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Perbandingan Karakteristik Sel Superkapasitor Berbahan Komposit GO/TiO2 yang Dibuat Melalui Proses Termal Dengan dan Tanpa Autoclave Saajidah Fathinal Haq; Nur Khanifah; Fitrilawati -; Norman Syakir; I Made Joni
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 6, No 2 (2022)
Publisher : Universitas Padjadjaran

Pada penelitian ini dibuat komposit rGO/TiO2 menggunakan metode termal dengan menggunakan autoclave dan tanpa autoclave. Komposit rGO/TiO2 tanpa autoclave dibuat dari dispersi GO dan dispersi TiO2 dengan rasio massa 3:2 melalui pemanasan pada 50°C selama 5 jam, sedangkan komposit rGO/TiO2 dengan autoclave dibuat dari dispersi GO dan dispersi TiO2 dengan rasio massa 3:2 melalui pemanasan pada 120oC selama 24 jam. Untuk elektroda superkapasitor dibuat lapisan komposit rGO/TiO2 dibuat pada pelat nickel (Ni) dengan menggunakan teknik UV Oven spraying. Model superkapasitor dibuat dalam bentuk sel simetris yang terdiri dari sepasang lapisan komposit rGO/TiO2 pada pelat Ni sebagai elektroda dan larutan 1M KOH sebagai elektrolit. Superkapasitor yang menggunakan elektroda komposit rGO/TiO2 memiliki performa yang lebih tinggi dibandingkan dengan superkapasitor yang menggunakan elektroda GO dan TiO2 murni. Superkapasitor yang menggunakan elektroda komposit rGO/TiO2 yang dibuat menggunakan autoclaves memiliki performa lebih tinggi daripada superkapasitor yang menggunakan elektroda komposit rGO/TiO2 yang dibuat tanpa autoclaves, dengan nilai kapasitansi spesifik, energi spesifik, dan daya spesifik masing-masing adalah 8,21 F/g, 1,14 Wh/kg, dan 164,1 Watt/kg.

Pengaruh Subletal Nanosuspensi Lantana camara Linnaeus dalam Menghambat Perkembangan dan Lolos Hidup Larva Croccidolomia pavonana Fabricius (Lepidoptera: Crambidae) Melanie, Melanie; Hermawan, Wawan; Rustama, Mia Miranti; Malini, Desak Made; Husodo, Teguh; Panatarani, Camellia; Joni, I Made
Agrikultura Vol 34, No 1 (2023): April, 2023
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/agrikultura.v34i1.43164

Aplikasi insektisida sintetik pada tanaman kubis seringkali mendapatkan kendala, salah satunya karena insektisida tidak dapat merekat dengan baik pada permukaan daun kubis yang mengandung lapisan lilin. Penelitian ini dilakukan dengan tujuan untuk mendapatkan formulasi nanosuspensi bioinsektisida yang dapat digunakan untuk mengendalikan larva Crocidolomia pavonana pada tanaman kubis. Nanosuspensi Fraksi Etil Asetat (FEA) daun Lantana camara telah diketahui berpotensi sebagai antifidan terhadap larva C. pavonana. Formula nanosuspensi dengan rasio surfaktan (SOR 9, 11, 12, dan 14) di formulasikan dalam media air menggunakan metode emulsi sederhana energi rendah ditambah dengan interferensi ultrasonikasi. Uji bioassay dilakukan untuk menentukan kategori toksisitas dan bioaktivitas nanosuspensi pada konsentrasi subletal terhadap perkembangan larva hingga pupa C. pavonana. Formula nanosuspensi FEA L. camara dengan variasi SOR 11 (D= 76,6 nm; PI= 0,589; Z = -4,4 mV) diketahui terdispersi dalam media air yang terbaik diantara variasi komposisi formula lainnya. Hasil uji toksisitas menunjukkan bahwa efek subletal nanosuspensi (SOR 11) LC50 48 jam (2.948 ppm) dan LC50 72 jam (3.897 ppm) dikategorikan sebagai toksikan sedang, dan secara nyata menghambat perkembangan dan lolos hidup larva C. pavonana instar 3 menuju pre-pupa (P<0,05), dengan rata-rata waktu perkembangan terlama 6,5 hari (SOR 11), dan persentase lolos hidup terendah instar 4 menuju fase pupa pada perlakuan SOR 11 (13,33%). Pupa diketahui tidak mampu berkembang ke tahap imago pada semua variasi SOR, yang diindikasikan melalui cacat dan kematian pupa. Dengan demikian, toksisitas nanosuspensi FEA L. camara yang rendah menjadikannya formula yang efektif dan berpotensi utuk mencegah resistensi C. pavonana.

