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Determination and Prediction of Digestible Energy, Metabolizable Energy, and Standardized Ileal Digestibility of Amino Acids in Barley for Growing Pig

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SSRN 2022年

作者： Li, Rui Tian, Mingzhou Feng, Ganyi Hou, Gaifeng Jiang, Xianji Yang, Gang Xiang, Qiang Liu, Xiaojie Long, Cimi Huang, Ruilin Yin, Yulong Key Laboratory of Agro-Ecological Processes in Subtropical Region Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process Hunan Research Center of Livestock and Poultry Sciences South Central Experimental Station of Animal Nutrition and Feed Science in the Ministry of Agriculture National Engineering Laboratory for Poultry Breeding Pollution Control and Resource Technology Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha410125 China College of Animal Science and Technology Hunan Co-Innovation Center of Animal Production Safety Hunan Agricultural University Changsha410128 China

Two experiments were performed to determine the digestible energy (DE), metabolizable energy (ME) and standardized ileal digestibility coefficients of amino acids (SIDC AA), and to develop prediction equations for the DE, ME and SIDC AA in barleys for pigs. Exp. 1, twenty-two castrated boars (29.5 ± 1.3 kg) were allotted to a replicated 11 × 3 incomplete Latin square design, including 11 diets and 3 consecutive periods. A corn-soybean meal basal diet and 10 test diets containing 400 g/kg of each barley at expense of corn-soybean meal were prepared, and all diets had constant ratio of corn to soybean meal. Each period include 7 d adaption and 5 d total feces and urine collection. The DE and ME contents were measured by the total collection method. Exp. 2, twenty-two ileal cannulated pigs (30.5 ± 2.1 kg) were used in a duplicated 11 × 3 incomplete Latin square design with 11 diets and three 7-day periods. Titanium dioxide (3 g/kg) was added to all diets as indicator and ieal digesta were collected on d 6 and 7 in each period. Barley was the sole nitrogen source in 10 barley diets and a N-free diet was used to the endogenous nitrogen losses. The results showed the great variations in ether extract (EE), calcium (Ca), crude ash (Ash), acid detergent fiber (ADF) and crude fiber (CF) among barleys. The DE and ME in barley for pigs were 12.26 (11.29-13.58) MJ/kg and 11.87 (10.95-13.15) MJ/kg, respectively. The optimal prediction equations for DE and ME were DE (MJ/kg) = -23.594 + 0.358 crude protein (CP) + 0.043 EE (R2=0.95) and ME (MJ/kg) = 0.338 + DE - 0.139 ADF (R2=0.99), respectively. The SIDC of Lys, Met, Thr, and Trp in barley were 0.77 (0.73-0.81) g/kg, 0.83 (0.80-0.87) g/kg, 0.81 (0.79-0.82) g/kg, and 0.79 (0.76-0.86) g/kg, respectively. The best-fit prediction equations for SIDC of Lys, Met, Thr and Trp in barley fed to pigs were SIDC Lys = 0.721 + 0.002 EE (R2=0.79), SIDC Met = 1.045 - 0.001 total starch (TS, R2=0.69), SIDC Thr = 0.767 + 0.002 ADF - 0.001 CF (R2=

关键词： Amino acids

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Neural Network Establishes Co-Occurrence Links between Transformation Products of the Contaminant and the Soil Microbiome

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SSRN 2023年

作者： Xiang, Yuhui Yu, Yansong Wang, Jiahui Li, Weiwei Rong, Yu Ling, Haibo Chen, Zhongbing Qian, Yiguang Han, Xiaole Sun, Jie Yang, Yuyi Chen, Liang Li, Juying Chen, Ke Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission College of Resources and Environmental Science South-Central Minzu University Wuhan430074 China Hubei Key Laboratory of Pollution Damage Assessment and Environmental Health Risk Prevention and Control Hubei Provincial Academy of Eco-Environmental Sciences Wuhan430074 China Department of Applied Ecology Faculty of Environmental Sciences Czech University of Life Sciences Prague Praha16500 Czech Republic Research Center for Environmental Ecology and Engineering School of Environmental Ecology and Biological Engineering Wuhan Institute of Technology Wuhan430205 China Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden Chinese Academy of Sciences Wuhan430074 China Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation College of Chemistry and Environmental Engineering Shenzhen University Shenzhen518060 China

