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All Journal Jurnal Natur Indonesia JURNAL FISIKA JFA (Jurnal Fisika dan Aplikasinya) Jurnal Fisika FLUX INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Pengabdian Pada Masyarakat Adi Widya : Jurnal Pengabdian Masyarakat Indonesian Journal of Chemistry Inovasi Fisika Indonesia (IFI)
Kusumandari, Kusumandari
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Universitas Sebelas Maret, Jl. Ir. Sutami 36A Kentingan Surakarta 57126
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics Social Sciences Other

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Hand Sanitizer dari Daun Mangga sebagai Upaya Menekan Penyebaran Pandemi Covid-19 di Wilayah Jebres dan Polokarto Maria Ulfa; Ida Setiarini; Ika Uswatun Hasanah; Kusumandari Kusumandari; Teguh Endah Saraswati
Jurnal Pengabdian Pada Masyarakat Vol 6 No 4 (2021)
Publisher : Universitas Mathla'ul Anwar Banten

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30653/002.202164.900

Abstract

HAND SANITIZER FROM MANGO LEAVES AS AN EFFORT TO SUPPRESS THE SPREAD OF THE COVID-19 PANDEMIC IN THE JEBRES AND POLOKARTO REGIONS. Covid-19 is an international pandemic that still has many victims. The UNS Campus area is a vulnerable area because apart from being public, there are also many residents who live around the campus which can be a medium for spreading the virus. The implementation of the health protocol, one of which is washing hands with running water or using a hand sanitizer, is one of the preventive measures to prevent the spread of the virus. Synthetic hand sanitizers have a lot of impact, especially for people who are sensitive to chemicals such as alcohol or synthetic disinfectants. On the other hand, the use of hand sanitizers has an important position to suppress the spread of the virus because it has the power to deactivate proteins from the Covid-19 spike section. Therefore, a breakthrough is needed to make natural hand sanitizers that are cheaper and have long-term sustainability. One of the natural ingredients that have a high antibacterial content is mango leaves. Various studies have stated that the tannin content of mango leaves is around 1.0 mg/g capable of deactivating bacteria and viruses. Unfortunately, so far, mango leaves are not used much except as fertilizer and more is wasted as garbage. In addition, the long pandemic period has caused the community not to have large reserves of hand sanitizers for their daily needs. Therefore, in this community service, training on the manufacture of hand sanitizers was carried out in the area around the UNS campus to provide skills to the community in procuring hand sanitizers independently from the plants around them as well as providing stock of natural hand sanitizers for people who are sensitive to chemicals.
Surface Morphology of Fe(III)-Porphyrin Thin Layers as Characterized by Atomic Force Microscopy Utari Utari; Kusumandari Kusumandari; Budi Purnama; Mudasir Mudasir; Kamsul Abraha
Indonesian Journal of Chemistry Vol 16, No 3 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (356.597 KB) | DOI: 10.22146/ijc.21136

Abstract

Surface morphology of Fe(III)–porphyrin thin layers was studied using atomic force microscopy. The thin layer samples used in these experiments were deposited by spin coating methods on indium–tin-oxide substrates at room temperature under atmospheric conditions. Variations of thin layer of Fe(III)-porphyrin were done by modifying the rotational speed and the concentration of the solution. The experimental results demonstrated that the Fe(III)–porphyrin layers were observed as discrete nanomolecular islands. Both the number of nano-islands and thickness of the layer increased significantly with increasing concentration. A layer thickness of 15 nm was obtained for low concentrations of 0.00153 M and become 25 nm for dense concentrations of 0.153 M. Conversely, the higher number of islands were deposited on the surface of the substrate at a lower rotational speed.
Pengaruh Variasi Rapat Arus pada Pembentukan Silikon Berpori di atas Permukaan Si (111) Tipe-P dengan Metode Anodisasi Elektrokimia Sehati, Sehati -; Wijayanti, Siti; Kusumandari, Kusumandari; Suryana, Risa
Jurnal Fisika Vol 11, No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v11i1.28396

