The energy-water nexus is a concept widely established but rarely applied to product and, in particular, to food and beverage products, which have a great influence on greenhouse gases emissions. The proposed method considers the main nexus aspects in addition to other relevant aspects such as climate change, which is deeply linked with energy and water systems, and assessing process as well as product. In this framework, this study develops an integrated index (IWECN) that combines life cycle assessment (LCA) and linear programming (LP) to assess energetic, water and climate systems, enabling the identification of those products with minors energetic and water intensity and climate change effects and helping to the decision-making process and to the development of eco-innovation measures. In this case, the product assessed was one bottle (70 cl) of gin and two main hotspots were identified: the production of the glass bottle and the energy requirements of the distillation stage. Based on that, several eco-innovation strategies were proposed: the use of photovoltaic solar energy as energy source and the substitution of the glass bottle by a plastic one and by a tetra brick. The nexus results indicated that the use of solar photovoltaic energy and plastic as bottle material was the best alternative decreasing 58% the IWECN value of the production of one bottle of gin. The sensitivity analysis presented a strong preference for photovoltaic solar energy in comparison with electric power and for the reduction of the glass bottle weight or its substitution by a plastic bottle. The use of the IWECN index is extendable to any product with the aim of facilitating the decision-making process in the development of more sustainable products to introduce them in new green markets. | Rubén Leivas thanks the Industrial Doctorates Program of the Cantabria University, the Santander Bank and the Ministry of Education, Culture and Sport by means of the Campus of International Excellence Program for the financial support. Jara Laso thanks the University of Cantabria for its financial support via the postdoctoral grant “Augusto Gonzalez Linares”. The authors are grateful for the funding of the Spanish Ministry of Economy and Competitiveness through the Ceres-Procom: Food production and consumption strategies for climate change mitigation (CTM2016-76176-C2-1-R).

Implementing effective resource management is crucial for urban sustainability. Potential resource management strategies should be assessed under the framework of a resource nexus to avoid problem shifting. The urban metabolism of food, energy, and water is driven by lifestyle, industrial structure, and infrastructure. This study employed material flow analysis to identify resource metabolism through the phases of supply, process, demand, and final sink. The resource intensity of urban activities and the risk of the nexus of resources were quantified to illuminate management strategies. This study investigated the food-energy-water nexus (FEW nexus) for a small and multi-sector island city, Kinmen, and found that the nexus risk of water for food is the highest. Water and energy consumption have excessive loads on resource metabolism in a multi-sector city, and the main demand sectors increase the nexus risk in water for food. The results indicated that higher risk results from higher resource consumption intensity, particularly in areas of economic growth. Resource management of the FEW nexus needs the best tradeoff strategy to meet the goals of urban metabolism sustainability. The risk assessment framework can support the design of optimal resource management strategies to pursue urban sustainability. Consequently, given the limitations of water treatment technology, the impact of energy risk mitigation is poor (below 4% of energy risk in 2015) and the energy risk will continue to increase (by about 10% based on the economic activity). As a result, imported water is the best tradeoff strategy to meet the FEW nexus safety for Kinmen City as a low-resource and sightseeing activity area.

The use of L-cysteine modified silver nanoparticles (Cys-capped AgNPs) as a colorimetric probe for determination of vitamin B1 (thiamine) is described in the present work. This method is based on the measurement of red shift of localized surface plasmon resonance (LSPR) band of Cys-capped AgNPs in the region of 200–800 nm. The color of Cys-capped AgNPs was changed from yellow to colorless by the addition of vitamin B1. The mechanism for detection of vitamin B1 is based on the electrostatic interaction between positively charged vitamin B1, which causes the red shift of LSPR band from 390 nm to 580 nm. The interaction between Cys-capped AgNPs and vitamin B1 was theoretically explored by density function theory (DFT) using LANL2DZ basis sets with help of Gaussian 09 (C.01) program. The morphology, size distribution and optical properties of Cys-capped AgNPs were characterized by transmission electron microscope (TEM), UV-Visible spectrophotometry, Fourier transform infrared spectroscopy (FTIR) and dynamic light scattering (DLS) techniques. The method is linear in the range of 25–500 μg mL⁻¹ with correlation coefficient (R²) 0.992 and limit of detection of 7.0 μg mL⁻¹. The advantages of using Cys-capped AgNPs as a chemical sensor in colorimetry assay are being simple, low cost and selective for detection of vitamin B1 from food (peas, grapes and tomato) and environmental (river, sewage and pond) water samples.

