Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

1.503

P-Index

This Author published in this journals

All Journal Agrointek agriTECH Proceeding of International Congress Logista: Jurnal Ilmiah Pengabdian Kepada Masyarakat Jurnal Teknologi Hasil Pertanian Journal of Food Technology and Agroindustry Jurnal Pengabdian UNDIKMA Jurnal Mesin Nusantara

Dian I Y Ribka Stefanie Wongso, Paini Sri Widyawati, Tarsisius D B Fenny A K, Evelyn L W, Dian I Y

Program Studi Teknologi Pangan, Fakultas Teknologi Pertanian, Universitas Katolik Widya Mandala Surabaya, Jl. Dinoyo 42-44 Surabaya, 60265

Author-ID : 533047

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Public Health Social Sciences Transportation Other

Published : 12 Documents Claim Missing Document

Claim Missing Document

Articles

Title

Pengaruh Perbedaan Warna Pigmen Beras Organik terhadap Aktivitas Antioksidan Paini Sri Widyawati; Anita Maya Suteja; Thomas Indarto Putut Suseno; Pricilia Monica; William Saputrajaya; Christian Liguori
agriTECH Vol 34, No 4 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Organic Rices, such as Jasmine variety white organic rice, Saodah variety red organic rice, and Java variety black organic rice, are many cultivated by farmer in Indonesia, especially Sleman area, DI Yogyakarta. The potency of three varieties of organic rice as antioxidant source hasn’t been studied. Therefore this research was done to know the effect of pigment color difference in three varieties of organic rice on antioxidant activity, especially 1,1-diphenyl-2- pycrylhydrazyl (DPPH) radical scavenging activity and ion reducing power. The results showed that Saodah variety red organic rice had the highest antioxidant potency because it had the highest total phenol and total flavonoid, 37.93 mg GAE/g sample dry base and 0.85 mg CE/g sample dry base, respectively. However Saodah variety red organic rice had total anthocyanin lower than that of Java variety black organic rice, 0.0025 mg/g sample dry base and 0.024 mg/g sample dry base, respectively. Anthocyanin compounds identified in three varieties of organic rice were cyanidine-3-glucoside at 32 minute time retention and peonidine -3-glucoside at 37 minute time retention. 1,1-diphenyl-2-pycrylhydrazyl (DPPH) radical scavenging activity and ion reducing power of Saodah variety red organic rice were the highest, 0.90 mg equivalent vitamin E/g sample dry base and 278.28 mg equivalent vitamin E/g sample dry base, respectively. ABSTRAKBeras organik, meliputi beras putih varietas Jasmine, merah varietas Saodah, dan hitam varietas Jawa, banyak dibudidayakan oleh masyarakat di Indonesia, terutama daerah Sleman, D.I. Yogyakarta. Potensi ketiga jenis beras tersebut sebagai sumber antioksidan belum banyak dikaji. Oleh karena itu penelitian ini dilakukan untuk mengetahui pengaruh perbedaan pigmen pada ketiga jenis beras organik tersebut terhadap aktivitas antioksidan, khususnya kemampuan menangkap radikal bebas 2,2-difenil-1-pikrilhidrasil (DPPH) dan mereduksi ion besi. Hasil menunjukkan bahwa beras organik merah varietas Saodah paling berpotensi sebagai sumber antioksidan. Hal ini ditunjukkan dengan total fenol dan total flavonoid beras merah tertinggi dibandingkan kedua beras yang lain, masing-masing sebesar 37,93 mg GAE/g sampel db dan 0,85 mg CE/g sampel db. Meskipun beras organik merah mempunyai total antosianin (0,0025 mg/g sampel db) lebih rendah dari beras organik hitam (0,024 mg/g sampel db). Jenis senyawa antosianin yang terdeteksi pada ketiga jenis organik ini adalah sianidin-3-glukosida yang terdeteksi pada waktu retensi 32 menit dan peonidin-3-glukosida dengan waktu retensi 37 menit. Kemampuan menangkap radikal bebas DPPH dan kemampuan mereduksi ion besi beras organik merah tertinggi, masing-masing sebesar 0,90 mg ekuivalen vit E/g sampel db dan278,28 mg ekuivalen vit E/g sampel db.