It is still a challenge to establish reliable links between transformation products (TPs) of the contaminant and the microbiome as the discovery of TPs still requires a sophisticated experiment regime. Additionally, linear approaches such as Pearson’s and Spearman’s correlations, which are widely used, may face challenges to deal with this issue. It is due to that 16S rRNA gene amplicon sequencing and mass spectrometry datasets are compositional, which may confound statistical inference. In this study, we combined the use of 2H-labeled Stable Isotope-Assisted Metabolomics (2H-SIAM) and a neural network-based algorithm (i.e., MMvec) to explore links between TPs and microbiome. Links between degraders and degradation products were well discussed, and other links provided valuable information. A metagenomic study provided indirect evidence for the established links. Identification of pyrene degraders from soils, and DNA-SIP (DNA-based stable isotope probing) study were further conducted, both of which provided direct evidence for the established links. The comparison among different approaches, for instance, Pearson’s and Spearman’s correlations, further confirms the performance of the provided strategy. In the end, the unique features of the combined use of 2H-SIAM and MMvec were summarized. © 2023, The Authors. All rights reserved.

关键词： Mass spectrometry

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Mechanistic Insights into Removal of Electron-Rich Emerging Pollutants Using Carbon Nitride Co-Modified Cyanobacteria Biochar in Fenton-Like Oxidation Reaction: Dual Non-Radical Degradation Pathways

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SSRN 2024年

作者： Deng, Jie Chen, Jiaqing Zeng, Yuxi Yang, Hailan Li, Fang Song, Biao Yang, Yang Wang, Ziwei Zhou, Chengyun Wang, Wenjun College of Environmental Science and Engineering Key Laboratory of Environmental Biology and Pollution Control Ministry of Education Hunan University Changsha410082 China College of Environmental and Resource Sciences Zhejiang University Zhejiang Hangzhou310058 China Department of Chemical and Materials Engineering University of Alberta EdmontonABT6G 1H9 Canada Department of Applied Physics The Hong Kong Polytechnic University Kowloon China School of Resources and Environment Hunan University of Technology and Business Changsha410205 China

Biochar has the issues with inadequate stability and low catalytic activity. In this study, two-step ball milling method was applied to synthesis carbon nitride co-modified cyanobacteria biochar (CN-BC). The optimized CN-BC can effectively activate peroxymonosulfate (PMS) to degrade emerging pollutants. The degradation rate constant of enrofloxacin in the CN-BC/PMS system reached 0.815 min-1. Free radical quenching experiments and electrochemical experiments confirmed that the electron transfer and 1O2 were the main pathways in the CN-BC/PMS system. The CN-BC/PMS system has selective degradation of electron-rich pollutants, and the pollutants containing electron-donating groups are more easily degraded than those containing electron-withdrawing group. The selective degradation pathway of pollutants by CN-BC was further analyzed using density functional theory (DFT). Continuous flow CN-BC/PMS membrane system showed long-term abatement of emerging pollutants. This study improved understanding of the mechanism of PMS activation by cyanobacteria biochar catalysts and provided valuable information for the design of separated catalytic membranes with good stability and high catalytic activity. In addition, the acquisition of CN-BC membrane provides a new route for membrane-based domain-limited catalysis. © 2024, The Authors. All rights reserved.

关键词： Oxidation

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Nutritional Modulation of Pork Quality: Sid Lysine Levels Alter Carcass Characteristics, Meat Quality, and Flavor-Associated Metabolites in Growing-Finishing Pigs

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SSRN 2025年

作者： Pan, Junyi Han, Saipeng Wu, Qingyao Chen, Jiashun Huang, Ruilin Guo, Qiuping Hunan Provincial Key Laboratory for the Products Quality Regulation of Livestock and Poultry College of Animal Science and Technology Hunan Agricultural University Hunan Changsha410128 China Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Processes National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha410125 China

This study investigated the effects of dietary standard ileal digestible lysine (SID-Lys) levels on carcass characteristics, meat quality, and flavor-related metabolites in growing-finishing pigs. The data showed that, optimal SID Lys level has a significant improvement effect on L*45min, pH45min, n-3 polyunsaturated fatty acids, and bitter amino acids in the longissimus dorsi muscle. In addition, it also has a significant improvement effect on sweet amino acids, inosinic acid, and equivalent fresh taste concentration in soleus muscle. In addition, this level is also conducive to the enrichment of specific volatile compounds. According to various indexes, better meat quality and muscle flavor can be achieved by adjusting SID Lys content according to growth stage: 0.871% for 33-45 kg, 0.773% for 45-65 kg, 0.680% for 65-85 kg, 0.609% for 85-105 kg, and 0.543% for 105-125 kg. © 2025, The Authors. All rights reserved.

