The sensitivity of fibroblast guidance on directional cues provided by aligned nanofibers is studied for scaffolds of successively smaller fiber sizes (740±280, 245±85, 140±40, and 80±10 nm) fabricated using mandrel and electrical alignment methodologies for electrospun nanofibers (∼10° angular deviation (AD)), as well as nanoimprint methodologies for perfectly aligned fibers (0° AD). On aligne...

Human promyelocytic leukaemia (HL-60) cells were employed to study the induction of NAD(+)-dependent 15-hydroxyprostaglandin dehydrogenase (15-PGDH), the key enzyme in controlling prostaglandin inactivation. Phorbol 12-myristate 13-acetate (PMA) stimulated 15-PGDH activity in a time- and concentration-dependent manner. Dimethyl sulphoxide (DMSO) also stimulated the enzyme activity, although a m...

The antimicrobial effects of 405 nm light have generated interest in its use as an emerging disinfection technology with potential food-related applications. The aim of this study was to assess the bactericidal efficacy of 405 nm light for inactivation of Escherichia coli and Listeria monocytogenes under sub-lethally stressed environmental conditions. Bacteria were exposed to 405 nm light from ...

Atmospheric pressure plasma (APP) is an emerging nonthermal microbial inactivation technique. In this study, agar and raw chicken breast were inoculated with Escherichia coli and treated with an APP jet based on cold arc plasma. The aim of this study was to investigate the optimum conditions for the plasma treatment of an APP jet in order to maximize the efficiency of E. coli inactivation. The ...

The scaling of transistors to sub-10 nm dimensions is strongly limited by their contact resistance (RC). Here we present a systematic study of scaling MoS2 devices and contacts with varying electrode metals and controlled deposition conditions, over a wide range of temperatures (80 to 500 K), carrier densities (10(12) to 10(13) cm(-2)), and contact dimensions (20 to 500 nm). We uncover that Au ...

in this study response surface methodology was used to optimize process conditions and to evaluate the effect of ultrasound on quality attributes (antioxidant activity, ph, total soluble solid, turbidity) and the inactivation of escherichia coli bacteria in carrot juice. independent variables in this study were temperature (25-50°c), time (20-40 min) and frequency (0-130 khz). in this study the...

the affinity of low density lipoprotein(ldl) to its receptor is very important, because most of ldl-uptake pathway is done by the ldl receptor and the change in size of ldl particle and the modification in its components may affect the ldl affinity for its receptor. in this study, the effects of a powerful lipid-soluble antioxidant “ubiquinol-10” have been investigated on the affinity of ldl to...