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All Journal Media Statistika Jurnal Gaussian FITOFARMAKA: Jurnal Ilmiah Farmasi Sosio-Agri Papua : Publikasi Ilmu-Ilmu Sosial Ekonomi Pertanian APPA : Jurnal Pengabdian Kepada Masyarakat
Esti Pratiwi
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Social Sciences Other

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UJI KARAKTERISTIK FITOKIMIA DAN AKTIVITAS ANTIOKSIDAN BIJI KOPI ROBUSTA (Coffea canephora Pierre) DARI BOGOR, BANDUNG DAN GARUT DENGAN METODE DPPH (1,1-diphenyl-2-picrylhydrazyl) Wigati, Evi Indah; Pratiwi, Esti; Nissa, Trisni Fatwatun; Utami, Novi Fajar
FITOFARMAKA | Jurnal Ilmiah Farmasi Vol 8, No 1 (2018): Fitofarmaka, Vol.8, No.1, Juni 2018
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (38.814 KB)

Abstract

ABSTRAKKopi robusta mengandung senyawa alkaloid, flavonoid, saponin, tanin, kafein dan fenol. Senyawa fenol pada kopi memiliki aktivitas sebagai antioksidan. Biji kopi robusta yang ditanam di  daerah  Bandung, Bogor dan Garut, Jawa Barat dikenal memiliki ciri dan citarasa berbeda yang khas dan unik. Perbedaan jumlah kandungan senyawa kimia dari suatu  tumbuhan  disebabkan  oleh  perbedaan  agroekologi (iklim dan  ketinggian tempat). Daerah Pangalengan (Bandung) memiliki ketinggian 817 mdpl, Cariu (Bogor) memiliki ketinggian 680 mdpl dan Cikeris (Garut) memiliki ketinggian 900 mdpl. Tujuan dari penelitian ini untuk menentukan karakteristik fitokimia dan aktivitas antioksidan pada biji kopi robusta roasting yang ditanam di ketiga daerah tersebut. Karakteristik fitokimia dilakukan secara kualitatif dan aktivitas antioksidan dilakukan dengan metode DPPH  (2,2-difenil-1-pikrilhidrazil).  Hasil uji      karakteristik  fitokimia  menunjukkan bahwa  ekstrak  biji  kopi robusta  Bandung,  Bogor  dan  Garut  mengandung  senyawa alkaloid, flavanoid, saponin dan tanin. Ekstrak kopi robusta Bandung, Bogor dan Garut menunjukkan aktifitas antioksidan yang berbeda nyata berdasarkan hasil uji statistik analisis variansi dengan nilai IC50 masing-masing dicapai pada konsentrasi  55,13 ppm,56,48 ppm, dan 54,14 ppm. Dapat disimpulkan bahwa ekstrak kopi robusta dari Garutmemiliki kadar antioksidan paling tinggi dibandingkan dengan aktifitas antioksidan dari kopi robusta Bandung dan Bogor.Kata kunci: Kopi robusta, aktifitas antioksidan, metode DPPH   THE PHYTOCHEMICAL CHARACTERISTIC AND ANTIOXIDANT ACTIVITY OF ROBUSTA COFFEE BEAN (Coffea canephora Pierre) FROM BANDUNG, BOGOR AND GARUT BY DPPH (1,1-diphenyl-2-picrylhydrazyl) METHOD ABSTRACTRobusta  coffee  contains  alkaloids,  flavonoids,  saponins,  tannins,  caffeine  andphenols. Phenol compounds in coffee have activity as an antioxidant. Robusta coffee beans grown in the area of Bandung, Bogor and Garut, West Java is known to have a unique characteristics and distinctive flavors. The difference in chemical characteristics of plant compounds  is caused by the agroecological differences (climate and altitude). Pangalengan area (Bandung) has a height of 817 AMSL, Cariu (Bogor) has a height of680 AMSL mdpl and Cikeris (Garut) has a height of 900 AMSL mdpl. The purpose ofthis study was to determine the phytochemical characteristics and antioxidant activity of robusta roasting coffee beans grown in these three areas. Phytochemical characteristics were performed qualitatively and antioxidant activity was performed by DPPH method (2,2-diphenyl-1-picrylhydrazyl). The results of phytochemical characteristics test showed that the extract of robusta coffee bean from Bandung, Bogor and Garut contain alkaloid, flavanoid, saponin and tannin. The extract of robusta coffee from Bandung, Bogor and Garut showed significantly different antioxidant activity based on results of variance analysis statistical test with IC50 value of each achieved at concentrations of 55.13 ppm,56.48 ppm, and 54.14 ppm. It can be concluded that robusta coffee extract from Garut has the highest antioxidant level compared with antioxidant activity of robusta coffee from Bandung and Bogor.Keywords : Coffea canephora, antioxidant activity, DPPH method
BIPLOT UNTUK MENGETAHUI KARAKTERISTIK KABUPATEN/KOTA DI JAWA TENGAH BERDASARKAN PRODUKSI BAWANG PUTIH, BAWANG MERAH, CABE BESAR DAN CABE RAWIT Safitri, Diah; Suparti, Suparti; Pratiwi, Esti; Estiningrum, Tyas
MEDIA STATISTIKA Vol 7, No 1 (2014): Media Statistika
Publisher : Department of Statistics, Faculty of Science and Mathematics, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (124.049 KB) | DOI: 10.14710/medstat.7.1.47-52

