Article Per Year (5 Year)
p-Index From 2021 - 2026
14.074
P-Index
This Author published in this journals
All Journal JURNAL PENELITIAN SAINTIKA Journal of Agromedicine and Medical Sciences Jurnal Mirai Management Jurnal Surya Medika JURNAL PENELITIAN PENDIDIKAN MIPA Jambura Journal of Chemistry PREPOTIF : Jurnal Kesehatan Masyarakat Indonesian Journal of Pharmaceutical and Clinical Research Jurnal Aisyah : Jurnal Ilmu Kesehatan Journal of Pharmaceutical and Health Research International Journal Of Science, Technology & Management (IJSTM) Indonesian Journal of Chemical Science and Technology Journal of Economics and Business UBS Jurnal Kesehatan Tambusai Al-Sharf: Jurnal Ekonomi Islam JOURNAL LA MEDIHEALTICO Indonesian Journal of Pharmaceutical Education JUKESHUM: Jurnal Pengabdian Masyarakat FORTE JOURNAL Jurnal Pusat Studi Pendidikan Rakyat (PUSDIKRA) Jurnal Ilmiah Ibnu Sina (JIIS): Ilmu Farmasi dan Kesehatan Jurnal Farmanesia Jurnal Sains dan Teknologi Journal of Health and Medical Science International Journal of Public Health Excellence (IJPHE) International Journal of Health and Pharmaceutical (IJHP) ZAHRA: JOURNAL OF HEALTH AND MEDICAL RESEARCH Jurnal Farmasi Klinik dan Sains All Fields of Science Journal Liaison Academia and Sosiety Cross-border Eduvest - Journal of Universal Studies FARMASAINKES Nusantara Scientific Medical Research Journal PCJN Pharmaceutical and Clinical Journal of Nusantara Analit: Analytical and Environmental Chemistry Usada Nusantara: Jurnal Kesehatan Tradisional Journal of Pharmaceutical and Sciences. JK Jurnal Kesehatan Jurnal Penelitian Pendidikan MIPA Medic Nutricia : Jurnal Ilmu Kesehatan Media Farmasi Seroja Husada: Jurnal Kesehatan Masyarakat Indonesian Journal of Science and Pharmacy Jurnal Bakti Nusantara Jurnal Akademika Kimia Jurnal Sains dan Kesehatan MAFEBIS: Jurnal Manajemen, Akuntansi dan Bisnis
Ridwanto Ridwanto
Universitas Muslim Nusantara Al-Washliyah Medan
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Transportation Veterinary Other

Published : 123 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 123 Documents
Search

 2   3   4   5   6 
UPAYA PENINGKATAN HASIL BELAJAR KIMIA PADA MAHASISWA BARU PRODI FARMASI 2015/2016 UMN AL-WASHLIYAH Ricky Andi Syahputra, Anny Sartika D, Ridwanto
JURNAL PENELITIAN PENDIDIKAN MIPA Vol. 1 No. 1 (2016): Jurnal Penelitian Pendidikan MIPA
Publisher : LPPM UMN Al Washliyah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Perbaikan kualitas input mahasiswa baru di Prodi Farmasi UMN Al Washliyah Medanmenjadi fokus utama dalam meningkatkan kualitas proses belajar mengajar yangpada akhirnya meningkatkan hasil belajar mahasiswa. Oleh karena itu perlu dilakukanstandarisasi kemampuan awal, yang berupa matrikulasi bagi mahasiswa baru yang dapatmenjadi dasar untuk pemahaman materi secara lebih lanjut. Matrikulasi memberikankesempatan kepada mahasiswa baru untuk memperbaiki kekurangan atau memahamikembali konsep-konsep dasar dalam bidang kimia umum, sehingga mahasiswa menjaditermotivasi untuk lebih giat belajar. Untuk mempercepat proses pemahaman, setiapmahasiswa program matrikulasi diberikan modul pembelajaran sebagai bahan bacaanatau sebagai sumber belajar. Dalam penelitian ini akan dilakukan upaya peningkatankemampuan kimia pada Prodi Farmasi UMN Al-Washliyah Medan. Penelitian ini dimulaidengan (a)pembuatan soal dan di validasi oleh validator ahli, (b)melakukanpretest terhadap mahasiswa baru untuk mengetahui kemampuan awal mahasiswa, (c)melakukan proses pembelajaran terhadap mahasiswa baru, (d)melakukan postestterhadap mahasiswa baru untuk mengetahui peningkatan kemampuan mahasiswa, (e)melakukan analisis terhadap proses pembelajaran dan hasil belajar yang diperolehberdasarkan nilai pretes dan postes. Jumlah mahasiswa Prodi Farmasi T.A 2015/ 2016sejumlah 200 orang. Berdasarkan hasil pretes menunjukkan bahwa rendahnya hasilbelajar mahasiswa. Nilai dibawah 60 sebesar sebanyak 200 orang 100%. Setelahdilakukan penguatan melalui program matrikulasi nilai postes dibawah 60 menjadi 56orang (24%)sedangkan nilai 60 keatas sebanyak 152 orang (76%).
Penetapan Kadar Vitamin C Pada Minuman Sachet Ekonomis Dengan Berbagai Merkmenggunakan Metode Spektrofotometri UV Fadilah Husni, Anny Sartika Daulay, Ridwanto, Haris Munandar Nasution
Journal of Health and Medical Science Volume 2 Nomor 3 Juli 2023
Publisher : CV. Pusdikra Mitra Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51178/jhms.v2i3.1408

