Search Results (111)

A three-year optimization study was conducted at a mechanical biological treatment plant with the aim of enhancing organic fractions recovery from mechanically separated fine fractions (MSFF) of residual waste using a screw press. The study aimed to optimize key operating parameters for the employed screw press, such as pressure, liquid-to-MSFF, feeding quantity per hour, and press basket mesh size, to enhance volatile solids and biogas recovery in the generated press water for anaerobic digestion. Experiments were performed at the full-scale facility to evaluate the efficiency of screw press extraction with other pretreatment methods, like press extrusion, wet pulping, and hydrothermal treatment. The results indicated that hydrolysis of the organic fractions in MSFF was the most important factor for improving organic extraction from the MSFF to press water for fermentation. Optimal hydrolysis efficiency was achieved with a digestate and process water-to-MSFF of approximately 1000 L/ton, with a feeding rate between 8.8 and 14 tons per hour. Increasing pressure from 2.5 to 4.0 bar had minimal impact on press water properties or biogas production, regardless of the press basket size. The highest volatile solids (29%) and biogas (50%) recovery occurred at 4.0 bar pressure with a 1000 L/ton liquid-to-MSFF. Further improvements could be achieved with longer mixing times before pressing. These findings demonstrate the technical feasibility of the pressing system for preparing an appropriate substrate for the fermentation process, underscoring the potential for optimizing the system. However, further research is required to assess the cost–benefit balance. Full article

Fermentation is a fundamental technique that allows us to obtain high-quality cacao beans and derived products. Therefore, it is necessary to apply fermentation correctly to maximize product quality. Fermentation techniques vary by region and include piles, trays, wooden boxes, baskets, and platforms. During these processes, several factors influence the physicochemical and sensory characteristics of cacao beans. The factors that influence these characteristics are the frequency of turning, the genotype of the bean, and the duration of fermentation. This review aims to explore how the fermentation method, turning frequency, bean genotype, and fermentation duration affect the physicochemical and sensory qualities of cacao beans. To this end, an exhaustive search for recent information on the most commonly used fermentation methods in cacao-producing countries over the last 10 years was carried out. The fermentation method in wooden boxes or crates is the most commonly used method worldwide. The most common turning frequency is 24 or 48 h, which is considered the most suitable time for obtaining cacao beans with better sensory attributes, such as floral and fruity aromas, and a lower level of acidity. Finally, a relationship was found between the genotype and the optimal fermentation time of cacao: about 4 days for Criollo cacao, approximately 5 days for Forastero cacao and between 1.5 and 10 days for Trinitario cacao. Full article

Background/Objectives: Addressing the global syndemic of obesity, undernutrition, and climate change requires a shift toward healthy and sustainable diets. This study examines the feasibility and cost implications of implementing a Healthy and Sustainable Basic Food Basket in Chile that aligns with the EAT–Lancet diet recommendations, through its comparison with the current Basic Food Basket used for the poverty line definition. Methods: The Healthy and Sustainable Basic Food Basket was constructed based on the EAT–Lancet dietary model and was uniquely adapted to reflect the observed consumption patterns of Chile’s lowest income quintile, allowing for a more realistic affordability assessment for vulnerable populations. Food prices from the National Institute of Statistics were analyzed over a 10-year period (2014–2023). Results: This study found that the Healthy and Sustainable Basic Food Basket provides 2001 kcal per day with a balanced macronutrient distribution. However, its average cost was 13.9% higher than the Basic Food Basket, posing a significant economic barrier for low-income populations. The cost gap varied seasonally, peaking in October (21.1% higher) and narrowing in December (4.6% higher). Long-term trends showed increasing costs for both baskets, with the Healthy and Sustainable Basic Food Basket reaching its highest price in 2023, further limiting affordability. Conclusions: These findings highlight the limitations of current poverty measurement frameworks in Chile, which prioritize caloric sufficiency over nutritional quality and sustainability. This suggests a need for policy revisions to incorporate the cost of healthy and sustainable diets into poverty assessments and social protection programs. Key policy recommendations include promoting healthier diets and improved food nutrition, supporting low-carbon foods, regulating local food production and supply systems, and encouraging seasonal, local consumption. This study underscores the need for structural interventions to ensure equitable access to sustainable diets, addressing both public health and environmental concerns. Full article

