Publications by authors named "Yayong Liu"

(Thunb.) Ser. is one of the widely cultivated plants in home gardens and scenic areas of China.

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Promoting the availability of silage with a high protein content on farms can lead to profitable and sustainable ruminant production systems. Whole plant soybean ( L. Merrill, WPS) is a promising high-protein forage material for silage production.

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Multiple gastrointestinal disorders are associated with impaired gut microbiota. Probiotic can improve bowel disorder, however, the action mechanism is poorly understood. We integrated multi-omics data from the gut metagenome, metabolome, and colon transcriptome of constipated mice underlying LRJ-1 treatment to provide insights into host-microbial metabolic pathway.

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Verticillium wilt caused by Kleb. is a lethal soil-borne fungal disease of . The plant endophytic microbiome plays an important role in maintaining plant health and disease resistance, but it is unclear how the endophytic microbiome of roots varies in response to Verticillium wilt occurrence.

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Urban environments are recognized as main anthropogenic contributors to greenhouse gas (GHG) emissions, characterized by unevenly distributed emission sources over the urban environments. However, spatial GHG distributions in urban regions are typically obtained through monitoring at only a limited number of locations, or through model studies, which can lead to incomplete insights into the heterogeneity in the spatial distribution of GHGs. To address such information gap and to evaluate the spatial representation of a planned GHG monitoring network, a custom-developed atmospheric sampler was deployed on a UAV platform in this study to map the CO and CH mixing ratios in the atmosphere over Zhengzhou in central China, a megacity of nearly 13 million people.

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Monitoring of volatile organic compounds (VOCs) in air is crucial for understanding their atmospheric impacts and advancing their emission reduction plans. This study presents an innovative integrated methodology suitable for achieving semireal-time high spatiotemporal resolution three-dimensional measurements of VOCs from ground to hundreds of meters above ground. The methodology integrates an active AirCore sampler, custom-designed for deployment from unmanned aerial vehicles (UAV), a proton-transfer-reaction mass spectrometry (PTR-MS) for sample analysis, and a data deconvolution algorithm for improved time resolution for measurements of multiple VOCs in air.

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Article Synopsis
  • The study investigates the impact of foliar anthracnose on an important evergreen shrub in urban landscapes, identifying eight species of fungi that cause the disease in Beijing, China, over two years.
  • A total of 194 fungal isolates were collected, with the most prevalent species being identified, including three that are newly recognized as anthracnose agents globally.
  • The research also highlights the effectiveness of five fungicides with low effective concentration values, suggesting a potential for their use in managing anthracnose and emphasizes the importance of avoiding mechanical damage to the shrubs to prevent infection.
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Cold heavy oil production with sand (CHOPS) is an extraction process for heavy oil in Canada, with the potential to lead to higher CH venting than conventional oil sites, that have not been adequately characterized. In order to quantify CH emissions from CHOPS activities, a focused aerial measurement campaign was conducted in the Canadian provinces of Alberta and Saskatchewan in June 2018. Total CH emissions from each of 10 clusters of CHOPS wells (containing 22-167 well sites per cluster) were derived using a mass balance computation algorithm that uses in situ wind data measurement on board aircraft.

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Listeria monocytogenes is an important pathogen which easily contaminates food and causes fatal systemic infections in human. Bacteriocins have received much attention regarding their natural methods of controlling health-related pathogens. Here, we investigated and characterized a novel two-component bacteriocin named acidicin P from Pediococcus acidilactici LAC5-17.

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Forest fire research over the last several decades has improved the understanding of fire emissions and impacts. Nevertheless, the evolution of forest fire plumes remains poorly quantified and understood. Here, a Lagrangian chemical transport model, the Forward Atmospheric Stochastic Transport model coupled with the Master Chemical Mechanism (FAST-MCM), has been developed to simulate the transport and chemical transformations of plumes from a boreal forest fire over several hours since their emission.

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  • The study examines the effectiveness of intercropping Lablab and sweet sorghum for silage in saline-alkaline areas, focusing on microbial fermentation mechanisms and silage quality.
  • Treatments involved different sowing ratios (1:1, 5:1, 9:1) and inoculation with lactic acid bacteria (LP), which significantly impacted fermentation by increasing lactic acid and lowering pH and ammonia-N levels.
  • Results indicate that higher ratios of Lablab with LP inoculation enhance silage quality, leading to better nutritional preservation and proving beneficial for producing protein-rich feed in challenging agricultural conditions.
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  • The study focused on using Lonicera japonica Thunb. (LJT) residues, which are often discarded despite containing beneficial metabolites, by applying anaerobic fermentation techniques.
  • The fermentation process lowered pH levels, reduced harmful bacteria, and increased beneficial Lactobacillus, while the addition of compounds enhanced fermentation quality, nutrient content, and microbial diversity.
  • Changes were observed in the chemical composition of LJT residues, particularly in flavonoids, alkaloids, and phenols, suggesting that the fermentation method primarily modified the microbial community with only slight impacts on the overall metabolites.
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Protein-rich Sesbania cannabina and sugar-rich sweet sorghum [Sorghum dochna (Forssk.) Snowden] are characterized by their higher tolerance to saline-alkaline stresses and simultaneous harvests. They could be utilized for coensiling because of their nutritional advantages, which are crucial to compensate protein-rich forage in saline-alkaline regions.

