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All Journal VALENSI Jurnal Sains dan Teknologi Kimia Indonesian Journal of Biotechnology IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Jurnal Tadris Kimiya Science and Technology Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) Chimica et Natura Acta Indonesian Journal of Chemistry Paedagoria : Jurnal Kajian, Penelitian dan Pengembangan Kependidikan Jurnal Kartika Kimia Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Journal of Vocational Education Studies Jurnal Ilmiah Farmako Bahari Jurnal Insan Farmasi Indonesia Indonesian Journal Of Educational Research and Review ICONESTH Jurnal Pengabdian Isola Jurnal Riset dan Praktik Pendidikan Kimia

Iqbal Musthapa

Universitas Pendidikan Indonesia

Author-ID : 326392

Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Dentistry Education Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Other

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KITOSAN DARI CANGKANG RAJUNGAN (PORTUNUS PELAGICUS) SEBAGAI INHIBITOR KOROSI BAJA KARBON PADA KONDISI SESUAI PIPA SUMUR MINYAK BUMI Arhatha, Nuky Dwifirly Pratiwi; Sunarya, Yayan; Musthapa, Iqbal
Jurnal Sains dan Teknologi Kimia Vol 4, No 1 (2013): Jurnal Sains dan Teknologi Kimia
Publisher : Program Studi Kimia Jurusan Pendidikan Kimia FPMIPA UPI

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

Pada pertambangan minyak bumi, minyak mentah yang dihasilkan mengandung garam-garam klorida, sulfat, dan karbonat; asam-asam organik dengan massa molekul rendah; dan gas yang bersifat asam sehingga diasumsikan bahwa pipa yang digunakan dalam sumur produksi minyak bumi sangat rentan terhadap korosi. Dalam penelitian akan dilaporkan mengenai potensi kitosan dari cangkang rajungan. Unutk meghambat laju korosi senyawa kithin yang dapat diproses menjadi kitosan melalui tahap deproteinasi, demineralisasi, depigmentasi dan deasetilasi. Kitosan yang diperoleh memiliki derajat deasetilasi sebesar 67,20%. Metode yang digunakan untuk menguji aktifitas inhibisi kitosan adalah EIS (Electrochemical Impedance Spectroscopy) dan polarisasi Tafel. Dari hasil pengukuran diketahui bahwa efisiensi inhibisi kitosan mencapai 82,85% pada konsentrasi maksimum 100 ppm dan suhu 65Â°C. Interaksi antara permukaan logam dengan molekul inhibitor adalah fisiosorpsi dengan nilai ÎGads sebesar -24,536 kJ/mol mengikuti isotherm Freundlich.Â Kata kunci: cangkang rajungan, inhibitor korosi, polarisasi Tafel, EIS

SINTESIS DAN KARAKTERISASI CAIRAN IONIK CIS-OLEIL IMIDAZOLINIUM TETRAKLOROFERRAT(III) Sanusi, Ahmad; Mudzakir, Ahmad; Musthapa, Iqbal
Jurnal Sains dan Teknologi Kimia Vol 4, No 1 (2013): Jurnal Sains dan Teknologi Kimia
Publisher : Program Studi Kimia Jurusan Pendidikan Kimia FPMIPA UPI

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Penelitian yang dilakukan bertujuan mensintesis dan menghidrolisis cairan ionik cis- oleil imidazolinium tetrakloroferrat(III). Cairan ionik ini disintesis dengan metode padat-padat dari senyawa cis-oleil imidazolinium klorida dengan FeCl3.6H2O. Karakterisasi struktur, dilakukan dengan FTIR, Mass Spectroscopy dan XRF sedangkan untuk sifat fisikokimianya dikarakterisasi dengan SRV, Susceptibility Meter dan TG-DTA. Berdasarkan hasil SRV didapatkan nilai koefisien friksi sebesar 0,027 dengan ketahanan friksi selama 60 menit. Hasil susceptibility meter memberikan nilai suseptibilitas magnet sebesar 6,3 x 10-5 SI. Hasil uji TG-DTA menunjukkan titik dekomposisi material pada 230 ËC. Berdasarkan hasil penelitian yang dilakukan tersebut, diharapkan bahwa cairan ionik ini dapat digunakan sebagai material pelumas media magnetik.Â Kata kunci: pelumas media magnetik, cis- oleil imidazolinium tetrakloroferrat(III), koefisien friksi, suseptibilitas magnetik, kestabilan termal.

