PURPOSE To clarify the relationship between variations in posterior vitreous detachments (PVDs) and visual prognoses in idiopathic epiretinal membranes (ERMs). METHODS In this retrospective, observational, and consecutive case series, we observed variations in PVDs in 37 patients (mean age, 65.7±11.0 years) with ERMs and followed them for 2 years. Three PVD types were found biomicroscopically...

In the present work Taguchi method is used to optimize cutting parameters during dry turning of AISI 304 austenitic stainless steel with AlTiCrN coated tool. The coating was deposited on fine-grained K-grade (ISO K-20) cemented carbide cutting insert using physical vapor deposition (PVD) technique. The turning parameters evaluated are cutting speed of 200 and 260 m/min, feed rate of 0.20 and 0....

Infection associated with biomaterials used for orthopedic prostheses remains a serious complication in orthopedics, especially tumor surgery. Silver-coating of orthopedic (mega)prostheses proved its efficiency in reducing infections but has been limited to surface areas exposed to soft tissues due to concerns of silver inhibiting osseous integration of cementless stems. To close this gap in th...

Pseudomonas spp. have the capacity to utilize siderophores produced by diverse species of bacteria and fungi, and the present study was initiated to determine if siderophores produced by rhizosphere microorganisms enhance the levels of iron available to a strain of Pseudomonas putida in this natural habitat. We used a previously described transcriptional fusion (pvd-inaZ) between an iron-regula...

A patient’s body accepting a bone implant depends not only on the biomaterial used, but also its surface, which allows it to properly interact with cells. Therefore, research has focused improving bioactive and tribological properties of titanium alloys. Commercially pure (cp-Ti) is widely used as biomedical material. However, characterized by unsuitable properties. In this work, yttria-stabili...

To acquire iron, Pseudomonas aeruginosa secretes the fluorescent siderophore pyoverdine (Pvd), which chelates iron and shuttles it into the cells via the specific outer membrane transporter FpvA. We studied the role of iron and other metals in the binding and transport of Pvd by FpvA and conclude that there is no significant affinity between FpvA and metal-free Pvd. We found that the fluorescen...

We elucidate the separate effect of a thin Cr coating deposited by physical vapor deposition (PVD) on subcooled flow boiling performance zircaloy-4. First, we run experiments prototypical zircaloy-4 surfaces mimicking scratch pattern and surface roughness nuclear reactor claddings. Then, PVD-coat 0.3 µm thick chromium layer same exact repeat investigations. All are using deionized water at atmo...

Hard coatings, such as AlTiN-TiSiN, deposited by Physical Vapor Deposition (PVD) techniques are widely used in industrial applications to protect and increase the lifetime of components, cutting tools, dies, forming tools. Despite their great properties, high hardness wear oxidation resistance, they limited cases severe conditions due poor adhesion between coating substrate. Duplex treatments h...