 2024 · With the increase in toxicants in nature, more and more species are exposed to toxin environments and face the decrease in population densities. For example, industrial pollutants produced by human activities would reduce both growth and yield rates of endangered species, which may threaten their persistence. diseases related to osteoporosisWebNov 15, 2010 · If the spraying of agriculture chemicals can be regarded as time pulse discharge, the continuous input of toxin can be regarded discharged and replaced by an impulsive perturbations. In this case, though the discharge of toxin is transient, the influence of the toxin will last long. diseases related to protein metabolismWebJan 11, 2024 · This mathematical model's capability to find the population-level effects of toxicants might play a critical part in the accurate assessment of pollutants' risk to rivers … diseases related to obesityWebMar 9, 2011 · The dynamics of some algal allelopathic competitions taking place in a laboratory chemostat-like environment are analyzed. Our main results concern the global asymptotic stability of some biologically meaningful steady-state solutions and have been obtained by means of limiting systems theory and construction of suitable Liapunov … diseases related to malnutrition