Cellulose acetate microwell plates for high-throughput colorimetric assays.

Single use plasticware (SUP) in scientific, diagnostic, and academic laboratories makes a significant contribution to plastic waste generation worldwide. Polystyrene (PS) microwell plates form a part of this waste. These plates are the backbone of high throughput colorimetric measurements in academic, research, and healthcare settings for detection/quantification of wide-ranging analytes including proteins, carbohydrates, nucleic acids, and enzyme activity.

Gallium nanoparticles as novel inhibitors of Aβ40 aggregation.

Alzheimer's disease (AD) has been consistently related to the formation of senile amyloid plaques mainly composed of amyloid β (Aβ) peptides. The toxicity of Aβ aggregates has been indicated to be responsible for AD pathology. One scenario to decrease Aβ toxicity is the development of effective inhibitors against Aβ amyloid formation.

Electrical characterization of a single electrospun porous nanostructured tin oxide ribbon.

A single nanostructured porous tin oxide ribbon, with its length, width and thickness of more than 1 mm, around 20 microm and around 20 nm, respectively, were fabricated using electrospinning, and electrically characterized in a temperature range between 300 K and 90 K, a magnetic field range from -9 to 9 T (negative sign stands for the reverse direction), and the environment of air and vacuum. The electrical conductivity (sigma) of the ribbon was found insensitive to magnetic field, but sensitive to temperature and environment. Its response time to air evacuation is 67+7 s.

Field effect devices and sensors based on electrospun polymer assisted tin oxide nanoribbons.

Electrospinning is presented as a facile method of preparing relatively long tin oxide (SnO2) nanofibers that are robust and stable in air. Upon heat treatment, the fibers collapse into a ribbon-like structure with surfaces that are not smooth, rather, are marked with several interconnected pathways. These nanoribbons were electrically characterized in a field effect transistor configuration in vacuum, with and without ultra violet (UV) light exposure.

[Behavior of vaginal trichomoniasis in a group of adolescents].

275 adolescents aged 10-19 receiving attention at the infantojuvenile department of pregnancy interruption and of sexually transmitted infections of "Ramón Gonzalez Coro" and "Eusebio Hernández" Gynecoobstetric Teaching Hospitals, both in Havana City, were studied from August, 1999, to September, 2000, aimed at knowing the behavior of the infection caused by Trichomonas vaginalis in this population group. The results yielded 18.1 % of positivity to parasitosis.