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All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan El-Barka: Journal of Islamic Economics and Business Jurnal Agristan Jurnal Riset Agama International Journal of Science and Environment Agridev Journal : Agribusiness Digitalization & Community Development International Journal of Learning Media on Natural Science
Rahmawati, Rahmi
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Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Industrial & Manufacturing Engineering Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Veterinary Other

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Optimisasi Tekanan dan Nisbah Refluks pada Pemurnian ∆-Guaiena Minyak Nilam (Pogostemon cablin) secara Distilasi Fraksional Rahmi Rahmawati; Sarifah Nurjanah; Efri Mardawati
Jurnal Ilmu Pertanian Indonesia Vol. 27 No. 4 (2022): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.27.4.614

Abstract

Patchouli oil is one of Indonesia's important essential oils as an export commodity. Δ-Guaiene is one of the terpenes in the oil, which is shown to have antimicrobial activity against some fungi and bacteria. Thus, the production of δ-guaiene needs to be optimized. This study aims to determine the appropriate pressure and reflux ratio for the fractional distillation process that isolates the highest δ-guaiene content. The experiment used the response surface method. The pressure of the fractional distillation process and reflux ratio were: 1;10; 20 mmHg; and 5:1; 20:1; 35:1. The temperature ranged from 270‒272°C. Various pressure did not give different yields, except at a pressure of 1 mmHg that resulted in 4% yield and δ-guaiene content of 20.46%; both conditions were optimum. The δ-guaiene was characterized for the density, refractive index, distillate formation rate, distillation time, residual mass, and electrical energy requirements, which were 0.9519, 1.5027, 4 mL/min, 1 minute, 6.31 g, and 6.0477 kW/h, respectively. The lower the reflux ratio, the faster the distillation process; the faster the processing time, the lower the energy requirement; and the higher the ratio of reflux, the purer the percentage of the δ-guaiene. The optimum process was reached as the reflux ratio was lower, where the yield and δ-guaiene content were the highest, and the processing time was faster. Keywords: δ-guaiene, fractional distillation, patchouli oil, reflux pressure, RSM
Integrasi Teknologi Pengolahan Hasil Pertanian dan Manajemen Sumber Daya Manusia: Strategi Pengembangan CV. Essentialle Harum Alami Rahmawati, Rahmi; Indrianingsih, Rohayati Suci; Hidayat, Tita Nurmalinasari; Sopiawadi, Mutqi
AgriDev Vol. 3 No. 2 (2025)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33830/Agridev.v3i2.11448.2025

Abstract

Integrasi teknologi pengolahan hasil pertanian dan manajemen sumber daya manusia (MSDM) sangat penting untuk meningkatkan daya saing usaha kecil dan menengah (UKM). Penelitian ini berfokus pada CV. Essentialle Harum Alami, sebuah perusahaan yang bergerak di bidang produk minyak atsiri. Metode penelitian yang digunakan adalah studi kasus dengan pendekatan deskriptif kuantitatif, dan data dianalisis menggunakan teknik IFE/EFE, SWOT, dan AHP. Penelitian mengidentifikasi langkah strategis untuk meningkatkan efisiensi produksi, kualitas produk, dan daya saing pasar. Hasil penelitian menunjukkan bahwa peningkatan fasilitas dan infrastruktur produksi untuk memenuhi standar ekspor, adopsi teknologi produksi dan pengemasan skala komersial yang tepat, serta pengembangan program pelatihan karyawan merupakan langkah kunci untuk pertumbuhan berkelanjutan. Selain itu, penguatan kerja sama dengan pemangku kepentingan dan perluasan promosi akan membantu meningkatkan jangkauan pasar dan membangun citra merek yang kuat. Studi ini menekankan bahwa penyelarasan strategi tersebut dengan tren global yang mendukung produk ramah lingkungan memberikan manfaat jangka panjang bagi perusahaan dan komunitasnya. Integrasi teknologi dan MSDM menjadi faktor utama dalam pengembangan agroindustri yang kompetitif dan berkelanjutan.
Macroeconomic Variables and Profitability in the Indonesian Islamic Banking Industry Al Arif, Mohammad Nur Rianto; Rahmawati, Rahmi
El-Barka Journal of Islamic Economics and Business Vol. 4 No. 1 (2021)
Publisher : El-Barka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21154/elbarka.v4i1.2778

