Article
Energy & Fuels
Lihong Yang, Gang Wang, Tonggui Liu, Ye Wan, Haoyi Peng, Lijian Leng, Qifan Zhong
Summary: Amino acids, such as phenylalanine, are important constituents in biomass and their pyrolysis mechanisms were studied through experiments and simulations. Both inorganic and organic compounds were found as gaseous products, with peak concentrations observed at certain temperatures. New reaction pathways were identified in addition to the previously known pyrolysis mechanisms.
Review
Biochemistry & Molecular Biology
Abrar Alhebshi, Nehal Alsharif, Josh Thorley, Lewis J. James, Tom Clifford
Summary: This systematic review examined the effects of dietary protein/amino acid interventions on exercise-induced oxidative stress and inflammation and found weak and inconsistent evidence, calling for further research.
Review
Environmental Sciences
Chengyue Zhu, Kannan Maharajan, Kechun Liu, Yun Zhang
Summary: This article discusses the serious impact of air pollution on human health due to industrialization and urbanization, particularly on the respiratory, circulatory, nervous, and immune systems, as well as the potential relationship between PM and SARS-CoV-2 and COVID-19.
ENVIRONMENTAL RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Kai Wang, Yashan Deng, Yingying He, Junhan Cao, Liping Zhang, Ling Qin, Changfeng Qu, Hongmei Li, Jinlai Miao
Summary: This study investigated the effect of mycosporine-like amino acids (MAAs) extracted from Antarctic diatom Phaeodactylum tricornutum ICE-H on UVB-induced skin damage. The study found that these MAA components protected against UVB-induced skin damage by inhibiting ROS generation, relieving skin inflammation, and slowing down collagen degradation. This suggests that these MAA components could be effective cosmetic candidate molecules for the protection and therapy of UVB damage.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Environmental Sciences
Mariana F. Martins, Patricia G. Costa, Amanda da S. Guerreiro, Adalto Bianchini
Summary: Coastal elasmobranchs are vulnerable to chemical contaminants due to their life history characteristics and trophic positions. The effects of prenatal exposure to contaminants in embryos of the critically endangered Brazilian guitarfish were investigated. The study found that prenatal exposure to contaminants can impact the redox status in embryos and lead to oxidative damage.
ENVIRONMENTAL POLLUTION
(2023)
Article
Chemistry, Multidisciplinary
Tinku Saikia, Jaber Al-Jaberi, Abdullah Sultan
Summary: In this research, synthesized carbon quantum dots (CQDs) were tested as hydrate inhibitors for CO2 hydrates. The CQDs were synthesized using a hydrothermal method and characterized using various techniques. Results showed that the monoethylene glycol (MEG) CQDs had good water solubility and fluorescence properties, and were tested for CO2 hydrate inhibition efficiency in comparison to MEG.
Article
Agriculture, Dairy & Animal Science
Yusheng Liang, Nana Ma, Danielle N. Coleman, Fang Liu, Yu Li, Hongyan Ding, Fabiana F. Cardoso, Claudia Parys, Felipe C. Cardoso, Juan J. Loor
Summary: Increased circulating ceramides in dairy cows may affect adipose tissue metabolism, while dietary methionine or arginine supply may help alleviate potential inflammatory and pro-oxidant effects, affecting protein abundance in adipose tissue. This study provides a theoretical basis for further research on the regulation of bovine adipose tissue.
Article
Nutrition & Dietetics
Scott C. Forbes, Dean M. Cordingley, Stephen M. Cornish, Bruno Gualano, Hamilton Roschel, Sergej M. Ostojic, Eric S. Rawson, Brian D. Roy, Konstantinos Prokopidis, Panagiotis Giannos, Darren G. Candow
Summary: Creatine supplementation has been found to increase creatine content in the brain and shows potential for alleviating symptoms of mild traumatic brain injury and depression. However, its effect on neurodegenerative diseases is limited. Additionally, creatine supplementation may improve cognition and provide neuroprotective effects.
