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Pengembangan Metode Penentuan Isoflavon Kadar Rendah dalam Limbah Cair Tahu Menggunakan Enzim NADH Oksidase Sarjono, Purbowatiningrum Ria; Danuri, Hasim; Iswantini, Dyah
Jurnal Kimia Sains dan Aplikasi Vol 7, No 1 (2004): Volume 7 Issue 1 Year 2004
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.348 KB) | DOI: 10.14710/jksa.7.1.17-21

Abstract

Penentuan isoflavon asal limbah tahu telah dilakukan.Ekstrak kasar isoflavon asal limbah tahu diperoleh dengan cara menghidrolisis menggunakan HCl 4 N diperoleh rendemen sebanyak 4,81 g/l. Kadar isoflavon diukur menggunakan metode Graham (1999) yang sebelumnya dilakukan optimasi enzim NADH oksidase diperoleh panjang gelombang optimum pada 327 nm pada suhu 350C, pH 5, konsentrasi substrat optimum 100 μM, konsentrasi enzim optimum 0,3 U/ml. Kadar isoflavon dalam limbah tahu 0,123x103 ppm sedangkan kadar isoflavon kedelai sebesar 0,5921x103 ppm. Sehingga kadar isoflavon limbah tahu adalah sebesar 20% dibanding kadar isoflavon kedelai.
FORMULASI LARVASIDA NABATI BERBASIS MINYAK BIJI KAMANDRAH (Croton tiglium L.) TERSTANDAR SEBAGAI PENCEGAH PENYAKIT DEMAM BERDARAH DENGUE Winoto, Evul; Iswantini, Dyah; Batubara, Irmanida; Hadi, Upik Kesumawati
Buletin Penelitian Tanaman Rempah dan Obat Vol 24, No 2 (2013): Balai Penelitian Tanaman Rempah dan Obat
Publisher : Balittro

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Abstract

ABSTRAKKamandrah (Croton tiglium L.) merupakan tanaman obat yang banyak terdapat di Kalimantan. Biji kamandrah banyak dimanfaatkan sebagai obat pencahar, racun ikan, dan pembunuh jentik nyamuk. Penelitian ini bertujuan mendapatkan formula minyak biji kamandrah untuk larvasida nabati yang efektif, aman dan mendapatkan minyak kamandrah terstandar sebagai bahan baku larvasida nabati. Analisis fisiko kimia minyak biji kamandrah hasil budidaya di Sukabumi memberikan hasil kadar air 0,33%, keasaman 0,09%, viskositas 4,1 cP, berat jenis 0,9425 g ml-1, indeks bias 1,4788 serta kadar asam lemak bebas 1,65%. Hasil uji ini lebih baik dibanding dengan tanpa budidaya dari Kalimantan dan Sukabumi. Uji menggunakan spektrofotometri menunjukkan kandungan piperine minyak biji kamandrah hasil budidaya Sukabumi sebesar 0,046%; tanpa budidaya dari Sukabumi dan Kalimantan masing-masing 0,043% dan 0,037%. Kandungan piperine berpengaruh terhadap hasil uji efikasi larva nyamuk Aedes aegypti instar III, nilai LC50 pengamatan 24 jam minyak kamandrah hasil budidaya Sukabumi sebesar 114,4 ppm, minyak kamandrah tanpa budidaya dari Sukabumi dan Kalimantan masing-masing 125,2 dan 212,9 ppm. Formulasi larvasida metode granulasi basah terhadap minyak biji kamandrah hasil budidaya Sukabumi menunjukkan, kandungan minyak kamandrah 15% dengan emulsifier gom arab memberikan hasil paling efektif dengan nilai LC50 24 jam sebesar 210,01 ppm. Uji stabilitas formula larvasida nabati minyak biji kamandrah yang disimpan pada temperatur 30, 40 dan 50oC selama 28 hari menunjukkan tidak ada perubahan fisik pada granul. Selama penyimpanan terjadi peningkatan kandungan piperine dalam formula larvasida antara 0,6-234%. Uji durabilitas formula larvasida terhadap larva A. aegypti menunjukkan penurunan potensi larvasida sampai di bawah 50% pada hari ke 12 setelah aplikasi.Kata kunci: Croton tiglium, larvasida nabati, standarisasi, formulasi
FORMULASI LARVASIDA NABATI BERBASIS MINYAK BIJI KAMANDRAH (Croton tiglium L.) TERSTANDAR SEBAGAI PENCEGAH PENYAKIT DEMAM BERDARAH DENGUE Winoto, Evul; Iswantini, Dyah; Batubara, Irmanida; Hadi, Upik Kesumawati
Buletin Penelitian Tanaman Rempah dan Obat Vol 24, No 2 (2013): Balai Penelitian Tanaman Rempah dan Obat
Publisher : Balittro

