Article Per Year (5 Year)
p-Index From 2021 - 2026
3.701
P-Index
This Author published in this journals
All Journal Jurnal Kimia Riset Alotrop Jurnal Pendidikan dan Ilmu Kimia JMM (Jurnal Masyarakat Mandiri) Logista: Jurnal Ilmiah Pengabdian Kepada Masyarakat Molekul: Jurnal Ilmiah Kimia ALKIMIA : Jurnal Ilmu Kimia dan Terapan Jurnal Inovasi Teknik Kimia Journal of Appropriate Technology for Community Services Jurnal ABDINUS : Jurnal Pengabdian Nusantara Bubungan Tinggi: Jurnal Pengabdian Masyarakat Konservasi Hayati Current Research on Biosciences and Biotechnology Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Nanggroe: Journal Of Scholarly Service Nanggroe: Journal of Scholarly Service Jurnal Pengabdian Kesehatan Beguai Jejama Jurnal Sains Materi Indonesia Jurnal Bioteknologi & Biosains Indonesia (JBBI) Jurnal Bioteknologi & Biosains Indonesia
Retno Agnestisia
Program Studi Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Palangka Raya
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Public Health Social Sciences Other

Published : 27 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 27 Documents
Search

 1   2   3 
Upaya Meningkatkan Minat Siswa/i SMAN 1 Palangka Raya Untuk Melanjutkan Kuliah ke Jenjang Perguruan Tinggi Remi Ayu Pratika; Retno Agnestisia; Diah Ayu Pramoda Wardani; Ansori Rahman; I Nyoman Sudyana
Jurnal Pengabdian Kesehatan Beguai Jejama Vol 4, No 2 (2023): Jurnal Pengabdian Kesehatan Beguai Jejama Volume 4 Nomor 2 Agustus 2023
Publisher : Poltekkes Kemenkes Tanjung Karang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26630/jpk.v4i2.13434

Abstract

Proses Seleksi Nasional Penerimaan Mahasiswa Baru (SNPMB) mengharuskan calon mahasiswa memiliki pengetahuan yang mumpuni sebelum mengikuti proses seleksi. Pelaksanaan kegiatan pengabdian dilakukan kepada siswa kelas XII SMA Negeri 1 Palangka Raya berdasarkan kondisi para siswa yang masih belum mengetahui strategi yang tepat dalam menentukan pilihan perkuliahan di Perguruan Tinggi. Tujuannya pelaksanaanya adalah memberikan pengetahuan terkait strategi masuk ke Perguruan Tinggi pilihan serta motivasi untuk menumbuhkan minat siswa dalam mengikuti seleksi masuk Perguruan Tinggi. Metode yang digunakan adalah sosialisasi dalam bentuk ceramah dan diskusi serta pada tahap akhir dilakukan evaluasi. Peserta sosialisasi sebanyak 28 orang merupakan perwakilan dari siswa/i kelas XII. Hasil sosialisasi menunjukkan peserta kegiatan memberikan respons positif terhadap materi yang diberikan. 75% dari siswa/i peserta kegiatan menyatakan Sangat Setuju jika tema kegiatan sesuai dengan yang dibutuhkan. Siswa/i memilih Setuju (32%) dan Sangat Setuju (68%) jika materi yang disampaikan mudah dipahami serta Siswa/i menyatakan Setuju (29%) dan Sangat Setuju (71%) jika pengetahuan mereka mengalami peningkatan.
Training on the Making of Eco-Enzyme Disinfectants as a Sustainable Strategy for Processing Organic Waste Retno Agnestisia; Erwin Prasetya Toepak; Yuliana Yuliana; Rizki Rachmad Saputra; Marvin Horale Pasaribu; Abed Nego Purba; Okta Prianus
Bubungan Tinggi: Jurnal Pengabdian Masyarakat Vol 6, No 2 (2024)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/btjpm.v6i2.10369

