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All Journal Indonesian Journal of Chemical Studies (Indones. J. Chem. Stud.) JPM-AKA
Ananda, Dea Dwi
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Chemistry Social Sciences

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Brief Virtual Observation Revealed the Possibility of Trade in Organophosphate-based Pesticides through E-commerce Stiawan, Elva; Nurhalimah, Siti; Ananda, Dea Dwi; MS, M. Adrian Rezki Anggara; Tayon, Felix
Jurnal Pengabdian Masyarakat AKA Vol 4, No 1 (2024): Juni 2024
Publisher : Politeknik AKA Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55075/jpm-aka.v4i1.225

Abstract

Reactive organophosphates (OPs) could be utilized as deadly pesticides due to their nerve agent properties for several organisms. Although the utilization of these compounds has been strictly regulated, monitoring its trading activities, particularly through e-commerce, could be quite challenging. There is a lack of information on whether the pesticide products containing OPs or slightly featured with similar phosphates groups exist or are un-existed in the online stores in Indonesia. This community service aims to briefly report the possibility of trade in phosphorous-based pesticides through online stores in Indonesia. We demonstrated virtual observation to obtain the list of phosphorous-based pesticides from several e-commerce in Indonesia. We detected 24 pesticides displayed on some popular e-commerce with particular phosphate groups in the active substance, i.e., Acephate, Chlorpyrifos, Dimethoate, Diazinon, Profenofos, and Triazofos. The finding could provide insight for those online stores to establish particular rules to monitor and control trading activities of agrochemicals that could be illegally used or further processed for any activities related to Chemical, Biological, Radiological, and Nuclear and Explosives (CBRN-E) threats.
Reflection Loss Improvement by Cerium Addition in Chitosan-Hydroxyapatite Film as Stealth Drone Candidate Putri, Riyanti; Prasojo, Agus Eko; Lazuardy, Ardyan; Anitasari, Reza; Salsabila, Fidela Aurellia; Sasongko, Nugroho Adi; Apriliyanto, Yusuf Bramastya; Hasibuan, Anggi Khairina Hanum; Ananda, Dea Dwi
Indonesian Journal of Chemical Studies Vol. 4 No. 1 (2025): Indones. J. Chem. Stud., June 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ijcs.v4i1.53

Abstract

Radar is a detection and tracking technology commonly applied to monitor environmental conditions. Its ever-growing capabilities pose a serious challenge to military operations because they increase the risk of being detected by the enemy. On the other hand, unmanned aircraft (drones) are increasingly widespread in gathering information. However, the effectiveness of this technology can be reduced due to exposure to radar waves that allow detection. Therefore, developing coating materials that can absorb radar waves is an urgent need to increase the effectiveness of military equipment. The composites developed were derived from chitosan obtained from crustacean waste, hydroxyapatite from eggshell waste, and the rare earth metal cerium obtained from Lapindo Mud. Composites containing cerium metal (Ce) have higher radar signal absorption capabilities than samples without Ce, as evidenced by VNA measurements showing increased absorbance in the 100 MHz - 8.5 GHz frequency range. SEM tests indicate that cerium particles increase the density and homogeneity of the pore structure, with a size range of 17–24 µm. FTIR characterization revealed that Ce was physically bound to the chitosan-HAp composite. Mechanically, the composite with Ce had a maximum tensile stress of 9.512 MPa and a strain of 9.512%, while without the addition of Ce, a stress of 9.529 MPa and a strain of 25.512% was obtained. These findings indicate that integrating rare earth metals in chitosan-HAp composites can improve the material's capability to absorb radar waves, thus having broad prospects for applications in defence technology.
Co-Authors ANGGI KHAIRINA HANUM HASIBUAN Anitasari, Reza Elva Stiawan Lazuardy, Ardyan MS, M. Adrian Rezki Anggara Nugroho Sasongko Jati, Nugroho Sasongko Prasojo, Agus Eko Putri, Riyanti Salsabila, Fidela Aurellia Siti Nurhalimah Tayon, Felix Yusuf Bramastya Apriliyanto