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All Journal Jurnal Ilmu dan Teknologi Kayu Tropis SENADA : Semangat Nasional Dalam Mengabdi Serambi Engineering International Conferences On Early Childhood Education Proceedings
Rahmi Utami
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Other

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Antioxidant and Tyrosinase Inhibitor Activities of Methanol Extracts of Acacia mangium Rita K Sari; Rahmi Utami; Irmanida Batubara; Anne Carolina; Salina Febriany
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.652 KB) | DOI: 10.51850/jitkt.v13i1.63

Abstract

Active compounds utilization of its extractives for cosmetic products increase the value added of mangium tree. The purpose of this study was to determine the antioxidant and an inhibitor tirosinase activities of methanol extract of the various parts of mangium tree. Phytochemical properties of the best extract were also anlayzed. Extraction was conducted by soxhletation in methanol for 12 hours. The antioxidant and tyrosinase inhibitory activities of the extracts were tested in vitro to radical of 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging and inhibition to tyrosinase enzyme. The results showed that leave resulted in the highest methanol ectract followed succesively by bark, heartwood, and sapwood the value of 10.7; 4.4; 2.5; and 0.9%, respectively. The highest antioxidant activity was bark extract and followed by leave, heartwood, and sapwood extracts with EC50 values respectively of 8.3; 26.7; 66.9; and 137.9 ppm. Only bark extract which classified as an active tyrosinase inhibitor with IC50 value of 257.8 ppm in the difenolase reaction. The IC50 value of the positive control (kojic acid) was 116.7 ppm. The other extracts relatively inactive as a tyrosinase inhibitor because their IC50 values > 1000 ppm. The qualitative analysis detect the methanol extract of mangium bark as the best extract containing phenolic compounds (phenol hirokinon, flavonoids, and tannins) and alkaloids which were thought to contribute to the high antioxidant and tyrosinase inhibitor activities.Keywords: Acacia mangium, antioxidant, extracts, tyrosinase inhibitor
The Use of Props Educative For Enhancement Teacher creativity _ Towards Quality PAUD through Teacher Training Dian Puspita; Lilis Suryani; Rahmi Utami; Dewie Hartati; Neneng Yuliana; Luluk Maryam
International Conferences on Early Childhood Education Proceedings Vol 1 No 2 (2023): International Conference on Early Childhood Proceeding
Publisher : Universitas Panca Sakti Bekasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51714/icec.v1i2.112

Abstract

This research was motivated by the lack of teacher creativity in making APE , as well as the limited knowledge of East Cikarang IGRA teachers about Educational Aids (APE). APE as a learning medium is generally a separate obstacle for an institution, especially teachers. The obstacle in this case is related to the availability and very limited variety of APE in institutions. As well as the limited ability of teachers to do design and creativity. Therefore, training on making APE, namely smart trees, was held to increase teacher creativity in teaching IGRA teachers in East Cikarang District, Bekasi Regency, which was held at RA Senyum Muslim. This study aims to find out whether the use of educational aids can increase teacher creativity in the framework of leading to quality PAUD. This training is carried out for one full day, namely from 08.00 WIB to 16.00 WIB, on March 11, 2023. The method used in this research is qualitative approach with descriptive method. This study further concludes that the use of educational aids can increase teacher creativity in the framework of leading to quality PAUD.
Pelatihan Pemasaran Digital di SMK Al Ihsan Meruya, Jakarta Barat Harry Jundrio; Ardiansyah; Indira Tribhuwana; Rahmi Utami; Shalfi Andri
SENADA : Semangat Nasional Dalam Mengabdi Vol. 5 No. 2 (2024): SENADA : Semangat Nasional Dalam Mengabdi
Publisher : Politeknik Bina Madani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56881/senada.v5i2.246

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk membekali lulusan SMK Al Ihsan Meruya, Jakarta Barat untuk memasuki dunia kerja. Kegiatan pengabdian ini dikemas dalam bentuk pelatihan dengan mengambil tema pemasaran digital. Secara spesifik, tema difokuskan pada tools dan implementasi pemasaran digital, dengan memberikan perbandingannya dengan teknik pemasaran tradisional. Peserta pelatihan merupakan siswa-siswa kelas XII yang telah lulus. Secara umum, peserta pelatihan telah dapat memahami konsep pemasaran secara umum dengan baik, termasuk perbedaan pemasaran tradisional dengan pemasaran digital. Namun demikian, peserta pelatihan belum dapat memahami signifikasi dari kedua teknik pemasaran tersebut. Peserta pelatihan masih menganggap bahwa teknik pemasaran tradisional lebih penting dibandingkan teknik pemasaran digital. Dengan mengikuti pelatihan ini, peserta diharapkan dapat mengaplikasikan konsep-konsep pemasaran digital, baik di perusahaan maupun untuk usaha sendiri. Selain itu, peserta diharapkan dapat mengimplementasikan teknik pemasaran digital dan pemasaran tradisional secara berimbang. Pelaksanaan kegiatan pengabdian kepada masyarakat ini terlaksana berkat kerja sama dengan Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Tempo yang didukung oleh perwakilan mahasiswa Politeknik Tempo yang berasal dari beberapa Program Studi. Sumber dana pelaksanaan menggunakan biaya dari Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Tempo.
Analisis Dispersi Polutan SO2 dan NOx dengan Model AERMOD (Studi Kasus: PLTU Pangkalan Susu PT. PLN Indonesia Power PGU) Syukri Hadi Novri Siregar; Isra’ Suryati; Lies Setyowati; Rahmi Utami; Meidina Zulfa Hanie; Affandi Lubis; Randy Zulkarnain
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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

Abstract

Coal-fired power plants produce emissions of particulate matter and gases such as NOx, SO2 and Hg, which can have adverse effects on living organisms. Modelling is one method used to estimate the impact of an emission. In addition, the pollutant dispersion model can be used to assess the compliance of an industry's ambient air sampling points. The model used in this study is AERMOD, which is a steady state model influenced by the existing meteorological conditions. The study site is Pangkalan Susu PLTU (2x200 MW) with NOx and SO2 parameters. The purpose of this study was to analyse the distribution patterns of NOx and SO2 concentrations using the AERMOD model, to analyse the differences in pollutant distribution models in wet and dry months, and to validate the modelling with field observations. The results showed that the maximum concentration of the model was 17.4 µg/m3 for NOx and 16.2 µg/m3 for SO2. The simulation results of the AERMOD model show the impact distribution area to the southeast in the wet month and to the northeast in the dry month of the Pangkalan Susu PLTU. The validation results show that the model is in agreement with the field observations.
Co-Authors Affandi Lubis Anne Carolina Ardiansyah Dewie Hartati Dian Puspita Harry Jundrio Indira Tribhuwana Irmanida Batubara Isra’ Suryati Lies Setyowati Lilis Suryani Luluk Maryam Meidina Zulfa Hanie Neneng Yuliana Randy Zulkarnain Rita Kartika Sari Salina Febriany Shalfi Andri Syukri Hadi Novri Siregar