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RSSI-Based Autonomous Tracking System for Radio-Tagged Flying Insects Using UAV With Rotational Antenna

IEEE Access 2025年 13卷 72040-72053页

作者： Pak, Jeonghyeon Kim, Bosung Son, Hyoung Il Chonnam National University Department of Convergence Biosystems Engineering Gwangju61186 Korea Republic of Chonnam National University Interdisciplinary Program in IT-Bio Convergence System Gwangju61186 Korea Republic of Chonnam National University Research Center for Biological Cybernetics Gwangju61186 Korea Republic of

The escalating effects of climate change have heightened the urgency of ecosystem conservation efforts worldwide. In this context, pollinators such as honeybees play a critical role in maintaining ecosystem health. However, they face appreciable threats, including the proliferation of invasive alien species (IAS) and colony collapse disorder. In this study, we propose a novel tracking system that uses unmanned aerial vehicles (UAVs) equipped with rotational directional antennas and radio telemetry systems. This approach, which represents an improvement over our previous works, aims to protect biodiversity and ecosystem resilience by mitigating the adverse impacts of IAS on pollinator populations. To implement the proposed tracking strategy, a motor-based directional antenna that can rotate 360° is attached to a UAV, and the received signal strength indicator (RSSI) value is used to localize the hornets to which sensors are attached. The proposed tracking system was verified in a simulated field environment that was constructed by considering the RSSI values obtained in a forest. In addition, the robustness and field applicability of the tracking system were improved by applying it to scenarios consisting of different paths that were constructed considering the dynamic nature of hornets. © 2013 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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Impact of discharge gas on a novel continuous flow in-liquid plasma discharge process for cobalt remediation and recovery from wastewater

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Journal of Environmental Management 2025年 384卷 125570页

作者： Mohotti, Dinithi Hossain, Md Mokter Mukhtar, Ahmad Wu, Sarah Environmental Science Program University of Idaho MoscowID83844 United States Department of Chemical and Biological Engineering University of Idaho MoscowID83844 United States

Cobalt contamination in wastewater poses significant health and environmental risks, necessitating efficient removal and recovery strategies. This study examines the role of various discharge gases-air, argon, hydrogen, and helium-in optimizing cobalt removal/recovery and energy efficiency using a novel continuous flow in-liquid plasma discharge (CFILPD) process. The effect of gas flow rate and applied power were assessed with air and argon to determine optimal conditions for maximizing cobalt removal. In air discharge, increased gas flow rate reduced cobalt removal due to the formation of acidic reactive species, whereas argon flow rate had no significant impact. Under the optimal operating condition at 200 W and 0.2 L/min gas flow, cobalt removal after 30-min treatment followed the trend: hydrogen (92 %) > helium (90 %) > argon (89 %) > air (74 %). Introduction of discharge gases enhanced energy efficiency of the CFILPD process by 34.5 % compared to gas-free operation. Helium gas yielded the highest energy efficiency (0.393 g/kWh) during the first 20 min, with similar result observed for argon, and both showed fastest kinetics in cobalt removal. The process yielded cobalt oxide particles as the sole byproduct, offering economic value for industrial applications. Morphological analysis revealed that particles recovered with argon exhibited smoother surfaces, while those obtained using air, helium, and hydrogen displayed porous structures. These findings underscore the potential of the CFILPD process as an effective and energy-efficient method for cobalt removal and recovery from wastewater, with argon emerging as the most cost-effective option. © 2025 Elsevier Ltd

关键词： Wastewater reclamation

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Enhanced production of microbial levulinic acid through deletion of the levulinic acid transcriptional regulator (lvaR) in engineered Pseudomonas putida KT2440

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Bioprocess and biosystems engineering 2025年 2025 May 19页

