Judul: Kelekatan Orang Tua, Kelekatan Teman Sebaya, Status Identitas Diri, dan Orientasi Seksual Sesama Jenis pada Remaja.
Abstrak: Salah satu gangguan seksual yang sering ditemukan pada remaja adalah homoseksualitas. Penelitian ini bertujuan untuk menganalisis pengaruh karakteristik keluarga, karakteristik remaja, kelekatan orang tua, kelekatan teman sebaya, dan status identitas diri terhadap orientasi sesama jenis pada remaja. Penelitian ini menggunakan desain cross sectional study. Data yang dikumpulkan berupa data primer dari 45 responden dengan menggunakan pendekatan penelitian campuran kualitatif dan kuantitatif. Data primer diperoleh menggunakan teknik interview dan self report dengan menggunakan kuesioner pertanyaan tertutup dan terbuka. Hasil menunjukkan bahwa, ketika berpacaran dengan sesama jenis, lebih dari setengah remaja melakukan perilaku seksual kategori berat. Remaja mulai merasakan dirinya seorang penyuka sesama jenis sejak duduk sekolah dasar. Hasil uji korelasi menunjukkan adanya hubungan identitas foreclosure dengan orientasi seksual sesama jenis. Hasil uji pengaruh menunjukkan kelekatan teman sebaya pada dimensi kepercayaan memiliki pengaruh positif terhadap orientasi seksual sesama jenis pada remaja. Sedangkan kelekatan ibu pada dimensi komunikasi, kelekatan teman sebaya pada dimensi pengasingan dan identitas foreclosure memiliki pengaruh negatif terhadap orientasi seksual sesama jenis.
Keyword: homoseksual, kelekatan orang tua, kelekatan teman sebaya, otirntasi seksual, remaja, status identitas diri

Judul: Kelekatan Orang Tua, Kelekatan Teman Sebaya, dan Perkembangan Psikososial Remaja yang Tinggal dan Tidak Tinggal Bersama Orang Tua.
Abstrak: Salah satu aspek perkembangan yang harus dicapai remaja adalah perkembangan psikososial. Penelitian ini bertujuan untuk menganalisis pengaruh kelekatan orang tua, kelekatan teman sebaya terhadap perkembangan psikososial remaja yang tinggal bersama orang tua kandung dan remaja yang tidak tinggal bersama orang tua kandung. Remaja dalam penelitian ini berusia 17-21 tahun dan dibedakan berdasarkan remaja yang tinggal bersama orang tua kandung sebanyak 41 orang dan remaja yang tinggal bersama wali sebanyak 36 orang. Hasil penelitian menunjukkan adanya perbedaan kelekatan dengan ibu pada remaja yang tinggal bersama orang tua kandung dan remaja yang tidak tinggal bersama orang tua kandung. Selain itu, terdapat hubungan positif signifikan antara kelekatan orang tua, kelekatan teman sebaya dengan perkembangan psikososial remaja. Kelekatan dengan ayah dan teman sebaya berpengaruh positif signifikan terhadap perkembangan psikososial remaja tahap identity.
Keyword: kelekatan, orang tua kandung, tahap perkembangan psikososial, remaja, teman sebaya

Judul: Process engineering of cassava pulp hydrolysis using microwave heating for ethanol production
Abstrak: Cassava pulp is a potential source of carbohydrates. In this work, characteristics of the cassava pulp were analyzed and validity of microwave irradiation for hydrolysis of carbohydrates, especially starch present in the cassava pulp, was estimated as a non-enzymatic saccharification technique. The hydrolysis was performed in water and acid medium. In addition, the role of activated carbon in the microwave-assisted hydrolysis was also evaluated. An optimization of the hydrolysis was conducted using Central Composite Design (CCD) and was analyzed using Response Surface Methodology (RSM). Fermentation of cassava pulp hydrolysates produced from microwave-assisted acid hydrolysis was performed to those added with activated carbon (25% w/w) and those without activated carbon by Saccharomyces cerevisiae. There were two types of activated carbon, which have different adsorption properties, used in this experiment. Results of the cassava pulp characterization shows that the starch granules in the cassava pulp were trapped in biomass matrices, so that the starch was harder to hydrolyze than the free starch, such as that in tapioca flour. Microwave-assisted hydrolysis of cassava pulp can be completed in less than 15 minutes in water medium, and less than 10 minutes in acid medium. The addition of activated carbon improved hydrolysis of cassava pulp starch in water medium with suppression of formation of the secondary decomposed materials. The highest glucose yield obtained from cassava pulp was 46% of dry matter or 52% of theoretical, which was about 60% higher than the one without the addition of activated carbon. On the contrary, the addition of activated carbon decreased the glucose yield when the hydrolysis was performed in acid medium (0.5% H2SO4). The glucose yield could reach 80.8% of dry matter or 91.5% of theoretical yield when no activated carbon was added in the acid medium. The estimated optimum condition for cassava pulp hydrolysis under microwave irradiation was using 0.88% sulfuric acid with 9 minutes of heating time, which resulted in 85% of theoretical glucose yield and 140 g/L glucose concentration. At the end of the fermentation the ethanol yield and concentration obtained in the samples treated with activated carbon (0.41-0.43 g ethanol / g glucose consumed; 34-35 g/L) were lower than that not treated with activated carbon or those treated with activated carbon which was added after hydrolysis (0.48 g ethanol / glucose consumed; 38- 39 g/L). However, the fermentation was completed very much faster in the hydrolysates treated with the activated carbon which has a high adsorption capacity than in that not treated with activated carbon or those treated with activated carbon of low adsorption capacity. Therefore, ethanol productivities (0.44-0.55 g/L/h) of the former were higher than the latter (0.28-0.34 g/L/h).
Keyword: