Dark growth
Solazyme, working under NIST Cooperative Agreement 70NANB7H7002, reported that selected strains—including UTEX 572, UTEX 2441, and N-836—could grow in darkness when supplied with fixed carbon.
Algae Biofuel Feasibility Initiative
Can two separate lines of algae research be made to work together?
Botryococcus can produce long-chain hydrocarbons. Some strains have grown in darkness on fixed carbon. Other strains later showed much higher hydrocarbon fractions under light. The combined performance has not been established.
Five-page human-edited research proposal · PDF
The evidence supports a controlled experiment.
It does not yet support a claim of commercial viability or deliberate suppression.The corrected account
Two findings developed at different times.
The research question is whether they can be combined without losing the feature that made either one promising.
Higher-hydrocarbon strains
Later illuminated-culture comparisons reported extracellular hydrocarbon fractions of approximately 51.6% for Bot22, 49.3% for Showa, and 39.9% for CCAP 807/2.
The missing experiment
Those percentages were not obtained under dark fermentation. They cannot be combined mathematically with the older growth results. The combined performance has to be measured.
What the record supports
- Botryococcus braunii can synthesize hydrocarbon molecules directly.
- Heterotrophic growth has been reported for some strains and conditions.
- Later work identified strains with much larger extracellular hydrocarbon fractions under photoautotrophy.
- A limited reproducibility and strain-screening study is technically justified.
What it does not establish
- That a commercially competitive fuel process already exists.
- That high-hydrocarbon strains will retain their output in darkness.
- That any company or agency deliberately suppressed a viable technology.
- That lapsed patents alone provide freedom to operate commercially.
The decision metric
Recoverable hydrocarbon productivity
Hydrocarbon percentage alone is not enough. A strain may contain a large hydrocarbon fraction and still produce too little material per reactor volume and time to matter commercially.
grams of recoverable hydrocarbon
per liter of reactor volume
per day
g/L/day
A staged feasibility study
Measurements decide whether the work continues.
Each phase has a decision point. Negative or irreproducible results are reasons to stop or redesign—not reasons to make a larger claim.
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Phase I
Reproduce the historical result
Begin with a public historical strain, preferably UTEX 572. Compare illuminated and dark fixed-carbon cultures from the same inoculum and confirm both biomass growth and hydrocarbon identity.
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Phase II
Screen later strains
Apply the same framework to Showa, Bot22, CCAP 807/2, and NIES-836, subject to availability and material-transfer terms. Rank them by measured recoverable productivity.
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Phase III
Test realistic carbon sources
Only after a strain performs should the study examine low-value agricultural or food-processing carbon streams and measure hydrocarbon yield per unit of substrate consumed.
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Phase IV
Test repeated recovery
Determine whether extracellular hydrocarbons can be recovered repeatedly without progressive loss of culture health or productivity.
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Phase V
Consider genetic optimization only if warranted
Genetic work follows the natural-strain screen. It should not precede evidence that the underlying cultivation and recovery process is worth improving.
Patents and public records
Open the published work and protect Rhode Island’s interest.
The historical work appears in U.S. Patent 8,278,090 B1 and its divisional patent, U.S. Patent 8,956,852 B2. Both later lapsed for nonpayment of maintenance fees.
Their published specifications provide an experimental starting point. Alan’s proposal is for the Attorney General to help qualified Rhode Island researchers gain practical access to that public technical record, identify any related rights that remain in force, and clear a lawful path to a feasibility study.
Before commercialization, qualified counsel would still need to examine related patent families, extraction and upgrading claims, genetically modified algae, strain deposits, and material-transfer restrictions.
The Attorney General’s role
Facilitate access. Clear the legal path. Keep Rhode Island protected.
The Attorney General would not run the laboratory or predetermine the scientific result. The office would use its legal and convening authority to bring together the patent record, qualified counsel, state partners, and independent researchers; establish the conditions under which the work may proceed; and enforce the protections Rhode Island negotiates.
That approach permits investigation without accusation and innovation without surrendering the public’s interest.
Read the full proposal
The next step is a limited test, not a promise.
The proposal identifies the strains, measurements, decision points, intellectual-property questions, and conditions that would justify—or end—further work.
The document is a research feasibility framework, not a cost claim, an offer, or a freedom-to-operate opinion.