Publications by authors named "Xinyu Xie"

36 Publications

Supercapacitive brophene-graphene aerogel as elastic-electrochemical dielectric layer for sensitive pressure sensors.

J Colloid Interface Sci 2021 May 25;601:355-364. Epub 2021 May 25.

Science and Technology Institute, Hubei Key Laboratory of Advanced Textile Materials & Application, Laboratory for Electron Microscopy, Wuhan Textile University, Wuhan 430073, Hubei, People's Republic of China.

A sensitive pressure sensor based on ultralight and superelastic supercapacitive borophene-graphene aerogel as dielectric layer is reported. The borophene-graphene aerogel not only combines large specific surface area of reduced graphene oxide and high conductivity of borophene, but also exhibits rich porous structure. The strong synergy and intercalation between two different two-dimensional materials benefit electron transfer and electrolyte ion diffusion. On the one hand, the aerogel exhibits greater mass specific capacitance of 330 F g than pure graphene aerogel. More importantly, serving as dielectric layer for pressure sensors with a symmetrical structure, the sensor represents ultra-high sensitivity (0.90 KPa) in the pressure range (<3 KPa), ultra-rapid response time (~110 ms), ultra-low detection limit as 8.7 Pa and excellent working stability after 1000 cycles. In practical application, the sensor demonstrates great performance in monitoring human physiological signals, and agricultural applications.
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http://dx.doi.org/10.1016/j.jcis.2021.05.116DOI Listing
May 2021

The genome sequence of star fruit (Averrhoa carambola).

Hortic Res 2020 Jun 1;7(1):95. Epub 2020 Jun 1.

Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.

Oxalidaceae is one of the most important plant families in horticulture, and its key commercially relevant genus, Averrhoa, has diverse growth habits and fruit types. Here, we describe the assembly of a high-quality chromosome-scale genome sequence for Averrhoa carambola (star fruit). Ks distribution analysis showed that A. carambola underwent a whole-genome triplication event, i.e., the gamma event shared by most eudicots. Comparisons between A. carambola and other angiosperms also permitted the generation of Oxalidaceae gene annotations. We identified unique gene families and analyzed gene family expansion and contraction. This analysis revealed significant changes in MADS-box gene family content, which might be related to the cauliflory of A. carambola. In addition, we identified and analyzed a total of 204 nucleotide-binding site, leucine-rich repeat receptor (NLR) genes and 58 WRKY genes in the genome, which may be related to the defense response. Our results provide insights into the origin, evolution and diversification of star fruit.
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http://dx.doi.org/10.1038/s41438-020-0307-3DOI Listing
June 2020

Continuous insulation strategy of organic waste composting in cold region: Based on cold-adapted consortium.

Bioresour Technol 2021 Sep 7;335:125257. Epub 2021 May 7.

College of Life Science, Northeast Agricultural University, Harbin 150030, China. Electronic address:

Compost is a self-heating process for organic waste. Microbes are the main executors in composting process. However, due to low temperature in winter and low efficiency of composting, a lot of heat is lost in composting. In this study, taking-out and feed-batch composting method (TFC) can supplement nutrition and improve composting microenvironment. Compared with NC, the amount of carbohydrates, protein and fat decomposed by TFC increase by 56.8%, 237% and 122%, respectively, in the composting start-up period (0-100 h). Structure and function of microbial community have changed due to stimulation of cold-adapted consortium. In addition, this study shows that core bacteria stimulate cooperation among different bacteria in the organic components metabolism networks. Finally, based on the important role of cold-adapted consortium, the sustainable heating strategy of composting system is put forward, which converts organic wastes into released heat for daily heating and hot water preparation, leading role of cold-adapted consortium.
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http://dx.doi.org/10.1016/j.biortech.2021.125257DOI Listing
September 2021

Influence of Alkalinization Over Metal Organic Frameworks MIL-100(Fe) for Enhanced Volatile Organic Compounds (VOCs) Adsorbents.

J Nanosci Nanotechnol 2021 11;21(11):5510-5521

School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, China.

Substantial attempts have been undertaken for the improvement of the air quality over decades; and Volatile Organic Compounds (VOCs) from the chemical and textile industries are truly listed as severe issue to be controlled. To come up with modus operandi for this issue, a novel composite of metal organic frameworks (MOFs) MIL-100(Fe) with salient tuned features of natrite was designed by a green and facile method. Mineralized composite MOFs exhibited enhanced crystallinity than pure MIL-100(Fe) as well showcased a higher surface area of 1300 m² g. Through dynamic acetone pressure swing adsorption setup, MIL-0.05Na (MIL-100(Fe) synthesized with 0.05 mM Na₂CO₃ solution) revealed an enhanced acetone adsorption of 210 mg g at room temperature. Gas phase adsorption isotherms confirmed the mono layer adsorption behavior. The kinetics models evaluated that the external mass transfer was the rate limiting step for surface adsorption. The thermodynamic study manifested that the adsorption reaction was spontaneous and exothermic. The proposed mechanism of adsorption was the act of physisorption which enriched the adsorbents reusability. This research work provides a futuristic vista to design mineralized Fe-MOFs composites for an energy saving adsorbents for VOCs removal.
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http://dx.doi.org/10.1166/jnn.2021.19474DOI Listing
November 2021

BCCT: A GUI Toolkit for Brain Structural Covariance Connectivity Analysis on MATLAB.

