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Pencirian Kopi Robusta Bengkulu dari Kemungkinan Bahan Pencampur Menggunakan Kombinasi Spektroskopi FTIR dan Kemometrik Deni Agus Triawan; Ghufira Ghufira; Morina Adfa; Mohamad Rafi
agriTECH Vol 42, No 4 (2022)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.64432

Abstract

Penelitian ini bertujuan untuk mengidentifikasi kemurnian kopi bubuk yang beredar di pasaran Kota Bengkulu menggunakan kombinasi spektroskopi FTIR dan teknik kemometrik guna autentifikasi dan kontrol mutu kopi bubuk. Desain penelitian dibuat dengan variabel berupa kopi murni, jagung roasted dan beras roasted, kopi campur jagung roasted (50% b/b), jenis kopi campur beras roasted (50%b/b) dan 18 sampel kopi komersial. Masingmasing variabel tersebut dibuat 3 kali pengulangan. Berdasarkan hasil spektrum FTIR dari kopi murni, jagung roasted dan beras roasted diketahui bahwa terdapat pola spektrum yang hampir mirip dan sulit dibedakan. Analisis PCA dengan bantuan program Unscrambler X menunjukkan nilai PC-1 dan PC-2 yang dapat mendeskripsikan 97% dari total varians (PC-1 = 91%; PC-2 = 6%). Berdasarkan PC-1, kopi murni berada pada sisi positif sedangkan bahan pencampur berupa jagung dan beras berada pada sisi negatif. Plotting sampel kopi komersial pada kopi murni dan kopi dengan campuran beras roasted maupun jagung roasted diperoleh nilai PC-2 dan PC-1 sebesar 95% (PC-1 = 87%; PC-2 = 8%). Dari plotting tersebut, ada indikasi 1 dari 18 sampel mengalami pencampuran dengan jagung atau beras namun konsentrasi pencampurannya tidak dapat diketahui.
EFEKTIVITAS EKSTRAK METANOL DAUN KETEPENG CINA (Cassia alata L.) DALAM MENGHAMBAT PERTUMBUHAN BAKTERI Staphylococcus epidermidis SECARA TUNGGAL DAN KOMBINASI Annisa Putri Hanifa; Dina Erliana; Avidlyandi Avidlyandi; Meika Rizka; Deni Agus Triawan; Sal Prima Yudha S; Morina Adfa
Jurnal Biosilampari : Jurnal Biologi Vol 5 No 1 (2022): Biosilampari
Publisher : LP4MK STKIP PGRI Lubuklinggau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31540/biosilampari.v5i1.1787

Abstract

The aim of this study was to determine the antibacterial activity and the ccombined effect of methanol extract of the ketepeng cina leaves (Cassia alata L.) with six selected plant extracts against Staphylococcus epidermidis using the diffusion and the paper strip methods at a concentration of 10% w/v. The results showed the average antibacterial activity of each extract showed the inhibitory growth of Staphylococcus epidermidis. The average value of the inhibition zones of the single extract samples of ketepeng cina, sambang darah, ruku-ruku, avocado seed, bungli, pacar air, and sungkai resulted in inhibition zones of 6.28±0.20 mm, 7.90±0.31 mm, 2.30±0.37 mm, 3,53±0.50 mm, 4.35±0.52 mm, and 4.69±0.17 mm, respectively. Furthermore, the combination of methanol extract of ketepeng cina leaves (C. alata) with the six selected plants extract in an average diameter of inhibition zone greater than the average diameter of the inhibition zone of each extract. However, the average diameter of the inhibition zone of the combined extract was not more significant than the sum of the diameter of the inhibition zone of each extract. The conclusion of this study is the combination of the methanol extract of ketepeng cina leaves (C. alata) with six selected plant extracts has an additive/indifferent effect in inhibiting the growth of S. epidermidis.
Liquid Soap with Active Ingredients of Methanol Extract of Sambang Darah Leaves (Excoecaria cochinchinensis L.): Formulation, Characterization, and Antibacterial Activity Fatkhurrachman Fatkhurrachman; Avidlyandi Avidlyandi; Devi Nurhasana; Dina Erliana; Munifilia Eka Sari; Charles Banon; Risky Hadi Wibowo; Morina Adfa
Stannum : Jurnal Sains dan Terapan Kimia Vol 5 No 1 (2023): April 2023
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v5i1.3845

