MOSFE-Capacitor Silicon Carbide-Based Hydrogen Gas Sensors.

The features of the wide band gap SiC semiconductor use in the capacitive MOSFE sensors' structure in terms of the hydrogen gas sensitivity effect, the response speed, and the measuring signals' optimal parameters are studied. Sensors in a high-temperature ceramic housing with the Me/TaO/SiC/4H-SiC structures and two types of gas-sensitive electrodes were made: Palladium and Platinum. The effectiveness of using Platinum as an alternative to Palladium in the MOSFE-Capacitor (MOSFEC) gas sensors' high-temperature design is evaluated.

Surgical Management of Aorto-Ventricular Tunnel. A Multicenter Study.

Aorto-ventricular tunnel (AoVT), a rare congenital anomaly, is a channel originating in the ascending aorta just above the sinotubular junction and leading to the cavity of the left ventricle (AoLVT), or, rarely, the right (AoRVT). This study reviews our collective 30-year experience with the surgical treatment of AoVT. Data were submitted by 15 participating centers on 42 patients who underwent correction of AoVT between 1987 and 2018.

Comparative Assessment of Excretion of Milk from Two Breast Pumps with Different Vacuum Strength and Duration.

Background: Breastfeeding is the best source of food for the newborn. In a situation wherein it is not possible to breastfeed a baby, it may be necessary to express milk from the mother's breast using a breast pump. To achieve lactation success before a baby's suckling can ensure the effective extraction of milk, breast pumps must meet specific biomechanical requirements.

The Mechanics of Breast Pumping: Compression Stimuli Increased Milk Ejection.

Background: The use of breast pumps with a compression component has shown their higher efficacy compared with vacuum pumps. However, the direct role of the compression stimulus is not sufficiently proven in the removal of milk from the main milk ducts of the breast. The aim of this study was to determine the contribution pulsating compression component of the breast pump has on total volume milk ejection by vacuum and compression stimuli.

Early Diagnosis and Repair of Double Saccular Aneurysms of the Aortic Arch Associated With Aortic Coarctation in an Infant With Loeys-Dietz Syndrome.

Multiple saccular aneurysms of the thoracic aorta in neonates and infants are exceedingly rare. An association of these aneurysms with Loeys-Dietz syndrome (LDS) in older age-groups is well known. This case report describes the diagnosis and subsequent successful repair of aortic coarctation associated with double saccular aneurysms of the thoracic aorta in patient with LDS during the first year of life.

Pathological postpartum breast engorgement: prediction, prevention, and resolution.

Background: Severe breast engorgement can cause substantial discomfort for mothers and interfere with an infant's ability to feed at the breast. This study explored the possibility of prediction of pathological postpartum breast engorgement in lactating women in relation to intense breast engorgement at the end of the luteal phase of the menstrual cycle and the possibility of prevention and resolution of postpartum breast engorgement with expression with a breast pump of colostrum before the appearance of transitional milk.

Subjects And Methods: The first group included 70 women with pathological postpartum breast engorgement.

Deep impact of the template on molecular weight, structure, and oxidation state of the formed polyaniline.

In this work we find that polyaniline (PANI), synthesized by aniline chemical polymerization at a surface of template polycarbonate (PC) particles, is significantly different in molecular weight, structural order, oxidation state, and conductivity from a neat PANI. Molecular weight of the PANI phase in the composite (Mw = 158,000) is 1.6 times higher than that of the neat PANI synthesized in the absence of the template particles.

The metamorphosis of heterometallic trinuclear antiferromagnetic complexes into nano-sized superparamagnetic spinels.

Thermal decomposition of the trinuclear heterometallic oxoacetates [Fe(2)M(μ(3)-O)(CH(3)COO)(6)(H(2)O)(3)] has been used as a single-precursor method for synthesis of the spinel-structured ternary oxides MFe(2)O(4) (M = Mn(II), Co(II), and Ni(II)). This facile process occurring at 320 °C results in the formation of nanocrystalline, (7-20 nm) highly pure stoichiometric ferrites in quantitative yield. The magnetic properties of these nanoparticulate ferrites were studied in the 10-300 K temperature range, revealing superparamagnetic behaviour for the Ni and Mn particles and ferromagnetic behavior for the Co ones at room temperature.

Surgical correction of tetralogy of Fallot with unilateral absence of pulmonary artery.

Background: Tetralogy of Fallot with unilateral absence of the pulmonary artery is a rare congenital heart defect that still represents a surgical challenge. The purpose of this study is to summarize our experience of surgical treatment of this complex lesion.

Methods: From 1983 to 2003, 27 patients with tetralogy of Fallot and unilateral absence of the left (n = 25) or right (n = 2) pulmonary artery underwent different surgical interventions.

The arterial switch operation in Europe for transposition of the great arteries: a multi-institutional study from the European Congenital Heart Surgeons Association.

Objectives: This study analyzes the results of the arterial switch operation for transposition of the great arteries in member institutions of the European Congenital Heart Surgeons Association.

Methods: The records of 613 patients who underwent primary arterial switch operations in each of 19 participating institutions in the period from January 1998 through December 2000 were reviewed retrospectively.

Results: A ventricular septal defect was present in 186 (30%) patients.