Potensi Daun Kemangi (Ocimum basilicum Linn) sebagai Penangkal Radikal Bebas DPPH (2,2-Diphenyl-l-pycrylhidrazil radical) Paini Sri Widyawati
agriTECH Vol 25, No 3 (2005)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The commercial development of plants as sources of natural antioxidant to enhance health and food preservation is of current interest. It is related to phenolic compounds containing in foods and beverages to prevent many diseases. The natural antioxidant is more safety than the synthetic antioxidant such as TBHQ (tether butylated hydroxyquinone), BHT (butylated hydroxytoluene) and BHA (butylated hydroxyanisole). Basil (Ocimum basilicum Linn) contains a wide range of essential oils and is rich in phenolic compounds. These can be extracted by two methods i.e. soxhlet and hydrodistilation. The ethanolic extracts are resulted by soxhlet and essential oils are extracted by hydrodistilation. The oils are analyzed by gas chromatography to know the phenolic compound contents. The spectra are identified by standard compounds i.e. eugenol and linalool. These compounds are used because these are the dominant phenolic compounds in basil. The result showed that linalool spectrum is found in peak number 7 with 6,5 time retention. Total phenolics analysis showed that the highest concentration of them in the ethanolic extracts is 0,25 mg/g sample and in the essential oil is 5,20 mg/g essential oil. The DPPH (2,2-Dipheny1-1-pycrylhidrazil radical) free radical scavenging activity of the ethanolic extracts and the essential oil is tested and compared with I3-carotene and TBHQ. The result showed that the DPPH free radical scavenging activity of these antioxidant is in the order of [1-carotene > essential oil > ethanolic extracts > TBHQ respectively

Pengaruh Parakuat terhadap Produksi Hidrogen Peroksida secara Fotokimia dalam Kloroplas Daun Bayam (Spinacia oleraceae L.) Paini Sri Widyawati
agriTECH Vol 22, No 1 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The phytotoxicity of paraquat was suggested due to the production of toxic superoxide during the interaction of paraquat and photosystem l, on the other hand it is also suggested that the paraquat free radical itself is the toxicant. In this study, the effect of paraquat in the production of hydrogen peroxide in chloroplast of spinach leaves (Spinacia oleraceae L.), which is formed form superoxide in the presence of superoxide dismutase and water, was investigated under the influence of irradiation time, amount of oxygen and pH. The result showed that hydrogen peroxide was produced even if there is no paraquat added, meaning that the enzymes activity, such as superoxide dismutase, ascorbate peroxidase, dehydroascorbate reductase and glutathione reductase, cancelled the phytotoxicity of hydrogen peroxide production increases as paraquat is added, the irradiation time and the amount of oxygen present increases. The optimum pH for hydrogen peroxide production was 8. Further study using supernatant, chloroplast pellet and both supernatant and chloroplast pellet, showed that paraquat was acting as electron acceptor for electrons generated by photosystem l and catalyzing the hydrogen peroxide production. This result explain the desiccant effect of paraquat.