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

Abstract

ABSTRAKKamandrah (Croton tiglium L.) merupakan tanaman obat yang banyak terdapat di Kalimantan. Biji kamandrah banyak dimanfaatkan sebagai obat pencahar, racun ikan, dan pembunuh jentik nyamuk. Penelitian ini bertujuan mendapatkan formula minyak biji kamandrah untuk larvasida nabati yang efektif, aman dan mendapatkan minyak kamandrah terstandar sebagai bahan baku larvasida nabati. Analisis fisiko kimia minyak biji kamandrah hasil budidaya di Sukabumi memberikan hasil kadar air 0,33%, keasaman 0,09%, viskositas 4,1 cP, berat jenis 0,9425 g ml-1, indeks bias 1,4788 serta kadar asam lemak bebas 1,65%. Hasil uji ini lebih baik dibanding dengan tanpa budidaya dari Kalimantan dan Sukabumi. Uji menggunakan spektrofotometri menunjukkan kandungan piperine minyak biji kamandrah hasil budidaya Sukabumi sebesar 0,046%; tanpa budidaya dari Sukabumi dan Kalimantan masing-masing 0,043% dan 0,037%. Kandungan piperine berpengaruh terhadap hasil uji efikasi larva nyamuk Aedes aegypti instar III, nilai LC50 pengamatan 24 jam minyak kamandrah hasil budidaya Sukabumi sebesar 114,4 ppm, minyak kamandrah tanpa budidaya dari Sukabumi dan Kalimantan masing-masing 125,2 dan 212,9 ppm. Formulasi larvasida metode granulasi basah terhadap minyak biji kamandrah hasil budidaya Sukabumi menunjukkan, kandungan minyak kamandrah 15% dengan emulsifier gom arab memberikan hasil paling efektif dengan nilai LC50 24 jam sebesar 210,01 ppm. Uji stabilitas formula larvasida nabati minyak biji kamandrah yang disimpan pada temperatur 30, 40 dan 50oC selama 28 hari menunjukkan tidak ada perubahan fisik pada granul. Selama penyimpanan terjadi peningkatan kandungan piperine dalam formula larvasida antara 0,6-234%. Uji durabilitas formula larvasida terhadap larva A. aegypti menunjukkan penurunan potensi larvasida sampai di bawah 50% pada hari ke 12 setelah aplikasi.Kata kunci: Croton tiglium, larvasida nabati, standarisasi, formulasi
Activity and Stability of the Alcohol Biosensor Using Acetobacter aceti Biofilm on Screen-Printed Carbon Electrode Dyah Iswantini; Fitriani Indahsari; Akhiruddin Maddu; Novik Nurhidayat; Henny Purwaningsih; Sri Sugiarti
HAYATI Journal of Biosciences Vol. 27 No. 1 (2020): January 2020
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (865.056 KB) | DOI: 10.4308/hjb.27.1.24

Abstract

Most of the alcohol analytical methods are robust and instrumentally expensive. An alternative of ethanol biosensor based on selected biofilm forming Acetobacter aceti bacteria producing alcohol oxidase was constructed on a screen-printed carbon electrode. The enzyme specifically oxidizes the ethanol and generate electrical current that then electrochemically detected and measured by cyclic voltammetry method. A scanning electron microscopic analysis indicated that the biofilm was formed firmly in the electrode. This constructed biosensor reached its optimum at biofilm formed by bacteria of 1.33 × 1010 cells/ml, temperature of 27°C, and pH 7. The enzyme kinetic had KM and Vmax AOX values of 3.5 mm and 125 μA respectively. The biosensor had detection and quantization limit of 0.003 and 0.009%, respectively, and a sensitivity of 57.29 μA (%)-1. A linearity and relative deviation value were revealed at 0.993 and 1.95% respectively. The biosensor was relatively specific and had no interferences with methanol, sodium chloride and citric acid as the common interferences of ethanol compounds. Furthermore, the biosensor had been stably for at least 55 days. Therefore, this constructed biosensor should be developed into a prototype for a practical effective analysis.
Characterization of Ethanolic Extract of Streptomyces sp. as a Pancreatic Lipase Inhibitors Produced by Endophytic Streptomyces sp. AEBg12 Fitri, Lenni; Meryandini, Anja; Iswantini, Dyah; Lestari, Yulin
Biosaintifika: Journal of Biology & Biology Education Vol 9, No 2 (2017): August 2017
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v9i2.8907

Abstract

Endophytic Streptomyces sp. AEBg12 isolated from Zingiber cassumunar (Bangle) is known to produce pancreatic lipase inhibitory compound. However, the characteristics of this active compound has not been reported yet. This study aimed to determine the characteristics of pancreatics inhibitory compound produced by Streptomyces sp. AEBg12 and to assess the role of endophytic actinobacteria in producing pancreatic lipase inhibitor using endophytic-free bangle tissue culture, wild bangle and compared with the activity of Streptomyces sp. AEBg12 endophytes. Supernatant of Streptomyces sp. AEBg12 was extracted using ethanol, ethyl acetate, and n-hexane solvents. Toxicity test was performed using larvae of shrimp Artemia salina. The results showed that the best solvent to obtain pancreatic lipase inhibitor compounds was ethanol. Phytochemical analysis showed that ethanolic extract of endophytic Streptomyces sp. AEBg12 contained flavonoids. IC50 value of ethanol extract was 180.83 g/ml. The result of TLC showed that ethanolic extract of Streptomyces AEBg12 had a blue luminescence band indicated that there were either flavone, flavanones, flavonols or isoflavones. Inhibitory activity of Streptomyces sp. AEBg12 was higher than wild bangle and bangle tissue culture. The information from this study can be be used as a basic data for further characterization of the active compound, which might be developed as an antiobesity agent through its pancreatic lipase inhibitory activity.
UJI IN VITRO EKSTRAK AIR DAN ETANOL DARI BUAH ASAM GELUGUR, RIMPANG LENGKUAS, DAN KENCUR SEBAGAI INHIBITOR AKTIVITAS LIPASE PANKREAS Iswantini, Dyah; Darusman, Latifah K.; Fitriyani, Ana
Jurnal Sains dan Teknologi Indonesia Vol. 12 No. 1 (2010)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (70.299 KB) | DOI: 10.29122/jsti.v12i1.845

Abstract

Asam gelugur fruits of Garcinia often used to reduce body weight. Lengkuas and kencur are traditional herbal that potential for antiobesity because they could reduce the level of phospholipids, triglycerides, and cholesterol. The aim of the research was to evaluate the potencies of these herbal as antiobesity by measurement of their water and ethanol extracts capabilities as in vitro inhibitor of pancreatic lipase activity. The water and ethanol extracts of asam gelugur fruits contained saponins and alkaliods, respectively. The water extract of lengkuas rhizomes contained alkaloids, flavonoids, saponins, and quinones, while the ethanol extract contained alkaloids, flavonoids, saponins, and steroids. The water extract of kencur rhizomes contained saponins and quinones, while the ethanolextract contained alkaloids, flavonoids, steroids, and quinones. The highest inhibitory effect of all extracts was obtained from the ethanol extract of asam gelugur fruits with value of 86.3% at 150 ppm. The highest inhibitory effect of lengkuas extracts was from the ethanol extract at 200 ppm (56.2%). The highestinhibitory effect of kencur was showed by the ethanol extract with the value 37.6% at 300 ppm. These values were higher than the inhibitory effect of the positive control (Xenical®) at 100 ppm (10.6%).
PENGARUH ZAT PENGATUR TUMBUH TERHADAP PERKECAMBAHAN BENIH DAN PERTUMBUHAN BIBIT KAMANDRAH (CROTON TIGLIUM L.) Tjokrowardojo, Agus Sudiman; Rosman, Rosihan; Iswantini, Dyah
JURNAL AGROTROPIKA Vol 14, No 2 (2009): Agrotropika Vol.14 No.2 2009
Publisher : JURNAL AGROTROPIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (324.831 KB)

