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All Journal Pelita - Jurnal Penelitian Mahasiswa UNY Al-Kimia JMM (Jurnal Masyarakat Mandiri) Jurnal Jejaring Matematika dan Sains Community Empowerment Jurnal Mandala Pengabdian Masyarakat CHEDS: Journal of Chemistry, Education, and Science IJCR (Indonesian Journal of Chemical Research) Jurnal Sains dan Teknologi Cipasung Techno Pesantren: Scientific Journal Jurnal KALANDRA Jurnal Sains Materi Indonesia Ulil Albab Bohr: Jurnal Cendekia Kimia
Andra Ari P., Eko Marwanto Heru Mulyantoro Dwi Hermayantiningsih
Universitas Palangka Raya
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary Other

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BIOETANOL GEMBILI LIAR (Dioscorea Esculenta L)SEBAGAI OCTANE IMPROVER BAHAN BAKAR BENSIN RAMAH LINGKUNGAN Heru Mulyantoro, Eko Marwanto, Andra Ari P., Dwi Hermayantiningsih
Pelita - Jurnal Penelitian Mahasiswa UNY Volume III, Nomor 1, April 2008
Publisher : Pelita - Jurnal Penelitian Mahasiswa UNY

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Abstract

This research is intended to 1) to know the production process of bioetanol fromwild purplish edible tuber, 2) to know the influence of purplish edible tuber bioetanoltoward the octane rate of gasoline, 3) to know the influence of wild-purplish edible tuberbioetanol as octane improver of gasoline toward the emission of motorcycle combustion.This research employed experiment method involving the preliminary research ofwild- purplish edible tuber bioetanol, the production of wild-purplish edible tuber bioetanol,blended bioetanol and gasoline, eco-friendly gasoline research, and analysis.The result of the research reveals that 1) the production process of wild-purplishedible tuber is initiated by the hydrolysis process, fermentation, and distillation. Theoptimum period to get etanol of the purplish edible tuber with the treatment 1.2 gramof yeast for 100gram of purplish edible tuber is 46 hours of fermentation. The employeddestillation is highrise distillation to get etanol content 96%, 2) the influence of thebioetanol mixture in gasoline can increase octane rate at sequentially mixture 10%,20%, 30% respectively 3 point, 2.3 point, and 4.8 point, 3) the influence of bioetanolmixture in gasoline toward the emission of exhaust gas, carbon monoxide (CO) at allmixture ratio decreases while the emission of hydrocarbon decreases at the mixtureratio 10% and increases on the 20% and 30%.Key Words: bioetanol, wild purplish edible tuber, gasoline
Sosialisasi Pembuatan Sabun Herbal dari Minyak Atsiri Kenanga dan Lemon di SMA Muhammadiyah 1 Palangka Raya Erwin Prasetya Toepak; Dwi Hermayantiningsih; Muh. Supwatul Hakim
KALANDRA Jurnal Pengabdian Kepada Masyarakat Vol 2 No 4 (2023): Juli
Publisher : Yayasan Kajian Riset Dan Pengembangan Radisi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55266/jurnalkalandra.v2i4.309

Abstract

Proses pembelajaran dikelas harus menghadirkan suasana pembelajaran yang kreatif dan inovatif. Suasana yang baru dapat menjadikan siswa lebih mudah paham dengan materi yang disampaikan dan antusias dalam mengikuti proses pembelajaran khususnya mata pada pelajaran Kimia. Kegiatan pelaksanaan pengabdian masyarakat ini memberikan sosialiasi dan praktik pembuatan sabun herbal dengan menggunakan minyak atsiri kenanga dan lemon. Kegiatan ini bertujuan untuk memberikan pengetahuan tentang proses pembuatan sabun herbal di SMA Muhammadiyah 1 Palangka Raya. Pengabdian masyarakat ini secara umum meliputi 3 kegiatan yaitu persiapan, pelaksanaan dan evaluasi. Kegiatan ini berlangsung sehari dan diikuti oleh 29 peserta. Proses pembuatan sabun dapat difahami dengan baik oleh peserta dan seluruh kegiatan berjalan dengan baik dan lancar.
Study of the Effect of Domestic Wastewater from Jalan Lele Residents of Palangka Raya City on the Acidity and Alkalinity Levels of the Receiving Water Body: Studi Pengaruh Air Limbah Domestik Penduduk Jalan Lele Kota Palangka Raya terhadap Kadar Asiditas dan Alkalinitas Badan Air Penerima Manurung, Tety; Natalia, Nasa; Suma, Joy Angel Aria; Purba, Abed Nego; Naiya, Naiya; Hulu, Dominique F.S.; Rosmainar, Lilis; Hermayantiningsih, Dwi
Jurnal Jejaring Matematika dan Sains Vol. 5 No. 1 (2023): Jurnal Jejaring Matematika dan Sains
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jjms.2023.v5.i1.805

