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All Journal EKSAKTA: Journal of Sciences and Data Analysis Science and Technology Indonesia Jurnal Abdimas Madani dan Lestari (JAMALI)
Amri Yahya
Chemistry Department, Universitas Islam Indonesia, Kampus Terpadu Jl. Kaliurang Km 14, Sleman, Yogyakarta, Indonesia.
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Environmental Science Materials Science & Nanotechnology Physics Other

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Microwave and Ultrasound Irradiations for the Intensification on Biodiesel Productions: a Mini Review Suresh Sagadevan; Amri Yahya; Is Fatimah
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 2, ISSUE 2, August 2021
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol2.iss2.art6

Abstract

This mini review discusses the roles of intensification process in biodiesel production. Due to the Twelve Principles of Green Chemistry as a foundation for sustainability, the shorter time and efficient energy consumption highlighted the use of microwave and ultrasound irradiation for increasing conversion of biodiesel.The principles and some examples for the process are exhibited. It can be summarized that the intensifications are important innovations, but some optimization and life cycle analysis are required in applicable scales.
PENGEMBANGAN POTENSI EKONOMI MELALUI PRODUKSI MENTOK PEDAGING DAN BEBEK PETELUR UNTUK MENINGKATKAN KESEJAHTERAAN MASYARAKAT Allwar; Yuni Nustini; Nevi Indriyani; Amri Yahya
Jurnal Abdimas Madani dan Lestari (JAMALI) Volume 04, Issue 01, Maret 2022
Publisher : UII

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jamali.vol4.iss1.art1

Abstract

Virus covid 19 telah menyebabkan tingkat pertumbuhan perekonomian Indonesia turun drastis atau berjalan sangat lambat. Hal ini di sebabkan oleh banyaknya tenaga kerja yang di rumahkan dan bahkan berhentikan sehingga minat jual dan beli kurang, tingkat pengangguran naik dan bahkan dapat menimbulkan peningkatan kriminalitas.  Permasalahan ini harus segera di carikan solusi supaya tingkat kemiskinan tidak bertambah. Salah satu metoda yang di lakukan adalah pemberdayaan masyarakat untuk meningkatkan perekonomia  yaitu dengan beternak bebek pedaging (mentok) dan bebek petelur dihalaman rumah. Mentok dan bebek petelur merupakan makanan yang banyak di gemari oleh masyarakat Yogyakarta karena banyak mengandung protein dan vitamin. Hal ini merupakan suatu peluang besar untuk pemberdayaan masyarakat dalam meningkatkan tingkat perekonomian. Program pemberdayaan ini dilakukan dengan kerjasama antara Direktorat Penelitian dan Pengabdian kepada Masyarakat Universitas Islam Indonesia (DPPM UII) dan Masyarakat mitra sebagai target program Pengabdian Kepada Masyarakat (PkM). Pemilihan mitra berdasarkan hasil survei yaitu Dusun Pandanpuro, Sleman, Yogyakarta. Program ini telah memberikan hasil yang sangat baik dimana Dusun Pandanpuro telah memiliki 2 (dua) mesin penetas telur dengan kapasitas masing masing 40 butir, peralatan pencacah sayuran dan buku panduan beternak serta menajemen kewirausahaan Tingkat keberhasilan mesin penetas telur mencapai 80 persen sehingga selama pengabdian  masyarakat target telah memiliki rata-rata 32 ekor mentok atau bebek petelur. Untuk keberlanjutan program ini maka mesin penetas telur di gilir kemasyarakat lain yang dikendalikan oleh ketua kelompok tani
Heterogeneous Catalytic Conversion of Citronellal into Isopulegol and Menthol: Literature Review Amri Yahya; Dwiarso Rubiyanto; Is Fatimah
Science and Technology Indonesia Vol. 6 No. 3 (2021): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1535.031 KB) | DOI: 10.26554/sti.2021.6.3.166-180

Abstract

The conversion of citronellal into isopulegol is a key route in the production of a number of important chemicals. In the perspective of green conversion, the use of a heterogeneous catalyst is superior due to its ease in separation and reusability, so it facilitates a highly economical conversion. In this review, we examine the use of some transition metals in cyclization reactions, which are suitable for citronellal conversion into isopulegol, and consider the potential progress in clay-based catalysts. The structure of clay which potentially provides the porosity by modification and supporting active metal is proposed to be the low-cost catalyst for the conversion. As other mechanism by porous materials-supported metal, the porosity of clay support contributes to conduct thesurface adsorption mechanism and the Broensted acid supply, meanwhile the metal acts as active site for cyclization, and in the one-pot conversion into menthol, as both cyclization and hydrogenation.
Biogenic Silica Extracted from Salacca Leaves Ash for The Adsorption of Salycilic Acid Is Fatimah; Faiha Ulfiyani Zaenuri; Lolita Narulita Doewandono; Amri Yahya; Putwi Widya Citradewi; Suresh Sagadevan; Won-Chun Oh
Science and Technology Indonesia Vol. 6 No. 4 (2021): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2021.6.4.296-302

Abstract

Extraction of biogenic silica from Salacca leaves ash and it’s utilization as adsorbent for salycilic acid has been successfully conducted. The caustic extraction by Refluxing the ash in NaOH followed by slow titration using acid produced the silica gel, and in order to evaluate the physicochemical character for adsorption purpose, the sintering of the dried gel was varied at 300, 400 and 500oC. Instrumental analysis of x-ray diffraction, scanning electron microscopy, gas sorption analysis, and Fourier transform infrared spectroscopy were employed. The kinetics of the salycilic acid adsorption was investigated in a batch adsorption system and the quantitative analysis was based on UV–Vis spectrometry. The results showed that the produced silica exhibited adsorption capability for salycilic acid in an aqueous solution. At varied sintering temperature, the highest adsorption capacity and affinity was achieved by temperature of 500oC, and the adsorption kinetics obeyed the Langmuir isotherm. The varied pH for adsorption suggested neutral pH is the most feasible compared to the acidic and basic conditions.
Co-Authors Allwar Allwar Dwiarso Rubiyanto Faiha Ulfiyani Zaenuri Is Fatimah Lolita Narulita Doewandono Nevi Indriyani Nustini, Yuni Putwi Widya Citradewi Suresh Sagadevan Suresh Sagadevan Won-Chun Oh