Aktivitas Antioksidan Minuman Daun Beluntas Teh Hitam (Pluchea indica Less-Camelia sinensis) Paini Sri Widyawati; Tarsisius Dwi Wibawa Budianta; Yesiana Dwi Wahyu Werdani; Maria Olivia Halim
agriTECH Vol 38, No 2 (2018)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The research was conducted to explore the potency of pluchea leaves-black tea drink as antioxidant at various proportions. The research used a single factor randomized block design of pluchea leaves and black tea proportions, including 100:0; 75:25; 50:50; 25:75; and 0:100% (w/w). Each of it was repeated five times. The parameters observed in this study were secondary metabolites, total phenolic, total flavonoids, free radical DPPH scavenging activity, and iron reducing power. The data were statistically analyzed using Analysis of Variance (ANOVA) at α = 5%, if the analysis showed a significant effect then it was continued with Duncan's Multiple Range Test (DMRT). Data was stated as mean ± standard deviation. The results showed that the secondary metabolites containing in drink from pluchea leaves and black tea at various proportions were alkaloids, flavonoids, phenolics, saponins, tannins, and cardiac glycosides. The increasing of black tea proportion in samples added the intensity of alkaloids, phenolics, flavonoids, saponins, and cardiac glycosides compounds detected, but the tannins were decreased. These secondary metabolites were correlated with total phenolic content (TPC) and total flavonoid content (TFC). The increasing of black tea proportion in drink significantly decreased DPPH free radical scavenging activity and iron ion reducing power, except for 100% black tea proportion. Tannin compounds seems determining antioxidant activity. Based on coefficient correlation between TPC or TFC and DPPH free radical scavenging activity or iron ion reducing power, the result showed that DPPH free radical scavenging activity was dominantly contributed by TPC and iron ion reducing power was determined by TPC and TFC. ABSTRAKPenelitian ini dilakukan untuk mengetahui potensi minuman daun beluntas teh hitam sebagai antioksidan pada berbagai proporsi. Penelitian ini menggunakan rancangan acak kelompok satu faktor, yaitu proporsi daun beluntas teh hitam meliputi 100:0; 75:25; 50:50; 25:75; dan 0:100% (b/b). Tiap faktor diulang sebanyak 5 kali. Parameter yang diamati pada penelitian ini meliputi kandungan metabolit sekunder, total fenolik (TPC), total flavonoid (TFC), kemampuan menangkal radikal bebas DPPH, dan kemampuan mereduksi ion besi. Data dianalisis secara statistik dengan Analysis of Variance (ANOVA) pada α = 5%, jika terdapat beda signifikan dilanjutkan dengan uji Duncan's Multiple Range Test (DMRT). Data dinyatakan dengan rata-rata ± standar deviasi. Hasil menunjukkan bahwa metabolit sekunder yang terkandung dalam minuman daun beluntas teh hitam pada berbagai proporsi adalah alkaloid, flavonoid, fenolik, saponin, tannin, dan kardiak glikosida. Peningkatan proporsi teh hitam menambah intensitas senyawa alkaloid, fenolik, flavonoid, saponin, dan kardiak glikosida yang terdeteksi, tetapi kandungan senyawa tannin berkurang. Kandungan metabolit sekunder ini berkorelasi dengan total fenolik (TPC) dan total flavonoid (TFC). Peningkatan proporsi teh hitam dalam minuman menurunkan kemampuan menangkal radikal bebas DPPH dan kemampuan mereduksi ion besi, kecuali pada proporsi teh hitam 100%. Kandungan senyawa tannin dalam minuman menentukan aktivitas antioksidan. Berdasarkan koefisien korelasi antara TPC atau TFC dan kemampuan menangkal radikal bebas DPPH atau kemampuan mereduksi ion besi, hasil menunjukkan bahwa kemampuan menangkal radikal bebas DPPH dominan dikontribusi oleh TPC dan kemampuan mereduksi ion besi ditentukan oleh TPC dan TFC.

Co-Authors Anita Maya Suteja Anna Ingani Widjajaseputra Azor Yulianus Tefa Christian Liguori Febrya Christin Handayani Buan Hadi Santoso Laurentinus Indah Epriliati Maria Olivia Halim Melvin Emil Simanjuntak Misail Epainetus Silla Monika Prahartiwi Poppy Finike Epifana Tumbol Pricilia Monica Ristiarini, Susana Sipayung, Boanerges Putra Tarsisius Dwi Wibawa Budianta Thomas Indarto Putut Suseno Werdani, Yesiana Dwi Wahyu Widyastuti, Theresia Endang Widoeri Wilda Lumban Tobing William Saputrajaya

Title Search

Found 4 Documents Search Journal : agriTECH

Abstract

Abstract

Abstract

Abstract

Title

Found 4 Documents
Search
Journal : agriTECH