In this study, we investigated the tailoring of food emulsions using interactions between rice bran cellulose nanocrystals (CNCs) and lauric arginate (LAE), which is food-grade cationic surfactant. Complexes of anionic CNCs and cationic LAE (CNCs/LAE) were formed through electrostatic attraction which were characterized using isothermal titration calorimetry (ITC), turbidity, and zeta-potential measurements. The saturation complexes could be formed at ratios of 1:2 (w/w) CNCs-to-LAE. Furthermore, the physical and oxidative stability of oil-in-water emulsions containing lipid droplets coated by CNCs/LAE complexes was determined. Electrostatic complexes formed from 0.02% CNCs and 0.1% LAE produced stable Pickering emulsions that were resistant to droplet coalescence. It was also exhibited that 0.02% CNCs and 0.1% LAE complexes stabilized-emulsions was able to extend the lag phase to 20 days for lipid hydroperoxide and to 14 days for hexanal production. This study shows that food-grade Pickering emulsions with good stability can be produced by CNCs with LAE complexes.

Lead is a heavy metal with increasing public health concerns on its accumulation in the food chain and environment. Immunoassays for the quantitative measurement of environmental heavy metals offer numerous advantages over other traditional methods. ELISA and chemiluminescent enzyme immunoassay (CLEIA), based on the mAb we generated, were developed for the detection of lead (II). In total, 50% inhibitory concentrations (IC₅₀) of lead (II) were 9.4 ng/mL (ELISA) and 1.4 ng/mL (CLEIA); the limits of detection (LOD) were 0.7 ng/mL (ic-ELISA) and 0.1 ng/mL (ic-CLEIA), respectively. Cross-reactivities of the mAb toward other metal ions were less than 0.943%, indicating that the obtained mAb has high sensitivity and specificity. The recovery rates were 82.1%–108.3% (ic-ELISA) and 80.1%–98.8% (ic-CLEIA), respectively. The developed methods are feasible for the determination of trace lead (II) in various samples with high sensitivity, specificity, fastness, simplicity and accuracy.

Seven food-deprived rats were observed on a progressive-ratio 5 schedule of food reinforcement under baseline conditions and during concurrent access to tap water, a 1 % sucrose solution, or a 5 % sucrose solution. Subjects responded for the alternative reinforcer primarily during the preratio pause. Responding for the alternative reinforcer caused a local increase in pause durations in all conditions, however, the mean pause duration for the session increased only when the 5 % sucrose solution was available. Otherwise, the increase in pause durations that accompanied responding for the alternative reinforcer was offset by reducing pausing at other times. Access to the 5 % sucrose solution changed the relation of ratio size to pause duration in several subjects in that the longest pause durations occurred before the end of the session rather than when the highest ratios were in effect. Breakpoints were largely unaffected by alternative reinforcement.

The governance of the nexus between water, energy, and food (hereafter, ‘the nexus’) is permeated by complex interactions of knowledge at a science-policy-society interface. This paper starts from a literature review to find the main narratives that allow us to understand what is at stake in this interface. By thematically synthesising 19 select articles, we reached three layers of knowledge interaction: ‘knowledge application’, ‘knowledge integration’, and ‘knowledge transformation’. To avoid misleading simplifications, we discussed the constraints on this debate and some pressures for what we consider as ‘closing down’ knowledge about the nexus. We then developed a conceptual framework based on the ‘technologies of humility’ proposed by Jasanoff (2003, 2007) to create opportunities to ‘open up’ the nexus approach. Finally, we illustrated the four pillars proposed by some studies to describe what we have termed ‘nexus of humility’: framing, vulnerability, distribution, and learning. These foci seek to enable a humbler appreciation on all sides of the persistent sources of uncertainty, divergence, and conditionality in sustainability governance. This framework also contributes towards necessary transformations of knowledge about nexus and its challenging implementation.

Diarrhoeal disease in children under five in low income settings has been associated with multiple environmental exposure pathways, including complementary foods. Conducted from February to December 2018 in rural Malawi, this before and after trial with a control used diarrhoeal disease as a primary outcome, to measure the impact of a food hygiene intervention (food hygiene + handwashing) relative to a food hygiene and water, sanitation and hygiene (WASH) intervention (food hygiene + handwashing + faeces management + water management). The 31-week intervention was delivered by community-based coordinators through community events (n = 2), cluster group meetings (n = 17) and household visits (n = 14). Diarrhoeal disease was self-reported and measured through an end line survey, and daily diaries completed by caregivers. Difference-in-differences results show a 13-percentage point reduction in self-reported diarrhoea compared to the control group. There were also significant increases in the presence of proxy measures in each of the treatment groups (e.g., the presence of soap). We conclude that food hygiene interventions (including hand washing with soap) can significantly reduce diarrhoeal disease prevalence in children under five years in a low-income setting. Therefore, the promotion of food hygiene practices using a behaviour-centred approach should be embedded in nutrition and WASH policies and programming.