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The gut microbes interact with each other as well as host, influencing human health and some diseases. Many gut commensals and food originated bacteria produce bacteriocins which can inhibit pathogens and modulate gut microbiota. Bacteriocins have comparable narrow antimicrobial spectrum and are attractive potentials for precision therapy of gut disorders.

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Article Synopsis
  • Sesbania cannabina (SC) and Sweet sorghum (SS) are protein-rich plants that grow well in saline-alkali soils, serving as high-nutrition forage sources, particularly when mixed into silage.
  • The study examined how lactic acid bacterial (LAB) inoculants impact the silage quality, fermentation processes, and microbial communities in mixed silage of SC and SS over a 60-day period.
  • Results showed that LAB inoculation enhanced fermentation quality by increasing beneficial lactic acid and decreasing harmful components, while also promoting the presence of bioactive metabolites with potential health benefits, suggesting ways to improve forage quality and livestock nutrition.
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  • Lanthipeptides are antimicrobial compounds with promising use in food preservation, but accessing their bioactive forms and the strains that produce them is challenging.* -
  • The researchers developed a high-throughput strategy called Metagenomic Mining of Isolates Population (MMIP), which combines isolating bacteria, mining for lanthipeptide genes, and identifying their producers.* -
  • The study identified 928 biosynthetic gene clusters, including several promising lanthipeptide producers and demonstrated effective antimicrobial activity against common food spoilage bacteria.*
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Nisin Z is a possible alternative for treating bovine mastitis by inhibiting mastitis-causing pathogens and having anti-inflammatory activity. However, the anti-inflammatory mechanism of nisin Z on mastitis is unknown. Our study aimed to investigate the mechanisms of nisin Z on mastitis.

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Due to the challenges of antibiotic resistance to global health, bacteriocins as antimicrobial compounds have received more and more attention. Bacteriocins are biosynthesized by various microbes and are predominantly used as food preservatives to control foodborne pathogens. Now, increasing researches have focused on bacteriocins as potential clinical antimicrobials or immune-modulating agents to fight against the global threat to human health.

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Atmospheric deposition of iron (Fe) can increase marine primary productivity, consequently affect ocean biogeochemical cycles and climate change. In this study, we develop an adaptor to generate anthropogenic Fe emission inventories for China in 2012 and 2016 via anthropogenic PM emissions from Multi-resolution Emission Inventory for China (MEIC) using local source-specific mass fractions of Fe in PM. Using the generated emission inventories, we simulated Fe concentrations as well as dry deposition fluxes to China marginal seas using a WRF-CMAQ model during four campaign periods.

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Background: Alfalfa () is an important forage material widely used for animal feed production. Ensiling is an effective method for preserving alfalfa, but it has shown some limitations in the production of high-quality alfalfa silage due to its low water soluble carbohydrates (WSC) content and high buffering capacity. Lactic acid bacteria (LAB) and cellulase are often used as silage additives to promote the ensiling process and enhance fermentation quality.

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is a widespread bacterial species and is commonly used as a probiotic. PFM105 was isolated from the rectum of a healthy sow. Here we found that PFM105 showed probiotic effect on weaning piglets in which intestinal inflammation and unbalanced gut microbiota happened frequently.

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Enterotoxigenic Escherichia coli (ETEC) is a leading cause of infectious diarrhea in children and postweaning piglets. ETEC infection results in induced pro-inflammatory responses in intestinal epithelial cells and dysbiosis of intestinal microbiota. Here, a Lactobacillus reuteri strain, HCM2, isolated from a healthy piglet showed a high survival rate in the harsh gastrointestinal tract environment and inhibited the growth of ETEC and its adherence to intestinal epithelial cells.

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Heavy metals are concerned for its adverse effect on human health and long term burden on biogeochemical cycling in the ecosystem. In this study, a provincial-level emission inventory of 13 kinds of heavy metals including V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Sn, Sb, Ba and Pb from 10 anthropogenic sources was developed for China, based on the 2015 national emission inventory of primary particulate matters and source category-specific speciation profiles collected from 50 previous studies measured in China. Uncertainties associated with the speciation profiles were also evaluated.

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By bioinformatics analysis, a putative keratinase gene gm2886 (Accession number: KY368946) was discovered in the genome of a feather-degrading strain, Streptomyces albidoflavus Fea-10. gm2886 was ligated into integrative Escherichia coli-Streptomyces shuttle vector pSET152 under the promoter PermE and added with C-terminal His-tag. The expression vector was transformed into Streptomyces pactum ACT12 by conjugal transfer and the recombinant protein GM2886-His6 was detected in fermentation broth.

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Article Synopsis
  • The study utilizes small angle X-ray scattering (SAXS) to analyze the structure of vertically aligned multiwall carbon nanotube (MWCNT) arrays.
  • By examining SAXS intensity at different angles, researchers assess the degree of alignment and identify two distinct morphologies across different heights of the CNT arrays.
  • Findings indicate that the average diameter of the MWCNTs increases as one moves further away from the substrate, highlighting real variations in CNT sizes through model fitting.
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