A class of three level food chain system is studied. With the theory of delay equations and Hopf bifurcation, the conditions of the positive equilibrium un... Y Chen,J Yu,C Sun - 《Chaos Solitons & Fractals》 被引量: 106发表: 2007年 Hopf bifurcation in three-species food chain models ...
The prey to predator ratio-dependent functional response models can be generalized for the ith species in a trophic chain as follows:dXidT=fiXi−1Xici−ziXi−fi+1XiXi+1Xi+1,where fi(·) is the functional response of species i to the per-capita availability of its food supply in the...
This is especially interesting for the meat, fish, and dairy sector studied here, as the animal product supply chain is at particular risk of food fraud when compared to businesses in other supply chains (van Ruth & Nillesen, 2021). A recent study found that food fraud case detection was ...
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Trade restrictions, supply chain disruptions, and logistics disturbances following the onset of the COVID-19 pandemic resulted in an unstable food supply [2]. In-country lockdowns and measures attempting to control the COVID-19 virus have also adversely affected food access, shopping habits, and...
according to previous research. These by-products can be successfully incorporated into food items since they are high in bioactive ingredients. In this approach, the waste mimics the ecological burden and is reintroduced into the food chain. The bioactive food products that have been produced as ...
Supply chain You need ingredients in order to sell food. But where will you get them? Let’s look at your options. Restaurant wholesalers Example: Sysco Pros: Reliable and cost effective Cons: Large volume-packaged products could be hard to store on your truck Wholesale clubs Example: Costco...
. Food waste upcycling. Food consumption and discard is no longer viewed in isolation, but is increasingly linked to its environmental, social, health and economic impact. With a third of all food produce wasted, techn...
By pinpointing the drivers of changes in global food trade, such as price spikes and volatility, supply chain disruptions, and shifts in consumer demand, it becomes possible to anticipate and mitigate the adverse impacts of food insecurity, poverty, and environmental degradation. For example, trade...
Regarding the amino substituent, neither the prolongation or removal of the alkyl chain or the carboxy function in the 1-(1-carboxy-2-ethyl)-moiety, nor the incorporation of an additional ca 展开 关键词: Alapyridaine 1-(1-Carboxyethyl)-5-hydroxy-2-(hydroxymethyl)-pyridinium inner salt ...