Article Per Year (5 Year)
p-Index From 2020 - 2025
1.182
P-Index
This Author published in this journals
All Journal Jurnal Fisika FLUX Indonesian Journal of Chemistry Akta Kimia Indonesia Chemistry Indonesian Journal of Chemical Research Jurnal Pelayanan dan Pengabdian Masyarakat (Pamas) Jurnal Pengabdian Kepada Masyarakat (Mediteg) Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Molekul: Jurnal Ilmiah Kimia
Dewi Umaningrum
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Lambung Mangkurat University, Jl. A. Yani Km 35,8 Banjarbaru, Kalimantan Selatan, 70714
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences

Published : 26 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 26 Documents
Search

 1   2   3 
SINTESIS AgNPs SECARA REDUKSI KIMIA MENGGUNAKAN CAPPING AGENT KITOSAN DAN PEREDUKSI GLUKOSA Ahmad Budi Junaidi; Ari Wahyudi; Dewi Umaningrum
Jurnal Sains dan Terapan Kimia Vol 9, No 2 (2015)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (774.65 KB) | DOI: 10.20527/jstk.v9i2.2149

Abstract

Kajian sintesis AgNPs pada kitosan sebagai capping agent dan glukosa sebagai agen pereduksi telah dilakukan. Nanopartikel perak disintesis dengan menggunakan metode reduksi kimia selama 1, 2 dan 3 jam pada temperatur titik didihnya. Nanopartikel perak hasil sintesis dikarakterisasi dengan menentukan laju pembentukan, ukuran, morfologi, distribusi ukuran, dan gugus fungsi. Laju pembentukan dianalisis menggunakan spektroskopi UV-Vis. Ukuran, morfologi, dan distribusi ukuran ditentukan menggunakan Transmission Electron Microscope, sedangkan gugus fungsi yang berperan dalam pembentukan AgNPs dianalisis menggunakan spektroskopi FT-IR. Hasil penelitian menunjukkan bahwa AgNPs berhasil disintesis. Pembentukan AgNPs ditandai dengan adanya puncak serapan khas pada λmax 320-430 nm.Penggunaan agen pereduksi glukosa meningkatkan laju pembentukan AgNPs.distribusi ukuran partikel AgNPs yang dihasilkan berkisar antara 2-16 nm dengan Ukuran partikel rata-rata antara 8-9 nm. Hasil penelitian juga menunjukkan bahwa morfologi AgNPs yang dihasilkan berbentuk sferis. Interaksi AgNPs dengan kitosanterjadi melalui gugus NH2, OH, C=O, dan -C-O-C-. Kata kunci : AgNPs, kitosan, glukosa, dan metode reduksi kimia 
KAJIAN pH DAN WAKTU KONTAK OPTIMUM ADSORPSI Cd(II) DAN Zn(II) PADA HUMIN Yunitawati Yunitawati; Radna Nurmasari; Dwi Rasy Mujiyanti; Dewi Umaningrum
Jurnal Sains dan Terapan Kimia Vol 5, No 2 (2011)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.008 KB) | DOI: 10.20527/jstk.v5i2.2099

Abstract

Telah dilakukan penelitian tentang adsorpsi Cd(II) dan Zn(II) oleh humin. Tujuan penelitian ini adalah menentukan kondisi pH optimum, waktu kesetimbangan adsorpsi Cd(II) dan Zn(II) oleh humin serta mengetahui gugus fungsi yang berinteraksi dengan logam dengan menggunakan spektrofotometer FTIR. Hasil penelitian menunjukkan bahwa pH optimum adsorpsi untuk Cd(II) adalah 5 dan pH optimum adsorpsi Zn(II) adalah 2. Waktu kontak reaksi untuk Cd(II) adalah 45 menit dan Zn(II) adalah 30 menit. Hasil spektra inframerah menunjukkan bahwa gugus –COOH dan –OH berperan dalam interaksi antara ion logam dengan humin. Kata kunci : Adsorpsi, Humin, Kadmium, Seng 
PEMBUATAN HAND SANITIZER ALAMI DI DESA CEMPAKA BARU KOTA BANJARBARU Komari, Noer; Dwi Rasy Mujiyanti; Dewi Umaningrum; Dahlena Ariyani
Jurnal Pengabdian Kepada Masyarakat (MEDITEG) Vol. 6 No. 1 (2021): Jurnal Pengabdian Kepada Masyarakat (MEDITEG)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Tanah Laut (Politala)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/mediteg.v6i1.81

