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All Journal VALENSI Jurnal Natur Indonesia Jurnal Matematika & Sains Bulletin of Chemical Reaction Engineering & Catalysis Journal of Mathematical and Fundamental Sciences Jurnal Industri Hasil Perkebunan Jurnal Penelitian Sains Jurnal Sains Teh dan Kina ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry PHARMACY: Jurnal Farmasi Indonesia (Pharmaceutical Journal of Indonesia) Molekul: Jurnal Ilmiah Kimia Journal of Microbial Systematics and Biotechnology Molekul: Jurnal Ilmiah Kimia al Kimiya : Jurnal Ilmu Kimia dan Terapan

Yana Maolana Syah

Biochemistry Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung

Author-ID : 398733

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Energy Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics

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The Synthesis of Imidazoline Derivative Compounds as Corrosion Inhibitor towards Carbon Steel in 1% NaCl Solution Deana Wahyuningrum; Sadijah Achmad; Yana Maolana Syah; Buchari Buchari; Bambang Ariwahjoedi
Journal of Mathematical and Fundamental Sciences Vol. 40 No. 1 (2008)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.sci.2008.40.1.4

Oleic imidazoline is one of the nitrogen containing heterocyclic compounds that has been widely used as commercial corrosion inhibitor, especially in minimizing the carbon dioxide induced corrosion process in oilfield mining. In this present work, some imidazoline derivative compounds have been synthesized utilizing both conventional and microwave assisted organic synthesis (MAOS) methods, in order to determine their corrosion inhibition properties on carbon steel surface. The MAOS method is more effective in synthesizing these compounds than the conventional method regarding to the higher chemical yields of products (91% to 94%) and the shorter reaction times (7 to 10 minutes). The characterization of corrosion inhibition activities of the synthesized products towards carbon steel in 1% NaCl solution was determined by the Tafel plot method. The corrosion inhibition activities of compound 1b ((Z)-2-(2-(heptadec-8-enyl)-4,5-dihydroimidazol-1-yl)ethanamine), 2b ((Z)-2-(2-(heptadec-8-enyl)-4,5-dihydroimidazol-1-yl)ethanol) and 3b (2-(2-heptadecyl-4,5-dihydroimidazol-1-yl)ethanamine) at 8 ppm concentration in 1% NaCl solution are, respectively, 32.18%, 39.59% and 12.73%. The heptadec-8-enyl and hydroxyethyl substituents at C(2) and N(1) position of imidazoline ring, respectively, gave the most effective corrosion inhibition activity towards carbon steel compared to the presence of other substituents. The increase in concentrations of compound 1b, 2b and 3b in 1% NaCl solution tends to improve their corrosion inhibition activities. Based on the analysis of the free Gibbs adsorption energy (Ã„G0ads) values of compound 1b, 2b and 3b (-32.97, -34.34 and -31.27 kJ/mol, respectively), these compounds have the potential to interact with carbon steel through semi-physiosorption or semi-chemisorption.

Artelastokromen Suatu Diprenilpiranoflavon dan B-Resorsilaldehid dari Kayu Batang Artocarpus Lanceifolius Didin Mujahidin; Sjamsul Arifin Achmad; Yana Maolana Syah; Euis Holisotan Hakim; Lukman Makmur; Norio Aimi; Mariko Kitajima; Hiromitsu Takayama; Rusjdi Tamin
Journal of Mathematical and Fundamental Sciences Vol. 32 No. 2 (2000)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstrak. Dua senyawa, yaitu artelactokromen (1), suatu diprenil piranoflavon, dan B-resorsilaldehid (2) telah ditemukan untuk pertama kalinya pada kayu batang tumbuhan Artocarpus lanceifolius Roxb. (Moraceae), suatu tumbuhan langka yang endemic untuk Indonesia dan dikenal dengan nama Keledang. Struktur molekul kedua senyawa tersebut telah ditetapkan berdasarkan data fisika dan spektroskopi (MS, 1H dan 13C NMR). Baik artelastokromen (1) maupun B-resorsilaldehid (2) tidak terlalu toksik terhadap nauplii udang Artemia salina Leach., masing-masing dengan LC50 298,2 dan 79,7 ug/mL. Artelastochromene a Diprenylphyranoflavone and Î’-Resorcylaldehyde from the Wood Trunk of Artocarpus LanceifoliusAbstract. Two phenolic constituent, namely artelastochromene (1), a diprenyl pyranoflavone, and Î²-resorcylaldehyde (2) had been isolated from the wood trunk of Artocarpus lanceifolius Roxb. (Moraceae), an endemic species of Indonesia, locally known as Keledang. The structures of both compounds were elucidated based on physical and spectroscopic data (MS, 1H and 13C NMR). Both artelastochromene (1) and Î²-resorcylaldehyde (2) showed very slight toxic effect against shrimp nauplii Artemia salina Leach., LC50 298,2 and 79,7 Î¼g/mL, respectively.

Suatu Senyawa Stilbene Terprenilasi dari Kayu Akar Tumbuhan Artocarpus Altilis Euis Holisotan Hakim; Valentina Adimurti; Lukman Makmur; Sjamsul Arifin Achmad; Didin Mujahidin; Yana Maolana Syah; Norio Aimi; Mariko Kitajima; Hiromitsu Takayama
Journal of Mathematical and Fundamental Sciences Vol. 33 No. 3 (2001)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Suatu stilben terprenilasi, trans-4-(3-metil-E-but-l-enil)-3,5,2',4'-tetrahidroksistilben telah ditemukan untuk pertama kalinya dari ekstrak kloroform kayu akar tumbuhan Artocarpus altilis (Moraceae), yang dikenal dengan nama Sukun. Struktur molekul senyawa ini telah ditetapkan berdasarkan data fisika dan spektroskopi UV, IR, MS, 1H dan 13C NMR. Senyawa ini bersifat toksik (LC50 = 45,7 µg/mL) terhadap benur udang Artemia salina Leach. A prenylated stilbene from the root trunk of Artocarpus altilisA prenylated stilbene, trans-4-(3-methyl-E-but-l-enyl)-3,5,2',4'-tetrahydroxystilbene had been isolated for the first time from the chloroform extract of the root trunk of Artocarpus altilis (Moraceae), locally known as Sukun. The structure of this compound was Elucidated based on physical and spectroscopic data UV, IR, MS, 1H and 13C NMR. It showed strong toxicity (LC50 = 45,7 µg/mL) agains Atrtemia salina Leach shrimp.*Bagian ke-25 dari seri "llmu Kimia Tumbuhan Moraceae lndonesia". Untuk Bagian ke-24 lihat pustaka (5)

Artoindonesianin D: a New Bioactive Pyranoflavone Derivative and Chaplashin from Artocarpus Maingayi Euis Holisotan Hakim; Affrida Affrida; Eliza Eliza; Sjamsul Arifin Achmad; Lukman Makmur; Didin Mujahidin; Yana Maolana Syah; Norio Aimi; Mariko Kitajima; Hiromitsu Takayama
Journal of Mathematical and Fundamental Sciences Vol. 32 No. 1 (2000)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Sari. Suatu senyawa baru flavonoid terisoprenilasi turunan piranoflavon, yakni 5-hidroksisiklomorusin yang diberi nama artoindonesianin D (1), dan suatu senyawa turunan oksepinoflavon, yakni chaplasin (2), telah ditemukan untuk pertama kalinya, masing-masing pada kulit akar dan kayu akar tumbuhan Artocarpus maingayi King (Moraceae). Tumbuhan langka ini berasal dari Sumatera Barat dan endemik untuk Indonesia, serta dikernal dengan nama daerah Cubadak Utan. Struktur molekul kedua senyawa tersebut telah ditetapkan berdasarkan data fisika dan spektroskopi (MS, 1H dan 13C NMR). Artoindonesianin D (1) dan chaplasin (2) bersifat toksik terhadap nauplii udang Artemia salina Leach. Artoindonesianin D: a New Bioactive Pyranoflavone Derivative and Chaplashin from Artocarpus MaingayiAbstract. A new isoprenylated flavonoid, a pyranoflavone derivative 5'-hydroxycyclomorusin named artoindonesianin D (1), and an oxepinoflavone derivative chaplashin (2) were isolated for the first time, respectively from the root bark and root trunk of Artocarpus maingayi King. (Moraceae). This plant is locally known as Cubadak Utan, a rare species found in West Sumatera and endemic to Indonesia. The structure of both compounds were elucidated based on physical and spectroscopical data (MS, 1H and 13C NMR). Artoindonesianin D (1) and chaplashin (2) showed toxic effect against shrimp nauplii Artemia salina Leach.

