Browsing Turnitin Report by Author "Usman, Usman"
Now showing items 21-40 of 45
-
An Evaluation of the Antidiabetic and Antimicrobial Activity of an Ethanolic Extract from Rhizophora mucronata Leaf
Usman, Usman; Pintaka, Kusumaningtyas; Sukemi, Sukemi; Erwin, Erwin (JSK Farmasi Unmul Samarinda, 2023-08)The aim of this research was to determine the antidiabetic and antimicrobial properties of ethanolic extract of Rhizophora mucronata leaves, as well as the phytochemical elements contained in the leaf extract. Extracts ... -
GC-MS profiling and DPPH radical scavenging activity of the bark of Tampoi (Baccaurea macrocarpa)
Erwin, Erwin; Pusparohmana, Widar R.; Sari, Indah P.; Hairani, Rita; Usman, Usman (F1000Research,, 2019-12-01)Background : Tampoi ( Baccaurea macrocarpa) is a tropical rainforest plant that produces edible fruit and is native to Southeast Asia, especially East Kalimantan, Indonesia. Previous research showed that Tampoi potentially ... -
GC-MS profiling and DPPH radical scavenging activity of the bark of Tampoi (Baccaurea macrocarpa)
Erwin, Erwin; Widar Ristiyani, Pusparohmana ,; Indah Permata, Sari ,; Rita, Hairani ,; Usman, Usman (F1000 Research, 2019-12-20)Background : Tampoi ( Baccaurea macrocarpa) is a tropical rainforest plant that produces edible fruit and is native to Southeast Asia, especially East Kalimantan, Indonesia. Previous research showed that Tampoi potentially ... -
Indikator Asam Basa Alami dari Ekstrak Etanol Pucuk Daun Pucuk Merah
Usman, Usman (JPKP (Jurnal Kimia dan Pendidikan Kimia), 2017-12-31)Praktikum indikator asam basa alami biasanya dilakukan dengan mengekstrak bahan alam dengan pelarut tertentu, menguji ekstrak dengan berbagai macam larutan asam, basa dan netral, mencatat perubahan warnanya, menyimpulkan ... -
Inhibitory Activity of Candida albicans Fungi by Acetone Extract of the Lichen Usnea sp.
Maulidiyah, Maulidiyah; Prima Endang, Susilowati; Saprin, Saprin; Lilis, Diraa; Muhammad, Natsir; Usman, Usman; Nurlansi, Nurlansi; Muhammad, Nurdin (AIP Conference Proceedings, 2023-05-02)Lichen is a unique organism that produces various organic compounds such as primary and secondary metabolites. In this study, we focused on reporting the growth inhibitory activity of Candida albicans fungi by acetone ... -
Integration of Water Treatment Knowledge Using SETS Approach in Online Chemistry Learning to Improve Chemical Literacy of Students on the Aspect of Knowledge and Context
Pintaka, Kusumaningtyas; Sihol Dwijaya, Gultom; Usman, Usman; Nisaa Ul, Khoiriyyah (AIP Conference Proceedings 2642, 090007 (2023), 2023-01-11) -
ISOLATION AND CHARACTERIZATION OF STIGMASTEROL AND BETA-SITOSTEROL FROM WOOD BARK EXTRACT OF
Erwin, Erwin; Pusparohmana, Widar R.; Safitry, Rizka D.; Marliana, Eva; Usman, Usman; Kusuma, Irawan W. (Rasayan Journal, 2020-12-01)Baccaurea macrocarpa Miq. Mull. Arg. (known locally as Tampoi) is one of the edible fruit plants found in the forests of Borneo. The crude extract of wood bark of Tampoi was partitioned with n-hexane and ethyl ... -
ISOLATION AND CHARACTERIZATION OF STIGMASTEROL AND -SITOSTEROL FROM WOOD BARK EXTRACT OF Baccaurea macrocarpa Miq. Mull. Arg
Usman, Usman (http://www.rasayanjournal.co.in, 2020-10-20)Baccaurea macrocarpa Miq. Mull. Arg. (known locally as Tampoi) is one of the edible fruit plants found in the forests of Borneo. The crude extract of wood bark of Tampoi was partitioned with n-hexane and ethyl acetate ... -
Isolation of Natural Derivated Steroidal from Bark Stem of Melochia umbellata (Houtt) Stapf var. degrabrata K.
Usman, Usman (Asian Publication Corporation, 2020-02-25)Exploration of the natural product as pharmaceutical drug widely discover continuously for human life. The unique chemical compounds have been explored from bark stem of Melochia Umbellata (Houtt) Stapf var. degrabrata K. ... -
Isolation of Natural Derivated Steroidal from Bark Stem of Melochia umbellata (Houtt) Stapf var. degrabrata K.