Abstract

Vitamin C merupakan vitamin yang mudah larut dalam air, fungi utama vitamin C adalah sebagai koenzim atau kofaktor. Vitamin C juga disebut asam askorbat karena senyawa ini kuat dalam reduksinya dan bertindak sebagai antioksidan dalam reaksi hidroksilasi. Selain berfungsi sebagai antioksidan vitamin C mempunyai fungsi lain yakni terkait pembentukan kolagen yaitu senyawa protein yang berperan dalam reaksi jaringan ikat. Vitamin C berperan dalam penyembuhan luka, patah tulang, pendarahan di bawah kulit dan pendarahan gusi, vitamin c juga dapat menurunkan tekanan darah, kolesterol, dan serangan jantung.Tijuana penelitian ini untuk mengetahui berapa kadar vitamin C di dalam Sampel Minuman Sachet Ekonomis dalam Berbagai Merk dan membandingkan kadarnya dengan yang ada di kemasan, dengan menggunakan spektrofotometri UV. Sebanyak 1 gram Sampel dimasukkan ke dalam labu ukur 100 mL, lalu ditambahkan akuades sampai tanda batas kemudian dihomogenkan. Dipipet sebanyak, masukkan ke dalam labu ukur 25 mL, tambahkan akuades hingga tanda batas. Selanjutnya, diukur serapannya pada panjang gelombang maksimum yang dilakukan 6 kali pengulangan untuk tiap sampel. Hasil penelitian menunjukan bahwa kadar rata-rata vitamin C pada Sampel A Pengenceran 1 6,3883 ± 0,1310 mcg/gr , Pengenceran 2 6,313 ± 0,1310 mcg/gr, Pengenceran 3 6,4134 ± 0,1310 mcg/gr, Pengenceran 4 6,4384 ± 0,1310 mcg/gr, Pengenceran 5 6,5636 ± 0,1310 mcg/gr, dan Pengenceran 6 6,4134 ± 0,1310 mcg/gr. Sampel B Pengenceran 1 17,85 ± 0,7439 mcg/gr, Pengenceran 2 16,929 ± 0,7439 mcg/gr, Pngenceran 3 16,7105 ± 0,7439 mcg/gr, Pengenceran 4 16,9735 ± 0,7439 mcg/gr, Pengenceran 5 17,105 ± 0,7439 mcg/gr, dan Pengenceran 6 17,719 ± 0,7439 mcg/gr. Sampel C Pengenceran 1 1,564 ± 0,0120 mcg/gr, Pengenceran 2 1,554 ± 0,0120 mcg/gr, Pengenceran 3 1,536 ± 0,0120 mcg/gr, Pengenceran 4 1,547 ± 0,0120 mcg/gr, Pengenceran 5 1,536 ± 0,0120 mcg/gr, dan Pengenceran 6 1,536 ± 0,0120 mcg/gr.
UJI AKTIVITAS ANTIOKSIDAN DARI EKSTRAK ETANOL DAUN SIDAGURI (Sida rhombifolia L.) DENGAN METODE DPPH (1,1-Difenil-2-Pikrilhidrazil) Khairunnisa Khairunnisa; Ridwanto Ridwanto
Jurnal Kesehatan Vol. 1 No. 3 (2023): September
Publisher : CV. ADIBA AISHA AMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Sidaguri (Sida rhombifolia L.) is a plant that contains alkaloids, flavonoids, saponins, tannins, and triterpenoids. Sidaguri plants contain antioxidants. Antioxidants are chemical compounds that can donate electrons to reactive free radicals so that they are not reactive and stable so that they can prevent the oxidation process in the body. This study aims to determine the class of chemical compounds contained in simplicia and sidaguri leaf extract and the antioxidant activity of sidaguri leaf extract. The research stages include the collection and processing of simplicia. Sidaguri leaf extract (Sida rhombifolia L.) was obtained by maceration method using 70% ethanol as solvent. Examination of the characteristics of simplicia powder. The extract whose solvent has been evaporated to become a thick extract is then carried out for phytochemical screening. The ability of the extract as an antioxidant was determined by reducing the DPPH radical (1,1-Diphenyl-2-picrylhydrazyl) with various extract concentrations 1500 μg/ml, 2000 μg/ml, 2500 μg/ml, 3000 μg/ml, 3500 μg/ml, 4000 μg/ml. The results of the extraction of sidaguri leaves obtained were 34.82 g of thick extract. The results of the phytochemical test of sidaguri leaves contain secondary metabolites, namely alkaloids, steroids, flavonoids, tannins, and saponins. The final result of the DPPH test is that the radicals change color from purple to yellow and their absorption is measured by UV-Vis spectrophotometry at a wavelength of 517 nm. The results of the antioxidant activity test carried out resulted in an IC₅₀ value of 2351.53 μg/ml which indicated that the antioxidant activity was very weak.
PENENTUAN KADAR PARASETAMOL DAN KAFEIN DALAM SEDIAAN TABLET MENGGUNAKAN METODE SPEKTROFOTOMETRI UV SECARA SIMPLE SIMULTAN EQUATION (SSE) Ainil Fithri Pulungan
Analit: Analytical and Environmental Chemistry Vol 8, No 2 (2023): ANALIT: ANALYTICAL AND ENVIRONMENTAL CHEMISTRY
Publisher : Universitas Lampung Jl. Prof. Dr. Sumatri Brojonegoro No.1 Bandar Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/aec.v8i2.2023.p75-85