Front Hum Neurosci 2021 20;15:641961. Epub 2021 Apr 20.

College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

Brain structural covariance network (SCN) can delineate the brain synchronized alterations in a long-range time period. It has been used in the research of cognition or neuropsychiatric disorders. Recently, causal analysis of structural covariance network (CaSCN), winner-take-all and cortex-subcortex covariance network (WTA-CSSCN), and modulation analysis of structural covariance network (MOD-SCN) have expended the technology breadth of SCN. However, the lack of user-friendly software limited the further application of SCN for the research. In this work, we developed the graphical user interface (GUI) toolkit of brain structural covariance connectivity based on MATLAB platform. The software contained the analysis of SCN, CaSCN, MOD-SCN, and WTA-CSSCN. Also, the group comparison and result-showing modules were included in the software. Furthermore, a simple showing of demo dataset was presented in the work. We hope that the toolkit could help the researchers, especially clinical researchers, to do the brain covariance connectivity analysis in further work more easily.
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http://dx.doi.org/10.3389/fnhum.2021.641961DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8093864PMC
April 2021

δ-MnO changed the structure of humic-like acid during co-composting of chicken manure and rice straw.

Waste Manag 2021 Jun 3;128:16-24. Epub 2021 May 3.

College of Life Science, Northeast Agricultural University, Harbin 150030, China.

Improving the structure and quantity of humus is important to reduce agriculture organic waste by composting. The present study was aimed to assess the role of δ-MnO on humus fractions formation during co-composting of chicken manure and rice straw. Two tests (control group (CK), the addition of δ-MnO (M)) were carried out. The results showed that organic matter content decreased by 34% and 29% at M and CK, suggesting the process of organic waste disposal was accelerated by adding δ-MnO. The structures and quantity of fulvic acid (FA) and humic acid (HA) (as the main fractions of humus) were investigated. The δ-MnO had no significant effect on improving the concentration of FA and HA (p > 0.05). However, the addition of δ-MnO caused different effects on the FA and HA structure. The humification degree of FA improved, while bioavailability of HA increased through adding δ-MnO. The addition of δ-MnO rephased the bacterial community structure, slowing down the succession rate of the bacterial community in M composting. After adding δ-MnO the structural equation modeling results showed that environmental factors could directly drive changes in FA and HA by modulating the bacterial community. Furthermore, the role of FA and HA in the soil amendment was also demonstrated. Therefore, the addition of MnO might be promising for agriculture organic waste treatment and environmental repair during composting.
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http://dx.doi.org/10.1016/j.wasman.2021.04.039DOI Listing
June 2021

Anti-seizure medication correlated changes of cortical morphology in childhood epilepsy with centrotemporal spikes.

Epilepsy Res 2021 Jul 23;173:106621. Epub 2021 Mar 23.

Department of Medical Imaging, Jinling Hospital, The First School of Clinical Medicine, Southern Medical University, Nanjing, 210002, China; Department of Medical Imaging, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, China; State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, 210093, China; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, 149 Thirteenth Street, Suite 2301, Charlestown, MA, 02129, USA. Electronic address:

To investigate the morphological changes of cerebral cortex correlating with anti-seizure medication in Childhood Epilepsy with Centrotemporal Spikes (CECTS), and their relationships with seizure control. This study included a total of 188 children, including 62 patients with CECTS taking anti-seizure drugs, 56 patients with drug-naive, and 70 healthy controls. A portion of cases were also followed-up for longitudinal analysis. Cortical morphological parameters were quantitatively measured by applying surface-based morphometry analysis to high-resolution three-dimension T1 weighted images. Among the three groups, the morphological indices were compared to quantify any cortical changes affected by seizures and medication. The relationships among anti-seizure medication, seizure controls and cortical morphometry were investigated using causal mediator analysis. The Rolandic cortex of the drug-naive patients showed abnormal cortical thickness by comparing with that of healthy controls, and thinning by comparing with that of patients with medication. The cortical thickness in the Rolandic regions was negatively correlated with duration of medication and duration of seizure-free. Longitudinal analysis further demonstrated that the thickness of Rolandic cortex thinned in post-medication state relative to the pre-medication state. Mediation analysis revealed that morphological alteration of the Rolandic cortex might act as a mediator in the path of anti-seizure medication on seizure control. Our findings highlighted that anti-seizure medication was associated with regression of abnormal increment of cortical thickness in the Rolandic regions in CECTS. The neuroanatomical alteration might be a mediating factor in the process of seizure control by anti-seizure medication.
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http://dx.doi.org/10.1016/j.eplepsyres.2021.106621DOI Listing
July 2021

Manganese dioxide driven the carbon and nitrogen transformation by activating the complementary effects of core bacteria in composting.

Bioresour Technol 2021 Jun 11;330:124960. Epub 2021 Mar 11.

College of Life Science, Northeast Agricultural University, Harbin 150030, China.

