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In this work, a colorimetric analysis of adulterated tuna samples is carried out using both a spectroradiometer and a smartphone as capture devices. Yellowfin tuna (Thunnus albacares) slices were treated with nitrate and nitrite salts, as well as with two different vegetable extracts (beetroot and radish), and the resulting NO

A microporous material made of cyclodextrin units covalently immobilized into a silica network has found an innovative bioanalytical application in the sample clean-up and simultaneous isolation of three synthetic cannabinoids (ADB-CHMICA, MMB-CHMICA, and MDMB-CHMCZCA) from human oral fluid through solid-phase extraction. The subsequent quantitation is carried out using liquid chromatography coupled to fluorescence detection. The optimized experimental procedure gives recoveries ranging from 76% to 96% in oral fluid samples spiked with the studied cannabinoids at the µg L-1 level. High selectivity is obtained through the extraction procedure due to the presence of cyclodextrin in the silica network of the solid phase and thanks to the use of fluorescence detection in the separation technique. It is precisely the type of detection chosen that also gives the developed method a great sensitivity. The limits of detection of the proposed analytical method range from 0.11 to 0.73 µg kg−1 and high repeatability is observed, with variations lower than 6%. The obtained results demonstrate the versatility and high potential of cyclodextrin-silica porous materials for the sorption of the studied substances, contributing in a novel way to the proper determination of third-generation synthetic cannabinoids in biological samples.

The presence of a right-atrium thrombus is considered as an unusual form of thromboembolic disease, with a prevalence of 10-18%. Most of them are located in the right-atria. Its mortality is about 45%. Echocardiography is very important to detect them and to control the effectiveness of the treatment, which can be either conservative or surgical. We present a case of a man to show the importance of echocardiography in this pathological diagnosis, what is essential for a right-treatment.