Abstract

Perkembangan obat dalam bentuk tablet kombinasi pada masa saat ini telah banyak mengalami peningkatan, parasetamol menjadi obat analgetik antipiretik yang dapat dikombinasikan dengan kafein yang dapat digunakan dalam terapi dengan kombinasi antara obat tersebut. Penelitian ini bertujuan untuk menentukan kadar campuran parasetamol dan kafein dalam sediaan tablet menggunakan metode spektrofotometri UV secara Simple Simultan Equation (SSE). Hasil penelitian dari optimasi pelarut dengan 17 kategori pemilihan pelarut dan yang terpilih adalah asam asetat glasial: metanol (30:70) dengan menggunakan panjang gelombang maksimum parasetamol 246 nm dan kafein 272 nm. Hasil penelitian dari analisis campuran parasetamol dan kafein dengan spektrofotometri UV secara Simple Simultan Equation (SSE) menunjukkan bahwa kadar parasetamol dalam sediaan tablet A sebesar 96,93 ± 1,32%, sedangkan kadar kafein dalam tablet A 93,09 ± 9,99 %, Sampel B 107,53 ± 2,01% sedangkan kadar kafein dalam tablet B 105,8 ± 15,7 %, dan pada sampel C 103,66 ± 0,33% sedangkan kadar kafein dalam tablet C 105,94 ± 23 %. Dapat disimpulkan bahwa hasil penetapan kadar campuran parasetamol dan kafein dalam tablet memenuhi persyaratan sesuai dengan persyaratan Farmakope Edisi IV yaitu 90% - 110%. Untuk validasi metode dilakukan denganbeberapa parameter diantaranya uji akurasi diperoleh % Recovery parasetamol dalam sampel A 94,23 %, Sampel B 93,9% dan sampel C 97,24% sedangkan Kafein Sampel A 99,25%; B 92,66% dan C 97,3%. Untuk parameter uji presisi diperoleh rentang % RSD yaitu 0,8581%-5,85% dan untuk LOD parasetamol yaitu 0,87775 µg/mL dan LOQ 2,92582 µg/mL sedangkan LOD kafein yaitu 1,42041 µg/mL dan LOQ 4,73469 µg/mL. Dapat disimpulkan bahwa semua parameter sesuai dengan persyaratan yang ditetapkan.
OPTIMASI PEMBUATAN TEPUNG TALAS TERMODIFIKASI (Modified Taro Flour) DENGAN FERMENTASI Lactobacillus casei BERDASARKAN KADAR PROTEIN Imelda Natasia Br S Meliala; Anny Sartika Daulay; Ridwanto Ridwanto; Haris Munandar Nasution
Jurnal Farmasi Klinik dan Sains Vol 3, No 1 (2023): Jurnal Farmasi Klinik dan Sains (INPRESS)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Muhammadiyah Gombong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26753/jfks.v3i1.1110

Abstract

Ketergantungan penggunaan tepung terigu dapat dikurangi dengan menggunakan sumber karbohidrat lainnya seperti talas yang merupakan pangan lokal. Lactobacillus casei adalah salah satu spesies Bakteri Asam Laktat yang dapat menggunakan selobiosa sebagai sumber nutrisinya. Diperkirakan Lactobacillus casei dapat mendegresi sel umbi talas agar meningkatkan kadar protein talas. Diantara faktor yang dapat mempengaruhi kondisi fermentasi untuk menghasilkan tepung termodifikasi yang optimal adalah waktu fermentasi. Penelitian ini bertujuan untuk mengetahui pengaruh optimasi fermentasi umbi talas terhadap organoeleptis dan kadar protein pada tepung talas termodifikasi. Penelitian ini menggunakan metode eksperimental dengan dua optimasi waktu fermentasi yaitu fermentasi 48 jam dan fermentasi 72 jam dan uji karakterisasi yaitu uji organoleptis, uji kadar air, uji kadar abu dan uji kadar protein. Hasil penelitian ini menunjukkan organoleptis tepung mocaf, tepung talas, tepung talas termodifikasi berwarna coklat dan putih kecoklatan, bau sedikit asam dan tekstur yang halus. Kadar protein mocaf yaitu 2,17, tepung talas 2,33%, tepung talas termodifikasi 48 jam 3,16%, tepung talas termodifikasi 72 jam 3,53%. Kadar air tepung mocaf 11,31%, tepung talas 8,67%, tepung talas termodifikasi sebesar 10,81%. Kadar abu tepung mocaf 1,13%, tepung talas 2,73%, tepung talas termodifikasi 1,82%. Hasil yang diperoleh menunjukkan bahwa  fermentasi 72 jam merupakan hasil yang optimal.
Penetapan Kadar Kafein Ekstrak Daun Teh Hijau Dan Putih Camellia Sinensis (L.) Dengan Kromatografi Cair Kinerja Tinggi Selfia Lestary; Muhammad Amin Nasution; Ridwanto Ridwanto; Haris Munandar Nasution
Journal of Pharmaceutical and Sciences JPS Volume 6 Nomor 3 (2023)
Publisher : Fakultas Farmasi Universitas Tjut Nyak Dhien

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36490/journal-jps.com.v6i3.199

