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Food waste is a pressing global concern with profound economic, environmental, and social implications. This paper explores strategies to mitigate food waste across the food supply chain, from production to consumption. We delve into innovative technologies, policy interventions, and behavioral changes aimed at reducing food waste. Additionally, we address the challenges and complexities of food waste reduction efforts, including the need for systemic changes and the role of consumer behavior. Five subheadings, spanning topics such as food recovery, circular economy approaches, and sustainable agriculture, provide a comprehensive overview of the multifaceted issue of food waste. This paper underscores the urgency of addressing food waste as an integral part of building sustainable food systems for the future.
Food waste is a pressing global concern with profound economic, environmental, and social implications. This paper explores strategies to mitigate food waste across the food supply chain, from production to consumption. We delve into innovative technologies, policy interventions, and behavioral changes aimed at reducing food waste. Additionally, we address the challenges and complexities of food waste reduction efforts, including the need for systemic changes and the role of consumer behavior. Five subheadings, spanning topics such as food recovery, circular economy approaches, and sustainable agriculture, provide a comprehensive overview of the multifaceted issue of food waste. This paper underscores the urgency of addressing food waste as an integral part of building sustainable food systems for the future.
Food allergies have become a significant public health concern, affecting millions worldwide. This comprehensive review explores the multifaceted nature of food allergies, shedding light on the intricate interplay of biological and chemical factors. We delve into the mechanisms of allergen recognition and sensitization, genetic predisposition, and the role of the gut microbiome. Moreover, we examine the influence of food processing techniques, additives, and cross-reactivity in the development and severity of food allergies. Food allergies, an adverse health condition triggered by the immune system's hypersensitivity to certain food proteins, have been rising globally, affecting millions of individuals and posing significant public health challenges. This comprehensive review explores the biological and chemical factors influencing the development, manifestation, and management of food allergies. Key biological factors include genetic predisposition, age, and immune system interactions, such as the roles of immunoglobulin E (IgE) and non-IgE mediated responses. Additionally, microbiota composition and environmental exposures during critical windows of immune development are examined. Chemical factors encompass the molecular structure of allergens, food processing methods, and the presence of food additives and contaminants. Advances in diagnostic techniques, such as component-resolved diagnostics and epitope mapping, along with emerging therapies like immunotherapy and biologics, are discussed. The review emphasizes the need for interdisciplinary approaches integrating molecular biology, immunology, and environmental science to develop effective prevention and treatment strategies. Understanding these complex interactions is crucial for reducing the burden of food allergies and improving the quality of life for affected individuals.
We investigate the following fractional p-Laplacian convex-concave problem: ( P λ ) ( − Δ ) p s u = λ | u | q − 2 u + | u | p s * − 2 u in Ω , u = 0 in R n \ Ω , $$\left({P}_{\lambda }\right) \begin{cases}\begin{aligned}\hfill {\left(-{\Delta}\right)}_{p}^{s}u& =\lambda \vert u{\vert }^{q-2}u+\vert u{\vert }^{{p}_{s}^{{\ast}}-2}u\hfill & \hfill & \quad \text{in} {\Omega},\hfill \\ \hfill u& =0 \hfill & \hfill & \quad \text{in} {\mathbb{R}}^{n}{\backslash}{\Omega},\hfill \end{aligned}\quad \hfill \end{cases}$$ where Ω is a bounded C 1,1 domain in R n ${\mathbb{R}}^{n}$ , s ∈ (0, 1), p > q > 1, n > sp, λ > 0, and p s * = n p n − s p ${p}_{s}^{{\ast}}=\frac{np}{n-sp}$ is the critical Sobolev exponent. Our analysis extends classical works (A. Ambrosetti, H. Brezis, and G. Cerami, “Combined effects of concave and convex nonlinearities in some elliptic problems,” J. Funct. Anal., vol. 122, no. 2, pp. 519–543, 1994, B. Barrios, E. Colorado, R. Servadei, and F. Soria, “A critical fractional equation with concave-convex power nonlinearities,” Ann. Inst. Henri Poincare Anal. Non Lineaire, vol. 32, no. 4, pp. 875–900, 2015, J. García Azorero, J. Manfredi, and I. Peral Alonso, “Sobolev versus Hölder local minimizer and global multiplicity for some quasilinear elliptic equations,” Commun. Contemp. Math., vol. 2, no. 3, pp. 385–404, 2000) to fractional p-Laplacian. Owing to the nonlinear and nonlocal properties of ( − Δ ) p s ${\left(-{\Delta}\right)}_{p}^{s}$ , we need to overcome many difficulties and apply notably different approaches, due to the lack of Picone identity, the stability theory, and the strong comparison principle. We show first a dichotomy result: a positive W 0 s , p ( Ω ) ${W}_{0}^{s,p}\left({\Omega}\right)$ solution of (P λ ) exists if and only if λ ∈ (0, Λ] with an extremal value Λ ∈ (0, ∞). The W 0 s , p ( Ω ) ${W}_{0}^{s,p}\left({\Omega}\right)$ regularity for the extremal solution seems to be unknown regardless of whether s = 1 or s ∈ (0, 1). When p ≥ 2, p − 1 < q < p and n > s p ( q + 1 ) q + 1 − p $n{ >}\frac{sp\left(q+1\right)}{q+1-p}$ , we get two positive solutions for (P λ ) with small λ > 0. Here the mountain pass structure is more involved than the classical situations due to the lack of explicit minimizers for the Sobolev embedding, we should proceed carefully and simultaneously the construction of mountain pass geometry and the estimate for mountain pass level. Finally, we show another new result for (P λ ) and all p > q > 1: without sign constraint, (P λ ) possesses infinitely many solutions when λ > 0 is small enough. Here we use the Z 2 ${\mathbb{Z}}_{2}$ -genus theory, based on a space decomposition for reflexible and separable Banach spaces, which has its own interest.
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