Abstract

The methanol extract of sambang darah leaves (Excoecaria cochinchinensis L.) contains flavonoids, saponins, tannins and triterpenoids which have the potential as antibacterial compounds. The goal of this research is to produce liquid soap that preparations with four formulas by varying the methanol extract of sambang darah leaves as the active ingredient, characterizing, and understanding its antibacterial activity. Organoleptic tests, foam stability, pH, specific gravity, and viscosity were all used to characterize liquid soap. The best results were obtained with liquid soap formulation 3 (3 g extract), which had foam stability of 84.10%, a pH of 9.62, specific gravity of 1.03 g/mL, and viscosity of 492.933 cP. The organoleptic test revealed that the liquid soap was a homogeneous viscous liquid with a blackish-brown color and a characteristic extract odor. The inhibition zone for antibacterial activity against Staphylococcus aureus and Escherichia coli was 9.15 mm and 13.72 mm, respectively. In antiseptic tests, all soap formulas reduced bacteria on the thumb.
Bismuth Silicate/Silica-Titania Synthesis from In Situ Decomposition of Oil Palm Leaves as Silica Source Salprima Yudha S; Morina Adfa; Swadexi Istiqphara; Muhamad Alvin Reagen
Science and Technology Indonesia Vol. 8 No. 3 (2023): July
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.2023.8.3.397-402

Abstract

In this work, bismuth silicate-titania has been synthesized in two stages by utilizing bismuth oxynitrate as an elemental source of bismuth, oil palm leaves (OPL) as a source of silica and titanium tetraisopropoxide (TTIP) as source of titania (TiO2). In the first stage,bismuth silicate/silica (Bi4Si3O12/SiO2) was formed, which occurs due to the in-situ decomposition of palm leaves and reacts directly with the bismuth precursor at high temperatures (900oC). The reaction could possibly occur through a solid-state reaction mechanism between bismuth oxide and silica or through a more complex mechanism within the reaction mixture. The resulting product then reacts with TTIP, which is added and heated at the same temperature to form Bi4Si3O12/SiO2-TiO2 (bismuth silicate/silica-titania). Characterization of the as-prepared product using X-ray diffraction showed the dominance of bismuth silicate and small amount of titania (TiO2). As a result, TiO2 could not be detected in the diffractogram. Nevertheless, an analysis using energy-dispersive X-rays showed the presence of titanium elements in the resulting composite. The results of this study can be used to develop ternary metal oxides based on natural resources and agricultural wastes, such as oil palm leaves.
Classification of Makasar Fruit Extract (Brucea javanica L. Merr.) Based on The Level of Ripeness Using a Combination of FTIR and UV-Vis Spectroscopy with Chemometrics Charles Banon; Deni Agus Triawan; Morina Adfa; Monica Santa Ana Sihite; Ria Nurwidiyani; Widia Rahmi
Jurnal Kimia Sains dan Aplikasi Vol 26, No 12 (2023): Volume 26 Issue 12 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.12.483-488

Abstract

Makasar fruit (Brucea javanica L. Merr) is a medicinal plant frequently utilized in Indonesia for its anti-malarial, anti-diabetic, antioxidant, and antibacterial properties. This research aims to classify extracts from B. javanica fruits based on their ripeness levels using a combination of FTIR and UV-Vis spectroscopy with chemometrics. Makasar fruits were extracted using methanol assisted by ultrasonic technology, resulting in a higher yield of extract from ripe fruit (black in color) than unripe fruit (green in color). The FTIR spectrum was measured at wavenumbers ranging from 4000 to 600 cm-1, while the UV-Vis spectrum was measured at wavelengths ranging from 200 to 800 nm. Notably, the UV-Vis spectrum revealed absorption peaks at 206 nm, attributed to the quassinoid group, and 265 nm, associated with the flavonoid group. Simultaneously, the FTIR spectrum showed various functional groups, including O-H, C-H, δ-lactone, C=C aromatic stretching vibrations, and C-O-C bending vibrations. Before conducting chemometric analysis, the FTIR and UV-Vis spectra were pre-processed as baseline and SNV. The research findings demonstrate that by employing UV-Vis and FTIR spectra in combination with chemometrics, it has been possible to distinguish Makasar fruit according to its ripeness level. Ripe and unripe fruit extracts were grouped with PC values of 88% for UV-Vis and 90% for FTIR, indicating distinct profiles between ripe and unripe fruit extracts of Brucea javanica.
The Effect of Adding Pine Tar Oil and Petrosin as Tackifier Ingredients on The Quality of Liquid Rubber Compound-based Adhesives Umi Alma Anggraini; Teja Dwi Sutanto; Irfan Gustian; Morina Adfa; Evi Maryanti
Jurnal Kimia Sains dan Aplikasi Vol 26, No 7 (2023): Volume 26 Issue 7 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.7.261-267

