A wide array of technological applications requires localized high-rate delivery of dissolved compounds (in particular, biological ones), which can be achieved by forcing the solutions or suspensions of such compounds through nano or microtubes and their bundled assemblies. Using a water-soluble compound, the fluorescent dye Rhodamine 610 chloride, frequently used as a model drug release compou...

How soft tubular aggregates interact with biomembranes is crucial for understanding the formation of membrane tubes connecting two eukaryotic cells, which are initially created from one cell and then connect with the other. On the other hand, recent experiments have shown that tubular polymersomes display different cellular internalization kinetics in their biomedical applications compared with...

The aim of this work is to demonstrate controlled flow through macroscopically long (approximately 1 cm) carbon tubes (0.5-1.8 microm in radius). A model, high-throughput, pressure-driven fluidic setup, which features a large number of parallel carbon tubes forming a bundle, is fabricated and tested. The carbon tubes are synthesized and self-assembled via co-electrospinning and subsequent carbo...

In flowering plant reproduction, pollen tube reception is the signaling system that results in pollen tube discharge, synergid degeneration, and successful delivery of male gametes (two sperm cells) to the site where they can fuse with female gametes (egg cell and central cell). Some molecules required for this complex and essential signaling exchange have been identified; however, fundamental ...

The external morphology and internal structure of the male sexual tube of the hermit crab Micropagurus acantholepis, a member of the family Paguridae from Australian waters, is described in detail using histological thick sectioning and scanning and transmission electron microscopy techniques. This is the first in-depth study of a sexual tube in the Paguroidea, a group where a remarkable number...

BACKGROUND Patients with respiratory failure are often unable to inhale powdered aerosol medications such as long-acting beta agonists and long-acting anticholinergics, which are important treatments for chronic obstructive pulmonary disease and asthma. OBJECTIVE To explore delivery of aerosolized powder medications via tracheostomy tube. METHODS We designed interfaces to connect the HandiH...

This study examined the attenuation characteristics of five FM system sound delivery options for a group of 10 adults and 15 children (5-13 years). Sound delivery options included a tube-fitting, lightweight headphones, a CROS earmold with tubing, a CROS earmold with a snap-ring, and a standard snap-ring earmold with a vent. Attenuation was defined as the difference between probe-tube microphon...

A list of advantages of this apparatus would be headed by the fact that it can be constructed from the simplest of laboratory equipment. Also, in contrast to the original design, no special tooling is required and no dimensions can be termed critical. The use of all flexible joints eliminates breakage, and the short overall length of the delivery tube makes delivery volumes more accurate and le...

Objective: The objective of the study was to determine the sensitivity and specificity of ultrasonography in the diagnosis of fetal neural tube defects in cases of polyhydramnios. Study Design: Descriptive type of study. Place and duration of study: It was conducted in Radiology department of Mother and Child Hospital (MCH) in collaboration with gynaecology department of Mother and Child hospit...

T he need to avoid prolonged starvation in patients is well recognized. More recently, it has been realized that without intraluminal fuels, intestinal integrity may deteriorate and allow translocation of gut bacteria. One means to combat nutrient deprivation and simultaneously to keep the local defense barrier of the intestine intact is tube feeding, i.e., enteral nutrition. This technique has...