Abstract

The spread of Covid-19 was out of control and spread throughout Indonesia, including Banjarbaru which had a red zone. Desa Cempaka Baru Kota Banjarbaru is a transmigration settlement that is still safe against Covid-19. Even though it is safe, the community is quite at high risk of contracting it. People are required to comply with health protocols, especially cleaning their hands, including using a hand sanitizer. The demand for hand sanitizers in the market is increasing and the price is also rising, so an alternative is needed to make your own hand sanitizer. The aim of the activity is to educate village communities to make hand sanitizers by utilizing materials around their environment. The activity stages include socialization, implementation of making hand sanitizers, and evaluation. Assistance in the form of hand sanitizer products, hand washing stations, and banners advising the prevention of Covid-19 transmission were also provided to the public. The process of making hand sanitizers was demonstrated by students who helped with activities and involved 15 women who were members of the “Sasirangan Working Group”. The service product is a natural hand sanitizer made from lemongrass and betel leaves. The community was very enthusiastic about participating in this activity and promised to make their own later.
Adsorption of Congo Red onto Humic Acid Isolated from Peat Soil Gambut Regency, South Kalimantan Umaningrum, Dewi; Nurmasari, Radna; Santoso, Uripto Trisno; Astuti, Maria Dewi; Pradita, Hapsari Tyas
Molekul Vol 18 No 2 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.2.8685

Abstract

Humic acid is one of the green materials for wastewater treatment including for removal dyes as an adsorbent. Humic acid was isolated from peat soil, Gambut Regency, South Kalimantan following International Humic Substances Society method, and used to adsorb Congo red. The adsorption process was carried out in a batch system and the effect of pH, contact time, and adsorption capacity of Congo red on humic acid were studied. The adsorbent characterization by using FTIR. The results showed that the adsorption of Congo red on humic acid occurred at the optimum pH of pH 6, the optimum contact time was 120 minutes. The adsorption capacity of Congo red onto humic acid of 33.33 mg/g and follows the Langmuir model with R2 = 0.9926. The characterization of humic acid functional groups before and after adsorption of Congo red showed that the signal at 1,712.79 cm-1 were shifted to 1,705.07 cm-1 and 1,273.02 cm-1 were shifted to 1,265.30 cm-1. These suggested that the mechanism interaction was the electrostatic interaction between -NH3+ functional group of Congo red group and -COO- functional group of humic acid. It means that humic acid isolated from peat soil could be used as an adsorbent for the removal Congo red.
Variation of Iodine Mass and Acetylation Time On Cellulose Acetate Synthesis From Rice Straw Umaningrum, Dewi; Astuti, Maria Dewi; Nurmasari, Radna; Hasanuddin, Hasanuddin; Mulyasuryani, Ani; Mardiana, Diah
Indonesian Journal of Chemical Research Vol 8 No 3 (2021): Edition for January 2021
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2021.8-dew