Abstract

This research is focused on the development of adhesives through the utilization of different types of tackifiers. The primary raw materials employed comprise 60% concentrated latex, which is subsequently blended with additives that have been dispersed, including KOH as a stabilizing agent, stearic acid and ZnO as activators, BHT as an antioxidant, CaCO3 as a filler, MBTS (Mercaptobenzothiazole disulfide) and TMTD (Tetramethyl Thiuram Disulphide) as accelerators, and sulfur as a vulcanizing agent. This research explored two specific variations of tackifiers: pine tar oil and petrosin. The characterization of the adhesives encompasses an analysis of acidity (pH), viscosity, adhesive strength, functional group analysis using FTIR, thermal properties, and XRD. The research findings showed that the optimal conditions were achieved in the third variation of the adhesive, with the same ratio of pine tar oil tackifier and petrosin of 4 grams each. In this particular variation, adhesives conforming to the SNI 12- 7195-2006 standards were produced, displaying an adhesion strength of 1.506 N/mm, a viscosity of 1075 cP, and a pH level of 4.6. Furthermore, thermal testing results reveal that the adhesive created with tackifier (V3) exhibits thermal resistance up to 350°C, a glass transition temperature of 354°C, and a melting point of 378°C.
Kampanye Penanganan Covid-19 di Perumahan Bukit Dewa Residence Kecamatan Selebar Kota Bengkulu Deni Agus Triawan; Budi Harlianto; Morina Adfa
Abdi Reksa Vol. 2 No. 2 (2021)
Publisher : UNIVERSITAS BENGKULU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/abdi reksa.2.2.1-6

Abstract

Kegiatan ini bertujuan untuk melakukan kampanye penanganan Covid-19 di Perumahan Bukit Dewa Residence Kota Bengkulu. Berdasarkan survey awal perilaku pencegahan Covid-19, diketahui bahwa virus korona (Covid-19) adalah virus yang berbahaya (90% setuju dan 7,5% ragu-ragu dan 2,5% tidak setuju). Hal ini seiring dengan pendapat tentang kondisi saat ini masih tergolong darurat Covid-19 (95% setuju dan 5% tidak setuju). Tindakan pencegahan penyebaran Covid-19 tetap perlu dilakukan (100% responden menjawab setuju). Lebih lanjut, tindakan pencegahan Covid-19 melalui penggunaan masker saat keluar rumah, sebanyak 92,5% responden menjawab selalu dan sebanyak 7,5% menjawab kadang-kadang. Terkait sikap saling mengingatkan tentang penggunaan masker, responden menjawab 75% mengingatkan jika ada orang tidak memakai masker dan 25% menjawab masa bodoh. Terkait kebiasaan mencuci tangan atau menggunakan handsanitizer, sebanyak 87,5% responden menjawab selalu dan 12,5% menjawab kadang-kadang. Tindakan pencegahan covid-19 berupa menjaga jarak (physical distancing)  merupakan tindakan yang paling sulit dilakukan oleh masyarakat dimana 57,1% responden menjawab kadang-kadang dan 42,9% menjawab selalu. Kampanye penanganan Covid-19 yang dilakukan melalui penyampaian informasi tentang perlunya tindakan pencegahan Covid-19 seperti 3M (menggunakan masker, mencuci tangan atau menggunakan handsanitizer dan menjaga jarak). Penyampaian informasi dilakukan melalui media virtual (whatsapp grup, status whatsapp dan media sosial) dan pemasangan spanduk untuk mencegah kerumunan serta pembuatan handsanitizer. Antusias warga dalam menerima informasi dan pemahaman terhadap pentingnya tindakan pencegahan covid-19 sangat baik dimana 100% masyarakat akan menggunakan masker jika keluar rumah, selalu mencuci tangan. Namun, kebiasaan untuk menjaga jarak masih sulit dilakukan seluruh warga jika di tempat umum seperti di pasar dan di tempat umum lainnya.
Analisis Hubungan Kuantitatif Struktur terhadap Aktivitas Turunan Senyawa Cubebin sebagai Antikanker dengan Metode Recife Model 1 (RM1) Herlita Widiyanti; Charles Banon; Morina Adfa
BENCOOLEN JOURNAL OF PHARMACY Vol. 1 No. 1 (2021): April
Publisher : UNIB PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/bjp.v1i1.15594

Abstract

Cubebin adalah senyawa lignan yang diisolasi dari spesies Cinnamomun parthenoxylon dan Piper cubeba. Cubebin mempunyai potensi sebagai antikanker, namun aktivitasnya masih relatif rendah. Oleh karena itu perlu dilakukan modifikasi gugus OH pada molekul cubebin dengan alkoksi untuk mendapatkan senyawa baru yang memiliki aktivitas antikanker yang lebih baik. Modifikasi molekul suatu senyawa dapat dilakukan melalui kajian teoritis HKSA senyawa turunan cubebin menggunakan deskriptor sterik, hidropobik dan elektronik. Nilai deskriptor diperoleh berdasarkan perhitungan kimia komputasi menggunakan program Hyperchem 8.0.8 dengan metode semiempirik Recife Model 1 (RM1). Data hasil perhitungan diolah menggunakan program SPSS versi 25.0 dengan metode analisis korelasi dan regresi linear berganda, sehingga diperoleh persamaan HKSA: IC50 = -0,248+(189,038)ELumo +(2,546) LogP +(2,673E-6) Ee +(-9,926E-5)Et(R=0,939; R2=0.881; Adj R2=0,865; SE=4,555; Fhitung/Ftabel=20,7; PRESS= 0,065). Dari persamaan HKSA, didapatkan senyawa prediksi yang sangat berpotensi sebagai antikanker adalah 5,5'-(((3R,4R)-2-methoxytetrahydrofuran-3,4diyl)bis(methylene))bis(benzo[d][1,3]dioxole) dengan nilai IC50 = 0,486 ?M. Dari hasil penelitian terlihat bahwa gugus metoksi (OCH3) lebih meningkatkan aktivitas antikanker dibandingkan dengan gugus alkoksi lainnya.
Pengaruh Pemberian Kombinasi Ekstrak Daun Merdeka (Chromolaena odorata L.) dan Umbi Bengkuang (Pachyrhizus erosus L.) Terhadap Hepatosomatic Index Tikus yang Diinduksi Etanol Wafa Syahidah; Reza Pertiwi; Morina Adfa
BENCOOLEN JOURNAL OF PHARMACY Vol. 2 No. 1 (2022): April
Publisher : UNIB PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/bjp.v2i1.23486

Abstract

Tumbuhan merdeka (Chromolaena odorata L.) dan umbi bengkuang (Pachyrhizus erosus L.) biasa digunakan dalam mengobati anti inflamasi secara tradisional karena kaya akan senyawa polifenol yang merupakan antioksidan sehingga dapat menetralkan radikal bebas yang menyebabkan kerusakan sel dan jaringan tubuh. Penelitian ini dilakukan untuk mengetahui pengaruh kombinasi ekstrak daun merdeka dan umbi bengkuang terhadap Hepatosomatic Index tikus putih jantan galur wistar yang diinduksi etanol. Sebanyak 25 ekor tikus dibagi menjadi 5 kelompok yang terdiri dari, kelompok 1 (normal, tanpa perlakuan), kelompok 2 (kontrol, induksi etanol di hari ke 14), kelompok 3 (kombinasi ekstrak dosis 100 mg/kgBB per oral), kelompok 4 (kombinasi ekstrak dosis 200 mg/kgBB peroral), dan kelompok 5 (kombinasi ekstrak dosis 400 mg/kgBB per oral). Perlakuan dilakukan selama 14 hari, setelah 1 jam perlakuan pada hari ke-14, tikus diinduksi etanol 96% dosis 1 mL/200 gBB peroral. Setelah 24 jam, tikus dibedah dan hepar diambil. Hasil analisis HSI tertinggi ditunjukkan oleh perlakuan kelompok D3 (3.98±0.56), D2 (3.66±0.26), D1 (3.37±0.91), N (3.15±0.42), dan K (3.12±0.41) secara berturut-turut. Dari hasil tersebut maka disimpulkan pemberian ekstrak daun merdeka dan umbi bengkuang pada tikus yang diinduksi etanol belum mampu mempengaruhi nilai HSI secara signifikan.
Komposit polianilin/logam oksida: sintesis, karakterisasi dan aplikasi: sebuah telaah pustaka Diana Andari; Sal Prima Yudha S; Morina Adfa
RAFFLESIA JOURNAL OF NATURAL AND APPLIED SCIENCES Vol. 2 No. 1 (2022): April
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rjna.v2i1.24443