作者： Hyun Jin Kim Byung Chan Kim Gaeun Lim Yebin Han Yunhee Jeong Hee Taek Kim Woo-Young Jeon Jungoh Ahn Shashi Kant Bhatia Yung-Hun Yang Advanced Materials Program Department of Biological Engineering College of Engineering Konkuk University Seoul 05029 Republic of Korea. Department of Food Science and Technology Chungnam National University Daejeon Republic of Korea. Biotechnology Process Engineering Center Korea Research Institute Bioscience Biotechnology (KRIBB) Chungbuk Republic of Korea. Institute for Ubiquitous Information Technology and Application Konkuk University Seoul Republic of Korea. Advanced Materials Program Department of Biological Engineering College of Engineering Konkuk University Seoul 05029 Republic of Korea. seokor@konkuk.ac.kr. Institute for Ubiquitous Information Technology and Application Konkuk University Seoul Republic of Korea. seokor@konkuk.ac.kr.

Levulinic acid (LA) is a platform compound regarded as a promising organic intermediate for the synthesis of various chemicals such as fuel additives, plasticizers, solvents, and pharmaceuticals. Traditionally, LA is produced via acid-catalyzed dehydration and hydrolysis of lignocellulosic biomass, but this process involves challenges such as high temperatures and pressures, the use of strong acids, byproducts formation, and limitations in recovery and purification. To provide an alternative for chemical synthesis, we previously designed an integrated process to produce LA from glucose using genetically engineered Pseudomonas putida KT2440. However, as the consumption of the produced LA could not be completely prevented, its overall yield was limited. Therefore, in this study we constructed P. putida strains with additional knock-out of the lva operon genes (lvaAB, lvaE, and lvaR) in a pcaIJ knock-out strain, and introduced the aroG, asbF, and adc genes to design an LA production pathway. The pcaIJ, lvaR double knock-out strain P. putida HP205 produced 20.42 mM of LA from glycerol, and culture condition including temperature, glucose concentration, and nitrogen source were optimized. Under optimal conditions, P. putida HP205 produced 73.9 mM (8.58 g/L) LA in fed-batch fermentation. When crude glycerol was used as the substrate, both LA production and cell growth were enhanced. This study presents the impact of the LA transcriptional regulator and demonstrates a strategy for enhanced LA production in P. putida.

关键词： adc aroG asbF lva operon lvaR Levulinic acid

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Structural analysis of a neutral polysaccharide ATP-1 from the red seaweed Asparagopsis taxiformis and its immunomodulatory effects on RAW264.7 macrophages

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Food Science and Human Wellness 2025年

作者： Kun Yang Baojun Xu Wei Hu Yifan Tang Amy Hui-Mei Lin Saiyi Zhong College of Food Science and Technology， Guangdong Ocean University， Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety，Guangdong Province Engineering Laboratory for Marine Biological Products， Guangdong Provincial Engineering Technology Research Center of Seafood Guangdong Provincial Engineering Technology Research Center of Prefabricated Seafood Processing and Quality Control Food Science and Technology Program， Department of Life Sciences， BNU-HKBU United International College Singapore Institute of Food and Biotechnology Innovation (SIFBI) Shenzhen Research Institute， Guangdong Ocean University

As a seaweed supplement， the powdered， entire herb of Asparagopsis taxiformis can effectively promote immune response in animals. However， the active factors responsible for this effect are currently unknown. A novel polysaccharide， ATP-1， was isolated and purified from the red alga A. taxiformis， and its structural and immunomodulatory properties were determined. ATP-1 is a neutral polysaccharide with a molecular weight of 307.978 kDa and is primarily composed of galactose (94.07%)， glucose (1.27%)， and xylose (4.66%). Scanning electron microscopy and atomic force microscopy revealed that ATP-1 had an amorphous structure and was composed of molecular chain entanglement and intramolecular hydrogen bonding interactions. The microstructure of ATP-1 exhibited asymmetric sheet–like cracks and pores. Results from immunomodulatory activity showed that ATP-1 promoted inducible nitric oxide (NO) synthase and cyclooxygenase (COX)-2 protein expression in RAW264.7 macrophages， improved macrophage phagocytic ability， and stimulated cytokine production (NO， tumor necrosis factor [TNF]-α， and interleukin [IL]-6). Quantitative proteome analysis identified 178 differentially expressed proteins (70 upregulated and 108 downregulated) that were involved in various molecular pathways， among which， TNF was one of the 20 most common and significant signaling pathways in inflammation and immunoregulation. Western blotting indicated that ATP-1 significantly upregulated the expression of IKKα， IKKβ， COX-2， and TNF-α proteins in the TNF pathway. In contrast， ATP-1 downregulated the expression of IκBα， Fas， and AIPI. Results from molecular docking suggested that hydrogen bonding predominantly contributed to the affinity between TNF-α and galactose， glucose， and xylose. These findings indicated that ATP-1 may play an immunomodulatory role by activating the TNF signaling pathway. ATP-1 enhanced macrophage phagocytic capacity and stimulated the production of cytokines NO， TNF-α， and IL-6， thereb

