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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Ilmiah Teknik Sipil Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Jurnal Veteriner Bumi Lestari Ecotrophic, Journal of Environmental Science Kappa Journal International Journal of Engineering and Emerging Technology Jurnal Media Sains Jurnal Syntax Transformation

I Nengah Simpen

Program Studi Kimia FMIPA Universitas Udayana, Bukit Jimbaran, Bali

Author-ID : 2920838

Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Veterinary Other

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EKSTRAKSI DAN KARAKTERISASI HIDROKSIAPATIT DARI LIMBAH KERAJINAN TULANG SAPI MENGGUNAKAN METODE KOMBINASI ALKALI HIDROTERMAL DENGAN DEKOMPOSISI TERMAL I Gede Andy Andika Parahita; I Nengah Simpen; Ni Gusti Ayu Made Dwi Adhi Suastuti
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 2 Juli 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Penelitian ini bertujuan untuk mengekstraksi hidroksiapatit dari limbah kerajinan tulang dan mengkarakterisasinya. Metode yang digunakan adalah metode kombinasi alkali hidrotermal dengan dekomposisi termal, yang dilakukan dengan cara menginteraksikan serbuk tulang dengan NaOH 5% dan dikalsinasi pada suhu 400, 750, 950 dan 1100oC (TB1, TB2, TB3 dan TB4). Nilai yield hidroksiapatit rata-rata yang dihasilkan adalah 68,82%. Karakterisasi kebasaan permukaan tertinggi dimiliki TB1 adalah 2,8345 ± 1,5166 x 10-2 mmol/gram. Karakterisasi FTIR menghasilkan gugus fungsi yang sesuai dengan senyawa hidroksiapatit. Luas permukaan tertinggi dimiliki TB1 adalah 34,4811 m2/gram. Perbandingan Ca/P rata-rata yang didapatkan adalah 1,6838. Karakterisasi XRD menunjukkan penambahan suhu mengakibatkan puncak difraksi yang dihasilkan semakin tajam yang menunjukkan struktur kristal yang dihasilkan semakin tajam.

SINTESIS KOMPOSIT SELULOSA SERBUK GERGAJI KAYU KAMPER-LIMBAH PLASTIK LDPE (LOW DENSITY POLIETHYLENE) DENGAN REAGEN FENTON SEBAGAI AGEN PENGKOPLING Hudi Nurwendi; I Nengah Simpen; I Made Sutha Negara
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 1 Januari 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

This research was on the synthesis of cellulose composites from camphor wood sawdust with LDPE waste (cellulose-LDPE) and Fenton reagent (H2O2/Fe2+) as the coupling agent. This study was divided into three steps: preparation, variation of LDPE composition and H2O2 concentration, and characterization. Preparation was done with cellulose extraction of sawdust and LDPE plastic waste purification. Variation was performed to determine the effect of compositions of LDPE on composites celullose-LDPE and H2O2 concentration on Fenton reagent. Characterization was done by testing the physical properties and functional groups using FTIR analysis. The best values of the physical property were obtained from cellulose-LDPE composition ratio of 1:5 on 1.5% H2O2. These were MOE (Modulus of Elasticity) of 12.71 MPa, MOR (Modulus of Rupture) of 200.24 MPa and density of 0.7936 g/cm. FTIR analysis showed the higher the composition of LDPE, the higher the wavenumber for OH and the increase of H2O2 concentration increased the C-H wavenumber functional groups.

SINTESIS DAN KARAKTERISASI EDIBLE FILM BERBAHAN BAKU GELATIN HASIL ISOLASI KULIT CEKER AYAM BROILER I Made Sutha Negara; I Nengah Simpen
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 1 Januari 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The research of synthesis and characterization of edible films base material on gelatin which is isolated from chiken feet skin of broiler has been carried out. The gelatin of isolation product as raw material to produce edible film, through determination of optimum condition with the study variaty concentrations of gelatin (%, m/v) such as 10%, 18%, and 20%, and variety concentrations of glycerol plastisizer (% m/v) such as 1.0%; 1.8%; and 2.0% or the ratio of gelatin and glycerol was 10:1. The edible films which produced was analyzed its quality, to determine characteristic of physico-chemical properties such as water content, solubility edible films in water and fuctional groups by infrared (FTIR). The gelatin without treatment (without mixture with glycerol) as control. The research showed that increasing glycerol (plastisizer) content can increase water content and solubility edible film in water, because glycerol properties which more easy to bond with water molecular so that good solubility in water. The analysis result of FTIR showed that the adition of glycerol can move absorption, generally increasing on amide A, amide II and amide III. The analysis result of LIBS showed that the intensity of atomic content such as C atom on wavelenght of 283, 426, and 723 nm, H atom on wavelenght of 434 and 484 nm, and O atom on wavelenght of 777 and 844 nm for edible films possess relative emission intensity higher then control. The edible films with gelatin and glycerol ratio 20:1.0 glycerol) indicate better properties (the best condition).

PEMANFAATAN BATU PADAS JENIS LADGESTONE TERAKTIVASI NaOH DAN TERSALUT Fe2O3 SEBAGAI ADSORBEN LARUTAN BENZENA I Nengah Simpen; I Made Sutha Negara; Ida Ayu Agung Pradnyani
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (141.374 KB)

This paper describes the adsorption of benzene by ledgestone which was activated with 4 M NaOH and coated with Fe2O3. The proportions of ledgestone and the coating used were of 10 : 1, 50 : 1, and 100 : 1. The aim of this study was to find out the ability of the stone in decreasing benzene concentration in solution. The study included the determination of surface acidity by acid-base titration, characterization of the ledgestone specific surface area by the method of blue methylene, determination of equilibration time of the stone in adsorbing benzene and determination of adsorption capacity of the stone referred to Freundlich isotherm adsorption by the application of gas chromatography.The result showed that the highest surface acidity of 0.2980 mmol/g was given by the ledgestone that was activated with 4 M NaOH and coated with Fe2O3 with the proportion of 10 : 1 and washed by aquadest. This ledgestone also showed the highest adsorption capacity which was 44.1286 ?g/g. The control ledgestone had specific surface area of 35.880 m2/g. The ledgestone that was activated with 4 M NaOH and coated with Fe2O3 resulted in higher adsorption capacity to benzene than the control ledgestone did.

MODIFIKASI LEMPUNG BENTONIT TERAKTIVASI ASAM DENGAN BENZALKONIUM KLORIDA SEBAGAI ADSORBEN ZAT WARNA RHODAMINE B Ni Putu Widya Tironika Dewi; I Nengah Simpen; I Wayan Suarsa
Jurnal Kimia (Journal of Chemistry) Vol. 11. No. 1 Januari 2017
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Telah dilakukan penelitian tentang modifikasi lempung bentonit yang teraktivasi asam dan terinterkalasi surfaktan sebagai adsorben dalam penyerapan zat warna rhodamine B. Asam yang digunakan untuk aktivasi adalah asam sulfat 1,5 M dan surfaktan untuk interkalasi digunakan surfaktan benzalkonium klorida (BKC) dengan variasi konsentrasi 0,1; 0,5; dan 1% (v/v). Karakterisasi adsorben dilakukan dengan metode difraksi sinar-X untuk menentukan perubahan basal spacing d001 dan spektrofotometer FTIR untuk menentukan gugus fungsional yang terkandung pada adsorben. Hasil penelitian menunjukkan terjadinya perubahan basal spacing d001 untuk adsorben Ao, Aa, Aa0,1, Aa0,5, dan Aa1 secara berturut-turut adalah 17,3312; 17,1642; 16,1432; 16,1680; dan 19,7156 Å. Nilai keasaman permukaan tertinggi dimiliki oleh adsorben Aa0,1 yaitu sebesar 1,8657 ± 0,0111 mmol/g. Sementara nilai luas permukaan untuk adsorben Ao, Aa, Aa0,1, Aa0,5 dan Aa1 secara berturut – turut adalah 89,6888; 90,1982; 90,3896; 90,3110; dan 90,3053 m2/g. Waktu optimum adsorpsi 90 menit dapat mengadsorpsi adsorbat sebanyak 22,0944 mg/g. Kapasitas adsorpsi tertinggi dimiliki oleh adsorben terinterkalasi BKC 0,1% (Aa0,1) yaitu sebesar 10,6905 mg/g, dengan mengikuti model Freundlich dengan koefisien linier (R2) 0,980.

ADSORPSI DAN DESORPSI Cr(VI) PADA ADSORBEN BATU CADAS KARANGASEM HASIL LIMBAH KERAJINAN CANDI BALI TERAKTIVASI NaOH DAN TERSALUT Fe(OH)3 I Made Dupi Andika; I Nengah Simpen; Ketut Gede Dharma Putra
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 1 Januari 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

This research discusses the adsorption-desorption of Cr(VI) by the adsorbent made from Karangasem cadas rock which is the waste of Balinese temple production. The adsorbent was activated with NaOH and coated with Fe(OH)3. The aim of the study was to investigate the capability of cadas rock in Cr6+ adsorption. The rock was activated with various concentrations of NaOH followed by coating process with Fe(OH)3. Each adsorbent was characterized for its specific surface area and surface acidity. The equilibrium time, adsorption isotherms and adsorption capacity were also investigated. The adsorbent with the highest adsorption capacity was then desorbed using HNO3 2 mol/L, NaOH 1 mol/L, and saturated NH4Cl. The result suggested that the highest surface acidity was showed by the control adsorbent which was 0.2836 ± 0.0106 mmol/g with an acid site of 1.7079 x 1020 atoms/g. The highest spesific surface area was showed by the adsorbent activated with 6M NaOH and coated with Fe(OH)3, which was 34.5042 m2/g. The highest adsorption capacity was showed by the same adsorbent, which was 2.5253 mg/g with interaction time of 15 minutes at pH 5. This met the pattern of Langmuir adsorption isotherm. HNO3 was the most effective desorption substance resulted in a percentage of Cr desorbed of 2,15%.

