The present invention includes compositions and drying methods for preserving sensitive bioactive materials, such as peptides, proteins, hormones, nucleic acids, antibodies, drugs vaccines, yeast, bacteria (probiotic or otherwise), viruses and/or cell suspensions, in storage. The compositions include a carbohydrates component and a glass enhancer component, wherein the carbohydrate component includes a mixture of di-, oligo- and polysaccharides and the glass enhancer includes ions of organic acid and protein hydrolysates. The composition is prepared by dispersing all the solid components in a solution and then snap-frozen to form small beads, strings or droplets. The preferred drying method of the frozen beads, strings or droplets is initiated by a short purging and structure stabilizing step of the frozen particles under a vacuum pressure of less than 2000 mTORR and at a desired temperature. During the secondary and final drying step of the material a full vacuum pressure and elevated temperature are applied, to achieve a final desirable water activity of the dry material.
Qiong Tang - Columbia MD, US Trisha Rice - Columbia MD, US Kimberly Jennings - Laurel MD, US Brian Carpenter - Baltimore MD, US Roger Drewes - Hockessin DE, US Elizabeth Raditsis - Columbia MD, US January Scarbrough - Silver Spring MD, US
Dry stabilizing compositions for bioactive materials include sugars and hydrolyzed proteins, and may be formed into tablets or other forms providing enhanced stability for the bioactive material. Compositions containing the bioactive materials may be produced by a method that includes (a) combining the bioactive material with other ingredients in an aqueous solvent to form a viscous slurry; (b) snap-freezing the slurry in liquid nitrogen to form solid frozen particles, beads, droplets or strings; (c) primary drying by water removal under vacuum of the product of step (b) while maintaining it at a temperature above its freezing temperature; and (d) secondary drying of the product of step (c) at maximum vacuum and a temperature of 20 C. or higher for a time sufficient to reduce the water activity to below 0.3 Aw.
The present invention relates to stable bioactive substances and preparation thereof. A preparation method includes dissolving a bioactive material in a solution substantially free of solutes to make a bioactive solution, adsorbing the bioactive solution onto dry polysaccharide particles to make bioactive loaded polysaccharide particles, and drying the bioactive loaded polysaccharide particles.
Stabilizing Methods For Coating Seeds With Biological Materials
- Columbia MD, US Robert ACKERSON - Frankford DE, US Qiong TANG - Elkridge MD, US Stuart CANTOR - Mount Airy MD, US
Assignee:
Advanced Bionutrition Corp. - Columbia MD
International Classification:
A01C 1/06 A01N 63/00 C09D 105/00 C09D 7/40
Abstract:
The present invention provides a method for coating seeds with biological materials such as bacteria, fungi (e.g., yeasts and molds), parasites, recombinant vectors, and viruses. The method comprises (a) applying a moistening liquid to seeds to moisten seeds, wherein the moistening liquid comprises a moistening polymer, and (b) coating the moistened seeds with an effective amount of a dry composition, wherein the dry composition comprises biological materials, one or more disaccharides, one or more oligosaccharides, one or more polysaccharides, one or more carboxylic acid salts, and one or more hydrolyzed proteins. The coated seeds may have an initial water activity (Aw) below 0.4, and the microorganisms on the coated seeds have initial viability of at least 5 logs of colony forming units per gram of seeds (CFU/g seed). Also provided are coated seeds.
- Columbia MD, US Qiong Tang - Columbia MD, US Trisha Rice - Columbia MD, US Kimberly Jennings - Laurel MD, US Brian Carpenter - Baltimore MD, US Roger Drewes - Hockessin DE, US Elizabeth Raditsis - Columbia MD, US January Scarbrough - Silver Spring MD, US
Dry stabilizing compositions for bioactive materials include sugars and hydrolyzed proteins, and may be formed into tablets or other forms providing enhanced stability for the bioactive material. Compositions containing the bioactive materials may be produced by a method that includes (a) combining the bioactive material with other ingredients in an aqueous solvent to form a viscous slurry; (b) snap-freezing the slurry in liquid nitrogen to form solid frozen particles, beads, droplets or strings; (c) primary drying by water removal under vacuum of the product of step (b) while maintaining it at a temperature above its freezing temperature; and (d) secondary drying of the product of step (c) at maximum vacuum and a temperature of 20 C. or higher for a time sufficient to reduce the water activity to below 0.3 Aw.
- Columbia MD, US Qiong Tang - Columbia MD, US Trisha Rice - Columbia MD, US Kimberly Jennings - Laurel MD, US Brian Carpenter - Baltimore MD, US Roger Drewes - Hockessin DE, US Elizabeth Raditsis - Columbia MD, US January Scarbrough - Silver Spring MD, US
Dry stabilizing compositions for bioactive materials include sugars and hydrolyzed proteins, and may be formed into tablets or other forms providing enhanced stability for the bioactive material. Compositions containing the bioactive materials may be produced by a method that includes (a) combining the bioactive material with other ingredients in an aqueous solvent to form a viscous slurry; (b) snap-freezing the slurry in liquid nitrogen to form solid frozen particles, beads, droplets or strings; (c) primary drying by water removal under vacuum of the product of step (b) while maintaining it at a temperature above its freezing temperature; and (d) secondary drying of the product of step (c) at maximum vacuum and a temperature of 20 C. or higher for a time sufficient to reduce the water activity to below 0.3 Aw.
The present invention relates to stable bioactive substances and preparation thereof. A preparation method includes dissolving a bioactive material in a solution substantially free of solutes to make a bioactive solution, adsorbing the bioactive solution onto dry polysaccharide particles to make bioactive loaded polysaccharide particles, and drying the bioactive loaded polysaccharide particles.
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