[Peripapillary pachychoroid syndrome].

Peripapillary pachychoroid syndrome (PPS) is a recently described condition, classified within the pachychoroid disease spectrum characterized by focal or diffuse thickening of the choroid due to dilation of choroidal vessels in the Haller's layer (pachyvessels), thinning of the choriocapillaris and the Sattler's layer, and accompanied by increased choroidal permeability and damage to the retinal pigment epithelium. Unlike other pachychoroid diseases that involve changes in the central retina, PPS presents with choroidal thickening and intra- or subretinal fluid located nasally in the macular region, near the optic disc. This review aims to summarize and analyze current data on the clinical features, pathogenesis, and treatment options for PPS found in the literature.

Self-healing in dielectric capacitors: a universal method to computationally rate newly introduced energy storage designs.

Metalized-film dielectric capacitors provide lump portions of energy on demand. While the capacities of various capacitor designs are comparable in magnitude, their stabilities make a difference. Dielectric breakdowns - micro-discharges - routinely occur in capacitors due to the inevitable presence of localized structure defects.

Meso-Macroporous Hydroxyapatite Powders Synthesized in Polyvinyl Alcohol or Polyvinylpyrrolidone Media.

Mesoporous hydroxyapatite (HA) is widely used in various applications, such as the biomedical field, as a catalytic, as a sensor, and many others. The aim of this work was to obtain HA powders by means of chemical precipitation in a medium containing a polymer-polyvinyl alcohol or polyvinylpyrrolidone (PVP)-with concentrations ranging from 0 to 10%. The HA powders were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, atomic emission spectroscopy with inductively coupled plasma, electron paramagnetic resonance, scanning electron microscopy (SEM), and transmission electron microscopy (TEM).

Interactions between diet and gut microbiota in cancer.

Dietary patterns and specific dietary components, in concert with the gut microbiota, can jointly shape susceptibility, resistance and therapeutic response to cancer. Which diet-microbial interactions contribute to or mitigate carcinogenesis and how they work are important questions in this growing field. Here we interpret studies of diet-microbial interactions to assess dietary determinants of intestinal colonization by opportunistic and oncogenic bacteria.

The Role of the Microbiome in the Etiopathogenesis of Colon Cancer.

Studies in preclinical models support that the gut microbiota play a critical role in the development and progression of colorectal cancer (CRC). Specific microbial species and their corresponding virulence factors or associated small molecules can contribute to CRC development and progression either via direct effects on the neoplastic transformation of epithelial cells or through interactions with the host immune system. Induction of DNA damage, activation of Wnt/β-catenin and NF-κB proinflammatory pathways, and alteration of the nutrient's availability and the metabolic activity of cancer cells are the main mechanisms by which the microbiota contribute to CRC.