Abstract

Polianilin (PANi) merupakan polimer yang memiliki sifat stabil dalam lingkungan, konduktivitas listrik yang baik, dan harga yang relatif murah. Sintesis komposit PANi/logam oksida dilakukan dengan berbagai metode yang meliputi polimerisasi in situ, mechanical milling, elektrodeposisi, pengadukan, ultrasonikasi. Produk sintesis PANi/logam oksida diantaranya seperti PANi/TiO2, PANi/SiO2, PANi/ZnO, dan PANi/Fe3O4. Komposit PANi/logam oksida memiliki berbagai aplikasi yaitu sebagai adsorben, fotodegradasi, dan antikorosi.
Co-Authors ., Avidlyandi A.A. Ketut Agung Cahyawan W Afif, Muhammad adli Agus Martono Agus Martono H. Putranto Alvin Reagen, Muhammad Annisa Putri Hanifa Arif Juliari Kusnanda Askhan, Jimmy Aswanda Aswin Falahudin Aswin Falahudin Aswin Falahudin Aswin Falahudin Avidlyandi . Avidlyandi, Avidlyandi Azizah Khusnul Charles Banon Charles Banon Della Faronica Della Indah Medani Deni Agus Triawan Deni Agus Triawan Devi Nurhasana Devi Nurhasana Devi Ratnawati Dhea Amelia Sari Diana Andari Dina Erliana Dita Delia Rothman Dwita Oktiarni Eka Angasa Eka Angasa Elsi Silvia Elsi Silvia Endarwati Wiwik Endarwati Eni Widiyati Evi Maryanti Evi Maryanti Evi Maryanti Fahmi, Riziq Ilham Nur Falahudin, Aswin Fatkhurrachman Fatkhurrachman Febriansyah, Rahmaga Fitriani, Dyah Ghufira Ghufira Harlianto, Budi Helfi Eka Saputra Hendri Bustamam Herlina Herlina Herlina Herlina Herlita Widiyanti Hidayah, Thoriqul Ika Diana Evita Indah Medani, Della Insin, Numpon Irfan Gustian Irfan Gustian Irfan Gustian Irfan Gustian Irfan Gustian Irfan Gustian Irmanida Batubara Juliari Kusnanda, Arif Khafit Wiradimafan Khafit Wiradimafan Khafit Wiradimafan Khafit Wirdimafan Khairani, Nurliza Khusnul Azizah Kurnia Farah Andina Liana Wahyuni Lisna Hamni M Masrukhin M. Eka Prastya M. Rafi Martono H.P, Agus Mawakhid, Oki Rokhim Mega Elfia Meika Rizka Meyola, Fenti Mohamad Rafi Monica Santa Ana Sihite Mudyanto, Andre Muhamad Alvin Reagen Muhammad Alvin Reagen Munifilia Ekasari Munifilia Ekasari Nesbah Nesbah, Nesbah Novrianto Tarigan Nurhasana, Devi Nurwidiyani, Ria Oki Rokhim Mawakhid Oki Rokhim Mawakhid Pasaribu, Cahaya Perdani, Meka Saima Prastya, M. Eka Puspasari, Jesi Putri Ramanda Putri Ramanda Rahmaga Febriansyah Ramanda, Putri Reagen, Muhamad Alvin redinta rahmawati Reza Pertiwi Reza Wahyuni Reza Wahyuni Ria Nurwidiyani Risky Hadi Wibowo Risky Hadi Wibowo Risky Hadi Wibowo Risky Hadi Wibowo Rochmah Supriati Rothman, Dita Delia Sal Prima Yudha S Sal Prima Yudha S Sal Prima Yudha S SALPRIMA YUDHA S Salprima Yudha S. Samuel Billie Tua Sinaga Samuel Billie Tua Sinaga Shari Winda Shari, Winda Silvia, Elsi Sinaga, Samuel Billie Tua Sipriyadi Sri Wahyu Kurnia Putri Suci Sukma Taruna Asral Supriati, Rochmah Suryadi Jaya Swadexi Istiqphara Swadexi Istiqphara Swadexi Istiqphara, Swadexi Tarigan, Lenon Jus Pentus Teja Dwi Sutanto Teja Dwi Sutanto Thoriqul Hidayah Triawan Deni Agus Triawan, Deni Agus Uci Cahlia Uci Cahlia Umi Alma Anggraini Vicka Andini Wafa Syahidah Wahyuni, Reza Welly Darwis Welly Darwis Wibowo Risky Hadi Wibowo, Risky Hadi Widia Rahmi Winda Shari Winda Shari Wulan Aprilia Syafitri Yona Harianti Putri Yudha S Yudha S