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Ecological effects of micro/nanoplastics on plant-associated food webs

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Trends in Plant Science 2025年第5期30卷 526-538页

作者： Ilyas, Muhammad Duarte, Carlos M. Xu, Elvis Genbo Xu, Guorui Yang, Jie State Key Laboratory of Plant Diversity and Specialty Crops Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Yunnan Menglun 666303 China University of Chinese Academy of Sciences Beijing 100049 China Marine Science Program Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Department of Biology University of Southern Denmark Odense 5230 Denmark

Micro/nanoplastics (MNPs) contamination is a potential threat to global biodiversity and ecosystem functions, with unclear ecological impacts on aboveground (AG) and belowground (BG) food webs in terrestrial ecosystems. Here, we discuss the uptake, ingestion, bioaccumulation, and ecotoxicological effects of MNPs in plants and associated AG-BG biota at various trophic levels. We propose key pathways for MNPs transfer between the AG-BG food webs and elaborate their impact on terrestrial ecosystem multifunctionality. We conclude that MNPs are bioaccumulated in most studied plants and associated AG-BG biota and can be transferred along AG-BG food webs, which may profoundly impact ecosystem functioning. However, most pathways are still untested. Future research on MNPs should focus on the interactions within AG-BG food webs in terrestrial ecosystems. © 2024 Elsevier Ltd

关键词： aboveground–belowground interactions bioaccumulation ecological multifunctionality ecotoxicity plastic pollution trophic transfer

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Treatment with metal–organic frameworks (MOFs) elicits secondary metabolite accumulation in Aquilaria crassna (agarwood) callus culture

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Discover Plants 2025年第1期2卷 1-9页

作者： Overmans, Sebastian Alflayyeh, Yazan Gutiérrez, Sergio Aldlaigan, Yousef Lauersen, Kyle J. Bioengineering Program Biological and Environmental Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Jeddah Kingdom of Saudi Arabia Plant Tissue Culture & Biotechnology Center Ministry of Environment Water and Agriculture of Saudi Arabia (MEWA) Riyadh Kingdom of Saudi Arabia

Thymelaceaous trees are prized for accumulating fragrant resins composed of hundreds of secondary metabolites in their woody tissues. Slow growth and increasing consumer demand have stretched natural sources of agarwood trees to being endangered and alternative production modes, including silviculture and tissue culture, are currently being investigated. Dedifferentiated tissue culture of agarwood trees provides a means of cell propagation independent of environmental context. However, secondary metabolite accumulation, as found in fragrant resins, occurs largely in response to wounding. Here, we investigated the application of metal-organic frameworks (MOFs) as potential elicitors of secondary metabolite formation in Aquilaria crassna tissue culture. Callus cultures were exposed to five commercially available MOFs (UiO-67, MOF-808, HKUST-1, ZIF-67, and MOF-74) and ethanol extracts were analysed using GC-MS to quantify secondary metabolite accumulation in MOF-exposed cultures compared to untreated cultures. Samples that were exposed to either of the two Zr-based MOFs exhibited metabolite production profiles that were similar to each other, (trans-2-Carboxy-cyclo-hexyl)-acetic acid was reduced in the presence of all MOFs, the Cu-containing HKUST-1 MOF increased palmitic acid levels, and ZIF-67 (at 20 mg/L) was found to elicit the highest accumulation of secondary metabolites with potential fragrance applications. These results demonstrate the possibility of eliciting secondary metabolites from dedifferentiated agarwood tree cell culture and may provide an alternative means of sourcing fragrant specialty chemicals from these plants.

