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INDONESIA
PROSIDING SEMINAR KIMIA
Published by Universitas Mulawarman
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
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Articles 40 Documents
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Search results for , issue "SEMINAR NASIONAL KIMIA 2013" : 40 Documents clear
Pengaruh Lama Fermentasi Terhadap Mutu Biji Kakao (Theobroma cacao L) yang dihasilkan Petani Kakao Di Teluk Kedondong Bayur Samarinda Marwati -
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Cocoa is one of the plantation commodity whose have role in the national economy, particularly as a provider of employment and sources of income for the government. In addition, The cacao bean is also improved the incomes of cocoa farmers especially to cocoa farmer at Teluk Kedondong Bayur, Samarinda. Cocoa production in Indonesia increased significantly, but the quality of the resulting is very low. The purpose of this study to determine how long fermentation time to produce good quality of cocoa beans.Single factor experiment in completely randomized design (CRD) with three replications times used in this study. The factor variation is length of fermentation which consists of seven standards: no fermentation, 1 day, 2 days, 3 days, 4 days, 5 days, and 6 days. Data were analyzed using analysis of variance (ANOVA) with F test, if there is a real difference it will be followed by Least Significant Difference Test (BNT) with level of 5%. Result of the experiment showed that treatment with long fermentation gave significantly effect on moisture content, pH, fat content, number of seeds per 100 grams, not fermented beans levels, levels of seed germination and yield. Based on the results of testing of dry beans, the best quality treatment withfermentation time is 5 days.
AKTIVITAS ANTIOKSIDAN EKSTRAK N-HEKSANA, ETILASETAT DAN ETANOL DARI BUAH RANTI HITAM (Solanum Blumei) Ness Ex Blume DENGAN METODE PEREDAMAN DPPH Murniaty Simorangkir; Ribu Surbakti; Tonel Barus; Partomuan Simanjuntak
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Penelitian ini bertujuan untuk mengetahui aktivitas antioksidan dari ekstrak n-heksan, etilasetat dan etanol dari buah Ranti Hitam (Solanum blumei Ness ex Blume). Uji antioksidan dilakukan dengan metode peredaman DPPH (1.1-Diphenyl-2-Picrylhydrazyl). Hasil uji antioksidan menunjukkan aktivitas antioksidan tertinggi adalah ekstrak etanol dengan % inhibisi (38,72 %) dibandingkan ekstrak etilasetat (17,37 %) dan ekstrak n-heksana (3,015 %) dengan nilai IC50 dari ekstrak etanol terkecil (128,79 ppm), diikuti ekstrak etilasetat (343,37 ppm) dan ekstrak n-heksana (3570,66 ppm). Nilai IC50 (Inhibition Concentration 50) adalah konsentrasi antioksidan (µg/mL) yang mampu menghambat 50% radikal bebas. Kandungan metabolit sekunder pada ekstrak etanol buah adalah alkaloid, sedikit flavonoid, fenol dan tanin
Pupuk Hayati Berbasis Bakteri Endofit Maria Bintang; Dwi Endah Kusumawati
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Problem of low agricultural production can be caused by a reduction in agricultural area and the presence of pests and diseases. The use of inorganic fertilizers in the long term can cause negative impacts, so we need new alternative sources of fertilizer that environmentally friendly and effective against pathogens, especially on agricultural crops.Endophytic bacteria as a biocontrol agent should be developed to be biological fertilizers because of some specific strains have been shown to produce antibacterial as well as stimulate plant’s growth. Development of endophytic bacteria as a biological fertilizer would be very beneficial, good for the environment, farmers and industry.
ANALISIS TERMODINAMIKA SISTEM HIBRIDA PV/T BERDASARKAN MODEL TERMAL Dadan Hamdani; Yuki N Nasution
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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In this paper, the analysis of PV/T system with air collector have been done as an attempt to investigate the system performances based on energy and exergy analysis using thermodynamics (thermal) analysis. The experimental data for a typical day of July, 9 th 2012 for Bontang City, East Kalimantan are used for calculation of the energy, exergy, energy and exergy efficiencies of the PV and PV/T systems. It is found that varies flow of energy (thermal and electrical) from a minimum of 312 W to maximum of 522 W, the PV exergy varies from a minimum of 18 W to a maximum of 41 W corresponding to the total energy of system and PV/T exergy varies from a maximum of 117 W to a minimum of 52 W, respectively. Meanwhile, the exergy efficiency for the PV/T system varies from a maximum of 18% to a minimum of 12% and exergy efficiency for the PV system varies from a minimum of 3% to a maximum 6%.
