Etching Kinetics of Nanodiamond Seeds in the Early Stages of CVD Diamond Growth.

We present an experimental study on the etching of detonation nanodiamond (DND) seeds during typical microwave chemical vapor deposition (MWCVD) conditions leading to ultra-thin diamond film formation, which is fundamental for many technological applications. The temporal evolution of the surface density of seeds on the Si(100) substrate has been assessed by scanning electron microscopy (SEM). The resulting kinetics have been explained in the framework of a model based on the effect of the particle size, according to the Young-Laplace equation, on both chemical potential of carbon atoms in DND and activation energy of the reaction with atomic hydrogen.

Paper-based electrochemical peptide nucleic acid (PNA) biosensor for detection of miRNA-492: a pancreatic ductal adenocarcinoma biomarker.

Pancreatic ductal adenocarcinoma is the predominant neoplastic disease of the pancreas and it represents the fourth most frequent cause of death in cancer-related disease, with only 8% of survivors after 5-year to the diagnosis. The main issues of this type of cancer rely on fast progress (i.e.

Candida albicans interface infection after deep anterior lamellar keratoplasty.

Purpose: To report a case of interface infection by Candida albicans after deep anterior lamellar keratoplasty (DALK).

Methods: A 30-year-old man with keratoconus underwent DALK. Four weeks after surgery, the patient developed multiple infiltrates in the graft-host interface with absence of intraocular infection.

Frequency of positive donor rim cultures after penetrating keratoplasty using hypothermic and organ-cultured donor corneas.

Purpose: To compare the frequency of positive rim cultures after penetrating keratoplasty using corneas preserved by hypothermic and organ culture storage. To evaluate the influence of standard procurement techniques on the frequency of microbial donor rim contamination.

Methods: Six hundred four donor corneas stored at 31 degrees C and 214 at 4 degrees C were studied.

[Comparison between bacterial contamination of the circular circuit and of the non-rebreathing circle used with an antibacterial filter].

In order to evaluate whether the risk of bacterial contamination increased during low-flow anaesthesia without bacterial filter compared with non-rebreathing anaesthesia with a disposable bacterial filter, two groups of patient were studied. In the first group a disposable circle absorber system was changed once daily, thus it was used for several patients. In the second group a non-rebreathing system was connected to a disposable bacterial filter before each surgical procedure.

A clinical-immunological evaluation of AIDS cases and related syndromes.

The clinical features of our cases demonstrated some of the already known characteristics of the variable spectrum of HIV infection. DA are the most important risk category in Italy. 10% of the ARC cases evolved into AIDS during a 12-month follow-up, on average.

[Notes on immunology in a series of cases of chronic hepatitis. Cellular immunity and stimulation with PPD].

The authors estimated E, E.A.C.