This study revealed core bacterial metabolic mechanisms involved in carbon (C) and nitrogen (N) in composting with adding MnO. Two tests (control group (CK), adding MnO (M)) were performed. The results indicated that the MnO accelerated the transformation of carbon and nitrogen in composting. Core bacteria involved in the C and N conversion were identified, the complementarity effects of core bacteria were stimulated in M composting. Additionally, the influence of core bacteria on the C and N conversion could be divided into two pathways in M composting. One was that core bacteria promoted C and N conversion by accelerating the flow of amino acids into the tricarboxylic acid cycle. Another was that the complementarity effects of core bacteria increased the overall bacterial diversity, which contributed to C and N conversion. These findings showed that the addition of MnO to composting was a promising application to treat agricultural organic waste.
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http://dx.doi.org/10.1016/j.biortech.2021.124960DOI Listing
June 2021

Cortico-striato-thalamo-cerebellar networks of structural covariance underlying different epilepsy syndromes associated with generalized tonic-clonic seizures.

Hum Brain Mapp 2021 Mar 29;42(4):1102-1115. Epub 2020 Dec 29.

Department of Medical Imaging, Jinling Hospital, Medical school of Nanjing University, Nanjing, China.

Generalized tonic-clonic seizures (GTCS) are the severest and most remarkable clinical expressions of human epilepsy. Cortical, subcortical, and cerebellar structures, organized with different network patterns, underlying the pathophysiological substrates of genetic associated epilepsy with GTCS (GE-GTCS) and focal epilepsy associated with focal to bilateral tonic-clonic seizure (FE-FBTS). Structural covariance analysis can delineate the features of epilepsy network related with long-term effects from seizure. Morphometric MRI data of 111 patients with GE-GTCS, 111 patients with FE-FBTS and 111 healthy controls were studied. Cortico-striato-thalao-cerebellar networks of structural covariance within the gray matter were constructed using a Winner-take-all strategy with five cortical parcellations. Comparisons of structural covariance networks were conducted using permutation tests, and module effects of disease duration on networks were conducted using GLM model. Both patient groups showed increased connectivity of structural covariance relative to controls, mainly within the striatum and thalamus, and mostly correlated with the frontal, motor, and somatosensory cortices. Connectivity changes increased as a function of epilepsy durations. FE-FBTS showed more intensive and extensive gray matter changes with volumetric loss and connectivity increment than GE-GTCS. Our findings implicated cortico-striato-thalamo-cerebellar network changes at a large temporal scale in GTCS, with FE-FBTS showing more severe network disruption. The study contributed novel imaging evidence for understanding the different epilepsy syndromes associated with generalized seizures.
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http://dx.doi.org/10.1002/hbm.25279DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7856655PMC
March 2021

Oxytetracycline stress reconstruct the core microbial community related to nitrogen transformation during composting.

Bioresour Technol 2021 Jan 18;319:124142. Epub 2020 Sep 18.

Heilongjiang Province Environmental Science Research Institute, Harbin 150056, China.

This study investigated oxytetracycline (OTC) effects on nitrogen (N) transformation and bacterial community diversity during chicken manure composting. The addition of OTC inhibited nitrifying bacteria, resulted in a decrease in the transformation of NH-N to NO-N during composting, and affected in the order T3 (32.76%) > T2 (28.76%) > T1 (17.02%) > CK. The OTC could act as an inhibitor against core microbial growth, leading to a delay effect during composting. 16S rRNA sequencing was employed for the functional prediction, and results indicated the bacterial community related to N transformation reconstructed under OTC stress. The core microorganisms were changed after OTC addition, with the emergence of Bacillus and Thermobifida, which could inhibit the N transformation by network analysis. Therefore, core microorganisms could be regulated to reduce the negative of OTC impacts on N transformation and thus reduce N loss during composting.
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http://dx.doi.org/10.1016/j.biortech.2020.124142DOI Listing
January 2021

Modified montmorillonite and illite adjusted the preference of biotic and abiotic pathways of humus formation during chicken manure composting.

Bioresour Technol 2021 Jan 13;319:124121. Epub 2020 Sep 13.

Heilongjiang Province Environmental Monitoring Centre, Harbin 150056, China.

The study aimed to identify the preference of pathways of humus formation. Five lab-scale composting experiments were established: the control (CK), montmorillonite addition (M), illite addition (I), thermal treatment montmorillonite addition (M-) and thermal treatment illite addition (I-). Results showed humus content was increased by 11.5%, 39.3%, 37.2%, 30.9% and 27.6% during CK, M-, M, I- and I composting. Meanwhile, Redundancy analysis indicated the bands of bacteria community related to humic acid (HA) were more abundant in the M- and I- treatments. Furthermore, structural equation model and variance partitioning analysis demonstrated that M- and I- treatments promoted precursors to synthesize HA by coordinated regulation of biotic pathway and abiotic pathway, the increase of HA in the M and I treatments mainly through the abiotic pathway. In summary, an effective method was proposed to improve humus production by adjusting the preference of biotic and abiotic pathways of humus formation.
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http://dx.doi.org/10.1016/j.biortech.2020.124121DOI Listing
January 2021

Effects of organic matter components and incubation on the cement-based stabilization/solidification characteristics of lead-contaminated soil.

Chemosphere 2020 Dec 11;260:127646. Epub 2020 Jul 11.

Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, 310058, China; Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China.

