Nitrogen cycling · source papers

Every paper in the cohort, open to check.

The 490 papers whose title or abstract names a nitrogen process and a bioelectrochemical system. Open a paper’s corpus page to see every value extracted from it next to the sentence it came from, read the PDF where we hold one, or go to the publisher. Counts are distinct facts — duplicate copies collapsed.

Measured 2026-10-05 15:10 UTC (staging)Query sha256 c76b9991ab52← Nitrogen use case
Reset

Showing 101–200 of 490 matching · 166 with a PDF here · 490 in the cohort

PaperSystemSub-processesFacts (modelable)Check it
IDENTIFICATION OF POTENTIAL-GENERATING IONS IN THE NUTRIENT SOLUTION OF BIOELECTROCHEMICAL SYSTEM
Russian Journal of Biological Physics and Chemisrty · 2024
——47 (3)Corpus · PDF ↗ · DOI ↗
Insight into a single-chamber air-cathode microbial fuel cell for nitrate removal and ecological roles
Frontiers in Bioengineering and Biotechnology · 2024
MFCCathodic denitrification10 (0)Corpus · PDF ↗ · DOI ↗
Integrated Constructed Wetland–Microbial Fuel Cell Systems Using Activated Carbon: Structure-Activity Relationship of Activated Carbon, Removal Performance of Organics and Nitrogen
Water · 2024
MFCCathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together4 (0)Corpus · PDF ↗ · DOI ↗
Keluli Tahan Karat SS304L Terubahsuai Permukaan untuk Sensor Elektrokimia Mikrob dalam Pemantauan Semasa Kualiti Air
Jurnal Kejuruteraan · 2024
——4 (0)Corpus · PDF ↗ · DOI ↗
Magnetite-mediated shifts in denitrifying consortia in bioelectrochemical system: Insights into species selection and metabolic dynamics
Water Research · 2024
—Cathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Microbial fuel cells in electricity generation with waste treatment: Alternative electron acceptors
Sigma Journal of Engineering and Natural Sciences – Sigma Mühendislik ve Fen Bilimleri Dergisi · 2024 · review (values may be cited)
MFCCathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together93 (61)Corpus · PDF ↗ · DOI ↗
Nitrate electro-bioremediation and water disinfection for rural areas
Chemosphere · 2024
—Cathodic denitrification, N₂O, Groundwater0 (0)Corpus · no PDF · DOI ↗
Research progress and prospect of low-carbon biological technology for nitrate removal in wastewater treatment
Frontiers of Environmental Science & Engineering · 2024
—Cathodic denitrification0 (0)Corpus · PDF ↗ · DOI ↗
Simultaneous ammonia and nitrate removal by novel integrated partial denitrification-anaerobic ammonium oxidation-bioelectrochemical system
Bioresource Technology · 2024
—Cathodic denitrification, Nitrification / NH₄⁺ oxidation0 (0)Corpus · no PDF · DOI ↗
Simultaneous nutrient-abundant hydroponic wastewater treatment, direct carbon capture, and bioenergy harvesting using microalgae–microbial fuel cells
Desalination and Water Treatment · 2024
MFCN recovery (NH₃, struvite)0 (0)Corpus · no PDF · DOI ↗
Simultaneous organic carbon, nitrogen removal, and electricity generation in a novel A4-MFC system for the treatment of leachate from a composting site: performance and modeling
Sustainable Energy & Fuels · 2024
MFC—2 (0)Corpus · no PDF · DOI ↗
Sludge dewaterability improvement in microbial fuel cell powered electro-Fenton system (MFCⓅEFs) coupled with chitosan quaternary ammonium salt
2024
MFC—0 (0)Corpus · no PDF · DOI ↗
Strategies for ammonia recovery from wastewater: a review
Environmental Chemistry Letters · 2024 · review (values may be cited)
REVIEWCathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together, N recovery (NH₃, struvite)0 (0)Corpus · PDF ↗ · DOI ↗
The Effect of Electricity Generation on the Performance of Microbial Fuel Cells for Anammox
Sustainability · 2024
MFCNitrification / NH₄⁺ oxidation1 (0)Corpus · PDF ↗ · DOI ↗
Unraveling the Electron Transfer in <i>Cupriavidus necator</i> – Insights Into Mediator Reduction Mechanics
ChemElectroChem · 2024
—Cathodic denitrification0 (0)Corpus · PDF ↗ · DOI ↗
[Enhanced nitrogen removal by bioelectrochemical coupling anammox and characteristics of microbial communities].