Abstract

Silikon berpori (PSi) telah terbentuk di atas substrat Si (111) tipe-p menggunakan metode anodisasi elektrokimia. Permukaan silikon dianodisasi dalam larutan HF (40%) dan Etanol (96%) dengan perbandingan 1:1 pada rapat arus 70 mA/cm2, 80 mA/cm2, dan 90 mA/cm2 selama 6 menit. Plat platina sebagai katoda sedangkan silikon sebagai anoda dengan jarak 5 cm. Reflektansi PSi dikarakterisasi dengan Spektroskopi UV-Vis dan morfologi permukaan PSi dikarakterisasi dengan AFM. Kedalaman, lebar, dan kekasaran PSi meningkat dengan bertambahnya rapat arus. Hasil pengukuran pori menunjukkan nilai lebar pori (μm) lebih besar dari nilai kedalaman pori (nm). Hasil tersebut memperlihatkan bahwa proses etching arah horizontal lebih cepat dari arah vertikal. Pori yang terbentuk pada PSi diklasifikasikan jenis makropori karena lebar porinya berukuran (50nm). Reflektansi PSi menurun dengan meningkatnya rapat arus. Osilasi reflektansi terjadi  pada lapisan PSi karena adanya foton yang dipantulkan dengan sudut yang berbeda karena adanya perbedaan kedalaman pori yang terbentuk. Hasil karakterisasi AFM dan hasil karakterisasi reflektansi menunjukkan permukaan PSi yang terbentuk tidak homogen. Lapisan PSi yang terbentuk memiliki potensi sebagai lapisan anti-reflective.
IDENTIFIKASI REACTIVE OXYGEN SPECIES PADA PLASMA DIELECTRIC BARRIER DISCHARGE KONFIGURASI MESH-COPPER YANG DIRANGKAI SINGLE DAN DOUBLE MENGGUNAKAN OPTICAL EMISSION SPECTROSCOPY: Kata Kunci: Plasma DBD, spesies oksigen reaktif, spektroskopi optik emisi, rangkaian tunggal dan ganda Abdurrahman, Ahmad Faruq; Aprilia, Ayu; Zahar, Intan; Kusumandari, Kusumandari; Saraswati, Teguh Endah
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p13-20

Abstract

Penelitian ini bertujuan untuk mengidentifikasi reactive oxygen species (ROS) yang dihasilkan oleh plasma dielectric barrier discharge (DBD) pada konfigurasi rangkaian single dan double menggunakan Optical Emission Spectroscopy (OES). Variasi reaktor DBD digunakan untuk mengevaluasi spektrum emisi plasma. Hasil menunjukkan bahwa intensitas spektrum emisi pada rangkaian double secara umum lebih tinggi dibandingkan dengan Single. Produksi radikal OH dan O pada konfigurasi double lebih stabil, sementara emisi spektrum N₂ menunjukkan intensitas yang lebih besar dibandingkan dengan single. Stabilitas ini diuji lebih lanjut pada sampel dengan pH basa, yang menunjukkan penurunan pH menuju netral. Pengukuran suhu menunjukkan kestabilan selama proses berlangsung, menjadikan konfigurasi double DBD efektif untuk penelitian yang membutuhkan kestabilan suhu larutan. Hasil ini mengindikasikan bahwa rangkaian double dapat meningkatkan efisiensi produksi ROS dalam aplikasi plasma. Kata Kunci: Plasma DBD, spesies oksigen reaktif, spektroskopi optik emisi, rangkaian tunggal dan ganda Abstract This study aims to identify reactive oxygen species (ROS) generated by dielectric barrier discharge (DBD) plasma in single and double configurations using Optical Emission Spectroscopy (OES). Variations in DBD reactors were employed to evaluate the plasma emission spectra. The results showed that the emission intensity in the double configuration was generally higher than in the single configuration. The production of OH and O radicals in the double configuration was more stable, while the N₂ emission spectrum exhibited higher intensity compared to the single configuration. This stability was further tested on a sample with alkaline pH, which showed a decrease in pH toward neutrality. Temperature measurements demonstrated stability throughout the process, making the double DBD configuration effective for studies requiring solution temperature stability. These findings indicate that the double configuration can enhance ROS production efficiency in plasma applications. Keywords: DBD plasma, reactive oxygen species, optical emission spectroscopy, single and double configurations
Co-Authors Abdurrahman, Ahmad Faruq Agus Supriyanto Amalia Puji Winarni Antik Erlina Antik Erlina Anwar, Fuad Aprilia, Ayu Ari Handono Ramelan Budi Purnama Budi Purnama Fahru Nurosyid Friska Juliana Hutauruk Ida Setiarini Ika Uswatun Hasanah Kamsul Abraha Mohtar Yunianto Mohtar Yunianto, Mohtar Mudasir Mudasir Nor Shalina Saputri Pusaka, Semerdanta Risa Suryana Sehati, Sehati - Teguh Endah Saraswati Teguh Endah Saraswati Ulfa, Maria Utari Utari Utari Utari Wijayanti, Siti Yofentina Iriani Yofentina Iriani Zahar, Intan