Climate change and increasing world population will directly impact the global food supply chain linkages. In the United States, agricultural production requires less irrigated water than before but it still accounts for a third of total water withdrawals. To better understand the evolution of its water use, we perform a structural decomposition analysis of water withdrawals across eight different crops and six livestock categories and differentiate the trends over 1995–2005 vs 2005–2010 to account for the role of the economic crisis in the second period. Based on USGS data, the results show that both periods experienced an overall decline in water withdrawals in the production of all crops except oilseeds. This trend is driven by a decrease in water intensity, reflecting greater efficiency of irrigation systems, and by reduced local per capita income in the second period. However, increased foreign demand for water-intensive sectors like oilseeds from NAFTA and Asian partners mitigated the decline. Results indicate also a decreasing water use in livestock production partially due to a shift from red to white meat consumption in the country. Arguably, recent tariff wars and border closures have greatly reduced the virtual water embodied in American exports.

Introduction: The potential impacts of climate change on water resources and food security are receiving growing attention especially in regions that face growing challenges like water demands for agricultural, domestic and environmental uses. The anticipated climate change are likely to impact water resources (surface water and groundwater) by altering precipitation patterns and change in nature of rainfall regimes. Apart from the effects on water availability, climate change is expected to adversely affect crop productivity, food security and food producers' income. Climate changes could affect the four dimensions of food security; food availability, access, utilization, and stability. Therefore, this study aims at investigating the economic effects of climate change on the agricultural sector (including the yield of crops, water resources, food security and profitability) in Hamadan-Bahar plain. The hypothesis tested in this research is that climate change has negative impacts on the agricultural sector in the study area and it is necessary to present solutions to reduce these effects. Accordingly, the question answered in this study is whether climate changes in the region reduces crop yields, the profitability of the agricultural sector, and aggravate the scarcity of water resources. For this purpose in this study, the effects of climate change in different scenarios on regional cultivation pattern, basic food cultivation pattern, gross profit of farmers, physical and economic productivity of water and food security in Hamedan-Bahar plain have been investigated and then various suggestions to these problems have been presented. Materials and Methods: For this purpose, the physiological, hydrological and meteorological aspects of the problem were integrated into an economic model and the changes in cultivation pattern of the plain were projected in counterfactual climatic scenarios. Accordingly, the outputs of the HadCM3 model under the scenarios of B1 (optimistic) and A2 (pessimistic) were utilized for the fourth report; additionally, the outputs of the ensemble model under RCP 2.6 (optimistic) and RCP 8.5 (pessimistic) scenarios were used for the fifth report of IPCC. Then, the variables of rainfall and temperature for the horizon of 2070 were predicted under scenarios B1, A2, RCP2.6 and RCP8.5 using the Lars-WG model. In this regard, the yield response functions of the products with respect to climatic parameters by the Generalized Maximum Entropy method (GME) were estimated and the elasticity of the yield of the products with regard to temperature and rainfall were calculated. Then products yield changes on the 2070 horizon under different climate change scenarios were predicted and by including it in a positive mathematical programming (PMP), the impact of different climate change scenarios on regional cultivation pattern, basic food cultivation pattern, gross profit of farmers, physical and economic productivity of water and food security were examined. To estimate the yield response regression model and predict climate changes by LARS_WG model, the data on the period 1982-1982 were used. Also the data and information of farmers were obtained using a two-stage cluster sampling method in 2018 (baseline). Results and Discussion: The results indicate an increase in temperature, a decrease in precipitation, a decrease in the supply of water resources, and consequently a decrease in the yield of most basic food products and an increase in the yield of some vegetable and summer crops were anticipated in all scenarios. The results also showed that the occurrence of the mentioned consequences has negative effects on the total production of crops, the amount of production of basic food products and the gross profit of farmers in the region. And in this regard, in the most pessimistic scenario on the horizon of 2070, it will impose a loss of 490 billion rials on farmers. The increase in the physical and economic efficiency of water in different scenarios shows that water is becoming more valuable due to the decrease in the quantity of water due to climate change. Therefore the economic value of water would increase in the future decades in Hamadan-Bahar plain, which itself represents the severity of water scarcity in the agricultural sector. Conclusion: The occurrence of climate change by affecting water resources, crop yields, cultivated area, food production and ultimately farmers' incomes, in addition to imposing economic and environmental losses, would affect various aspects of food security such as food availability, access, stability and utilization. Accordingly, in order to maintain and improve the yield of crops and reduce the possible losses imposed on income and food security of the region, it is vital to adopt appropriate strategies compatible with climate change, including the use of new irrigation technologies, deficit irrigation methods and to reform the cultivation pattern by selecting products with higher economic value in order that increase water productivity. Finally improving management of water resources and farmers' income at the plant, farm and region levels, is crucial.