Abstract

Tea, a widely popular and frequently consumed beverage, is integral to daily routines. Despite the potential long-term risks associated with excessive caffeine consumption, such as hypertension, heart disease, and stroke, caffeine is a prominent choice among a diverse spectrum of individuals in society. The objective of this research endeavour is to discern the caffeine content present in extracts derived from green and white tea leaves by applying the high-performance liquid chromatography (HPLC) method. The research procedure encompasses a series of stages, encompassing the preparation of botanical materials, extraction employing ethanol solvent, characteristic analysis, phytochemical screening, and quantification of caffeine levels within the green and white tea leaf extracts utilising the HPLC technique. The extraction process of green and white tea leaves entails maceration utilising 96% ethanol, followed by concentration via a rotary evaporator. The determination of caffeine concentrations is executed using the high-performance liquid chromatography method. A phytochemical screening analysis of ethanol extracts derived from green and white tea leaves unveiled a myriad of chemical compound classes, including alkaloids, flavonoids, saponins, tannins, and steroids. The quantification of caffeine content within the samples is ascertained by calculating the area under the curve (AUC) on the chromatograms of green and white tea extracts. The quantification results for caffeine content in the green tea extract reveal a value approximately equivalent to 98.4278069571 mg/g. The white tea extract demonstrates a content value of approximately 136.131488681 mg/g.
Determination Of Total Flavonoid Content Of Yellow Wood (Arcangelisia Flava (L.) Merr) Extract And Antibacterial Activity Against Staphylococcus aureus Maryanti Yuza; Ridwanto Ridwanto; Zulmai Rani
Journal of Agromedicine and Medical Sciences Vol 9 No 3 (2023)
Publisher : Faculty of Medicine, Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/ams.v9i3.42614

Abstract

Yellow wood (Arcangelisia flava) is a medicinal plant that has received little attention. Merr and (L.). Yellow wood has antibacterial, antioxidant, anti-hyperlipidemic, and anti-cancer properties. Furthermore, yellow wood is known to contain a range of flavonoid compounds, such as hydroxylarcangelicin, which has broad antibacterial activity. The purpose of this research is to investigate the total flavonoid content of yellowwood extract as well as its antibacterial activity against Staphylococcus aureus bacteria. The manufacturing of methanol extract, characterization of simplisia, phytochemical screening, and determination of the total flavonoid levels of the yellow wood methanol extract by a visible spectroscopic approach were all part of this stage of research. Next, use chloramphenicol as a positive control and dimethyl sulfoxide (DMSO) as a negative control to test antibacterial activity against Staphylococcus aureus. The results of this study can be concluded to show that the total flavonoid levels in the methanol extract of yellow wood at a metanol concentration of 80% were 228,314 ± 5,4171 mg QE/g. At a 90% concentration of 245.993 ± 6.7626 mg QE/g and a 100% concentration of 265.953 3.0853 mg QE/g. Keywords: Yellow wood; Flavonoids; Spektrofotometri Visible; Stphylococcus aureus;
Uji sitotoksisitas ekstrak etanol daun sirih cina (Peperomia pellucida [L.] Kunth) dengan metode brine Shrimp lethality test Fadhlah Al-Uyun Nasution; Ridwanto Ridwanto; Zulmai Rani
Journal of Pharmaceutical and Sciences JPS Volume 6 Nomor 4 (2023)
Publisher : Fakultas Farmasi Universitas Tjut Nyak Dhien

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36490/journal-jps.com.v6i4.260

Abstract

The degree of harm a drug inflicts on cells, for instance, cancer cells, is known as its cytotoxicity. Cytotoxic substances can stop cancer cell proliferation, making anticancer medications possible. Plant extracts or active chemicals derived from plants can be used as herbal plants' anticancer agents. Among these is Chinese betel, a plant with numerous health benefits despite being frequently regarded as a weed. This study looked at the LC50 value using the BSLT method to identify the type of secondary metabolite chemicals and the cytotoxicity of Chinese betel leaf ethanol extract. This study looks at the number of Artemia salina deaths to characterise, screen for phytochemicals, and determine the cytotoxicity of Chinese betel leaves using the BSLT method- leaf larvae with LC50 values expressed. In the phytochemical screening test, Chinese betel leaves exhibited positive results for saponin, flavonoid, alkaloid, tannins, and steroids. The findings of the cytotoxicity test utilising probit analysis demonstrated that the ethanol extract of Chinese betel leaves is poisonous and may have anticancer properties, with an LC50 value of 335.7376 µg/mL.
Analisis kadar natrium benzoat pada kecap pedas yang beredar di pasaran dengan metode kromatografi lapis tipis (KLT) dan spektrofotometri Uv-Vis Tamara Army; Ainil Fithri Pulungan; Ridwanto Ridwanto; Anny Sartika Daulay
Journal of Pharmaceutical and Sciences JPS Volume 6 Nomor 4 (2023)
Publisher : Fakultas Farmasi Universitas Tjut Nyak Dhien