Abstract

Study of growth regulator of kamandrah (Croton tiglium L.) by pot experiment was conducted in green house at Indonesian of Medicinal and Aromatic Crops Research Institute (IMACRI) Bogor. The experiment was conducted from Juni to Oktober 2008. In pot experiment to test the germination by treatments: a) Nitroaromatic at 0.5 ppm concentration, b) Nitroaromatic at 1.0 ppm concentration, c) Auxin + Cytokinine at 2.5 ppm concentration, d) Auxin + Cytokinine at 2.75 ppm concentration, e) Root Up at 0.5 ppm concentration, f) Root Up at 0.75 ppm concentration and g) control (without treatment). The assasment on 30 days after sowing (DAS), showed that treatments by Nitroaromatic at 0.5 dan 1.0 ppm, Auksin+ Citokinine at 2.5 dan 2.75 ppm were improved seed germination of kamandrah from 26.67% (by control) to 40.00 - 46.67 %. Nitroaromatic, Auxin + Cytokinine and IBA + NAA to improve seeds germination of kamandrah about 24 ? 74 % than control in 30 DAS. Seedlings growth of kamandrah by Nitroaromatic at 0.5 and 1.0 ppm, Auxine + Cytokinine at 2.5 and 2.75 ppm, IBA + NAA at 0.5 and 1.0 ppm were 11.15 ? 16.40 cm more higher than control (8.85cm). The number of branch treatments by Auxin + Cytokinine at 0.5 ppm (21.35/crop), Nitroaromatic at 0.5 and 1.0 ppm (19.35 and 17.15/crop), IBA + NAA at 0.5 ppm (17.15/crop) and Auxine at 2.75 ppm (16.75/crop) more than control significantly (14.45/crop). The assasment on 60 DAS showed that seedlings growth of kamandrah improved by plant growth regulators ie. Nitroaromatic, Auxin + Cytokinine and IBA + NAA.Key words: Plant growth regulator, seed germination, seedling, kamandrah (Croton tiglium L.).
Inhibition Kinetics of Sida rhombifolia L. Extract Toward Xanthine Oxidase by Electrochemical Method Dyah Iswantini; Muammar Yulian; Sri Mulijani; Trivadila Trivadila
Indonesian Journal of Chemistry Vol 14, No 1 (2014)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (226.064 KB) | DOI: 10.22146/ijc.21270

Abstract

Sida rhombifolia L. is a traditional medicinal plant that has been known with potential as antigout. The previous research suggested that flavonoids crude extract of S. rhombifolia had an inhibitory activity toward xanthine oxidase by 71% and a spectrophotometric measurement showed that the type of flavonoids crude extract inhibition was a competitive inhibition. The purpose of the research was to investigate the type of inhibition kinetic of S. Rhombifolia’s ethanol extract by electrochemical method and to compare the measurements of linearity and sensitivity between spectrophotometric and electrochemical methods. The results showed that the yield of S. Rhombifolia’s ethanol extract was 9.82% with the inhibitory activity ranging from 13.64% to 82.69% (5.00-200 mg L-1) and IC50 value was 91.15±5.74 mg L-1. Allopurinol as a control showed the inhibitory activity of 15.26-70.95% (0.10-4.00 mg L-1) and IC50 value was 2.45±2.21 mg L-1. Inhibition kinetics of the ethanol extract caused a KM increase and unchange of VMAX. Based on the data, the type of inhibition kinetics was a competitive inhibition, with an inhibitor affinity (α) value of 3.18. Linearity of xanthine oxidase activity assay by electrochemical and spectrophotometric methods showed the range of 0.01-1.00 mM (R2 = 0.978) and 0.05-0.70 mM (R2 = 0.977) respectively. The sensitivity of electrochemical method was reported higher (0.95 μA mM-1) than the spectrophotometric method (0.007 min-1).
Zingiber cassumunar Roxb. (Bangle), Guazuma ulmifolia Lamk. (Jati belanda), and Murraya paniculata (Kemuning) have been used as slimming agents in jamu. A few researches have performed studies on their potency as antiobesity. The aim of this research was to investigate the potency of Z. cassumunar rhizome, G. ulmifolia, and M. paniculata leaf extracts as antiobesity agent based on in vitro inhibition activity of the extracts on pancreatic lipase activity. In this research, water content determin DYAH ISWANTINI; RHOITO FROISTA SILITONGA; ELIZABETH MARTATILOFA; LATIFAH KOSIM DARUSMAN
HAYATI Journal of Biosciences Vol. 18 No. 1 (2011): March 2011
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.18.1.6