Abstract

This research aims to determine the impact of domestik waste water disposal produced by residents living on Jalan Lele, Palangka Raya City, on the value of acidity and alkalinity levels in the receiving water body. The acidity level obtained was 24.098 mg/L and the alkalinity level was 254.410 mg/L. The acidity levels not comply to the Government Regulation Number 20 of 1990 levels and Government Regulation Number 82 of 2001 for standart water quality type B. Similarly for alkalinity levels doesn’t comply to World Heal Organization Regulation 2011 for irrigation water. Based on the results ​​of high levels of acidity and alkalinity in receiving water bodies, it encourages further research to be carried out for monitoring and handling domestik waste in residential areas in the city of Palangka Raya.
A Studi Kasus: Analisis Laju Korosi Terhadap Berbagai Jenis Paku Hakim, Muh. Supwatul; Hermayantiningsih, Dwi; Nainggolan, Yuni; Sugiyani, Tina; Simbolon, Wenika; Yuneta; Silalahi, Anasthasya
Cipasung Techno Pesantren: Jurnal Ilmiah Vol 18 No 1 (2024): Cipasung Techno Pesantren: Scientific Journal
Publisher : LPPM Sekolah Tinggi Teknologi Cipasung

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Abstract

Abstract— This research aims to determine the corrosion rate of different types of nails by immersing them in water of the same quality. The method used is weight loss method. Each nail was immersed in water for 1–7 days and then weighed every day. The highest corrosion rate was obtained for steel nails with an average corrosion rate of 0.09 mmpy and the lowest corrosion rate was obtained for wall nails with an average corrosion rate of 0.02 mmpy. The largest difference in nail weight after soaking was for the umbrella nail at 0.48 grams, while the smallest difference in nail weight was for the wall nail at 0.11 grams.
Herbal drink training as a solution for dengue hemorrhagic fever treatment in Menteng Village Dwi Hermayantiningsih; Reny Rosalina; Zahrotun Nafisah; Sudarman Rahman
Community Empowerment Vol 10 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ce.12213

Abstract

Menteng Village, located in the Jekan Raya Subdistrict, Palangka Raya City, experiences health problems due to the increasing prevalence of dengue hemorrhagic fever (DHF) during the rainy season. To equip the community with the necessary knowledge to address this issue, a community service team conducted outreach and training on making local herbal-based drink supplements to increase platelet levels in DHF patients. The outreach included information on the importance of platelets in DHF and the pharmacological properties of herbal plants such as papaya leaves, sweet potato leaves, and patikan kebo leaves. The activity continued with training on herbal infusion techniques. The evaluation results showed an increase in participants' understanding of DHF and herbal supplements, from only 27% who were at a very knowledgeable level before the activity to 80% after the activity. This activity successfully increased participants' knowledge of DHF treatment and provided practical skills in making herbal supplements.
Empowering Talian Kereng Village farmer groups through independent organic fertilizer production based on local resources for sustainable agriculture Rosalina, Reny; Hermayantiningsih, Dwi; Priyadi, Muhammad; Decenly, Decenly; Putri, Alayya Adistia; Sametri, Ni Wayan Septia
Community Empowerment Vol 10 No 2 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ce.12340

Abstract

Talian Kereng Village, located in Katingan Hilir District, Central Kalimantan, faces challenges regarding the availability of fertilizers for upland rice farmers on peatlands, with a heavy reliance on government-subsidized chemical fertilizers. To address this issue, a community empowerment program was implemented to promote independent organic fertilizer production using local resources. The program involved education and training for the Maju Bersama farmer group on the production of decomposers, liquid organic fertilizer (eco enzyme), and compost from household waste and harvest residues. The results showed a significant increase in knowledge, where initially, 53.9% of participants had limited understanding of decomposer and eco enzyme production, but after the training, 95.3% of participants fully comprehended the material. Furthermore, all participants became skilled in producing organic fertilizers. This program is expected to enhance farmers' self-sufficiency in meeting fertilizer needs, reduce dependence on chemical fertilizers, and support agricultural sustainability in Talian Kereng Village.
Studi Penggunaan Beda Potensial Pada Elektrodeposisi Ion Tembaga(II) Dwi Hermayantiningsih; Yuliana
Bohr: Jurnal Cendekia Kimia Vol 1 No 02 (2023): Bohr: Jurnal Cendekia Kimia Vol 01 No 02
Publisher : Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Palangka Raya

