Microencapsulation of ellagic acid from pomegranate husk and karaya gum by spray drying

Objective: The aim of this study was to obtain and characterize microcapsules with Ellagic Acid (EA) from pomegranate as core material and Karaya Gum (KG) as wall material. Methods: EA was obtained from dry pomegranate peel powder via methanolysis and quantified by HPLC. Microcapsules were obtained preparing a dispersion containing KG and EA in phosphate buffer pH 8. The dispersion was processed in a spray dryer under specific conditions (inlet temperature at 150 °C, feed flow at 30% and aspirator at 100 %) for obtaining of microcapsules. Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were used for characterization. Results: Obtained material contains 98.03±2.82 mg EA/g of pomegranate peel. FTIR showed that there were changes in the molecular structure of microcapsules referred to raw materials. SEM confirmed that particles obtained had micron-size (1-5 µm). DSC analysis showed that raw materials had glass transition temperatures of 79.58 and 83.41 °C and for microcapsules the value was67.25 °C. Conclusion: Methanolysis is a viable technique for the obtaining of EA from the peel of pomegranate. KG shows good potential for be used as wall material for EA microencapsulation

Bats and the Camazotz: Correcting a Century of Mistaken Identity.

At the end of the nineteenth century, Eduard Seler identified the bats depicted on a ceramic vessel excavated by Erwin Dieseldorff at the site of Chama, Guatemala, as the camazotz, or death bat, from the K’iche’ Maya myth, the Popol Vuh. The attribution was never critically reviewed. Nevertheless, it became so deeply entrenched that virtually every image of a Maya bat is identified as a camazotz. We have located no ancient depictions of the Hero Twins in the chamber of the camazotz, which calls into question the salience of this scene for the ancient Maya. In iconography and ethnohistory, multiple figures with bat-like characteristics exist, both bats and anthropomorphic bat-men. Clearly, the situation is complex. We argue that bats appear principally in four roles. The first is as an emblematic symbol representing some group. The bat played a second role as a messenger, often paired on vessels with a bird. A third category relates to pollination, vegetation, and fertility, and here the bat may be paired with the hummingbird. The last and largest category is wahy beings, which most epigraphers now think were bestial forms of personified diseases. Included here are the many vessels depicting the fire-breathing bat, including Dieseldorff\u27s Chama vessel. We argue that the identification with the camazotz should be dropped altogether and that the associations proposed by Seler need to be rethought