Abstract

Cellulose acetate is a membrane material that can be used in the sensor field. One source of cellulose acetate is from rice straw. This study aimed to study the effect of iodine mass and acetylation time on cellulose acetate synthesis from rice straw. The initial step is to isolate cellulose from rice straw, followed by cellulose acetate synthesis using iodine catalyst by varying the amount of iodine as much as 0.1-0.3 grams and acetylation time for 1 until 5 hours. The cellulose acetate was characterized using an infrared spectrophotometer, and its viscosity was determined. The result shows that the cellulose 33.63%. The maximum time of cellulose acetate acetylation is 2 hours with a mass of iodine 0.2 g. The yield of cellulose acetate was 14.98%, with an acetyl value of 19.11% and a degree of substitution of 0.89. The cellulose acetate produced has a low viscosity. The FTIR characterization of cellulose acetate shows O-H functional groups at 3333 cm-1, C-H functional groups at ​​2897 cm-1, carbonyl functional groups at 1722 cm-1 C-O functional groups at 1029 cm-1 that were identical in cellulose acetate compounds. The amount of iodine and the acetylation time affected the cellulose acetate product.
Pelatihan GLP (Good Laboratory Practice) dan K3 (Kesehatan dan Keselamatan Kerja) di MAN 2 Hulu Sungai Selatan Kalimantan Selatan Idris, Muddatstsir; Sanjaya, Rahmat Eko; Yunus, Rahmat; Umaningrum, Dewi; Sunardi, Sunardi; Santoso, Uripto Trisno; Irwan, Azidi; Istikowati, Wiwin Tyas
Jurnal Pelayanan dan Pengabdian Masyarakat (Pamas) Vol 9, No 2 (2025): Jurnal Pelayanan dan Pengabdian Masyarakat (PAMAS)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM Universitas Respati Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52643/pamas.v9i2.5913

Abstract

Laboratorium ilmu pengetahuan alam (IPA) seperti labotarorium kimia, fisika, dan biologi merupakan laboratorium dengan risiko tinggi dan memerlukan pengelolaan yang baik agar kegiatan di laboratorium dapat berjalan dengan lancar dan aman. Penerapan GLP (Good Laboratory Practice) dan K3 (kesehatan dan keselamatan kerja) di laboratorium berperan penting dalam meminimalkan risiko dan kecelakaan kerja di laboratorium. Olehnya itu, tujuan kegiatan pelatihan ini adalah memberikan pemahaman terhadap guru, pengelola laboratorium dan siswa mengenai pentingnya penerapan GLP dan K3 di laboratorium. Metode yang digunakan untuk memberikan pemahaman kepada guru, pengelola laboratorium, dan siswa kelas XII MAN 2 Hulu Sungai Selatan (HSS) adalah pemaparan materi di kelas. Berdasarkan hasil kuesioner yang dibagikan, peserta memberikan respon yang positif terhadap kegiatan ini dan memiliki pemahaman yang baik terkait GLP dan K3 setelah mengikuti pelatihan. Kegiatan ini dapat mewujudkan GLP dan K3 di laboratorium sehingga praktikum, penelitian, dan pengabdian pada masyarakat dapat berjalan dengan aman dan lancar. Kata Kunci: Good Laboratory Practice, Kesehatan dan Keselamatan Kerja, Laboratorium
Co-Authors A.A. Ketut Agung Cahyawan W Abdullah Abdullah Ade Mutia Rahmah Ahmad Budi Junaidi Amelia Harianti Ani Mulyasuryani Ari Wahyudi Azidi Irwan Bambang Rusdiarso Budi Junaidi, Budi Dahlena Ariyani Diah Mardiana Diah Mardiana Dwi Nurwijayanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Siswanta Eka Yuliyanti Hasanuddin Hasanuddin Hermin Sulistyarti Idris, Muddatstsir Ika Kusuma Nugrahaeni Ika Kusuma Nugraheni Isnani Yuniarti Kamilia Mustikasari Mardhatillah Mardhatillah Maria Dewi Astuti Noer Komari Pradita, Hapsari Tyas Radna Nurmasari Rahmat Eko Sanjaya Rahmat Yunus Rahmat Yunus Raihanah Raihanah Raihanah Raihanah Resna Maulia Rodiansono Rodiansono Seniwaty Seniwaty Sri Juari Santosa Sunardi Sunardi Syana Asri Nurmuhaimina Taufiqur Rohman Umi Baroroh Lili Utami Uripto Trisno Santoso Utami Irawati Wiwin Tyas Istikowati Yunitawati Yunitawati