Review
Environmental Sciences
Rupa Rani, Abhidha Kela, Geeta Dhaniya, Kamini Arya, Amit K. Tripathi, Rajesh Ahirwar
Summary: Specific miRNAs have been identified as early warning biomarkers for health effects associated with exposure to PAHs in exposed populations, and they can serve as indicators of early health effects in response to chronic environmental exposure to PAHs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Crystallography
Ina Erceg, Nadica Maltar-Strmecki, Darija Domazet Jurasin, Vida Strasser, Marija Curlin, Daniel Mark Lyons, Borna Radatovic, Nives Matijakovic Mlinaric, Damir Kralj, Maja Dutour Sikiric
Summary: This study compared the influence of different classes of amino acids on calcium phosphate formation and transformation, with results showing that all investigated amino acids inhibited the conversion of amorphous calcium phosphate except for phenylalanine, and serine being the most effective inhibitor. Calcium-deficient hydroxyapatite was the main transformation product, with different amino acids affecting the size of crystalline domains and CaDHA morphology. EPR spectra showed different radical species proportions depending on the type of amino acid present.
Article
Materials Science, Multidisciplinary
Bingzhu Wang, Daxin Li, Zhihua Yang, Dechang Jia, Jingyi Guan, Delong Cai, Peigang He, Xiaoming Duan, Yu Zhou
Summary: This study evaluated the oxidation resistance and damage mechanism of hot-pressed SiBCN-Ta4HfC5 composite ceramics. It was found that the ceramic containing 10 wt% Ta4HfC5 had a lower oxide layer thickness during high-temperature oxidation, and the oxidation products of Ta4HfC5 formed a dense passivating oxide layer, reducing the precipitation of cristobalite and improving the anti-oxidation ability.
Article
Veterinary Sciences
Amanda Medeiros Correia, Jansller Luiz Genova, Alysson Saraiva, Gabriel Cipriano Rocha
Summary: This study investigated the effects of crude protein and non-essential amino acid supplementation on the growth performance and intestinal health of piglets after weaning. The results showed that a high CP diet improved feed conversion ratio, while a low CP diet supplemented with NEAA promoted intestinal health.
FRONTIERS IN VETERINARY SCIENCE
(2023)
Article
Engineering, Chemical
Lingjun Bu, Xiaojun Chen, Yangtao Wu, Shiqing Zhou
Summary: In this study, it was found that the UV/chlorine process promotes the formation of DCNP, indicating the contribution of nitrogen sources in amino acids to HNPs formation. The convertible tendency from HNPs to aliphatic DBPs was observed and confirmed, and a possible formation pathway of DCNP from oligopeptides was proposed, providing a reliable theoretical basis for a comprehensive understanding of HNPs precursors, formation mechanisms, and control methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Agriculture, Dairy & Animal Science
N. Ma, Y. Liang, D. N. Coleman, Y. Li, H. Ding, F. Liu, F. F. Cardoso, C. Parys, F. C. Cardoso, X. Shen, J. J. Loor
Summary: Enhanced post-ruminal supply of methionine affects protein abundance of insulin, amino acids, and antioxidant signaling pathways in subcutaneous adipose tissue. It is unclear if SAT directly responds to methionine supply and induces molecular alterations. The study showed that increased methionine supply during an oxidative stress challenge can alter protein abundance related to insulin, amino acids, inflammation, and antioxidant signaling pathways.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Nutrition & Dietetics
Kentaro Umeda, Daichi Shindo, Shinji Somekawa, Shinobu Nishitani, Wataru Sato, Sakiko Toyoda, Sachise Karakawa, Mika Kawasaki, Tomoyuki Mine, Katsuya Suzuki
Summary: This study assessed the effect of a combination of five amino acids (serine, alanine, glutamate, aspartate, and tyrosine) on mental health. The results showed that the SAGAT group exhibited significant improvement in motivation and cognitive function.
Article
Chemistry, Applied
Luxin Ren, Wangchen Huo, Guiying Li, Wonyong Choi, Taicheng An
Summary: This study investigated the photocatalytic transformation pathways of 5-fluorouracil (5-FU) and the inhibition mechanisms of its degradation efficiency reduction using TiO2 supported on nickel foam (TiO2/NF) as the photo-catalyst and pharmaceutical micropollutant. The produced intermediates during the photocatalytic degradation of 5-FU were identified as mono/polyhydroxylated compounds, short-chain oxides, and carboxylation ones. The inhibition of 5-FU degradation was found to be attributed to the competition for hydroxyl radical (center dot OH) and the preferential consumption of center dot OH in the TiO2 diffusion layer by the intermediates.