关键词： Polyunsaturated fatty acids

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Hepatic lipid metabolism is affected by a daily 3-meal pattern with varying dietary crude protein with a pig model

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Animal Nutrition 2020年第1期6卷 16-23页

作者： Chunyan Xie Xinyi Duan Cimin Long Xin Wu College of Bioscience and Biotechnology Hunan Agricultural UniversityChangsha 410128China Institute of Biological Resources Jiangxi Academy of SciencesNanchang 330096China Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of SciencesNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionHunan Provincial Engineering Research Center for Healthy Livestock and Poultry ProductionChangsha 410125China

The present study was conducted to evaluate the effects of 3 meals administered daily with varying dietary crude protein(CP)contents on hepatic lipid metabolism with a pig *** were divided into3 groups according to the following feeding patterns:feeding a basal CP diet 3 times daily(3 C);feeding a high CP diet for breakfast,the basal CP diet for lunch,and a low CP diet for dinner(HCL);and feeding the low CP diet for breakfast,the basal CP diet for lunch,and the high protein diet for dinner(LCH).Three groups took equivalent diet per meal ensuring that every pig was fed with similar dietary formulae *** showed that HCL feeding pattern reduced the relative kidney weight(P<0.05),and LCH feeding pattern increased the relative liver weight of pigs(P<0.05)when compared with those in the 3 C *** urea nitrogen(P<0.01)and lipase(P<0.05)decreased in the HCL group but increased in the LCH *** HCL and LCH feeding patterns reduced plasma triglycerides(P<0.01),non-esterified fatty acids(NEFA)(P<0.01),and hepatic crude fat(0.05

关键词： Daily 3-meal pattern Crude protein content Hepatic lipid metabolism Circadian clock Pigs

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Layered Double Hydroxides Nanosheets In-Situ Anchored on Ultrathin Mxenes for Enhanced U(Vi) and Eu(Iii) Trapping: Excavating from Selectivity to Mechanism

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SSRN 2022年

作者： Gu, Pengcheng Zhang, Sai Ma, Ran Sun, Mingtai Wang, Suhua Wen, Tao Wang, Xiangke School of Resources and Environment Anhui Agricultural University Hefei230036 China MOE Key Laboratory of Resources and Environmental System Optimization College of Environmental Science and Engineering North China Electric Power University Beijing102206 China Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Guangdong Maoming525000 China

As a rising star among two-dimensional materials, transition metal carbides (MXenes) with prominent characteristic including chemical functionality and high hydrophilic unfold enormous potential for radionuclide sequestration. The design of functionalized MXenes with high uptake capacity and excellent selectivity as well as outstanding anti-interference ability still remains a grand challenge. In this study, a novel MgAl-LDHs functionalized ultrathin Ti 3 C 2 T x MXene (L-TC) nanosheets with a typical flower-shaped structure was designed, and tested for U(VI) and Eu(III) elimination. The in-situ anchoring strategy of LDHs nanosheets provided an effective path for overcoming the demerits of limited layer space, insufficiency action sites and poor stability of pristine MXenes sheets. Adsorption measurements indicate that the higher porosity and diverse functional groups are conducive for L-TC materials to capture U(VI) and Eu(III). Impressively, L-TC exhibit exceptional trapping capacities toward U(VI) (241.0 mg g -1 ) and Eu(III) (97.1 mg g −1 ), which were significantly higher than those of the original Ti 3 C 2 T x and LDHs. More importantly, L-TC exhibited high uptake selectivity, fast rapid removal kinetics and excellent anti-ion interference. The enrichment mechanism is clearly elucidated and visualized by spectral analysis, revealing a unique U(VI) and Eu(III) uptake selectivity driven by metal-oxygen sites of L-TC via complexation action. This work highlights the bright future of the functional MXene materials in the application of radioactive contaminant, especially for the remediation of the high valence radioactive ions. © 2022, The Authors. All rights reserved.

