BACKGROUND The purpose of this study was to compare the efficacy of self-retaining stent (SRS) bicanalicular intubation with bicanalicular silicone (Crawford) intubation in patients with canalicular and punctal obstruction. METHODS In this prospective, randomized clinical trial, 38 patients with canalicular or punctal obstruction (25 partial, 13 complete) and epiphora were randomized into two...

In this study, a continuous fiber laser (1064 nm wavelength, 30 W/cm²) is used to irradiate multi-walled carbon nanotubes (MWCNTs) on different substrate surfaces. Effects of substrates on nano-welding of MWCNTs are investigated by scanning electron microscope (SEM). For MWCNTs on silica, after 3 s irradiation, nanoscale welding with good quality can be achieved due to breaking C-C bonds and fo...

The Failure on tube rod arm cylinder hydraulic excavator caused to lose production and processing time mining site. Investigation included visual inspection, chemical analysis, metallography analyze, microhardness test. Tube material used high silicon type while the standard ST52 carbon steel type. was broken crack several pieces. composition of has different in sulfur content. From hardness te...

In a patient in whom it was initially difficult to pass the duodenojejunal junction, a long decompression tube was easily inserted using double balloon endoscopy. The patient was a 16-year-old male with bowel obstruction who had undergone proctocolectomy for ulcerative colitis. A double balloon endoscope was inserted into the jejunum about 50 cm from the ligament of Treitz. A stiff hydrophilic-...

AIM Effects of homeopathic treatment with Hypericum perforatum (Hypericum) on peripheral nerve regeneration was studied using a rat sciatic nerve transection model. METHODS Fifty-four male healthy White Wistar rats were divided into three experimental groups (n = 18), randomly: Sham-operation (Sham), control: silicon tube (Sil) and treatment: silicon tube + Hypericum (Sil/Hypericum). In the S...

A uniformly distributed array of micro test tubes and microbeakers is formed on a p-type silicon substrate with tunable cross-section and distance of separation by anodic etching of the silicon wafer in N, N-dimethylformamide and hydrofluoric acid, which essentially leads to the formation of macroporous silicon templates. A reasonable control over the dimensions of the structures could be achie...

OBJECTIVE In order to develop a novel nerve guidance channel using porcine small intestinal submucosa (SIS) for nerve regeneration, we investigated the possibility of SIS, a tissue consisting of acellular collagen material without cellular immunogenicity, and containing many kinds of growth factors, as a natural material with a new bioactive functionality. METHODS Left sciatic nerves were cut...

We show that the number of concentric graphene cylinders forming a carbon nanotube can be found by squeezing the tube between an atomic force microscope tip and a silicon substrate. The compressed height of a single-walled nanotube (double-walled nanotube) is approximately two (four) times the interlayer spacing of graphite. Measured compression forces are consistent with the predicted bending ...

We advocate support of research aimed at developing alternatives to the photomultiplier tube for photon detection in large astroparticle experiments such as gamma-ray and neutrino astronomy, and direct dark matter detectors. Specifically, we discuss the development of large area photocathode microchannel plate photomultipliers and silicon photomultipliers. Both technologies have the potential t...