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36490/journal-jps.com.v6i4.266

Abstract

Sodium benzoate is one of the preservatives allowed in food and beverages. The objective of this research was to determine the level of sodium benzoate found in spicy soy sauce. Qualitative tests are first carried out on samples with the Thin Layer Chromatography (KLT) method, and quantitative tests are carried out using the spectrophotometry Uv-Vis method to determine the preservative level of sodium benzoate. Qualitative tests on KLT plates were carried out by optimising eluents (N-Butanol: Ethyl Acetate: Ammonia, Methanol: Ethyl Acetate: Ammonia, and Isopropanol: Ammonia), where the results of the three eluents showed that the Isopropanol: Ammonia eluents had Rf values from three samples that were close to each other with the comparison Rf values. The results of quantitative analysis on spectrophotometry Uv-Vis showed the total levels of Spicy Soy Sauce A 264.16±12.3206 mcg/g, Spicy Soy Sauce B 317.8±21.8643 mcg/g and Spicy Soy Sauce C 110.2±23.5356 mcg/g. Based on these results, it can be concluded that sodium benzoate levels in samples A, B, and C meet the requirements of the maximum usage limit standard, which is not more than 600 mg/kg.  
Penetapan kadar fenolik total ekstrak etanol, fraksi etil asetat dan n-heksan daun kopi robusta (Coffea canephora Pierre ex A. Froehner) dengan metode spektrofotometri Uv-Vis Yulia Nanda Putri; Muhammad Amin Nasution; Ridwanto Ridwanto; Anny Sartika Daulay
Journal of Pharmaceutical and Sciences JPS Volume 6 Nomor 4 (2023)
Publisher : Fakultas Farmasi Universitas Tjut Nyak Dhien

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36490/journal-jps.com.v6i4.301