PELESTARIAN SUBAK MELALUI PEMBERDAYAAN ANGGOTANYA DALAM PEMBUATAN PAKAN TERNAK SAPI BALI ALTERNATIF KOMBINASI JERAMI PADI DAN BATANG PISANG SECARA FERMENTASI I. N. Simpen; I. M. Sutha Negara; N.G.A.M. Dwi Adhi S.; M. Arsa; N.L. Arpiwi
Buletin Udayana Mengabdi Vol 15 No 2 (2016): Jurnal Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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The activity in Subak Dangin Alas Desa Lodtunduh Ubud, to be aim for producing woof of bali cattlealternative by fermentation of mixture banana culm and rice straw which has been carried out from May toSeptember. The activity of subscribers of subak sustainability and continuesly, it is expected to impact onmaintenance of the subak in its village. In this activity, have been done survey, producing of cattle woofalternative, socialized, training, accompanying and giving woof to their cattles. In producing of woof of balicattle, it was done by cutting byproduct of banana culm and rice straw to be size 3-5 cm, then dried 1-2 daysfor reducing water content and then the fermentor (active microorganism and molasses) and mixture of riceand bran are distributed on its byproduct. The final step, it has been done fermentation for minimum 7 days.The activity result, subscribers of subak were very anthusiastic. Generally, participants have yet tounderstand detail procedure to make cattle woof alternative which is healthful, natural and preserve byfermentation, so that the application of technology is useful. The cattles may consume its fermentationproduct.

TEKNIK PENAMPUNGAN DAN FERMENTASI AIR KENCING SAPI BALI DI DESA DAUH YEH CANI, BADUNG MENJADI PUPUK ORGANIK RAMAH LINGKUNGAN IM.S. Negara; Simpen Simpen; Arsa Arsa; Diantariani Diantariani; Miwada Miwada
Buletin Udayana Mengabdi Vol 7 No 1 (2008): Volume 7 No.1 – April 2008
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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ABSTRACT The activity was carried out to put to use of the urine cattle bali with fermented technology. The activity of community servece was ccaried out at Dauh Yeh Cani village, Badung regency, on Suturday, 4 August 2007. The participants from the farmers group at Dauh Yeh Cani village. The demo plots was carried out at KUBE KMM. The material of a demo plots i.e. a removal by product (urine) with feces and than its were fermented.. The products made from the activity were liquied fertilizer organic (clean governunt). The participants were curious to follow all the activities and hope for the team Unud be able to came again with a news information.

TEKNOLOGI PENGAWETAN RAMAH LINGKUNGAN UNTUK PENGERAJIN BAMBU TRADISIONAL BERORIENTASI EKSPOR DI DESA BELEGA GIANYAR I.M.S. Negara; I.N. Simpen; G.M.A. Sasmita
Buletin Udayana Mengabdi Vol 16 No 3 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Tujuan kegiatan pengabdian ini adalah (1) dihasilkan bambu awet yang ramah lingkungan (biodegradable) sebagai bahan baku kerajinan bambu berorientasi ekspor, dengan cara gravitasi di mitra Setiana Bamboo Furniture dan (2) meningkatkan mutu dan kualitas hasil kerajinan bambu untuk bisa bersaing di pasaran lokal, nasional bahkan internasional, sehingga kelangsungan industri mitra dapat dipertahankan dan tentunya juga pendapatan perajin bambu menjadi meningkat. Untuk pencapaian tujuan tersebut, peningkatan mutu dan kualitas produk kerajinan bambu akibat terserang kumbang bubuk, maka bahan baku kerajinan perlu diawetkan sebelum dilakukan proses pengerjaan lebih lanjut menggunakan bahan pengawet biodegradable khitosan, yang disolasi dari kulit udang limbah restoran seafood. Proses pengawetan yang dilakukan sifatnya mengganti cairan (zat pati) yang disukai oleh kumbang bubuk dengan larutan pengawet khitosan. Dari hasil pelaksanaan kegiatan IbM, mitra saat ini telah memiliki alat pengawetan cara gravitasi dengan pengerjaan yang relatif mudah dan cepat serta dengan bahan pengawet khitosan yang aman dan ramah lingkungan serta larutan pengawet dapat ditampung kembali untuk dimanfaatkan ulang (reuse). Secara umum, masalah yang dihadapi sebelum pelaksanaan IbM, dapat teratasi.