Abstract

The community in Habaring Hurung Urban Village, Bukit Batu District, Palangka Raya City, is grappling with the issue of accumulating household waste, primarily composed of organic waste. The prevalent practices of managing this waste, such as landfilling, burning, or haphazardly piling it around residential areas and roadsides, pose environmental and health risks. In response to this challenge, an initiative was undertaken to empower families in Habaring Hurung Urban Village through training sessions on creating disinfectants using eco enzymes derived from fermented organic waste. The method of implementing community service consists of the preparation stage, namely digging up information on training needs, and preparing materials and teaching aids; the implementation stage in the form of pre-final tests and training; and the last stage in the form of evaluation and reporting, took place on September 4, 2023, at the office hall of Habaring Hurung Urban Village. A total of 39 participants actively engaged in the training, displaying enthusiasm and a positive response. The results of the questionnaire also showed a fairly good level of satisfaction of all participants regarding the theme of the activity, the presentation was easy to understand, the participants' knowledge increased, and this activity should be continued by all participants where the percentage of participants who agreed showed a value of 56.4%. 51.3%, 66.7%, and 53% respectively. The ultimate goal of this initiative is to educate the local community on transforming organic waste into multifunction products for everyday use.
POTENTIAL OF MAGNETITE (Fe₃O₄) SYNTHESIZED FROM ZIRCON SAND WASTE AS METHYLEN BLUE DYE ADSORBENT Marvin Horale Pasaribu; Karelius Karelius; Retno Agnestisia; Erwin Prasetya Toepak; Zimon Pereiz
Jurnal Inovasi Teknik Kimia Vol 9, No 2 (2024)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v9i2.10112

Abstract

Zircon sand mining is a major industry in Indonesia due to the country's vast zircon reserves. However, this industry also generates hazardous waste that can pollute the environment. This study aims to investigate the potential of magnetite (Fe₃O₄) synthesized from magnetic waste generated during zircon sand mining as an adsorbent for methylene blue dye removal. Magnetite was successfully synthesized via the co-precipitation method and characterized using XRD and FTIR. The synthesized magnetite demonstrated the ability to adsorb methylene blue from aqueous solutions with an adsorption efficiency of 68.52% after 80 minutes of contact time. The adsorption kinetics followed the pseudo second order model, evidenced by R² value of 0.9918, and the adsorption isotherm fitted the Langmuir model, indicating adsorption energy of 24.51 kJ/mol and adsorption capacity of 69.678 mg/g. These findings demonstrate the effectiveness of natural magnetite (Fe₃O₄) derived from zircon sand waste as an adsorbent for methylene blue dye removal. This research not only addresses the environmental issue caused by zircon sand mining waste but also develops a cost-effective and sustainable solution for methylene blue dye removal from wastewater.
Training on Making Eco-Enzyme as a Natural Insecticide and Liquid Organic Fertilizer for Farmer Groups to Create Environmentally Friendly Agriculture Abdul Hadjranul Fatah; I Nyoman Sudyana; Abudarin Abudarin; Soaloon Sinaga; Wahyu Supriyati; Retno Agnestisia; Dessy Analinta; Sugeng Mashabhi
Bubungan Tinggi: Jurnal Pengabdian Masyarakat Vol 6, No 3 (2024)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/btjpm.v6i3.10683

Abstract

Habaring Urung is a sub-district where most farmers work and is one of the local vegetable and fruit-producing areas in Palangka Raya City. So far, farmers tend to use synthetic insecticides and chemical fertilisers obtained from agricultural shops to cultivate plants. Apart from expensive operational costs, synthetic insecticides and chemical fertilisers are known to damage the environment if used over a long period. Therefore, this program aimed to equip the knowledge and skills of farmer groups in the Habaring Hurung Sub-district to make environmentally friendly insecticides and liquid organic fertilisers. This activity was carried out using the Participatory Action Research (PAR) method. Implementation of activities consisted of several stages, i.e., preparation, problem identification, focus group discussions to determine programs that suit the problem, program implementation through training, and evaluation by administering questionnaires. This program was implemented in September 2023 at the Habaring Hurung Sub-district Office Hall with 39 activity participants. The enthusiasm and active participation of participants during the implementation of the program showed a positive response. The questionnaire results as part of the program evaluation also showed that almost all participants agreed (72.22%) and strongly agreed (27.78%) that participants' knowledge and skills increased after participating in this activity program. In addition, this program is also considered very useful and is planned to be continued independently by the activity participants. It shows that the program has increased the knowledge and skills of farmer groups in the Habaring Hurung Sub-district in making insecticides and liquid organic fertilisers that are environmentally friendly and of high value to support sustainable agricultural policies.
A REVIEW ARTICLE: ANTIOXIDANT ACTIVITY IN KALAKAI (Stenochlaena palustris): ARTIKEL REVIEW: AKTIVITAS ANTIOKSIDAN PADA KALAKAI (Stenochlaena palustris) Oksal, Efriyana; Ayuchecaria, Noverda; Agnestisia, Retno; Ariska, Risya; Tampubolon, Mulani Jeni Lestari; Dewi, Sintia Ayu; Maulana, Ilham; Rizkita, Aden Dhana
ALOTROP Vol. 7 No. 2 (2023): Alotrop 2023
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v7i2.29209

