C036 / R0976

Challenge C036-CH1 · approved draft version 1

summary

Dr. Jelena Marković (R0976) is a strong partial match for C036-CH1: her attributed work covers raspberry MAP gas composition for Serbian export, film OTR/CO₂TR screening with permeation modelling, pre-cooling effects on Botrytis, and temperature-driven shelf-life prediction on real Serbian consignments. This addresses the modelling gap and the film-specification translation the company lacks, but it does not by itself guarantee <1% mould at day 14; a bounded trial is the appropriate next step.

Claims: C1, C3, C7, C8

technicalRationale

Raspberry-specific evidence: a 5% O₂/15% CO₂ atmosphere cut Botrytis incidence 63% versus air and held firmness for 12 days at 2 °C, giving a defensible starting point for atmosphere targets.

Claims: C1, C2

Film specification capability: 12-film OTR/CO₂TR screening with finite-element gas-permeation modelling shows a method to convert measured permeability and headspace data into a candidate specification, matching the company's stated need to translate OTR/CO₂TR numbers into a film grade.

Claims: C3, C6

Condensation and pre-cooling: evidence on forced-air versus room cooling and hydrocooling links equilibration speed and free moisture to Botrytis incidence, relevant to the company's micro-condensation hypothesis.

Claims: C4

Cold-chain data use: existing work ingesting temperature/humidity streams into Botrytis-relevant prediction models indicates usable methodology for FreshPak's two seasons of logs and destination inspection reports.

Claims: C5

cooperationScope

Scope: a film-specification and trial-design project using FreshPak's lab (OTR/CO₂TR, headspace gas, seal strength) and historic shipment data, with milestones (a) translation of logs into a temperature/humidity profile, (b) modelled headspace and Botrytis risk ranking for a short candidate film list, (c) simulated-transit trial protocol and its execution, (d) pre-season consignment check.

Claims: C9, C10

Engagement form to agree: joint project and/or industrial PhD co-supervision, consistent with the researcher's stated openness.

Claims: C11

validation

Baseline: current lidding film and seal pressure run in the simulated-transit protocol, recording visible Botrytis incidence at days 9 and 14 and headspace O₂/CO₂. Candidate films are measured the same way, with model-predicted versus observed equilibrium gas composition compared per film and fill weight. Go/no-go: advance to the pre-season consignment check only if the best candidate reaches the agreed mould-incidence threshold and its observed headspace trend is consistent with the model; otherwise revise film, seal setting or pre-cooling before the season deadline.

Claims: C10, C2, C3, C4

constraints

Required inputs from FreshPak: the two current film grades and their measured OTR/CO₂TR, standard punnet geometry and fill weight, seal pressure range, two seasons of temperature/humidity logs and destination inspection reports, and lab time for headspace and seal testing. Engagement is limited to the researcher's lab and part-time involvement; no large external testing programme can be assumed given the stated budget.

Claims: C9, C11

What remains outside the supported scope: heat-seal and anti-fog film behaviour, micro-condensation control in the 125 g rPET shell, compostable-material migration, and full commercial deployment or a contractual one-percent mould guarantee.

Claims: C7, C8

unknowns

Open questions: which factor dominates visible mould (field inoculum, pre-cooling delay, condensation, atmosphere imbalance); how anti-fog chemistry and seal integrity interact with condensation; whether simulated transit reproduces German/Netherlands destination outcomes; and whether any candidate film can reach <1% at day 14 within budget.

Claims: C12, C8

Claims, evidence and limitations

C1 (fact)

Peer-reviewed work attributed to this researcher evaluated MAP of Serbian-grown raspberries at 2 °C over 14 days across three gas compositions, monitoring firmness, colour, soluble solids, titratable acidity and visual mould incidence plus Botrytis cinerea counts.

Results are at lab/experimental scale under controlled 2 °C storage, not on commercial export consignments.
Abstract-level report only; film OTR/CO₂TR of the tested films is not stated in the retrieved excerpt.

Evidence: ev-bda147b677efa8d3addea7535a4f6e5672ef9276bf4c3510a31acbab5cb6ffcf, ev-d9eb0223f959026ad43439dfd0eda1b881e27b73264020314f11c14dccc3557e

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C2 (fact)

The reported raspberry MAP study found that a 5% O₂/15% CO₂ atmosphere reduced Botrytis incidence by 63% relative to an ambient-air control and maintained firmness above commercial thresholds for 12 days versus 6 days in air, with sensory marketability at day 10 under optimal MAP.