KARAKTERISTIK LAPISAN KOMPOSIT rGO/CeO2 SEBAGAI ELEKTRODA PADA MODEL SUPERKAPASITOR SIMETRIS DENGAN ELEKTROLIT POTASIUM KLORIDA THALLAH, SALSA INDAH MAULIA; FITRILAWATI, F; JONI, I MADE; SYAKIR, NORMAN
Jurnal Material dan Energi Indonesia Vol 12, No 02 (2022)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

AbstrakSuperkapasitor merupakan komponen penyimpanan energi yang memiliki rapat daya dan rapat energi lebih baik dibandingkan dengan baterai dan kapasitor konvensional. Pada penelitian ini diuji karakteristik lapisan komposit reduced graphene oxide/cerium oxide (rGO/CeO2) sebagai elektoda pada model superkapasitor simetris. Komposit rGO/CeO2 dibuat dari dispersi graphene dioxide (GO) dalam air dan serbuk CeO2 dengan perbandingan 60:40 yang dikenakan proses hidrotermal pada suhu 150°C selama 12 jam. Untuk elektroda superkapasitor, lapisan komposit rGO/CeO2 dideposisi dengan metode spray coating di atas pelat nikel (Ni). Superkapasitor dibuat dengan model sel simetris dari sepasang elektroda lapisan rGO/CeO2 dan 1M KCl sebagai elektrolit. Dari karakterisasi cyclic voltammetry (CV) didapatkan nilai kapasitansi spesifik, energi spesifik, daya spesifik dari model superkapasitor yang dibuat masing-masing adalah 160,59 F/g, 22,30 Wh/kg, 3857,94 W/kg yang diukur pada scan rate 10 mV/s. Dari Ragone plot dapat disimpulkan bahwa sel superkapasitor yang menggunakan elektroda rGO/CeO2 memiliki karakteristik superkapasitor dan memiliki performa yang baik.Kata kunci: proses hidrotermal, komposit rGO/CeO2, superkapasitor AbstractSupercapacitors are energy storage components that have better power density and energy density compared to conventional batteries and capacitors. In this research, the characteristics of the reduced graphene oxide/cerium oxide (rGO/CeO2) composite layer as an electode were tested in a symmetrical supercapacitor model. The rGO/CeO2 composite was prepared from dispersion of graphene oxide (GO) in water and CeO2 powder with a ratio of 60:40 in a hydrothermal process at 150°C for 12 hours. As the supercapacitor electrodes, a composite layer of rGO/CeO2 was deposited using the spray coating method on a nickel (Ni) plate. The supercapacitor was made with a symmetrical cell model from a pair of layered electrodes of rGO/CeO2 and 1M KCl as the electrolyte. From the results of the cyclic voltammetry (CV) characterization, the values for specific capacitance, specific energy, specific power of 160.59 F/g, 22.30 Wh/kg, 3857.94 W/kg, which occurred at a scan rate of 10 mV/ s. From the results of the ragone plot, it can be concluded that supercapacitor cells with rGO/CeO2 electrodes have supercapacitor characteristics and have good performance.keywords: Hydrothermal process, rGO/CeO2 composite, supercapacitor