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Real-time monitoring method of microbial growth using a simple pressure-based respiration detection system

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Analytical Biochemistry 2025年 703卷

作者： Shin, Nara Oh, Jinok Han, Yebin Lim, Gaeun Joo, Jeong Chan Jeon, Woo-Young Ahn, Jungoh Kim, Hee Taek Bhatia, Shashi Kant Yang, Yung-Hun Advanced Materials Program Department of Biological Engineering College of Engineering Konkuk University Seoul Korea Republic of Department of Chemical Engineering Kyung Hee University Gyeonggi-do Korea Republic of Chungbuk Korea Republic of Department of Food Science and Technology Chungnam National University Daejeon Korea Republic of Institute for Ubiquitous Information Technology and Applications Konkuk University Seoul Korea Republic of

Dry cell weight (DCW) and optical density (OD) measurement methods provide useful data for assessing microbial growth. However, their sampling process is labor-intensive and time-consuming. Therefore, we aimed to evaluate a method for measuring microbial growth through continuous CO2 measurement under aerobic conditions using a pressure-based respiration detection system, which is traditionally used in anaerobic environments and applies measurement of reduced pressure by capturing CO2 with KOH. The pressure reduction rate, OD, and DCW values were compared during Ralstonia eutropha H16 culture, which revealed a correlation of R2 of 0.99 between the pressure reduction and DCW and a change of DCW (g/L) per pressure (1 mbar) of −0.02 g/L. It showed theoretical limit of detection at 14.67 mbar corresponding to 0.0428 g/L of DCW and theoretical limit of quantification at 48.9 mbar as lower limits. When the pressure-based method was applied to compare carbon source utilization and growth of different strains, such as E. coli sp., Pseudomonas sp., Burkholderia sp., and Bacillus sp., it showed a high correlation with DCW. Overall, these results demonstrate that the pressure-based respiration detection system is a reliable tool for microbial growth monitoring and offers significant advantages by providing real-time data with less labor. © 2025 Elsevier Inc.

关键词： Dry cell weight Microaerobic Optical density Pressure Respiration detection system

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Genetic architecture of anthocyanin pigment traits and purple spot (Stemphylium vesicarium) resistance in an F₁ pseudo-testcross population of asparagus

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Plant Genome 2025年第2期18卷 e70028页

作者： Parajuli, Suman McDonald, Mary Ruth Adhikari, Laxman Wolyn, David J. Department of Plant Agriculture University of Guelph Guelph ON Canada Plant Science Program Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia

Stemphylium vesicarium (Wallr.) Simmons is a plant pathogenic fungus causing purple spot in both fern and spears of asparagus (Asparagus officinalis L.). Although the fern can be sprayed with fungicides to control the disease, pesticide applications during spear harvest are restricted. Infected spears can develop prominent pigmentation at lesion sites, reducing marketable yield. Breeding resistant asparagus cultivars with decreased lesion numbers and reduced purpling at the site of infection is considered the most economical and sustainable approach to combat this disease. The objectives of this study were to determine the genetic architectures of, and relationships among, anthocyanin pigment expression in spear scale leaves (ALS) and spear lesions (APS) and purple spot levels in spears (NPS) and fern (PSF). Traits were phenotyped over 2 years under natural conditions in an F₁ pseudo-testcross population, and quantitative trait loci (QTL) were mapped. ALS, APS, NPS, and PSF were not correlated, suggesting independent regulation of the anthocyanin pathway in scale leaves and lesions and no relationship between pigment and disease. Segregation, 3 red:1 purple and 3 red:13 purple, was observed in scale leaves and lesions, respectively. Two stable QTL for each of ASL, APS, and NPS, one tentative QTL for ASL, four tentative QTL for APS, two tentative QTL for NPS, and three tentative QTL for PSF were identified. Candidate genes were found for four loci. This study advances the genetic understanding of anthocyanin pigmentation at a tissue-specific level, and purple spot disease severity in spears and fern, supporting future breeding efforts. © 2025 The Author(s). The Plant Genome published by Wiley Periodicals LLC on behalf of Crop Science Society of America.

