Abstract:
The present invention relates to cellulose-based materials comprising nanofibrillated cellulose (NFC) from native cellulose. exhibiting highly superior properties as compared to other cellulose-based materials, a method for preparing such cellulose-based material, and uses thereof are also disclosed.
Abstract:
Biocompatible polyhydroxyalkanoate compositions, particularly based on biotechnologically produced homo- and copolymers of 4- hydroxybutyric acid, with controlled degradation rates have been developed. In one embodiment, the polyhydroxyalkanoates contain additives like, for example, pore forming agents to alter the degradation rates. In another embodiment, the polyhydroxyalkanoates are formed of mixtures of monomers or include pendant groups or modifications in their backbones to alter their degradation rates. In still another embodiment, the polyhydroxyalkanoates are chemically modified. Methods for manufacturing the devices which increase porosity or exposed surface area can be used to alter degradability. As demonstrated by the examples, these polyhydroxyalkanoate compositions have extremely favorable mechanical properties, as well as are biocompatible and degrade within desirable time frames under physioogical conditions. These polyhydroxyalkanoate materials provide a wider range of polyhydroxyalkanoate degradation rates than are currently available. Methods for processing these materials, particularly for therapeutic, prophylactic or diagnostic applications, or into devices which can be implanted or injected, are also described.
Abstract:
The invention relates to a porous polymeric particle that may be used as a filtration or separation media.. For example, the particle may be used as part of a filtration device such as those utilized by the beverage, pharmaceutical, or biotechnology industry, or as a loose filtration media similar to diatomaceous earth, which is used in equipment such as pressure leaf, candle, press, or rotary vacuum filters. Methods of making the porous particles are also described.
Abstract:
The invention relates to a porous polymeric particle that may be used as a filtration or separation media.. For example, the particle may be used as part of a filtration device such as those utilized by the beverage, pharmaceutical, or biotechnology industry, or as a loose filtration media similar to diatomaceous earth, which is used in equipment such as pressure leaf, candle, press, or rotary vacuum filters. Methods of making the porous particles are also described.