Effects of toxicants on chemostat models

Author: exts

August undefined, 2024

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 … WebApr 30, 2009 · The effects of toxicant on the resource-biomass is sometimes greater than the consumer species. It may lead to depletion of resources such as forestry and fertile crop land, and in extreme cases the extinction of species may also occur affecting the bio-diversity of the ecosystem.

Extinction and permanence of chemostat model with pulsed input …

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. WebApr 1, 2009 · The waste water with toxicant is always input impulsively to a ecological environment. Afterwards, population models with impulsive toxicant input were further researched [14,19,20, 25].... chanel order tracking

Chemostat - Wikipedia

WebMar 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. WebFeb 1, 2004 · These kinds of toxicant are generated by polluted biological (e.g., degradation of forests, Creutzfeldt-Jakob disease result from bovine spongiform encephalopathy (BSE)), physical (e.g., nuclear... 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. … chanel o phone holder with chain

(PDF) On the Study of Chemostat Model with Pulsed Input

(PDF) On the Strategy of "Eating Your Competitor": A …

WebNCI's Dictionary of Cancer Terms provides easy-to-understand definitions for words and phrases related to cancer and medicine. WebAug 1, 2009 · Theoretical models that examine the environmental fate of a toxicant are available but few mathematical models have been developed that are concerned with … hard camper shell for toyota tundraWebApr 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. hard camper shell for nissan frontier

"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. " - Effects of toxicants on chemostat models

Effects of toxicants on chemostat models

Extinction and permanence of chemostat model with pulsed input …

WebMar 20, 2013 · Theoretical models that examine the environmental fate of a toxicant are available but few mathematical models have been developed that are concerned with the effects of a toxicant on an ecosystem. 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.

Did you know?

WebOct 24, 2024 · For the statistical properties of the stochastic model, we mainly investigate the effect of white noise on the variance and skewness of the concentration of microorganisms. Keywords: stochastic chemostat … Chemostats 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…

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 …

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. WebApr 10, 2007 · Chemostat model with pulsed input in a polluted environment is considered. By using the Floquet theorem, we find that the microorganism eradication periodic solution is globally asymptotically ...

WebNov 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.

WebHarrell E. Hurst, Michael D. Martin, in Pharmacology and Therapeutics for Dentistry (Seventh Edition), 2024 Chemically Related Toxicants. Understanding of chemical … chanel optical glasses ukWebThe 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 proving some qualitative properties of the solutions, the threshold between hard candied plastic spoonsWebThe effects of toxic substances on two microorganisms community in a polluted chemostat environment is studied. The stability analysis of the nonnegative equilibria has been … hard c and soft cWebThe 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 ... hard calloused feetWebIn 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. hard c and soft c pdfWebFeb 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 … chanel original handbagsWebJan 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... chanel orthopedic sandals