Artoindonesianin-E suatu senyawa baru turunan flavanon dari tumbuhan Artocarpus Champeden Euis Holisotan Hakim; Asep Aripin; Sjamsul Arifin Achmad; Norio Aimi; Mariko Kitajima; Lukman Makmur; Didin Mujahidin; Yana Maolana Syah; Hiromitsu Takayama
Journal of Mathematical and Fundamental Sciences Vol. 33 No. 3 (2001)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Sari. Suatu senyawabaru turunan flavanon, yakni 5,7-dihidroksi-2',4',6'-trimetoksiflavanon yang diberi nama artoindonesianin-E(1 ), telah ditemukan untuk pertama kalinya bersama-samad engan artokarpin (2) dan heteroflavanon-A (3) pada ekstrak benzena kulit batang tumbuhan Artocarpus champeden Spreng (Moraceae), suatu tumbuhan yang endemik untuk Indonesia, serta dikenal dengan narna Cempedak. Struktur molekul senyawa tersebut telah ditetapkan berdasarkan data fisika dan spekroskopi (MS, 1H dan 13C NMR).Artoindonesianin-E a New Flavanone Derivative from Artocarpus ChampedenAbstract. A new flavanone derivative, 5,7-dihydroxy-2',4',6'-trimethoxyflavanone named artoindonesianin-E (1) had been isolated for the first time, together with artocarpin (2) and heteroflavanone-A (3) from benzene extract of the tree bark of Artocarpus champeden Spreng. (Moraceae), a species endemic to Indonesia and locally known as Cempedak. The structure of this compound was elucidated based on physical and spectroscopic data (MS, 1H and 13C NMR).

KARAKTERISASI SENYAWA FENOL DARI KAYU BATANG MORUS NIGRA Ferlinahayati Ferlinahayati; Euis Holisotan Hakim; Yana Maolana Syah; Lia Dewi Juliawaty
Molekul Vol 8, No 1 (2013)
Publisher : Universitas Jenderal Soedirman

Tumbuhan Morus merupakan salah satu genus utama dalam famili Moraceae. Senyawa-senyawa turunan fenol merupakan kandungan utama dari genus ini, diantaranya kelompok stilben, 2-arilbenzofuran, flavonoid dan adductDiels Alder. Penelitian ini merupakan bagian dari penelitian mengenai kajian fitokimia terhadap tumbuhan Morus. Ekstraksi dilakukan secara maserasi terhadap kayu batang Morus nigra menggunakan pelarut metanol yang dilanjutkan dengan pemisahan menggunakan berbagai teknik kromatografi sehingga diperoleh senyawa murni. Berdasarkan data-data spektroskopi yang meliputi spektrum UV, IR dan NMR maka senyawa murni hasil isolasi tersebut merupakan senyawa fenol yaitu b-resorsilaldehid.

SESKUITERPEN FURANODIENON DARI RIMPANG Curcuma xanthorrhiza DAN AKTIVITAS ANTIBAKTERINYA Hartiwi Diastuti; Yana Maolana Syah; Lia Dewi Juliawaty; Marlia Singgih
Molekul Vol 8, No 2 (2013)
Publisher : Universitas Jenderal Soedirman

