Polyesters such as polyethylene terephthalate are widely used in textile fibers, films, and packaging of food and beverages. Originally driven by environmental reasons, recycling of postconsumer polyester bottles into textile fibers is now becoming commercially attractive. We studied the chemical recycling wherein part of the virgin raw-materials during preparation of polyester was replaced by washed post consumer polyester. During the process, the postconsumer polyester undergoes partial depolymerization before repolymerization. Role of reactoragitator configuration in achieving the solid-slurry and solid-melt mixing, and in depolymerization, was studied. Finally, suitability of the polymer for melt spinning and drawing of polymer into yarn was examined. V C 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123: [520][521][522][523][524][525] 2012

Root canal system is complex to understand because of its unpredictable nature. It differs for different teeth and for the same teeth in different individuals. Successful endodontic therapy thus depends on the clinician's ability to anticipate and look for these variations. A mandibular first molar with six root canals represents a rare anatomical variant, particularly when four canals are found in distal root. This case report discusses successful nonsurgical endodontic management of two-root mandibular first molar with four distal canals and two mesial canals reported for the first time in Indian population. Cone beam computed tomography was used as a diagnostic method to confirm the position and presence of 4 root canals in the distal root.

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The management of cervical sub axial spondylolisthesis is a challenging task for all spinal care specialists because there is a lack of literature on the disease's diverse clinical presentations. Sub axial spondylolisthesis is a freak injury with a wide range of clinical manifestations. Particularly decisionmaking concerning the monitoring of such patients is difficult in a secondary trauma centre. The spinal column is a dynamic system that protects nervous innervation throughout the body while also enabling the head and neck to move freely. Spinal cord fractures are a major cause of mobility and mortality in trauma patients and a skeletal fracture is linked to 56% of cervical spinal cord traumas. Cervical spines fractures are classified based on the degree involved and are traditionally divided into three groups: C1, C2 and sub-axial spine (C3 to C7). Severe spinal cord injury and quadriparesis are commonly associated with trauma-related high-grade spondylolisthesis in the sub axial cervical spine. In rare circumstances, such pathology has resulted in minimal to no neurological deficits. We present a case of 45-year-old male presented with alleged history of fall from bike and is associated with history of injury over neck and over head with no other significant clinical complaints.