Exchange rate volatility has emerged to be one of the most critical determinants of price stability for countries operating in multicurrency systems with their own currency in the basket of currencies. This study empirically examined the impact of exchange rates (official and parallel market rates) on inflation in Zimbabwe during the multicurrency system for the period 2014 to 2024, together with comparing the impacts of the official and parallel market exchange rates on inflation. Time series and monthly data were used to examine the short and long run impact of exchange rates on inflation in an ARDL estimation framework. Findings revealed a short run and long run positive relationship between both the official and parallel market exchange rates and inflation, with the parallel market exchange rate being the most significant variable. Other control variables used, such as domestic productivity, have a highly significant negative impact on inflation through the official and parallel exchange rate models in both the short and the long run. Money supply, real interest rate, trade balance, foreign prices, foreign output, stock market prices and foreign currency reserves have varied impacts through either the official or parallel market exchange rate models. Policy recommendations include a contractionary Monetary and expansionary Fiscal policy mix that will result in exchange rate appreciation and stability, productivity growth, trade surplus, growth in reserves, and ultimately low prices. The exchange rate policy recommended in this study is to shelve discard the local currency in the multicurrency system until industrial capacity utilization exceeds 50% to add the local currency to the basket of currencies and 75% for mono-local currency (de-dollarization). Full article

A copolymer of 3-hydroxybutyrate (3HB) and 3-hydoxyhexanoate (3HHx), PHBHHx, is a practical biodegradable plastic, and at present, the copolymer is produced at commercial scale via heterotrophic cultivation of an engineered strain of a facultative hydrogen-oxidizing bacterium, Cupriavidus necator, using vegetable oil as the carbon source. In our previous report, we investigated PHBHHx production from CO₂ via pH-stat jar cultivation of the newly created recombinants of C. necator under autotropic conditions, feeding the inorganic substrate gas mixture (H₂/O₂/CO₂ = 80:10:10 v/v%) into a recycled-gas closed-circuit (RGCC) culture system. The dry cell weight (DCW) and PHBHHx concentration with the best strain MF01/pBPP-ccr_MeJ_Ac-emd increased to 59.62 ± 3.18 g·L⁻¹ and 49.31 ± 3.14 g·L⁻¹, respectively, after 216 h. In this study, we investigated the high-concentration production of PHBHHx with a shorter cultivation time by using a jar fermenter equipped with a basket-shaped agitator to enhance oxygen transfer in the culture medium and by continuously supplying the gases with higher O₂ concentrations to maintain the gas composition within the reservoir at a constant ratio. The concentrations of ammonium and phosphate in the culture medium were maintained at low levels. As a result, the DCW and PHBHHx concentrations increased to 109.5 ± 0.30 g·L⁻¹ and 85.2 ± 0.62 g·L⁻¹ after 148 h, respectively. The 3HHx composition was 10.1 ± 0.693 mol%, which is suitable for practical applications. Full article

Background/Objectives: This study aimed to evaluate the degradation of omeprazole suspension under various pH conditions and to propose recommendations for preparing compounded suspensions. Given the clinical need for alternative dosage forms for pediatric and geriatric patients and those with dysphagia, the research focused on assessing whether modifications in formulation composition—specifically the inclusion of sodium bicarbonate—could improve omeprazole stability, thus enhancing its bioavailability. Methods: Three formulations were prepared: O1, based on crushed enteric-coated pellets from a commercial product; O2, with crushed pellets suspended in an 8% sodium bicarbonate solution with glycerin; and O3, with pure omeprazole suspended in an 8% sodium bicarbonate solution with glycerin. Release studies were conducted using basket or paddle apparatus under conditions simulating fasted (pH 1.2 and 6.8) and fed (pH 6, 4.5, and 3) gastric and intestinal juices at 37 °C over 120 min. At predetermined intervals, samples were withdrawn and analyzed by a validated HPLC method with UV detection to quantify the released omeprazole. Results: The commercial enteric-coated product showed no release at a low pH, confirming its protective coating. In contrast, formulation exhibited significant degradation in acidic environments. The O2 formulation, benefiting from the buffering effect of sodium bicarbonate, showed improved stability compared to O1. Notably, formulation O3 yielded the highest drug recovery, with approximately 74% released at pH 6 and 65% at pH 6.8, demonstrating significantly better performance, as confirmed by statistical analysis (p < 0.05). Conclusions: The composition of omeprazole suspensions substantially influences the drug stability and release profiles. The O3 formulation, based on pure omeprazole with sodium bicarbonate, is recommended for immediate-release suspensions to enhance bioavailability. Further studies are needed to optimize conditions for pediatric use. Full article

