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[学术文献 ] Rapid and cost-effective detection of perchlorate in water using paper-based analytical devices 进入全文
Desalination and Water Treatment 期刊
This study aimed to develop and evaluate the performance of a microfluidic paper-based device for measuring perchlorate levels in water samples. Smartphone-based digital imaging was integrated with microfluidic paper-based analytical device to establish a reliable colorimetric method for detecting perchlorate contamination. The results demonstrated successful quantitative estimation of perchlorate levels in water samples using a colorimetric assay based on the methylene blue-perchlorate reaction. Real-time, on-site colorimetric data were collected using a digital smartphone, and image processing methods were used to detect the occurrence of perchlorate in water samples from digital images. The developed approach yielded a broad linear response ranging from 4 to 12 μg/L (R2 = 0.97) for perchlorate detection, with a limit of detection of 3.41 μg/L and a limit of quantification of 10.34 μg/L. The findings underscore the effectiveness of colorimetric analysis and digital imaging for paper-based analytical devices. The limitations of this method include the capability to detect only a single analyte and the requirement for additional steps in image processing to obtain analytical results. Future developments should focus on designing devices for simultaneous detection of multiple contaminants and exploring automated methods of image analysis.
[学术文献 ] Analysis and electroanalysis of perchlorate in water and food samples: a critical review 进入全文
Analytical Methods 期刊
Perchlorate, ClO4−, with diverse applications, has become one of the major contaminants in surface and groundwater sources. This highly soluble and stable anion poses a considerable threat to human health given that it contaminates drinking water, vegetables, milk, and other contaminated food products. ClO4− can impair the thyroid function; thus, drinking water with high levels of this anion is a severe problem worldwide. However, due to the high solubility, stability, and mobility of ClO4−, its remediation and monitoring remain a major challenge. Considering the various analytical methods, including electrochemistry, each method has advantages and disadvantages in terms of detection sensitivity, selectivity, analysis time, and cost. Also, sample preconcentration and clean-up must be performed for the analysis of more complex matrices such as food and biological samples to ensure a low detection limit and selectivity. Both ion chromatography (IC) and capillary electrophoresis (CE) coupled with electrochemical detection, in addition to liquid chromatography (LC)-mass spectrometry (MS), are expected to play key roles due to their lower detection limit with excellent sensitivities and selectivity. Herein, we also discuss the perspective on various electrode materials for the detection of ClO4− regarding whether ClO4− can be measured at the lowest levels with the highest selectivity.
[学术文献 ] Particularities of Fungicides and Factors Affecting Their Fate and Removal Efficacy: A Review 进入全文
Sustainability 期刊
Systemic fungicide use has increased over the last decades, despite the susceptibility of resistance development and the side effects to human health and the environment. Although herbicides and insecticides are detected more frequently in environmental samples, there are many fungicides that have the ability to enter water bodies due to their physicochemical properties and their increasing use. Key factors affecting fungicide fate in the environment have been discussed, including the non-target effects of fungicides. For instance, fungicides are associated with the steep decline in bumblebee populations. Secondary actions of certain fungicides on plants have also been reported recently. In addition, the use of alternative eco-friendly disease management approaches has been described. Constructed Wetlands (CWs) comprise an environmentally friendly, low cost, and efficient fungicide remediation technique. Fungicide removal within CWs is dependent on plant uptake and metabolism, absorption in porous media and soil, hydrolysis, photodegradation, and biodegradation. Factors related to the efficacy of CWs on the removal of fungicides, such as the type of CW, plant species, and the physicochemical parameters of fungicides, are also discussed in this paper. There are low-environmental-risk fungicides, phytohormones and other compounds, which could improve the removal performance of CW vegetation. In addition, specific parameters such as the multiple modes of action of fungicides, side effects on substrate microbial communities and endophytes, and plant physiological response were also studied. Prospects and challenges for future research are suggested under the prism of reducing the risk related to fungicides and enhancing CW performance.
[前沿资讯 ] Vietnam Sets Ambitious Targets for Global Specialty Tea Market 进入全文
World Tea News 网站
The Vietnamese tea market is experiencing strong growth thanks to domestic demand and a weaker market for coffee, caused by high prices. Tea has always been in high demand in Vietnam. Its importance for the country is also reflected by the earlier decision of the Vietnamese Ministry of Agriculture and Rural Development to identify tea as one of the six key industrial crops by 2030 with an area orientation of about 120,000-150,000 hectares. As the demand for tea and its consumption in Vietnam grows, so too does the growth of investment in the market. In recent years, many local tea and coffee chains have expanded their business, with a particular focus on specialty tea products, including so-called ancient tea, to meet the increasingly diverse needs of local consumers.
[学术文献 ] Plant behavior: Theoretical and technological advances 进入全文
Current Opinion in Psychology 期刊
In this paper we review scientific evidence on recent contributions to the study of plants, such as movement and communication as well as potential forms of attention. Some of the most recent contributions to the study of plant abilities come from comparative studies on biocommunication and research on the accuracy of plants in responding to different environmental stimuli through electrophysiological and kinematical analyses in different context (e.g., individual and social). Furthermore, an underexplored area that warrants further investigation is plants’ multisensory perception and its potential link to multimodal communication capabilities. Research into this set of abilities could help to clarify the degree of behavioral flexibility in sessile organisms without a nervous system and enhance discussions on interactive behavior as expressed in nature. This, in turn, will help to bridge the gap between studies on animal organisms and the rest of the living world.
[学术文献 ] Redefining the Tea Green Leafhopper: Empoasca onukii Matsuda (Hemiptera: Cicadellidae) as a Vital Asset in Premium Tea Production 进入全文
Life-basel 期刊
This review explores the evolving role of the tea green leafhopper, Empoasca onukii, in the tea industry, transitioning from a recognized pest to a significant enhancer of tea quality. Recent research highlights how its feeding behavior stimulates the production of desirable secondary metabolites, thereby improving the flavor profiles and market value of premium teas, particularly varieties like Taiwan’s “Oriental Beauty”. As consumer demand for unique and artisanal teas rises, the economic benefits associated with E. onukii are becoming increasingly evident, prompting farmers to adopt sustainable agricultural practices that often involve reduced pesticide use. Furthermore, the dynamic interplay between climatic factors, E. onukii population dynamics, and tea cultivation practices necessitates integrated pest management strategies that balance the beneficial and detrimental impacts of this leafhopper. Understanding these complexities not only fosters sustainable production methods but also opens niche markets, benefiting local economies and promoting both economic viability and environmental sustainability in the tea industry.
