Judul: Toksisitas dan Profil Kimiawi Ekstrak Ramuan Meniran, Kunyit, dan Temulawak
Abstrak: Turmeric, curcumin, and phyllantin are one of medicinal plants that has high potency to be explored nowadays. This research was done to determine the toxicity effects from turmeric, curcumin, and phyllantin mixed extract, and also to define the mixed extract chemical’s profile with KLT and FTIR. Mixed extract were made by mixing turmeric, curcumin, and phyllantin in seven different composition, that were 1:1:1; 1:1:0; 1:0:1; 0:1:1; 1:0:0; 0:1:0; 0:0:1. Then its toxicity effect were measured by exposing Artemia salina to the extract for 24 hours. Three best extract with the lowest LC50 were taken to define their chemical’s profile using TLC and FTIR. The best three extract were tumeric: curcumin: phyllantin mixture extract in 1:1:1; 1:1:0; and 1:0:1 proportion, with LC50 5.5377 ppm, 16.3763 ppm, and 11.6243 ppm, respectively. Mixed compound extract with high biological potential (5.537 ppm) show TLC profile with thick spot and without C≡C bond for FTIR spectrum as the other two exctract have thinner spot and have C≡C bond.
Keyword: 

Judul: Profil Kimiawi Ekstrak Ramuan Kunyit, Temulawak, dan Meniran Berdasarkan Aktivitas Antioksidan
Abstrak: Research of the antioxidants and chemical profile that generated a lot of herbs have been carried out. The aim of this research is to analyze chemical profile of extracts concoction turmeric, curcuma, and meniran based of the best antioxidant activity. Samples were made formula and prepared by maceration with 96% ethanol. Formula used based on the comparison meniran:turmeric:curcuma, that is 1:1:1, 1:1:0, 1:0:1, 0:1:1, 1:0:0, 0:1:0, and 0:0:1. Antioxidant activity was determined by 1,1-diphenyl-2-picrylhidrazyl (DPPH) method. The extracts concoction chemical profiles was determined by spectrophotometry fourier transform infrared (FTIR) and thin layer chromatography (TLC). The extracts concoction turmeric, curcuma, meniran showed high antioxidant activity because they had IC50 less than 200 ppm, except formula 0:0:1. Three extracts having highest antioxidant activity are formula 1:0:0, 1:0:1, and 0:1:0 were 19.9135 ppm, 69.5428 ppm, and 103.3161 ppm respectively. The chemical profiles from those extracts showed different pattern because they have different functional groups (based of FTIR profiles) and different number of separate compounds (based of TLC profiles).
Keyword: 

Judul: Implementasi Algoritme Enkripsi Advanced Encryption Standard secara Paralel dengan GPU NVIDIA CUDA
Abstrak: Processor streaming architecture in GPU has provide general purpose computation which have its own potential to help CPU with its parallel computation capability. One example of supported processor streaming architecture is Fermi which is developed by NVIDIA. Furthermore, NVIDIA has developed its own software development kit namely CUDA, which can integrate many popular existing programming languanges such as C++ for GPU-based parallel computation. This research focus on the implementation of parallel AES algorithm with GPU and analyze the performance result of the implementation in two different NVIDIA devices, namely NVIDIA GeForce GT220 and NVIDIA Quadro 600. In general, the performance of parallel GPU computation is better than sequential computation for large data input. It is obtained that the maximum speedup of NVIDIA GeForce GT220 in 8 MB input is 89.3 with 180% efficiency. Higher speedup of 101.6 can be obtained by NVIDIA Quadro 600 with the same input size with around 100% efficiency.
Keyword: