🔬 Scientific Research Library: CEA Biophysics & Metabolic Kinetics
This chronological research repository contains 31 peer-referenced plant physiology, bioenergetics, fluid dynamics, and climate steering papers authored and curated by Inwoo Hwang — Inwoovation Lab. Each monograph couples intracellular enzymatic kinetics (KEGG reaction pathways and Enzyme Commission identifiers) with macroscopic greenhouse psychrometrics, CFD boundary-layer physics, and stoichiometric hydroponic fertigation control.
Canopy CO2 Enrichment Dynamics (1200 ppm) and Rubisco Carboxylation Kinetics under Variable PPFD Regimes
Ambient CO_2 (415 ppm) limits Rubisco carboxylation efficiency in high-density CEA greenhouses. We modeled Rubisco oxygenase vs carboxylase activity across CO_2 enrichment levels from 400 to 1500 ppm under PPFD levels up to 400 μmol/m²/s. Enriching canopy air to 1200 ppm suppressed photorespiration by 68%, boosting net...
Read Full Research Paper →Pulsed Pre-Harvest UV-B (310nm) Irradiation for 3-Fold Expansion of Sulforaphane Content in Broccoli Microgreens
Sulforaphane, derived from glucoraphanin hydrolysis, is a potent anti-cancer isothiocyanate. We applied targeted UV-B pulses (310nm LED, 5 kJ/m^2) 24 hours before harvesting broccoli microgreens (Brassica oleracea var. italica). Transcriptional up-regulation of CYP79F1 and MYB28 transcription factors yielded a 310% inc...
Read Full Research Paper →Acoustic Wave Resonance (1-5 kHz) Inducing Stomatal Pore Expansion for Enhanced Micro-Foliar Uptake
Plant cell walls and plasma membranes respond to mechanical acoustic vibrations. We applied acoustic frequency sweeps (1 kHz to 5 kHz at 80 dB) to canopy leaves prior to foliar calcium spraying (CaCl_2 5 mM). Resonance frequency at 3.2 kHz stimulated guard cell K^+ influx, expanding stomatal aperture width by 64% and b...
Read Full Research Paper →400-1000nm Hyperspectral Leaf Reflectance Modeling for Early Discrimination of Fe vs N Chlorosis
Iron (Fe) and Nitrogen (N) deficiencies both manifest as interveinal chlorosis, rendering visual diagnosis ambiguous. We acquired 400–1000nm hyperspectral reflectance curves from mesophyll tissue under controlled nutrient depletion. A Support Vector Machine (SVM) classifier trained on the Photochemical Reflectance Inde...
Read Full Research Paper →Droplet Size Distribution (30-80 μm) Optimization in Aeroponic Misters for Maximum Dissolved Oxygen Absorption
Aeroponic root misting provides superior oxygenation compared to liquid hydroponics. We evaluated high-pressure ultrasonic misting nozzles producing droplet distributions from 10 to 150 μm. Droplet diameter of 50 μm optimized root surface liquid film thickness (5–10 μm), preventing root hair drowning while maintaining ...
Read Full Research Paper →Far-Red (730nm) Photon Fraction Steering for Rapid Leaf Area Index Expansion without Stem Lodging
Far-red light (730nm) converts active phytochrome B (P_{fr) into inactive P_r, triggering shade avoidance responses. We applied dynamic end-of-day (EOD) Far-Red pulses (15 μmol/m²/s for 20 minutes) during early vegetative stages of leafy greens. The EOD-FR treatment expanded total Leaf Area Index (LAI) by 35% within 10...
Read Full Research Paper →Lead-Free Perovskite Quantum Dot Wavelength-Shifting Films for Solar Photonic Yield Optimization
Green photons (500–560nm) exhibit lower quantum yield of O2 evolution compared to red photons (660nm). We engineered flexible greenhouse films embedded with lead-free Cs3Bi2Br9 perovskite quantum dots that absorb green photons and re-emit at 660nm with 88% photoluminescence quantum yield (PLQY). Greenhouse trials demon...