Abstract

Kalakai (scientific name Stenochlaena palustris) is a type of fern that is often used by the people of Kalimantan as a vegetable. The Kalakai plant which grows a lot in the lowland swamp areas of Central Kalimantan is a type of fern plant. Kalakai contains high levels of minerals, vitamin C, folic acid, and protein when compared to other local vegetables in Palangka Raya, Central Kalimantan. The active compounds that act as antioxidants in kalakai are flavonoids and phenols. Flavonoids and phenols act as free radical scavengers to prevent diseases that attack the body thereby strengthening the body's immunity. Traditionally, kalakai is consumed by the Dayak people. This article is a review article that uses the descriptive literature study method to find scientific information or research that proves coherently the benefits or applications of the kalakai. Kalakai which activity as an antioxidant has health benefits such as being able to increase hemoglobin levels so that it can prevent anemia has cytotoxicity in MCF-7 breast cancer cells and prevents antihyperlipidemic by reducing Low-density lipoprotein (LDL).
Improving Entrepreneurial Skills Through Training in Making Local Material-Based Reed Diffuser Aromatherapy for the Productive Age Community I Nyoman Sudyana; Retno Agnestisia; Muhammad Irmawan; Risfiah Ruli Cahyani; Eka Jhonatan Krissilvio; Erwin Prasetya Toepak
Bubungan Tinggi: Jurnal Pengabdian Masyarakat Vol 6, No 4 (2024)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/btjpm.v6i4.10737

Abstract

Habaring Hurung is one of the sub-districts in Bukit Batu District, Palangka Raya City, where most of the people work as farmers of vegetables and various types of flowering plants, such as Kenanga Flowers (Cananga odorata). However, the abundance of Kenanga flowers has not been utilized optimally by residents. Therefore, this service activity aims to improve entrepreneurial skills among people of productive age in Habaring Hurung Subdistrict by making reed diffuser aromatherapy products from Kenanga flowers. This service activity is carried out based on the ABCD method (asset-based community development) on September 4, 2023, at the Habaring Hurung Sub District Office Hall with 34 participants. The results showed that the activity participants stated the activity theme according to what was needed. Apart from that, the material presented is also easy to understand, so it can increase participants' knowledge and skills in processing Kenanga flower reed diffuser aromatherapy. This activity is expected to provide local residents with the knowledge and skills to utilize local materials in products of high economic and useful value.
Pemanfaatan Limbah dan Sumber Daya Lokal dalam Pelatihan Pembuatan Pakan Ikan Mandiri untuk Kelompok KUPS Perikanan Desa Tuwung Pasaribu, Marvin Horale; Ariefin, Mokhamat; Ompusunggu, Dicky Perwira; Saputra, Rızkı Rachmad; Agnestisia, Retno; Yuliana, Yuliana; Purba, Abed Nego; Prianus, Okta
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 9 No 1 (2025): Volume 9 Nomor 1 Tahun 2025
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v9i1.23684

