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Karnila, Rahman Karnila
Universitas Riau
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CHARACTERISTICS OF CARAGENAN FROM RED SEAWEED (RHODOPHYTA) Eucheuma spinosum AND Eucheuma cottonii ORIGINATING FROM MORO ISLAND Siregar, Ika Darmila; Diharmi, Andarini; Karnila, Rahman
Asian Journal of Aquatic Sciences Vol. 8 No. 3 (2025): December
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.8.3.410-418

Abstract

Red seaweeds Eucheuma spinosum and E. cottonii are raw materials for producing carrageenan. Carrageenan is a group of polysaccharides widely used as thickening, stabilizing, and gelling agents across various industries. This study aims to determine the physicochemical characteristics of carrageenan from E. spinosum and E.cottonii seaweed. This research uses an experimental method: direct extraction with hot alkali, with three repetitions. The physicochemical parameters analyzed include yield, gel strength, viscosity, water content, ash content, and sulfate content. The results of the study of the physicochemical characteristics of carrageenan from E. spinosum raw materials produced a yield of 34.41%, gel strength 22.17 g/cm2, viscosity 1450 cP, water content 11.57%, ash content 24.41%, and sulfate content 24.89%. The results of the study of the physico-chemical characteristics of E. cottonii produced a yield of 29.54%, gel strength of 488.58 g/cm2, viscosity of 30.05 cP, water content of 9.95%, ash of 36.42%, and sulfate content of 21.42%. The FTIR profiles of E. spinosum carrageenan compounds show iota carrageenan, and those of E. cottonii carrageenan compounds show kappa carrageenan. The physicochemical characteristics of E. spinosum and E.cottonii carrageenan raw materials have met FAO standards, except for gel strength and ash content in E. cottonii carrageenan.
PEMANFAATAN EKSTRAK DAUN KETAPANG (Terminalia catappa L.) SEBAGAI HERBISIDA ALAMI DALAM PERSPEKTIF ILMU LINGKUNGAN (EKOLOGI, SOSIAL, DAN EKONOMI) UNTUK MENDUKUNG PERTANIAN BERKELANJUTAN Iga Azalia Lamonda; Tengku Nurhidayah; Rahman Karnila
JURNAL SENPLING MULTIDISIPLIN INDONESIA Vol 3, No 2 (2025)
Publisher : Pelantar Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/jsmi.v3i2.36

Abstract

The intensive use of chemical herbicides in agriculture has caused serious impacts on the environment, human health and ecosystem sustainability. These impacts include soil, water, and air pollution, as well as health risks due to exposure to hazardous active ingredients. As a solution, this study examines the potential of ketapang (Terminalia catappa L.) leaf extract as an environmentally friendly organic herbicide. The content of allelochemical compounds in ketapang leaves is proven to effectively inhibit weed growth, and is safer and more economical than synthetic herbicides. Thus, ketapang extract herbicide is considered to have high prospects as an alternative weed control that supports sustainable agriculture. This study aims to identify the optimal formulation and concentration of natural herbicides of ketapang leaf extract in suppressing weed growth, analysing the percentage of live, height, number of shoots, wet weight, and dry weight of weeds. The research was conducted at UNRI Gobah Campus and the author's house in Pekanbaru. The environmental aspects used 4 x 2 factorial RAL with 3 replications, factors of herbicide concentration (Gramoxone, ketapang extract 25%, 50%, 75%) and weed species (Cynodon dactylon L. and Cyperus rotundus). Data were analysed with variance analysis and 5% Duncan test. The results showed that the 75% concentration of ketapang leaf extract herbicide was effective in suppressing weed growth and could replace chemical herbicides still used by farmers, although the effect was not as fast as chemical herbicides in killing weeds. Especially on the percentage of live weeds, weed height, and weed species. The interaction between ketapang leaf extract herbicide and weed type was effective in suppressing weed growth but not on wet weight and dry weight of weeds. The use of ketapang leaf extract is more recommended because it can be used as an alternative to replace the use of chemical herbicides that are environmentally friendly and safe for health
POTENSI EKSTRAK BERUNOK (Paracaudina australis) SEBAGAI ANTIOKSIDAN,INHIBITOR α-GLUKOSIDASE DAN ANTI-KOLESTEROL Sirait, Putriana Sari; Fikri, Muhammad Zakiyul; Sukmiwati, Mery; Karnila, Rahman; Pandiangan, Daniel Siandico; Putri, Adinda Herlina
Marinade Vol 9 No 01 (2026): April, 2026
Publisher : Fisheries Product Technology Department, Faculty of Marine Science and Fisheries, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/vtvb9059

