Multifunctional coatings created using an antimicrobial polymer as a platform for titania precipitation on cotton

Titania precipitation on cotton has been achieved using a commercially available antimicrobial polymer, Reputex 20. The cotton swatches precipitated with titania retain antimicrobial activity, and we have also shown the ability to encapsulate diisopropylfluorophosphatase (DFPase), an enzyme capable of breaking down organofluorophosphates. Cotton swatches are easily prepared and precipitation occurs at room temperature in aqueous solutions at neutral pH. Both the antimicrobial properties of Reputex 20 and the hydrolytic activity of the DFPase enzyme are retained after titania precipitation, generating a cotton material exhibiting multifunctional properties. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43199.     

Synthesis,characterization, and application of oligomer‐type‐based phosphites

Organic alkyl and aryl phosphites are effective antioxidants and photostabilizers with applications in a wide range of polymers. The primary role of phosphites is to decompose hydroperoxide. However, aryl phosphites are also capable of reacting as antioxidants by affecting the kinetics. In particular, oligomer‐type phosphites have a greater effect on polymer degradation because of their high compatibility, reactivity, and solubility with almost all polymers. Generally, phosphites are sensitive to hydrolysis. In order to overcome this hydrolytic sensitivity in phosphites, a novel hydrolytically stable oligomeric phosphite incorporating a sterically hindered aromatic alcohol (2,4‐di‐tert‐butyl‐6‐methylphenol) that gives hydrolytic stability to the phosphite was synthesized and characterized, and its performance as an antioxidant for polypropylene was investigated. J. VINYL ADDIT. TECHNOL., 22:146–155, 2016. © 2014 Society of Plastics Engineers     

Unique high-bandwidth UV fiber delivery system for the OMEGAdiagnostics applications

A special fiber-optic signal delivery system for 351-nm pulse-shape measurements has been developed in the contest of a large laser fusion facility. To deliver a sufficient signal and preserve an overall bandwidth of >33 GHz over a distance of ~15 m, a seven-fiber bundle of gradient-index fiber was developed, fabricated, and tested, and is now applied in routine operation     

Tea and coffee consumption in relation to vitamin D and calcium levels in Saudi adolescents

ABSTRACT: BACKGROUND: Coffee and tea consumption was hypothesized to interact with variants of vitamin D-receptor polymorphisms, but limited evidence exists. Here we determine for the first time whether increased coffee and tea consumption affects circulating levels of 25-hydroxyvitamin D in a cohort of Saudi adolescents. METHODS: A total of 330 randomly selected Saudi adolescents were included. Anthropometrics were recorded and fasting blood samples were analyzed for routine analysis of fasting glucose, lipid levels, calcium, albumin and phosphorous. Frequency of coffee and tea intake was noted. 25-hydroxyvitamin D levels were measured using enzyme-linked immunosorbent assays. RESULTS: Improved lipid profiles were observed in both boys and girls, as demonstrated by increased levels of HDL-cholesterol, even after controlling for age and BMI, among those consuming 9--12 cups of coffee/week. Vitamin D levels were significantly highest among those consuming 9--12 cups of tea/week in all subjects (p-value 0.009) independent of age, gender, BMI, physical activity and sun exposure. CONCLUSION: This study suggests a link between tea consumption and vitamin D levels in a cohort of Saudi adolescents, independent of age, BMI, gender, physical activity and sun exposure. These findings should be confirmed prospectively.     

Partial hepatectomy after post-traumatic liver abscess

Post-traumatic pyogenic liver abscess is a rare disease. We present the case of a 38-year-old man with multilocular liver abscess and pleural empyema following blunt abdominal trauma. The patient had a prodrome lasting 3 months before presenting in our department. The therapy included partial hepatectomy and pleural drainage. Clinical signs, diagnosis and possible therapy are discussed in this case report.     

The role of human factors in flexibility management: A survey

Flexibility can be defined as the ability to respond effectively to the ever‐changing and increasing needs of the customer. For this demand to be satisfied, flexibility should be built into the total chain of acquisition, processing, and distribution stages. As a result, there is an increasing interest in flexibility and flexibility enabling mechanisms/parameters to achieve the best strategy for obtaining the right and desired output. Although quite a number of flexibility definitions and mechanisms can be found in the literature, flexibility remains poorly understood and utilized in practice. That is due to the lack of standardization in the terminology about the flexibility definitions and mechanisms. This article presents the finding of an extensive literature survey to determine the Intra flexibility mechanisms/parameters. These mechanisms/parameters are then classified, according to their contribution to the supply chain stages and their interaction with Inter Flexibility mechanisms (e.g., Organizational structure flexibility, Technology flexibility, Information system flexibility, and Human resource flexibility). In addition, the crucial role of human factors and its relationship with flexibility mechanisms are investigated, and related flexibility mechanisms are identified. © 2002 John Wiley & Sons, Inc.     

Measurement of ascorbic acid and erythorbic acid in processed meat by HPLC

A simple and efficient HPLC method is described to measure both ascorbic and erythorbic acid separately in processed meat products. The system used consisted of a reversed-phase column, a mobile phase containing an ion-pairing agent and ultraviolet detection. The procedure, which was checked on a variety of samples, was found to give reproducible and reliable results.