ABSTRAK [Full Text]Curcuma xanthorrhiza dikenal sebagai tanaman obat Indonesia, rimpangnya sering digunakan dalam pengobatan tradisional. Penelitian ini bertujuan untuk mengisolasi senyawa seskuiterpen dari rimpang Curcuma xanthorrhizadan menguji aktivitas antibakterinya. Isolasi senyawa dilakukan dengan kromatografi kolom vakum cair dan kromatografi radial. Identifikasi struktur dilakukan secara spektroskopi (FTIR (Fourier Transfrom Infra Red), NMR (Nuclear Magnetic Resonance) 1D dan 2D, serta MS (Mass Spectroscopy)). Uji antibakteri dilakukan dengan metode mikrodilusi, terhadap beberapa bakteri uji yaitu Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis dan Staphylococcus aureus,. Isolat yang diperoleh berupa minyak tak berwarna yang teridentifikasi sebagai senyawa seskuiterpen furanodienon. Furanodienon menunjukkan aktivitas antibakteri dengan nilai MIC dan MBC 125,0 dan 250,0 µg/mL .

IN VITRO ANTIBACTERIAL ACTIVITY OF CHALCONE DERIVATIVES FROM Kaempferia pandurata RHIZOMES AGAINST CLINICAL ISOLATE BACTERIA Soerya Dewi Marliyana; Yana Maolana Syah; Didin - Mujahidin
ALCHEMY Jurnal Penelitian Kimia Vol 13, No 1 (2017): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.13.1.4232.41-51

In vitro antibacterial activity of chalcone derivatives from “temu kunci” (K. pandurta) rhizomes against clinical isolate bacteria has been done. Two chalcone derivatives, panduratin A (1) and 4-hydroxypanduratin A (2) were isolated from Kaempferia pandurata rhizomes. Isolation of the chemical components were done with extraction (maceration), vacuum liquid chromatography and radial chromatography methods. The structures were determined by NMR spectroscopy (1H-NMR, 13C-NMR, 1D and 2D), then compare with data from literatures. Antibacterial activity was carried out with reference to the CLSI microdilution method, against eight clinical isolate bacteria such as Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Enterobacter aerogenes, Pseudomonas aeruginosa, Salmonella typhi, Shigella dysentriae and Vibrio cholerae. Compounds 1 and 2 showed significant antibacterial activity with highest activity against S. aureus and B. subtilis with MIC values of 2.4 to 18.8 µg/mL and MBC values of 4.8 to 37.5 µg/mL. These results showed these compounds as potential antibacterial agent for clinical isolate bacteria.

Antibacterial Activity of Germacrone Sesquiterpene from Curcuma Xanthorrhiza Rhizomes Hartiwi Diastuti; Yana Maolana Syah; Lia Dewi Juliawaty; Marlia Singgih
ALCHEMY Jurnal Penelitian Kimia Vol 12, No 2 (2016): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.12.2.1726.103-111

The aim of this research was to isolate and indentify the terpenoid compound from Curcuma xanthorrhiza rhizomes and its antibacterial activity. Isolation was carried out by using vacuum liquid chromatography and centrifugal chromatography. The structure was determined by NMR spectroscopy (1H-NMR, 13C-NMR 1D and 2D), then compare with data from literatures. Antibacterial test was carried out by using microdillution methods and evaluated against eight bacteria. They are Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Enterobacter aerogenes, Pseudomonas aeruginosa, Salmonella typhi, Shigella dysentriae and Vibrio cholerae. The result showed that the isolate was a white crystal which was indetified as germacron-type sesquiterpene. Germacron have highest activity againts P. aeruginosa, MIC 15.6 µg/mL and MBC 31.2 µg/mL.

Improvement of Student Critical Thinking Skills with the Natural Product Mini Project Laboratory Learning Aliefman Hakim; Liliasari Liliasari; Asep Kadarohman; Yana Maolana Syah
Indonesian Journal of Chemistry Vol 16, No 3 (2016)
Publisher : Universitas Gadjah Mada

This research aims to investigate effect of learning using natural product mini project laboratory on students’ critical thinking skills. The research was conducted on sixth semester of 59 students of chemistry and chemistry education program from one of the state universities in West Nusa Tenggara, Indonesia in 2012/2013. This research revealed class where the student learn using natural product mini project laboratory had more critical thinking skills than those using verification laboratory. The average n-gain of critical thinking skills for experiment class was 0.58 while for the control class was 0.37. The highest n-gain in the experiment class was 0.70 for “deciding on an action (selecting criteria to judge possible solutions) indicators”, while the smallest n-gain was 0.47 for “the making and judging value of judgments (balancing, weighing, and deciding) indicators. We concluded that the natural product mini project laboratory was better than verification laboratory in improving the students’ critical thinking skills.