Abstract

Tuwung Village, Pulang Pisau Regency, possesses significant potential in the fisheries sector. However, the development of this sector is hindered by the reliance on expensive commercial fish feed, which limits profit margins from fish sales. Furthermore, organic waste generated from agricultural and livestock activities remains underutilized, posing a potential environmental pollution problem. To address these challenges, a training program on independent fish feed production utilizing organic waste and local resources has been implemented. This program aims to equip the KUPS Fisheries Group in Tuwung Village with the knowledge and skills to produce high-quality fish feed at a more affordable cost. Through this training, participants were introduced to the concept of utilizing household vegetable waste and motan fish from Lake Sabuah as alternative feed ingredients. Additionally, they received training in both conventional and mechanical fish feed production processes, employing a specially designed mixer unit. The program outcomes indicate that participants successfully grasped the concept of waste and local resource utilization and are now capable of producing fish feed independently. It is anticipated that this program will enhance the productivity and efficiency of fish farming businesses in Tuwung Village, while simultaneously mitigating the environmental impact of organic waste.
Surface Modification of Hematite using Stearic Acid as Hydrophobic Inorganic Pigment Materials Iqbal, Rendy Muhamad; Agnestisia, Retno; Damsyik, Akhmad; Sinaga, Tiara Cristy Agatha; Khaerudini, Deni Shidqi; Wulandari, Ika Octavia; Susanti, Indri; Putra, Riandy; F. Adany
Jurnal Sains Materi Indonesia Vol. 26 No. 2 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.8982

Abstract

The inorganic pigment is a material that determines the color of a paint that can be used as a coating material. Until now, the basic material for red pigment, namely hematite, has been imported to meet domestic needs. This study aims to develop a hematite-based inorganic pigment material from the mill-scale waste of PT Krakatau Steel by modifying the surface to be hydrophobic, making the pigmenting material resistant to acid attack and preventing peeling and corrosion of the material. The surface modification of hematite is carried out by reacting it with stearic acid into ethanol as a solvent. Hematite was immersed in a stearic acid solution with various concentrations of 2, 4, 6, and 8% for 6 hours; it was then separated by filtration and followed by the drying process. The hematite-stearic was characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR), scanning electron microscope (SEM), and water contact angle (WCA). The results show that the grafting process successfully changed the properties of hematite to hydrophobic. It is also supported by the FTIR spectrum due to the presence of molecular vibration of C-H, C=O, C-O, and Fe-O. Then, the higher contact angle is 150.474° for the stearic acid concentration of 6%.
Eco-friendly Removal of Methylene Blue Using Alginate-Activated Natural Clay Composite Rasidah, Rasidah; Jumiati, Jumiati; Nugroho, Wahyu; Agnestisia, Retno; Karelius, Karelius; Alfanaar, Rokiy; Muhamad Iqbal, Rendy
ALKIMIA Vol 7 No 1 (2023): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/591htf60

Abstract

Methylene blue is a poisonous, persistent, and non-biodegradable dye frequently found in textile industry wastewater that significantly influences the emergence of various environmental and health problems. Therefore, precautions must be taken to reduce the amount of methylene blue in the wastewater. Compositing clay into alginate produces an eco-friendly adsorbent, alginate-activated clay composite beads (Ag-AC 1-5%), successfully removing methylene blue. XRD and FTIR spectroscopy characterization results show that illite, a family of 2:1 clay minerals, is a primary constituent of activated clay. However, FTIR spectroscopy shows that alginate has mannuronic acid residue characteristics. Several batch experiments were carried out to evaluate the effect of the alginate: clay ratio and pH solution on the percentage of methylene blue removal. 
DECOLORIZATION OF TEXTILE DYES WITH CRUDE LIGNINOLYTIC ENZYMES FROM Coriolopsis caperata Agnestisia, Retno; Karelius, Karelius; Oksal, Efriyana; Nion, Yanetri Asi
Jurnal Bioteknologi & Biosains Indonesia (JBBI) Vol. 12 No. 1 (2025)
Publisher : BRIN - Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jbbi.2025.10931

