Judul: Kajian Kinerja Surfaktan APG (Alkil Poliglikosida) untuk Aplikasi  Enhanced Waterflooding
Abstrak: Penelitian ini bertujuan untuk mengetahui kinerja serta mendapatkan formula terbaik surfaktan Alkil Poliglikosida (APG) untuk enhanced waterflooding pada contoh fluida dari lapangan minyak dan core sandstone sintetik. Enhanced waterflooding dilakukan melalui coreflooding test dengan dua kali ulangan. Coreflooding test dirancang dengan rancangan acak lengkap (RAL) dengan 1 faktor yaitu volume larutan surfaktan dengan 3 taraf yaitu 0,1 PV, 0,2 PV dan 0,3 PV dengan lama perendaman 12 jam. Berdasarkan hasil penelitian yang dilakukan Paulina Mwangi (2008), lama perendaman selama 12 jam mampu memberikan tambahan recovery sebesar 8 %. Hasil penelitian menunjukkan bahwa formula surfaktan terpilih yaitu APG SK-50 0.3% dengan salinitas 7000 ppm NaCl dan alkali 1000 ppm NaOH dimana menghasilkan nilai IFT sebesar 2.94 x 10-3 dyne/cm. Fluida yang digunakan adalah minyak dan Air Formasi dari Lapangan S. Formula tersebut diuji kinerja melalui uji compatibility, uji thermal stability, uji phase behavior dan uji filtrasi. Formula memiliki kinerja sangat baik pada uji compatibility, uji thermal stability, dan uji phase behavior. Pada uji thermal stability , nilai IFT yang dihasilkan sebesar 1.79 x 10-3 dyne/cm hingga hari ke-30. Sedangkan pada phase behavior, formula membentuk fase bawah pada minggu pertama dan membentuk fase mikroemulsi pada minggu terakhir pengamatan. Pada uji filtrasi formula menunjukkan kinerja kurang baik dimana pada uji filtrasi Fr yang dihasilkan melebihi dari yang ditetapkan yaitu 1,2. Berdasarkan hasil RAL dengan 1 faktor dengan dua kali ulangan diketahui bahwa perlakuan porevolume memberikan pengaruh secara signifikan terhadap recovery minyak yang dihasilkan. Dari hasil ini, kondisi terbaik yang dipilih yaitu formula surfaktan 0.2 PV dengan lama perendaman 12 jam.
Keyword: APG, EOR, Waterflooding, chemical flooding

Judul: Optimasi Nisbah Mol Pati Tapioka - Butanol dan Nisbah Mol Pati Tapioka - Fatty Alcohol C10 pada Proses Pembuatan Surfaktan Nonionik Alkil Poliglikosida (APG)
Abstrak: Nowadays, industries grow rapidly to produce assorted goods that are necessary to fulfill human needs. Industrial raw material requirement demands renewable raw material to guarantee industrial availability and sustainability. Therefore, assorted renewable raw materials are needed. Besides that, industries are demanded to pay attention for the environment preservation and ecosystem. Alkyl polyglycosides (APG) is a surfactant safe to environment because it is synthesized from natural raw materials based on carbohydrate likes sago, cassava, corn and vegetable oil such as coconut oil, palm oil, kapok seed oil and rubber seed oil. The main raw materials for producing APG is starch (sago, tapioca, etc.) or dextrose (based on starch) and fatty alcohol (based on vegetable oil). The objectives of this research were to obtain the optimum condition of the molar ratio of starch-butanol and the molar ratio of starch-fatty alcohol C10 on interfacial tension value, and to compare characterististics of APG produced from this research to APG commercial. Optimization used response surface method with central composite design. The variables were the molar ratio of starch-buthanol of 1: 6 - 1: 10 and starch-fatty alcohol C10 of 1: 2,5 - 1: 6. The result of optimum condition, based on interfacial tension value of water and xylene as parameter shows that surface model response was minimum. The optimum condition from validation result was interfacial tension value of water and xylene of 9 dynes/cm with the molar ratio of starch-butanol of 1 : 8,49 and and the molar ratio of starch-fatty alcohol of 1 : 4,66. The response surface model was Y = 9,354561 – 0,398990 X1 – 0,411616 X2 + 0,809388 X12 + 0,025000 X1X2 + 0,855307 X22. Characteristics of APG produced in optimum condition had similarity with those of APG commercial in their performances physicochemical properties, i.e. interfacial tension (9,75 dynes/cm and CMC value of 0,9 g/L), surface tension (34,55 dynes/cm and CMC value of 0,6 g/L), foam stability (87 %), emulsion stability (64%), pH (7,98) and HLB (13,8). FTIR analysis shows that the APG produced from this research had similar functional groups with those at the commercial product.
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Judul: Karakteristik Imago Jantan Ulat Sutera Liar Attacus atlas (Lepidoptera : Saturniidae)
Abstrak: This study aims to describe various morphometric parameters of male A. atlas moth, to found a correlation between the morphometric parameters and body weight on male moths, and to describe the reproductive system of male A. atlas moth. Male can distinguish from the female by comparing the antennae. The antennae of male is wider. There is a very strong correlation between the total body length and the body weight in linear equation Y = 0.875 X-1, 639 when Y is the weight in grams and X is the total body length in cm. Reproductive system of male A. atlas moth generally similer to B. mori reproductive system. Male A. atlas moth has reproductive system consists of a pair of testes, a pair of deferent duct with ampula ductus deferent, one spermatophore gland, one alba gland, one prostatica gland and one penis.
Keyword: reproductive system, Attacus atlas, morphometric