UJI TOKSISITAS DAN PENENTUAN AKTIVITAS ANTIOKSIDAN DENGAN METODE DPPH DARI METABOLIT SEKUNDER FRAKSI n-HEKSAN, ETIL ASETAT DAN METANOL-AIR DAUN SISIK NAGA (Drymoglossum piloselloides [Linn.] Pr.) Erwin -; Dwi Fitria Sari; Chairul Saleh
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Phytochemical, toxicity test had been done that used Brine shrimp (Brine shrimp lethality test) and antioxidant activity test using methanol extract from sisik naga leaf (Drymoglossum piloselloides (Linn). Pr) fraction that taken from Kutai Kartanegara, East Kalimantan. Sisik naga leaf was extracted by methanol and then concentrated using rotary evaporator. Then that crude extract was fractioned by n-hexane, ethyl acetate and methanol-water. Based on phytochemical test of the sisik naga leaf show that crude methanol extract, n-hexane fraction and ethyl acetate fraction was contain alkaloid, flavonoid and steroid at methanol-water fraction was contain alkaloid and phenol. Brine shrimp lethality test show that lethality level of Artemia Salina (L) that used Probit SAS Analyze to determine value of Lethal Concentration 50% (LC 50 ). The test showed that the most active was crude n-Hexane extract with LC 50 value of 0,0910 ppm. Antioxidant activity test of extracts from crudge methanol and some variations fractioned using DPPH radical reduction (2,2 '-diphenyl-1-picrylhydrazil) using Spectrophotometer. The test showed that the most active and recommended to used as antioxidant is methanol-water fraction with IC 50 values is at 74.51 ppm and LC 50 values is at 87749.9219 ppm.
POTENSI EKSTRAK AIR DAUN PACAR CINA (Aglaia odorata) SEBAGAI BIOLARVASIDA TERHADAP LARVA Aedes aegypti Eka Siswanto Syamsul; Dwi Lestari; Siti Heldyana
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Biolarvasida adalah suatu larvasida yang bahan-bahannya didapat dari tumbuhan yang mengandung bahan kimia (bioaktif) yang toksik terhadap larva nyamuk Aedes aegypti namun mudah terurai (terdegradasi) di alam sehingga tidak mencemari lingkungan dan relatif aman bagi manusia. Pacar cina (Aglaia ordorata) memiliki kandungan bahan aktif minyak atsiri, alkaloid, flavonoid, dan saponin yang diduga dapat digunakan sebagai biolarvasida. Penelitian ini bertujuan untuk mengetahui potensi ekstrak air daun pacar cina sebagai biolarvasida serta untuk mengetahui kadar ekstrak air yang berkhasiat sebagai biolarvasida.Metode yang digunakan adalah metode ekperimental dengan menggunakan sampel larva Aedes aegypti yang telah mencapai instar III/IV. Pembuatan ekstrak daun pacar cina menggunakan pelarut air. Pengujian aktifitas biolarvasida dibagi menjadi 6 kelompok uji yaitu kontrol positif (bubuk abate), kontrol negatif (air), ekstrak air daun pacar cina konsentrasi 62,5 ppm, 125 ppm, 250 ppm, dan 500 ppm. Perhitungan LC 50 ekstrak air daun pacar cina dengan menggunakan analisa probit Miller-Tainner. Hasil penelitian menunjukan ekstrak air daun pacar cina 62,5 ppm (30%), 125 ppm (50%), 250 ppm (70%), 500 ppm (90%), kontrol positif (100%), dan kontrol negatif (0%) dalam waktu 24 jam pengamatan. Ekstrak daun pacar cina berpotensi sebagai biolarvasida dengan nilai LC50 sebesar 123,31 ppm.
UJI TOKSISITAS (Brine Shrimp Lethality Test) DAN AKTIVITAS HIPOGLIKEMIK DARI DAUN TERAP (Artocarpus odoratissimus B.) DENGAN METODE TOLERANSI GLUKOSA PADA MENCIT JANTAN Nur Futihah; Harlinda Kuspradini
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Phytochemical, brine shrimp lethality and antibacterial activity tests of various fraction from terap leaf (Artocarpus odoratissimus B.) from Sungai Siring, East Samarinda has been carried out. Artocarpus odoratissimus B. bark was extracted with ethanol then concentrated by rotary evaporator. The total extract was fractioned with n-hexane, and ethyl acetate. Based on the secondary metabolites phytochemical test of the Artocarpus odoratissimus B. bark show that total extract and in various fraction is contain flavonoid and steroid. Brine Shrimp Lethality Test (BSLT) method used the shrimp larvas of Artemia salina Leach to study the mortality effect that caused by the leaves extracts of Artocarpus odoratissimus B.. The data obtained was analyzed by using SAS Probit analysis. Based on the LC 50 value from the result of BSLT method, the total extract and etil asetat with the highest toxicity is n-hexane extract. Hypoglicemic activity test was conducted using glucose tolerance to the mice. In this test, have shown that the most active fraction to lower blood glucose levels using a total extrac dose is 25 mg/kg BB with the percentage reduction in blood glucose levels by 49% and extract showed the best activity in the 150 th minute.
