The process of phage T4 DNA injection into the host cell was studied under a fluorescent microscope, using 4',6-diamidino-2-phenylindole as a DNA-specific fluorochrome. The phage DNA injection was observed when spheroplasts were infected with the artificially contracted phage particles having a protruding core. The DNA injection was mediated by the interaction of the core tip with the cytoplasm...

We study fracturelike flow instabilities that arise when water is injected into a Hele-Shaw cell filled with aqueous solutions of associating polymers. We explore various polymer architectures, molecular weights, and solution concentrations. Simultaneous measurements of the finger tip velocity and of the pressure at the injection point allow us to describe the dynamics of the finger in terms of...

A percutaneously placed central catheter (PICC) (Vygon premicath 28G, 1Fr, Germany) was inserted into the central venous system of a preterm infant born after 26 weeks of gestation for routine parenteral nutrition. A plain anteroposterior chest X-ray for verifying correct catheter placement erroneously showed the catheter tip to be located safely outside the heart silhouette [Panel A]. Injectio...

background: the technique of vertical dome division or tip defining, involves incising the lateral crura and vestibular skin at or lateral to the dome or tip defining point. the incision di-vides the lower lateral cartilage into a lateral segment and a medial segment, which are advanced anteriorly and sutured together to increase tip projection. the present study aimed at assessing a new vertic...

Propagation of a slip transient on fault with rate- and state-dependent friction resembles fracture whose near tip region is characterized by large departure the velocity strength from steady-state sliding. We develop solution to describe this unsteady dynamics, obtain energy G c , dissipated in overcoming strength-excursion away steady state, as function rupture v r . This opens possibility mo...

In this work, the Engine Combustion Network Spray G injector was mounted in Darmstadt optical-accessible engine to study phenomena typical of multi-hole, early direct-injection events spark-ignition engines characterized by tumble flow charge motion. Dedicated experimental measurements both in-cylinder spray morphology and velocities before after injection process were carried out assess adopte...