Stabilization/solidification (S/S) has been studied since 1950s and widely used for the treatment of potentially toxic elements (PTEs). The coexistence of organic matter (OM) and PTEs can cause a very complicated mechanism for cement-based S/S applications and bring challenges from both scientific and engineering perspectives. To fill in the knowledge gap, this paper investigates for the first time the effects on S/S characteristics of OM components and incubation, which are the two main factors that result in the inconsistency in the leaching characteristics from the available studies. OM samples with different components (humic acid (HA) and fulvic acid (FA)) and contents were mixed into lead-contaminated soil and incubated for different durations of up to 90 days. The experimental results show that the strength of stabilized soils increases with increasing incubation duration and the lead leaching concentration of stabilized soils is decreased by 60.7%-83.6% from zero to 90 days. The lead leaching concentration of the HA group, which is 144.0% higher with no incubation than the non-OM group, becomes 58.3% lower with 90 days of incubation. The leaching concentration of the FA group remains much higher than those of the other groups. Finally, a competing mechanism of HA-weakening cement hydration reactions and stabilizing lead with a critical incubation duration of 14 days-is proposed, together with a cooperating mechanism of FA-weakening cement hydration reactions and releasing lead.
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http://dx.doi.org/10.1016/j.chemosphere.2020.127646DOI Listing
December 2020

The genome sequence of star fruit ().

Hortic Res 2020 1;7:95. Epub 2020 Jun 1.

Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002 China.

Oxalidaceae is one of the most important plant families in horticulture, and its key commercially relevant genus, , has diverse growth habits and fruit types. Here, we describe the assembly of a high-quality chromosome-scale genome sequence for (star fruit). distribution analysis showed that underwent a whole-genome triplication event, i.e., the gamma event shared by most eudicots. Comparisons between and other angiosperms also permitted the generation of Oxalidaceae gene annotations. We identified unique gene families and analyzed gene family expansion and contraction. This analysis revealed significant changes in MADS-box gene family content, which might be related to the cauliflory of . In addition, we identified and analyzed a total of 204 nucleotide-binding site, leucine-rich repeat receptor (NLR) genes and 58 WRKY genes in the genome, which may be related to the defense response. Our results provide insights into the origin, evolution and diversification of star fruit.
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http://dx.doi.org/10.1038/s41438-020-0307-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7261771PMC
June 2020

Study on the Mechanical Properties of Bionic Protection and Self-Recovery Structures.

Materials (Basel) 2020 Jan 15;13(2). Epub 2020 Jan 15.

Beijing Huashengyang Hi-Tech Co., Ltd., Beijing 100000, China.

A novel protective structure, based on shrimp chela structure and the shape of odontodactylus scyllarus, has been shown to improve impact resistance and energy absorption. A finite element model of NiTi alloy with shape memory was constructed based on the basic principles of structural bionics. The protective structure utilizes NiTi alloy as the matrix, a material with many advantages including excellent compression energy absorption, reusability after unloading, and long life. The mechanical properties of the single-layer model were obtained by static crushing experiments and numerical simulations. Building upon the idea of the monolayer bionic structure design, a two-layer structure is also conceived. Both single-layer and double-layer structures have excellent compression energy absorption and self-recovery capabilities. Compared with the single-layer structure, the double-layer structure showed larger compression deformation and exhibited better energy absorption capacity. These results have important academic and practical significance for improving the impact resistance of protective armor. Our study makes it possible to repair automatic rebounds under the action of pressure load and improves the endurance and material utilization rate of other protective structures.
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http://dx.doi.org/10.3390/ma13020389DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013465PMC
January 2020

Engineering magnetic N-doped porous carbon with super-high ciprofloxacin adsorption capacity and wide pH adaptability.

J Hazard Mater 2020 04 9;388:122059. Epub 2020 Jan 9.

Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China. Electronic address:

We report a high performance magnetic N-doped nanoporous carbon (MNPC) adsorbent synthesized by a simple single-step pyrolysis protocol. Grinding the mixture of ZnO nanoparticles, cobalt hydroxide and 2-methylimidazole produced Zn/Co-ZIFs that were converted into MNPC following subsequent pyrolysis in N atmosphere. The optimized MNPC-700-0.4 adsorbent, obtained at 700 °C with Co/(Zn + Co) molar ratio of 0.4, is featured with super-high ciprofloxacin (CIP) adsorption capacity of 1563.7 mg g at 25 °C, fast adsorption dynamics (1.5 h of adsorption equilibrium time), wide pH adaptability (almost unchanged CIP adsorption capacity in pH 4-10), and good magnetic property. The magnetic property and CIP adsorption performance can be easily regulated by modulating the molar ratio of Co/(Zn + Co) and the pyrolysis temperature. The optimal MNPC-700-0.4 was chosen to explore adsorption kinetics and isotherm. The effects of pH, ionic strength and humic acid on CIP adsorption were investigated. CIP adsorption obeyed pseudo-second-order kinetics and well fitted the Langmuir adsorption model. The favorable textural properties (high surface area and pore volume), riched nitrogen structure and large amounts of defects endow the MNPC-700-0.4 lots of sites for CIP adsorption. The CIP adsorption onto MNPC-700-0.4 was mainly controlled by the electrostatic interaction, hydrophobic interaction, π-π stacking and hydrogen bond.
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http://dx.doi.org/10.1016/j.jhazmat.2020.122059DOI Listing
April 2020

Droplet Directional Movement on the Homogeneously Structured Superhydrophobic Surface with the Gradient Non-Wettability.

