Search results for "Ultra"

New Insights into the Anterior Complex

2020

<b><i>Objective:</i></b> To introduce visualization of the germinal matrix (GM), external angle of the frontal horn, and periventricular white matter while evaluating the anterior complex (AC) during basic ultrasound assessment of the fetal brain. <b><i>Case Presentations:</i></b> This is a retrospective observational study of healthy women with singleton pregnancies, with no increased risk of fetal central nervous system anomalies, attending routine ultrasound screening at 20–32 weeks’ gestation. Seventeen cases are presented in which an abnormal aspect of the GM or external angle of the frontal horn or periventricular white matter on AC eval…

IL TRATTAMENTO PERCUTANEO ENDOVASCOLARE DEL VARICOCELE MASCHILE: C'E' ANCORA SPAZIO PER L'INNOVAZIONE?

A versatile ultrasound system for in vitro experiments

2015

Objective One of the most difficult tasks to achieve with the available instrumentations used to study the interaction between ultrasound (US) and cellular model systems is to design an experiment, where only the effects of one physical parameter at a time is evaluated, while all the others are kept constant. The set-ups are usually custom-made, often by means of clinical instrument intended for a different therapeutic purpose. Furthermore, the results are not strictly comparable with others obtained with techniques considered standard in molecular and cellular biology at this time, because there is the need to use non-standard devices to contain biological samples. Sterility, as well as te…

Intramuscular migration of calcium deposits into the deltoid muscle: two cases of a rare complication of rotator cuff calcific tendinopathy

2023

Rotator cuff calcific tendinopathy is a common non-traumatic shoulder pain condition that occurs predominantly in the supraspinatus tendon. Ultrasound-guided percutaneous irrigation of calcific tendinopathy (US-PICT) is a valid treatment in the resorptive phase. A complication of calcific tendinopathy is migration of calcium deposits outside the tendon. The most common site of migration is the subacromialsubdeltoid bursa (SASD). Another, but not frequent, type of migration is the intramuscular migration which mostly affects the supraspinatus, the infraspinatus and the biceps brachii muscles. This paper reports two cases of migration of calcification from the supraspinatus tendon to the delt…

Ultrasounds and ionic liquids assisted methanolysis of polycarbonate: The route towards a more sustainable recycling

Ultrasounds effects on osteosarcoma cell line (MG63) with double frequency and direction of sonication

2019

Ultrastructure

1973

Real-time non-contact ultrasonic detection of surface defects on objects moving at high speed

2012

Il rilievo di difetti superficiali durante le ispezioni periodiche è importante poiché in genere le sollecitazioni sono maggiori in superficie e possono accelerare la crescita delle discontinuità. I difetti superficiali possono essere rilevati utilizzando alcuni metodi tradizionali di controllo non distruttivo, quali correnti indotte, liquidi penetranti, polveri magnetiche ed ultrasuoni. Alcuni tra questi metodi possono essere usati solo in condizioni statiche; gli altri presentano delle limitazioni per l’ispezione dinamica. I progressi recenti nel campo dei sensori ultrasonori senza contatto ci hanno permesso di sviluppare un sistema semplice per l’ispezione in tempo reale di corpi in movi…

On the Deactivation Mechanisms of Adenine–Thymine Base Pair

2012

In this contribution, the multiconfigurational second-order perturbation theory method based on a complete active space reference wave function (CASSCF/CASPT2) is applied to study all possible single and double proton/hydrogen transfers between the nucleobases in the adenine-thymine (AT) base pair, analyzing the role of excited states with different nature [localized (LE) and charge transfer (CT)], and considering concerted as well as step-wise mechanisms. According to the findings, once the lowest excited states, localized in adenine, are populated during UV irradiation of the Watson-Crick base pair, the proton transfer in the N-O bridge does not require high energy in order to populate a …

Remarks on the environmental adaptation of man.

1971

In this paper the geographical variability of some morphological, physiological and serological traits of man is discussed with respect to the question, how far this variability can be considered as the result of selective adaptation processes. Though there is already some evidence supporting such an assumption, much more detailed and exactly planned research is necessary to clear the indubitable relations between the distribution patterns of anthropological traits and the various environmental conditions of human biotops. Particularly much more work is required to understand the causative mechanisms on which these relations are based.