PubMed · 2023
MECCathodic denitrification, Nitrification / NH₄⁺ oxidation3 (0)Corpus · no PDF · DOI ↗
A state-of-the-art review and guidelines for enhancing nitrate removal in bio-electrochemical systems (BES)
Journal of Water Process Engineering · 2023
REVIEWCathodic denitrification, Nitrification / NH₄⁺ oxidation0 (0)Corpus · no PDF · DOI ↗
Algae-assisted bioelectrochemical system with ammonium, sulfide removal and parallel biomethanation
Bulgarian Chemical Communications · 2023
MEC—0 (0)Corpus · PDF ↗ · DOI ↗
An IoT-Enabled Microbial Fuel Cell for Wastewater Treatment and Enhancing Hydroponic Systems: An Eco-Friendly Renewable Energy Development
2023 IEEE 11th Region 10 Humanitarian Technology Conference (R10-HTC) · 2023
MFCCathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together3 (0)Corpus · no PDF · DOI ↗
Azo dye wastewater treatment in a novel process of biofilm coupled with electrolysis
Archives of Environmental Protection · 2023
—Cathodic denitrification20 (4)Corpus · PDF ↗ · DOI ↗
Bioelectrochemical ammonium recovery from wastewater: A review
Chemical Engineering Journal · 2023
REVIEWN recovery (NH₃, struvite)0 (0)Corpus · PDF ↗ · DOI ↗
Bioelectrochemical system for nitrogen removal: Fundamentals, current status, trends, and challenges
Chemosphere · 2023
—Cathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together0 (0)Corpus · no PDF · DOI ↗
Biohydrogen Production in Microbial Electrolysis Cell Operating on Designed Consortium of Denitrifying Bacteria
Food Technology and Biotechnology · 2023
MECCathodic denitrification29 (4)Corpus · PDF ↗ · DOI ↗
Biohydrogen production potential with sulfate and nitrate removal by heat-pretreated enriched sulfate-reducing microorganisms-based bioelectrochemical system
Archives of Microbiology · 2023
—Cathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Challenges and applications of nitrate-reducing microbial biocathodes
Bioelectrochemistry · 2023
——0 (0)Corpus · PDF ↗ · DOI ↗
Combined anaerobic - aerobic bioelectrochemical system for ammonium sulfide and carbon removal from ethanol stillage
Journal of Chemical Technology and Metallurgy · 2023 · informs H5
MEC—162 (4)Corpus · PDF ↗ · DOI ↗
Deciphering the roles of suspended sludge and fixed sludge at electrode in microbial fuel cell accomplishing sulfide-based autotrophic denitrification
Biochemical Engineering Journal · 2023
MFCCathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Decontamination and Ecological Restoration Performance of a Bioretention Cell-Microbial Fuel Cell under Multiple-Antibiotics Stress
Applied Sciences · 2023
MFCCathodic denitrification1 (0)Corpus · PDF ↗ · DOI ↗
Denitrification in Microbial Fuel Cells Using Granular Activated Carbon as an Effective Biocathode
Energies · 2023 · informs H1
MFCCathodic denitrification26 (0)Corpus · PDF ↗ · DOI ↗
Dual-chamber microbial fuel cell with denitrifying biocathode for the treatment of cassava processing wastewater
Engenharia Sanitaria e Ambiental · 2023 · informs H2, H5
MFCCathodic denitrification68 (18)Corpus · PDF ↗ · DOI ↗
Effects of Carbon Source on Denitrification and Electricity Generation in Composite Packing MFC-CW for Tail Water Treatment
Water · 2023
MFCCathodic denitrification0 (0)Corpus · PDF ↗ · DOI ↗
Electroactive bacteria–algae biofilm coupled with siphon aeration boosts high-salinity wastewater purification: A pilot study focusing on performance and microbial community
Journal of Water Process Engineering · 2023
MFCCathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together0 (0)Corpus · no PDF · DOI ↗
Enhanced denitrification efficiency with immobilized bacteria in microbial fuel cell
Desalination and Water Treatment · 2023
MFCCathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Enhancement of Ammonium Oxidation at Microoxic Bioanodes
Environmental Science &amp; Technology · 2023 · informs H4, H5
OTHERNitrification / NH₄⁺ oxidation58 (10)Corpus · PDF ↗ · DOI ↗
Enhancing simultaneous electrosynthesis of CO2 and nitrogen removal in microbial fuel cell (MFC) cathode compartment by adding Fe–C/biochar compound substrates