Current food systems provide relative food security but compromise planetary health and largely fail to address climate change challenges. Regional food supplies can contribute to sustainable production and consumption, reducing the dependence on global supply chains. However, food systems’ complexity and rigidity hinder the implementation of climate-conscious, healthier practices. The City.Food.Basket project explored regional food baskets in urban and peri-urban settings in Austria for the City of Graz and its surroundings, developing models for regional, healthy, and low-climate-impact diets. Against this background, we present a qualitative study that generated three explorative scenarios for promoting regional diets using a Delphi-based expert-stakeholder survey method with participatory elements. A scenario workshop elaborated on interconnecting actions to strengthen regional food supply, including making regional food a tender criterion, reducing waste, ensuring affordability, and shifting subsidies to climate-conscious practices for Graz. While the method successfully provides socio-technical futures for policy orientation, its direct policy impact remains low due to time constraints, short project duration, limited project resources, and differing rationalities between research and policymaking. This study highlights the need for improved connectivity between transdisciplinary research, foresight methods, and regional policy cycles to enhance such projects’ effectiveness. Full article

The stability of a backfill roof is critical to ensure safe production in underhand drift-and-fill mining. In this method, the basket weave drift layout is widely accepted. However, there is currently limited research on the displacement distribution and strength requirement of the backfill roof with this drift layout. To address the gap, a three-dimensional numerical model was established with FLAC3D, with the Maoping Lead–Zinc Mine as the engineering background, to investigate the stability of a backfill roof with the basket weave drift layout. In numerical simulations, an iterative search method was applied to determine the strength requirements of the backfill roof. The results show that the displacement of the backfill roof with the basket weave drift layout shows columnar or strip-like distribution patterns. The strength requirements (unconfined compressive strength) of the backfill roof in limited equilibrium for drift sizes of 3.5 m × 3.0 m, 4.5 m × 4.0 m, and 5.5 m × 5.0 m were determined to be 1.34 MPa, 1.57 MPa, and 2.38 MPa, respectively. A comparison was also made between the strength requirement predicted by traditional analytical solutions and those obtained from numerical simulations, which shows that traditional solutions tend to yield conservative results. The method and analysis process employed in this study can provide valuable references for backfill strength design in mines using underhand drift-and-fill mining. Full article

This study evaluated the impact of different fermentation boxes on the nutritional and antioxidant composition of dried lowland cocoa beans (Theobroma cacao L.), a characteristic product of some producers in the Amazon region. The analysis included ash content, moisture content, pH, titratable acidity, proteins, lipids, flavonoids, antioxidant activities (DPPH, ABTS, and FRAP), and mineral composition. Four types of fermentation boxes were assessed: a projected hexagonal box (PHB), square box (SB), basket (HP), and local square box (LSB). Statistical analyses included ANOVA, Tukey’s test, and Fisher’s LSD test to compare mean differences, while Principal Component Analysis (PCA) identified key contributors, including potassium and magnesium. Spearman correlation analysis revealed significant relationships between soil and almond nutrient profiles. The HP bed exhibited superior phenolic concentration, antioxidant activity, centesimal composition, and potassium and magnesium content. Despite its shorter fermentation period, the LSB bed met quality standards, while the PHB and SB showed intermediate results. Mineral analysis confirmed no toxicological risks, suggesting the beans are safe and enriched with floodplain minerals. These findings emphasize the importance of fermentation methods in determining cocoa bean quality and provide a framework for optimizing processes to enhance their nutritional and functional properties. Full article

