The sustainability of the polymeric materials has become a fundamental challenge; therefore, development new biobased formulations gained increasing interest. Thermoset polyurethanes (PURs) present high performance and are competitive solution for structural composites. However, polyols used in PUR synthesis typically from petrochemical origin. Nowdays, broad range is available market, but ther...

Efficient and reliable protoplasting, regeneration, and fusion techniques were established for the prototrophic strain Bacillus stearothermophilus NUB36. Auxotrophic mutants were isolated, and protoplast fusion was used to construct isogenic mutant strains and for chromosomal mapping. Markers were mapped using two-, three-, and four-factor crosses. The order of the markers was hom-1-thr-1-his-1...

There are many interesting aspects of the case on the Brita Products Company. Two of these issues are highlighted at the end of the case. First, Brita learns that a retailer, Target Stores, has installed a display which compares alternative filtration products on their ability to remove contaminants from water. Brita does poorly on this comparison relative to PUR. Second, Brita learns that Proc...

Abstract The assessment of the environmental impacts an aircraft and its components parts should go beyond use phase when assessing sustainability circularity. Environmental from manufacturing phases e.g. related to consumption resources, pollutions, hazardous materials as well those end-of-life must not be neglected. Hence, a life cycle (LCA) screening has been conducted based on case example ...

Introduction: While autologous bone may be the ideal graft material for use in reconstructive orthopaedic surgery, its harvesting often causes donor site morbidity and has limited availability. Thus, synthetic or biological material substitutes have been increasingly studied for bone tissue repair. We have developed injectable biodegradable polyurethane (PUR) scaffolds with high porosity (>90%)...

Chronic amphetamine intake leads to neurogenic bladder and chronic urinary retention. The mechanism underlying persistent urinary retention is unclear. The pelvic-urethral reflex (PUR) is essential for the urethra to develop sufficient resistance to maintain urine continence, an important function of the urinary system. Recent studies on PUR activities have indicated that repetitive/tetanic sti...