Water body measuring pH automated system based on quadcopter

The article discusses monitoring water bodies pH level automated system implementation using an unmanned aerial vehicle (UAV). Floating structure prototype for supporting UAV on water surface is described, taking into account creating a rotor thrust theory. Water hydrogen ions monitoring activity concept using a UAV is presented. Testing results water monitoring system in Lake Boyarskoye (Tomsk, Russia) are presented.

[rac-1,8-Bis(2-carbamoylethyl)-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane]copper(II) diacetate tetrahydrate: crystal structure and Hirshfeld surface analysis

The title CuII macrocyclic complex salt tetrahydrate, [Cu(C22H46N6O2)](C2H3O2)2·4H2O, sees the metal atom located on a centre of inversion and coordinated within a 4 + 2 (N4O2) tetragonally distorted coordination geometry; the N atoms are derived from the macrocycle and the O atoms from weakly associated [3.2048 (15) Å] acetate anions. Further stability to the three-ion aggregate is provided by intramolecular amine-N—H...O(carboxylate) hydrogen bonds. Hydrogen bonding is also prominent in the molecular packing with amide-N—H...O(amide) interactions, leading to eight-membered {...HNCO}2 synthons, amide-N—H...O(water), water-O—H...O(carboxylate) and water-O—H...O(water) hydrogen bonds featuring within the three-dimensional architecture. The calculated Hirshfeld surfaces for the individual components of the asymmetric unit differentiate the water molecules owing to their distinctive supramolecular association. For each of the anion and cation, H...H contacts predominate (50.7 and 65.2%, respectively) followed by H...O/O...H contacts (44.5 and 29.9%, respectively).

LEMON FLAVORED CLEANER TO PROTECT THE SOCIETY ON LARGE-SCALE SOCIAL RESTRICTIONS IN PADANG CITY, WEST SUMATERA PROVINCE

Background: The corona pandemic has wreaked havoc all across the world, especially in Indonesia. Hand washing with soap or hand sanitizer is one approach to help prevent the transmission of the corona virus. To aid in the prevention of the corona virus, a variety of hand sanitizers have been developed. Methodology: Therefore, hand sanitizers made from alcohol with lemon aroma have been produced and distributed to the community around the residence of the academic community of Andalas University. This hand sanitizer is made independently using ingredients such as alcohol, glycerin, water, hydrogen peroxide and lemon extract. Conclusion: The distributed hand sanitizer is highly accepted by the community because of the increasing need for personal hygiene due to the increasingly massive spread of the corona virus. It is hoped that this activity can be done continuously.