Read Full Research Paper →Real-Time Closed-Loop Machine Learning Ionic Activity Balancing in Recirculating Hydroponic Systems
Ion depletion imbalance in closed-loop NFT hydroponics causes nutrient toxicities and ionic antagonism. We deployed an array of solid-state Ion-Selective Electrodes (ISE for K^+, Ca^{2+, NO_3^-, NH_4^+) interfaced with a Long Short-Term Memory (LSTM) neural network. The AI system predicted plant ion uptake rates with 9...
Read Full Research Paper →Navier-Stokes Fluid Dynamics Modeling of Leaf Boundary Layer Thermal Transport under Micro-Vectored Airflow
Stagnant boundary layers (r_b > 250 s/m) restrict CO_2 diffusion and transpirational cooling in dense vertical farm canopies. We solved 3D Navier-Stokes equations coupled with heat and mass transfer models under micro-vectored vertical air velocities ranging from 0.05 to 0.6 m/s. Maintaining canopy velocity at 0.35 m/s...
Read Full Research Paper →Glucosinolate Accumulation Kinetics and Cold-Stress Induced Anthocyanin Biosynthesis in Brassica oleracea
Glucosinolates and anthocyanins contribute to the antioxidant capacity and bitter flavor profile of curly kale. We investigated temperature DIF (+8°C day/night differential) and sulfur fertigation (SO_4^{2- 65 ppm) on myrosinase enzyme activity and glucoraphanin accumulation. Cold night temperature (12°C) combined with...
Read Full Research Paper →Oxalate Biosynthesis and Ascorbate Recycling Kinetics under Dynamic LED Spectrum in Spinacia oleracea
Spinach (Spinacia oleracea) accumulates anti-nutritional oxalic acid in mesophyll tissue. We quantified the metabolic flux between L-ascorbate breakdown and oxalic acid accumulation under blue (450nm) vs red (660nm) LED regimes. High blue photon flux increased L-galactono-1,4-lactone dehydrogenase activity while down-r...
Read Full Research Paper →Plastidic Nitrate Reductase (NR) Activation vs Petiole Nitrate Storage under Spectral Light Steering
Accumulation of NO3- in petiole vacuoles poses health risks in hydroponic leafy greens. We investigated light-driven activation of plastidic Nitrate Reductase (NR, EC 1.7.1.1) in hydroponic spinach under pre-harvest end-of-day (EOD) lighting treatments. Adding 30 μmol/m²/s supplemental blue light 4 hours prior to harve...
Read Full Research Paper →Pulse-Amplitude-Modulation (PAM) Fluorometry and Fv/Fm Quantum Yield Kinetics under Rapid Spectrum Transitions
Photosystem II (PSII) maximum quantum efficiency (Fv/Fm) reflects non-photochemical quenching (NPQ) and photoinhibition. We measured real-time PAM fluorescence kinetics in spinach leaves subjected to step-change transitions between broad-spectrum white and dynamic blue/red LED ratios. Transient NPQ relaxation kinetics ...
Read Full Research Paper →Root Zone Temperature (RZT) Dynamics, Dissolved Oxygen (DO) Saturation, and ATP Yield in NFT Spinach Channels
High root zone temperature (RZT > 22°C) reduces dissolved oxygen (DO) solubility in Nutrient Film Technique (NFT) channels, causing root hypoxia and Pythium vulnerability in spinach. We modeled root respiration rates and ATP yield across RZT regimes from 14°C to 24°C. Chilling nutrient solution to 18°C maintained DO sa...
Read Full Research Paper →KEGG Carotenoid Biosynthetic Pathway Flux and Lutein Xanthophyll Photoprotection under High PPFD Regimes
Lutein is a major functional carotenoid protecting light-harvesting complex II (LHCII) from singlet oxygen damage. We analyzed metabolic flux through the KEGG sly00906 pathway in spinach leaves under high PPFD (350 μmol/m²/s) combined with supplemental UV-A (385nm). Transcriptional up-regulation of lycopene epsilon-cyc...
