Judul: Ekstraksi Pigmen dan Aktivitas Antioksidan Rumput Laut Kering Kappaphycus alvarezii Perairan Tarakan
Abstrak: Kappaphycus alvarezii merupakan salah satu jenis rumput laut yang banyak dibudidayakan. K. alvarezii diketahui memiliki biopigmen dalam tubuhnya, antara lain kelompok fikobiliprotein, klorofil dan karoten. Kelompok pigmen fikobiliprotein merupakan pigmen dominan dalam rumput laut jenis K. alvarezii Penelitian bertujuan untuk mendapatkan kadar pigmen dan antioksidan terbaik dari rumput laut menggunakan waktu maserasi berbeda. Penelitian ini menggunakan Rancangan Acak Lengkap dengan uji lanjut Duncan. Ekstrak K. alvarezii waktu ekstraksi 3 jam merupakan perlakuan terbaik dengan konsentrasi pigmen fikoeritrin 0.0220 mg/mL, fikosianin 0.0064 mg/mL, allofikosianin 0.0068 mg/mL, karoten 0.0161 mg/g, dan klorofil 0.0091 mg/g. Aktivitas antioksidan diperoleh menggunakan metode CUPRAC. Hasil aktivitas antioksidan tertinggi terdapat pada perlakuan waktu maserasi 3 jam 31.44 μg/mL asam askorbat per g ekstrak., Kappaphycus alvarezii is a type of seaweeds that is widely cultivated. K. alvarezii contain biopigments in its body including clorophyl, carotene, and phycobiliprotein. The phycobiliprotein pigment group is dominant pigment can be found in the thallus of this type of seaweed. The aim of this study was to obtain the best time maceration on pigment and antioxidant value. Completely Randomized Design (CRD) was used in this study with Duncan as further test. K. alvarezii extract with a maceration time of 3 hours is the best treatment with a pigment concentration of 0.0220 mg/mL of phycoeritrin, 0.0064 mg/mL of phycocyanin, 0.0068 mg/mL of allophycocyanin, 0.0161 mg/g of carotene, and 0.0091 mg/g of chlorophyll. Antioxidant activity was carried out using the CUPRAC method. The highest antioxidant activity was found in 3 hour maceration time treatment 31.44 μg / mL of ascorbic acid per g of extract.
Keyword: Aktivitas antioksidan, Kappaphycus alvarezii, Pigmen

Judul: Literature Review of Antioxidant Activity and Carrageenan of Kappaphycus alvarezii at Different Water Locations
Abstrak: Kappaphycus alvarezii merupakan rumput laut yang banyak diproduksi di Indonesia dan merupakan komoditas rumput laut yang banyak diminati. Tujuan penelitian ini adalah membandingkan pengaruh lokasi perairan yang berbeda berdasarkan sumber pustaka terhadap proksimat, rendemen, antioksidan, viskositas dan kekuatan gel karaginan rumput laut K. alvarezii. Penelitian ini berupa kajian literatur yang memperoleh informasi dan data dari jurnal nasional dan internasional yang dianalisis dengan metode uji independent sample t-test . Rataan kadar abu K. alvarezii sebesar 16,25±3,37% (Indonesia) dan 34,99±8,88% (luar Indonesia). Rataan aktivitas antioksidan K. alvarezii sebesar 24,80±2,63 ppm (Indonesia) dan 13435±2312,2 ppm (luar Indonesia). Rataan rendemen ekstrak K.alvarezii sebesar 3,73±2,79% (Indonesia) dan 2,62±0,32% (luar Indonesia). Rataan kekuatan gel karaginan ekstrak K. alvarezii yaitu 415,73±155,21 g/cm2 (Indonesia) dan 884,15±8,27 g/cm2 (luar Indonesia). Rataan viskositas karaginan ekstrak K. alvarezii sebesar 23,76±5,59 cP (Indonesia) dan 138,15±32,73 cP (luar Indonesia). Lokasi peraiaran luar Indonesia lebih unggul dalam hasil kekuatan gel dan viskositas karaginan., Kappaphycus alvarezii is seaweed that is widely produced in Indonesia and this seaweed commodity has a great demand. The purpose of this study was to compare the effect of different water locations based on literature on the proximate, yield, antioxidant, viscosity and carrageenan gel strength of K. alvarezii. This research is in the form of a literature review that obtains information and data from national and international journals which are analyzed using independent sample t-test. The average ash content of K. alvarezii was 16.25±3.37 % (Indonesia) and 34.99±8.88 % (non-Indonesian). The average antioxidant activity of K. alvarezii was 24.80±263 ppm (Indonesia) and 13435±2312.2 ppm (non-Indonesian). The average yield of K. alvarezii extract was 3.73±2.79 % (Indonesia) and 2.62±0.32 % (non-Indonesian). The average strength of K. alvarezii extract carrageenan gel was 415.73±155.21 g/cm2 (Indonesia) and 884.15±8.27 g/cm2 (non-Indonesian). The average viscosity of carrageenan extract of K. alvarezii was 23.76±5.59 cP (Indonesia) and 138.15±32.73 cP (non-Indonesian). Non-Indonesian locations are superior in terms of gel strength and carrageenan viscosity.
Keyword: antioxidant, carrageenan, Kappaphycus alvarezii, waters location

Judul: The addition of a noun word graph dictionary module in bogordelftconstruct
Abstrak: Knowledge Graph is a new method in Natural Language Processing that is used to describe human language and displaying it into a graph form. BogorDelftConStruct is a tool to analyze Indonesian text, developed by Deni Romadoni (2009). The tool has limited feature, opening many opportunities to add some other features. The goal of this research is to develop a noun word graph dictionary module and add it in BogorDelftConStruct. The patterns of the noun word-graph are based the research of Saleh (2009). In this research, of the 20 patterns in Saleh (2009) only 13 patterns are used, since some of word graph patterns which have the same affix and also have the different meaning. As many as 144 nouns were used in scenario testing, with 1 error was generated (99,33% accuracy).
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