Asian Mega-Deltas (AMDs) are important food baskets and contribute significantly to global food security. However, these areas are extremely susceptible to the consequences of climate change, such as rising temperatures, sea-level rise, water deficits/surpluses and saltwater intrusion. This study focused on maize crop suitability mapping and yield assessment in two major AMDs: the Ganges Delta, spanning parts of northeast India and Bangladesh, and the Mekong Delta across Vietnam and Cambodia. We investigated the historical climate reanalysis AgERA datasets and climate projections from the Coupled Model Intercomparison Phase 6 (CMIP6) for the periods 2040–2070 and 2070–2100 using PyAEZ-based modeling to estimate maize yields for periods in the near (2050s) and far future (2100s). Province-level yield estimates were validated against statistics reported by the governments of the respective countries. Model performance varied across regions, with R² values ranging from 0.07 to 0.94, MAE from 0.67 t·ha⁻¹ (14.2%) to 1.56 t·ha⁻¹ (20.7%) and RMSE from 0.62 t·ha⁻¹ (14.6%) to 1.74 t·ha⁻¹ (23.1%) in the Ganges Delta, and R² values from 0.23 to 0.85, MAE from 0.37 t·ha⁻¹ (12.8%) to 2.7 t·ha⁻¹ (27.2%) and RMSE from 0.45 t·ha⁻¹ (15.9%) to 1.76 t·ha⁻¹ (30.9%) in the Mekong Delta. The model performed comparatively better in the Indian region of the Ganges Delta than in the Bangladeshi region, where some yield underestimation was observed not accurately capturing the increasing upward trend in reported yields over time. Similarly, yields were underestimated in some provinces of the Mekong Delta since 2008. This may be attributed to improved management practices and the model’s inability to fully capture high-input management systems. There are also limitations related to the downscaling of CMIP6 data; the yield estimated using the downscaled CMIP6 data has small variability under rainfed and irrigated conditions. Despite these limitations, the modeling approach effectively identified vulnerable regions for maize production under future climate scenarios. Additionally, maize crop suitability zones were delineated, providing critical insights for planning and policy design to support climate adaptation in these vulnerable regions. Full article

South African farming households face several challenges regarding food security, poverty, micronutrient deficiencies and hidden hunger. This is due to millions of households lacking access to food and an adequate food basket. Consumption of indigenous crops has been proposed to help sustain vulnerable households since these crops have low production costs and are climate-resilient. However, research has found the consumption of these crops across South Africa to be relatively low. This study aims to examine the factors associated with the consumption of indigenous crops among farming households in the KwaZulu-Natal province of South Africa. A sample of 260 farming households was selected using simple random sampling. The results showed that farmers commonly cultivate exotic crops, such as spinach, cabbage, carrot, and butternut, more than any indigenous crops, except for a few cultivating taro and sweet potato. The binomial logit regression results revealed that an increase in the number of females and children within a household and farmers’ experience increased the likelihood of consuming indigenous crops, whilst monthly food expenses decreased the likelihood of consuming indigenous crops. There is a considerable gap between the consumption and production of indigenous crops. The findings established that although many farming households indicated that they consume indigenous crops, this was not reflected in their cultivated crops. The study also concluded that farming households may be more aware of the nutritional benefits of indigenous crops, since an increase in the number of children in a household was linked to an increase in consumption of these crops. Additionally, experience in farming is vital, as it increases the consumption of indigenous crops. The study recommends government interventions that include increasing the production of indigenous crops by including them alongside the cultivation of exotic crops. Future work should also focus on awareness programs to promote the nutritional benefits of consuming indigenous crops. This, coupled with training centered on indigenous crops, could incentivize farming households to cultivate more of these crops for easier access. Full article

