Finely Tunable Carbon Nanofiber Catalysts for the Efficient Production of HMF in Biphasic MIBK/HO Systems.

This work proposes catalytic systems for fructose dehydration to 5-hydroxymethylfurfural using a series of functionalized carbon nanofibers. The catalysts were synthesized via finely selected covalent grafting in order to include a variety of functionalities like pure Bronsted acid, tandem Brønsted/Lewis acid, and tandem Lewis acid/Lewis base catalysts. After the characterization and evaluation of acidity strength and the amount of acid centers, the catalyst series was screened and related to the product distribution.

[Disseminated tuberculosis revealed by epididymal localization in an immunocompetent patient: a case report].

Epididymal tuberculosis is rare and often presents diagnostic difficulties. It may be indicative of a disseminated form of the infection, which is the case of our patient. A 19-year-old man, with no past medical history, was admitted for a swollen painful left scrotum that had been evolving for 8 months.

Functionalized Biochars as Supports for Ru/C Catalysts: Tunable and Efficient Materials for γ-Valerolactone Production.

Cotton stalks-based biochars were prepared and used to synthetize Ru-supported catalysts for selective production of γ-valerolactone from levulinic acid in aqueous media. Different biochars' pre-treatments (HNO, ZnCl, CO or a combination of them) were carried out to activate the final carbonaceous support. Nitric acid treatment resulted in microporous biochars with high surface area, whereas the chemical activation with ZnCl substantially increases the mesoporous surface.

Comparison of Vocal Fatigue in Speech Therapists With Other Rehabilitation Therapists.

Introduction: Voice, as one of the most important communication tools in humans, can cause many problems in a person's daily life if it is damaged. One type of voice complaint is vocal fatigue, which is common among people who use their voices a lot. Rehabilitation therapists may be more vulnerable to a variety of vocal disorders and complaints due to extensive voice use and long-term relationships with clients.

Validation of the Arabic version of the Bergen Facebook Addiction Scale in Tunisian adolescents.

Background: Facebook is by far the most popular social network. Thus, it is important to use a valid measuring tool. This study aimed to validate an Arabic version of the Bergen Facebook Addiction Scale (BFAS).