63% reduction is relative to control, so it does not imply sub-1% absolute mould incidence by day 14.
Sensor panel marketability at day 10 falls short of the company's 14-day target.

Evidence: ev-bda147b677efa8d3addea7535a4f6e5672ef9276bf4c3510a31acbab5cb6ffcf, ev-d9eb0223f959026ad43439dfd0eda1b881e27b73264020314f11c14dccc3557e

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C3 (fact)

Related work attributed to this researcher screened 12 commercial films differing in OTR and CO₂TR for mixed-berry trays at 2 °C and used finite-element gas-permeation modelling to confirm headspace trends and predict equilibrium under alternative fill weights; one film (OTR 3,800, CO₂TR 18,000 cm³/m²/day) kept headspace within acceptable ranges for three species and cut mould incidence 55% versus a polyethylene control.

The tray was mixed-berry, not raspberry-only 125 g rPET punnet geometry.
Film specification values are reported as study findings and cannot be transferred to the company's punnet without local verification.

Evidence: ev-80eca36a544ce3fe1b178ebcaad01fce2fd20b2d7b849a79980c3340d72dda3d, ev-a41defb14c938608bcaf3fb079bd01e534f81ec53c74f4c5cff89c186c70c196, ev-beb656c1e3b9e50b412637677df85c860d6d41f10f11561580ac314d9dd7d009

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C4 (fact)

The researcher's raspberry MAP study also examined pre-cooling before sealing: forced-air cooling reached target core temperature in 38 minutes versus 210 minutes for room cooling, gave 14 hours earlier headspace O₂ equilibration, and was linked to significantly lower Botrytis incidence and better firmness at day 8; hydrocooling produced excess free moisture and calyx decay.

Findings concern pre-cooling protocols at 2 °C experimental scale; applicability to the company's packing-house line is unverified.
Day-8 outcomes do not demonstrate day-14 performance.

Evidence: ev-6b334ba93cd690401948064f998e6dbdbfb51c69944fe6382520f626101543ef, ev-ec74851f830c1426a8046403b416b6ad773dc75d55c9f4bd8bf4620390cfa109

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C5 (fact)

Attributed work translates cold-chain data into shelf-life prediction: a 12-month digital-twin pilot on Serbian berry consignments flagged 88% of consignments later showing elevated spoilage with 9% false positives, and a Monte Carlo stochastic model propagating temperature variability from 180 monitored consignments covered 91% of observed outcomes, identifying mean transport temperature and door-opening frequency as the dominant variance drivers.

The stochastic framework is demonstrated on strawberries and total aerobic count; Botrytis-specific calibration on raspberries is separate.
Modelling addresses prediction and prioritisation, not film selection by itself.

Evidence: ev-3494271a8665eb49e6b1619562714f7faec2d6155a41e9632051e6d3c50db4d2, ev-56865f93b4c1121fda88c2f3b372983e9c06f23af354f1eeb240af97cc900b6a, ev-9ee6767af448386d19bccb85108bf5b5decab35c3dcb09d1a1874682abaec387, ev-2edf60541dc8e19f0c9f37c2f3471e784657dd66ec8a31d8598cc5d4bb6fdfba

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C6 (fact)

A book chapter attributed to this researcher covers gas mass-balance modelling, film permeability selection, tray-geometry effects on headspace equilibration, and linkage of predictive microbiology to temperature-monitoring data, with a worked example of a forced-air pre-cooling and MAP line for a mid-sized raspberry exporter.

A textbook chapter is a methodological reference, not validation for FreshPak's specific punnet.

Evidence: ev-4b3b56deb17fdff8a2c416e981826a6ce06e244e7b45fe0e80cbb3085670ca1a, ev-52066555914095676adbf7b7fb00fd86afe63e1753db1826ccd199acc30418d7

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C7 (inference)

The combination of raspberry-specific MAP gas-mix results, film OTR/CO₂TR screening with permeation modelling, and temperature-driven Botrytis prediction plausibly covers the modelling gap FreshPak describes: converting measured OTR/CO₂TR and headspace data into a film specification for its 125 g rPET punnet at 2–4 °C.

No retrieved evidence shows work on heat-sealed anti-fog lidding film on 125 g rPET shells or on micro-condensation control specifically.
Semantic support of evidence for this challenge is unassessed; fit is inferred from abstract-level content.