Abstract

Profitability level is one of performance indicator in banking industry, including the Islamic banking industry. The purpose of this study is to analyse the short-run and long-run impact of macroeconomics variables to profitability in the Indonesian Islamic banking industry. The method that used in this paper is vector error correction models (VECM). The variables that used in this paper are industrial production index, inflation, exchange rate, the Bank Indonesia’s rate, and stock exchange composite index. The result shows that in the long-run, all of the macroeconomics variables affect significantly in profitability level. In the short-run, all macroeconomics variables do not  impact the profitability. This result implies that the macroeconomics variable had a time-lag to affect the profitability in the Indonesian Islamic banking industry. Salah satu indikator kinerja dalam industri perbankan termasuk industri perbankan syariah adalah tingkat profitabilitas. Tujuan dari penelitian ini ialah untuk menganalisis pengaruh variabel makroekonomi terhadap profitabilitas di industri perbankan syariah, baik dalam jangka pendek maupun jangka panjang. Metode yang dipergunakan dalam artikel ini ialah model vektor koreksi kesalahan. Variabel yang dipergunakan ialah indeks produksi industri, inflasi, nilai tukar, tingkat bunga Bank Indonesia, dan indeks harga saham gabungan. Hasil penelitian menunjukkan bahwa seluruh variabel makroekonomi berpengaruh dalam jangka panjang terhadap tingkat profitabilitas. Sedangkan, dalam jangka pendek seluruh variabel makroekonomi tidak berpengaruh terhadap tingkat profitabiltas. Hasil ini memberikan implikasi bahwavariabel makroekonomi memiliki jeda waktu untuk memengaruhi tingkat profitabilitas pada industri perbankan syariahdi Indonesia.
MINAT PEMBELIAN SAYUR MELALUI E-COMMERCE DI KABUPATEN PURWAKARTA Indrianingsih, Rohayati Suci; Hidayat, Tita Nurmalinasari; Rahmawati, Rahmi
Jurnal Agristan Vol 7, No 1 (2025): Jurnal Agristan
Publisher : Jurusan Agribisnis, Fakultas Pertanian, Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/agristan.v7i1.14460

Abstract

E-commerce menjadi tren yang memberikan kemudahan bagi konsumen dalam berbelanja termasuk belanja produk pertanian seperti sayuran. Meskipun sudah tersedia kemudahan dengan adanya teknologi dalam kegiatan jual beli berupa e-commerce, masih banyak konsumen yang belum memanfaatkannya dalam memenuhi kebutuhannya akan sayuran. Penelitian ini bertujuan untuk menganalisis minat pembelian konsumen terhadap sayur melalui e-commerce serta faktor yang mempengaruhinya. Penelitian dilaksanakan di Kabupaten Purwakarta bulan Desember 2024 – Januari 2025. Pendekatan kuantitatif digunakan dalam penelitian ini dengan menggunakan metode survei. Pengambilan sampel ditarik menggunakan metode insidental dengan ukuran sampel 100. Data yang diperoleh dianalisis menggunakan analisis deskriptif kuantitatif dan analisis regresi linier berganda. Hasil penelitian menunjukkan bahwa minat pembelian konsumen terhadap sayur melalui e-commerce termasuk pada kategori sedang. Persepsi harga dan persepsi kualitas memberikan pengaruh signifikan terhadap minat pembelian konsumen baik secara simultan maupun secara parsial.
Peran Qanaah dalam Mengatasi Masalah Ekonomi Rumah Tangga Rahmawati, Rahmi; Mulyana, Mulyana; Adnan, Adnan
Jurnal Riset Agama Vol. 2 No. 2 (2022): August
Publisher : Fakultas Ushuluddin UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jra.v2i2.16981

Abstract

This research aims to discuss the role of qanaah attitude in dealing with household economic problems based on the perspective of the idrisiyyah order's prosperous family development institution. This research uses qualitative research methods where the resulting source comes from observations and interviews and literature related to research. The results of this study give the understanding that qanaah is a form of gratitude for the efforts that have been made to pick up sustenance. In addition, qanaah is also interpreted as an attitude of acceptance towards all destiny and decrees from Allah Swt., and still accompanied by still trying and trying to get what we need. The Prosperous Family Development Institute is a container in which there are coaching programs as a form of service to pilgrims who want or are married.  LPKS provides guidance on how to become a human being who has good morals and provides tips on how to be a good household. As for the conclusion that can be drawn, the role of qanaah in dealing with economic problems in the household is very important, because with qanaah humans will always feel enough with what they have received so that it will minimize conflicts that occur in the household due to the absence of demands from both sides. This research recommends the importance of understanding and applying qanaah attitudes in family life in order to create a harmonious family.
Creating An Environmentally Literacy Oriented E-Magazine on Household Waste Materials Rahmawati, Rahmi; Sukmawardani, Yulia; Aisyah, Riri
International Journal of Learning Media on Natural Science (IJLENS) Vol. 1 No. 1 (2024): Februari 2024
Publisher : CV. Generasi Intelektual Digital (GEN ID)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60005/ijlens.v1i1.21

Abstract

This study aims to describe the appearance, analysis of the results of the validation test and the analysis of the results of the feasibility test of e-magazine environmental literacy oriented on the topic household waste. This study uses the DBR (Design Based Research) method through the preliminary stages (analysis and deepening of the material), design (initial product manufacture), and development (validation test and feasibility test product). The resulting product is an e-magazine environmental literacy oriented on household waste material entitled "Household Waste Management". The validation test was carried out by three validators consisting of material expert lecturers and media experts. The average value of rcount of the validation test results for material, language and media display aspects is 0.87; 0.78; 0.89 which indicates that the e-magazine made is valid. Furthermore, a feasibility test was carried out on 20 students consisting of 10 students of chemistry education who were taking courses in waste management and treatment and 10 students outside of chemistry education who were randomly selected. The average value of the feasibility test results from the aspect of material, language and media display respectively is 97.00%, 97.50%; 95.00%. This shows that the emagzine environmental literacy oriented on the topic household waste that is made is declared very feasible to be used as a learning medium.
Exploration of Antifungal Tests Based on Δ-Guaiene From Subang Patchouli Oil Rahmawati, Rahmi; Nurjanah, Sarifah; Rialita, Tita; Mardawati, Efri; Filianty, Fitry
International Journal of Science and Environment (IJSE) Vol. 5 No. 3 (2025): August 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i3.194

Abstract

Guaiene is a derivative compound produced as a byproduct in the production of patchouli alcohol from patchouli oil (Pogostemon cablin Benth.). This study aims to evaluate the antifungal activity of δ-guaiene extracted from patchouli oil originating from Subang against four types of skin pathogenic fungi: Aspergillus niger, Candida albicans, Microsporum gypseum, and Trichophyton mentagrophytes. The method used was a laboratory experiment, with the main parameters observed including Inhibition Zone Diameter (IZD), Minimum Inhibitory Concentration (MIC), and Minimum Fungicidal Concentration (MFC). The results showed that δ-guaiene inhibited the growth of C. albicans at a concentration of 40%, with an IZD of 0.15 mm. Against A. niger, the compound demonstrated an inhibition zone of 1.4 mm at a 20% concentration and had an MFC of 20%. For T. mentagrophytes, an IZD of 0.4 mm was observed, with both MIC and MFC at 20%. Activity against gypseum showed an IZD of 0.25 mm, with MIC and MFC also at 20%. These findings suggest that δ-guaiene from patchouli oil has potential as a candidate antifungal agent derived from local resources, supporting the development of natural bioactive compounds and sustainability.
Pendampingan Pembuatan Nomor Induk Berusaha (NIB) untuk Meningkatkan Kualitas UMKM di Rancakandong, Sukamelang, Kabupaten Subang Rahmawati, Rahmi
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol. 9 No. 3 (2025): Vol. 9 No. 3, November 2025
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jss.v9i3.581