关键词： Nanosheets

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Critical review of biochar for the removal of emerging inorganic pollutants from wastewater

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Chinese Chemical Letters 2025年第2期36卷 99-107页

作者： Chong Liu Nanthi Bolan Anushka Upamali Rajapaksha Hailong Wang Paramasivan Balasubramanian Pengyan Zhang Xuan Cuong Nguyen Fayong Li College of Water Resources and Architectural Engineering Tarim UniversityAlaer 843300China Department of Chemical&Materials Engineering University of AucklandAuckland 1010New Zealand UWA School of Agriculture and Environment The University of Western AustraliaPerthWestern Australia 6009Australia The UWA Institute of Agriculture The University of Western AustraliaPerthWestern Australia 6009Australia Ecosphere Resilience Research Center Faculty of Applied SciencesUniversity of Sri JayewardenepuraNugegoda 10250Sri Lanka Instrument Center Faculty of Applied SciencesUniversity of Sri JayewardenepuraNugegoda 10250Sri Lanka School of Environmental and Chemical Engineering Foshan UniversityFoshan 528000China Guangdong Provincial Key Laboratory of Integrated Agro-Environmental Pollution Control and Management Institute of Eco-Environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China Department of Biotechnology&Medical Engineering National Institute of Technology RourkelaRourkela 796008India Centre for Advanced Chemistry Institute of Research and DevelopmentDuy Tan UniversityDa Nang 550000Vietnam Faculty of Environmental Chemical Engineering Duy Tan UniversityDa Nang 550000Vietnam

Current research primarily focuses on emerging organic pollutants,with limited attention to emerging inorganic pollutants (EIPs).However,due to advances in detection technology and the escalating environmental and health challenges posed by pollution,there is a growing interest in treating waters contaminated with *** paper explores biochar characteristics and modification methods,encompassing physical,chemical,and biological approaches for adsorbing *** offers a comprehensive review of research advancements in employing biochar for EIPs remediation in water,outlines the adsorption mechanisms of EIPs by biochar,and presents an environmental and economic *** can be concluded that using biochar for the adsorption of EIPs in wastewater exhibits promising ***,it is noteworthy that certain EIPs like Au(III),Rh(III),Ir(III),Ru(III),Os(III),Sc(III),and Y(III),have not been extensively investigated regarding their adsorption onto *** comprehensive review will catalyze further inquiry into the biochar-based adsorption of EIPs,addressing current research deficiencies and advancing the practical implementation of biochar as a potent substrate for EIP removal from wastewater streams.

关键词： Biochar Emerging inorganic pollutants Adsorption Metal ions Emerging pollutants Removal Emerging contaminants

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Multi-Compartment Impact of Micropollutants and Particularly Antibiotics on Bacterial Communities Using Environmental DNA at River Basin-Level

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SSRN 2024年

作者： Inostroza, Pedro A. Jessen, Gerdhard L. Li, Feilong Zhang, Xiaowei Brack, Werner Backhaus, Thomas Department of Biological and Environmental Sciences University of Gothenburg Sweden Institute for Environmental Research RWTH Aachen University Germany Instituto de Ciencias Marinas y Limnológicas Universidad Austral de Chile Chile Center for Oceanographic Research COPAS COASTAL Universidad de Concepción Chile Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds School of Ecology Environment and Resources Guangdong University of Technology Guangzhou China State Key Laboratory of Pollution Control & Resource Reuse School of the Environment Nanjing University China UFZ Helmholtz Centre for Environmental Research Department of Effect-Directed Analysis Germany Department of Evolutionary Ecology and Environmental Toxicology Goethe University Frankfurt Germany

Microbial communities, in particular bacterial assemblies, play pivotal roles in sustaining biogeochemical processes within ecosystems. They are also responsible for the degradation of toxic chemicals, while the development of resistance against antimicrobial drugs jeopardises human health. Bacterial communities respond to environmental conditions with diverse structural and functional changes depending on their compartment (water, biofilm or sediment), type of environmental stress, and type of pollution to which they are exposed. In this study, we combined amplicon sequencing of bacterial 16S rRNA genes from water, biofilm, and sediment samples collected in the anthropogenically impacted River Aconcagua basin (Central Chile, South America), in order to evaluate whether micropollutants alter bacterial community structure and functioning based on the type and degree of chemical pollution. Furthermore, we evaluated the potential of bacterial communities from differently polluted sites to degrade contaminants. Our results show a lower diversity at sites impacted by agriculture and urban areas, featuring high loads of micropollution with pesticides, pharmaceuticals and personal care products as well as industrial chemicals. Nutrients, antibiotic stress, and micropollutant loads explain most of the variability in the sediment and biofilm bacterial community, showing a significant increase of bacterial groups known for their capabilities to degrade various organic pollutants, such as Nistrospira and also selecting for taxa known for antibiotic resistance such as Exiguobacterium and Planomicrobium. Moreover, potential ecological functions linked to the biodegradation of toxic chemicals at the basing level revealed significant reductions in ecosystem-related services in sites affected by agriculture and wastewater treatment plant (WWTP) discharges across all investigated environmental compartments. Finally, we suggest transitioning from simple concentration-based assessment