Co-Authors A.A. Ketut Agung Cahyawan W Achmad Saifuddin Noer Affrida Affrida Aisyah Aisyah Aisyah Aisyah Alan Jefferson Aliefman Hakim Asep Aripin Asep Kadarohman Azzania Fibriani Bambang Ariwahjoedi Buchari Buchari Buchari Buchari Bunbun Bundjali Deana Wahyuningrum Debbie Soefie Soefie Dessy Natalia Devitri Amisa Dian Nugraheni Didin - Mujahidin Didin Mujahidin Didin Mujahidin Didin Mujahidin Didin Mujahidin Didin Mujahidin Didin Mujahidin Didin Mujahidin Dikhi Firmansyah Eliza Eliza Elvira Hermawati Elvira Hermawati Emilia L Ghisalberti Emilia L. Ghisalberti Emilio L Ghisalberti Endang Rosdiana Eri Bachtiar Eri Bakhtiar Euis Holishotan Hakim Euis Holisotan Hakim Euis Holisotan Hakim Euis Holisotan Hakim Euis Holisotan Hakim Euis Holisotan Hakim Euis Holisotan Hakim Euis Holisotan Hakim Euis Holisotan Hakim Euis Holisotasn Hakim Feraliana Feraliana Ferlinahayati Ferlinahayati Firdaus, Firdaus Hanapi Usman Hartiwi Diastuti Hartiwi Diastuti Hartiwi Diastuti Haryoto Haryoto Hendra Helmanto Hernandi Sujono Hiromitsu Takayama Hiromitsu Takayama I Dewa Agung Panji Dwipayana I Nyoman Adi Winata Ihsanawati Ihsanawati Ikram M. Said Ilim Ilim Ilimu, Edi Iqbal M. Choudhary Jalifah Latip Jalifah Latip Joko Santoso Kholifatu Rosyidah Laily Bin Din Lia Dewi Juliawati Lia Dewi Juliawati Lia Dewi Juliawaty Lia Dewi Juliawaty Lia Dewi Juliawaty Liliasari Liliasari Lukman Makmur Lukman Makmur Lukman Makmur Lukman Makmur Lukman Makmur Lukman Makmur M I Choudhary Marc Jeannin Mariko Katajima Mariko Kitajima Mariko Kitajima Marlia Singgih Marlia Singgih Marlia Singgih Masatake Niwa Melina Melina Muhamad Abdulkadir Martoprawiro Muhammad N. Jalaluddin Muhtadi Muhtadi Nanik Siti Aminah Nia Sri Hardianti Nila Berghuis Tamaela Nila Berghuis Tamaela, Nila Berghuis Nizar Happyana Nizar Happyana Nordin Hj Lajis Norio Aimi Norio Aimi Norio Aimi Noviany Noviany Nunuk H Soekamto Nunuk Hariani Soekamto Purkan Purkan Reza Aditama Rusjdi Tamin Sadijah Achmad Sahidin . Sahidin Sahidin Senadi Budiman Siti Nurbayti Siti Zubaidah Sjamsul Arifin Achmad Sjamsul Arifin Achmad Sjamsul Arifin Achmad Sjamsul Arifin Achmad Sjamsul Arifin Achmad Sjamsul Arifin Achmad Sjamsul Arifin Achmad Sjamsul Arifin Achmad Soerya Dewi Marliyana Sri Atun Suci Zulaikha Hildayani Sukrido Sukrido Suwandri Suwandri Suwandri Suwandri Tia Setiawati Tjodi Harlim Tri Cahyanto Valentina Adimurti Valentina Adimurti Kusumaningtyas Wasinton Simanjuntak Windayani, Neneng Yaya Rukayadi Yuliana, Trisna Zakaria Zakaria

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