Read Full Research Paper →Photomorphogenic Regulation of Anthocyanin Biosynthetic Genes via Blue-to-Red Spectral Ratios
Anthocyanins serve as photoprotective antioxidant pigments in plant vacuoles. This doctoral paper demonstrates that modulating the Blue (450nm) to Red (660nm) photon flux ratio (B:R) from 0.15 to 0.45 under a constant DLI (16 mol/m²/day) triggers a 3.8-fold up-regulation of Chalcone Synthase (CHS, EC 2.3.1.74) and Dihy...
Read Full Research Paper →Circadian Clock Gating of Plastidic Nitrate Reductase (NR) Activity under Photoperiod Extension
Nitrate Reductase (NR, EC 1.7.1.1) catalyzes the rate-limiting step of nitrate reduction in plant cytosol. NR enzyme activity undergoes strict circadian regulation, peaking 2 hours after subjective dawn driven by CCA1/LHY transcription factors. This paper establishes that extending photoperiod beyond 18 hours disrupts ...
Read Full Research Paper →Rhizosphere Proton (H+) Exudation and Cation Exchange Capacity (CEC) Kinetics under NO3-/NH4+ Dosing
Uptake of ammonium (NH4⁺) via root AMT transporters triggers net proton (H⁺) exudation via plasma membrane H⁺-ATPase, acidifying the rhizosphere pH by up to 1.4 units. Conversely, nitrate (NO3⁻) symport utilizes H⁺ co-consumption, elevating rhizosphere pH. This doctoral research formulates a dynamic N-ratio feedback co...
Read Full Research Paper →Aquaporin Expression Dynamics and Root Hydraulic Conductivity (Lpr) under Micro-Climate VPD Impulse
Root hydraulic conductivity (Lpr) is regulated at the cell membrane by aquaporin channel proteins (PIP1 and PIP2 subfamilies). When air VPD rapidly increases from 0.8 kPa to 2.2 kPa, ABA signaling induces dephosphorylation and gating (closure) of PIP2;1 channels within 20 minutes, reducing Lpr by 54% and triggering lea...
Read Full Research Paper →Metabolic Flux Analysis of Flavonoid Biosynthesis (KEGG sly00941) under Osmotic and Thermal Stress
Flavonoids (quercetin, kaempferol, and rutin) represent powerful polyphenolic antioxidants in horticultural crops. Utilizing kinetic rate equations from the KEGG Flavonoid Biosynthesis Pathway (sly00941), this doctoral paper quantifies carbon partition coefficients between primary carbohydrate growth and secondary phen...
Read Full Research Paper →Thermodynamic Optimization of Daily Light Integral (DLI) and Phytochrome Photostationary State (PSS)
This doctoral paper establishes a quantitative bioenergetic framework predicting the Phytochrome Photostationary State (PSS, Pfr/Ptotal) as a function of spectral photon flux density (SPFD) between 400nm and 750nm. By integrating NASA POWER solar spectral models with cryptochrome-mediated guard cell turgor dynamics, we...
Read Full Research Paper →Xylem-Mediated Calcium Translocation Kinetics and Root-Pressure Driven Guttation Steering
Calcium (Ca²⁺) is an immobile nutrient transported exclusively through the xylem via transpirational pull and root pressure mass flow. Under high VPD conditions (> 1.8 kPa), rapid foliar transpiration diverts Ca²⁺ to mature leaves, starving rapidly expanding distal fruit tissues and causing Blossom-End Rot (BER). This ...
Read Full Research Paper →Stoichiometric & Kinetic Modeling of Rubisco Carboxylation Efficiency under CO2 Enrichment
Atmospheric CO2 enrichment to 1,000 ppm in semi-closed greenhouses elevates sub-stomatal CO2 concentration (C_i) from 280 ppm to over 720 ppm, suppressing Rubisco oxygenation (V_o) by 68%. Incorporating enzyme kinetic constants from the KEGG Carbon Metabolism Pathway (sly01200), this paper presents a calibrated Farquha...
