Preparation of rigid polyurethane foam from lignopolyol obtained through mild oxypropylation.

Lignin, one of the main components of lignocellulose, can be used as an alternative to chemical polyols in the production of polyurethane because of its abundant phenolic and alcohol hydroxyls. Traditionally, lignin is directly applied in the preparation of polyurethane; however, modified lignin has been proved to be superior, especially that obtained by the oxypropylation reaction. Therefore, lignopolyol obtained by mild and efficient oxypropylation was utilized in the production of rigid polyurethane foam in this study.

[Comparison between external fixator and DVR system for the treatment of AO type C distal radial fractures].

Objective: To compare the clinical effects of external fixator versus DVR system for the treatment of AO type C distal radius fractures.

Methods: The clinical data of 52 patients with type C distal radial fractures treated with external fixator or DVR system respectively from January 2009 to December 2013 were analyzed retrospectively. In DVR system group, 31 patients were treated by open reduction and internal fixation with DVR system, involved 11 males and 20 females, with an average age of(47.

Comparison of physical properties of regenerated cellulose films fabricated with different cellulose feedstocks in ionic liquid.

With the serious "white pollution" resulted from the non-biodegradable plastic films, considerable attention has been directed toward the development of renewable and biodegradable cellulose-based film materials as substitutes of petroleum-derived materials. In this study, environmentally friendly cellulose films were successfully prepared using different celluloses (pine, cotton, bamboo, MCC) as raw materials and ionic liquid 1-ethyl-3-methylimidazolium acetate as a solvent. The SEM and AFM indicated that all cellulose films displayed a homogeneous and smooth surface.

A five-year clinical and radiographic follow-up of bipolar hip arthroplasty with insertion of a porous-coated anatomic femoral component without cement.

Objective: To evaluate the clinical and radiographic outcomes of bipolar hip arthroplasty with a cementless porous-coated anatomic femoral component.

Methods: Fifty-nine patients (86 hips) with a minimum 3.5-year follow-up were followed up for a mean of 5.