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All Journal CHEMISTRY PROGRESS JURNAL PIJAR Journal of Degraded and Mining Lands Management The Journal of Pure and Applied Chemistry Research Jurnal Riset Kimia Indonesian Journal of Chemistry Molekul: Jurnal Ilmiah Kimia Acta Chimica Asiana Jurnal Abdi Insani Jurnal Warta Desa (JWD) Jurnal Pijar MIPA Jurnal Pepadu Jurnal Pengabdian Inovasi Masyarakat Indonesia
Dina Asnawati
Department Of Chemistry, Faculty Of Mathematic And Natural Science, University Of Mataram, Indonesia
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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ALAT DESTILASI SEDERHANA SEBAGAI MEDIA EDUKASI UNTUK MENINGKATKAN MINAT WIRAUSAHA SISWA-SISWI SMA IT AL KAMAL NW NARMADA Asnawati, Dina; Hamdiani, Saprini; Sudarma, I Made; Ismilayli, Nurul
Jurnal PIJAR Vol 10, No 1 (2015)
Publisher : Jurnal PIJAR

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

Abstract

Pendidikan yang berkualitas adalah sarana untuk mewujudkan kemandirian suatu bangsa. Peningkatan Sumber Daya Manusia perlu dilakukan dalam setiap aspek kehidupan. Akan tetapi, dalam pelaksanaannya menghadapi banyak kendala terutama dalam hal sarana dan prasarana terutama bagi sekolah-sekolah swasta di pedesaan. Salah satunya adalah SMA IT Al Kamal NW Narmada yang terletak di Desa Golong Kecamatan Narmada. Sekolah yang berdiri tahun  2008 ini belum memiliki fasilitas ruang dan alat laboratorium. Hal ini sangat menyulitkan siswa untuk dapat memahami konsep-konsep IPA secara lebih mendalam tanpa disertai praktikum. Sehingga perlu dilakukan inovasi dengan memanfaatkan barang-barang bekas yang mudah diperoleh untuk dijadikan alat peraga sederhana. Salah satu inovasi yang dilakukan adalah perancangan dan pembuatan sendiri alat praktikum destilasi sederhana, untuk membantu siswa memahami konsep destilasi serta penerapannya dalam industri. Diharapkan pengabdian ini akan meningkatkan kreatifitas dan minat para siswa/siswi SMA IT Al Kamal untuk mengembangkan penggunaan alat destilasi sederhana tersebut dalam bidang praktis seperti pertanian sehingga dapat juga menigkatkan jiwa kewirausahaan siswa.
SINTESIS POLIURETAN DARI ASAM LEMAK TEROKSIDASI MINYAK INTI BUAH NYAMPLUNG MELALUI PROSES POLIMERISASI MENGGUNAKAN TOLUEN DIISOSIANAT Suhendra, Dedy; Solehah, Anggi; Asnawati, Dina; Gunawan, Erin Ryantin
CHEMISTRY PROGRESS Vol 6, No 2 (2013)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.6.2.2013.3496

Abstract

Produksi poliuretan sebagian besar bersumber dari poliol yang berasal dari minyak bumi. Namun minyak bumi merupakan bahan baku yang tidak dapat diperbaharui. Dengan demikian perlu dicari bahan baku alternatif untuk pembuatan poliol sebagai bahan baku poliuretan. Telah dilakukan penelitian sintesis poliuretan dari asam lemak teroksidasi minyak inti buah nyamplung melalui proses polimerisasi menggunakan toluen diisosianat dengan tujuan untuk mengetahui apakah asam lemak minyak inti buah nyamplung dapat dijadikan sebagai bahan baku pembuatan poliuretan dan mengetahui karakteristik poliuretan dari asam lemak minyak inti buah nyamplung. Dari hasil penelitian, asam lemak minyak inti buah nyamplung dapat dijadikan sebagai bahan baku pembuatan poliuretan dengan cara mentransformasi asam lemak menjadi poliol melalui reaksi epoksidasi. Diperoleh perubahan sifat fisiko kimia dari asam lemak menjadi poliol yaitu warna kuning muda menjadi putih kekuningan, indeks bias dari 1,451 menjadi 1,458 dan bilangan iod dari 87 mg iod/g asam lemak menjadi 29 mg iod/g poliol. Persen (%) konversi poliol yang diperoleh dari asam lemak adalah 66,67%, sedangkan persen(%) konversi poliuretan dari poliol adalah 83,73%. Karakteristik poliuretan dari asam lemak minyak inti buah nyamplung yaitu berwarna coklat muda, elastis, homogen, keras dan berbentuk membran.Most of polyurethan production are from polyol that was made from petroleum. Petroleum are material which is un-renewable. Thus, it’s necessary to find an alternative materials to produce polyol as polyurethane raw materials. A research abaut polyurethane synthesis from oxidation fatty acid nyamplung seeds oil through polimerization proces with toluene diisocyanate have been done in order to know are the fatty acid nyamplung seeds oil could be raw materials to make polyurethane and to know polyurethane characteristic from fatty acid nyamplung seeds oil. From the research result, fatty acid nyamplung seeds oil could be use as raw materials ofpolyurethane by transforming fatty acid into polyol through epoxidation reaction. The result are the change ofphysicochemical characters from fatty acid into polyol which is light yellow to white yellowish color, the refractive index from 1,451 to 1,458 and the iodine number from 87 mg iod/gr fatty acid to 29 mg iod/gr polyol. Percentage (%) conversion polyol from fatty acid are 66,67% and percentage (%) conversion polyurethane from polyol are 83,73%. The polyurethane characteristic from fatty acid nyamplung seeds oil are light brown, homogen,elastics, hard and in form of membrane.
Sintesis Senyawa-Senyawa Epoksi dari Asam Lemak Minyak Nyamplung (Calophyllum inophyllum L.) Murniati, Murniati; Gunawan, Erin Ryantin; Suhendra, Dedy; Asnawati, Dina -; Qurba, Pujana
Jurnal Riset Kimia Vol 13, No 1 (2022): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i1.447

Abstract

Epoxidation is a reaction of a carbon double bond with active oxygen, which results in the addition of an oxygen atom, converting the original double bond into a three-membered epoxide (oxirane) ring. Generally, the raw material for making epoxy comes from petroleum. Nyamplung kernel oil is a non-edible oil that can be used as an alternative raw material for making epoxy derivatives. The purpose of this study was to determine the optimum conditions and characterization of epoxy materials. The fatty acids of Nyamplung kernel oil were reacted formic acid and hydrogen peroxide with sulfuric acid as a catalyst. The optimum condition of the following parameters on the study of this process was investigated: the epoxidation time, temperature, and the mole ratio of formic acid and hydrogen peroxide. The results showed that the optimum reaction conditions with the temperature was 65 oC, the mole ratio of formic acid and hydrogen peroxide was 1:6, and the reaction time was 75 minutes. The results of the characterization under optimum conditions showed the oxirane value of 1.69, the iodine number of 9.63 mg iod/100 g, and the epoxy conversion of 67.6 %. The results of FTIR characterization showed absorption at a wavenumber of 820.03 cm-1 which is a specific absorption from the oxirane ring of the epoxy compound.
Metabolite Variation of Peanut Hulls (Arachis hypogaea L.) from Three Locations of Lombok Island on the Basis of GC-MS Analysis Surya Hadi; Dina Asnawati; Baiq Mariana; Hijriati Sholehah; Andhina Rizkya Satriani; Seto Priyambodo
The Journal of Pure and Applied Chemistry Research Vol 6, No 3 (2017): Edition of September - December 2017
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1025.206 KB) | DOI: 10.21776/ub.jpacr.2017.006.03.328

Abstract

This article is a part of studies to investigate the potential of natural products from Lombok Island for antidiabetic agents. This study was directed to learn the metabolite variations of peanut hulls collected from three different locations in Lombok Island. The hull samples were extracted in methanol, followed by partition process into three fractions using three solvents with varied polarities (dichloromethane, hexane and acetone). The fractions were then separated and identified for their chemical composition by using GC-MS instrument. Metabolite variations of three extracts showed that the antidiabetic compounds stigmast-5-en-3-ol and oleic acid were found in all three locations with different percentages of abundance. Another antidiabetic compound, linoleic acid, was only identified in peanut hulls from the village of Pringga Jurang (PJ). Besides the antidiabetic compounds, there were other major compounds with known biological activities discussed to find other uses of the hulls.
Sintesis Senyawa-Senyawa Epoksi dari Asam Lemak Minyak Nyamplung (Calophyllum inophyllum L.) Murniati Murniati; Erin Ryantin Gunawan; Dedy Suhendra; Dina Asnawati; Pujana Qurba
Jurnal Riset Kimia Vol. 13 No. 1 (2022): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i1.447

Abstract

Epoxidation is a reaction of a carbon double bond with active oxygen, which results in the addition of an oxygen atom, converting the original double bond into a three-membered epoxide (oxirane) ring. Generally, the raw material for making epoxy comes from petroleum. Nyamplung kernel oil is a non-edible oil that can be used as an alternative raw material for making epoxy derivatives. The purpose of this study was to determine the optimum conditions and characterization of epoxy materials. The fatty acids of Nyamplung kernel oil were reacted formic acid and hydrogen peroxide with sulfuric acid as a catalyst. The optimum condition of the following parameters on the study of this process was investigated: the epoxidation time, temperature, and the mole ratio of formic acid and hydrogen peroxide. The results showed that the optimum reaction conditions with the temperature was 65 oC, the mole ratio of formic acid and hydrogen peroxide was 1:6, and the reaction time was 75 minutes. The results of the characterization under optimum conditions showed the oxirane value of 1.69, the iodine number of 9.63 mg iod/100 g, and the epoxy conversion of 67.6 %. The results of FTIR characterization showed absorption at a wavenumber of 820.03 cm-1 which is a specific absorption from the oxirane ring of the epoxy compound.
ALAT DESTILASI SEDERHANA SEBAGAI MEDIA EDUKASI UNTUK MENINGKATKAN MINAT WIRAUSAHA SISWA-SISWI SMA IT AL KAMAL NW NARMADA Dina Asnawati; Saprini Hamdiani; I Made Sudarma; Nurul Ismilayli
Jurnal Pijar Mipa Vol. 10 No. 1 (2015): Maret
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (249.701 KB) | DOI: 10.29303/jpm.v10i1.20

Abstract

Abstrak: Peningkatan Sumber Daya Manusia dalam pelaksanaannya menghadapi banyak kendala terutama  dalam  hal  sarana  dan  prasarana  terutama  bagi  sekolah-sekolah  swasta  di  pedesaan Lombok  Barat.  Salah  satunya  adalah  SMA  IT  Al  Kamal  NW  Narmada  yang  terletak  di  Desa Golong Kecamatan Narmada, Lombok Barat. Sekolah yang berdiri tahun  2008 ini belum memiliki fasilitas  ruang  dan  alat  laboratorium.  Hal  ini  sangat  menyulitkan  siswa  untuk  dapat  memahami konsep-konsep  IPA  secara  lebih  mendalam  tanpa  disertai  praktikum.  Sehingga  perlu  dilakukan inovasi  dengan  memanfaatkan  barang-barang  bekas  yang  mudah  diperoleh  untuk  dijadikan  alat peraga  sederhana.  Salah  satu  inovasi  yang  telah  dilakukan  adalah  perancangan  dan  pembuatan sendiri  alat  praktikum  destilasi  sederhana,  untuk  membantu  siswa  memahami  konsep  destilasi serta penerapannya dalam industri. Diharapkan pengabdian ini akan meningkatkan kreatifitas dan minat  para  siswa/siswi  SMA  IT  Al  Kamal  untuk  mengembangkan  penggunaan  alat  destilasi sederhana tersebut dalam bidang praktis seperti pertanian sehingga dapat juga menigkatkan jiwa kewirausahaan siswa.Kata kunci : alat destilasi sederhana, praktikum, wirausahaAbstract: Improvement  of  human  resources  faces  many  challenges,  especially  in  terms  of facilities and infrastructure, especially for private schools in rural, West Lombok. One of the high schools that face the same problem is the High School IT Al Kamal NW Narmada located in the village  ofGolong  District  of  Narmada,  Lombok  Barat.  School  was  established  in  2008  but  have no adequate  classroom  facilities  and  laboratory  equipment.  It  is  very  difficult  for  students  to understand  science  concepts  in  more  depth  without  laboratory  work  activity. Therefore  it  needs innovation  for  simple  laboratory  work  activity  by  utilizing  second-hand  goods  that  readilyavailable.  The  simple  innovation  that  has  been  introduced  is  to  design  and  manufacture  simple distillation  apparatus  in  order  to  help  students  understand  the  concept  of  distillation  and  its application  in  the  industry.  This  approach  is  expected  to  increase  creativity  and  interest  of  the student especially from SMA IT Al Kamal to develop simple destilation apparatus for practical purposes (e.g in agriculture) so that it is espected that student has entrepreneurs skills. Keywords :simple distillation device,  laboratory work, entrepreneur
Adsorpsi Metanil Yellow Menggunakan Karbon Aktif Limbah Cangkang Buah Kawista (Limonia Acidissima L.) Dina Asnawati; Sri Seno Handayani; Siti Raudhatul Kamali; Saprini Hamdiani; Iwan Sumarlan; Made Ganesh Darmayanti; Lala Ghina Aulia
Jurnal Pijar Mipa Vol. 15 No. 3 (2020): Juni
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.758 KB) | DOI: 10.29303/jpm.v15i3.1724

