Judul: Sintesis Hidrogel Antibakteri Berbasis Karboksimetil Selulosa- ZnSO4
Abstrak: Coconut water could be made into nata de coco that contain cellulose. The cellulose can be further chemically modified into cellulose derivates such as carboxymethyl cellulose (CMC). Then CMC was used as an antibacterial hydrogel materials using crosslinking agents such as succinic acid, and ZnSO4 as an antibacterial agent. The synthesized CMC was characterized for the degree of substitution, the pH of a CMC solution of 1%, and moisture content. The CMCsuccinic acid was characterized based on infrared spectra. The difractogram and microphotograph showed that ZnSO4 was not converted into ZnO. The surface analysis of the highest swelling of CMC-succinic acid-ZnSO4 hydrogel using scanning electron microscopy. The swelling ability of the hydrogel increase with the increasing ZnSO4 concentration. The antibacterial test showed that the synthesized hydrogel inhibited Staphylococcus aureus and Escherichia coli growth and potentialy used as an antibacterial hydrogel.
Keyword: Bogor Agricultural University (IPB), hydrogels, crosslinked CMC, cellulose modification, antibacterial activity

Judul: Sintesis Hidrogel Antibakteri Berbasis Karboksimetil Selulosa- TiO2
Abstrak: Carboxymethyl cellulose (CMC) hydrogels can be synthesized from bacterial cellulose. The reaction of CMC and succinic acid can be used as an antibacterial with the addition of TiO2 (Rutile). This study was to synthesize hydrogel-based antibacterial CMC-TiO2. The addition of succinic acid against CMC will form a crosslinking by the esterification reaction between the -OH group of succinic acid with polycarboxylic acid of CMC. The product was evaluated by the degree of substitution (DS), swelling ratio, water content, pH, the infrared spectrum, microphotographs, antibacterial test, and difractogram.The resulted DS was approximately 0.2368. The swelling ratio was affected by the TiO2 concentration. The higher the TiO2 concentration the higher the swelling ratio. CMC-succinic-TiO2 was able to inhibit Staphylococcus aureus and Escherichia coli in each TiO2 concentration. The increasing TiO2 concentration was followed by the higher capability of bacteria inhibition. Therefore, CMCsuccinic- TiO2 is potential as a material for antibacterial
Keyword: Bogor Agricultural University (IPB), TiO2, succinic acid, hydrogels, Carboxymethyl cellulose

Judul: Technical  analysis  to  determine  forex  online  open  and close  position  eur/usd  currency  pair  for  2010-2013  period  of  time
Abstrak: Dalam dunia investasi khususnya investasi keuangan sangat beragam jenisnya, namun investasi forex online adalah yang terbaik dalam hal modal. Forex Online memberikan banyak kebingungan kepada para trader dalam membuka posisi dan menutup posisi trading yang tepat karena harga bergerak hampir tidak beraturan. Penelitian ini dilakukan untuk menganalisis sinyal buka posisi dan tutup posisi pasangan mata uang EUR/USD tersebut dengan menggunakan analisis teknikal. Hasil penelitian didapatkan bahwa untuk computerized chart Analysis memiliki 5 buka posisi menghasilkan pip total sebanyak 4785.8 pip. Untuk classical chart Analysis, pola candlesitck memiliki 8 buka posisi menghasilkan pip total sebanyak 8114,3 pip dan pola grafik memiliki 6 buka posisi menghasilkan pip total 5557,1 pip. Kata kunci: Analisis teknikal, computerized chart Analysis, pola candlestick, pola grafik, pasangan mata uang EUR/USD., In the world of investment especially monetary investment have many variety, but forex online investment its the best for capital. Forex online give so many confuse to traders in which way that traders open and close position because price moved almost uncertain. This study was conducted to analyze open and close position signal for EUR/USD currency pair with technical Analysis. The results showed that computerized chart Analysis have 5 open position that produce 4785,8 pips total. For classical chart Analysis, candlestick pattern have 8 open position produce 8114,3 pips total and graph pattern have 6 open position produce 5557,1 pips total.
Keyword: Analisis teknikal, computerized  chart  Analysis, pola  candlestick, pola  grafik, pasangan mata uang EUR/USD