Fungi for pitch reduction and their preparation
AssigneeClariant Finance (BVI) Limited
InventorsRoberta L. Farrell, Yitzhak Hadar, Philip A. Wendler, Wendy Zimmerman
Life of this patent
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Abstract
Ascospores of wood-penetrating, pitch-grading fungi of the class of Ascomycotina and Deuteromycotina, eg. Ophiostromas, may be screened to provide fungi combining the properties of good growth on non-sterile wood substrates and minimized or even enhanced brightness effects for use in pitch reduction of wood substrates, eg. logs and wood chips. A new and improved method of isolating such ascospores involving effective suspension in an oil consumable by the fungus, eg. a vegetable oil, and then treatment of the oil with a dispersing agent is also disclosed.
Claims7
A biologically pure culture of a homokaryotic fungus of the genus Ophiostoma which has all the characteristics for pitch-degradation growth and brightness effects on a non-sterile substrate of a wood species on which a parent of the fungus grows in nature, of O. piliferum NRRL Accession No. 18677;
- such that upon treatment with said culture of a homokaryotic fungus of the genus Ophiostoma the pitch content, as measured using standard TAPPI procedure T204 OS-76, of the substrate is reduced by at least 20% in not more than 21 days without decreasing the brightness level, as measured using measurements on 10 gauge sawdust taken with a Photovolt reflection meter Model 670 calibrated by an enamel plaque in terms of paper brightness at 75.0, of the substrate by more than 10% compared to an untreated sterilized control.
A biologically pure culture of a homokaryotic fungus of the genus Ophiostoma which has all the characteristics for pitch-degradation growth and brightness effects on a non-sterile substrate of a wood species on which a parent of the fungus grows in nature, of O. piliferum NRRL Accession No. 18678;
- such that upon treatment with said culture of a homokaryotic fungus of the genus Ophiostoma the pitch content, as measured using standard TAPPI procedure T204 OS-76, of the substrate is reduced by at least 20% in not more than 21 days without decreasing the brightness level, as measured using measurements on 10 gauge sawdust taken with a Photovolt reflection meter Model 670 calibrated by an enamel plaque in terms of paper brightness at 75.0, of the substrate by more than 10% compared to an untreated sterilized control.
A biologically pure culture of a homokaryotic fungus of the genus Ophiostoma which has all the characteristics for pitch-degradation growth and brightness effects on a non-sterile substrate of a wood species on which a parent of the fungus grows in nature, of O. piliferum NRRL Accession No. 18755;
- such that upon treatment with said culture of a homokaryotic fungus of the genus Ophiostoma the pitch content, as measured using standard TAPPI procedure T204 OS-76, of the substrate is reduced by at least 20% in not more than 21 days without decreasing the brightness level, as measured using measurements on 10 gauge sawdust taken with a Photovolt reflection meter Model 670 calibrated by an enamel plaque in terms of paper brightness at 75.0, of the substrate by more than 10% compared to an untreated sterilized control.
A biologically pure culture of a homokaryotic fungus of the genus Ophiostoma which has all the characteristics for pitch-degradation growth and brightness effects on a non-sterile substrate of a wood species on which a parent of the fungus grows in nature, of O. piliferum NRRL Accession No. 18690;
- such that upon treatment with said culture of a homokaryotic fungus of the genus Ophiostoma the pitch content, as measured using standard TAPPI procedure T204 OS-76, of the substrate is reduced by at least 20% in not more than 21 days without decreasing the brightness level, as measured using measurements on 10 gauge sawdust taken with a Photovolt reflection meter Model 670 calibrated by an enamel plaque in terms of paper brightness at 75.0, of the substrate by more than 10% compared to an untreated sterilized control.
Dependencies are inferred from the claim text.