Promotion of Crypt-like Structures in Intestinal Organoid Development through the Addition of Graphene Oxide in Cell-based Assays Sulaksono, Haura Labibah Salsabil; Kamilah, Mutiara Mila; Faridah, Lia; Joni, I Made; Watanabe, Kozo; Ekawardhani, Savira
Global Medical & Health Communication (GMHC) Vol 12, No 3 (2024)
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/gmhc.v12i3.13386

The intestinal organoid represents a miniature organ that can mimic functional physiology and pathology. However, there are several challenges to developing the organoid system, such as the limited survival of cells. Based on theory, matrix addition is a factor that can support survival in cells. As a result, graphene oxide (GO) addition is used in this study. As an artificial matrix, GO has been successfully shown to encourage good cell behavior and is well known for having good biocompatibility. Herein, we fabricate GO characterized with FT-IR and PSA. Crypt-like structures (CLS) are isolated from small intestinal mice in GO addition as a matrix. The gene expression and cell viability of CLS are investigated. RT-PCR examined the gene expression in CLS, while cell viability of CLS was carried out using the staining method. This study was conducted at FiNder U-CoE and Parasitology Laboratory of HSE Universitas Padjadjaran Bandung during February and December 2023. Our results show that Vil-1 as an identity for cells in the intestinal epithelium has been expressed in CLS primary significantly higher than intestinal tissue (p=0.01). However, identifying Lgr5 in CSL isolates is tricky. Thes in the crypt may be limited. Besides that, cell viability of CLS with GO addition can be maintained for four days. The GO addition as a matrix may provide support to maintain CLS. These findings are promising as cell-based assays for developing organoid models.

FLOWABILITY OF NANOPARTICLES OF CALCIUM HYDROXIDE PALIMANAN IN DENTINAL TUBULE Sidiqa, Atia Nurul; Muqdas, Faza Annisa; Artilia, Ira; Zakaria, Myrna Nurlatifah; Joni, I Made; Maskoen, Ani Melani
Odonto : Dental Journal Vol 11, No 2 (2024): December 2024
Publisher : Faculty of Dentistry, Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/odj.11.2.282-289

Background: Intracanal medicaments Ca(OH)₂ must have the ability to contact directly with bacteria adhering to the dentinal tubules. However, the narrow and complex shape of the root canal makes it difficult for Ca(OH)2 to penetrate the root canal apically. This research aimed to assess the flowability of nanoparticle Ca(OH)₂ Palimanan by quantifying the penetration of the coronal, middle, and apical thirds of the root canal.Methods: This research comprised two distinct groups: one group included nanoparticles of Ca(OH)₂ Palimanan, while the other consisted of conventional Ca(OH)₂. The paste was then applied to standardized root canals (n=3 per group) with 5 times measurements for each sample. All samples were then incubated at 37oC, 100% humidity. The flowability of the root canals was measured using scanning electron microscopy (SEM) on day 14. The data was analyzed using ANOVA and a post-hoc t-test, with a significance level of p<0.05.Results: The use of Ca(OH)₂ Palimanan has been found to be more effective in reaching deeper into the dentinal tubules of the root canal, particularly in the coronal, middle, and apical areas, compared to traditional Ca(OH)₂. This occurs because the particle size of Ca(OH)₂ Palimanan is smaller with a more rounded shape than conventional Ca(OH)₂ so that it to flow into narrow and complex areas, especially in the apical root canals.Conclusion: Nanoparticle Ca(OH)₂ Palimanan flow deeper than conventional Ca(OH)₂

FLOWABILITY OF NANOPARTICLES OF CALCIUM HYDROXIDE PALIMANAN IN DENTINAL TUBULE Sidiqa, Atia Nurul; Muqdas, Faza Annisa; Artilia, Ira; Zakaria, Myrna Nurlatifah; Joni, I Made; Maskoen, Ani Melani
Odonto : Dental Journal Vol 11, No 2 (2024): December 2024
Publisher : Faculty of Dentistry, Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/odj.11.2.282-289

Background: Intracanal medicaments Ca(OH)₂ must have the ability to contact directly with bacteria adhering to the dentinal tubules. However, the narrow and complex shape of the root canal makes it difficult for Ca(OH)2 to penetrate the root canal apically. This research aimed to assess the flowability of nanoparticle Ca(OH)₂ Palimanan by quantifying the penetration of the coronal, middle, and apical thirds of the root canal.Methods: This research comprised two distinct groups: one group included nanoparticles of Ca(OH)₂ Palimanan, while the other consisted of conventional Ca(OH)₂. The paste was then applied to standardized root canals (n=3 per group) with 5 times measurements for each sample. All samples were then incubated at 37oC, 100% humidity. The flowability of the root canals was measured using scanning electron microscopy (SEM) on day 14. The data was analyzed using ANOVA and a post-hoc t-test, with a significance level of p<0.05.Results: The use of Ca(OH)₂ Palimanan has been found to be more effective in reaching deeper into the dentinal tubules of the root canal, particularly in the coronal, middle, and apical areas, compared to traditional Ca(OH)₂. This occurs because the particle size of Ca(OH)₂ Palimanan is smaller with a more rounded shape than conventional Ca(OH)₂ so that it to flow into narrow and complex areas, especially in the apical root canals.Conclusion: Nanoparticle Ca(OH)₂ Palimanan flow deeper than conventional Ca(OH)₂

PENGENALAN PEMANFAATAN TONGKOL JAGUNG SEBAGAI BAHAN DASAR BIODEGRADABLE PLASTIC DI DESA BOJONG, KABUPATEN BANDUNG, JAWA BARAT Panatarani, Camellia; Putri, Amaris Evania; Khalistia, Sarah Firka; Faizal, Ferry; Maulana, Dwindra Wilham; Joni, I Made
DHARMAKARYA: Jurnal Aplikasi Ipteks untuk Masyarakat Vol 13, No 3 (2024): September : 2024
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/dharmakarya.v13i3.43261

Sampah plastik konvensional menjadi suatu permasalahan karena sulit terurai. Penimbunan sampah plastik dapat menyebabkan pencemaran lingkungan serta berdampak pada kesehatan masyarakat maupun ternak sekitar. Salah satu solusi dalam menghadapi persoalan tersebut adalah melalui biodegradable plastic yang relatif lebih mudah terurai dibanding plastik konvensional. Biodegradable plastic dapat terbuat dari limbah pertanian yang memiliki kadar selulosa tinggi. Bonggol atau tongkol jagung merupakan limbah lignoselulosik, yaitu limbah yang mengandung selulosa, hemiselulosa, dan lignin. Desa Bojong memiliki komoditas utama yang ditanam dan diusahakan oleh warga setempat berupa jagung yang pemanfaatan (khususnya) pada limbah tongkol jagung masih terdapat keterbatasan. Jagung yang ditanam di Desa Bojong diperjualkan dalam bentuk mentah dan belum diolah. Terdapatnya persoalan terkait sampah plastik dan minimnya pemanfaatan tongkol jagung, menjadikan perlunya dilakukan kegiatan “Sosialisasi Biodegradable Plastic Berbahan Dasar Tongkol Jagung” kepada para petani jagung di Desa Bojong. Kegiatan dilakukan dengan metode dalam bentuk penyuluhan yang keseluruhan kegiatan meliputi tahapan persiapan, pelaksanaan, dan tindak lanjut. Kegiatan ini dilaksanakan untuk meningkatkan kesadaran masyarakat mengenai isu limbah plastik konvensional yang berdampak bagi lingkungan dan kesehatan makhluk hidup serta pemanfaatan keunggulan pertanian Desa Bojong itu sendiri. Hasil dari kegiatan ini adalah meningkatnya pengetahuan masyarakat, khususnya para petani jagung setempat mengenai pengolahan biodegradable plastic berbahan dasar tongkol jagung.Conventional plastic waste becomes a problem as it is difficult to decompose. The hoarding of plastic waste can cause environmental pollution and have an impact on the health of the people and surrounding livestock. One of the solutions in overcoming that issue is through biodegradable plastic which is relatively easier to decompose than conventional plastic. Biodegradable plastic can be made from agricultural waste that has a high cellulose content. Corn cobs are lignocellulosic waste, namely waste containing cellulose, hemicellulose, and lignin. Bojong Village has the main commodity in the form of corn, which utilization (especially) for corn corbs waste is still limited. Corn produced in Bojong Village is sold in raw and unprocessed form. From those issues related to plastic waste and the lack of use of corn cobs, conclude it necessary to carry out the "Socialization of Biodegradable Plastic Made of Corn Cobs" to the corn farmers in Bojong Village. This project is carried out using a method in the form of counseling, the whole activity includes the stages of preparation, implementation, and follow-up. This activity was carried out to increase public awareness about the issue of conventional plastic waste that has an impact on the environment and the health of living things as well as to take optimalize of the advantages of Bojong Village itself. The result of this activity is the increase of public knowledge, especially local corn farmers regarding the process of biodegradable plastic made from corn cobs.

