Cu2+ removal from aqueous solution by Platanus orientalis leaf powders

An investigation steeredto ascertain the adsorption potential of fallen Platanus orientalis leaf powder (FPOLP) ascost-effective adsorbentto removeCu2+from an aqueous solution. The FPOLP was physically activated in two different forms (oxidation) and (N2) flowconditions. Batch operations for Cu2+ adsorption were performed to ascertain adsorption characteristics of FPOLP and activated samples. The results indicated that the optimum activation temperature and time were 500 oC and 180 min, respectively, while the best Cu2+ removal was achieved when the solution was controlled at pH 3 and the adsorbent dosage at 3 g/L.Additionally, an evaluation of the mechanism of adsorption fitted very well intopseudo-second-order. FTIR, scanning electron microscopy and BETmeasurements suggested that the new functional groups and the increased surface area related to the porous structure played a critical role in Cu2+ removal by the activated leaf powder. FPOLP has a great potential to remove Cu2+ in an aqueous solution

Molecular Dynamics Simulation of Sympathetic Crystallization of Molecular Ions

It is shown that the translational degrees of freedom of a large variety of molecules, from light diatomic to heavy organic ones, can be cooled sympathetically and brought to rest (crystallized) in a linear Paul trap. The method relies on endowing the molecules with an appropriate positive charge, storage in a linear radiofrequency trap, and sympathetic cooling. Two well--known atomic coolant species, ${}^9{\hbox{Be}}^+$ and ${}^{137}{\hbox{Ba}}^+$, are sufficient for cooling the molecular mass range from 2 to 20,000 amu. The large molecular charge required for simultaneous trapping of heavy molecules and of the coolant ions can easily be produced using electrospray ionization. Crystallized molecular ions offer vast opportunities for novel studies.Comment: Accepted for publication in Phys. Rev.

Pendidikan Kesehatan Deteksi Dini Tumbuh Kembang pada Anak di Paud Lab School UNPGRI Kediri

Perkembangan anak usia dini memegang peranan yang sangat penting dalam perkembangan seorang individu. Agar seorang anak memiliki perkembangan yang baik, maka perlu ada deteksi dini tumbuh kembang anak yang memiliki tujuan tercapainya optimalisasi perkembangan seorang anak. Sangat disayangkan masih sedikit orang tua yang memiliki kesadaran untuk melakukan deteksi dini tumbuh kembang anak ini. Melalui metode penyuluhan tentang deteksi dini tumbuh kembang anak orang tua diharapkan memiliki kesadaran dan keahlian dalam melakukan deteksi dini tumbuh kembang anak. Hasil dari kegiatan ini menunjukkan pertumbuhan status gizi ( 87,5 % ), lingkar kepala ( 100 % ), perkembangan menggunakan  KPSP dengan hasil ( 100 %), perkembangan mental emosional ( 77,8 % ), tes daya dengar ( 100% ), tes daya lihat ( 100 % ) bahwa pasca penyuluhan, orang tua  dan guru memiliki kesadaran yang lebih baik tentang pentingya melakukan deteksi dini tumbuh kembang anak sebagai upaya optimalisasi perkembangan anak

Structurally-related (−)-epicatechin metabolites in humans: assessment using de novo chemically synthesized authentic standards

Accumulating data suggest that diets rich in flavanols and procyanidins are beneficial for human health. In this context, there has been a great interest in elucidating the systemic levels and metabolic profiles at which these compounds occur in humans. While recent progress has been made, there still exist considerable differences and various disagreements with regard to the mammalian metabolites of these compounds, which in turn is largely a consequence of the lack of availability of authentic standards that would allow for the directed development and validation of expedient analytical methodologies. In the present study, we developed a method for the analysis of structurally-related flavanol metabolites using a wide range of authentic standards. Applying this method in the context of a human dietary intervention study using comprehensively characterized and standardized flavanol- and procyanidin-containing cocoa, we were able to identify the structurally-related (−)-epicatechin metabolites (SREM) postprandially extant in the systemic circulation of humans. Our results demonstrate that (−)-epicatechin-3′-β-D-glucuronide, (−)-epicatechin-3′-sulfate, and a 3′-O-methyl(−)-epicatechin-5/7-sulfate are the predominant SREM in humans, and further confirm the relevance of the stereochemical configuration in the context of flavanol metabolism. In addition, we also identified plausible causes for the previously reported discrepancies regarding flavanol metabolism, consisting to a significant extent of inter-laboratory differences in sample preparation (enzymatic treatment and sample conditioning for HPLC analysis) and detection systems. Thus, these findings may also aid in the establishment of consensus on this topic