Abstract

Zingiber cassumunar Roxb. (Bangle), Guazuma ulmifolia Lamk. (Jati belanda), and Murraya paniculata (Kemuning) have been used as slimming agents in jamu. A few researches have performed studies on their potency as antiobesity. The aim of this research was to investigate the potency of Z. cassumunar rhizome, G. ulmifolia, and M. paniculata leaf extracts as antiobesity agent based on in vitro inhibition activity of the extracts on pancreatic lipase activity. In this research, water content determination, phytochemical assay, toxicity assay and in vitro assay of inhibition activity on pancreatic lipase were performed toward single and mixture extracts of Z. cassumunar, G. ulmifolia, and M. paniculata resulted by water, ethanol, and saponin extractions. The results indicated that 100 ppm of ethanol extraction of Z. cassumunar had highest inhibition effect on the activity of pancreatic lipase (29.17%), followed by 100 ppm of water extraction of M. paniculata  (25.66%), 60 ppm of ethanol extraction of G. ulmifolia leaves (25.13%) and ethanol extraction mixture of Z. cassumunar, G. ulmifolia, and M. paniculata  leaves with ratio of 25:25:25 (21.58%). These inhibition effects were higher than inhibitory effect of 100 ppm of Xenical®/orlistat as the positive control, with the inhibition value of 17.53%. Saponin crude extracts had lower inhibitory effect than the other extractions. It was suggested that ethanol extraction of Z. cassumunar, and G. ulmifolia and water extraction of M. paniculata had potency as antiobesity agent
IN VITRO INHIBITION OF CELERY (Apium graveolens L.) EXTRACT ON THE ACTIVITY OF XANTHINE OXIDASE AND DETERMINATION OF ITS ACTIVE COMPOUND Dyah Iswantini; Tuti Hayati Ramdhani; Latifah K Darusman
Indonesian Journal of Chemistry Vol 12, No 3 (2012)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (315.358 KB) | DOI: 10.22146/ijc.21338

Abstract

The objective of this study was to determine the inhibition effect of celery extracts toward xanthine oxidase by in vitro method, and its active compounds. Roots and herb of celery were extracted using water and ethanol solvents. Results indicated that the herbal ethanol extract had the highest inhibition effect (91.40%) at 1400 ppm. The components contained in the herbal ethanol extract were then separated by column chromatography using the best eluent (chloroform : ethyl acetate at 7:3). All of the fractions had inhibition effect greater than 50%. The fraction number 4 was the one with the highest inhibition effect followed by fraction 5 with inhibition percentage of both fractions at 200 ppm were 88.62 and 85.44%, respectively. The analysis of the ultraviolet spectrum of fraction 4 showed the presence of π-π* transition which was resulted by the aromatic C=C, -OH, and C-O chromophores, and also showing the n-σ* transition which was given by -C=O chromophore. The infrared spectrum analysis indicated the presence of aromatic -C=C, -OH, and C=O functional groups. Based on the phytochemical assay and both instrumental spectrums, it was thought that the active compounds of fraction 4 and 5 were in the flavonoid group.