Read Full Research Paper →Plastidic Mitochondrial Coupling & Root-Zone Dissolved Oxygen (DO) Respiration Dynamics
Substrate hypoxia (DO < 3.0 mg/L) in recirculating DWC and slab hydroponics triggers root anaerobic fermentation, activating pyruvate decarboxylase (EC 4.1.1.1) and leading to ethanol accumulation and ATP depletion. This paper demonstrates that injecting micro-nano oxygen bubbles to maintain root-zone DO at supersatura...
Read Full Research Paper →Bioenergetic Modeling of Photorespiratory Nitrogen Flux & Stomatal Conductance
This doctoral-level research paper establishes a biophysical and enzymatic model coupling leaf-to-air Vapor Pressure Deficit (VPD), mesophyll stomatal conductance (g_s), and photorespiratory ammonium (NH4+) recycling via the plastidic Glutamine Synthetase-Glutamate Synthase (GS-GOGAT) cycle. By synthesizing high-resolu...
Read Full Research Paper →Osmotic Steering & Translocational Sucrose Accumulation Kinetics via Root-Zone EC Modulation
Enhancing fruit soluble solids content (°Brix) requires deliberate, controlled root-zone osmotic stress. This doctoral paper quantifies the enzymatic response of Sucrose Synthase (SUS, EC 2.4.1.13) and Acid Invertase (EC 3.2.1.26) when substrate electrical conductivity (EC) is dynamically elevated from 1.8 mS/cm to 4.2...
Read Full Research Paper →Elicitation Kinetics of Phenolic Antioxidants & Solanine Glycoalkaloids via UV-B Irradiance
Targeted UV-B radiation (280-315nm) activates the UVR8 dimeric photoreceptor, triggering COP1 signaling and up-regulating Phenylalanine Ammonia-Lyase (PAL, EC 4.3.1.24), the entry enzyme of the phenylpropanoid pathway. This doctoral paper demonstrates that delivering pulsed supplemental UV-B (1.5 W/m² for 45 minutes da...
Read Full Research Paper →Micro-Climatological Telemetry Coupling with USDA Wholesale Agricultural Price Elasticity
Agricultural commodity price volatility in major shipping terminals (e.g., Nogales Border Crossing, USDA Report 2315) is tightly coupled with regional weather anomalies in key production zones (e.g., Almería, Sinaloa). By combining 10-year daily solar radiation data (ALLSKY_KT) from the NASA POWER API with wholesale to...
Read Full Research Paper →Phosphate Transporter Gene Expression (Pht1 Family) and Arbuscular Mycorrhizal Symbiosis
Arbuscular Mycorrhizal Fungi (AMF, e.g., Rhizophagus irregularis) form symbiotic associations with 80% of terrestrial plants, enhancing inorganic phosphate (H2PO4⁻) uptake via fungal hyphae. However, standard hydroponic fertigation containing high inorganic P (> 2.0 mM) down-regulates root strigolactone exudation and r...
Read Full Research Paper →Metagenomic Characterization of Rhizosphere PGPR Siderophore Production in Organic Substrates
Plant Growth-Promoting Rhizobacteria (PGPR) enhance iron (Fe) availability in substrate hydroponics by secreting high-affinity iron-chelating molecules called siderophores (e.g., pyoverdine). This doctoral thesis employs 16S rRNA metagenomic sequencing to demonstrate that inoculating organic coco-peat substrates with a...
Read Full Research Paper →Boundary Layer Resistance (rb) & Micro-Vectored Canopy Air Speed Steering in Vertical Farms
In multi-tier vertical plant factories, stagnant air creates thick leaf boundary layers (δ > 8 mm), elevating boundary layer resistance (r_b > 250 s/m) and trapping humid air within dense crop canopies. This doctoral dissertation uses 3D Computational Fluid Dynamics (CFD) modeling to design a micro-vectored vertical ai...
Read Full Research Paper →Ready to Steer Your Facility with Precision?
AgriAtlas provides the biophysical and thermodynamic governing theory, while our interactive engineering simulators compute exact psychrometric Vapor Pressure Deficit (VPD), leaf boundary-layer transpiration, and structural U-value heating loads for your specific greenhouse or vertical farm geometry.