Article
Environmental Sciences
Jiaxin Wang, Xiaohui Ma, Yuemeng Ji, Yongpeng Ji, Yanpeng Gao, Yuqi Xiao, Guiying Li, Taicheng An
Summary: This study systematically investigated the mechanisms and kinetics of the aqueous-phase reactions of 1-butanol/1-decanol and their roles in the formation of organosulfate (OSA) nanoparticles. It was found that the reactions start from protonation of hydroxyl groups followed by esterification or oligomerization reactions, leading to the formation of OSA nanoparticles. Short-chain alcohols contribute more to the formation of OSA nanoparticles compared to long-chain alcohols. Additionally, long-chain alcohols participate in nanoparticle growth through esterification.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Environmental Sciences
Simeng Zhang, Zhishu Liang, Xiaolong Wang, Zikai Ye, Guiying Li, Taicheng An
Summary: This study investigated the community composition, source, and influencing factors of indoor bioaerosols near an electronic waste industrial park. The results showed that the bioaerosol level in the morning was lower than in the evening, and the indoor bioaerosol concentration and activity were lower than in the industrial park. Bacterial communities were richer and more diverse than fungi, and the dominant indoor pathogens were Bacillus and Cladosporium.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Environmental Sciences
An Yang, Meiqiong Luo, Zenghua Qi, Zhiyong Fan, Muhammad Zaffar Hashmi, Guiying Li, Yingxin Yu
Summary: This study investigates the temporal trends of organophosphorus flame retardants (OPFRs) in Taihu regions and the associated health risks from fish consumption. The results show that OPFRs are widely detected in the fish samples, with 2-ethylhexyl diphenyl phosphate (90.7%) and tris (1,3-dichloro-2 propyl) phosphate (21.5%) as the most and least frequently detected OPFRs, respectively. The temporal trends analysis reveals higher levels of OPFRs in 2013 compared to other years, but no significant change in the trend over time. The estimated daily intake of OPFRs from large icefish consumption is higher than that of other fish species, but the Monte Carlo simulations suggest a low noncancer health risk for adults and children from OPFRs via fish consumption.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Qianyong Shen, Ranran Liu, Jingyi Chen, Guiying Li, Shengtao Ma, Yingxin Yu, Taicheng An
Summary: Occupational workers and residents near petrochemical industry facilities are exposed to multiple contaminants on a daily basis. However, little is known about the co-exposure effects of different pollutants based on biotransformation. This study investigated the changes in toxicity and co-exposure mechanism associated with different monoaromatic hydrocarbons (MAHs) when co-exposed with benzene, toluene, chlorobenzene, or nitrobenzene. The results showed that co-exposure to MAHs negatively affected the detoxification process of benzo[a]pyrene (BaP) and disturbed its metabolic pathways.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Jian Tang, Shengtao Ma, Xin Hu, Meiqing Lin, Guiying Li, Yingxin Yu, Taicheng An
Summary: This study evaluated the association between organophosphorus flame retardants (OPFRs) in handwipes and internal body burden on workers and residents in an e-waste dismantling area. The findings suggest that handwipes can serve as non-invasive exposure indicators to assess body burden and health effects of dermal exposure to OPFRs on thyroid hormones (THs).
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Meiqing Lin, Shengtao Ma, Jian Tang, Yingxin Yu, Guiying Li, Ruifang Fan, Guoxia Zhang, Bixian Mai, Taicheng An
Summary: Polybrominated diphenyl ethers (PBDEs) are important pollutants during e-waste dismantling activities in China. Bromophenols (BPs), which are flame retardants and metabolites of PBDEs, are often overlooked in assessing human exposure to e-waste. Analysis of serum, hair, and urine samples showed higher frequencies of PBDE and BP detection in hair. Although levels of EPBDEs and EBPs were significantly higher in the hair of occupational populations, no significant difference was found in serum and urine levels between occupational and non-occupational populations. The study suggests that hair analysis can better differentiate the exposure intensities of PBDEs and BPs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Na Luo, Yanpeng Gao, Mei Wang, Xiaolin Niu, Guiying Li, Taicheng An
Summary: The study investigates the transformation mechanism and pathway of tonalide, a representative synthetic musk, under ultraviolet (UV) irradiation in water. It is found that tonalide undergoes rapid photochemical degradation through a new pivotal bi-radical acting as the initial active species. The main degradation by-product, photoenol, with higher bioconcentration than tonalide, is formed through the photoenolization of the bi-radicals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Yan Yang, Shiyao He, Zenghua Qi, Xuyang Chai, Qiting Zhao, Beibei Hu, Guiying Li, Yingxin Yu
