Evaluation of automated tool for two-dimensional fetal biometry.

Objective: To evaluate whether an automated tool can recognize a structure of interest and measure fetal head circumference (HC), abdominal circumference (AC) and femur length (FL) on frozen two-dimensional ultrasound images.

Methods: Ultrasound examinations were performed in 100 singleton pregnancies between 20 and 40 weeks of gestation, ensuring an even distribution throughout gestational age. In each pregnancy, three standard biometric variables (HC, AC, FL) were measured each in three different images obtained for this purpose (i.

Evaluation of stroke volume and ventricular mass in a fetal heart model: a novel four-dimensional echocardiographic analysis.

Aims: This study aimed to assess the feasibility and accuracy of nongated four-dimensional echocardiography (4DE) for determining left ventricular (LV) stroke volume (SV) and mass in a fetal heart-sized LV model.

Methods: A balloon was inserted into the LV of 20 fresh rabbit hearts and attached to a calibrated pulsatile pump. Ten hearts retaining the right ventricle were imaged in Group A.

Methods and techniques for the selective extraction and recovery of oxoanions.

An important goal in environmental chemistry is the extraction of metals that are toxic or radioactive from soils and waters. For many such metals, the problem is solved by designing compounds with coordination sites that are specific for that particular metal. For cases such as oxoanions, however, where the inorganic center is already fully coordinated by oxygens, different strategies need to be used.

Calixarenes Derivatized with Sulfur-Containing Functionalities as Selective Extractants for Heavy and Precious Metal Ions.

The calix[4]arenes 5,11,17,23-tert-butyl-25,26,27,28-(2-methylthioethoxy)calix[4]arene, 25,26,27,28-(2-methylthioethoxy)calix[4]arene, and 5,11,17,23-tert-butyl-25,26,27,28-(2-(2-thiophenecarboxy)ethoxy)calix[4]arene have been prepared. The structure of 25,26,27,28-(2-methylthioethoxy)calix[4]arene has been verified by X-ray crystallography. The crystals with the empirical formula C(40)H(48)O(4)S(4) are monoclinic C2/c with a = 20.

Biodistribution of the lipophilic complexes 59Fe(RsalH2)3tach (R = H, NO2 and OMe) and 68Ga(NO2salH2)3tach.

A series of highly lipophilic comploffs 59Fe(RsalH2)3tach (R = H, NO2, OMe) and 68Ga(NO2salH2)3tach have been evaluated in vivo as potentially clinically useful agents.