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Porous Poly(vinylidene fluoride-co-hexafluoropropylene)/copper oxide nanocomposite membranes for piezoelectric strain sensing

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Discover Applied Sciences 2025年第5期7卷 1-17页

作者： Al-Ejji, Maryam Promi, Tamanna Sangor, Farah Al-Awa, Zinab Bonthula, Sumalatha Radhika, V. Ponnamma, Deepalekshmi Center for Advanced Materials Qatar University Doha Qatar Department of Biological and Environmental Sciences Qatar University Doha Qatar Department of Chemical Engineering University of Calicut Thenhipallam India Materials Science and Technology Program Department of Mathematics Statistics and Physics College of Arts and Sciences Qatar University Doha Qatar

The emerging field of porous piezoelectric strain sensors attracted a wide range of applications in healthcare monitoring, wearable electronics, and other dynamic applications due to their durability, high sensitivity, and real-time monitoring. This study presents the development of porous poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)/copper oxide (CuO) nanocomposite membranes for piezoelectric strain sensing. The morphology and the dispersion of CuO nanoparticles and nanofibers in PVDF piezoelectric films with different nano-CuO contents are studied by X-ray diffraction, Fourier transform infrared spectrum, scanning electron microscopy and dielectric studies. The PVDF-HFP acts as a scaffold, allowing ions to flow within the porous percolated channels, resulting in a highly robust membrane with desired dielectric properties. The DMA studies enhanced the strain sensing performance of the 3.5 and 7 wt.% CuO nanofibers loaded with PVDF-HFP membranes compared with the 3.5 and 7 wt.% CuO nanoparticles and pristine membranes. The dielectric properties of the composites also showed high storage values for the CuO/PVDF-HFP samples compared to the pristine polymer. Moreover, the surface water contact angles of the membranes have slightly increased after loading the nanomaterial into the PVDF-HFP matrix, which strongly influenced the surface energies, indicating hydrophobicity. The current study, thus, demonstrates the piezoelectric strain sensing devices made from PVDF-HFP/CuO nanofibers for humid atmospheres.

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Sorptive removal of neonicotinoid pesticides by nanobiochars: Efficiency, kinetics, and reusability

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Journal of Hazardous Materials 2025年 493卷

作者： Radwan, Islam M. Wang, Chongyang Kim, Jae-Hong Wei, Haoran Wang, Dengjun Department of Agricultural and Biological Engineering University of Florida GainesvilleFL32611 United States Department of Chemical and Environmental Engineering Yale University New HavenCT06511 United States Environmental Chemistry and Technology Program University of Wisconsin−Madison 660 N. Park Street MadisonWI53706 United States Department of Civil and Environmental Engineering University of Wisconsin−Madison 1415 Engineering Drive MadisonWI53706 United States

The widespread use of neonicotinoid (NEO) pesticides has raised significant environmental concerns due to their toxicity. We investigated the performance of 16 nanobiochars (NBCs), including NBC produced by Douglas fir at 900 °C (Doug 900 NBC), as sustainable sorbents for removing three common NEOs from aqueous solutions: imidacloprid, clothianidin, and thiamethoxam. The NBCs showed high sorption efficiency (∼ 100 %) and fast sorption kinetics ( © 2025 Elsevier B.V.

关键词： Reusability

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