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Abstract

Teknik elektrodeposisi umumnya diterapkan untuk memperoleh penampilan fisik, kekuatan struktural, dan keawetan logam yang baik. Tujuan penelitian ini untuk mengetahui potensial optimum pada elektrodeposisi tembaga(II). Elektrodeposisi menggunakan larutan elektrolit CuSO4 sebagai sumber ion tembaga(II), H2SO4 sebagai elektrolit pendukung, dan HNO3 sebagai depolarisator. Lempeng platina digunakan sebagai elektroda (katoda dan anoda) dengan variasi beda potensial yaitu 2, 3, 4, 5, dan 6 Volt selama 25 menit. Selama proses elektrodeposisi, peningkatan beda potensial larutan CuSO4 mempercepat pengendapan logam Cu, namun deposit yang dihasilkan kualitasnya semakin menurun (banyak yang terbakar dan tidak menempel kuat di katoda). Hasil penelitian menunjukkan bahwa kondisi elektrodeposisi optimum dicapai pada beda potensial 2 Volt yang ditunjukkan dengan tampilan deposit yang cemerlang, menempel kuat di katoda, dan memiliki permukaan rata.
PELATIHAN PEMBUATAN MIE KAYA SERAT-PROTEIN DARI UBI JALAR DAN IKAN SELUANG SEBAGAI UPAYA PENCEGAHAN STUNTING Yuliana Yuliana; Hanasia Hanasia; Ysrafil Ysrafil; Muh. Supwatul Hakim; Dwi Hermayantiningsih
JMM (Jurnal Masyarakat Mandiri) Vol 9, No 1 (2025): Februari
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v9i1.27789

Abstract

Abstrak: Desa Jabiren menjadi lokus stunting tertinggi di Kabupaten Pulang Pisau mencapai angka 31,6%, lebih tinggi dari rata-rata prevalensi stunting di Kota Palangka Raya (27,8%) dan Provinsi Kalimantan Tengah (26,9%). Kurangnya pemahaman orang tua terhadap asupan gizi balita dan faktor-faktor mencetus stunting berkontribusi atas kejadian 26 balita mengalami stunting dari total 80 balita di Desa Jabiren. Kegiatan ini bertujuan untuk memberikan pelatihan pengolahan pangan lokal yaitu ubi jalar dan ikan seluang menjadi inovasi pangan berupa Mie Kaya Serat-Protein (KASEIN). Peserta kegiatan berjumlah 40 orang dari kader PKK dan kader posyandu. Kegiatan ini dilaksanakan mulai dari persiapan, sosialisasi stunting, pelatihan membuat mie, dan evaluasi. Evaluasi menggunakan kuesioner menunjukkan bahwa peserta sangat setuju (68,33%) dan setuju (31,67%) kegiatan ini dilakukan. Pengetahuan peserta terkait stunting juga meningkat hingga 93,60% dan pelatihan mengolah pangan lokal menjadi Mie KASEIN berhasil dilakukan. Nilai uji organoleptik mie memperoleh 51,7% (sangat suka) dan 48,3% (suka). Peserta diharapkan terus berinovasi mengolah pangan lokal sebagai upaya pencegahan stunting.Abstract: Jabiren Village has the highest stunting prevalence in Pulang Pisau District at 31.6%, higher than the average stunting prevalence in Palangka Raya City (27.8%) and Central Kalimantan Province (26.9%). Parents' lack of understanding of toddler nutrition and the factors that trigger stunting contributed to the incidence of 26 stunted toddlers out of a total of 80 toddlers. This project aims to provide training in processing local food, namely sweet potato and seluang fish into food innovations in the form of Fiber-Protein Rich Noodles. There were 40 participants from PKK and Posyandu cadres. The activity begins with preparation, socialization of stunting, training in making noodles, and evaluation. Questionnaire evaluation showed that participants strongly agreed (68.33%) and agreed (31.67%) with project implementation. Participants' knowledge of stunting also increased to 93.60% and the training was successfully. The organoleptic test value of the noodles was 51.7% (very like) and 48.3% (like). Participants are expected to keep innovating in processing local food to prevent stunting.
PREPARASI DAN IDENTIFIKASI GARAM TEMBAGA(II): SINTESIS [Cu(NH₃)₄]SO₄·H₂O SEBAGAI GARAM KOMPLEKS DAN [CuNH₄)₂(SO₄)₂·6H₂O SEBAGAI GARAM RANGKAP Hermayantiningsih, Dwi; Hakim, Muh. Sunwatul; Manurung, Tety Wahyuningsih; Fiqih, Irvan Maulana; Zahra, Laila
CHEDS: Journal of Chemistry, Education, and Science Vol 9, No 1 (2025)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v9i1.11335

