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Higher N_(2)O production in sequencing batch reactors compared to continuous stirred tank reactors:effect of feast-famine cycles

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Frontiers of Environmental Science & Engineering 2023年第4期17卷 143-154页

作者： Xinjie Yan Xunyu Shen Jipeng Wang Jinlong Zhuang Yu Wang Jinchi Yao Hong Liu Yongdi Liu James P.Shapleigh Wei Li National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery East China University of Science and TechnologyShanghai 200237China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China School of Environmental and Safety Engineering Changzhou UniversityChangzhou 213164China Shanghai Huayi Group Co.Ltd. Shanghai 201108China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200237China Department of Microbiology Cornell UniversityIthacaNY 14850USA

Nitrous oxide(N_(2)O)is a potent greenhouse gas that can be emitted during the biological treatment of *** this study,a comparison of the long-term performance characteristics and N_(2)O production of sequencing batch reactors(SBR)and continuous stirred tank reactors(CSTR)during nitrite-based denitrification was *** was found that both reactors had NO_(2)^(-)-N removal efficiencies over 99.9%,but the N_(2)O-N emissions from the SBR reached~2.3%of the removal nitrite-N load,while in the CSTR it never exceeded 0.1%.High frequency sampling during one operation cycle of the SBR demonstrated that the N_(2)O accumulation ratio was~0.1%during the feast period,increased to~1.9%in the first five hours of the famine period,and then gradually reached~2.3%at the end of *** experiments showed that limiting extracellular electron donor is required for N_(2)O accumulation in cells from the SBR-famine period and that cells from the CSTR do not accumulate N_(2)O when either nitrite or carbon is *** notable difference in the two reactor communities was the high level of accumulation of intracellular granules,most likely polyhydroxybutyrate(PHB),in cells during the feast period in the *** assembly and binning found that one genome(PRO1),which is a Thauera,accounted for over half the metagenomic reads in both *** shifts in gene regulation nor community composition explained the observed differences in reactor performance suggesting some post-transcriptional regulation obligatorily linked to antecedent conditions underly increased N_(2)O production in the SBR.

关键词： Denitrifying N_(2)O mitigation SBR CSTR meta-omics PHB

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Ruminal microbiota-host interaction and its effect on nutrient metabolism

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Animal Nutrition 2021年第1期7卷 49-55页

作者： Kaizhen Liu Yangdong Zhang Zhongtang Yu Qingbiao Xu Nan Zheng Shengguo Zhao Guoxin Huang Jiaqi Wang State Key Laboratory of Animal Nutrition Institute of Animal ScienceChinese Academy of Agricultural SciencesBeijingChina Department of Animal Sciences The Ohio State UniversityUSA College of Animal Sciences and Technology Huazhong Agricultural UniversityWuhanChina

Rumen microbiota has a close and intensive interaction with the *** residing in the rumen digests and ferments plant organic matters into nutrients that are subsequently utilized by the host,making ruminants a unique group of animals that can convert plant materials indigestible by humans into high-quality animal protein as meat and *** studies using meta-omics technologies have demonstrated the relationships between rumen microbiome and animal phenotypes associated with nutrient ***,the causality and physiological mechanisms underpinning the host-microbiota interactions have attracted tremendous research interest among *** review discusses the host-microbiota interactions and the factors affecting these interactions in ruminants and provides a summary of the advances in research on animal *** the microbiota composition,the functions of key bacteria,and the host-microbiota interaction is crucial for the development of knowledge-based strategies to enhance animal productivity and host health.

关键词： Microbiota Host-microbiota interaction meta-omics Nutrient metabolism Productivity

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The correlation between gut microbiome and atrial fibrillation: pathophysiology and therapeutic perspectives

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Military Medical Research 2024年第5期11卷 697-716页

作者： Na Li Ling Wang Lei Li Meng-Zhao Yang Qing-Xiang Wang Xi-Wen Bai Feng Gao Yi-Qiang Yuan Zu-Jiang Yu Zhi-Gang Ren Department of Infectious Diseases the First Affiliated Hospital of Zhengzhou UniversityZhengzhou450052China Jinan Microecological Biomedicine Shandong Laboratory Jinan250000China Department of Cardiovascular Medicine Henan Provincial Chest HospitalZhengzhou450008China Department of Blood Collection Xuchang Blood CenterXuchang461000HenanChina Nanchang University Queen Marry School Nanchang330036China

Regulation of gut microbiota and its impact on human health is the theme of intensive *** incidence and prevalence of atrial fibrillation(AF)are continuously escalating as the global population ages and chronic disease survival rates increase;however,the mechanisms are not entirely *** is gaining awareness that alterations in the assembly,structure,and dynamics of gut microbiota are intimately engaged in the AF *** to advancements in next-generation sequencing technologies and computational strategies,researchers can explore novel linkages with the genomes,transcriptomes,proteomes,and metabolomes through parallel meta-omics approaches,rendering a panoramic view of the culture-independent microbial *** this review,we summarized the evidence for a bidirectional correlation between AF and the gut ***,we proposed the concept of“gut-immune-heart”axis and addressed the direct and indirect causal roots between the gut microbiome and *** intricate relationship was unveiled to generate innovative microbiota-based preventive and therapeutic interventions,which shed light on a definite direction for future experiments.

关键词： Atrial fibrillation(AF) Gut microbiome meta-omics metabolites Immunity

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Decoding the fruit microbiome:A climate smart strategy to manage postharvest decays

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Horticultural Plant Journal 2024年第5期10卷 1061-1072页

作者： Manori Kuruppu Kong Lih Ling Phebe Ding Khairulmazmi Ahmad Asgar Ali Yasmeen Siddiqui Laboratory of Sustainable Agronomy and Crop Protection Institute of Plantation StudiesUniversiti Putra MalaysiaSerdang 43400Malaysia Department of Plant Protection Faculty of AgricultureUniversiti Putra MalaysiaSerdang 43400Malaysia Centre of Excellence for Post-harvest Biotechnology(CEFB) School of BiosciencesUniversity of Nottingham MalaysiaJalan Broga43500 SemenyihSelangorMalaysia Department of Biological Sciences College of ScienceKing Faisal UniversityAl Ahsa31982Saudi Arabia

There is an urgent necessity to shift our diets toward those rich in fruits and vegetables and at reduce postharvest losses of *** 20%-50%of fruits and vegetables are lost due to poor postharvest handling and pathogen infections in developing countries while it was estimated as 5%-35%in developed countries. Fresh fruits have evolved with a plethora of microorganisms having important roles in maintaining fruit health. However, little information is available on the dynamics, structure, and functional capacities of underpinning fruit microbiomes. The present review discussed environmental conditions favoring fruit-harbored antagonists and their different modes of action for suppressing postharvest pathogens in fruits. It also provides information on omics technologies such as next-generation sequencing (NGS),metaproteomics, metatranscriptomic, and metabolomics studies to characterize fruit microbiomes. With the advent of NGS and meta-omics technologies, microbiome research could bring remarkable development and understanding in succeeding biological treatments. In addition, they may provide us with a fundamental understanding of microclimate requirements for fruit microbiome establishment and microbiome shifts during post-harvest storage, which would be advantageous in developing composite biocontrol treatments for post-harvest decay management.

关键词： Biological control Food loss Fruit microbiome meta-omics Microclimate Postharvest decay

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