Clinical Symptom Analysis of Characteristic Bacteria Causing Subclinical Mastitis in Dairy Cow at Pengalengan, Bandung Regency Waskita, Pranyata Tangguh; Balia, Roostita L; Joni, I Made; Putranto, Wendry Setiyadi
Journal of Social Research Vol. 3 No. 5 (2024): Journal of Social Research
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar

Mastitis is an udder infection that affects many dairy farms in Indonesia. Many causes can be identified to see the etiology. This study was conducted to determine the bacteria that causes mastitis and attacks dairy farms in the Bandung Regency Region. Based on the results of isolation and identification by examination of Blood Agar Media (BAP), Catalase Test, Coagulase Test, Gram staining, and DNAse Test of milk samples taken from three farm areas in Warnasari and Babakan Kiara in Pengalengan District and Citawa District Kertasari District, the bacteria that cause mastitis are Staphylococcus aureus COPS and CONS, Staphylococcus pyogenes, Staphylococcus epidermidis, and Staphylococcus saprophytes. The characteristics of Clinical symptoms analysis from the bacteria causing subclinical Mastitis as seen as udder redness, swelling, and fever. There are tissue necrosis in the nipple and part of the udder. The milk parenchyma becomes fribillated, and the milk produced becomes mixed with blood, drips continuously, and appears watery in the presence of flakes, clots, and mucus. Implementation Early, prompt, and accurate diagnostic examinations must be carried out to prevent the occurrence of subclinical mastitis so that the objective can benefit the farmers for the future livelihood of the farm

Solar-powered electric car: validity and effectivity of prop in energy conversion learning Rizal, Rahmat; Aripin, Haji; Joni, I Made
Journal of Education and Learning (EduLearn) Vol 18, No 3: August 2024
Publisher : Intelektual Pustaka Media Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/edulearn.v18i3.21720

The research aimed to describe the development of solar electric cars as a prop in energy conversion learning using the analyze, design, develop, implement, and evaluate (ADDIE) model and to ascertain the effectiveness of an electric car as a prop in energy conversion learning. Utilization of prop in the learning process is one way to support the development of knowledge, skills, and basic needs for delivering material, concepts, and physics information. This research is a descriptive study involving media and pedagogical experts and 40 students of the university in Tasikmalaya. Data collection techniques were carried out through the study of literature, expert validation, and student perception questionnaires. Expert validation and student perception were obtained by using a Likert scale. The expert judgment results were processed using the V value equation developed by Aiken. The results showed a value of 1, meeting the minimum validation requirements. The students also had positive responses to a prop. They have new experience learning in energy conversion and have good media to help their comprehension. It has a significant impact on helping students to achieve their learning goals.

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