Abstract

Penelitian ini bertujuan untuk membandingkan sintesis dan karakterisasi garam kompleks tetra amina tembaga(II) sulfat monohidrat ([Cu(NH₃)₄]SO₄·H₂O) dengan garam rangkap kupri amonium sulfat heksahidrat ([Cu(NH₄)₂(SO₄)₂·6H₂O]). Metode sintesis melibatkan kristalisasi dari larutan tembaga(II) sulfat pentahidrat (CuSO₄·5H₂O) dengan amonia berlebih untuk garam kompleks, dan pencampuran stoikiometris dengan amonium sulfat ((NH₄)₂SO₄) untuk garam rangkap. Hasil sintesis menunjukkan bahwa garam kompleks berwarna biru tua karena transisi elektronik d-d pada ion [Cu(NH₃)₄]²⁺ dengan geometri bidang persegi, sedangkan garam ganda berwarna biru muda karena lingkungan oktahedral [Cu(H₂O)₆]²⁺. Uji kelarutan dan stabilitas terhadap air suling dan NH₃ pekat mengungkapkan bahwa garam kompleks lebih rentan terhadap perubahan pH, menghasilkan endapan coklat tua (Cu⁰) saat dipanaskan, sedangkan garam ganda tetap stabil dengan warna biru muda yang persisten. Hasil sintesis garam ganda mencapai 91,765%, lebih tinggi daripada garam kompleks (75,804%), karena stabilitas termodinamika dan ketahanan terhadap disosiasi. Studi ini menyoroti perbedaan mendasar dalam sifat fisikokimia kedua senyawa, yang relevan untuk aplikasi bahan berbasis tembaga dalam industri dan kimia koordinasi.
Isolation and Characterization of Amylolytic Bacteria From Peatlands Area in Central Kalimantan Nafisah, Zahrotun; Riana Dewi, Syahrani; Ayu Andhita, Naswa; Elya Resha, Enjel; Oksal, Efriyana; Ayu Pratika, Remi; Hermayantiningsih, Dwi
Al-Kimia Vol 13 No 1 (2025): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

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Abstract

Peatlands in Central Kalimantan, Indonesia, are ecologically significant due to their acidic, organic-rich conditions, yet their microbial communities remain underexplored, particularly regarding their enzymatic potential. This study aimed to isolate and characterize amylolytic bacteria from peat soil collected at a depth of 143–150 cm in the LAHG CIMTROP area of Central Kalimantan. A total of 44 bacterial isolates were obtained using serial dilution and the gridding method. Screening for amylase activity identified isolate ENS31 as having the highest activity, shown by a clear halo on starch agar. ENS31 was further subjected to biochemical characterization and enzyme activity assays. The amylase enzyme exhibited optimal activity at pH 7 and 50°C, with a specific activity of 3.5 U/mg, and retained activity up to pH 12 (2 U/mg). These results indicate that ENS31 produces an enzyme stable in alkaline conditions despite originating from an acidic environment, demonstrating potential for industrial applications requiring pH and temperature-tolerant biocatalysts. This study contributes to understanding the functional diversity of peatland microbes and highlights tropical peat ecosystems as promising sources of novel enzymes.  
Co-Authors Afli, Febrianto Aji Pamungkas Andhita, Naswa Ayu Ayu Andhita, Naswa Chuchita, Chuchita Decenly, Decenly Dewi, Syahrani Riana Dwijayanti, Rts. Sherly Elya Resha, Enjel Erwin Prasetya Toepak Fiqih, Irvan Maulana Hakim, Muh. Sunwatul Hakim, Muh. Supwatul Hanasia Hanasia Hanasia, Hanasia Hulu, Dominique F.S. Krissilvio, Eka Jhonatan Lilis Rosmainar Manurung, Tety Mart Grasella Hutapea, Sonia Tri Mokhamat Ariefin Muhammad Priyadi Nafisah, Zahrotun Nainggolan, Yuni Naiya, Naiya Natalia, Nasa Oksal, Efriyana Pratiwi, Endah Yusma Purba, Abed Nego Putri, Alayya Adistia Rahman, Sudarman Remi Ayu Pratika Reny Rosalina Reny Rosalina, Reny Rian Ka Praja Riana Dewi, Syahrani Rizki Rachmad Saputra Roil Bilad, Muhammad Sametri, Ni Wayan Septia Saputri, Desi Riana Silalahi, Anasthasya Simbolon, Wenika Sugiyani, Tina Suma, Joy Angel Aria Sylvani, Miranti Maya Tantri Tety Wahyuningsih Manurung Wahyuningsih Manurung, Tety Ysrafil, Ysrafil Yuliana Yuliana Yuliana Yuneta Zahra, Laila Zahrotun Nafisah Zimon Pereiz