Neglected and Underutilized Species (NUS)—locally available, climate-resilient species—possess significant nutritional, social, and environmental benefits, yet their use, research focus, and market presence have diminished over time. Incorporating NUS into school meal programs can potentially boost childhood nutrition, promote healthy eating, encourage sustainable food production, preserve food culture and heritage, and support biodiversity conservation. School meals offered in Kenya are often monotonous and nutritionally inadequate. We conducted a case study on a school in an informal urban settlement in Nairobi, targeting students between ages 6–12, to demonstrate how incorporating locally grown, nutrient-dense foods into school meals can result in better nutrition for school-age children, while making significant savings for schools. Using the World Food Programme’s School Meal Planner (SMP) PLUS software, the school meals offered were analyzed for nutrient adequacy and optimized including five NUS: African nightshade (Solanum spp.), spider plant (Cleome gynandra), Bambara groundnut (Vigna subterranea), bonavist or hyacinth bean (Lablab purpureus), and slender leaf (Crotalaria spp.). The optimization process was based on the commodity price fluctuations and nutrient composition of the local agrobiodiversity used. The study results show how NUS are a viable and healthy alternative to meet the recommended daily nutrient needs for school-aged children at affordable prices. The tool results showcased the effectiveness of linear programming in enabling national decision making for efficient school feeding program planning, by designing comprehensive, affordable food baskets using local agrobiodiversity. Future research should explore implementing optimized school menus while examining broader aspects, such as school lunch environmental impacts and direct procurement approach opportunities that source local ingredients from smallholder farmers. Full article

Coastal countries’ productive capabilities are significantly influenced by the structure, dynamics, and evolution of marine products. In this study, we examined the market development dynamics of marine products across 156 coastal countries from 1995 to 2021, utilizing product space and economic complexity frameworks. We constructed and analyzed the product space of 106 marine products across six major marine industries, investigating the positioning and potential of various coastal countries within this space over three decades. The key findings were as follows: (1) global marine product exports exhibited substantial growth and increased geographical diversification. (2) The marine product space exhibited a core–periphery structure, with high-complexity marine shipbuilding products at the core and resource-based primary products at the periphery. (3) Coastal countries’ positions in the product space could be clustered into four distinct types: (i) complex diversified economies with constrained development potential, (ii) developed and industrialized countries with coexisting complexity and diversification, (iii) small island and developing countries with coexisting specialization and potential, and (iv) single-resource-dependent countries in the Middle East and Gulf of Guinea in Africa. (4) Each type faced unique development opportunities and challenges. We recommend that all economies continually leverage their comparative advantages in complex products. Specifically, type (i) and (ii) countries should focus on strengthening inter-product technological and knowledge networks and developing more integrated industrial chains. Type (iii) and (iv) countries should capitalize on their resources and geographical advantages to develop new, more complex products that align closely with their existing product baskets. Full article

The agricultural sector faces significant pressure to meet the growing global demand for food while managing the planet’s limited natural resources. Addressing this challenge requires the strategic use of abundant materials and accessible biotechnologies that farmers can effectively implement. This study evaluated the effects of various substrate mixtures, including combinations of coconut fiber with compost or vermicompost (50:50 v/v). It also assessed the impact of heat treatment and inoculation with the antagonist Trichoderma asperellum on the production of basic potato seeds grown in 70 L plastic baskets. Statistical analysis revealed that the vermicompost-based mixture outperformed others, demonstrating superior biometric variables for potato plants. The treatment with sterilized vermicompost led to a 41% increase in seed weight, underscoring the beneficial effects of vermicompost. Correlation analysis indicated a positive relationship between the phosphorus content of the mixture and a negative relationship with the E4/E6 ratio—a parameter recognized as a reliable and easily measurable indicator of substrate quality, along with pH and electrical conductivity. Full article

Background/Objectives: The goal of childhood obesity treatment is to benefit the physical and mental health of children who suffer from it and to prevent complications, improving their quality of life and ensuring adequate development. Family-based interventions are demonstrating positive results, especially in prepubertal children. The aim of our study was to evaluate the effectiveness of a family grocery basket intervention for the treatment of childhood obesity in a Spanish primary care office. Methods: A randomized controlled trial comparing a family grocery basket intervention through the analysis of unhealthy products included in the grocery receipts that families bring to the primary care office, in comparison with the usual interventions. Results: Ninety-one children participated in the study (intervention group: n = 60, control group: n = 31). After one year of follow-up, a relevant weight loss with a decrease of ≥0.5 SDS in the z-IMC was obtained in 60.6% of the total sample. In the intervention group, there was a significant decrease in the number of unhealthy products in the family grocery basket and a lower percentage of hypertension and severe obesity than in the control group. In families in which there was a significant decrease in the consumption of unhealthy products, a higher percentage of weight loss was observed. Conclusions: Intervention in the family grocery basket through receipts is an original, simple and effective tool for family-based treatment in childhood obesity. Full article