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All Journal Jurnal Kimia dan Kemasan JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Unnes Science Education Journal Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Jurnal Biodjati JPM (Jurnal Pemberdayaan Masyarakat) Communications in Science and Technology Walisongo Journal of Chemistry Jurnal Kartika Kimia Jurnal Graha Pengabdian Jurnal Kimia dan Kemasan Jurnal Ilmiah Ibnu Sina (JIIS): Ilmu Farmasi dan Kesehatan
Retnosari, Rini
Universitas Negeri Malang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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Pendampingan Masyarakat Dalam Rehabilitasi Hutan dengan Memanfaatkan Teknologi Geospasial di Desa Resapombo Kabupaten Blitar Gea, Gea Aliajanah; Alfi Sahrina; Baiti, Putri Agustina Nur; Rini Retnosari; Nisa, Izzati Farhatun
Jurnal Pemberdayaan Masyarakat Vol 9 No 1 (2024): Mei
Publisher : Direktorat Penelitian dan Pengabdian kepada Masyarakat (DPPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/jpm.v9i1.8307

Abstract

Agriculture is a great potential in Resapombo Village. However, over time the community has not been able to use the land properly so that the land becomes less productive. The land experiences landslides, especially when rain occurs due to the absence of standing plants or trees that become water catchment. There is a need for forest rehabilitation by utilizing geospatial technology. Forest rehabilitation aims to restore forest functions. The methods used in this community service activity are coordination and socialization to the community, plant breeding, planting seedlings, aerial photography, and aerial photo processing, as well as making maps. The result of this community service activity is the Map of the Forest Rehabilitation Planting Area of Resapombo Village-Blitar Regency. The map made can be utilized in effective and efficient forest management and plant monitoring to be optimal. People with high enthusiasm and awareness and concern for the surrounding environment, especially forests, are provisions for the success of forest rehabilitation carried out. The community is expected to be more protective and understand the importance of forests for their survival, especially for the next generation.
Assisted ultrasonic wave of vanillin derivatives synthesis and antioxidant activity using DPPH method Retnosari, Rini; Sari, Karina Kurnia; Marfu'ah, Siti; Sutrisno; Rachman, Ihsan Budi
Communications in Science and Technology Vol 7 No 2 (2022)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.7.2.2022.963

Abstract

In recent years, the need for compounds with antioxidant activities have expanded. Generally, the natures of these compounds involve the presence of conjugated double bonds, phenolic groups, and resonance effects on the structure. One of the compounds with the phenolic group is vanillin. It can be modified into the derivative of 1,8-dioxo-octahydroxantene compound due to its aldehyde content. Meanwhile, 1,8-dioxo-octahydroxantene compound has two 2- cyclohexenone rings bound in the pyran ring and one phenolic group, expected to carry more excellent antioxidant activity than vanillin. The 9-(4-hydroxy-3-methoxyphenyl)-3,4,5,6,7,9- hexahydro -1H-xantene-1,8(2H)-dione (Compound 1) was synthesized from 1,3- cyclohexanedione and vanillin through Knoevenagel's condensation reaction aided with an acid catalyst with a single reaction phase. Besides, green chemistry was adopted in this study using environmentally friendly catalysts from lime juice and ultrasonic wave. The synthesized compounds' structure was confirmed through the spectrophotometer IR, GC-MS, and 1H-NMR spectrometer, while its antioxidant activity was tested using the DPPH method. The reaction occurred with and without lime juice catalyst, producing yields of 6.65% and 70.58%, respectively. The results of the antioxidant activity test suggest that Compound 1 carries substantially robust antioxidant activities, with IC50 of 0.99 ppm.
Pengaruh Jenis Alkohol pada Sintesis Alkil Ester dari CPO melalui Reaksi Transesterifikasi Menggunakan Katalis Heterogen CaO-MgO Santoso, Aman; Rizky, M; Sumari, Sumari; Wijaya, Anugrah Ricky; Retnosari, Rini; Asrori, Muhammad Roy
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 5 No. 1 (2021)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2021.005.01.01

Abstract

Low quality CPO can be made alkyl esters by transesterification reaction by alcohol. The type of alcohol that is often used in the transesterification reaction is methanol but is toxic, so we need an alternative type of alcohol. The purpose of this research is the synthesis of alkyl esters from CPO through transesterification reaction using heterogeneous catalyst CaO-MgO with different types of alcohol. This experimental laboratory research through stages:  CPO refinement, activation of CaO-MgO catalysts,  synthesis of alkyl esters from CPO with two types alcohol, identification of the components of the synthesis compound of the synthesized alkyl ester mixture using GC-MS. The results showed that (1) alkyl esters can be synthesized from CPO through the transesterification reaction with methanol and CaO-MgO catalysts with a yield of 85.72%, while the transformation of ethanol is difficult to form ethyl ether (2) the character of methyl ester synthesized has a density 0.86 g / mL, viscosity 3.23 cSt, refractive index 1.44819, and acid number 0.747 mg KOH / g methyl ester, (3) the main component of the synthesized alkyl ester contains 1,200% methyl myristic compound, methyl palmitate 40,637% methyl linoleate 9.332%, methyl 7-octadecenoate 42.986%, and methyl stearate 4.427%.
Co-Authors Aman Santos Aman Santosa Aman Santoso Anugrah Ricky Wijaya Baiti, Putri Agustina Nur Ciptawati, Endang Danar Danar Daratu Eviana Kusuma Puteri Dedek Sukarianingsih Farashinta Nadia Gea, Gea Aliajanah Hayuni Retno Widarti Hunumi Oktiyani Rusdi Karim Handoyo Marfuaf, Siti Muhammad Roy Asrori Muntholib Nisa, Izzati Farhatun Novida Pratiwi Nurul Ultiyati Rachman, Ihsan Budi Rahma Diyan Martha Rizky, M Sahrina, Alfi Sari, Karina Kurnia Siti Marfuah, Siti Sitoresmi Prabaningtyas Sumari Sumari SUTRISNO Sutrisno Sutrisno Syafiuddin Syafiuddin