Langmuir 2020 Feb 23;36(4):880-888. Epub 2020 Jan 23.

College of Materials Science and Technology , Nanjing University of Aeronautics and Astronautics , 29# Yudao Street , Nanjing 210016 , P. R. China.

The surface with the gradient non-wettability intensely appeals to researchers because of its academic significance and applications for directional droplet movement. Herein, we developed a homogeneous structure superhydrophobic surface with the gradient non-wettability by a combination strategy of chemical etching and vapor diffusion modification. As a consequence, the as-prepared surface exhibits a remarkable gradient characteristic of water repellency, and the water contact angle is mainly located within the range of 162 ± 0.5 to 149 ± 0.4°. Meanwhile, the sliding angle also exhibits a corresponding change from 3 to 11°. On this basis, the gradient characteristic of non-wettability induces the distinguishing droplet adhesion on the surface, that is, from 19 μN for the most hydrophobic end to 57 μN for the opposite one. Because of the difference of the water adhesion force, droplets on the as-prepared surface can well roll alongside a specific direction (i.e., gradient direction of non-wettability). In terms of dynamic impact droplets, they can rapidly rebound off the sample surface with the short contact time of 12.8 ms, and the finally fallen droplets mainly deviate toward weaker regions because of water repellency. To analyze this phenomenon, it is found that the asymmetric mechanic behavior is mainly caused by the unbalanced retraction force between the both ends of the impact droplet. This work provides a novel strategy to construct the homogeneous structure superhydrophobic surface with the gradient non-wettability for the applications in the droplet movement control or transport.
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http://dx.doi.org/10.1021/acs.langmuir.9b03411DOI Listing
February 2020

Roles of adding biochar and montmorillonite alone on reducing the bioavailability of heavy metals during chicken manure composting.

Bioresour Technol 2019 Dec 25;294:122199. Epub 2019 Sep 25.

College of Life Science, Northeast Agricultural University, Harbin 150030, China. Electronic address:

The aim of this study was to explore the effects of adding biochar and montmorillonite alone on the correlations between bacteria and bioavailability of heavy metals (HM) during chicken manure composting. Three composting experiments were conducted, containing the without ameliorant, 10% biochar and 10% montmorillonite. The results showed that biochar and montmorillonite ameliorants significantly reduced the bioavailability of Cu by 90.3%, 81.2%, while that of Zn by 11.7%, 15.6%, respectively. Meanwhile, they also significantly changed bacterial community structure and enhanced the correlation between bacterial bands (i.e., 19, 24, 26 and 30) and HM fractions. This correlation was validated in network analysis. Structural equation models further confirmed that bacteria had a complete and effective pathway to influence the bioavailability of HM. In summary, this study suggested that biochar and montmorillonite additions were an effective regulation method to reduce the bioavailability of HM from composting system.
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http://dx.doi.org/10.1016/j.biortech.2019.122199DOI Listing
December 2019

Role of NH recycling on nitrogen fractions during sludge composting.

Bioresour Technol 2020 Jan 21;295:122175. Epub 2019 Sep 21.

College of Life Science, Northeast Agricultural University, Harbin 150030, China. Electronic address:

The aim of this study is to reduce nitrogen (N) loss and investigate the role of ammonia (NH) recycling on N fractions, environmental factors and bacterial communities. In this study, collected NH from composting and recycled in it. The results showed that NH recycling affected N-cycling processes such as nitrification. Redundancy Analyses (RDA) showed that NH-N had significantly negative correlation with denitrifying bacteria in treatment group (p < 0.05), demonstrating that NH recycling have influenced on the bacterial community structure. Furthermore, Structural Equation Model (SEM) revealed causal relationships between visual variables. Based on these results, we concluded that NH recycling is a novel method to reduce N loss.
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http://dx.doi.org/10.1016/j.biortech.2019.122175DOI Listing
January 2020

Electro-osmotic Treatment of Dredged Sediment by Different Power Supply Modes: Energy Consumption and Electro-osmotic Transport Volume.

Sci Rep 2019 09 3;9(1):12698. Epub 2019 Sep 3.

Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China.

Laboratory model tests were conducted in constant-voltage mode and constant-current mode for the one-dimensional electro-osmotic treatment of dredged sediment, with an approximately consistent initial electric power. The voltage, current, drainage rate, electro-osmotic transport volume, and energy consumption coefficient during the electro-osmotic process were measured and calculated. After treatment, the final soil moisture at designated positions in the test samples was measured to investigate the effects of different power supply modes. Further, the divergent phenomena observed with constant voltage and constant current were discussed. Based on an analysis of the measured energy consumption coefficients with time, we obtained a linear relationship between the applied/equivalent voltage and energy consumption coefficient. Furthermore, the electro-osmotic processes are divided into four stages by equal drainage quantity to obtain the energy consumption and electro-osmotic transport volume under different working conditions. The results reveal that the energy consumption of electro-osmosis is mainly determined by the applied voltage or the equivalent voltage for dredged sediment, while the value of electro-osmotic transport volume depends mainly on the change in soil water content rather than power supply modes. The drainage rate in constant-current mode was observed to be relatively steady, maintaining an approximately constant rate until the soil moisture was dramatically reduced. In other words, constant-current mode shows the advantages of being powerful and persistent in electro-osmotic treatment.
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http://dx.doi.org/10.1038/s41598-019-49050-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6722056PMC
September 2019

Statistically understanding the roles of nanostructure features in interfacial ice nucleation for enhancing icing delay performance.