Journal of Power Sources · 2023
MFC—0 (0)Corpus · no PDF · DOI ↗
Environmental Technologies to Treat Sulfur Pollution: Principles and Engineering
IWA Publishing eBooks · 2023
—Cathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Evaluation of organic matter and nitrogen removals, electricity generation and bacterial community responses in sediment microbial fuel cell coupled with Vallisneria natans
Journal of environmental chemical engineering · 2023
MFC—0 (0)Corpus · no PDF · DOI ↗
Greenhouse Gas Control, Biofuel Recovery, and Nutrients Removal in Single-Chamber Microalgal Biocathode Microbial Fuel Cells
Journal of Environmental Engineering · 2023
MFCCathodic denitrification, N₂O0 (0)Corpus · no PDF · DOI ↗
Heterotrophic anodic denitrification coupled with cathodic metals recovery from on-site smelting wastewater with a bioelectrochemical system inoculated with mixed Castellaniella species
Water Research · 2023
—Cathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Influence of carbon-based cathodes on biofilm composition and electrochemical performance in soil microbial fuel cells
Environmental Science and Ecotechnology · 2023
MFCCathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Iron-sulfur mediated antibiotic resistance genes attenuation and autotrophic denitrification mechanisms in bioelectrochemical systems
Journal of Water Process Engineering · 2023
—Cathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Key genes of electron transfer, the nitrogen cycle and tetracycline removal in bioelectrochemical systems
Biotechnology for Biofuels and Bioproducts · 2023
MFCCathodic denitrification2 (0)Corpus · PDF ↗ · DOI ↗
Limited dissolved oxygen facilitated nitrogen removal at biocathode during the hydrogenotrophic denitrification process using bioelectrochemical system
Bioresource Technology · 2023
—Cathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Long-term effect of polyethylene microplastics on the bioelectrochemical nitrogen removal process
Chemical Engineering Journal · 2023
—Cathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Microbial and environmental factors affecting nitrate removal in bio-electrochemical systems (BES)
2023
—Cathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together7 (0)Corpus · no PDF · DOI ↗
Microbial electrolysis drives ammonium removal from saline wastewater through marine anammox bacteria
Chemical Engineering Journal · 2023
—Nitrification / NH₄⁺ oxidation0 (0)Corpus · no PDF · DOI ↗
Negative-pressure gas-diffusion electrode for effective ammonia recovery in bioelectrochemical systems
Journal of Cleaner Production · 2023
—N recovery (NH₃, struvite)0 (0)Corpus · no PDF · DOI ↗
Optimizing total ammonia–nitrogen concentration for enhanced microbial fuel cell performance in landfill leachate treatment: a bibliometric analysis and future directions
Environmental Science and Pollution Research · 2023 · review (values may be cited)
MFC—0 (0)Corpus · PDF ↗ · DOI ↗
Organics and Nutrient Transformation in a Microbial Fuel Cell Influenced by Antibiotics
CLEAN – Soil, Air, Water · 2023
MFC—5 (0)Corpus · no PDF · DOI ↗
Performance and microbial community analysis on nitrate removal in a bioelectrochemical reactor
PLOS ONE · 2023
MECCathodic denitrification14 (0)Corpus · PDF ↗ · DOI ↗
Power Generation by Halophilic Bacteria and Assessment of the Effect of Salinity on Performance of a Denitrifying Microbial Fuel Cell
Energies · 2023
MFCCathodic denitrification9 (0)Corpus · PDF ↗ · DOI ↗
Respiration in Electroactive Bacteria: Bioinorganic Aspects
Encyclopedia of Inorganic and Bioinorganic Chemistry · 2023
—Cathodic denitrification1 (0)Corpus · no PDF · DOI ↗
Simultaneous denitrification and electricity generation in a methane‐powered bioelectrochemical system
Water Environment Research · 2023
—Cathodic denitrification6 (0)Corpus · no PDF · DOI ↗
Sustained-release nitrate combined with microbial fuel cell: A novel strategy for PAHs and odor removal from sediment.
Journal of hazardous materials · 2023
MFCCathodic denitrification4 (0)Corpus · no PDF · DOI ↗
Synergism of nitrogen removal and greenhouse gases emission reduction in pyrite/biochar-based bioretention system coupled with microbial fuel cell: Performance and mechanism
Journal of Cleaner Production · 2023
MFC—0 (0)Corpus · no PDF · DOI ↗
The effect of ammonia concentration on the treatment of bio electrochemical leachate using MFCs technology
Environmental Science and Pollution Research · 2023
MFCCathodic denitrification, Nitrification / NH₄⁺ oxidation0 (0)Corpus · PDF ↗ · DOI ↗
A Comparative Model-Analysis on Sulphide Bio-oxidation with Different Electron Acceptors
Linköping Electronic Conference Proceedings · 2022
——57 (5)Corpus · PDF ↗ · DOI ↗
A revolving algae biofilm based photosynthetic microbial fuel cell for simultaneous energy recovery, pollutants removal, and algae production
Frontiers in Microbiology · 2022
MSC—7 (0)Corpus · PDF ↗ · DOI ↗
A tartrate-EDTA-Fe complex mediates electron transfer and enhances ammonia recovery in a bioelectrochemical-stripping system
Environmental Science and Ecotechnology · 2022
—N recovery (NH₃, struvite)0 (0)Corpus · PDF ↗ · DOI ↗
Advanced bioelectrochemical system for nitrogen removal in wastewater
Chemosphere · 2022 · review (values may be cited)
——1 (0)Corpus · no PDF · DOI ↗
Ammonia Removal by Simultaneous Nitrification and Denitrification in a Single Dual-Chamber Microbial Electrolysis Cell
Energies · 2022
MECCathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together64 (13)Corpus · PDF ↗ · DOI ↗
Ammonium recovery from agro-industrial digestate using bioelectrochemical systems
Water Science and Technology · 2022
MECN recovery (NH₃, struvite)4 (0)Corpus · no PDF · DOI ↗
Application of Vermifiltration for Domestic Sewage Treatment
Wastewater Treatment · 2022
——45 (0)Corpus · PDF ↗ · DOI ↗
Bioelectrochemical extraction of ammonium from low-strength wastewater with concomitant generation of high-purity hydrogen.
