Judul: Pemanfaatan asap cair tempurung kelapa sebagai bahan pengawet ikan teri nasi (Stolephorus Commersonii, Lac.) segar untuk tujuan transportasi
Abstrak: Liquid smoke is a smokes that disperse in water resulted by dry pyrolisation of raw smoked material (such as wood), and next step is processed by condensation. Liquid smoke derive from natural material which is burning of hemicellulose, cellulose, and lignin of hardwoods, with the result that compound has disinfectant and antioxidan effect, like acid compound and derivative compound, alcohol, phenol, aldehyde, carbonil, keton, and piridin. The utilization of liquid Smoke includes the food industry as preservative, bioinsectisida, and disinfectant. Transportation is one of important process in post-harvest handling. Handling fish unappropriately during the transportation (a period of more than 7 days) will be affect the quality of fish either physically or chemically. The use of ice as fish preservative has some weaknesses, among others requiring a lot of spaces, if the ice melts it will gain the transport burden, and lessen the fish flesh texture. Due to the weaknesses, it encourages the utilization of liquid smoke as preservative during handling the transportation. The aims of research to find out the long term preservation of fresh rice anchovy fish by using coconut shells liquid smoke for 9 days of storage times, as well as finding out the effect of using liquid smoke as preservative toward the physical and chemical characteristic of fresh rice anchovy fish. At the beginning this research ws carried out by proximate analysis on fresh rice anchovy fish and liquid smoke analysis and also analyzed liquid smoke. After doing both analysis, then is continued by soaking process in liquid smoke. The factors in this observational design consist of, (a ) liquid smoke concentration that utilized by 2 levels namely: a 1 = 20%, a 2 = 30 %, and (b) soaking long times in liquid smoke with 3 levels, namely: b 1 = 15 minutes, b 2 = 30 minutes and b 3 = 45 minutes. Afterward fresh tiny anchovy fish on each observation was continued by measuring phenol content. The best result of each observation continued by storaging at the room temperature for 9 days and observed every 2 days (1st day, 3,5, 7, and 9). During the storage, it was observed on water contents, protein rate and Total Plate Counts (TPC) test, mould and khamir. The result of the research showed that the coconut shells liquid smoke which utilized has good quality with criteria, specific chemical component dominant as phenol broadly area percent 21,55 %, pH 3,29, acid contents 37 %, and phenol content 38 %. Nutrient composition of fresh rice anchovy fish, which is water content 80,39 %, ash rate 3,25 %, fat rate 2,45 %, and protein rate 13,74 %. Based on ANOVA test, it was obtained the best result on liquid smoke concentration 30 % soaking long times 45 minutes which is 0,68 % of phenol content. The preservation process through soaking liquid smoke of fresh rice anchovy fish (Stolephorus commersonii, Lac.), it can keep its freshness until the 9th day. It can be seen from the observation result on protein rate which approaches to assess early protein rate (13,74 %) which is 13,17
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Judul: Kajian Penggunaan Asap Cair Tempurung Kelapa terhadap Daya Awet Bakso Ikan
Abstrak: The study investigated safeties and antibacterial activity of coconut shell liquid smoke and its applications of fishball preservation. The safeties of liquid smoke studied by identification of volatile compounds of liquid smoke by means of Gas Chromatography-Mass Spectroscopy (GC-MS) and determination acute toxicity of liquid smoke. A high number of compounds was detected. They were identified as ketones, carbonyl, acids, furan and pyran derivatives, phenol and derivatives, guaiacol and derivatives, syringol and derivatives, and alkyl aryl ethers. Neither benzo[a]pyrene nor other polycyclic aromatic compounds with carcinogenic properties were found in this liquid smoke. Acute toxicity test of these product assessed by determination of LD50 dose (the dose which causes the death of half the test animals). Results indicated that LD50 dose of this liquid smoke are more than 15.000 mg/kg body weight of mice. The Minimum Inhibitory Concentration (MIC) of liquid smoke against Pseudomonas aeruginosa and Staphylococcus aureus determined using broth or agar dilution methods. Liquid smoke showed antibacterial activities againts P. aeruginosa and S. aureus with MIC value 0,22% and 0,40%, respectively. Applications of 2,5% liquid smoke in fishball at 27–28 0C increased shelflife from 16 to 32 hours, whereas at 4±1 0C until 20 days storage were better accepted, and retarded the decreased of pH and moisture content compared to control. The results indicated that liquid smoke was an effective preservative agent for fishball.
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Judul: Formulasi Algoritme Operasi Grup Jacobian Kurva Hyperelliptic ...
Abstrak: Dalam geometri aljabar, kurva hyperelliptic merupakan bentuk umum dari kurva elliptic. Kurva ini apabila dikenakan pada suatu lapangan berhingga akan membentuk suatu grup siklik. Pada kriptografi, khususnya enkripsi kunci publik, grup siklik yang dibangkitkan oleh kurva elliptic sudah banyak diteliti. Bahkan untuk kurva ini sudah memiliki standar oleh National Institute of Standard and Technology (NIST) Amerika. Sedangkan, untuk grup yang dibangkitkan oleh kurva hyperelliptic masih memiliki kekurangan dalam hal komputasinya. Tujuan dari penelitian ini adalah mengkonstruksi suatu lapangan berhingga pada , memilih kurva hyperelliptic atas lapangan hingga yang memenuhi kriteria keamanan untuk kriptografi, dan membuat formulasi operasi grup kurva hyperelliptic menggunakan algoritme Cantor. Dalam merekonstruksi lapangan hingga, terlebih dahulu tentukan dimensi dari lapangan hingga tersebut dan polinomial tak-teruraikan. Kemudian dipilih kurva hyperelliptic atas lapangan tersebut. Pada penelitian ini, kurva yang dipilih adalah = + + dengan lapangan hingga . Berdasarkan kurva yang dipilih, akan dibentuk suatu operasi grup dengan menggunakan algoritme Cantor, sehingga menjadi lebih aritmatik. Eksplorasi kurva hiperelliptic dilakukan untuk mengetahui keamanan dari kurva yang dipilih. Dengan menyusun algoritme operasi grup dari kurva yang dipilih, diperoleh perhitungan yang lebih aritmatik dan dapat diimplementasikan pada kriptografi kunci publik. Dari segi keamanan kurva telah memenuhi standar sehingga tahan terhadap serangan-serangan seperti Poligh-Hellman, Polard- , ataupun Frey-Ruck secara teorema.
Keyword: algoritme Cantor, kriptografi, kunci publik, kurva hyperelliptic, operasi grup