关键词： Biofilms

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Divalent cation contributions to the co-transport and deposition of functionalized multi-walled carbon nanotubes in porous media in the presence of bentonite or goethite nanoparticles: Experiment and simulation

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Journal of Hydrology 2023年第PartA期625卷

作者： Zhang, Miaoyue Bradford, Scott A. Klumpp, Erwin Šimůnek, Jiří Mo, Yijun Ding, Kengbo Wan, Quan Wang, Shizhong Jin, Chao Qiu, Rongliang School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Environ. Pollut. Control and Remediation Technology Sun Yat-sen University Guangzhou510006 China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou510642 China Unit 239 Hopkins Road UC Davis DavisCA95616 United States Forschungszentrum Jülich GmbH Jülich52425 Germany Department of Environmental Sciences University of California Riverside RiversideCA92521 United States Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety College of Natural Resources and Environment South China Agricultural University Guangzhou510642 China

This work investigates the influence of cation type (Ca2+ as compared to K+) on the co-transport and deposition of functionalized multi-walled carbon nanotubes (MWCNTs) with negatively (bentonite nanoparticles, BNPs) or positively (goethite nanoparticles, GNPs) charged natural nanoparticles under the same ionic strength (IS = 1 mM) conditions. In packed column tests with quartz sand (QS), the co-transport of MWCNTs was slightly increased by BNPs and inhibited by GNPs in both CaCl2 and KCl solutions, whereas the co-transport of BNPs or GNPs was facilitated by MWCNTs in both solutions. However, the co-transport of MWCNTs in the presence of BNPs or GNPs exhibited a different dependency on the cation type in quartz crystal microbalance with dissipation (QCM-D) tests. No deposition of MWCNTs and BNPs was observed in QCM-D studies in the presence of KCl, while enhanced deposition of MWCNTs and GNPs occurred in this same solution. In contrast, the deposition of both MWCNTs and BNPs or MWCNTs and GNPs increased in QCM-D in the presence of CaCl2. In both column and QCM-D studies, Ca2+ exhibited a more significant impact on co-transport than K+, especially for MWCNTs with GNPs than BNPs. Results from molecular dynamic simulations, aggregation studies, and interaction energy calculations indicate that non-DLVO interactions (e.g., H-bonding and cation-π interaction) between two nanoparticles (MWCNTs with BNPs or GNPs) played a non-negligible role in interpreting the deposition and co-transport in the presence of the divalent cation Ca2+. Mathematical modeling of breakthrough curves and retention profiles and aggregation results suggest that both straining and competitive blocking were enhanced and played dominant roles in the co-transport of MWCNTs in the presence of BNPs or GNPs in QS, especially in the presence of Ca2+. This work sheds novel insights on the contribution of divalent cations to interactions between two colloids and their co-transport in porous media. This infor

关键词： Deposition

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太平洋十年涛动对全球地表气温变化的影响足迹

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Science Bulletin 2024年第4期69卷 445-448页

作者：梁莉莉 Alan D.Ziegler 陈德亮 Philippe Ciais 李肇新梁时婧王大山徐荣嵘曾振中 School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China SUSTech Energy Institute for Carbon Neutrality Southern University of Science and TechnologyShenzhen 518055China Faculty of Fisheries Technology and Aquatic Resources Mae Jo UniversityChiang Mai 50000Thailand Regional Climate Group Department of Earth SciencesUniversity of GothenburgGothenburg 40530Sweden Laboratoire des Sciences du Climat et de l’Environnement UniversitéParis-SaclayGif-sur-Yvette 91191France Laboratoire de Météorologie Dynamique Centre national de la recherche scientifiqueSorbonne UniversitéÉcole Normale SupérieureÉcole PolytechniqueParis 75000France Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Sea surface temperature modes have been found to modulate anthropogenic global warming rates on annual and decadal timescales,sometimes leading to periods of“slowdown”despite increasing greenhouse gas emissions^([1]).

关键词：太平洋十年涛动地表气温 greenhouse

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