Condensation of aromatic aldehydes with benzoyl acetone under specified conditions yieldedtwo series of polycarbonyl compounds in which the keto group is attached to olefinic linkage.Spectral and analytical data revealed the formation of an unsaturated triketone from pyridine-3-carbaldehyde and unsaturated diketone from furfural, salicylaldehyde and 2-hydroxynaphthaldehyde. Analytical, IR, 1H N...

In this investigation Rayleigh-Ritz variational method has been applied to determine the least natural frequency coefficient for the title problem. Classical plate theory assumptions have been used to calculate strain energy and kinetic energy. Coordinate functions are combination of polynomials which satisfy boundary conditions at the outer boundary and trigonometric terms. In the second part ...

A 30-year-old asymptomatic man with chronic hepatitis B was evaluated for an incidentally visualized intracardiac mass on abdominal ultrasonography. Two-dimensional (2D) transthoracic echocardiography (TTE) revealed a structurally normal heart except for the presence of homogeneously echodense, round, mobile mass (2.0×2.8 cm) within the left ventricular cavity (Fig. 1a, Video 1a). No flow abnor...

A 17-year old man was referred with Syncope. Echocardiography suggested a mass in the main pulmonary artery. A comprehensive cardiac magnetic resonance was performed. The mass was attached to the intima of the pulmonary artery. The diagnosis of thrombus was excluded. Finally, the mass was resected successfully and pathology confirmed the diagnosis (Fig. 1, Supplementary Videos S1 and S2). Suppl...

Figure 1 (A and B) Right ventricular mass (arrowed) attached to the tricuspid valve chordae apparatus on echocardiography, in apical four-chamber view, and modified parasternal right ventricular inflow view respectively; (C and D) repeat echocardiogram demonstrating enlargement of the original mass and an additional mass (longer arrow), modified parasternal right ventricular i mass on computeri...

A 32-year-old male patient was admitted to our clinic with complaints of exertional chest pain and shortness of breath. His blood pressure was 120/70 mmHg and his heart rate was 80 bpm. In the physical examination, Grade II/IV mid-diastolic murmur was noted at the cardiac apex with a harsh S1. His electrocardiogram was within normal limits. In transthoracic echocardiography, a mobile, heterogen...