Strength microbial degradation

Advantages The major advantages of the thermoplastic-based disposal systems are by dispiosin of the waste in a dry condition, the overall volume of the waste is greatly reduced most thermoplastic matrix materials are resistant to attack by aqueous solutions microbial degradation is minimal most matrices adhere well to incorporated materials, therefore, the final product has good strength and materials embedded in a thermoplastic matrix can be reclaimed if needed. 

The public view of WPCs is hard to evaluate more or less objectively. Many have never heard of WPCs. Many prefer real wood, and they are hard to blame. Wood is an excellent material, far exceeding WPC in many properties, first of all in strength and stiffness, in slip resistance, and in many types of wood—in fire resistance (except PVC-based wood composites). Common wood, however, is an inferior material compared to WPC with respect to water absorption, microbial degradation, and durability. There are exceptional types... 

The natural wax content serves as a protective barrier both to water penetration and to microbial degradation of the underlying polysaccharides. The wax serves as a lubricant that is essential for proper spinning of cotton fiber into yarn. Once the yarn is spun, however, the wax does reduce the tensile strength of the yarn as well as hinders dyeing and finishing of... 

Failed USP dissolution test requirements Microbial contamination of non-sterile products Lack of efficacy Impurities/degradation products Lack of assurance of sterility Lack of product stability Labeling Label error on declared strength Misbranded Promotional literature with unapproved therapeutic claims... 

Soil burial tests are important in the assessment of the degradation of a range of polymers by the corresponding microflora. They are performed either under field or laboratory conditions with the use of specific strains without the presence of any additional carbon source other than that supplied from the polymer (Whitney, 1996). There are certain drawbacks that should be taken into account, namely the lack of reproducibility due to the climatic conditions and the change of the microbial soil flora when in situ experiments are performed. However, in situ soil burial tests are often the most useful when the extent of biodegradability of a material is sought, especially when combined with tensile strength tests and microscopic examinations (Cain, 1992). 

---