Analisa Karakteristik Simplisia Buah Andaliman (Zanthoxyllum acanthopodium) Serta Aktivitas Penghambatan Xantin Oksidase Dhini Anisa; Fajar Fauzi Abdullah; Riza Apriani; Gun Gun Gumilar; Iqbal Musthapa
Chimica et Natura Acta Vol 7, No 3 (2019)
Publisher : Departemen Kimia

Gout atau hiperurisemia adalah keadaan dimana terjadinya peningkatan kadar asam urat dalam darah. Xantin oksidase berperan dalam oksidasi xantin dan hipoxantin menjadi asam urat. Salah satu pengobatan kelebihan asam urat adalah menghambat aktivitas enzim xantin oksidase. Penelitian ini menguji aktivitas anti asam urat ekstrak etanol dari buah andaliman kemudian dan menentukan nilai persentase penghambatannya. Hasil pengujian menunjukkan bahwa ekstrak buah andaliman memiliki potensi yang baik untuk menjadi kandidat antihiperurisemia, dengan nilai persentase penghambatannya sebesar 70,67% pada konsentrasi ekstrak sebesar 100 µg/mL.

Isolation of Piperin from The Fruit of Piper retrofractum Iqbal Musthapa; Gun Gun Gumilar
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 2, No 1 (2017): February 2017
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i1.06

This paper will described the isolation of major compound from MeOH extract from the fruit of Piper retrofractum. Using several chromatography technique including liquid vacuum chromatography and thin layer chromatography, and further purification using re-cristalization technique, Piperine, an alkaloids compound, was isolated from this extract. The structure of this compound was determined using spectroscopic methods including FTIR, 1D-NMR and 2-D NMR.Keywords : P.retrofractum, alkaloids, piperine, structure elucidation

USE OF 3D-VISUALIZATION MEDIA IN NUCLEOPHILIC SUBSTITUTION REACTION MATERIAL TO IMPROVE STUDENTS' CONCEPT MASTERY Dessi Nur Adiska; Liliasari Liliasari; Iqbal Musthapa
Jurnal Tadris Kimiya Vol 5, No 2 (2020)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v5i2.9820

Development of technology is increasingly rapid today, including in the field of education. Technological developments are sometimes not used properly in the learning process, so that students not actively studying in class. The purpose of this study was to determine the effect of using 3D visualization media on nucleophilic substitution reaction material to improve students' concept mastery. Research method used was a quasi-experiment with pre-test and post-test design, involved 68 students from two different universities in West Java. The test instrument to measure concept mastery consisted of nine reasoned multiple-choice questions. The results showed that the use of 3D visualization media in nucleophilic substitution reaction materials can improve students' mastery of concepts. Based on the N-gain calculation results, University A was better than University B except for the indicators of determining that obtained a medium category and sorting that obtained a low category. There were four indicators of concept mastery used, including determining, analyzing, linking, and sorting indicators.

A Green Synthesis of a Novel Calix[4]Resorcinarene from 7-Hydroxycitronellal Using Microwave Irradiation Ratnaningsih Eko Sardjono; Iqbal Musthapa; Iis Rosliana; Fitri Khoerunnisa; Galuh Yuliani
Indonesian Journal of Chemistry Vol 18, No 1 (2018)
Publisher : Universitas Gadjah Mada

A new versatile macromolecule cyclic C-3,7-dimethyl-7-hydroxycalix[4]resorcinarene (CDHHK4R) has been synthesized from a fragrance agent, 7-hydroxycitronellal, via microwave irradiation. The reaction utilized a domestic microwave oven at various irradiation time and power to yield an optimum condition. As a comparison, the conventional heating method was also employed for the synthesis of the same calix[4]resorcinarene. Compared to the conventional method, microwave-assisted reaction effectively reduced the reaction time, the amount of energy consumption and the waste production. It is found that the synthesis of CDHHK4R by microwave irradiation yielded 77.55% of product, higher than by conventional heating which was only 62.17%.