Abstract

Paracaudina australis (Berunok) merupakan organisme laut yang memiliki prospek sebagai sumber metabolit bioaktif, meskipun kajian ilmiah terkait potensi antioksidan, penghambatan enzim α-glukosidase, dan kemampuan menurunkan kolesterol masih sangat minim. Studi eksploratif awal ini dirancang untuk mengkaji kemampuan ekstrak teripang berunok dalam menghambat radikal bebas, aktivitas α-glukosidase, serta efek hipokolesterolemik secara in vitro dengan memanfaatkan sistem pelarut bertingkat polaritas. Tahapan persiapan sampel dan proses ekstraksi menggunakan tiga jenis pelarut yaitu metanol, etil asetat, dan n-heksan, diikuti dengan identifikasi metabolit sekunder serta pengujian kapasitas antioksidan melalui metode DPPH, uji hambatan terhadap α-glukosidase, dan evaluasi aktivitas anti-kolesterol. Analisis fitokimia menunjukkan keberadaan senyawa steroid/terpenoid pada seluruh fraksi pelarut yang digunakan, sementara metabolit saponin hanya terdeteksi pada fraksi metanol. Kapasitas penangkapan radikal bebas tertinggi ditunjukkan oleh ekstrak metanol dengan IC₅₀ mencapai 223,37 ppm, mengungguli ekstrak etil asetat (414,63 ppm) dan n-heksan (626,56 ppm). Meskipun demikian, seluruh ekstrak teripang berunok menunjukkan kemampuan yang belum optimal dalam menginhibisi 50% aktivitas αglukosidase, namun pada konsentrasi 1000 ppm, ekstrak metanol masih menunjukkan inhibisi sebesar 4,12±0,40%. Untuk aktivitas anti-kolesterol, ketiga sampel memperlihatkan efektivitas dengan ekstrak metanol sebagai yang paling unggul dengan nilai 44,83±0,99 mg/mL.
Pemanfaatan Limbah Lumpur (Sludge) Hasil Eksplorasi Minyak Bumi Sebagai Bahan Baku Pupuk Organik Nindy Daviny; Tengku Nurhidayah; Rahman Karnila; Budijono; Dhea Oktama Rivaldo
Jurnal Pendidikan Indonesia Vol. 6 No. 5 (2025): Jurnal Pendidikan Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/japendi.v6i5.7853