Abstract

Aspek legalitas usaha sangat penting dalam pengembangan Usaha Mikro, Kecil, dan Menengah (UMKM). Nomor Induk Berusaha (NIB) berfungsi sebagai identitas resmi yang diperlukan oleh pelaku usaha untuk mendapatkan izin usaha, izin komersial, atau operasional. Rendahnya minat masyarakat di Desa Sukamelang, Kecamatan Subang dalam mengurus NIB mendorong dosen Politeknik Negeri Subang untuk melaksanakan program pengabdian masyarakat. Program ini bertujuan untuk memberikan pendampingan kepada pelaku UMKM di Dusun Rancakandong, Desa Sukamelang, Kecamatan Subang dalam pembuatan akun dan pengurusan legalitas usaha melalui sistem Online Single Submission (OSS). Metode yang digunakan meliputi tiga tahap: survei awal untuk memahami kebutuhan UMKM, penyuluhan tentang manfaat dan prosedur pembuatan NIB, serta pendampingan intensif dalam proses pengajuan NIB. Dari beberapa UMKM yang terdapat di Desa Sukamelang, hanya satu yang berhasil mendapatkan NIB dan sertifikat legalitasnya. UMKM tersebut adalah usaha parfum berbahan minyak atsiri murni dengan merek "Khadz EDP." Program ini diharapkan dapat meningkatkan kesadaran pelaku UMKM akan pentingnya legalitas usaha untuk mendukung keberlanjutan dan pengembangan bisnis mereka.
Optimization of Bio-Additive Formulation Using Subang Citronellal, Clove, and Patchouli: Evaluation of Density, Power Output, and CO₂–O₂ Emissions Rahmawati, Rahmi; Aprilliani, Fenny; Muhammad Malikul Adil, Nur
International Journal of Science and Environment (IJSE) Vol. 5 No. 4 (2025): November 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.285

Abstract

This research examined the potential of essential oil–based bio-additives derived from citronella, clove, and patchouli to enhance the physicochemical properties, engine performance, and emission characteristics of Pertalite fuel. The study utilized Response Surface Methodology (RSM) with a Central Composite Design (CCD) to assess additive concentrations between 0.1 and 0.3 mL per liter of Pertalite. Findings indicated that these low-level additions did not significantly affect density, which remained similar to pure Pertalite. Likewise, power output and exhaust emissions (CO2 and O2) showed no notable improvements. Statistical evaluation using Design Expert® revealed all regression models were non-significant (p > 0.05), and optimization attempts failed to identify a valid optimum, with desirability values below 0.5. The minimal impact is attributed to the very low additive dosage, insufficient to influence atomization, combustion, or emission reduction. Additionally, gasoline’s non-polar nature limits sensitivity to parameters such as pH, while operational variations during engine testing (temperature, RPM, and load) may have masked minor effects. In summary, essential oil bio-additives at concentrations below 0.03% by volume are ineffective for measurable improvements. Future studies should investigate higher concentrations, purification of active compounds, improved blending techniques, and stricter engine testing protocols. The contribution of oxygenated compounds to combustion enhancement also merits further exploration.
Co-Authors Adnan Adnan Efri Mardawati Fenny Aprilliani Fitry Filianty Mohammad Nur Rianto Al Arif Muhammad Malikul Adil, Nur Mulyana Mulyana Mutqi Sopiawadi Riri Aisyah, Riri Rohayati Suci Indrianingsih Sarifah Nurjanah Tita Nurmalinasari Hidayat Tita Rialita Yulia Sukmawardani, Yulia