Environmental Technology · 2022
—N recovery (NH₃, struvite)7 (0)Corpus · no PDF · DOI ↗
Bioelectrochemical processes and cellulosic carbon source enhance the autotrophic and heterotrophic denitrification of low C/N ratio wastewater in tidal flow constructed wetland - Microbial fuel cells
Journal of Cleaner Production · 2022
MFCCathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Bioelectrochemical systems for enhanced nitrogen removal with minimal greenhouse gas emission from carbon-deficient wastewater: A review
The Science of The Total Environment · 2022
REVIEW—0 (0)Corpus · no PDF · DOI ↗
Bioenergy recovery associated with treatment of actual meat industry wastewater in blue green algal biocathode based microbial fuel cell: Experimental and modeling study
Energy Sources Part A Recovery Utilization and Environmental Effects · 2022
MSC—0 (0)Corpus · no PDF · DOI ↗
Complete genome sequence of Pseudomonas stutzeri S116 owning bifunctional catalysis provides insights into affecting performance of microbial fuel cells
BMC Microbiology · 2022
MFCCathodic denitrification4 (0)Corpus · PDF ↗ · DOI ↗
Concentration cell based on electrogenic processes in the root environment
Technical Physics Letters · 2022
——4 (0)Corpus · PDF ↗ · DOI ↗
Construction of an MFC Anaerobic-Aerobic Coupled Denitrification System and Its Performance Enhancement Method
Journal of New Materials for Electrochemical Systems · 2022
MFCCathodic denitrification23 (0)Corpus · PDF ↗ · DOI ↗
Coupling Microbial Fuel Cell and Hydroponic System for Electricity Generation, Organic Removal, and Nutrient Recovery via Plant Production from Wastewater
Energies · 2022
MFCN recovery (NH₃, struvite)5 (0)Corpus · PDF ↗ · DOI ↗
Coupling mixotrophic denitrification and electroactive anodic nitrification by nitrate addition for promoting current generation and nitrogen removal
The Science of The Total Environment · 2022 · hidden from the corpus listing
—Cathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together0 (0)Corpus · no PDF · DOI ↗
Denitrification in perspective of carbon neutralization: CO2 emission reduction and electricity generation by Fe-anode and bio-cathode MFC
Journal of Water Process Engineering · 2022
MFCCathodic denitrification0 (0)Corpus · no PDF · DOI ↗
Effect of Electrode Distances on Remediation of Eutrophic Water and Sediment by Sediment Microbial Fuel Cell Coupled Floating Beds
International Journal of Environmental Research and Public Health · 2022
MFCCathodic denitrification2 (0)Corpus · PDF ↗ · DOI ↗
Effect of nitrate on power generation and nitrogen removal and bacterial community in Microbial fuel cell (MFC)
Research Square · 2022 · informs H2
MFCCathodic denitrification85 (50)Corpus · PDF ↗ · DOI ↗
Effect of poised cathodic potential on anodic ammonium nitrogen removal from domestic wastewater by air-cathode microbial fuel cells.
SSRN Electronic Journal · 2022
MFCNitrification / NH₄⁺ oxidation7 (0)Corpus · no PDF · DOI ↗
Effect of wetland plant fermentation broth on nitrogen removal and bioenergy generation in constructed wetland-microbial fuel cells
Frontiers of Environmental Science & Engineering · 2022
MFC—0 (0)Corpus · no PDF · DOI ↗
Effects of draw solutes on an integrated forward osmosis—Microbial fuel cell system treating a synthetic wastewater
Water Environment Research · 2022
MFC—4 (0)Corpus · no PDF · DOI ↗
Electrifying secondary settlers to enhance nitrogen and pathogens removals
Chemical Engineering Journal · 2022
—Cathodic denitrification, N₂O0 (0)Corpus · no PDF · DOI ↗
Electro-bioremediation of nitrate contaminated saline groundwater
Global NEST International Conference on Environmental Science &amp; Technology · 2022
—Cathodic denitrification, Groundwater8 (0)Corpus · no PDF · DOI ↗
Electro-cultivation of hydrogen-oxidizing bacteria to accumulate ammonium and carbon dioxide into protein-rich biomass
Bioresource Technology Reports · 2022
——0 (0)Corpus · no PDF · DOI ↗
Energy Consumption for Nutrient Removal from High-Nitrate and High-Phosphorus Wastewater in Aerobic and Anaerobic Bioelectrochemical Reactors
Energies · 2022 · informs H2