Abstract

Phenolic compounds have various biological effects, such as antioxidant activity, can reduce the risk of cancer, coronary heart disease, stroke and other neurodegenerative diseases. Robusta coffee leaves (Coffea canephora Pierre ex A. Froehner) have activity as antioxidants because they contain abundant phenolic compounds. This study aims to determine the ratio of total phenolic levels between ethanol extract, ethyl acetate fraction and n-hexane fraction from robusta coffee leaves. In this study, the first step taken was a characterization test on simplicial powder and robusta coffee leaves macerated with 70% ethanol solvent. The maserat obtained is further fractionated with n-hexane and ethyl acetate. Followed by phytochemical screening on coffee leaf samples. Furthermore, the extract, n-hexane fraction and ethyl acetate determined total phenolic levels using visible spectrophotometry at a wavelength of 749 nm. Determination of total phenolic levels using the Folin-Ciocalteu method with gallic acid standards. Total phenolic levels are expressed in mg gallic acid equivalent (GAE) per gram of simplicial. The results showed that 70% ethanol extract of robusta coffee leaves had a total phenolic content of 25.9438± 0.0889 mg GAE/g. From the fractionation results show that the ethyl acetate fraction of robusta coffee leaves has a greater total phenolic content compared to the n-hexan fraction of 28.048 ± 0.3692 mg GAE / g and followed by the n-hexane fraction of 15.5231 ± 0.7213mg GAE / g. This is because the fractionation method can increase the desired compound content by removing or separating unwanted compounds, thus making the compound results in the use of fractions purer.
Co-Authors Abdullah, Husaini Abdullah, Muhammad Wahyuddin Adawiyah, Marissa Tasya Adyani Maulinda Afrizani, Afrizani Agus Priyadi Akbar, Windi Hari Al Hudawi, Muhammad Al Qodri, Muhammad Alviana, Liya Amin Nasution, Muhammad Amir, Annisa Fadilah Ani Sutiani Anny Sartika Daulay Anny Sartika Daulay Anny Sartika Daulay Anny Sartika Daulay Anny Sartika Daulay Aprilia, Hijjatun Aprilia, Medhy Ardhita Arifin, Khairil Fikri Arjuniadi, Arjuniadi Asep Trizaldi Audry Pratiwi Audry Pratiwi Azhar, Gustika Azri, Atika Azzahra, Fadya Cici Andriani Claudy Friesta Melanie Dalimunthe, Gabena Indriyani Damanik, Sumayyah Daniel Happy Putra Daulay , Anny