Analysis Of Phytochemical Profile And Antioxidant Activities From Ethanol Extract Of Leaf, Stem Bark And Wood Clausena lansium L. Fajar Fauzi Abdullah; Ruchiyat Ruchiyat; Iqbal Musthapa
Jurnal Kartika Kimia Vol 3 No 1 (2020): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, Jenderal Achmad Yani University

Wampi belongs to Rutaceae family. The shape of this plant is kind of bush or small tree and its fruits are similar to grapples or oranges. C. lansium was reported has the main biological activity as radical scavenger. The aim of this study to identify the content of secondary metabolites found in bark, woody stems and leaves of C. lansium plants, and to determine antioxidant activity through IC50 values. This research method begins with sample preparation, plant determination, simplicia characteristic examination, extraction, characterization with infrared spectroscopy, thin layer chromatography (TLC), then proceed with antioxidant activity assay using DPPH method (2.2 -Diphenyl-1-picrylhidrazyl) with a comparison of vitamin C. The results of this study showed that C. lansium contains alkaloids and kumarin. Furthermore, antioxidant activity assay measured absorption at a wavelength of 517 nm, obtained IC50 values of vitamin C 6.22 ppm; bark 231.54 ppm (weak), wood stem 131.49 ppm (weak), and leaves 22,60 ppm (strong). Keywords: Clausena lansium, Antioxidant, phytochemical profile.

PEMANFAATAN KAYU BATANG JAMBU BOL (Syzygium malaccense (L). Merr. & Perry) SEBAGAI SUMBER ANTIOKSIDAN BARU Nenden Fauziah; Noviyanti Noviyanti; Iqbal Musthapa
Jurnal Ilmiah Farmako Bahari Vol 10, No 1 (2019): Jurnal Ilmiah Farmako Bahari
Publisher : Fakultas MIPA Universitas Garut

Penelitian tentang pemanfaatan kayu batang jambu bol (Syzygium malaccense)sebagai sumber antioksidan baru telah dilakukan. Hasil skrining fitokimia menunjukkan simplisia mengandung senyawa flavonoid, fenol, saponin, alkaloid, tannin, kuinon dan steroid. Uji daya antioksidan terhadap ekstrak etanol kayu batang jambu bol (Syzygium malaccense) dilakukan dengan menggunakan metode DPPH(2,2 - diphenyl-1-picrihidrazil)dan menunjukkan nilai IC50 sebesar 40.12  0.06 ppm. Vitamin C yang digunakan sebagai pembanding menunjukkan nilai IC50 sebesar 4.07 ± 0.03 ppm. Kata kunci: Batang jambu bol, Syzygium malaccense, antioksidan, metode DPPH

Lignan (+)-Piperitol-γ,γ-Dimethylallylether from Stem Bark of Zanthoxylum rhetsa (Roxb.) DC (Rutaceae) Ruchiyat Ruchiyat; Al Arofatus Naini; Tati Herlina; Iqbal Musthapa; Unang Supratman
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 2, November 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i2.26964

Lignans are a group of phenylpropanoid dimers in which the phenylpropane units are linked by their propyl side chains' central carbon (C8). Lignans have various biological activities, including antiviral, anticancer, cancer preventive, and cytotoxic. Zanthoxylum rhetsa (Roxb.) DC is a tree with prickly branchlets belonging to the Zanthoxylum genus, commonly known as panggal buaya in Indonesia. Asian tribes have used this plant as traditional medicine. In this study, (+)-piperitol-γ,γ-dimethylallylether, a furofuran lignan, was successfully isolated. The chemical structure of compound 1 was determined based on spectroscopic data, including 1D- and 2D-NMR, mass spectroscopy, and by comparing with previous spectral data. In addition, compound 1 was tested for its cytotoxic activity against MCF-7 breast cancer cell lines in vitro and showed weak activity with the IC50 value of 261.37 µg/mL.

