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INDONESIA
PROSIDING SEMINAR KIMIA
Published by Universitas Mulawarman
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
Arjuna Subject : -
Articles 502 Documents
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POTENSI ANTIJAMUR EKSTRAK METANOL AKAR MANGROVE Rhizopora apiculata TERHADAP JAMUR Candida albicans Usman Sain; Rizal Hariyadi
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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Abstract

Mangroves generations used by the community as a medicinal ingredient. One of a breed of mangrove from plants is mangrove rhizophora apiculata. Mangrove rhizopora apiculata is a plant contained on the edge of the beach. The study is done to know compound of a metabolite secondary there are in plants mangrove rhizopora apiculata and the potential mangrove rhizopora apiculata to inhibition of the growth of fungi. Mangrove rhizopora apiculata ordinary be used as processed food .The kind of research this is research experiment. To test compound of a metabolite secondary used test qualitative. While , to inhibition of the growth of fungi used method of scratch using fungi candida albicans and aspergillus niger. Based on this research note Rhizophora apiculata mangrove leaves with methanol extract containing flavonoids, steroids, tannin, saponin. Methanol extract of roots of mangrove Rhizophora apiculata in a concentration of 1250 ppm, 2000 ppm, 5000 ppm and 10000 ppm have not been able to inhibit the growth of the fungus Candida albicans. Keywords: Root Mangrove Rhizophora apiculata, Secondary Metabolites Compounds, antifungals.
PEMBUATAN DAN PEMANFAATAN SILIKA DARI PASIR PANTAI SEBAGAI BAHAN PEMUCAT UNTUK MENURUNKAN KADAR ASAM LEMAK BEBAS PADA CPO (CRUDE PALM OIL) Nirwana Nirwana; Alimuddin Alimuddin; Erwin Erwin
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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Abstract

A study on the manufacture and utilization of silica from coastal sand as a pale ingredient to lower free fatty acid levels has been conducted. The present invention includes sample preparation, sodium silicate (Na2SiO3), silica gel formation, silica gelation and Crude Palm Oil (CPO) test result of bleaching. The results showed that the silica of coastal sand was potential as a crude palm oil (CPO) ingredient with the ability to decrease the free fatty acid and color brightness, on the addition of 1 gram of silica obtained result of free fatty acid content analysis is 24,35 % with decreased color brightness of 0,27% and on the addition of 2 gram of silica obtained result of free fatty acid content analysis is 42,49 % with decreased color brightness of 2,8%. Keywords: Sand Beach Sebatik Island, Silica, Bleaching, Crude Palm Oil (CPO), Free Fatty Acid Levels.
PERBANDINGAN METODE DESTRUKSI BASAH DAN DESTRUKSI KERING TERHADAP ANALISIS LOGAM BERAT TIMBAL (Pb) PADA TANAMAN RUMPUT BEBEK (Lemna minor) Rusnawati Rusnawati; Bohari Yusuf; Alimuddin Alimuddin
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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Abstract

Research on analysis of Pb in duckweed plants (Lemna minor) has been conducted by comparing of wet and dry destruction method. The duckweed plants would be destructed in wet destruction and dry destruction used nitric acid and aquaregia by variation of time and temperature in wet destruction. The results of destruction were tested with an atomic absorption spectrophotometer. To see the comparative accuracy of this method is using recovery test (% R) to determine Pb by wet destruction gave the better result which it showed that with obtained of %R with the nitric acid in temperature 350°C and 1 hour of time were 99.09 % and aquaregia were 84.05 %. The values of %R in dry destruction by nitric acid and aquaregia were 79.96% and 75.31%. According to this research it can conclude that using the wet destruction is better than dry destruction. Keywords : Wet destruction, Dry destruction, Lemna minor, Recovery test, Atomoc Absorption Spectrophotometer.
ISOLASI DAN PENENTUAN KONDISI KERJA OPTIMUM LIPASE DARI PERKECAMBAHAN BIJI DURIAN (Durio zibethinus L) Dzulkarnain Dzulkarnain; Winni Astuti; Saibun Sitorus
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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This research was conducted to isolate and to know the optimum lipase working conditions (pH, temperature and concentration of substrate), and to know lipase activity from germination of durian seed (Durio zibethinus L.). Isolation is done by 2 stages namely, homogenization and centrifugation. Centrifugation is done at a speed of 12000 rpm with a temperature of 4°C for 30 minutes. Activity by using titration method and protein concentration using method. The optimum lipase temperature obtained was 60°C, optimum pH was 7, and the optimum substrat concentration was 1 % v/v. The lipase specific activity yielded 0,221 U/mg. Keywords: lipase, Durio zibethinus L., Lipase specific activity.
PEMBUATAN ETANOL DARI UMBI GARUT (Maranta arundinacea) SECARA HIDROLISIS ENZIMATIS DENGAN PENAMBAHAN NPK SEBAGAI NUTRISI FERMENTASI MENGGUNAKAN Saccharomyces cerevisiae Wulan Verani; Rudi Kartika; Winni Astuti
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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Abstract

Ethanol production as a biofuels successor fossil fuels from arrowroot tubers (Maranta arundinacea) through enzymatic hydrolysis process and fermentation use Saccharomyces cerevisiae has been carried out. This research aimed to determine levels of ethanol production by various concentration of nutrients added and variations time of fermentation. Hydrolysis process by enzymatic through a liquefaction phase with α-amylase and gluco-amylase at the saccharification stage. In the fermentation process NPK is used as a fermentation nutrient. The variations of NPK used is 1%, 2% and 3% (w/v) and the variations of fermentation time is 5, 7 and 9 days. The highest ethanol concentration of ethanol obtained are in addition of NPK nutrition at 2% (w/v) for 7 days, with the obtained ethanol concentration of 46, 989%. Keywords: ethanol, arrowroot tubers (Maranta arundinacea), NPK, fermentation.
PEMANFAATAN TEMPURUNG BIJI KARET (Havea Brasiliensis) SEBAGAI BAHAN ALTERNATIF DALAM PENGOLAHAN LIMBAH TEKSTIL Nur Linda Anggraini; Saibun Sitorus; Rahmat Gunawan
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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Abstract

The utilization of rubber seed shell (Havea Brasiliensis) can be used as an alternative material in the processing of textile waste. The next step to determine the efficiency of a material rubber seed shell performed experiments of material in process with the addition of material rubber seed shell by variations of concentrations 2 grams, 3 grams, 4 grams and 5 grams per 200 mL sample for each parameters. Then stirred at 100 rpm for 15 minutes and then deposited for 24 hours. Based on the final results obtained for TSS (Total Suspended Solid) parameter removal efficiency is 97,40%. for the Cr metal ion parameter is 62,39% and for Cu metal ion is 68,65%. For efficiency of dyes parameter is 70,72% with optimum concentration of material is 5 grams for each parameters. Keywords: Rubber seed shell, TSS, metal ion, dye.
MODIFIKASI KARET ALAM SIKLIS DAN MALEAT ANHIDRAT DENGAN ADANYA PENAMBAHAN BENTONIT - CETIL TRIMETIL AMONIUM BROMIDA (CTAB) MENGGUNAKAN INISIATOR BENZOIL PEROKSIDA Ahmad Hafizullah Ritonga; Barita Aritonang; Hendri Faisal
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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Abstract

Research on the modification of Cyclic Natural Rubber (CNR) and Maleat Anhydrate (MA) with addition of Bentonite - Cetyl Trimethyl Ammonium Bromide (CTAB) using Initiator of Benzoyl Peroxide (BPO) has been done, which aims to find out the appropriate method of modifying CNR and MA using BPO initiators to form CNR-g-MA, and mixed together with Bentonite-CTAB produces a CNR-g-MA/Bentonite-CTAB composite, which results are reviewed by FTIR spectroscopy and SEM analysis. This modification was carried out by dissolving 7 g of CNR with 20 mL of xylene at 45-55 ° C, then mixing the CNR solution with 3 g MA, followed by the addition of 5 phr BPO initiator and addition of 3 phr Bentonite-CTAB while stirring for + 1 hour at the same temperature. The results obtained were analyzed by FTIR spectroscopy showing sharp and strong absorption peaks at wave numbers 1437.80 cm-1, 1311.24 cm-1 and 849.73 cm-1 and the absence of the -OH group on the wavelength number 3598.51 cm-1 and 3411.92 cm-1 indicating Bentonite-CTAB has been mixed in CNR-g-MA. The morphological results with SEM show that Bentonite-CTAB is mixed in CNR-g-MA homogeneously. Keywords: Cyclic Natural Rubber, Maleat Anhydrates, Benzoyl Peroxide, Bentonite, Cetyl TrimethylAmmonium Bromide.
UJI TOKSISITAS DENGAN METODE BSLT EKSTRAK KASAR KULIT BATANG TAMPOI (Baccaurea macrocarpa) Diasttri Wahyu Rahmah Day; Erwin Erwin; Winni Astuti
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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Abstract

