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All Journal VALENSI Jurnal Teknologi Pertanian Communications in Science and Technology Jurnal Abdimas Ilmiah Citra Bakti (JAICB) Jurnal Serambi Abdimas
Ari Asnani
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Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Physics Social Sciences

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Antioxidan activity of Sargassum duplicatum seaweed extract Septiana, Aisyah Tri; Asnani, Ari
Jurnal Teknologi Pertanian Vol 14, No 2 (2013)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (304.4 KB)

Abstract

Sargassum duplicatum contains bioactive compounds that potential as antioxidants. The aims of the research were to study the antioxidant activity of S. duplicatum’s extract obtained from solvent extraction by one-step extraction and multi-step extraction methods. Solvents used were hexanes, ethyl acetate, methanol, ethanol, and water. Antioxidant activity of extract was measured by analyzing the peroxide value, malonaldehide (MDA) from linoleic acid dan 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenger capacity. The result showed that the extract of S. duplicatum could inhibit linoleic acid oxidation and scavenge free radical. Antioxidant activity on linoleic acid of methanol extract from one-step extraction method was the highest, whereas antioxidant activity of ethanol and ethyl acetate extracts was not significantly different. Methanol extract from one step extraction could inhibit peroxide formation by 86.4%, and MDA formation by 77.5%. As reference, α tocopherol inhibited peroxide formation by 89.1% and MDA formation by 60.6%. The DPPH radical scavenger capacity of all extracts of S. duplicatum was lower than α tocopherol.  Activity of antioxidant of those extracts was closely related to their total phenolic content.Key words: Extraction, antioxidant, Sargassum duplicatum
Pelatihan Pembuatan Tas Ecoprint Sebagai Produk Ecoprint Siap Pakai Ari Asnani; Hartiwi Diastuti; Eva Vaulina Yulistia Delsy; Waluyo Handoko
Serambi Abdimas Vol 3 No 2 (2022): Jurnal Serambi Abdimas
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.sa.2022.3.2.7338

Abstract

Ecoprint adalah teknik mencetak dan mewarnai berbagai material serat alam menggunakan pewarna alami. Aplikasi teknik ecoprint pada kain serat alam selanjutnya dapat dibuat beragam tas sebagai pengembangan produk ecoprint siap pakai. Berdasarkan hal tersebut maka telah dilakukan kegiatan pengabdian kepada masyarakat berupa pelatihan pembuatan tas fashion berbasis kain ecoprint dengan mitra Edukasi Bruwun Alas, Patikraja, Banyumas. Tahapan kegiatan mencakup pembuatan kain ecoprint, pembuatan pola tas, dan pembuatan tas menggunakan kain ecoprint. Hasil kegiatan menunjukkan dampak positif dimana mitra mampu menghasilkan ecoprint pada media kain, pola tas, dan produk tas ecoprint. Lima ragam tas yang dihasilkan adalah tas pouch, tas selempang, tas tote bag, tas ransel, dan tas kotak. Hasil kegiatan ini diharapkan mampu berkontribusi positif terhadap pengembangan keragaman produk ecoprint siap pakai.
Two Sesquiterpenes from n-Hexane Fraction of Curcuma soloensis Rhizomes and Their Antimicrobial Activities Diastuti, Hartiwi; Asnani, Ari; Lestari, Puji; Astuti, Teni; Nurmalia, Naela; Hidayat, Ade Sholeh
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 1, May 2024
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i1.36613

Abstract

Curcuma soloensis is one of the medicinal plants that has the potential to be a source of bioactive compounds. The antimicrobial study of the bioactive compounds from C. soloensis was still limited. This study aimed to isolate the bioactive compounds from C. soloensis rhizomes and to evaluate their potential as antimicrobial agents. C. soloensis rhizome extraction was done using the maceration method with acetone and then fractionated with n-hexane: methanol (1:1). The compounds were separated and purified using vacuum liquid chromatography and radial chromatography. The structure of the isolated compounds was determined using the nuclear magnetic resonance (1H and 13C NMR) spectroscopy analysis and comparison with literature data. Antimicrobial activity assays of the extract, n-hexane fraction, and isolated compounds were carried out by microdilution methods against Escherichia coli, Staphylococcus aureus, Candida albicans, and Malaszezia furfur. Two bioactive compounds from the n-hexane extract of C. soloensis rhizome have been isolated: ar-curcumene and ar-turmerone. Antimicrobial test results on acetone extract, n-hexane fraction, and isolated compounds showed that ar-turmerone had the highest activity against S. aureus with a MIC value of 15.6 μg / mL. In comparison, ar-curcumene showed the same activity against all test microbes with a MIC value of 62.5 μg / mL.  This study showed that secondary metabolite compounds of C. soloensis rhizomes have the potential to be developed as antimicrobial agents.
Introduksi Mordan Aluminium Tri Format Untuk Proses Ecoprint Ramah Lingkungan di KWT Sekar Wana Banjarnegara Asnani, Ari; Erminawati, Erminawati; Yunanto, Ary
Jurnal Serambi Abdimas Vol 5 No 2 (2024): Jurnal Serambi Abdimas
Publisher : Universitas Jenderal Soedirman