KAJIAN KANDUNGAN PATI, AMILOSA DAN AMILOPEKTIN TEPUNG DAN PATI PADA BEBERAPA KULTIVAR PISANG (Musa spp) Miftakhur Rohmah
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Pisang merupakan salah satu buah yang cukup perspektifdalam pengembangan sumber pangan lokal dan sumber karbohidrat non beras, sehingga dapat dijadikan sumber tepung dan pati baru. Pengolahan pisang menjadi tepung dan pati pisang merupakan salah satu alternatif untuk mengurangi kehilangan pasca panen. Penelitian ini dilakukan untuk mendapatkan informasi kandungan pati beserta komponen penyusunnya berupa amilosa dan amilopektin dari pisang kapas, mahuli dan talas. Tepung dan pati pisang kapas memiliki kadar pati, amilosa dan amilopektin tertinggi yaitu 78,25 %, 18,17 % dan 60,08 %. Hasil penelitian ini dapat digunakan untuk mengetahui salah satu kriteria mutu tepung dan pati yang berasal dari pisang, baik sebagai bahan pangan maupun non-pangan.
Pengembangan Industri Kimia Berbasis Sumberdaya Alam Hayati Sebagai Alternatif Prospektif Menuju Pembangunan Nasional Berkelanjutan Hanapi Usman
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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BACK TO NATURAL BERSAMA KIMIA BAHAN ALAMKimia bahan alam dalam pengertian luas adalah semua konstituen kimiawi yang diperoleh dari alam, baik yang berasal dari hewan maupun tumbuhan termasuk pula hasil-hasil pertambangan. Namun dalam tulisan ini, yang dimaksudkan sebagai kimia bahan alam adalah konstituen “organik bahan alam” yang berasal dari sumberdaya hayati, lebih khusus metabolit sekunder yang akhir-akhir ini semakin banyak mendapat perhatian para peneliti kimia dan semakin diandalkan sebagai penopang perkembangan industri maju diberbagai negara. Selogan Back to natural semakin meluas dan menjadi alternatif dalam penyelesaian berbagai masalah besar yang dihadapi masyarakat global saat ini. Terutama dalam pemenuhan bahan sandang, pangan serta bahan obat-obatan yang semakin meningkat tajam. Meski muncul sebagai alternatif baru, kiranya selogan tersebut dimaknai sebagai kebersesamaan dengan alam, tidak menjadikan alam semata-mata sebagai objek yang terus dieksploitasi tanpa terkendali.“Beri yang terbaik untuk alam, karenanya kita akan mendapatkan terbaik pula darinya.” Selama ini, sumber devisa pembangunan nasional bertumpu pada bahan alam berupa hasil-hasil tambang. Eksploitasi komponen kimia alam tak-terbaharukan yang terjadi selama ini semakin memperihatinkan, sumberdaya alam berupa material tambang batu bara, emas, nikel, gas dan minyak bumi semakin menipis, situasi ini kian menyeret kita pada kebangkrutan. Karenanya diperlukan reorientasi pengelolaan dan pemanfaatan sumberdaya alam yang lebih bijak dan berkelanjutan. Sebagai negara yang memiliki sumberdaya alam hayati melimpah bangsa Indonesia seharusnya memprioritaskan pengembangan IPTEKS yang berorientasi pada sumber daya alam hayati.Disampaikan dalam Seminar Nasional Kimia, Himpunan Kimia Indonesia Cab. Kalimantan Timur, Samarinda 9 November 2013
EFEK SUHU DAN LAMA PEMANASAN TERHADAP SIFAT FISIKA-KIMIA BUBUK PEWARNA DARI KELOPAK BUNGA ROSELA (Hibiscuss sabdariffa L.) YANG DIHASILKAN Yuliani -
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
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Roselle (Hibiscus sabdariffa L.) calyces can be used as natural food colorant. The objective of this study is to observe the effect of drying time and temperature on physical and chemical characteristic of rosela calyces powder. The experiment is arranged in Completely Randomized Design and each treatment is replicated by three times. The factors are drying temperature (60, 70, 80 C) and drying time (5, 7, 9 h). The results showed that the combined treatment of drying temperature at 80 C and drying time for 5 h gave the best result, i.e yield of 9.46 %, water absorption of 1.92 g/g sampel, color intensity of 1 % rosella calyces powder solution showed an absorbance of 0.28 at 605 nm, water content 6.42 %, ash content 0.51 %, and total acid of 5.14 % as malic acid.

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