Phys Chem Chem Phys 2019 Sep;21(36):19785-19794

College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China.

Freezing is a spontaneous phase transformation process, which is mainly governed by heterogeneous ice nucleation. This work aims at the discussion of the roles of nanostructure geometrical features in interfacial ice nucleation. Two kinds of superhydrophobic nanostructures with sealed layered porous and open cone features were designed and fabricated by means of wet-chemical processing methods. Both the resultant surfaces exhibited a larger extent of improvement of non-wettability, especially in the aspect of droplet movement. Comparing with the sealed layered nanoporous structures, the open nanocone structures only induced a sliding angle of 1°. During the freezing process, the solid-liquid contact type highly determined the macroscopic freezing process, and resulted in a difference of icing delay time of ∼170 s (and freezing temperature of ∼3.7 °C) between both superhydrophobic nanostructures. Also, the precooling time, the period before the moment of a droplet instantaneously becoming turbid, occupied a dominant role (∼90%) in the entire freezing time. The ice nucleation behavior was analyzed in detail according to the statistical results of 500 cycles of freezing temperatures, demonstrating that the ice nucleation probability of nanocone structures is less than that of layered nanoporous structures. This is in line with the ice nucleation temperatures of both as-prepared superhydrophobic nanostructures. As a consequence, there was a greater distinction in the ice nucleation rate, especially in the solid-liquid interface nucleation rate, by two orders of magnitude.
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http://dx.doi.org/10.1039/c9cp04103fDOI Listing
September 2019

Alteration of the fecal microbiota in North-Eastern Han Chinese population with sporadic Parkinson's disease.

Neurosci Lett 2019 08 11;707:134297. Epub 2019 Jun 11.

Department of Neurology, Weihai Municipal Hospital, Affiliated Hospital of Binzhou Medical College, Weihai, Shandong Province, PR China. Electronic address:

Studies have confirmed that the gut microbiota may be involved in the pathogenesis of Parkinson's disease(PD). However, the alterations in fecal microbiome in North-eastern Han sporadic PD patients remains unknown. This case control study was conducted to explore fecal microbiota compositions in North-eastern Han sporadic PD patients. The gut microbiota composition of 10 patients with sporadic PD and over 65 age and 10 matched controls was analyzed in this study. Microbiota communities in the feces were investigated using high-throughput Illumina Miseq sequencing targeting the V3-V4 region of 16S ribosomal RNA (rRNA) gene. The structure and richness of the fecal microbiota differed between PD patients and healthy controls. We had observed that the overall composition of gut microbiota in North-eastern Han Chinese healthy and PD patients was slightly different. The abundance of the family of Bacteroides and Prevotellaceae were significantly increased in heathy controls while the abundance of Ruminococcaceae, Verrucomicrobiaceae, Porphyromondaceae, Hydrogenoanaerobacterium and Lachnospiraceae NK4A were significantly enriched in North-eastern Han Chinese patients with PD. Sporadic PD patients North-eastern Han China is accompanied by alterations in the abundance of specific gut microbes. Our findings will provide a foundation to improve our understanding the pathogenesis of PD.
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http://dx.doi.org/10.1016/j.neulet.2019.134297DOI Listing
August 2019

Assessment of Multiorigin Humin Components Evolution and Influencing Factors During Composting.

J Agric Food Chem 2019 Apr 2;67(15):4184-4192. Epub 2019 Apr 2.

Yi'an County Agricultural Technology Promotion Center , Yi'an , Heilongjiang 161500 , China.

Humin (HM) is a complex mixture of molecules produced in the different biological processes, and the structural evolution of HM in the agricultural wastes composting are not well-known. Elucidating and comparing the structural evolution during livestock manure (LMC) and straw wastes (SWC) composting can help one to better understand the fates, features, and environmental impacts of HM. This study exploits excitation emission matrix-parallel factor (EEM-PARAFAC), two-dimensional correlation spectroscopy (2D-CoS), hetero-2DCoS, and structural equation model (SEM) to compare the fate of the HM. We fit a three-component EEM-PARAFAC model to characterize HM extracted from LMC and SWC. The results show that the HM evolution has a significant difference between LMC and SWC. As a result, the opposite change tendency and different change order of HM fluorescent components determine the different synthesis formation and evolution mechanisms. The diverse organic matter composition and dominant microbes might be the reason for the different evolution mechanism. Based on these results, a comprehensive view of the component changes of HM in the composting process is obtained. Furthermore, the superior potential of such an integrated approach during investigating the complex evolution in the environment was also demonstrated.
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http://dx.doi.org/10.1021/acs.jafc.8b07007DOI Listing
April 2019

Diversity in the Mechanisms of Humin Formation during Composting with Different Materials.

Environ Sci Technol 2019 04 25;53(7):3653-3662. Epub 2019 Mar 25.

College of Life Science , Northeast Agricultural University , Harbin 150030 , China.