MNRC—83 (11)Corpus · PDF ↗ · DOI ↗
Enhanced nitrogen removal of constructed wetlands by coupling with the bioelectrochemical system under low temperature: Performance and mechanism
Journal of Cleaner Production · 2022
——0 (0)Corpus · no PDF · DOI ↗
Enhanced Swine Wastewater Treatment by Constructed Wetland—Microbial Fuel Cell Systems
Water · 2022
MFCNitrification / NH₄⁺ oxidation4 (0)Corpus · PDF ↗ · DOI ↗
GREEN APPROACH FOR THE TREATMENT OF TEXTILE WASTEWATER USING MICROBIAL FUEL CELL AND BIOELECTRICITY PRODUCTION
Pollution Research · 2022
MFC—22 (17)Corpus · PDF ↗ · DOI ↗
Higher performances of open vs. closed circuit microbial fuel cell sensor for nitrate monitoring in water
Journal of environmental chemical engineering · 2022
MFC—0 (0)Corpus · no PDF · DOI ↗
Impact of anodophilic biofilm bioelectroactivity on the denitrification behavior of air‐cathode microbial fuel cells
Biotechnology and Bioengineering · 2022
MFCCathodic denitrification1 (0)Corpus · no PDF · DOI ↗
Increased biological and cathodic hydrogen production using a novel integrated thermophilic fermenter and dual anion exchange membrane bioelectrochemical system
MethodsX · 2022
——0 (0)Corpus · PDF ↗ · DOI ↗
Influence of Membrane Type on Some Electrical Properties of a Single Microbial Fuel Cell
Engineering, Technology &amp; Applied Science Research · 2022
MFC—6 (0)Corpus · PDF ↗ · DOI ↗
Influence of microbial fuel cell integration on organic matter and nutrient removal in a constructed wetland for wastewater treatment
Global NEST International Conference on Environmental Science &amp; Technology · 2022
MFCNitrification / NH₄⁺ oxidation48 (11)Corpus · PDF ↗ · DOI ↗
Insight into the role of microbial community interactions on nitrogen removal facilitated by a bioelectrochemical system in an osmotic membrane bioreactor
Bioresource Technology · 2022
——0 (0)Corpus · no PDF · DOI ↗
Kinetics of Pulp and Paper Wastewater Treatment by High Sludge Retention Time Activated Sludge Process
Journal of Hunan University Natural Sciences · 2022
——3 (0)Corpus · no PDF · DOI ↗
Membrane penetration of nitrogen and its effects on nitrogen removal in dual-chambered microbial fuel cells
Chemosphere · 2022
MFC—0 (0)Corpus · no PDF · DOI ↗
Microalgae- and biochar-mediated wastewater treatment: augmentation of bioelectrochemical nitrogen removal and biogas production
Research Square · 2022 · informs H4
MNRC—70 (16)Corpus · PDF ↗ · DOI ↗
Microbial Electrochemical Technologies for Sustainable Nitrogen Removal in Marine and Coastal Environments
International Journal of Environmental Research and Public Health · 2022
——1 (0)Corpus · PDF ↗ · DOI ↗
Microbiome Composition and Dynamics of a Reductive/Oxidative Bioelectrochemical System for Perchloroethylene Removal: Effect of the Feeding Composition
Frontiers in Microbiology · 2022
—Cathodic denitrification, Groundwater0 (0)Corpus · PDF ↗ · DOI ↗
Microbiome Composition and Dynamics of a ReductiveOxidative Bioelectrochemical S
Journal of Water Process Engineering · 2022
—Cathodic denitrification, Groundwater18 (0)Corpus · no PDF
Nutrient removal and recovery from wastewater by microbial fuel cell-based systems – A review
2022 · review (values may be cited)
MFCCathodic denitrification, Nitrification / NH₄⁺ oxidation, Nitrification + denitrification named together, N recovery (NH₃, struvite)0 (0)Corpus · no PDF · DOI ↗
Optimization of Ammonia Nitrogen and Phosphorus Removal Performance and Analysis of Microbial Community Structure in Microbial Fuel Cells
Water · 2022
MFC—1 (0)Corpus · PDF ↗ · DOI ↗
Outstanding energy reduction of nitrogen recovery by biohythane concept introduction by 3D-weaved anode network in microbial electrolysis cell
Resources Conservation and Recycling · 2022
MECN recovery (NH₃, struvite)0 (0)Corpus · no PDF · DOI ↗

Sub-processes and “informs” are matched from title, abstract and extracted parameter names (scripts/collab/nitrogen-readiness.sql); they are a screening aid, not a classification. Reviews are kept in the cohort and flagged, because their values may be cited from other papers. A missing PDF usually means the paper is paywalled — open its DOI.