Abstract

Biplot is a graphical representation of a data matrix. Garlic, onions, chili, and thai pepper are important plant in Indonesia because most people in Indonesia especially in Central Java consume garlic, onions, chili, and thai pepper every day. In this research, districts in Central Java seen characteristics are based on the productions of garlic, onions, chili, and thai pepper using biplot. There are highly correlation between chili and thai pepper, which means districts that have highly productions of chili will also tend to have highly production of thai pepper. There are some districts have the production of  garlic, onions, chili, and thai pepper relatively low, and there are some of the city has zero production of  garlic, onions, chili, and thai pepper.   Keywords: Biplot, Production of  garlic, onions, chili, thai pepper
PENENTUAN BOBOT PORTOFOLIO OPTIMAL DENGAN METODE RESAMPLED EFFICIENT FRONTIER UNTUK PERHITUNGAN VALUE AT RISK PADA DATA BERDISTRIBUSI NORMAL Esti Pratiwi; Abdul Hoyyi; Sugito Sugito
Jurnal Gaussian Vol 3, No 3 (2014): Jurnal Gaussian
Publisher : Department of Statistics, Faculty of Science and Mathematics, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (383.328 KB) | DOI: 10.14710/j.gauss.v3i3.6446

Abstract

The investors have a goal of getting return when they invest their wealth, but on the other hand they should bear the risk that might arise from their investment. There are three categories of investors based on their preferences toward risk that is risk averter, moderate risk and risk taker. To establish a portfolio that is able to incorporate investor preferences is used Resampled Efficient Frontier Method. Resampled Efficient Frontier Method is a development of the Mean Variance Efficient Portfolios Method, which used Monte Carlo simulation to obtain more estimated of parameter inputs. Based on the efficient portfolios of Resampled Efficient Frontier along the efficient frontier with 51 efficient points, taken optimal portfolio for each investor type. Optimal portfolio for risk averter, moderate risk and risk taker respectively is an efficient portfolio on the first point, 26th point, and 51st point. To describe the loss of the optimal portfolio is used Value at Risk. VaR is calculated based on monthly return from BBCA, LPKR, PGAS and SMGR during January 2008 until December 2013. Estimated VaR on 95% confidence level during 20 days holding period and the amount of investment allocation Rp 100,000,000.00 from the optimal portfolio for risk averter, moderate risk and risk taker respectively is Rp 50,706,000.00, Rp 54,618,000.00 and Rp 64,522,000.00
ANALISIS KELAYAKAN FINANSIAL USAHA TERNAK AYAM RAS PETELUR UNGGAS KENYUM DI KAMPUNG MUARA PRAFI DISTRIK MASNI KABUPATEN MANOKWARI Esti Pratiwi; Ishak Suwardi; Diana N. Irbayanti
Sosio Agri Papua Vol 9 No 1 (2020): JUNI
Publisher : Department of Social Economic Agriculture, Faculty of Agriculture, University of Papua, Manokwari, West Papua, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/sap.v9i1.73