Sartika Daulay, Ani Sartika Daulay, Anny S. Denni Bahari Dikki Miswanda Dina Suciati Saragih Dison Silalahi, Alistraja Elma Natasya Eva Fransiska Fadhilah M, Ihsan Fadhlah Al-Uyun Nasution Fajri, Fajrilda Aqilah Fathur Rahman Fathur Rahman Fatur Rahman Fithri Pulungan, Ainil Gabena Indrayani Dalimunthe Hafizha, Putri Harahap, Ade Try Atwinda Harahap, Siti Salimah Harahap, Sumiyarni Haris Munandar Nasution Harun , Fatur Rahman Harun, Fathur Rahman Hasanah, Qori Hasibuan , Nabila Hasim Hasibuan, Sarinah Hasibuan, Supia Indah Hazizah, Mautia Hermawan, Fiqri Humairah, Dwina Angelina Imelda Natasia Br S Meliala Irvan Andreansyah Irwan Misbach Isnaria, Vita Khairunnisa Khairunnisa Lastri Afni Lince Bulutoding Lubis, Minda Sari M. Naufal Rifqi Maghfirah , Dini Makhfirah Mambang, D Elysa Putri Manik, Umi Chairani Manurung, Aisyah Baddriah Maryanti Yuza Melinda, Reni Meliyana Meliyana Merani Phaustina Lumban Gaol Mirna Mirna Muchlis, Syaiful Muhammad Amin Nasution Muhammad Amin Nasution Muhammad Wahyudi Munthe, Ariska Munthe, Herlina Nada, Dina Qatrun Nadila Indra Sepvina Nasri Nasri, Nasri Nasution, Kartika Zsaskia Nasution, M. Amin Nasution, Shamila Sufi Aulia Nazirah, Nazirah Ningtias, Anggitha Nst, Haris Munandar Nuraida Nuraida Nurhayati Nurhayati Nurliansyah, Nurliansyah Parapat , Anjarlit Romiyuliana Br Pitaloka, Syifa Amilia Puteri, Cut Intan Annisa Putri Khairani Putri Theresia Harianja Putriyana Putriyana Qisti Pristiwani Rafita Yuniarti Rahayu , Yayuk Putri Rahayu Rahayu Rahma Dona Rahmadani , Adevika Rahmadani Rahmadani Rahmah, Ruhiya Rahmasari, Siti Rahmayanti, Putri Reza Irma Ricky Andi Syahputra Ricky Andi Syahputra Rika Yuliana, Rika Riski Mulyani, Riski Risma Fauziah Pasaribu Rizki, Dewi Rizki, Rahmad Robiatun Rambe Rosaldi, Hikmah Rossa, Aliffa S Sumarlin Sagala , Vipi Zetiara Salwa, Shakhila Saragih, Alkausar Sari, Farida Sartika Daulay, Anny Sasnita, Merida Selfia Lestary Shilvia, Fatin Sinaga, Novita Yulianti Siradjuddin, Siradjuddin Siregar , Anisah Sitompul, M. Saleh Sitorus, Dara Indah Sri Wahyuni Syahfitri , Adelya Syahputra, Ricky Andi Syalsabila Putri Syarifah Aulia Tamara Army Tambupolon, Sanya Tanika Utama, Fazrul Amin Vera Estefania Kaban Virda Nurmazela Wijiyaningsih, Dinda Yanti, Rahma Yayuk Putri Rahayu Yulia Nanda Putri Yuniarti , Rafita Yuniarti, Rafita Ziza Putri Aisyia Fauzi Zulmai Rani