Humins (HMs) play a very important role in various environmental processes and are crucial for regulating global carbon and nitrogen cycles in various ecosystems. Composting is a controlled decomposition process accompanied by the stabilization of organic solid waste materials. During composting, active fractions of organic substances can be transformed into HMs containing stable and complex macromolecules. However, the structural heterogeneity and formation mechanisms of HMs during composting with various substrates have not been clarified. Here, the structure and composition of HMs extracted from livestock manure (LM) and straw (SW) during composting were investigated by excitation-emission matrices spectroscopy and Fourier transform infrared spectroscopy. The results showed that the stability and humification of LM-HM were lower than that of SW-HM. The parallel factor analysis components of the HM in LM composting contained the same fluorescent unit, and the intermediate of cellulose degradation affected the structure of the HM from SW composting. Structural equation modeling demonstrated that low-molecular-weight compounds were key factors in humification. On the basis of the structure and key factors impacting HM, we constructed two mechanisms for the formation of HM from different composting processes. The LM-HMs from different humification processes have multiple identical fluorescent structural units, and the high humification of SW is affected by its polysaccharide constituents, which contains a fluorescent component in their skeleton, providing a basis for studying HM in composting.
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http://dx.doi.org/10.1021/acs.est.8b06401DOI Listing
April 2019

Effect of semi-continuous replacements of compost materials after inoculation on the performance of heat preservation of low temperature composting.

Bioresour Technol 2019 May 23;279:50-56. Epub 2019 Jan 23.

College of Life Science, Northeast Agricultural University, Harbin 150030, China.

Development of cold-adapted microbial agent is an efficient approach for composting in low temperature. The study was conducted to evaluate the effect of semi-continuous replacements of compost materials after inoculation (SRMI) on the heat preservation of low temperature composting derived from chicken manure. Results revealed that SRMI could significantly improve the heat preservation of the pile, although the time of start-up in two inoculation groups was approximately the same. Due to the increase in the number of replacements of materials led to the changes in microbial community structures and enzyme activity. Non-metric multidimensional and colorimetric methods indicated that microbial community structures and enzyme activity was completely different in SRMI. Structural equation model was constructed by key factors involved in diversity of the microbial community, enzyme activity, temperature and bio-heat generation. In summary, SRMI decidedly increase the heat preservation time of the pile and start-up efficiency of the low temperature composting.
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http://dx.doi.org/10.1016/j.biortech.2019.01.090DOI Listing
May 2019

Improved lignocellulose-degrading performance during straw composting from diverse sources with actinomycetes inoculation by regulating the key enzyme activities.

Bioresour Technol 2019 Jan 17;271:66-74. Epub 2018 Sep 17.

College of Life Science, Northeast Agricultural University, Harbin 150030, China. Electronic address:

This study was conducted to assess the effect of thermophilic actinomycetes inoculation on the lignocellulose degradation, enzyme activities and microbial community during different types of straw composting from wheat, rice, corn and soybean. The results showed that actinomycetes inoculation not only changed the structure of actinomycetic and bacterial community but also accelerated the degradation of cellulose, hemicellulose and lignin and increased the key enzymes activities including CMCase, Xylanase, manganese peroxidase, lignin peroxidase and laccase during composting particularly from wheat straw and rice straw. The key enzyme and physiochemical parameters which affected organic fractions degradation have been identified by redundancy analysis. The combined application of actinomycete inoculation and urea addition as a source of nitrogen was suggested to regulate the key enzyme activities and lignocellulose degradation, which lays a foundation for effectively managing organic wastes from different types of crop straws by composting.
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http://dx.doi.org/10.1016/j.biortech.2018.09.081DOI Listing
January 2019

Stabilization/solidification characteristics of organic clay contaminated by lead when using cement.

J Hazard Mater 2019 01 5;362:132-139. Epub 2018 Sep 5.

Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, 310058, China; Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China. Electronic address:

Research about cement treated soil has examined various characteristics of strengthened and stabilized soil, but has mainly focused on either the unconfined compressive strength or potentially toxic element (PTE) stabilizing results respectively in response to cement dosing. This study investigates how factors including cement concentration, lead concentration, humic/fulvic acid content and curing age affect these two geotechnical and environmental characteristics. A laboratory study was conducted to measure unconfined compressive strength, and lead leaching under several test conditions. Knowing that humic acid and fulvic acid can weaken cementation in cement treated soil but can stabilize PTEs such as lead by different chemical reactions, it was found that the acids generally reduce lead stabilization in cement treated soil. In addition, the stabilized strength reaches a peak at a specific lead content in soil. Finally, scanning electron microscopy was used to observe more detailed changes and mechanisms.
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http://dx.doi.org/10.1016/j.jhazmat.2018.09.010DOI Listing
January 2019

Effects of floodgates operation on nitrogen transformation in a lake based on structural equation modeling analysis.

Sci Total Environ 2018 Aug 28;631-632:1311-1320. Epub 2018 Mar 28.

College of Life Science, Northeast Agricultural University, Harbin 150030, China.