PENGAWETAN RAMAH LINGKUNGAN PADA USAHA BAMBU TRADISIONAL BERORIENTASI EKSPOR DI DESA BELEGA GIANYAR IM. Sutha Negara; IN. Simpen; G.M. Arya Sasmita
Buletin Udayana Mengabdi Vol 16 No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1150.625 KB)

Tujuan kegiatan Ipteks bagi Masyarakat (IbM) ini adalah (1) dihasilkan bambu awet yang ramah lingkungan (biodegradable) sebagai bahan baku kerajinan bambu berorientasi ekspor, dengan cara gravitasi di mitra Setiana Bamboo Furniture dan (2) meningkatkan mutu dan kualitas hasil kerajinan bambu untuk bisa bersaing di pasaran lokal, nasional bahkan internasional, sehingga kelangsungan industri mitra dapat dipertahankan dan tentunya juga pendapatan perajin bambu menjadi meningkat. Untuk pencapaian tujuan tersebut, peningkatan mutu dan kualitas produk kerajinan bambu akibat terserang kumbang bubuk, maka bahan baku kerajinan perlu diawetkan sebelum dilakukan proses pengerjaan lebih lanjut menggunakan bahan pengawet biodegradable khitosan, yang disolasi dari kulit udang limbah restoran seafood. Proses pengawetan yang dilakukan sifatnya mengganti cairan (zat pati) yang disukai oleh kumbang bubuk dengan larutan pengawet khitosan. Dari hasil pelaksanaan kegiatan IbM, mitra saat ini telah memiliki alat pengawetan cara gravitasi dengan pengerjaan yang relatif mudah dan cepat serta dengan bahan pengawet khitosan yang aman dan ramah lingkungan serta larutan pengawet dapat ditampung kembali untuk dimanfaatkan ulang (reuse). Secara umum, masalah yang dihadapi sebelum pelaksanaan IbM, dapat teratasi.

Co-Authors A A I Rahma Prabawanti A.A. B. Putra Anak Agung Gde Raka Dalem Anastasia Victor, Agnes Maria Salvi Arsa Arsa D. A. D. N. Dewi D.M Priyantha Wedagama Dewik Setiyawati Dwi Adhi S, Ni Gusti Ayu Made Dwi Anggraeni Putri Suandi Ewa Satriawijaya Febby Hartesa W G M Arya Sasmita G.M.A. Sasmita Gunawan, A. A. Ngurah Gusti Ngurah Sutapa Hudi Nurwendi I Gde Antha Kasmawan I Gede Andy Andika Parahita I M. S. Negara I M. S. Negara I M. S. Negara I M. Trimastiya I Made Dupi Andika I Made Sutha Negara I Made Sutha Negara I Made Wisnu Adhi Putra I Nengah Artawan I Nengah Sandi I Nyoman Aribudiman I Nyoman Sumerta Miwada I Nyoman Suprapta Winaya I NYOMAN SUTARPA SUTAMA I Nyoman Widana I W BUDIARSA SUYASA I Wayan Redana I Wayan Suarsa I Wayan Sudiarta I Wayan Suditayasa I. M. S. Negara I.A.G. Widihati I.A.G. Widihati I.M.S. Negara Ida Ayu Agung Pradnyani Ida Bagus Made Suryatika Ika Umratul IM.S. Negara Ketut Gede Dharma Putra Komang Yogi Purnamawati M. Arsa M. Indra Dwitama M. W. Prayani Made Indra Dwitama Made Suryatika, Ida Bagus Muhammad Nasib N. K. A. Oktapiani N. K. D. Astuti N.M. Puspa wati Nanik Ayumi Ni G. A. M. Dwi Adhi Suastuti Ni Ketut Suminten Ni Komang Tria Paramita Septiari Ni LUH ARPIWI Ni Luh Eka Anggarayanti Ni Luh Nyoman Kebayantini Ni Luh Putu Suciptawati Ni Made Puspawati Ni Made Widya Pratiwi Ni Nyoman Pujianiki Ni Nyoman Rupiasih Ni Putu Diantariani Ni Putu Gita Bonita Dewi Ni Putu Widya Tironika Dewi Ni Wayan Trisnadewi, Ni Wayan O. Ratnayani O. Ratnayani O. Ratnayani Oka Ratnayani Olivia Carolyn Sitepu Prawistya Putra, I Made Gede Mas Putra Adnyana, I Gusti Agung Putra, Anak Agung Bawa Putu Suarya R. Dalem S. R. Mustikawati Sihotang, Erikson Sihotang, I Nyoman Sitanggang, Katrin Walensky Siti Helmyati Siti Zulaikah Sri Rahayu Santi Tri Lestari, Komang Ayu W. A. Fauzi Y. N. Handayani Y. Ulfa

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