Abstract

Limbah sludge dari industri minyak bumi menimbulkan masalah lingkungan akibat penimbunan. Inovasi diperlukan untuk mengubahnya menjadi pupuk kompos bernilai ekonomi, dengan memanfaatkan kulit nanas sebagai sumber nutrisi dan pendegradasi polutan. Penelitian ini bertujuan untuk mengetahui potensi sludge sebagai pengganti tanah dalam kompos berbasis kulit nanas, dengan parameter pH dan suhu sesuai SNI. Penelitian ini menggunakan metode kuantitatif-deskriptif dengan 12 komposter (4 perlakuan rasio sludge-tanah: 0:8, 2:6, 4:4, 6:2 kg) selama 12 minggu. Data pH dan suhu dianalisis dengan regresi linear. Semua komposter memenuhi standar pH (SNI 7763:2018) pada minggu ke-8 dan ke-12, serta suhu (SNI 19-7030-2004) pada minggu ke-4, -8, dan -12. Sludge mempercepat kenaikan pH dan menstabilkan suhu. Penelitian membuktikan sludge minyak bumi dapat dijadikan bahan kompos ramah lingkungan, dengan rekomendasi optimasi komposisi, uji logam berat, dan integrasi teknologi seperti vermicomposting untuk penelitian selanjutnya.
Co-Authors ', Dahlia ', Desmelati Afriadi Sinaga Ainiwati Ainiwati Anak Agung Istri Sri Wiadnyani Anda rini Diharmi Andarini Diharmi Andri Hendrizal Andriani, Andarini Anggito Naibaho Angraika Dirta Ani Karmila Anindinda Prameswari Hastiza Anisa Anastasia Yunus Annisa Sharah Antonius Zulqaiman Aras Mulyadi Asfi, Widya Mustika Auladi, Asyik Ayu Agustina Bayhakki Bayhakki Bella Andita Anggreini Bintal Amin Bintang, M. Irwan Sapta Purna Budijono, Budijono Bunga M.W Bunga M.W Bustari Hasan Cindytia Prastari Dahlia Dahlia Deddy Purnama Defri Ilham Desmelati ' Desmelati Desmelati Desmelati Desmelati Desnizarianti ' Devi Meri Yati Dewi Trisnawati Dewita Dewita Dewita Dewita Dhea Oktama Rivaldo Dian Iriani Dian Maulidawati Dini Fitri Edis Edis Edison ' Edison Edison Edison Edison Edison Edison Edison Edison Efriyeldi, Efriyeldi Ega Aryanda Putra Eko Prianto, Eko Elda Nazriati Endang Sulistya Ningsih, Endang Sulistya Eni Sumiarsih Esfi Girsang Esy Maryanti Fadhlami, Putri Insani Fajar Syukron Faradini Faradini Fatma Eka Putri Febrigusni, Audia Febrina Tumangger Feliatra Ganda Aliem Pakarsya Lubis Ghazali, Tengku Muhammad Gianthi, Fiskia Gita Amelia Gusti Putra Yunius Henni Syawal Heriansyah, Ivan Heriansyah, Ivan Hilyati Fadhlah Iga Azalia Lamonda Ika Darmila Siregar Indah Khairunnisa Indra Muhammad Ridwan Intan Elisa Irvan Irvan Ismulyati Ismulyati Ismulyati, Ismulyati Jamal Basmal Jayanti, Tinneke Dwi Jeremy Chrisdwi Putra Hutajulu Jhosua Fransiskus Kartika Dewi Kembaren, Bella Billiant J Ananta Lesi Kurnia Putri M Irwan Sapta Purna Bintang M Lamudin Noor M. Alhadid M. Alhadid MADE ASTAWAN Mery Sukmiwati Mery Sukmiwati Mhd Asrel Ahmad Mirna Ilza Mirna Ilza Mirna Liza Moh Wahbi Mubarak Mubarak Muhammad Raihan Muhammad Zakiyul Fikri Munisatul Haq Muslihul Makrif N. Ira Sari Nadia Adilla Nadia Mahardika Nasib Naibaho, Nasib Nindy Daviny Nintha Pratiwi Nittaya Chaiyanate, Nittaya Nofrizal Nofrizal Nofrizal Nofrizal Nur Azima Nur Wahid, Nur Pandiangan, Daniel Siandico Putra, Harifa Syah Putra, Muhammad Ridho Putri, Adinda Herlina Putri, Dea Arsifah Putri, Fatma Eka PUTRIANA SARI SIRAIT Rachmiwati Yusuf Radian Saputra Ramadhani, Nuzul Ria Rana Salma Ridwan Manda Putra Rifati Hanifa Rivaldo, Dhea Oktama Riwanda, Wahyu Rokhimin Rokhimin Rommy Novrihansa Ronal Kurniawan Rony Setyawan Rovilah, Kanza Roy Susanto Rozi Rudy R Nitibaskara Sam Herodian Saparudi Saparudi Sayyidina Ahmad Zhariif Selamat ariyadin Septia Murni, Septia Septin Alvin Mendrofa Shabrina Nur Fakhriah Sholihah, Aulia Putri Sidauruk, Shanty Wisuda Siregar, Ika Darmila Siregar, Riri Andriani Siti Humairah Suardi Loekman Sukarno Sukarno Sukendi Sukendi Sukirno Mus Sulistiana Pramita Nosa Sumarto Sumarto Sumarto Sumarto Sumarto, Sumarto Suparmi ' Suparmi Suparmi Suyanto Suyanto Syafruddin Nasution Syahrul Syahrul Syamsiar, Syamsiar Tedy Kamal Sumannag Tengku Muhammad Ghazali Tengku Muhammmad Ghazali, Tengku Muhammmad Tengku Nurhidayah Teresia Br Ginting Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Tia Novita Laili Tika Oktasari Tjipto Leksono Tri Ayu Ningsih Triatma Putri Tutik Wresdiyati Usman Muhammad Tang USMAN PATO Vran Orlando Josua Wahbi, Moh Wahyu Riwanda Widiyanto, Rifki Rahma Wikky Aditiya Putra Wikky Aditiya Putra Windi Ayu Maltadevi Winona Oktania Abriestina Yuliana Yuliana Yusmaida Yusmaida Yusni Ikhwan Siregar yusri munthe yyusmarni yyusmarni Zahtamal Zahtamal Zakiah Zakiah Zulfan Saam