Alkyl chains of naturally occurring fatty acids usually adopt the strain-free extended conformation in solution or gas phase. However, the conformations of alkyl chains are highly environment-dependent. Sometimes they adopt unusual, seemingly high-energy conformations. For example, alkyl chains confined in synthetic hosts adopt helical conformations. Another example is U-shaped conformations. F...

High-order dispersion introduced by Gires–Tournois interferometer mirrors usually causes spectral sidebands in the near-zero region of mode-locked fiber lasers. Here, we demonstrate a sideband-free Yb-doped laser with dispersion-compensating mirrors. Both simulation and experiment that wavelength energy can be tuned changing transmission coefficient output mirror, pump power, ratio net cavity t...

BACKGROUND The carotid canal (CC) located in the petrous temporal bone transmits the internal carotid artery, internal carotid venous plexus and sympathetic nerve plexus from the neck into the cranial cavity. It is an accessible passage into the cranial cavity and is considered an important anatomical landmark for neurosurgeons. The aim of this study was to investigate the topographical, morpho...

background paracentesis is a common bedside therapeutic and diagnostic procedure that requires insertion of a catheter into the peritoneal cavity; however, lack of a specialized fixator for securing the catheter causes frequent catheter kinking and patient discomfort. objectives this study aimed to demonstrate the efficacy of a designed paracentesis fixator in reducing patient discomfort and pr...

Summary Analysis of a soil sample from Aizawl district Mizoram, India, led to the discovery Mulveyellus aizawlensis sp. n. The new species is presented with female morphological data and molecular D2-D3 expansion segment 28S 18S rDNA, phylogenetic analysis based on these sequences. morphologically characterised by ventrally arcuate body, presence minute transverse striations cuticle, barrel-sha...

Abstract In this paper, a sub-wavelength metal-insulator-metal (MIM) waveguide structure is proposed by using cross-shape rectangular cavity, of which wings are coupled with two cavities. Firstly, cavity placed between the input and output MIM waveguides. According to mutual interference bright dark modes, three Fano resonant peaks generated. Secondly, adding on left wing cross shaped one, five...

In this study, the numerical investigation of Al 2 O 3 -Water nanofluid mixed convection in a T-shaped lid-driven cavity presence thermal barrier with positioning at different positions is investigated by two-phase mixture model. Variable parameters study are aspect ratio (AR), volume fraction nanoparticles ( ? ), Richardson numbers (Ri), and placements cavity. The results indicated that increa...

The presence of a base cavity will degrade the bearing capacity tunnel bottom structures, and also have noteworthy impact on its fatigue performance. In order to study performance cumulative damage structure, series bending tests are conducted by reference heavy haul railway with cavity. Through tests, evolution characteristics structure obtained, then based expression S - N curves, non-linear ...

M-mode and cross-sectional echocardiography performed in a patient with acute pulmonary embolism showed a sausage shaped, mobile mass in the right ventricular cavity highly suggestive of a right ventricular myxoma. Emergency thoracotomy 24 hours later showed the right ventricle to be free of tumour but both pulmonary arteries contained embolised venous thrombi, one or more of which were thought...

Sturgeon is one of the most important species of the Caspian Sea aquatics. Unfortunately, this species faces the threat of extinction today. This makes specific studies on any type of sturgeons more important than before. Studies like histological studies, radiology, and sonography, all require a complete understanding of the anatomy of this fish. Since pilot studies showed some misconceptions ...