Science Literacy-Oriented Project Based Learning Development for Chemistry Teachers of High Schools in Sumedang District [Pendalaman Materi dan Perancangan Pembelajaran Project Based Learning Berorientasi Literasi Sains Untuk Guru-Guru Kimia se-Kabupaten Sumedang] Hernani Hernani; Atep Rian Nurhadi; Ahmad Mudzakir; Soja Siti Fatimah; Heli Siti Halimatul; Iqbal Musthapa; Yaya Sonjaya; Asep Supriatna; Cecep Jaenudin
Jurnal Pengabdian Isola Vol 2, No 1 (2023): JPI: VOLUME 2, ISSUE 1, 2023
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jpi.v2i1.59332

Pentingnya keterampilan berpikir dan bertindak yang melibatkan penguasaan berpikir dan menggunakan cara berpikir saintifik dalam mengenal, menyikapi, dan menyelesaikan permasalahan terkait kehidupan nyata perlu dilatihkan kepada peserta didik, salah satu caranya melalui literasi sains dan pembelajaran berbasis proyek (PjBL). Hal tersebut perlu dilatihkan kepada para guru di sekolah melalui kegiatan kolaborasi Musyawarah Guru Mata Pelajaran (MGMP) dengan para pendidik di Perguruan tinggi, khususnya Lembaga Pendidikan Tenaga Kependidikan (LPTK). Berdasarkan tujuan tersebut, Departemen pendidikan Kimia FPMIPA UPI menyelenggarakan kegiatan Pengabdian kepada Masyarakat (PkM) bekerjasama dengan guru-guru MGMP Kimia Kabupaten Sumedang. Kegiatan ini dilaksanakan dengan pola 32 Jam Pelajaran (JP) menggunakan metode daring melalui platform zoom dan luring yang dilaksanakan di SMAN 1 Cimalaka. Kegiatan PkM ini terdiri atas pemaparan materi tentang literasi sains dan project based learning, pendalaman konten kimia terkait materi Green Chemistry, serta workshop perancangan perangkat pembelajaran PjBL berorientasi literasi sains. Melalui kegiatan workshop ini, para guru mendapatkan pemahaman yang utuh tentang PjBL dan literasi sains, berhasil merancang pembelajaran dengan model PjBL yang berorientasi literasi sains, serta mendapat kesempatan untuk memaparkan ide dan gagasannya melalui kegiatan seminar. Rancangan pembelajaran yang dibuat sudah siap untuk diterapkan di sekolah, karena telah memperoleh masukan ketepatan konten dan konteksnya secara mendalam pada kegiatan workshop maupun pada kegiatan seminar hasil workshop.

Co-Authors - Ruchiyat Ade Danova Ahmad Aminudin Ahmad Sanusi Al Arofatus Naini Asep Supriatna Atep Rian Nurhadi Cecep Jaenudin Chavasiri, Warinthorn Danova, Ade Dessi Nur Adiska Desti Nursaleh Dhini Anisa Didin Mujahidin Fadilawati, Siti Fajar Fauzi Abdullah Fajar Fauzi Abdullah Fajeriyati, Nurul Fandi Ahmad Fitri Khoerunnisa Florentina Maria Titin Supriyanti Galuh Yuliani Gun Gun Gumilar Gun Gun Gumilar Gun Gun Gumilar Hasanah, Ika Heli Siti Halimatul Hendrawan Hendrawan Herlan Herdiawan Hermawati, Elvira HERNANI - Humairo, Ristvi Iis Rosliana Ika Nurhayati Irawan, Nisrina Zahira Putri Kurniadewi, Fera Lestari, Nanda Ayu Liliasari Liliasari Liliasari Mahmudah, Eneng Mr Sjaeful Anwar Nenden Fauziah NFN Noviyanti Nuky Dwifirly Pratiwi Arhatha Nur Indah Sari Nuraini, Vidia Afina Perdana, Farid Pratiwi, Eka Nikita Ratnaningsih Eko S. Riza Apriani Rosi Oktiani Ruchiyat Ruchiyat Sa'adah, Pipih Lutfi Siti Aisyah Sjaeful Anwar Soja Siti Fatimah Soja Siti Fatimah Tati Herlina Unang Supratman Wonganan, Piyanuch Yaya Sonjaya Yayan Sunarya

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