Floodgates operation is one of the primary means of flood control in lake development. However, knowledge on the linkages between floodgates operation and nitrogen transformation during the flood season is limited. In this study, water samples from six sampling sites along Lake Xingkai watershed were collected before and after floodgates operation. The causal relationships between environmental factors, bacterioplankton community composition and nitrogen fractions were determined during flood season. We found that concentrations of nitrogen fractions decreased significantly when the floodgates were opened, while the concentrations of total nitrogen (TN) and NO increased when the floodgates had been shut for a period. Further, we proposed a possible mechanism that the influence of floodgates operation on nitrogen transformation was largely mediated through changes in dissolved organic matter, dissolved oxygen and bacterioplankton community composition as revealed by structural equation modeling (SEM). We conclude that floodgates operation has a high risk for future eutrophication of downstream watershed, although it can reduce nitrogen content temporarily. Therefore, the environmental impacts of floodgates operation should be carefully evaluated before the floodwaters were discharged into downstream watershed.
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http://dx.doi.org/10.1016/j.scitotenv.2018.03.134DOI Listing
August 2018

Overexpression of microRNA408 enhances photosynthesis, growth, and seed yield in diverse plants.

J Integr Plant Biol 2018 Apr 14;60(4):323-340. Epub 2018 Mar 14.

State Key Laboratory of Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences, School of Life Sciences and School of Advanced Agricultural Sciences, Peking University, Beijing 100871, China.

The ability of a plant to produce grain, fruit, or forage depends ultimately on photosynthesis. There have been few attempts, however, to study microRNAs, which are a class of endogenous small RNAs post-transcriptionally programming gene expression, in relation to photosynthetic traits. We focused on miR408, one of the most conserved plant miRNAs, and overexpressed it in parallel in Arabidopsis, tobacco, and rice. The transgenic plants all exhibited increased copper content in the chloroplast, elevated abundance of plastocyanin, and an induction of photosynthetic genes. By means of gas exchange and optical spectroscopy analyses, we showed that higher expression of miR408 leads to enhanced photosynthesis through improving efficiency of irradiation utilization and the capacity for carbon dioxide fixation. Consequently, miR408 hyper-accumulating plants exhibited higher rate of vegetative growth. An enlargement of seed size was also observed in all three species overproducing miR408. Moreover, we conducted a 2-year-two-location field trial and observed miR408 overexpression in rice significantly increased yield, which was primarily attributed to an elevation in grain weight. Taken together, these results demonstrate that miR408 is a positive regulator of photosynthesis and that its genetic engineering is a promising route for enhancing photosynthetic performance and yield in diverse plants.
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http://dx.doi.org/10.1111/jipb.12634DOI Listing
April 2018

Blackwater treatment using vertical greening: Efficiency and microbial community structure.

Bioresour Technol 2018 Feb 28;249:175-181. Epub 2017 Sep 28.

School of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China. Electronic address:

This study assesses the use of vertical greening for blackwater treatment. The effects of hydraulic retention time (HRT) and drip frequency on treatment performance were systematically studied. Additionally, microbial communities in the vertical greening system were characterized. The results show that the removal efficiencies of NH-N and total phosphate (TP) increased with an increase in HRT, and the drip frequency had a significant effect on TP. High-throughput sequencing revealed that the diversity of the microbial community did not change significantly along vertical and horizontal directions, but the dominant species shifted. Heterotrophic nitrifying and denitrifying bacteria decreased significantly while autotrophic nitrifying bacteria, especially ammonia oxidizing bacteria, proliferated in a vertical direction. Therefore, it is concluded that vertical greening systems can effectively treat blackwater and lower NH-N levels.
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http://dx.doi.org/10.1016/j.biortech.2017.09.176DOI Listing
February 2018

Assessing the use of composts from multiple sources based on the characteristics of carbon mineralization in soil.

Waste Manag 2017 Dec 12;70:30-36. Epub 2017 Oct 12.

College of Life Science, Northeast Agricultural University, Harbin 150030, China. Electronic address:

In order to improve soil quality, reduce wastes and mitigate climate change, it is necessary to understand the balance between soil organic carbon (SOC) accumulation and depletion under different organic waste compost amended soils. The effects of proportion (5%, 15%, 30%), compost type (sewage sludge (SS), tomato stem waste (TSW), municipal solid waste (MSW), kitchen waste (KW), cabbage waste (CW), peat (P), chicken manure (CM), dairy cattle manure (DCM)) and the black soil (CK). Their initial biochemical composition (carbon, nitrogen, C:N ratio) on carbon (C) mineralization in soil amended compost have been investigated. The CO-C production of different treatments were measured to indicate the levels of carbon (C) mineralization during 50d of laboratory incubation. And the one order E model (M1E) was used to quantify C mineralization kinetics. The results demonstrated that the respiration and C mineralization of soil were promoted by amending composts. The C mineralization ability increased when the percentage of compost added to the soil also increased and affected by compost type in the order CM>KW, CW>SS, DCM, TSW>MSW, P>CK at the same amended level. Based on the values of C and k from M1E model, a management method in agronomic application of compost products to the precise fertilization was proposed. The SS, DCM and TSW composts were more suitable in supplying fertilizer to the plant. Otherwise, The P and MSW composts can serve the purpose of long-term nutrient retention, whereas the CW and KW composts could be used as soil remediation agent.
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http://dx.doi.org/10.1016/j.wasman.2017.08.050DOI Listing
December 2017