Evidence: ev-bda147b677efa8d3addea7535a4f6e5672ef9276bf4c3510a31acbab5cb6ffcf, ev-80eca36a544ce3fe1b178ebcaad01fce2fd20b2d7b849a79980c3340d72dda3d, ev-3494271a8665eb49e6b1619562714f7faec2d6155a41e9632051e6d3c50db4d2, ev-56865f93b4c1121fda88c2f3b372983e9c06f23af354f1eeb240af97cc900b6a, ev-1ec051b879775ad9339348cc4d2d35131a7d016e92ba166f47f41c85286e4345

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C8 (inference)

Because the identified evidence is experimental and modelling-based rather than a validated commercial 14-day packing-house protocol, the realistic contribution is a bounded film-specification and trial-design study, not a guaranteed one-percent mould outcome.

The company's own two-season logs and two failed film grades are unexamined here; data quality is unknown.

Evidence: ev-80eca36a544ce3fe1b178ebcaad01fce2fd20b2d7b849a79980c3340d72dda3d, ev-bda147b677efa8d3addea7535a4f6e5672ef9276bf4c3510a31acbab5cb6ffcf, ev-b5793075e08d411021b1ea6e7fd4631495e8ad26f55e34b44f53fc2afa0ee230

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C9 (proposal)

Proposed pilot contribution: use FreshPak's OTR/CO₂TR and headspace measurements plus its two seasons of temperature, humidity and inspection data to (1) estimate raspberry respiration-driven target atmosphere at 2–4 °C, (2) rank a small set of candidate lidding films by modelled steady-state headspace and Botrytis risk, and (3) co-design a compact simulated-transit trial matrix.

Film candidates, data formats and lab-turnaround capacity must be confirmed with FreshPak.
Any timeline or number of candidate films is an assumption to agree, not a source fact.

Evidence: ev-80eca36a544ce3fe1b178ebcaad01fce2fd20b2d7b849a79980c3340d72dda3d, ev-bda147b677efa8d3addea7535a4f6e5672ef9276bf4c3510a31acbab5cb6ffcf, ev-3494271a8665eb49e6b1619562714f7faec2d6155a41e9632051e6d3c50db4d2, ev-4b3b56deb17fdff8a2c416e981826a6ce06e244e7b45fe0e80cbb3085670ca1a

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C10 (proposal)

Suggested milestones and go/no-go logic: baseline the current film and seal setting in simulated transit (mould incidence at day 9 and 14); measure headspace O₂/CO₂ and respiration for 1–3 proposed films; compare observed headspace against model predictions; proceed to a pre-season consignment check only if the best candidate meets an agreed mould-incidence and headspace-target threshold; otherwise revise the film or add pre-cooling/condensation measures.

Thresholds, replicates and consignment counts are proposals requiring agreement; the <1% day-14 target is the company's stated goal, not a demonstrated result.
Budget limits preclude a large external programme, so replicate counts may be constrained.

Evidence: ev-6b334ba93cd690401948064f998e6dbdbfb51c69944fe6382520f626101543ef, ev-80eca36a544ce3fe1b178ebcaad01fce2fd20b2d7b849a79980c3340d72dda3d, ev-bda147b677efa8d3addea7535a4f6e5672ef9276bf4c3510a31acbab5cb6ffcf

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C11 (fact)

Participation conditions recorded on the profile are industrial PhD supervision and joint projects, and the profile states prior work with three fruit exporters on packaging trials.

No restriction blocks this topic, but the exact form of engagement (sponsored project, PhD co-supervision, consultancy terms) is not specified.
Profile-level industry experience is self-described and not independently detailed in evidence.

Evidence: ev-96b8969c395c9216a3f367b33f3e76adde7079b1082f4e40f8d62a3618108492, ev-1dc8d54eaa6a86588bdaa7d6ce85f0c5cf53b38ea41939d332a4603a6325a7f0

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C12 (inference)

Unresolved questions include whether the visible mould arises from field inoculum, pre-cooling delay, condensation, or atmosphere imbalance; how seal integrity and anti-fog film behaviour interact with micro-condensation on this rPET shell; and whether simulated transit will reproduce the real German/Netherlands destination outcomes.

These questions follow from source content as gaps, not from experimental data on FreshPak's product.

Evidence: ev-6b334ba93cd690401948064f998e6dbdbfb51c69944fe6382520f626101543ef, ev-b5793075e08d411021b1ea6e7fd4631495e8ad26f55e34b44f53fc2afa0ee230

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