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.
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Judul: Profil kimiawi dari formula ekstrak meniran, kunyit, dan temulawak berdasarkan toksisitas terbaik
Abstrak: Phyllantin, turmeric and curcuma that known have antioxidant, antitumor, anticancer, and antibacterial activity. They are commonly used as single extract. Mixing two components of medicinal plant extracts can increase the bioactivity. The aim of this research was to know toxicity of phyllantin, turmeric and curcuma through Brine Shrimp Lethality Test and to know the profiles of TLC and FTIR that formula. Phyllantin, turmeric and curcuma was extracted with ethanol. Extract was made into seven formulation with 1:1:1; 1:1:0; 1:0:1; 0:1:1; 1:0:0; 0:1:0; 0:0:1 compilation. Toxicity of formulation was known through Brine Shrimp Lethality Test. Three best extract with the lowest LC50 were taken to define their chemical’s profile using TLC and FTIR. The best three extract were phyllantin:turmeric:curcuma in 0:0:1, 0:1:0, and 0:1:1, with LC50 17.94567, 20.09533, 37.66333 ppm, respectively. Phyllantin:turmeric:curcuma in 0:0:1 show TLC profile with thinner spot and without C=O bond for FTIR spectrum as the other two exctract have thick spot and have C=O bond.
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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.
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