Usman, Usman (Asian J. Chem,, 2020-02-25)Exploration of the natural product as pharmaceutical drug widely discover continuously for human life. The unique chemical compounds have been explored from bark stem of Melochia Umbellata (Houtt) Stapf var. degrabrata ... -
ISOLATION OF SECONDARY METABOLITE COMPOUNDS AND ANTIBACTERIAL ACTIVITIES TESTS FROM HEXANE EXTRACT OF STEM BARK MELOCHIA UMBELLATA (HOUTT) STAPF VAR. DEGRABRATA K
Usman, Usman (Innovare Academic Sciences, 2018-08-07)Objectives: This research aims to determine the content of secondary metabolite compounds and antibacterial activity of stem bark extract Melochia umbellata (Houtt) Stapf var. degrabrata. Methods: M. umbellata stem bark ... -
JI FITOKIMIA DAN TOKSISITAS LARVA UDANG DARI EKSTRAK METANOL KULIT BATANG MANGROVE (Rhizophora mucronata)
Elina Amelia, Shalehah; Usman, Usman (Jurusan Kimia FMIPA Unmul, 2021-10)Tanaman mangrove banyak memberikan manfaat bagi kehidupan manusia salah satunya sebagai sumber pangan dan obat. Obat yang dihasilkan dari tanaman mangrove dimanfaatkan sebagai obat asma, diabetes, rematik, hepatitis, ... -
Misconception Identification Of Buffer Solution Concept And Students’ Learning Style
Abdul, Majid; Usman, Usman; M., Amir; Suyono, .; Binar Kurnia, Prahani (www.iosrjournals.org,, 2018-04-09)The purpose of this study is to prevent misconception on the subject of buffer solution and students’ learning style. The population of this research is class XI SAINS SMA Negeri 1 Samarinda. The sample of this research ... -
PENERAPAN MODEL COOPERATIVE INTEGRATED READING AND COMPOSITION BERBANTUAN KOMIK UNTUK MENGURANGI MISKONSEPSI SISWA TENTANG TATA NAMA SENYAWA DAN PERSAMAAN REAKSI
Oktaviana, Oktaviana; Iis Intan, Widiyowati,; Usman, Usman (Program Studi Pendidikan Kimia FKIP Unmul, 2019-09-10)Penelitian ini bertujuan untuk mengurangi miskonsepsi siswa pada pokok bahasan tata nama senyawa dan persamaan reaksi melalui penerapan model pembelajaran cooperative integrated reading and composition (CIRC) berbantuan ... -
PENERAPAN MODEL COOPERATIVE INTEGRATED READING AND COMPOSITION BERBANTUAN KOMIK UNTUK MENGURANGI MISKONSEPSI SISWA TENTANG TATA NAMA SENYAWA DAN PERSAMAAN REAKSI
Oktaviana, Oktaviana; Iis Intan, Widiyowati,; Usman, Usman (Program Studi Pendidikan Kimia FKIP Unmul, 2019-02-10)Penelitian ini bertujuan untuk mengurangi miskonsepsi siswa pada pokok bahasan tata nama senyawa dan persamaan reaksi melalui penerapan model pembelajaran cooperative integrated reading and composition (CIRC) berbantuan ... -
Potensi toksisitas tumbuhan mangrove Rhizopora mucronata terhadap larva nyamuk Aedes aegypti
Usman, Usman (Bivalen: Chemical Studies Journal (BCSJ), 2021-11-30)Mangrove jenis Rhizopora mucronata merupakan sumber daya hayati yang banyak ditemukan di daerah pesisir pantai Indonesia, diantaranya pesisir pantai Kalimantan Timur. R. mucronata digunakanoleh masyarakat sebagai obat ... -
Production of Photosynthetic Pigments from Spirulina platensis Under Different Light Intensities
Pintaka, Kusumaningtyas; Sihol, Dwijaya Gultom; Usman, Usman (Berkala Sainstek Universitas Jember, 2023-09-30)Photosynthetic pigments from microalgae have great potential biotechnological applications, as healthy food colorants and cosmetics. The production of photosynthetic pigments depends on many environmental conditions, ... -
Sertifikat Akreditasi Program Doktor Ilmu Kimia Unhas Thn. 2012 - 2017
Usman, Usman (2012-05-24) -
TOXICITY AND ANTIMICROBIAL ACTIVITY FROM EXTRACT AND OLEANAN DERIVATIVE COMPOUNDS OF THE BARK MELOCHIA UMBELLATE (HOUTT) STAPF VAR. DEGRABRATA
Usman, Usman (2014-07-15)Oleanan derivative compound namely 3-acetyl-12-oleanen-28-oic acid, has been isolated from n-hexane fraction of the bark M. umbellate (Houtt) Stapf var. degrabrata The molecular structure was determined by IR spectroscopy, ... -
Toxicity And Antimicrobial Activity From Extract And Oleanan Derivative Comppounds Of The Bark Melochia umbellate (Houtt) Stapf var. Degrabrata.
Usman, Usman (Ubi Journal, 2014-07-24)Oleanan derivative compound namely 3-acetyl-12-oleanen-28-oic acid, has been isolated from n-hexane fraction of the bark M. umbellate (Houtt) Stapf var. degrabrata The molecular structure was determined by IR spectroscopy, ...