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Abstract

Mordant adalah ion logam yang ditambahkan pada proses ecoprint yang berfungsi untuk meningkatkan pengikatan pewarna alami. Mordant yang umum dipakai adalah tawas yang berbasis ion aluminium. Namun tawas memiliki kelarutan yang rendah sehingga bahan mordant yang tidak larut berpotensi mencemari lingkungan. Untuk itu diperkenalkan mordant morang berbasis ion alumnium dalam bentuk Aluminium Tri Format (ATF) yang lebih ramah lingkungan karena larut sempurna dalam air pada suhu ruang. Ion format berlebih juga bersifat biodegradable sehingga lebih ramah lingkungan. Berdasarkan hal tersebut maka telah dilakukan kegiatan pemberdayaan masyarakat berupa introduksi mordant ATF yang ramah lingkungan untuk proses ecoprint di KWT Sekar Wana, Banjarnegara. Hasil kegiatan menunjukkan dampak positif dimana mitra mampu menghasilkan ecoprint dengan proses mordanting pada suhu ruang (hemat energi), sisa mordant dapat digunakan kembali hingga habis (hemat biaya), sehingga tidak ada mordant yang terbuang ke lingkungan. Lebih lagi, lebihan asam format bersifat biodegradable sehingga ramah lingkungan. Hasil produk ecoprint cenderung berwarna lebih terang karena suasana asam yang dihasilkan dari penggunaan mordant ATF. Kegian ini diharapkan mampu berkontribusi positif terhadap aplikasi teknik ecoprint yang ramah lingkungan.
PEMANFAATAN PEWARNA ALAMI DALAM PRODUKSI KERTAS DAUR ULANG DI BANK SAMPAH SRAYAN MAKARYA Asnani, Ari; Diastuti, Hartiwi; Delsy, Eva Vaulina Yulistia; Handoko, Waluyo
Jurnal Abdimas Ilmiah Citra Bakti Vol. 6 No. 2 (2025)
Publisher : STKIP Citra Bakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38048/jailcb.v6i2.4707

Abstract

Bank Sampah (BS) Srayan Makarya beroperasi dengan menerima sampah atau mengambil sampah dari anggotanya. Limbah kertas tergolong tinggi karena kertas merupakan bahan yang sangat umum digunakan dalam berbagai aktivitas dan kehidupan sehari-hari. Untuk mengatasi penumpukan limbah kertas, maka dilakukan kegiatan pengabdian kepada masyarakat dengan tujuan pengolahan limbah kertas menjadi kertas daur ulang, difusi teknologi ekstraksi pewarna alami, serta aplikasi pewarna alami untuk pewarnaan kertas daur ulang. Mitra kegiatan abdimas adalah para anggota BS Srayan Makarya yang berdomisili di Bobosan, Purwokerto Utara, Jawa Tengah. Pelaksanaan kegiatan meliputi sosialisasi, pelatihan pembuatan kertas daur ulang, demonstrasi ekstraksi pewarna alami, pelatihan aplikasi pewarna alami untuk pewarnaan kertas daur ulang, praktek mandiri, dan evaluasi kegiatan melalui pre-test dan post-test. Pembuatan kertas daur ulang menggunakan limbah kertas HVS, kertas buram, kertas folio bergaris, dan kardus bekas. Pewarna alami yang digunakan adalah ekstrak aqueous dari daun ketapang, daun rengat, kayu tingi, dan kayu secang. Hasil kegiatan adalah produk kertas daur ulang dengan pewarna alami. Hasil evaluasi kegiatan menunjukkan peningkatan pengetahuan peserta terkait alat (100%), bahan (100%), dan prosedur pembuatan kertas daur ulang (100%). Hasil evaluasi peminatan menunjukkan bahwa sebagian besar peserta (41,7%) melakukan kegiatan untuk meningkatkan pengetahuan dan ketrampilan, sedangkan yang berminat untuk berwirausaha kertas daur ulang sebanyak 33,3%. Aplikasi pewarna alami pada pembuatan kertas daur ulang di BS Srayan Makarya dapat memicu kreativitas mitra untuk mengolah limbah kertas menjadi produk fungsional yang bernilai ekonomi.
Modification of Ag3PO4 surface using a nanosilver solution prepared under sunflower seed extract Azmi, Vania Amelia; Sulaeman, Uyi; Larasati, Rini; Hermawan, Dadan; Asnani, Ari; Isnaeni, Isnaeni; Yin, Shu
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1642

Abstract

Designing new properties of Ag3PO4 photocatalysts is challenging as the Ag3PO4 surface is highly susceptible to photocorrosion. This study aims to improve the properties of Ag3PO4 by modifying its surface using a nanosilver solution prepared under sunflower seed extract. This photocatalyst was prepared by chemical coprecipitation. Based on XPS analysis, the interaction of nanosilver solution with the Ag3PO4 surface significantly affected the P 2p chemical state and decreased the Ag/P atomic ratio of Ag3PO4. The modification of the Ag3PO4 surface by nanosilver solution resulted in the formation of silver vacancy defects and the incorporation of Ag nanoparticles (AgNPs) on the Ag3PO4 surface. This new design of Ag3PO4 showed a remarkable photocatalytic reaction for Rhodamine B oxidation and antibacterial activity under blue light irradiation. The photocatalytic reaction was mainly driven by forming superoxide anion radicals and hole species. This phenomenon can provide a new direction in the improvement of the photocatalytic ability of Ag3PO4 through a natural plant material approach.
Co-Authors Aisyah Tri Septiana ary yunanto Astuti, Teni Azmi, Vania Amelia Dadan Hermawan, Dadan Erminawati erminawati Eva Vaulina Yulistia Delsy Eva Vaulina Yulistia Delsy Hartiwi Diastuti Hartiwi Diastuti Hidayat, Ade Sholeh Isnaeni Isnaeni Larasati, Rini Nurmalia, Naela PUJI LESTARI Sulaeman, Uyi Waluyo Handoko Waluyo Handoko Yin, Shu