Baccaurea macrocarpa (Tampoi) merupakan genus Baccaurea termasuk tumbuhan yang berbuah. Secara tradisioanal daun dan kulit batangnya dipergunakan sebagai bahan obat. Penelitian ini bertujuan untuk mengetahui tingkat toksisitas dari ekstrak kulit batang Tampoi. Metode yang digunakan meliputi ekstraksi dan partisi, uji fitokimia, Brine Shrimp Lethality Test (BSLT) ekstrak dan fraksi-fraksinya. Hasil uji fitokimia terhadap ekstrak kasar alkaloid, triterpen, fenol and flavonoid. Hasil uji toksisitas ekstrak kasar termasuk katagori tidak beracun dengan nilai LC50 19364,71 ppm. Keywords : Baccaurea macrocarpa, tradisional, Toksisitas, BSLT.
ISOLASI DAN PENENTUAN KONDISI KERJA OPTIMUM AMILASE DARI REBUNG BAMBU SERIT (Gigantochloa robusta Kurz.) Fajarwati Siska; Winni Astuti
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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Abstract

Amilase merupakan enzim yang dapat menghidrolisis pati. Amilase dapat berasal dari tanaman, mikroorganisme dan manusia. Rebung merupakan salah satu sumber amilase yang dipilih karena mengandung glukosa. Penelitian ini dilakukan untuk mengisolasi, mengetahui kadar protein, mengetahui kondisi kerja optimum (pH, suhu dan konsentrasi substrat), serta aktivitas spesifik amilase yang berasal dari rebung bambu serit (Gigantochloa robusta Kurz.). Penentuan konsentrasi protein dilakukan dengan menggunakan metode Bradford. Penentuan kondisi kerja optimum dan aktivitas spesifik dilakukan dengan menggunakan metode asam dinitrosalisilat (DNS). Hasil penelitian ini menunjukkan bahwa kadar protein yang terkadung dalam ekstrak kasar enzim dari rebung bambu serit adalah 2,83 mg/mL. Kondisi kerja optimum amilase dari rebung bambu serit adalah derajat keasaman (pH) 6, suhu 45ºC dan konsentrasi substrat 6,5 mg/mL. Aktivitas spesifik amilase yang dihasilkan dari rebung bambu serit adalah 236,339 U/mg. Kata kunci: amilase, rebung bambu, asam dinitrosalisilat (DNS) dan aktivitas spesifik.
PEMBUATAN SILIKA MESOPORI DARI BIOMASSA Joni Rahman; Noor Hindryawati; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
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Abstract

Pembuatan silika mesopori dari bahan dasar silika dari limbah biomassa telah semakin berkembang. Silika mesopori disintesis dari natrium silika yang diekstrak dari bahan biomassa (abu sekam padi, tandang kosong sawit, daun bambu petung). Sintesis silika mesopori dilakukan pada pH 11 dilanjutkan dengan penambahan template secara hydrothemal ataupun refluk. Tahap selanjutnya surfaktan dapat dihilangkan dengan kalsinasi ataupun ekstraksi pelarut. Hasil sintesis silika mesopori ditandai dengan munculnya 3 puncak [100], [110] dan [200] pada rentang 0o – 2o menunjukkan ciri SBA-15 dan muncul 4 puncak [100], [110] dan [200] yang menunjukkan ciri silika MCM-41. Hasil adsorpsi desorpsi nitrogen isoterm silika memperlihatkan adsorpsi Tipe IV yang merupakan karakteristik material SBA-15 dan adsorpsi tipe V yang merupakan karakteristik dari silika MCM-41. Selain itu diperoleh ukuran luas permukaan 698 m2/g, volume pori 0,81 cm3/g dan diameter pori 4,66 nm pada SBA-15 dan ukuran luas permukaan 279,06 m2/g, volume pori 0,46 cm3/g dan diameter pori 3,42 nm pada silika MCM-41. Kata Kunci : Biomassa, MCM-41, Mesopori, SBA-15, Silika.

Page 15 of 51 | Total Record : 502

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