Abstract

Tujuan dari penelitian ini adalah untuk mengetahui karakteristik arang aktif serta kondisi optimum adsorpsi zat warna metanil yellow oleh arang aktif limbah cangkang buah kawista yang meliputi massa adsorben, waktu kontak, suhu dan pH. Arang aktif dibuat melalui proses aktivasi secara kimia yaitu dengan menggunakan zat aktivator HCl 1 M. Untuk mendapatkan arang aktif dengan karakteristik yang baik ditinjau dari kadar air, kadar abu dan kadar zat menguap. Hasil penelitian menunjukkan bahwa arang aktif limbah cangkang buah kawista yang diaktivasi dengan HCl 1 M menghasilkan arang aktif dengan karakteristik yang memenuhi standar baku mutu SNI 06-3730-1995, yaitu dengan kadar air 6,3%, kadar abu 9%, dan kadar zat menguap 3%. Hasil analisis dengan spektrofotometer FTIR menunjukkan bahwa arang aktif tersebut mempunyai gugus fungsi O–H pada 3435,13 cm-1 dan C=C pada 1621,22 cm-1. Limbah cangkang buah kawista dapat digunakan sebagai adsorben dengan kapasitas adsorpsi sebesar 5,48 mg/gram pada kondisi optimum yaitu massa 1 gram selama 90 menit dengan suhu 80 °C dan pH 7 (netral).   Kata Kunci: Adsorpsi, metanil yellow, arang aktif, cangkang buah kawista, HCl
KARAKTERISASI KATALIS Pt-Pd/ZEOLIT ALAM REGENERASI PADA REAKSI HIDRODENITROGENASI PIRIDIN Dina Asnawati
Molekul Vol 9, No 1 (2014)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (198.558 KB) | DOI: 10.20884/1.jm.2014.9.1.148