Abstract

The textile industry is a major contributor to global water pollution, releasing an estimated 280,000 tons of synthetic dyes annually into aquatic ecosystems. These dyes, particularly azo compounds, are often toxic, mutagenic, and resistant to conventional wastewater treatment methods. Microbial enzymatic degradation, especially by white-rot fungi, offers a promising eco-friendly alternative. This study aimed to optimize the production of ligninolytic enzymes—Laccase (Lac), manganese peroxidase (MnP), and lignin peroxidase (LiP)—from Coriolopsis caperata, and assess their efficiency in degrading two azo dyes: Reactive Red 21 (RR21) and Reactive Orange 107 (RO107). The fungus, isolated from the Peat Swamp Forest in Sebangau, Central Kalimantan, was cultured in a modified glucose-peptone medium enriched with veratryl alcohol. The optimization parameters included variations in time, dye concentration, and the addition of hydrogen peroxide (H₂O₂). Enzyme activity was quantified spectrophotometrically, and dye decolorization was assessed over time at different dye concentrations. Among the enzymes, Lac showed the highest activity (4938.05 U/L), followed by LiP (995.26 U/L) and MnP (246.47 U/L). These values notably exceed several previously reported benchmarks for fungal enzyme activity. RO107 demonstrated greater susceptibility to enzymatic degradation, with 83.71% decolorization achieved at 24 hours, while RR21 reached 65.71% at 48 hours. The addition of 1 mM H₂O₂ significantly enhanced decolorization, increasing RR21 and RO107 removal to 95.71% and 99.30%, respectively. These results underscore the oxidative synergy between H₂O₂ and ligninolytic enzymes, particularly LiP and MnP. Overall, the study demonstrates the potential scalability of C. caperata-based enzymatic treatment systems for textile effluent bioremediation, supporting compliance with environmental discharge regulations and contributing to sustainable wastewater management.
Co-Authors Abdul Hadjranul Fatah Abdul Hadjranul Fatah Abed Nego Purba Abudarin Abudarin Abudarin, Abudarin Adventus Panda AGUS HARYONO Akhmad Damsyik Akhmad Damsyik Alfanaar, Rokiy Ansori Rahman Ariska, Risya Arum, Diah Panjar Ayuchecaria, Noverda Charles, Adrian Chuchita Damsyik, Akhmad Deni Shidqi Khaerudini Desimaria Panjaitan Dessy Analinta Dewi, Sintia Ayu Diah Ayu Pramoda Wardani Dicky Perwira Ompusunggu Edy Prasetyo Eka Jhonatan Krissilvio Erwin Prasetya Toepak Erwin Prasetya Toepak Erwin Prasetya Toepak Erwin Prasetya Toepak F. Adany Frans Grovy Naibaho Gabriela Elsandika Hakim, Muh. Supwatul I Made Sadiana, I Made I Nyoman Sudyana I Nyoman Sudyana I Nyoman Sudyana I Nyoman, Sudyana, Ilham Maulana Indri Susanti Iqbal, Rendy Muhamad Ivan Permana Putra Jumiati Jumiati Junita Dongoran Karelius Karelius Karelius Karelius Karelius Karelius Karelius, Karelius Krissilvio, Eka Jhonatan Lumbantoruan, Lidia Amelia Marvin Horale Pasaribu Midun Efendi Patar Sihombing Mokhamat Ariefin Muhamad Iqbal, Rendy Muhammad Irmawan Narsito Narsito Noer Komari Nyahu Rumbang Oksal, Efriyana Okta Prianus Prianus, Okta Purba, Abed Nego Rahayu, Putri Rasidah Rasidah, Rasidah Razikin, Syahrul Remi Ayu Pratika Rendy Muhamad Iqbal Rendy Muhamad Iqbal Rendy Muhamad Iqbal Riandy Putra Risfiah Ruli Cahyani Rizki Rachmad Saputra Rizkita, Aden Dhana Sinaga, Tiara Cristy Agatha Siswo Siswo Soaloon Sinaga Sri Yulandari Simangunsong Sudyana, I Nyoman Sugeng Mashabhi sunardi sunardi Sunardi Sunardi Suni, Muhammad Ikhwan Suyanta Suyanta Tampubolon, Mulani Jeni Lestari Togatorop, Hanna Esrani Wahyu Nugroho Wahyu Supriyati Wayan Adhi Nareyasa Whendy Trissan Widya Krestina, Luqman Hakim, Dyah Ayu Pramoda Wardani, Wulandari, Ika Octavia Yanetri Asi Nion, Yanetri Asi Yuliana Yuliana Yuliana Zimon Pereiz