Summary: Mixed bromine/chlorine transformation products of tetrabromobisphenol A (ClyBrxBPAs) have been found in electronic waste dismantling sites and their toxicity is not well understood. This study investigated the proliferation toxicity of two ClyBrxBPA analogues on human embryonic stem cells (hESC) and compared them to other similar compounds. It was observed that ClyBrxBPAs inhibited hESC proliferation in a concentration-dependent manner and were more toxic than tetrabromobisphenol A. The results suggest that ClyBrxBPAs may have developmental toxicity in children.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Chao Wang, Wanjun Wang, Weiqiang Deng, Shu Zhang, Shaobin Shao, Meicheng Wen, Guiying Li, Taicheng An
Summary: The occurrence and adverse effects of volatile organic compounds (VOCs) from coking wastewater treatment processes were investigated. Benzene and naphthalene were found to be the major VOCs in the air phase, while benzene, naphthalene, and toluene contributed most to total VOCs in the water phase. The regulating tank was identified as the major source of VOCs, with an emission rate of 2711.03 g/d. The environmental and health risks associated with VOCs were assessed, with carcinogenic and non-carcinogenic risks exceeding the risk thresholds in the regulating tank.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Linghui Peng, Haiyu Wang, Guiying Li, Zhishu Liang, Weiping Zhang, Weina Zhao, Taicheng An
Summary: Bioaerosol can lead to disease transmission, but current filtration systems are often ineffective. This study presents a bioinspired photocatalyst that can efficiently capture and inactivate airborne bacteria. The artificial spider silk (ASS) photocatalyst exhibits high capture capacity and photocatalytic inactivation efficiency. This research provides a promising strategy for developing materials for bioaerosol purification.
NATURE COMMUNICATIONS
(2023)
Article
Environmental Sciences
Xiaolin Niu, Guanhui Chen, Yi Chen, Na Luo, Mei Wang, Xinyi Hu, Yanpeng Gao, Yuemeng Ji, Taicheng An
Summary: This study investigated the environmental transformation and health effects of endocrine disruptors (EDCs), and discovered an important transformation product (dimer) with estrogenic activity. Environmental factors were found to play a significant role in its formation. Quantum chemical and toxicological calculations revealed the estrogenic effect mechanism of the dimer and its higher health risk compared to the parent compound.
Article
Environmental Sciences
Wenxia Wang, Zhen Li, Kailin Wu, Guodong Dai, Qingping Chen, Lihua Zhou, Junxia Zheng, Liang Ma, Guiying Li, Wanjun Wang, Taicheng An
Summary: Rational design and synthesis of highly efficient photocatalysts with positive exciton splitting and interfacial charge transfer is essential for environmental applications. In this study, a novel Ag-bridged dual Z-scheme g-C 3 N 4 /BiOI/AgI plasmonic heterojunction was successfully synthesized, demonstrating exceptional photocatalytic degradation efficiency of tetracycline in water and good stability. The improved performance and stability were attributed to the highly ordered 3D porous framework, fast electron transfer of dual Z-scheme heterojunction, desirable photocatalytic performance of BiOI/AgI and synergistic effect of Ag plasmas. This research provides new insights and guidance for designing novel structural photocatalysts for environmental applications.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Review
Environmental Sciences
Xinlin Shen, Jiangyao Chen, Guiying Li, Taicheng An
Summary: This review summarizes the new advances in the sources and pollution preferences of amines in the past decade, and discusses their impacts on atmospheric particulate matter formation and climate evolution. The pollution profiles and source identification of amines have been updated with newfound sources. The atmospheric oxidation reaction mechanisms of amines with various active radicals are also discussed. Combined data from field monitoring, laboratory experiments, and theoretical calculations confirm the significant contribution of amines to aerosol particles and their effects on climate.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2023)
Article
Ecology
Taicheng An, Yiwei Cai, Guiying Li, Shaoting Li, Po Keung Wong, Jianhua Guo, Huijun Zhao
Summary: Due to the widespread use of antibiotics, aquaculture farms have become a significant source of antibiotic resistance genes. This study investigated the prevalence and transmission risk of colistin and multidrug resistance in aquaculture water samples from southern China. The results showed that colistin resistance genes and antibiotic resistance genes were present in all samples, and most types of antibiotic resistance were transmissible between bacterial communities. The study also identified diverse multidrug-resistant bacteria, including a strain with high-level colistin resistance.
ISME COMMUNICATIONS
(2023)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.