Abstract

Telah dilakukan penelitian tentang Karakterisasi Katalis Pt-Pd/Zeolit Alam Regenerasi pada Reaksi Hidrodenitrogenasi Piridin. Tujuan dari penelitian ini adalah untuk mempelajari karakter katalis Pt-Pd/zeolit alam baru, bekas dan hasil regenerasi pada hidrodenitrogenisasi piridin. Katalis Pt-Pd/zeolit alam terdeaktivasi diregenerasi dengan cara dioksidasi dengan gas O2 pada temperatur 350oC selama 2 jam, dan direduksi dengan gas H2 pada temperatur 400oC selama 1 jam. Karakterisasi katalis baru (fresh), terdeaktivasi dan terregenerasi meliputi penentuan luas permukaan, volume pori dan rerata jejari pori dengan alat Gas Sorption Analyzer NOVA-1000 berdasarkan adsorpsi gas N2 serta penentuan keasaman dengan metode adsorpsi gas amoniak. Hasil penelitian menunjukkan bahwa deaktivasi katalis menyebabkan penurunan luas permukaan spesifik, volume total pori dan keasaman katalis, sedangkan proses regenerasi pada katalis bekas dengan metode oksidasi dan reduksi meningkatkan luas permukaan spesifik, volume total pori, rerata jejari pori dan keasaman katalis.
Methylation of Eugenol Using Dimethyl Carbonate and Bentonite as Catalyst Dina Asnawati; I Made Sudarma; Emmy Yuanita; Baiq Fadila Arlina; Saprini Hamdiani; Siti Raudhatul Kamali
Indonesian Journal of Chemistry Vol 15, No 3 (2015)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (312.284 KB) | DOI: 10.22146/ijc.21193

Abstract

Eugenol is a compound with a variety of reactive functional groups such as allyl, hydroxy and methoxy. The presence of the functional groups brings eugenol possible to undertake the transformation into various derivative compounds with diverse activities. One of the simple and possible transformations is methylation or alkylation. Commonly, methyl halides and dimethyl sulphate are used as methylation agent. However, those kinds of methylation agents are toxic and carcinogenic. In this research dimethyl carbonate, an alternative methylation agent is used, because of its low toxicity, green, and economic. The synthesis has been carried out by using a catalyst. Bentonite was activated by heating to a temperature using 300 °C. Methylation was shown by the formation of a light yellow liquid (25.71% yield). The structures of products were characterized by GC-MS and obtained a compound, namely bis eugenol (4-allyl-2-methoxyphenoxy) methane (2.37% yield).
STRUCTURE ELUCIDATION OF ALKALOIDS FROM LEAVES OF Voacanga foetida (Bl.) Rolfe OF LOMBOK ISLAND Surya Hadi; Dina Asnawati; Novi Febrianti
Indonesian Journal of Chemistry Vol 10, No 2 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.473 KB) | DOI: 10.22146/ijc.21460

Abstract

The leaves of Voacanga foetida (Bl.) Rolfe, have been used ethnomedically for the treatment of wounds, itches, and swellings particularly in Lombok island. A phytochemical study has been done to investigate chemical compounds responsible against the cause of the diseases. By separating alkaloidal fraction from the leaves was found voacristine 1 as the major alkaloidal compound, and voacangine 2 and coronaridine 3 as the minor components. The structure elucidation of the compounds was carried out on the basis of spectroscopy data. A structure revision of voacristine 1 was also reported.
Co-Authors Ahmadun Azwari Ali Djamhuri Andhina Rizkya Satriani Anggi Solehah Baiq Fadila Arlina Baiq Mariana Bakti Abdillah Dedy Suhendra Dhony Hermanto Emmy Yuanita Erin Ryantin Gunawan Erin Ryantin Gunawan Farid Wajdi Ganesh Darmayanti HIJRIATI SHOLEHAH I Made Sudarma I MADE SUDARMA Iwan Sumarlan Jurnal Pepadu Khairul Pahmi Rahmawati L M Riza Rahman Hidayat Lala Ghina Aulia Lalu Riza Mahendra Lely Kurniawati Made Ganesh Darmayanti Made Ganesh Dharmayanti Made Ganesh Dharmayanti Mozaik Al Qharomi Murniati . Murniati Murniati Novi Febrianti Nurul Ismilayli Nurul Ismilayli Nurul Ismilayli, Nurul Pujana Qurba Qurba, Pujana Rosita Wati Saprini Hamdiani Saprizal Hadisaputra Seto Priyambodo Siti Raudhatul Kamali Sri Seno Handayani Sudirman Sudirman Sudirman Sudirman Sudirman Surya Hadi Surya Hadi Surya Hadi Surya Hadi Teguh Rifandi Vera Fitriya Ersalena Zohrul Iskandar