Abstract

Manokwari is one of the producers of chicken eggs in West Papua province. The need for nutritious food is especially foods that contain protein today. This makes the need for chicken eggs to increase with the growth of the people of Manokwari. It is necessary to increase the population of laying chickens to meet the needs in Manokwari especially in Masni district. The addition of the population can be either DOC or Layer, so it is necessary to analyze financial feasibility to determine if the population increase is feasible from financial aspects. This research was conducted on poultry hatchling in the village of Kenyum Fowl in the Kampung Muara Masni District which assumed a bias for the addition of livestock as many as 1,220 laying chickens. This research was conducted on the efforts of poultry chicken laying in Kenyum for 2 weeks, starting from 23 December 2019 until 5 January 2020. The method used is a quantitative method with a case study approach. The subject in this study is the business owner of Poultry Egg laying chicken Kenyum. The sampling method performed is intentionally (purposive). The data collected in this study is primary data and secondary data. The results of this study stated that the business of Kenyum poultry in katakana deserves to be carried out from the financial aspect, both in DOC and layer additions. This is because assessments made using investment criteria show good results or qualify for eligibility. The value of Payback Period (PP) or the rate of return for 3 years 8 months for addition in the form of layers and 2 years 8 months for the addition of layers, and both are not more than the age of business is 5 years. The value of Net Present Value (NPV) produced in the business of poultry chicken egg laying Kenyum at a deposit interest rate of 5.5% is 331,899,382 for additions in the form of DOC and 2,259,789,228 for the addition of layers. The IRR (Internal Rate of Return) value for the addition of DOC is 22.54% and 89.37% for adding layers. As well as the Profitabillity Index (PI) value of 1.84 and 6.710.
Peningkatan Literasi Komunikasi Dakwah Digital: Pengabdian Mahasiswa KPI UIN Fatmawati Sukarno Bengkulu di Masjid Ash-Shobirin Sukarami Musyaffa; Novita Putri Ani; Esti Pratiwi; Rani Atri; Ruri Januansyah
APPA : Jurnal Pengabdian Kepada Masyarakat Vol 3 No 2 (2025): APPA : Jurnal Pengabdian kepada Masyarakat (INPRESS)
Publisher : Shofanah Media Berkah

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Abstract

Pengabdian masyarakat yang dilakukan oleh mahasiswa Program Studi Komunikasi dan Penyiaran Islam (KPI) UIN Fatmawati Sukarno Bengkulu di Masjid Ash-Shobirin Sukarami bertujuan untuk meningkatkan literasi komunikasi dakwah digital di kalangan takmir dan remaja masjid. Latar belakang kegiatan ini berangkat dari masih terbatasnya kemampuan masjid dalam mengelola media sosial dan menghasilkan konten dakwah digital yang kreatif, relevan, dan sesuai dengan kebutuhan jamaah. Metode pelaksanaan menggunakan pendekatan partisipatif melalui tahapan observasi, pelatihan literasi dakwah digital, praktik produksi konten, serta pendampingan dan evaluasi. Hasil kegiatan menunjukkan adanya peningkatan signifikan dalam tiga aspek utama: (1) pengetahuan takmir dan remaja masjid tentang urgensi literasi digital dakwah, (2) keterampilan teknis dalam produksi konten dakwah digital berupa poster dan video, serta (3) pengelolaan akun media sosial masjid yang lebih profesional dan terstruktur. Selain itu, pengabdian ini juga mendorong kolaborasi antar generasi, memperkuat peran masjid sebagai pusat dakwah modern, serta memberikan kontribusi pada pengembangan model dakwah digital berbasis komunitas. Meskipun terdapat tantangan seperti keterbatasan infrastruktur dan konsistensi pengelolaan akun, kegiatan ini membuktikan bahwa transformasi dakwah digital dapat dilakukan di tingkat komunitas masjid dan sejalan dengan strategi digitalisasi dakwah nasional.
Co-Authors Abdul Hoyyi Diah Safitri Diana N. Irbayanti Ishak Suwardi Musyaffa Nissa, Trisni Fatwatun Novi Fajar Utami Novita Putri Ani Rani Atri Ruri Januansyah Sugito Sugito Suparti Suparti Tyas Estiningrum Wigati, Evi Indah